Publikationen SGS: Bibliographie BibTeX
@inproceedings {INPROC-2020-30,
author = {Alireza Naseri and Amin Totounferoush and Ignacio Gonzales and Miriam Mehl and Carlos P{\'e}rez-Segarra},
title = {{A scalable framework for the partitioned solution of fluid–structure interaction problems}},
booktitle = {Computational Mechanics},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2020},
isbn = {10.1007/s00466-020-01860-y},
keywords = {Mehl, Miriam; P{\'e}rez-Segarra, Carlos},
language = {Englisch},
cr-category = {G.1.8 Partial Differential Equations,
J.2 Physical Sciences and Engineering,
J.3 Life and Medical Sciences},
ee = {https://link.springer.com/article/10.1007/s00466-020-01860-y},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {In this work, we present a scalable and efficient parallel solver for the
partitioned solution of fluid–structure interaction problems through multi-code
coupling. Two instances of an in-house parallel software, TermoFluids, are used
to solve the fluid and the structural sub-problems, coupled together on the
interface via the preCICE coupling library. For fluid flow, the Arbitrary
Lagrangian–Eulerian form of the Navier–Stokes equations is solved on an
unstructured conforming grid using a second-order finite-volume discretization.
A parallel dynamic mesh method for unstructured meshes is used to track the
moving boundary. For the structural problem, the nonlinear elastodynamics
equations are solved on an unstructured grid using a second-order finite-volume
method. A semi-implicit FSI coupling method is used which segregates the fluid
pressure term and couples it strongly to the structure, while the remaining
fluid terms and the geometrical nonlinearities are only loosely coupled. A
robust and advanced multi-vector quasi-Newton method is used for the coupling
iterations between the solvers. Both the fluid and the structural solver use
distributed-memory parallelism. The intra-solver communication required for
data update in the solution process is carried out using non-blocking
point-to-point communicators. The inter-code communication is fully parallel
and point-to-point, avoiding any central communication unit. Inside each
single-physics solver, the load is balanced by dividing the computational
domain into fairly equal blocks for each process. Additionally, a load
balancing model is used at the inter-code level to minimize the overall idle
time of the processes. Two practical test cases in the context of hemodynamics
are studied, demonstrating the accuracy and computational efficiency of the
coupled solver. Strong scalability test results show a parallel efficiency of
83\% on 10,080 CPU cores.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2020-30&engl=0}
}
@inproceedings {INPROC-2020-16,
author = {Steffen Hirschmann and Andreas Kronenburg and Colin W. Glass and Dirk Pfl{\"u}ger},
title = {{Load-Balancing for Large-Scale Soot Particle Agglomeration Simulations}},
booktitle = {Parallel Computing: Technology Trends},
editor = {Ian Foster and Gerhard R. Joubert and Ludek Kucera and Wolfgang E. Nagel and Frans Peters},
publisher = {IOS Press},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Advances in Parallel Computing},
volume = {36},
pages = {147--156},
type = {Konferenz-Beitrag},
month = {M{\"a}rz},
year = {2020},
doi = {10.3233/APC200035},
language = {Englisch},
cr-category = {G.0 Mathematics of Computing General},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2020-16/INPROC-2020-16.pdf},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {In this work, we combine several previous efforts to simulate a large-scale
soot particle agglomeration with a dynamic, multi-scale turbulent background
flow field. We build upon previous simulations which include 3.2 million
particles and implement load-balancing into the used simulation software as
well as tests of the load-balancing mechanisms on this scenario. We increase
the simulation to 109.85 million particles, superpose a dynamically changing
multi-scale background flow field and use our software enhancements to the
molecular dynamics software ESPResSo to simulate this on a Cray XC40
supercomputer. To verify that our setup reproduces essential physics we scale
the influence of the flow field down to make the scenario mostly homogeneous on
the subdomain scale. Finally, we show that even on the homogeneous version of
this soot particle agglomeration simulation, load-balancing still pays off.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2020-16&engl=0}
}
@inproceedings {INPROC-2019-39,
author = {Klaudius Scheufele and Shashank Subramanian and Andreas Mang and George Biros and Miriam Mehl},
title = {{IMAGE-DRIVEN BIOPHYSICAL TUMOR GROWTH MODEL CALIBRATION}},
booktitle = {SIAM Journal on Scientific Computing},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {1--24},
type = {Konferenz-Beitrag},
month = {Juli},
year = {2019},
keywords = {tumor progression inversion; biophysical model calibration; image registration; PDE constrained optimization; Picard iteration},
language = {Englisch},
cr-category = {J.3 Life and Medical Sciences},
ee = {https://arxiv.org/abs/1907.07774},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {We present a novel formulation for the calibration of a biophysical tumor
growth model from a single-time snapshot, MRI scan of a glioblastoma patient.
Tumor growth models are typically nonlinear parabolic partial differential
equations (PDEs). Thus, we have to generate a second snapshot to be able to
extract significant information from a single patient snapshot. We create this
two-snapshot scenario as follows. We use an atlas (an average of several scans
of healthy individuals) as a substitute for an earlier, pretumor, MRI scan of
the patient. Then, using the patient scan and the atlas, we combine
image-registration algorithms and parameter estimation algorithms to achieve a
better estimate of the healthy patient scan and the tumor growth parameters
that are consistent with the data. Our scheme is based on our recent work
(Scheufele et al, ``Biophysically constrained diffeomorphic image registration,
Tumor growth, Atlas registration, Adjoint-based methods, Parallel algorithms'',
CMAME, 2018), but apply a different and novel scheme where the tumor growth
simulation in contrast to the previous work is executed in the patient brain
domain and not in the atlas domain yielding more meaningful patient-specific
results. As a basis, we use a PDE-constrained optimization framework. We derive
a modified Picard-iteration-type solution strategy in which we alternate
between registration and tumor parameter estimation in a new way. In addition,
we consider an {\^a}„“1 sparsity constraint on the initial condition for the tumor
and integrate it with the new joint inversion scheme. We solve the subproblems
with a reduced-space, inexact Gauss-Newton-Krylov/quasi-Newton methods. We
present results using real brain data with synthetic tumor data that show that
the new scheme reconstructs the tumor parameters in a more accurate and
reliable way compared to our earlier scheme.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2019-39&engl=0}
}
@inproceedings {INPROC-2018-52,
author = {Nehzat Emamy and Pascal Litty and Thomas Klotz and Miriam Mehl and Oliver R{\"o}hrle},
title = {{POD-DEIM model order reduction of the Monodomain Reaction-Diffusion Sub-Model of the Neuro-Muscular System}},
booktitle = {IUTAM Symposium on Model Order Reduction of Coupled Systems; Stuttgart, Germany, May 22-25, 2018: MORCOS 2018},
editor = {J. Fehr and B. Haasdonk},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {1--14},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2018},
isbn = {879-3-030-21012-0},
language = {Englisch},
cr-category = {I.6.0 Simulation and Modeling General},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {We apply POD-DEIM model order reduction to a 0D/1D model used to simulate the
propagation of action potentials through the myocardium or along skeletal
muscle fibers. This corresponding system of ODEs (reaction) and PDEs
(diffusion) is called the monodomain equation. 0D sets of ODEs describing the
ionic currents flowing across the cell membrane are coupled along muscle fibers
through a \$1\$D diffusion process for the transmembrane potential. Due to the
strong coupling of the transmembrane potential and other state variables
describing the behavior of the membrane, a total reduction strategy including
all degrees of freedom turns out to be more efficient than a reduction of only
the transmembrane potential. The total reduction approach is four orders of
magnitude more accurate than partial reduction and shows a faster convergence
in the number of POD modes with respect to the mesh refinement. A speedup of
\$2.7\$ is achieved for a 1D mesh with \$320\$ nodes. Considering the DEIM
approximation in combination with the total reduction, the nonlinear functions
corresponding to the ionic state variables are also approximated in addition to
the nonlinear ionic current in the monodomain equation. We observe that the
same number of DEIM interpolation points as the number of POD modes is the
optimal choice regarding stability, accuracy and runtime for the current
POD-DEIM approach.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2018-52&engl=0}
}
@inproceedings {INPROC-2018-51,
author = {Nehzat Emamy and Pascal Litty and Thomas Klotz and Miriam Mehl and Oliver R{\"o}hrle},
title = {{POD-DEIM model order reduction for the Monodomain reaction-dissusion equation in neuro-muscular system}},
booktitle = {Proceedings of 6th European Conference on Computational Mechanics (Solids, Structures and Coupled Problems) (ECCM 6) and the 7th European Conference on Computational Fluid Dynamics (ECFD 7); Glasgow, UK, June 11-15, 2018},
editor = {Roger Owen and Ren{\'e} de Borst and Jason Reese and Chris Pearce},
publisher = {International Center for Numerical Methods in Engineerin (CIMNE)},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {2514--2524},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2018},
isbn = {978-84-947311-6-7},
language = {Englisch},
cr-category = {A General Literature,
G Mathematics of Computing,
E Data},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2018-51/INPROC-2018-51.pdf},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {We apply the POD-DEIM model order reduction to the propagation of the
transmembrane potential along \$1\$D muscle fibers. This propagation is
represented using the monodomain partial differential equation. The monodomain
equation, which is a reaction-diffusion equation, is coupled through its
reaction term with a set of ordinary differential equations, which provide the
ionic current across the cell membrane. Due to the strong coupling of the
transmembrane potential and ionic state variables, we reduce them all together
proposing a total reduction strategy. We compare the current strategy with the
conventional strategy of reducing the transmembrane potential. Considering the
current approach, the discrete system matrix is slightly modified to adjust for
the size. However, size of the precomputed reduced system matrix remains the
same, which means the same computational cost. The current approach appears to
be four orders of magnitude more accurate considering the equivalent number of
modes on the same grid in comparison to the conventional approach. Moreover, it
shows a faster convergence in the number of POD modes with respect to the grid
refinement. Using the DEIM approximation of nonlinear functions in combination
with the total reduction, the nonlinear functions corresponding to the ionic
state variables are also approximated besides the nonlinear ionic current in
the monodomain equation. For the current POD-DEIM approach, it appears that the
same number of DEIM interpolation points as the number of POD modes is the
optimal choice regarding stability, accuracy and runtime.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2018-51&engl=0}
}
@inproceedings {INPROC-2018-50,
author = {Steffen Hirschmann and Michael Lahnert and Carolin Schober and Malte Brunn and Miriam Mehl and Dirk Pfl{\"u}ger},
title = {{Load-Balancing and Spatial Adaptivity for Coarse-Grained Molecular Dynamics Applications}},
booktitle = {High Performance Computing in Science and Engineering '18},
editor = {Wolfgang E. Nagel and Dietmar H. Kr{\"o}ner and Michael M. Resch},
publisher = {Springer International Publishing},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {1--510},
type = {Konferenz-Beitrag},
month = {Oktober},
year = {2018},
isbn = {978-3-030-13324-5},
doi = {10.1007/978-3-030-13325-2},
language = {Englisch},
cr-category = {G.1.0 Numerical Analysis General},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2018-50/INPROC-2018-50.pdf},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {We present our approach for a scalable implementation of coupled soft matter
simulations for inhomogeneous applications based on the simulation package
ESPResSo and an extended version of the adaptive grid framework p4est. Our main
contribution in this paper is the development and implementation of a joint
partitioning of two or more distinct octree-based grids based on the concept of
a finest common tree. This concept guarantees that, on all grids, the same
process is responsible for each point in space and, thus, avoids communication
of data in overlapping volumes handled in different partitions. We achieve up
to 85 \% parallel efficiency in a weak scaling setting. Our proposed algorithms
take only a small fraction of the overall runtime of grid adaption.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2018-50&engl=0}
}
@inproceedings {INPROC-2018-09,
author = {Julian Valentin and Dirk Pfl{\"u}ger},
title = {{Fundamental Splines on Sparse Grids and Their Application to Gradient-Based Optimization}},
booktitle = {Sparse Grids and Applications - Miami 2016},
editor = {Jochen Garcke and Dirk Pfl{\"u}ger and Clayton G. Webster and Guannan Zhang},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computational Science and Engineering},
volume = {123},
pages = {229--251},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2018},
doi = {10.1007/978-3-319-75426-0_10},
keywords = {sparse grids; optimization; B-splines},
language = {Englisch},
cr-category = {G.1.6 Numerical Analysis Optimization},
ee = {https://dx.doi.org/10.1007/978-3-319-75426-0_10},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2018-09&engl=0}
}
@inproceedings {INPROC-2018-08,
author = {David Pfander and Gregor Dai{\ss} and Dirk Pfl{\"u}ger and Dominic Marcello and Hartmut Kaiser},
title = {{Accelerating Octo-Tiger: Stellar Mergers on Intel Knights Landing with HPX}},
booktitle = {Proceedings of the 6th International Workshop on OpenCL},
publisher = {ACM},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {1--9},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2018},
language = {Englisch},
cr-category = {D.1 Programming Techniques,
D.3.4 Programming Languages Processors,
G.4 Mathematical Software},
contact = {submitted},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {The optimization of performance of complex simulation codes with high
computational demands, such as Octo-Tiger, is an ongoing challenge. Octo-Tiger
is an astrophysics code simulating the evolution of star systems based on the
fast multipole method on adaptive octrees. It was implemented using high-level
C++ libraries, specifically HPX and Vc, which allows its use on different
hardware platforms. Recently, we have demonstrated excellent scalability in a
distributed setting. In this paper, we study Octo-Tiger{\^a}€™s node-level
performance on an Intel Knights Landing platform. We focus on the fast
multipole method, as it is Octo-Tiger{\^a}€™s computationally most demanding
component. By using HPX and a futurization approach, we can efficiently
traverse the adaptive octrees in parallel. On the core-level, threads process
sub-grids using multiple 743-element stencils. In numerical experiments,
simulating the time evolution of a rotating star on an Intel Xeon Phi 7250
Knights Landing processor, Octo-Tiger shows good parallel efficiency and
achieves up to 408 GFLOPS. This results in a speedup of 2x compared to a
24-core Skylake-SP platform, using the same high-level abstractions.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2018-08&engl=0}
}
@inproceedings {INPROC-2018-07,
author = {David Pfander and Malte Brunn and Dirk Pfl{\"u}ger},
title = {{AutoTuneTMP: Auto-Tuning in C++ With Runtime Template Metaprogramming}},
booktitle = {2018 IEEE International Parallel and Distributed Processing Symposium Workshops (IPDPSW)},
publisher = {IEEE},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {1--10},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2018},
keywords = {auto-tuning; template metaprogramming; just-in-time compilation; performance engineering},
language = {Englisch},
cr-category = {D.3.4 Programming Languages Processors},
contact = {submitted},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2018-07&engl=0}
}
@inproceedings {INPROC-2017-73,
author = {Nehzat Emamy and Maria Luk{\'a}\&\#269;ov{\'a}-Medvid’ov{\'a} and Stefanie Stalter and Peter Virnau and Leonid Yelash},
title = {{Reduced-order hybrid multiscale method combining the Molecular Dynamics and the Discontinuous-Galerkin method}},
booktitle = {Proceedings of VII International Conference on Computational Methods for Coupled Problems in Science and Engineering (Coupled Problems 2017)},
address = {Rhodes Island, Greece},
publisher = {ECCOMAS},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {62--76},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2017},
language = {Englisch},
cr-category = {I.6.0 Simulation and Modeling General},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2017-73&engl=0}
}
@inproceedings {INPROC-2017-71,
author = {Carolin Schober and David Keerl and Martin Lehmann and Miriam Mehl},
title = {{Simulating the Interaction of Electrostatically Charged Particles in the Inflow Area of Cabin Air Filters Using a Fully Coupled System}},
booktitle = {Proceedings of the VII International Conference on Coupled Problems in Science and Engineering},
address = {Barcelona, Spain},
publisher = {CIMNE},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {77--88},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2017},
language = {Englisch},
cr-category = {J.2 Physical Sciences and Engineering},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2017-71/INPROC-2017-71.pdf},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Cabin air filters are applied to prevent small particles such as pollen, fine
dust and soot amongst others from being transferred into the interior (cabin)
of a vehicle. The filter media often make use of the so called electret effect
as means for achieving high filtration efficiency at low pressure drop.
Thereby, electrostatic filtration effects are supplemented to the well-known
mechanical collection mechanisms (such as inertia, diffusion,...). Besides the
interference of several fiber-particle interactions (Coulombic
attraction/repulsion, induced dipolar forces, image charge effects)
particle-particle interactions potentially play an important role. However,
this effect is completely neglected in previous research studies due to the
high degree of complexity [1]. In this work, we present a detailed
investigation of the particle behaviour in the inflow area and transition area
to the filter media. For a precise description of the underlying physical
procedures the simulation is based on a four-way coupling. This approach takes
into account the reciprocal influence between the fluid flow and the particle
motion as well as the interactions between single electrostatically charged
particles. The software package ESPResSo [2] used in this work is based on a
molecular dynamic approach and provides the advantage of efficient algorithms
for the modelling of electrostatic interactions. In order to emulate the air
flow, the molecular dynamic simulation is coupled with a Lattice-Boltzmann
fluid. The presented talk focuses on the influence of the particle-particle
interactions on the filtration performance. It is elaborated whether the fully
coupled system is necessary in order to reflect reality more closely or the
simulation can be simplified to reduce the degree of complexity and thus the
computational costs.
REFERENCES [1] S. Rief, A. Latz, A. Wiegmann, {\^a}€œComputer simulation of Air
Filtration including electric surface charges in three-dimensional fibrous
micro structures{\^a}€, Filtration 6.2, (2006). [2] A. Arnold, O. Lenz, S.
Kesselheim, R. Weeber, F. Fahrenberger, D. Roehm, P. Ko{\AA}¡ovan and C. Holm,
{\^a}€œESPResSo 3.1: Molecular Dynamic Software for Coarse-Grained Models{\^a}€,
Lecture Notes in Computational Science and Engineering, (2013).},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2017-71&engl=0}
}
@inproceedings {INPROC-2017-62,
author = {Andreas Mang and Sameer Tarakan and Amir Gholami and Naveen Himthani and Subramanian and Shanshank and James Levitt and Muneeza Azmat and Klaudius Scheufele and Miriam Mehl and Christos Davatzikos and Bill Bart and George Biros},
title = {{SIBIA-GlS: Scalable Biophysics-Based Image Analysis for Glioma Segmentation}},
booktitle = {The multimodal brain tumor image segmentation benchmark (BRATS), MICCAI},
publisher = {-},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {202--209},
type = {Konferenz-Beitrag},
month = {Juli},
year = {2017},
language = {Englisch},
cr-category = {G.1.6 Numerical Analysis Optimization,
G.1.8 Partial Differential Equations,
J.3 Life and Medical Sciences},
ee = {https://www.cbica.upenn.edu/sbia/Spyridon.Bakas/MICCAI_BraTS/MICCAI_BraTS_2017_proceedings_shortPapers.pdf},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2017-62&engl=0}
}
@inproceedings {INPROC-2017-61,
author = {Amir Gholami and Andreas Mang and Klaudius Scheufele and Christos Davatzikos and Miriam Mehl and George Biros},
title = {{A Framework for Scalable Biophysics-based Image Analysis}},
booktitle = {Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis, SC17},
address = {New York, NY, USA},
publisher = {ACM},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {1--13},
type = {Konferenz-Beitrag},
month = {November},
year = {2017},
doi = {10.1145/3126908.3126930},
isbn = {978-1-4503-5114-0},
keywords = {bio-physics based image analysis; scalable image registration},
language = {Englisch},
cr-category = {G.1.6 Numerical Analysis Optimization,
G.1.8 Partial Differential Equations,
J.3 Life and Medical Sciences},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2017-61/INPROC-2017-61.pdf,
https://dl.acm.org/citation.cfm?doid=3126908.3126930},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2017-61&engl=0}
}
@inproceedings {INPROC-2017-37,
author = {Benjamin Peherstorfer and Dirk Pfl{\"u}ger and Hans-Joachim Bungartz},
title = {{Density Estimation with Adaptive Sparse Grids for Large Data Sets}},
booktitle = {Proceedings of the 2014 SIAM International Conference on Data Mining},
publisher = {SIAM},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {443--451},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2017},
doi = {10.1137/1.9781611973440.51},
keywords = {sparse grids; density estimation; big data},
language = {Englisch},
cr-category = {I.2 Artificial Intelligence,
I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Nonparametric density estimation is a fundamental problem of statistics and
data mining. Even though kernel density estimation is the most widely used
method, its performance highly depends on the choice of the kernel bandwidth,
and it can become computationally expensive for large data sets. We present an
adaptive sparse-grid-based density estimation method which discretizes the
estimated density function on basis functions centered at grid points rather
than on kernels centered at the data points. Thus, the costs of evaluating the
estimated density function are independent from the number of data points. We
give details on how to estimate density functions on sparse grids and develop a
cross validation technique for the parameter selection. We show numerical
results to confirm that our sparse-grid-based method is well-suited for large
data sets, and, finally, employ our method for the classification of
astronomical objects to demonstrate that it is competitive to current
kernel-based density estimation approaches with respect to classification
accuracy and runtime.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2017-37&engl=0}
}
@inproceedings {INPROC-2017-35,
author = {Florian Lindner and Miriam Mehl and Benjamin Uekermann},
title = {{Radial Basis Function Interpolation for Black-Box Multi-Physics Simulations}},
booktitle = {Proceedings of the VII International Conference on Coupled Problems in Science and Engineering},
editor = {International Center for Numerical Methods in Engineering (CIMNE)},
address = {Barcelona, Spain},
publisher = {CIMNE},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {50--61},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2017},
isbn = {978-84-946909-2-1},
language = {Englisch},
cr-category = {G.1.1 Numerical Analysis Interpolation},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2017-35/INPROC-2017-35.pdf},
contact = {florian.lindner@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2017-35&engl=0}
}
@inproceedings {INPROC-2017-31,
author = {Mario Heene and Alfredo Parra Hinojosa and Hans-Joachim Bungartz and Dirk Pfl{\"u}ger},
title = {{A Massively-Parallel, Fault-Tolerant Solver for High-Dimensional PDEs}},
booktitle = {Euro-Par 2016: Parallel Processing Workshops},
editor = {F. Desprez and Et al.},
address = {Cham},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computer Science (LNCS)},
volume = {10104},
pages = {635--647},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2017},
doi = {10.1007/978-3-319-58943-5_51},
language = {Englisch},
cr-category = {G.4 Mathematical Software},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {We investigate the effect of hard faults on a massively-parallel implementation
of the Sparse Grid Combination Technique (SGCT), an efficient numerical
approach for the solution of high-dimensional time-dependent PDEs. The SGCT
allows us to increase the spatial resolution of a solver to a level that is out
of scope with classical discretization schemes due to the curse of
dimensionality. We exploit the inherent data redundancy of this algorithm to
obtain a scalable and fault-tolerant implementation without the need of
checkpointing or process replication. It is a lossy approach that can guarantee
convergence for a large number of faults and a wide range of applications. We
present first results using our fault simulation framework {\^a}€“ and the first
convergence and scalability results with simulated faults and algorithm-based
fault tolerance for PDEs in more than three dimensions.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2017-31&engl=0}
}
@inproceedings {INPROC-2016-59,
author = {Dirk Pfl{\"u}ger and David Pfander},
title = {{Computational Efficiency vs. Maintainability and Portability. Experiences with the Sparse Grid Code SG++}},
booktitle = {2016 Fourth International Workshop on Software Engineering for High Performance Computing in Computational Science and Engineering (SE-HPCCSE)},
address = {Salt Lake City, UT, USA},
publisher = {IEEE},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {17--25},
type = {Konferenz-Beitrag},
month = {November},
year = {2016},
isbn = {978-1-5090-5224-0},
keywords = {software maintenance; software quality; computational efficiency; computational maintainability; computational portability; design decisions; software quality; sparse grid code SG++; Computational modeling; Hardware; Programming; Software engineering; Software quality; Usability},
language = {Deutsch},
cr-category = {G.1.0 Numerical Analysis General,
D.2.3 Software Engineering Coding Tools and Techniques,
D.2.11 Software Engineering Software Architectures,
D.2.13 Software Engineering Reusable Software},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2016-59&engl=0}
}
@inproceedings {INPROC-2016-57,
author = {Michael Lahnert and Takayuki Aoki and Carsten Burstedde and Miriam Mehl},
title = {{Minimally-Invasive Integration of P4est in Espresso for Adaptive Lattice-Boltzmann}},
booktitle = {The 30th Computational Fluid Dynamics Symposium ; Tokyo, Japan, December 12--14, 2016.},
publisher = {Japan Society of Fluid Mechanics},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {1--7},
type = {Konferenz-Beitrag},
month = {Dezember},
year = {2016},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2016-57&engl=0}
}
@inproceedings {INPROC-2016-56,
author = {David Pfander and Alexander Heinecke and Dirk Pfl{\"u}ger},
title = {{A New Subspace-Based Algorithm for Efficient Spatially Adaptive Sparse Grid Regression, Classification and Multi-evaluation}},
booktitle = {Sparse Grids and Applications - Stuttgart 2014},
editor = {Jochen Garcke and Dirk Pfl{\"u}ger},
publisher = {Springer International Publishing},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computational Science and Engineering},
volume = {109},
pages = {221--246},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2016},
keywords = {Sparse Grids; Performance Optimization; Adaptivity; High-Performance Computing},
language = {Deutsch},
cr-category = {G.4 Mathematical Software,
D.1.3 Concurrent Programming},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2016-56&engl=0}
}
@inproceedings {INPROC-2016-53,
author = {Dirk Pfl{\"u}ger and Miriam Mehl and Julian Valentin and Florian Lindner and David Pfander and Stefan Wagner and Daniel Graziotin and Yang Wang},
title = {{The Scalability-Efficiency/Maintainability-Portability Trade-Off in Simulation Software Engineering: Examples and a Preliminary Systematic Literature Review}},
booktitle = {Proceedings of 2016 Fourth International Workshop on Software Engineering for High Performance Computing in Computational Science and Engineering (SE-HPCCSE 2016), held in conjunction with SC16, Salt Lake City, Utah},
publisher = {IEEE Computer Society; ACM},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {26--34},
type = {Workshop-Beitrag},
month = {November},
year = {2016},
doi = {10.1109/SE-HPCCSE.2016.008},
keywords = {digital simulation; software maintenance; software portability; SLR; SSE; complex software; dynamic construction process; maintainability-portability trade-off; scalability-efficiency trade-off; simulation software engineering; systematic literature review; Computational modeling; Hardware; Mathematical model; Numerical models; Scalability; Software; Software engineering},
language = {Englisch},
cr-category = {D.2.0 Software Engineering General},
ee = {https://dx.doi.org/10.1109/SE-HPCCSE.2016.008},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2016-53&engl=0}
}
@inproceedings {INPROC-2016-51,
author = {Mario Heene and Dirk Pfl{\"u}ger},
title = {{Scalable Algorithms for the Solution of Higher-Dimensional PDEs}},
booktitle = {Software for Exascale Computing - SPPEXA 2013-2015},
editor = {Hans-Joachim. Bungartz and Neumann Philipp and Nagel Wolfgang},
address = {Cham},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {LNCSE},
volume = {113},
pages = {165--186},
type = {Konferenz-Beitrag},
month = {September},
year = {2016},
doi = {10.1007/978-3-319-40528-5_8},
language = {Deutsch},
cr-category = {G.4 Mathematical Software},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2016-51&engl=0}
}
@inproceedings {INPROC-2016-50,
author = {Markus Hegland and Brendan Harding and Christoph Kowitz and Dirk Pfl{\"u}ger and Peter Strazdins},
title = {{Recent Developments in the Theory and Application of the Sparse Grid Combination Technique}},
booktitle = {Software for Exascale Computing - SPPEXA 2013-2015},
editor = {Hans-Joachim Bungartz and Philipp Neumann and Wolfgang E. Nagel},
publisher = {Springer International Publishing},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {143--163},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2016},
isbn = {978-3-319-40528-5},
doi = {10.1007/978-3-319-40528-5_7},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling,
B.8.1 Reliability, Testing, and Fault-Tolerance},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Substantial modifications of both the choice of the grids, the combination
coefficients, the parallel data structures and the algorithms used for the
combination technique lead to numerical methods which are scalable. This is
demonstrated by the provision of error and complexity bounds and in performance
studies based on a state of the art code for the solution of the gyrokinetic
equations of plasma physics. The key ideas for a new fault-tolerant combination
technique are mentioned. New algorithms for both initial- and eigenvalue
problems have been developed and are shown to have good performance.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2016-50&engl=0}
}
@inproceedings {INPROC-2016-45,
author = {Steffen Hirschmann and Dirk Pfl{\"u}ger and Colin W. Glass},
title = {{Towards Understanding Optimal Load-Balancing of Heterogeneous Short-Range Molecular Dynamics}},
booktitle = {2016 IEEE 23rd International Conference on High Performance Computing Workshops (HiPCW)},
publisher = {IEEE},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {130--141},
type = {Konferenz-Beitrag},
month = {Dezember},
year = {2016},
doi = {10.1109/HiPCW.2016.027},
language = {Englisch},
cr-category = {G.1.6 Numerical Analysis Optimization},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2016-45/INPROC-2016-45.pdf},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2016-45&engl=0}
}
@inproceedings {INPROC-2016-43,
author = {Arash Bakhtiari and Dhairya Malhotra and Amir Raoofy and Miriam Mehl and Hans-Joachim Bungartz and George Biros},
title = {{A Parallel Arbitrary-order Accurate AMR Algorithm for the Scalar Advection-diffusion Equation}},
booktitle = {Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis},
address = {Piscataway, NJ, USA},
publisher = {IEEE Press},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {1--12},
type = {Konferenz-Beitrag},
month = {November},
year = {2016},
isbn = {978-1-4673-8815-3},
keywords = {adaptive mesh refinement, semi-Lagrangian, fast multipole, parallel computing},
language = {Englisch},
cr-category = {J.0 Computer Applications General},
ee = {http://dl.acm.org/citation.cfm?id=3014904.3014963},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {We present a numerical method for solving the scalar advection-diffusion
equation using adaptive mesh re- finement. Our solver has three unique
characteristics: (1) it supports arbitrary-order accuracy in space; (2) it
allows different discretizations for the velocity and scalar advected quantity;
and (3) it combines the method of characteristics with an integral equation
formulation. In particular, our solver is based on a second-order accurate,
unconditionally stable, semi-Lagrangian scheme combined with a
spatially-adaptive Chebyshev octree for discretization. We study the
convergence, single-node perfor- mance, strong scaling, and weak scaling of our
scheme for several challenging flows that cannot be resolved efficiently
without using high-order accurate discretizations. For example, we consider
problems for which switching from 4th order to 14th order approximation results
in two orders of magnitude speedups for a fixed accuracy. For our largest run,
we solve a problem with one billion unknowns on a tree with maximum depth equal
to 10 and 14th-order elements on 16,384 cores on the {\^a}€STAMPEDE{\^a}€ system at
the Texas Advanced Computing Center.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2016-43&engl=0}
}
@inproceedings {INPROC-2016-20,
author = {Michael Lahnert and Carsten Burstedde and Christian Holm and Miriam Mehl and Georg Rempfer and Florian Weik},
title = {{Towards Lattice-Boltzmann on Dynamically Adaptive Grids -- Minimally-Invasive Grid Exchange in ESPResSo}},
booktitle = {ECCOMAS Congress 2016, VII European Congress on Computational Methods in Applied Sciences and Engineering},
editor = {M. Papadrakakis and V. Papadopoulos and G. Stefanou and V. Plevris},
publisher = {ECCOMAS},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {1--25},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2016},
language = {Englisch},
cr-category = {G.1.8 Partial Differential Equations},
ee = {https://www.eccomas2016.org/proceedings/pdf/4659.pdf},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {We present the minimally-invasive exchange of the regular Cartesian grid in the
lattice-Boltzmann solver of ESPResSo by a dynamically-adaptive octree grid.
Octree grids are favoured by computer scientists over other grid types as they
are very memory-efficient. In addition, they represent a natural generalisation
of regular Cartesian grids, such that most discretisation details of a regular
grid solver can be maintained. Optimised codes, however, require a special
tree-oriented grid traversal, which typically conflicts with existing
simulation codes using various iterators, some for only parts of the grid,
e.g., boundaries. ESPResSo is a large software package developed for
soft-matter simulations involving fluid flow, electrostatic, and electrokinetic
effects, and molecular dynamics. The currently used regular Cartesian grid
hinders the simulation of realistic domain sizes and significant time periods,
a problem that can be solved using grid adaptivity. In a first step, we focus
on the lattice-Boltzmann flow solver in ESPResSo. p4est is a grid framework,
that already provides dynamically adaptive quadtree and octree grids together
with high-level interfaces for flexible grid traversals with direct neighbour
access in all grid components. In this paper, we first describe extensions of
p4est that were necessary to fulfill certain application requirements. The
second part of our work consists of the minimally-invasive changes in ESPResSo
preserving the expertise accumulated in the software's implementation over
years. Our numerical results demonstrate physical correctness of the
implementation, good parallel scalability and low overhead of the dynamical
grid adaptivity. These are prerequisites to actually profit from grid
adaptivity in terms of being able to simulate larger domains over longer time
periods with limited computational resources. Thus, the current status forms a
solid basis for further steps such as the development of refinement criteria,
the setup of more realistic application scenarios, and a GPU implementation.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2016-20&engl=0}
}
@inproceedings {INPROC-2016-12,
author = {Julian Valentin and Dirk Pfl{\"u}ger},
title = {{Hierarchical Gradient-Based Optimization with B-Splines on Sparse Grids}},
booktitle = {Sparse Grids and Applications - Stuttgart 2014},
editor = {Jochen Garcke and Dirk Pfl{\"u}ger},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computational Science and Engineering},
volume = {109},
pages = {315--336},
type = {Konferenz-Beitrag},
month = {M{\"a}rz},
year = {2016},
doi = {10.1007/978-3-319-28262-6_13},
keywords = {sparse grids; optimization; B-splines},
language = {Englisch},
cr-category = {G.1.6 Numerical Analysis Optimization},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2016-12/INPROC-2016-12.pdf,
https://dx.doi.org/10.1007/978-3-319-28262-6_13},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Optimization algorithms typically perform a series of function evaluations to
find an approximation of an optimal point of the objective function.
Evaluations can be expensive, e.g., if they depend on the results of a complex
simulation. When dealing with higher-dimensional functions, the curse of
dimensionality increases the difficulty of the problem rapidly and prohibits a
regular sampling. Instead of directly optimizing the objective function, we
replace it with a sparse grid interpolant, saving valuable function
evaluations. We generalize the standard piecewise linear basis to hierarchical
B-splines, making the sparse grid surrogate smooth enough to enable
gradient-based optimization methods. Also, we use an uncommon refinement
criterion due to Novak and Ritter to generate an appropriate sparse grid
adaptively. Finally, we evaluate the new method for various artificial and
real-world examples.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2016-12&engl=0}
}
@inproceedings {INPROC-2015-63,
author = {Nehzat Emamy and Martin Karcher and Roozbeh Mousavi and Martin Oberlack},
title = {{A high-order fully coupled electro-fluid-dynamics solver for multiphase flow simulations}},
booktitle = {VI International Conference on Computational Methods for Coupled Problems in Science and Engineering},
address = {San Servolo Island, Venice, Greece},
publisher = {ECCOMAS},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {753--759},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2015},
language = {Englisch},
cr-category = {I.6.0 Simulation and Modeling General},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2015-63&engl=0}
}
@inproceedings {INPROC-2015-61,
author = {Stefan Wagner and Dirk Pfl{\"u}ger and Miriam Mehl},
title = {{Simulation Software Engineering: Experiences and Challenges}},
booktitle = {Proceedings of the 3rd International Workshop on Software Engineering for High Performance Computing in Computational Science and Engineering},
publisher = {ACM},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {SE-HPCCSE '15},
pages = {1--4},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2015},
doi = {10.1145/2830168.2830171},
isbn = {978-1-4503-4012-0},
keywords = {simulation software, software engineering},
language = {Deutsch},
cr-category = {D.2.0 Software Engineering General},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme;
Universit{\"a}t Stuttgart, Institut f{\"u}r Softwaretechnologie, Software Engineering},
abstract = {Using software for large-scale simulations has become an important research
method in many disciplines. With increasingly complex simulations, simulation
software becomes a valuable assest. Yet, the quality of many simulation codes
is worrying. In this paper, we want to collect and structure the challenges for
a systematic simulation software engineering as a reference and the basis for
further research. We describe our own experiences with developing simulation
software and collaborating with non-computer-scientists. We complement our
experienced challenges with a brief literature review. We structured the
challenges for simulation software engineering into six areas: motivation and
recognition; education and training; developer turnover; software length of
life; verification, validation and debugging; and efficiency vs.
maintainability. Overcoming these challenges needs efforts from research
agencies, scientific computing researchers as well as software engineering
researchers.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2015-61&engl=0}
}
@inproceedings {INPROC-2015-58,
author = {Mario Heene and Dirk Pfl{\"u}ger},
title = {{Efficient and scalable distributed-memory hierarchization algorithms for the sparse grid combination technique}},
booktitle = {Parallel Computing: On the Road to Exascale},
publisher = {IOS Press},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Advances in Parallel Computing},
volume = {27},
pages = {339--348},
type = {Konferenz-Beitrag},
month = {April},
year = {2015},
doi = {10.3233/978-1-61499-621-7-339},
keywords = {high-performance computing; sparse grids; plasma physics; gyrokinetics},
language = {Englisch},
cr-category = {G.4 Mathematical Software},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Finding solutions to higher dimensional problems, such as the simulation of
plasma turbulence in a fusion device as described by the five-dimensional
gyrokinetic equations, is a grand challenge facing current and future high
performance computing (HPC). The sparse grid combination technique is a
promising approach to the solution of these problems on large scale distributed
memory systems. The combination technique numerically decomposes a single large
problem into multiple moderately sized partial problems that can be computed in
parallel, independently and asynchronously of each other. The ability to
efficiently combine the individual partial solutions to a common sparse grid
solution is a key consideration to the overall performance of large scale
computations with the combination technique. This requires a transfer of each
partial solution from the nodal basis representation into the hierarchical
basis representation by hierarchization. In this work we will present a new,
efficient and scalable algorithm for the hierarchization of partial solutions
that are distributed over multiple process groups of an HPC system.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2015-58&engl=0}
}
@inproceedings {INPROC-2015-32,
author = {Alfredo Parra Hinojosa and Christoph Kowitz and Mario Heene and Dirk Pfl{\"u}ger and Hans-Joachim Bungartz},
title = {{Towards a fault-tolerant, scalable implementation of GENE}},
booktitle = {Proceedings of ICCE 2014},
publisher = {Springer-Verlag},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computational Science and Engineering},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2015},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2015-32&engl=0}
}
@inproceedings {INPROC-2015-29,
author = {Florian Lindner and Miriam Mehl and Klaudius Scheufele and Benjamin Uekermann},
title = {{A Comparison of various Quasi-Newton Schemes for Partitioned Fluid-Structure Interaction}},
booktitle = {Coupled Problems},
publisher = {ECCOMAS},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2015},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2015-29&engl=0}
}
@inproceedings {INPROC-2014-96,
author = {Steffen Hirschmann},
title = {{GPU-Based Regression Analysis on Sparse Grids}},
booktitle = {Informatik 2014, Big Data - Komplexit{\"a}t meistern},
editor = {E. Pl{\"o}dereder and L. Grunske and E. Schneider and D. Ull},
address = {Bonn},
publisher = {Gesellschaft f{\"u}r Informatik e.V.},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {LNI},
volume = {232},
pages = {2425--2436},
type = {Konferenz-Beitrag},
month = {September},
year = {2014},
language = {Englisch},
cr-category = {G.1.3 Numerical Linear Algebra},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-96&engl=0}
}
@inproceedings {INPROC-2014-93,
author = {Fabian Franzelin and Patrick Diehl and Dirk Pfl{\"u}ger and Marc Alexander Schweitzer},
title = {{Non-intrusive uncertainty quantification with sparse grids for multivariate peridynamic simulations}},
booktitle = {Meshfree Methods for Partial Differential Equations VII},
editor = {Michael Griebel and Marc Alexander Schweitzer},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computational Science and Engineering},
volume = {100},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2014},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-93&engl=0}
}
@inproceedings {INPROC-2014-92,
author = {Gerrit Buse and Dirk Pfl{\"u}ger and Riko Jacob},
title = {{Efficient Pseudorecursive Evaluation Schemes for Non-Adaptive Sparse Grids}},
booktitle = {Sparse Grids and Applications - Munich 2012},
editor = {Jochen Garcke and Dirk Pfl{\"u}ger},
publisher = {Springer International Publishing},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computational Science and Engineering},
volume = {97},
pages = {1--27},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2014},
isbn = {9783319045368},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-92&engl=0}
}
@inproceedings {INPROC-2014-91,
author = {Benjamin Peherstorfer and Fabian Franzelin and Dirk Pfl{\"u}ger and Hans-Joachim Bungartz},
title = {{Classification with Probability Density Estimation on Sparse Grids}},
booktitle = {Sparse Grids and Applications - Munich 2012},
editor = {Jochen Garcke and Dirk Pfl{\"u}ger},
publisher = {Springer International Publishing},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computational Science and Engineering},
volume = {97},
pages = {255--270},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2014},
isbn = {9783319045368},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-91&engl=0}
}
@inproceedings {INPROC-2014-90,
author = {Christoph Kowitz and Markus Hegland},
title = {{An Opticom Method for Computing Eigenpairs}},
booktitle = {Sparse Grids and Applications - Munich 2012},
editor = {Jochen Garcke and Dirk Pfl{\"u}ger},
publisher = {Springer International Publishing},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computational Science and Engineering},
volume = {97},
pages = {239--253},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2014},
isbn = {9781319045368},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-90&engl=0}
}
@inproceedings {INPROC-2014-89,
author = {Valeriy Khakhutskyy and Dirk Pfl{\"u}ger},
title = {{Alternating Direction Method of Multipliers for Hierarchical Basis Approximators}},
booktitle = {Sparse Grids and Applications - Munich 2012},
editor = {Jochen Garcke and Dirk Pfl{\"u}ger},
publisher = {Springer International Publishing},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computational Science and Engineering},
volume = {97},
pages = {221--238},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2014},
isbn = {9783319045368},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-89&engl=0}
}
@inproceedings {INPROC-2014-88,
author = {Valeriy Khakhutskyy and Dirk Pfl{\"u}ger and Markus Hegland},
title = {{Scalability and Fault Tolerance of the Alternating Direction Method of Multipliers for Sparse Grids}},
booktitle = {Parallel Computing: Accelerating Computational Science and Engineering (CSE)},
editor = {Michael Bader and Hans-Joachim Bungartz and A. Bode and M Gerndt and G.R. Joubert},
address = {Amsterdam},
publisher = {IOS Press},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Advances in Parallel Computing},
volume = {25},
pages = {603--612},
type = {Konferenz-Beitrag},
month = {M{\"a}rz},
year = {2014},
isbn = {978-1-61499-3},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-88&engl=0}
}
@inproceedings {INPROC-2014-87,
author = {Mario Heene and Christoph Kowitz and Dirk Pfl{\"u}ger},
title = {{Load Balancing for Massively Parallel Computations with the Sparse Grid Combination Technique}},
booktitle = {Parallel Computing: Accelerating Computational Science and Engineering (CSE)},
editor = {Michael Bader and Hans-Joachim Bungartz and A. Bode and M Gerndt and G.R. Joubert},
address = {Amsterdam},
publisher = {IOS Press},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Advances in Parallel Computing},
volume = {25},
pages = {574--583},
type = {Konferenz-Beitrag},
month = {M{\"a}rz},
year = {2014},
isbn = {978-1-61499-3},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-87&engl=0}
}
@inproceedings {INPROC-2014-86,
author = {Philipp Hupp and Riko Jacob and Mario Heene and Dirk Pfl{\"u}ger and Markus Hegland},
title = {{Global Communication Schemes for the Sparse Grid Combination Technique}},
booktitle = {Parallel Computing: Accelerating Computational Science and Engineering (CSE)},
editor = {Michael Bader and Hans-Joachim Bungartz and A. Bode and M Gerndt and G.R. Joubert},
address = {Amsterdam},
publisher = {IOS Press},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Advances in Parallel Computing},
volume = {25},
pages = {564--573},
type = {Konferenz-Beitrag},
month = {M{\"a}rz},
year = {2014},
isbn = {978-1-61499-3},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-86&engl=0}
}
@inproceedings {INPROC-2014-85,
author = {Dirk Pfl{\"u}ger and Hans-Joachim Bungartz and Michael Griebel and Frank Jenko and Tilman Dannert and Mario Heene and Alfredo Parra Hinojosa and Christoph Kowitz and Peter Zaspel},
title = {{EXAHD: An Exa-Scalable Two-Level Sparse Grid Approach for Higher-Dimensional Problems in Plasma Physics and Beyond}},
booktitle = {Euro-Par 2014: Parallel Processing Workshops},
publisher = {Springer-Verlag},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computer Science},
type = {Konferenz-Beitrag},
month = {September},
year = {2014},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-85&engl=0}
}
@inproceedings {INPROC-2014-84,
author = {Benjamin Uekermann and Juan Carlos Cajas and Bernhard Gatzhammer and Guillaume Houzeaux and Miriam Mehl and Mariano Vazquez},
title = {{Towards Partitioned Fluid-Structure Interaction on Massively Parallel Systems}},
booktitle = {Proceedings of WCCM XI / ECCM V / ECFD VI},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Juli},
year = {2014},
language = {Deutsch},
cr-category = {J.2 Physical Sciences and Engineering},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-84&engl=0}
}
@inproceedings {INPROC-2014-83,
author = {Benjamin Uekermann and Bernhard Gatzhammer and Miriam Mehl},
title = {{Coupling Algorithms for Partitioned Multi-Physics Simulations}},
booktitle = {Proceedings of the Informatik 2014 Conference},
publisher = {GI},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {September},
year = {2014},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-83&engl=0}
}
@inproceedings {INPROC-2013-66,
author = {Benjamin Peherstorfer and Stefan Zimmer and Hans-Joachim Bungartz},
title = {{Model Reduction with the Reduced Basis Method and Sparse Grids}},
booktitle = {Sparse Grids and Applications 2011},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computational Science and Engineering},
volume = {88},
pages = {223--242},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2013},
language = {Deutsch},
cr-category = {G.1.8 Partial Differential Equations},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {The reduced basis (RB) method has become increasingly popular for problems
where PDEs have to be solved for varying parameters \$$\backslash$mu $\backslash$in D\$ in order to
evaluate a parameter-dependent output function \$s : D $\backslash$to IR\$. The idea of the
RB method is to compute the solution of the PDE for varying parameters in a
problem-specific low-dimensional subspace \$X\_N\$ of the high-dimensional finite
element space \$X^{$\backslash$mathcal{N}}\$ . We will discuss how sparse grids can be
employed within the RB method or to circumvent the RB method altogether. One
drawback of the RB method is that the solvers of the governing equations have
to be modified and tailored to the reduced basis. This is a severe limitation
of the RB method. Our approach interpolates the output function s on a sparse
grid. Thus, we compute the respond to a new parameter \$$\backslash$mu $\backslash$in D\$ with a simple
function evaluation. No modification or in-depth knowledge of the governing
equations and its solver are necessary. We present numerical examples to show
that we obtain not only competitive results with the interpolation on sparse
grids but that we can even be better than the RB approximation if we are only
interested in a rough but very fast approximation.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2013-66&engl=0}
}
@inproceedings {INPROC-2013-65,
author = {Alexander Heinecke and Dirk Pfl{\"u}ger and Dmitry Budnikov and Michael Klemm and Arik Narkis and Maxim Shevtsov and Ayal Zaks},
title = {{Demonstrating Performance Portability of A Custom OpenCL Data Mining Application to the Intel(R) Xeon Phi(TM) Coprocessor}},
booktitle = {International Workshop on OpenCL Proceedings 2013},
address = {Georgia, Tech},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2013},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2013-65&engl=0}
}
@inproceedings {INPROC-2013-64,
author = {Benjamin Peherstorfer and Julius Adorf and Dirk Pfl{\"u}ger and Hans-Joachim Bungartz},
title = {{Image Segmentation with Adaptive Sparse Grids}},
booktitle = {Proceedings of 26th Australasian Joint Conference on Artificial Intelligence},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {September},
year = {2013},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2013-64&engl=0}
}
@inproceedings {INPROC-2013-63,
author = {Benjamin Uekermann and Hans-Joachim Bungartz and Bernhard Gatzhammer and Miriam Mehl},
title = {{A Parallel, Black-Box Coupling for Fluid-Structure Interaction}},
booktitle = {Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2013},
editor = {Sergio Idelsohn and Manolis Papadrakakis and Bernhard Schrefler},
address = {Stanta, Eulalia; Ibiza, Spain},
publisher = {//congress.cimne.com/coupled2013/proceedings/)},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2013},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2013-63&engl=0}
}
@inproceedings {INPROC-2012-62,
author = {Alexander Heinecke and Michael Klemm and Hans Pabst and Dirk Pfl{\"u}ger},
title = {{Towards high-performance implementations of a custom HPC kernel using Intel(R) Array Building Blocks}},
booktitle = {Facing the Multicore-Challenge II},
address = {Berlin},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computer Science},
volume = {7174},
pages = {36--47},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2012},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-62&engl=0}
}
@inproceedings {INPROC-2012-61,
author = {Alexander Heinecke and Michael Klemm and Dirk Pfl{\"u}ger and Arndt Bode and Hans-Joachim Bungartz},
title = {{Extending a Highly Parallel Data Mining Algorithm to the Intel(R) Many Integrated Core Architecture}},
booktitle = {Euro-Par 2011: Parallel Processing Workshops: Proceedings of the 4th Workshop on UnConventional High Performance Computing 2011 (UCHPC 2011)},
address = {Bordeaux, France},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computer Science},
volume = {7156/2012},
pages = {375--384},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2012},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-61&engl=0}
}
@inproceedings {INPROC-2012-60,
author = {Daniel Butnaru and Gerrit Buse and Dirk Pfl{\"u}ger},
title = {{A Parallel and Distributed Surrogate Model Implementation for Computational Steering}},
booktitle = {Proceeding of the 11th International Symposium on Parallel and Distributed Computing - ISPDC 2012},
address = {Munich},
publisher = {IEEE},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2012},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-60&engl=0}
}
@inproceedings {INPROC-2012-59,
author = {Murarasu Alin and Buse Gerrit and Weidendorfer Josef and Dirk Pfl{\"u}ger and Arndt Bode},
title = {{fastsg: A Fast Routines Library for Sparse Grids}},
booktitle = {Proceedings of the International Conference on Computational Science, ICCS 2012},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Procedia Computer Science},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2012},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-59&engl=0}
}
@inproceedings {INPROC-2012-58,
author = {Gerrit Buse and Riko Jacob and Dirk Pfl{\"u}ger and Alin Murarasu},
title = {{A Non-static Data Layout Enhancing Parallelism and Vectorization in Sparse Grid Algorithms}},
booktitle = {Proceeding of the 11th International Symposium on Parallel and Distributed Computing - ISPDC 2012},
address = {Munich},
publisher = {IEEE},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2012},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-58&engl=0}
}
@inproceedings {INPROC-2012-57,
author = {Alexander Heinecke and Benjamin Peherstorfer and Dirk Pfl{\"u}ger and Zhongwen Song},
title = {{Sparse Grid Classifiers as Base Learners for AdaBoost}},
booktitle = {2012 International Conference on High Performance Computing and Simulation (HPCS),},
address = {Madrid},
publisher = {IEEE},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {161--166},
type = {Konferenz-Beitrag},
month = {Juli},
year = {2012},
isbn = {9781467323598},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-57&engl=0}
}
@inproceedings {INPROC-2012-56,
author = {Janos Benk and Dirk Pfl{\"u}ger},
title = {{Hybrid Parallel Solutions of the Black-Scholes PDE with the Truncated Combination Technique}},
booktitle = {Proceedings of the HPCS conference},
address = {Madrid},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Juli},
year = {2012},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-56&engl=0}
}
@inproceedings {INPROC-2012-55,
author = {Christoph Kowitz and Dirk Pfl{\"u}ger and Frank Jenko and Markus Hegland},
title = {{The Combination Technique for the Initial Value Problem in Linear Gyrokinetics}},
booktitle = {Sparse Grids and Applications},
editor = {Michael Griebel and Jochen Garcke},
address = {Heidelberg},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computational Science and Engineering},
volume = {88},
pages = {205--222},
type = {Konferenz-Beitrag},
month = {Oktober},
year = {2012},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-55&engl=0}
}
@inproceedings {INPROC-2012-54,
author = {Dirk Pfl{\"u}ger},
title = {{Spatially Adaptive Refinement}},
booktitle = {Sparse Grids and Applications},
editor = {Jochen Garcke and Michael Griebel},
address = {Berlin, Heidelberg,},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computational Science and Engineering},
pages = {243--262},
type = {Konferenz-Beitrag},
month = {Oktober},
year = {2012},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-54&engl=0}
}
@inproceedings {INPROC-2012-53,
author = {Benjamin Peherstorfer and Dirk Pfl{\"u}ger and Hans-Joachim Bungartz},
title = {{Clustering Based on Density Estimation with Sparse Grids}},
booktitle = {KI 2012: Advances in Artificial Intelligence},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computer Science},
volume = {7526},
type = {Konferenz-Beitrag},
month = {Oktober},
year = {2012},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-53&engl=0}
}
@inproceedings {INPROC-2012-52,
author = {Daniel Butnaru and Benjamin Peherstorfer and Dirk Pfl{\"u}ger and Hans-Joachim Bungartz},
title = {{Fast Insight into High-Dimensional Parametrized Simulation Data}},
booktitle = {11th International Conference on Machine Learning and Applications (ICMLA)},
address = {Boca Raton, Florida},
publisher = {IEEE},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Dezember},
year = {2012},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-52&engl=0}
}
@inproceedings {INPROC-2012-51,
author = {Janos Benk and Michael Ulbrich and Miriam Mehl},
title = {{The Nitsche Method of the Navier-Stokes Equations for Immersed and Moving Boundaries}},
booktitle = {In Seventh International Conference on Computational Fluid Dynamics},
address = {Hawaii},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Juli},
year = {2012},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-51&engl=0}
}
@inproceedings {INPROC-2012-50,
author = {Michael Lieb and Miriam Mehl and Tobias Neckel and Kristof Unterweger},
title = {{HPC Fluid Flow Simulations in Porous Media Geometries}},
booktitle = {Seventh International Conference on Computational Fluid Dynamics},
address = {NASA , Ames},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Juli},
year = {2012},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-50&engl=0}
}
@inproceedings {INPROC-2011-95,
author = {Benjamin Peherstorfer and Dirk Pfl{\"u}ger and Hans-Joachim Bungartz},
title = {{A Sparse-Grid-Based Out-of-Sample Extension for Dimensionality Reduction and Clustering with Laplacian Eigenmaps}},
booktitle = {AI 2011: Advances in Artificial Intelligence},
editor = {Dianhui Wang and Mark Reynolds},
address = {Berlin, Heidelberg},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computer Science},
volume = {7106},
pages = {112--121},
type = {Konferenz-Beitrag},
month = {Dezember},
year = {2011},
isbn = {9783642258312},
language = {Englisch},
cr-category = {I.2 Artificial Intelligence},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Spectral graph theoretic methods such as Laplacian Eigenmaps are among the most
popular algorithms for manifold learning and clustering. One drawback of these
methods is, however, that they do not provide a natural out-of-sample
extension. They only provide an embedding for the given training data. We
propose to use sparse grid functions to approximate the eigenfunctions of the
Laplace-Beltrami operator. We then have an explicit mapping between ambient and
latent space. Thus, out-of-sample points can be mapped as well. We present
results for synthetic and real-world examples to support the effectiveness of
the sparse-grid-based explicit mapping.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2011-95&engl=0}
}
@inproceedings {INPROC-2011-93,
author = {Murarasu Alin and Weidendorfer Josef and Buse Gerrit and Daniel Butnaru and Dirk Pfl{\"u}ger},
title = {{Compact Data Structure and Scalable Algorithms for the Sparse Grid Technique}},
booktitle = {Proceedings of the 16th ACM symposium on Principles and practice of parallel programming},
address = {New York, Usa},
publisher = {ACM},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {PPoPP '11},
pages = {25--34},
type = {Konferenz-Beitrag},
month = {Februar},
year = {2011},
isbn = {9781450301190},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2011-93&engl=0}
}
@inproceedings {INPROC-2011-92,
author = {Alexander Heinecke and Dirk Pfl{\"u}ger},
title = {{Multi- and Many-Core Data Mining with Adaptive Sparse Grids}},
booktitle = {Proceedings of the 8th ACM International Conference on Computing Frontiers},
address = {New York, Usa},
publisher = {ACM},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {29--29},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2011},
isbn = {9781450306980},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2011-92&engl=0}
}
@inproceedings {INPROC-2011-91,
author = {Daniel Butnaru and Dirk Pfl{\"u}ger and Hans-Joachim Bungartz},
title = {{Towards High-Dimensional Computational Steering of Precomputed Simulation Data using Sparse Grids}},
booktitle = {Proceedings of the International Conference on Computational Science (ICCS) 2011},
publisher = {Springer-Verlag},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Procedia CS},
volume = {4},
pages = {56--65},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2011},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2011-91&engl=0}
}
@inproceedings {INPROC-2011-89,
author = {Janos Benk and Miriam Mehl and Michael Ulbrich},
title = {{Sundance PDE Solvers on Cartesian Fixed Grids in Complex and Variable Geometries}},
booktitle = {Proceedinggs of the ECCOMAS Thematic Conference CFD \& Optimization, Antlya, Turkey, May 23-25, 2011},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2011},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2011-89&engl=0}
}
@inproceedings {INPROC-2011-88,
author = {Bernhard Gatzhammer and Miriam Mehl and Tobias Neckel},
title = {{Partitioned Fluid-Structure Interaction Coupling Methods for Black-Box Solvers}},
booktitle = {2nd International Conference on Computational Engineering (ICCE 2011)},
editor = {Marek Behr and Jens Lang and Ernst Rank and Michael Sch{\"a}fer},
address = {Darmstadt},
publisher = {typographics GmbH},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {76--77},
type = {Konferenz-Beitrag},
month = {Oktober},
year = {2011},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2011-88&engl=0}
}
@inproceedings {INPROC-2011-81,
author = {Martin Schreiber and Philipp Neumann and Stefan Zimmer and Hans-Joachim Bungartz},
title = {{Free-Surface Lattice-Boltzmann Simulation on Many-Core Architectures}},
booktitle = {Proceedings of the International Conference on Computational Science, ICCS 2011},
editor = {Mitsuhisa Sato and Satoshi Matsuoka and G. Dick van Albada and Jack Dongarra and Peter.M.A. Sloot},
publisher = {Elsevier},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Procedia Computer Science},
volume = {4},
pages = {984--993},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2011},
isbn = {doi:10.1016/j.procs.2011.04.001},
language = {Englisch},
cr-category = {J.2 Physical Sciences and Engineering},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Current advances in many-core technologies demand simulation algorithms suited
for the corresponding architectures while with regard to the respective
increase of computational power, real-time and interactive simulations become
possible and desirable. We present an OpenCL implementation of a
Lattice-Boltzmann-based free-surface solver for GPU architectures. The
massively parallel execution especially requires special techniques to keep the
interface region consistent, which is here addressed by a novel multipass
method. We further compare different memory layouts according to their
performance for both a basic driven cavity implementation and the free-surface
method, pointing out the capabilities of our implementation in real-time and
interactive scenarios, and shortly present visualizations of the flow, obtained
in real-time.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2011-81&engl=0}
}
@inproceedings {INPROC-2010-128,
author = {Hans-Joachim Bungartz and Alexander Heinecke and Dirk Pfl{\"u}ger and Stefanie Schraufstetter},
title = {{Parallelizing a Black-Scholes Solver based on Finite Elements and Sparse Grids}},
booktitle = {IEEE International Parallel \& Distributed Processing Symposium},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2010},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2010-128&engl=0}
}
@inproceedings {INPROC-2010-126,
author = {Miriam Mehl and Bernhard Gatzhammer and Tobias Neckel},
title = {{Partitioned Fluid-Structure Interaction Simulations Using a Hierarchical Cartesian Flow Solver}},
booktitle = {Prooceddings of the Fifth European Conference on Computational Fluid Dynamics, ECCOMAS CFD 2010, 14th-17th June 2010, Lissabon},
address = {Lissabon},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2010},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2010-126&engl=0}
}
@inproceedings {INPROC-2010-125,
author = {Tobias Neckel and Miriam Mehl and Christoph Zenger},
title = {{Enhanced Divergence-Free Elements for Efficient Incompressible Flow Simulations in the PDE Framework Peano}},
booktitle = {Prooceedings of the Fifth European Conference on Computational Fluid Dynamics, ECCOMAS CFD 2010, 14th-17th June 2010, Lissabon},
address = {Lissabon},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2010},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2010-125&engl=0}
}
@inproceedings {INPROC-2009-143,
author = {Hans-Joachim Bungartz and Miriam Mehl and Tobias Neckel},
title = {{Steady-state Flow Simulations using Exact Jacobians on Cartesian Grids}},
booktitle = {Proceedings of the 1st African Conference on Computational Mechanics (Africomp)},
editor = {A. G. Malan and P. Nithiarasu and O. Oxtoby},
address = {Sun City, South Africa},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2009},
language = {Englisch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2009-143&engl=0}
}
@inproceedings {INPROC-2009-142,
author = {Bernhard Gatzhammer and Miriam Mehl and Tobias Weinzierl},
title = {{A Coupling Tool for the Partitioned Simulation of Fluid-Structure Interactions}},
booktitle = {Computational Methods in Marine Engineering},
editor = {T. Kvamsdal and B. Pettersen and P. Bergan and E. Onate and J. Garcia},
address = {Trondheim},
publisher = {CIMNE},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {147--150},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2009},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2009-142&engl=0}
}
@inproceedings {INPROC-2008-153,
author = {Christoph Zenger and Michael Bader and Miriam Mehl},
title = {{Cache oblivious Memory Management for PDE-solvers}},
booktitle = {Schnelle L{\"o}ser f{\"u}r partielle Differentialgleichungen},
editor = {Randolph E. Banks},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Oberwolfach Reports},
volume = {23},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2008},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2008-153&engl=0}
}
@inproceedings {INPROC-2008-152,
author = {Miriam Mehl and Markus Brenk and Ioan Lucian Muntean and Tobias Neckel and Tobias Weinzierl},
title = {{A Modular and Efficient Simulation Environment for Fluid-Structure Interactions with Large Domain Deformation}},
booktitle = {Proceedings of the Sixth International Conference on Engineering Computational Technology, Athens, September 2008},
editor = {M. Papadrakakis and B. H. V. Topping},
address = {Kippen, Strirlingshire, United Kingdom},
publisher = {Civil-Comp Press},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {September},
year = {2008},
isbn = {9781905088263},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2008-152&engl=0}
}
@inproceedings {INPROC-2008-151,
author = {Tobias Neckel and Miriam Mehl and Hans-Joachim Bungartz and Takayuki Aoki},
title = {{CFD simulations using an AMR-like approach in the PDE framework Peano}},
booktitle = {CFD2008},
address = {Tokyo},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Dezember},
year = {2008},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2008-151&engl=0}
}
@inproceedings {INPROC-2008-148,
author = {Hans-Joachim Bungartz and Dirk Pfl{\"u}ger and Stefan Zimmer},
title = {{Adaptive Sparse Grid Techniques for Data Mining}},
booktitle = {Modelling, Simulation and Optimization of Complex Processes 2006},
editor = {H.G. Bock and E. Kostina and X.P. Hoang and R. Rannacher},
address = {Berlin, Heidelberg},
publisher = {Springer-Verlag},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {121--130},
type = {Konferenz-Beitrag},
month = {Juli},
year = {2008},
isbn = {978-3540794080},
language = {Englisch},
cr-category = {G.1.2 Numerical Analysis Approximation,
H.2.8 Database Applications},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {It was shown in [GaGT01] that the task of classification in data mining can be
tackled by employing ansatz functions associated to grid points in the (often
high dimensional) feature-space rather than using data-centered ansatz
functions. To cope with the curse of dimensionality, sparse grids have been
used. Based on this approach we propose an efficient finite-element-like
discretization technique for classification instead of the combination
technique used in [GaGT01]. The main goal of our method is to make use of
adaptivity to further reduce the number of grid points needed. Employing
adaptivity in classification is reasonable as the target function contains
smooth regions as well as rough ones. Regarding implementational issues we
present an algorithm for the fast multiplication of the vector of unknowns with
the coefficient matrix. We give an example for the adaptive selection of grid
points and show that special care has to be taken regarding the boundary
values, as adaptive techniques commonly used for solving PDEs are not optimal
here. Results for some typical classification tasks, including a problem from
the UCI repository, are presented.
[GaGT01] J. Garcke, M. Griebel and M. Thess. Data Mining with Sparse Grids.
Computing 67(3), 2001, p. 225 - 253.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2008-148&engl=0}
}
@inproceedings {INPROC-2007-147,
author = {Dirk Pfl{\"u}ger and Ioan Lucian Muntean and Hans-Joachim Bungartz},
title = {{Adaptive Sparse Grid Classification Using Grid Environments}},
booktitle = {ICCS 2007},
editor = {Yong Shi and Dick van Albada and Jack Dongarra and Peter Sloot},
address = {Berlin, Heidelberg,},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {LNCS},
volume = {4487},
pages = {708--715},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2007},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2007-147&engl=0}
}
@inproceedings {INPROC-2007-145,
author = {Markus Brenk and Hans-Joachim Bungartz and Miriam Mehl and Ioan Lucian Muntean and Tobias Neckel and Tobias Weinzierl},
title = {{A coupling environment for fluid-structure interactions on Cartesian grids}},
booktitle = {International Conference on Computational Methods in Marine Engineering},
editor = {P. Bergan and J. Garcia and E. Onate and T. Kvamsdal},
address = {Barcelona},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2007},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2007-145&engl=0}
}
@inproceedings {INPROC-2007-144,
author = {Miriam Mehl and Markus Brenk and Ioan Lucian Muntean and Tobias Neckel and Tobias Weinzierl},
title = {{Benefits of Structured Cartesian Gris for the Simulation of Fluid-Structure Interactions}},
booktitle = {Proceedings of the Third Asian-Pacific Congress on Computational Mechanics, APCOM 07},
editor = {G. Yagawa and V.P. Iu and K. Kashiyama and N. Miyazaki and E. Arantes e Oliveira and S. Valliappan and T. Yabe and M.W. Yuan and S. Yoshimura},
address = {Kyoto, Japan},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Dezember},
year = {2007},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2007-144&engl=0}
}
@inproceedings {INPROC-2006-63,
author = {Srihari Narasimhan and Hans-Joachim Bungartz},
title = {{Methods for Optimal Pedestrian Task Scheduling and Routing}},
booktitle = {Proceedings of the 25th workshop of the UK Planning and Scheduling Special Interest Group (PlanSIG'06)},
editor = {Rong Qu},
address = {Nottingham, UK},
publisher = {The University of Nottingham},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {97--104},
type = {Konferenz-Beitrag},
month = {Dezember},
year = {2006},
language = {Englisch},
cr-category = {F.2.2 Nonnumerical Algorithms and Problems,
G.2.1 Discrete Mathematics Combinatorics,
G.3 Probability and Statistics,
I.6 Simulation and Modeling},
contact = {narasisi@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Today, sensors and cameras are often used to monitor the movement and behavior
of pedestrians, especially where there are a huge number of visitors. The
classical usage of such devices, for example in a theme park, is to identify
the queue size in front of each attraction and thereby to predict the time it
takes until the visit can be completed. Work has been done in the past to use
statistical data that resembles the data collected by such devices to simulate
the pedestrian behavior. As a result, the congestions as well as the queue
sizes at different times can be predicted. This work aims in using the data
obtained from the simulation to optimally schedule a list of tasks to be
executed as well as to find an optimal path between each destination. As an
example, one might think of a scenario where a customer enters a theme park
would wish to visit as many attractions as possible in the alloted time or a
large clinic where a patient has to be routed through various departments such
as registration, OP, X-Ray, ward, etc. The problem involves finding the optimal
sequence of the tasks and determining the fastest path between the
destinations, both combined. Since the data varies over time, the problem is
time dependent or dynamic. In the past, several methods have been proposed to
solve dynamic shortest path algorithms and scheduling problems. However, due to
the stochastic nature of the available data, it is not necessary to find the
best schedule and route that takes the minimum amount of time but, it is rather
important to find an optimal solution in a short time. In this paper, we study
and compare different combinatorial optimization methods and heuristics that
can used to determine an optimal schedule.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2006-63&engl=0}
}
@inproceedings {INPROC-2006-45,
author = {Srihari Narasimhan and Ralf-Peter Mundani and Hans-Joachim Bungartz},
title = {{An Octree- and A Graph-Based Approach to Support Location Aware Navigation Services}},
booktitle = {Proceedings of the 2006 International Conference on Pervasive Systems and Computing (PSC'06)},
editor = {Hamid R. Arabnia},
address = {Las Vegas, USA},
publisher = {CSREA Press},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {24--30},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2006},
keywords = {octree; location awareness; graph algorithms; navigation and routing services},
language = {Englisch},
cr-category = {E.1 Data Structures,
G.2.2 Discrete Mathematics Graph Theory},
contact = {Srihari Narasimhan narasisi@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Over the last decade, there is an increasing trend in the use of more and more
mobile navigation devices. In order to make mobile navigation more intelligent,
issues such as location and context awareness need to be addressed to offer
location-based navigation services. For example, one might think of a scenario
of a large commercial center where a customer with some mobile device in hand
wishes to go to a drugstore. The system should efficiently identify the current
location of the customer, a list of drugstores located nearby, the easiest path
to the next drugstore and provide routing and destination suggestions to the
customer. In this paper, assuming that the mobile device gives us the
co-ordinates of the current location of the customer, we present a graph and an
octree-based approach to identify the location of the customer, identify a list
of destinations located in the neighborhood and determine the best possible
destination and the respective path to the destination.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2006-45&engl=0}
}
@inproceedings {INPROC-2006-44,
author = {Srihari Narasimhan and Hans-Joachim Bungartz},
title = {{A Framework for A Graph- and Queuing System-Based Pedestrian Simulation}},
booktitle = {Proceedings of the 2006 International Conference on Modeling, Simulation and Visualization Methods (MSV'06)},
editor = {Hamid R. Arabnia},
address = {Las Vegas, USA},
publisher = {CSREA Press},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {87--93},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2006},
keywords = {discrete-event simulation; queuing systems; pedestrian simulation; graph algorithms},
language = {Englisch},
cr-category = {G.3 Probability and Statistics,
I.6.8 Types of Simulation},
contact = {Srihari Narasimhan narasisi@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {With a growing trend in usage of mobile navigation devices, there is also a
need for an intelligent pedestrian navigation system. As an example, one might
think of a visit to a large commercial center or a theme park, where the
visitor must be efficiently guided to accomplish his tasks. In order to
efficiently schedule a visit in such a scenario, the system not only needs to
simulate and determine the waiting times across each destination, but also to
integrate the entire system into the geometry of the scenario, to provide
spatial context to non-spatial data. In this paper, we present a framework for
a pedestrian simulation that models the movement of pedestrians by embedding
the simulation into a geometric context. The resulting model considers the
dimensions and architectural constraints of the scenario, simulates the
pedestrian movement over a 3D graph network and gives an overall view of the
congestions along the paths, waiting times at the destinations, etc.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2006-44&engl=0}
}
@inproceedings {INPROC-2006-28,
author = {Martin Bernreuther and Hans-Joachim Bungartz},
title = {{Learning by Doing: Software Projects in CSE Education}},
booktitle = {Computational Science – ICCS 2006: 6th International Conference, Reading, UK, May 28-31, 2006. Proceedings, Part II},
editor = {Vassil N. Alexandrov and Geert Dick van Albada and Peter M.A. Sloot and Jack Dongarra},
address = {Berlin, Heidelberg},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computer Science},
volume = {3992},
pages = {161--168},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2006},
isbn = {3-540-34381-4},
keywords = {CSE-related student group project; team-based learning; computational science and engineering; software engineering; education; molecular dynamics},
language = {Englisch},
cr-category = {K.3 Computers and Education,
I.6 Simulation and Modeling,
D.2 Software Engineering,
J.2 Physical Sciences and Engineering},
ee = {http://www.springeronline.com/3-540-34381-4,
http://dx.doi.org/10.1007/11758525_22},
contact = {Martin.Bernreuther@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Software development is one of the main routine activities in Computational
Science and Engineering (CSE). Nevertheless, there is a huge gap between
software engineering techniques available and established today in most fields
where mainstream software is developed on the one hand and the typical extent
of their application in a CSE context on the other hand. CSE curricula often
reflect this tendency by not including software engineering topics adequately.
This contribution reports experiences with a new course format called ``student
project'' in the CSE master's program at TU M{\"u}nchen. There, for about half a
year, a group of 4-8 students cooperate on a software development project -
this time dealing with molecular dynamics. Although it is one objective to get
a well performing code, the project's focus is on the consequent application of
software engineering and project management practices.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2006-28&engl=0}
}
@inproceedings {INPROC-2006-112,
author = {Hans-Joachim Bungartz and Miriam Mehl},
title = {{CARTESIAN DISCRETISATIONS FOR FLUID-STRUCTURE INTERACTION - EFFICIENT FLOW SOLVER}},
booktitle = {Proceedings ECCOMAS CFD 2006, European Conference on Computational Fluid Dynamics, Egmond an Zee, September 5th-8th 2006},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2006},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2006-112&engl=0}
}
@inproceedings {INPROC-2005-82,
author = {Srihari Narasimhan and Hans-Joachim Bungartz},
title = {{Congestion-Aware Optimization of Pedestrian Paths}},
booktitle = {Proceedings of the 18th Symposium Simulationstechnique ASIM 2005},
editor = {Frank H{\"u}lsemann and Markus Kowarschik and Ulrich R{\"u}de},
address = {Erlangen},
publisher = {SCS Publishing House},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Frontiers in Simulation},
volume = {15},
pages = {242--247},
type = {Konferenz-Beitrag},
month = {September},
year = {2005},
isbn = {3-936150-41-9},
language = {Englisch},
cr-category = {G.1.6 Numerical Analysis Optimization,
G.2.2 Discrete Mathematics Graph Theory,
I.6 Simulation and Modeling,
I.3.5 Computational Geometry and Object Modeling},
ee = {http://www10.informatik.uni-erlangen.de/asim2005/},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Today, more and more simulation tasks with a traditionally non-geometric
background need to be embedded into some geometric context in order to provide
spatial context to non-spatial data. This holds especially for graph-based
applications in some location-aware context. As an example, one might think of
a large theme park or a large commercial centre where the customers shall be
provided with some navigation and scheduling information such as where to go
when -- either a priori or even in real time via some mobile device. In this
paper, we present an approach to embed an event-driven simulation tool for
pedestrian traffic into a 3D geometric environment in order find an optimal
path through the graph-based model by considering the congestions caused due to
the pedestrian movements.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2005-82&engl=0}
}
@inproceedings {INPROC-2005-42,
author = {Martin Bernreuther and Hans-Joachim Bungartz},
title = {{Molecular Simulation of Fluid Flow on a Cluster of Workstations}},
booktitle = {18th Symposium Simulationstechnique ASIM 2005 Proceedings},
editor = {Frank H{\"u}lsemann and Markus Kowarschik and Ulrich R{\"u}de},
address = {Erlangen},
publisher = {SCS Publishing House},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Frontiers in Simulation},
volume = {15},
pages = {117--123},
type = {Konferenz-Beitrag},
month = {September},
year = {2005},
isbn = {ISBN 3-936150-41-9},
language = {Englisch},
cr-category = {D.1.3 Concurrent Programming,
G.1.0 Numerical Analysis General,
G.4 Mathematical Software,
I.6.8 Types of Simulation,
J.2 Physical Sciences and Engineering},
ee = {http://www10.informatik.uni-erlangen.de/asim2005/},
contact = {Martin Bernreuther Martin.Bernreuther@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Simulation of fluid properties and flow below a certain length scale, where the
continuum assumption does not hold any more, has to be done on a molecular
level. Molecular Dynamics (MD) is a proper tool for nanofluidics. The limits of
the system sizes manageable today are pushed not only by advances and
availability of new hardware. It's even more important to achieve enhancements
in the development of fast efficient algorithms and hardware optimized
implementations. High Performance Computing systems and especially Clusters of
Workstations, which turn out to be very well suited for this task, are the
primary target platform for the majority of MD codes today. After a
classification of the flow type addressed here, implementation details and
parallelization strategies will be discussed for MD simulations based on
short-range potentials, suitable for a rich variety of components.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2005-42&engl=0}
}
@inproceedings {INPROC-2005-41,
author = {Martin Bernreuther and Hans-Joachim Bungartz},
title = {{Wissenschaftliches Rechnen in der Lehre am Beispiel des Studienprojekts ``Computational Steering - der virtuelle Windkanal''}},
booktitle = {18th Symposium Simulationstechnique ASIM 2005 Proceedings},
editor = {Frank H{\"u}lsemann and Markus Kowarschik and Ulrich R{\"u}de},
address = {Erlangen},
publisher = {SCS Publishing House},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Frontiers in Simulation},
volume = {15},
pages = {702--707},
type = {Konferenz-Beitrag},
month = {September},
year = {2005},
isbn = {ISBN 3-936150-41-9},
language = {Deutsch},
cr-category = {D.1.3 Concurrent Programming,
F.1.2 Modes of Computation,
G.1.0 Numerical Analysis General,
G.4 Mathematical Software,
I.6.8 Types of Simulation,
J.2 Physical Sciences and Engineering,
J.6 Computer-Aided Engineering},
ee = {http://www10.informatik.uni-erlangen.de/asim2005/},
contact = {Martin Bernreuther Martin.Bernreuther@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {The recently finished project ``Computational Steering - the virtual wind
tunnel'' is a team work of nine software engineering students, who worked one
year to develop a software system for the simulation of wind tunnel tests in a
virtual environment. A special feature of the package is the simulation
steering capability, where not only an online visualization of the CFD
simulation results is provided, but also the possiblity to interact with the
simulation during a run in a Virtual Reality environment. To achieve this goal
an intense use of special HPC and VR hardware is indispensable. The software
runs on a distributed system of parallel architectures and was realized on the
department's Linux CoW ``Mozart'', an SGI Onyx multiprocessor visualization
system driving a Powerwall, and a tracking system for user input. The
development process itself is based on software engineering methods while the
student project imitates all phases of a commercial software production
process.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2005-41&engl=0}
}
@inproceedings {INPROC-2005-40,
author = {Martin Bernreuther and Markus Brenk and Hans-Joachim Bungartz and Ralf-Peter Mundani and Ioan Lucian Muntean},
title = {{Teaching High-Performance Computing on a High-Performance Cluster}},
booktitle = {Proceedings of the 5th International Conference on Compuatational Science : ICCS 2005; Emory University, Atlanta, USA, May 22-25, 2005},
address = {Atlanta},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computer Science},
pages = {1--9},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2005},
language = {Englisch},
cr-category = {D.1.3 Concurrent Programming,
F.1.2 Modes of Computation,
G.1.0 Numerical Analysis General,
G.4 Mathematical Software,
I.6.8 Types of Simulation,
J.2 Physical Sciences and Engineering},
ee = {http://www.iccs-meeting.org/iccs2005/schedule/program.php?show=W01a&showAbstracts=true},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {The university education in parallel and high-performance computing often
suffers from a significant gap between the effects and potential performance
taught in the lectures on the one hand and those practically experienced in
exercises or lab courses on the other hand. With a small number of processors,
the results obtained are often hardly convincing; however, machines crunching
numbers at least a bit are rarely accessible to students doing their first
steps in parallel programming. In this contribution, we present our experiences
of how a state-of-the- art mid-size Linux cluster (64 dual-board P4 nodes with
InfiniBand 4x networking, providing an HPL benchmark performance of almost 0.6
TFlops), bought and operated on a department level primarily for edu- cation
and algorithm development purposes, can be used for teaching a large variety of
HPC aspects such as basics of parallel algorithms, classi- cal tuning, or
hardware-aware programming. Special focus is put on the effects of such an
approach on the intensity and sustainability of learning.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2005-40&engl=0}
}
@inproceedings {INPROC-2005-131,
author = {Markus Brenk and Hans-Joachim Bungartz and Miriam Mehl and Ralf-Peter Mundani and Alexander D{\"u}ster and Dominik Scholz},
title = {{Efficient Interface Treatment for Fluid-Structure Interaction on Cartesian Grids}},
booktitle = {Proc. of the ECCOMAS Thematic Conf. on Comp. Methods for Coupled Problems in Science and Engineering},
publisher = {Sonstige},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Januar},
year = {2005},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2005-131&engl=0}
}
@inproceedings {INPROC-2005-130,
author = {Miriam Mehl and Christoph Zenger},
title = {{Cache-oblivious parallel multigrid solvers on adaptively refined grids}},
booktitle = {Proceedings of the 18th Symposium Simulationstechnique (ASIM 2005)},
editor = {Frank H{\"u}lsemann and Markus Kowarschik and Ulrich R{\"u}de},
address = {Erlangen},
publisher = {SCS European Publishing House},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Fortschritte in der Simulationstechnik - Frontiers in Simulation},
volume = {15},
pages = {173--179},
type = {Konferenz-Beitrag},
month = {September},
year = {2005},
isbn = {3-936150-41-9},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2005-130&engl=0}
}
@inproceedings {INPROC-2005-108,
author = {Martin Bernreuther and Jadran Vrabec},
title = {{Molecular simulation of fluids with short range potentials}},
booktitle = {High Performance Computing on Vector Systems: Proceedings of the Second Teraflop Workshop; Stuttgart, March 17-18, 2005},
editor = {Michael Resch and Thomas B{\"o}nisch and Katharina Benkert and Toshiyuki Furui and Yoshiki Seo and Wolfgang Bez},
address = {Stuttgart},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {187--195},
type = {Konferenz-Beitrag},
month = {Dezember},
year = {2005},
isbn = {3-540-29124-5},
keywords = {Molecular Dynamics; parallel algorithms; nanofluids; nucleation},
language = {Englisch},
cr-category = {J.2 Physical Sciences and Engineering,
I.6.8 Types of Simulation,
G.4 Mathematical Software,
G.1.0 Numerical Analysis General,
D.1.3 Concurrent Programming},
ee = {http://www.teraflop-workbench.org/htm/events/March_05_Workshop.htm,
http://www.springer.de/3-540-29124-5},
contact = {Martin.Bernreuther Martin.Bernreuther@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Molecular modeling and simulation of thermophysical properties using
short-range potentials covers a large variety of real simple fluids and
mixtures. To study nucleation phenomena within a research project, a molecular
dynamics simulation package is developed. The target platform for this software
are Clusters of Workstations (CoW), like the Linux cluster ``Mozart'' with 64
dual nodes, which is available at the Institute of Parallel and Distributed
Systems, or the HLRS cluster ``cacau'', which is part of the Teraflop Workbench.
The used algorithms and data structures are discussed as well as first
simulation results.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2005-108&engl=0}
}
@inproceedings {INPROC-2004-93,
author = {Martin Buchholz and Dirk Pfl{\"u}ger and Josiah Poon},
title = {{Application of Machine Learning Techniques to the Re-ranking of Search Results}},
booktitle = {KI 2004: Advances in Artificial Intelligence},
editor = {Susanne Biundo and Thom Fr{\"u}hwirth and G{\"u}nther Palm},
publisher = {Springer-Verlag},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computer Science},
volume = {3238},
pages = {67--81},
type = {Konferenz-Beitrag},
month = {September},
year = {2004},
isbn = {3-540-23166-8},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-93&engl=0}
}
@inproceedings {INPROC-2004-39,
author = {Hans-Joachim Bungartz},
title = {{Some remarks on CSE education in Germany}},
booktitle = {Proceedings of the 2004 International Conference on Computational Science: ICCS 2004},
editor = {Marian Bubak and Geert D. van Albada and Peter M.A. Sloot and Jack J. Dongarra},
address = {Heidelberg},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computer Science},
volume = {3039},
pages = {1180--1187},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2004},
isbn = {354022114X},
language = {Englisch},
cr-category = {K.3 Computers and Education},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-39&engl=0}
}
@inproceedings {INPROC-2004-37,
author = {Hans-Joachim Bungartz and Stefan Dirnstorfer},
title = {{Higher order quadrature on sparse grids}},
booktitle = {Proceedings of the 2004 International Conference on Computational Science: ICCS 2004},
editor = {Marian Bubak and Geert D. van Albada and Peter M.A. Sloot and Jack J. Dongarra},
address = {Heidelberg},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computer Science},
volume = {3039},
pages = {394--401},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2004},
isbn = {354022114X},
language = {Englisch},
cr-category = {G.1 Numerical Analysis},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-37&engl=0}
}
@inproceedings {INPROC-2004-36,
author = {Andreas Niggl and Richard Romberg and Ernst Rank and Ralf-Peter Mundani and Hans-Joachim Bungartz},
title = {{A Framework for Concurrent Structure Analysis in Building Industry}},
booktitle = {Proceedings of the 5th European Conference on Product and Process Modelling in the Building and Construction Industry: ECPPM '04; Istanbul, Turkey, September 8-10, 2004},
editor = {A. Dikbas and R. Scherer},
publisher = {A.A. Balkema Publishers},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {September},
year = {2004},
isbn = {04-1535-938-4},
keywords = {octrees; volume-oriented geometric modelling; finite elements; RDBMS; network-based cooperative work},
language = {Englisch},
cr-category = {E.1 Data Structures,
E.4 Data Coding and Information Theory,
G.1.8 Partial Differential Equations,
H.2.4 Database Management Systems,
J.2 Physical Sciences and Engineering,
J.6 Computer-Aided Engineering},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {In this paper, a software-framework, which helps to support the concurrent work
of multiple planners in the construction industry, will be presented. Basis of
this work is a strictly three dimensional building model. This model is stored
in a central database, which supports the cooperative work of multiple planners
by using an object based 'check in', 'checkout' and 'locking' mechanism.
Furthermore a decomposition algorithm will be shown, which automatically
derives a hexahedral mesh for a finite element computation from this central
building model.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-36&engl=0}
}
@inproceedings {INPROC-2004-35,
author = {Ralf-Peter Mundani and Hans-Joachim Bungartz},
title = {{Octrees for Cooperative Work in a Network-Based Environment}},
booktitle = {Proceedings of the 10th International Conference on Computing in Civil and Building Engineering: ICCCBE '04; Weimar, Germany, June 2-4, 2004},
editor = {K. Beucke and Firmenich B. and D. Donath and R. Fruchter and K. Roddis},
publisher = {VDG Weimar},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2004},
keywords = {octrees; volume-oriented geometric modelling; convex hull decomposition; RDBMS; network-based cooperative work},
language = {Englisch},
cr-category = {E.1 Data Structures,
E.4 Data Coding and Information Theory,
H.2.4 Database Management Systems,
I.3.5 Computational Geometry and Object Modeling,
J.2 Physical Sciences and Engineering,
J.6 Computer-Aided Engineering},
contact = {Ralf-Peter Mundani Ralf.Mundani@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {While surface-oriented models became more and more popular because of their
flexibility concerning manipulation, especially within CAD applications, they
are only conditionally suited for simulation or controlling tasks, a field
still dominated by volume-oriented models. Due to their spatial decomposition
of the underlying geometry, volume-oriented models provide an easy access to
simulation tasks relevant in civil engineering like air conditioning of rooms,
statics analysis of buildings, or managing and controlling design processes.
Here, hierarchical recursive data structures like octrees seem to be perfectly
suited to efficiently bridge the gap between classical CAD applications on the
one side and volume-oriented tasks as mentioned above on the other side. Within
our research, a global geometric model represented by an octree is the starting
point of a network-based cooperative working environment, allowing us a fast
and efficient control of collision detection and model revision as well as the
integration of different simulation tasks or disciplines like architecture and
civil engineering, for instance.
For a fast derivation - even on-the-fly - of a volume-oriented model from a
surface-oriented one, the octrees are generated by intersecting half-spaces
that come from single flat surface patches of the original CAD model, provided
in the (Eurostep) IFC format. As only convex objects can obviously be processed
by this method, non-convex objects have to be decomposed into convex parts in
advance. For a convex decomposition, such an object's convex hull is
recursively calculated, marking all faces lying on the convex hull and
processing the rest in the same way until all faces are labelled. With respect
to these labels, an expression consisting of the three Boolean operators union,
difference, and intersection is formed, describing a unique order to process
the corresponding half-spaces. Hence, the result is an (volume-oriented) octree
representation of the original surface-oriented geometry.
A linearisation and binary encoding of these octrees result in bit streams to
which different operators like collision detection, for instance, can be
applied. Any inconsistencies can be easily detected to be removed by the
respective expert. Thus, the consistency of the global geometric model is
ensured. For a cooperative work, the global geometric model is stored in a
Relational Database Management System (RDBMS), accessed by a second control
octree storing the primary keys to the RDBMS's tables, such that neighbouring
elements or collisions between revised elements can be detected in a fast and
efficient way. The cooperative work is further supported by several
check-in/check-out methods, providing different levels of granularity
concerning notifications being sent to all participating experts based on their
actual processed elements as well as typical read-only, read-write, and
exclusive-write permissions for each element.
The usage of octrees as integral element in a network-based cooperative working
environment not only simplifies the control and combination of different tasks,
it can also work as common interface between several disciplines - e.g.
architecture and civil engineering - to bring us one step closer to the
long-term objective of completely embedded simulation processes.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-35&engl=0}
}
@inproceedings {INPROC-2004-34,
author = {Ralf-Peter Mundani and Hans-Joachim Bungartz},
title = {{An Octree-Based Framework for Process Integration in Structural Engineering}},
booktitle = {Proceedings of the 8th World Multi-Conference on Systemics, Cybernetics and Informatics - Volume II: SCI '04; Orlando, Florida, USA, July 18-21, 2004},
editor = {N. Callaos and W. Lesso and B. Sanchez},
publisher = {International Institute of Informatics and Systemics},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {197--202},
type = {Konferenz-Beitrag},
month = {Juli},
year = {2004},
isbn = {980-6560-13-2},
keywords = {octrees; hierarchical data structures; octree-based framework; process integration; cooperative work; collision detection},
language = {Englisch},
cr-category = {E.1 Data Structures,
E.4 Data Coding and Information Theory,
I.3.5 Computational Geometry and Object Modeling,
I.3.7 Three-Dimensional Graphics and Realism,
J.2 Physical Sciences and Engineering,
J.6 Computer-Aided Engineering},
contact = {Ralf-Peter Mundani Ralf.Mundani@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Octrees - hierarchical data structures based on recursive substructuring - have
turned out to be a powerful representative of the hierarchical paradigm,
advantageous in a large variety of applications such as visualisation, computer
graphics, databases resp. data mining, mesh generation, numerical simulation,
or Geographic Information Systems (GIS). In this paper, octrees are used to
build up a framework for the integration of CAD, simulation, and visualisation
tasks from the field of structural engineering in a network-based cooperative
working environment. It will be shown that, by providing octree-based tools,
the coupling of these tasks and the control of the entire design process can be
improved and simplified.
Starting from a CAD model, due to a new method based on the intersection of
half-spaces, an octree representation can be efficiently derived, if necessary
also in real time more details). A linearisation followed by a binary encoding
of such trees results in streams that can be assigned to Boolean operators or
more sophisticated tools for further processing - even on-the-fly. As such
streams can be described by a Chomsky-II-grammar, their integrity - e.g. after
transmission over a network - can easily be checked by a corresponding finite
state automaton. Based on octree encoded streams, tools for various purposes
like providing interfaces between different applications (e.g. CAD and
numerical simulation tasks such as computational fluid dynamics) or collision
detection between single parts of a geometric model, for instance, are
possible.
Furthermore, to ensure global consistency of shared data processed by several
experts in a network-based cooperative working environment, for instance, a
geometric model is stored in a Relational Database Managment System (RDBMS)
which can only be accessed by an octree and corresponding check-in/check-out
functions. Thus, any modified parts intended to be written to the RDBMS and
conflicting with the rest of the data can easily be detected. As octrees -
because of their inherent hierarchy - also allow access to the data on
different resolutions levels (e.g. walls, rooms, or floors), even conflicts
among various processes can be detected and, hence, entire design processes can
be coordinated and improved.
Another application scenario - visualisation and virtual reality - is also
covered by this framework. Here, the former discussed model can be augmented by
any arbitrary data (e.g. room informations), and a graph for shortest-path
algorithms can automatically be derived and manipulated, meant for viewing both
as VRML application within a web browser and as immersive stereo projection on
more sophisticated devices like a power wall or a CAVE.
Summarising, the usage of an octree-based framework for the integration of
processes from the field of structural engineering not only bridges the gap
between the different applications like CAD, simulation, and visualisation, it
also simplifies and improves the control abilities of these processes as a
fundamental in a network-based cooperative working environment.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-34&engl=0}
}
@inproceedings {INPROC-2003-41,
author = {Ralf-Peter Mundani and Hans-Joachim Bungartz and Ernst Rank and Richard Romberg and Andreas Niggl},
title = {{Efficient Algorithms for Octree-Based Geometric Modelling}},
booktitle = {Proceedings of the Ninth International Conference on Civil and Structural Engineering Computing: CC '03; Egmond aan Zee, The Netherlands, September 2-4, 2003},
editor = {B.H.V. Topping},
publisher = {Civil-Comp Press},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {September},
year = {2003},
keywords = {octrees; volume-oriented geometric modelling; consistency checks; hierarchical data structures; on-the-fly generation; embedded simulation},
language = {Englisch},
cr-category = {I.3.5 Computational Geometry and Object Modeling,
I.6.0 Simulation and Modeling General,
I.6.3 Simulation and Modeling Applications,
J.2 Physical Sciences and Engineering,
J.6 Computer-Aided Engineering},
contact = {Ralf-Peter Mundani Ralf.Mundani@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Dealing with surface-oriented models - e.g. B-Rep models - is very popular and
appropriate for many applications. They can be read by most CAD programs and
they provide all freedom of modelling. Concerning a lot of other tasks -
consistency checks, collision detection, structural analysis, flow simulation,
e.g. - these models become difficult to handle, and a volume-oriented model has
to be derived from the existing surface-oriented one. Hierarchical
volume-oriented models, represented by octrees for example, provide an easy
access to solve the latter tasks with respect to their spatial decomposition of
the underlying geometry. This paper deals with fast and efficient algorithms to
generate and process octrees - even on-the-fly - from surface-oriented models
for applications in civil engineering. Encoding these octrees as binary streams
makes them suitable to get multiplexed with other octree-coded objects or for
the usage in pipe-like constructs.
Conventional algorithms for octree generation or processing don't exploit the
full potential of these structures. In spite of the principal advantages of
octrees concerning complexity, objects of a higher resolution typically still
entail too high run-time and memory requirements. Usually, an expensive
floating-point-based decision whether or not to refine the structure has to be
taken in each voxel (cell) successively. In our approach, instead, the
refinement decision is done by a simple parameter comparison of plane
equations, avoiding all these costs.
By treating each face of the surface-oriented model as a plane that divides the
whole space into two half spaces - inside and outside -, the volume-oriented
model can be built from intersecting all inside-attributed half spaces. The
steps for generating an octree presentation for each corresponding plane,
intersecting these octrees, and encoding the result as a binary stream can be
done at once - thus, the octree generation is free of any redundant
calculations, and the overall memory requirements are reduced to a minimum due
to the usage of stacks. The highest gain can be achieved in run-time, e.g. an
octree generation for an average geometry with more than 1.5 billion voxels can
be done in best time on a standard PC. Several of these binary streams can be
multiplexed to perform further Boolean or more sophisticated operations (e.g.
collision detection), while one always has the choice to perform this
operations on-the-fly or to perform consecutive operations - like with Unix
pipes - on binary streams written to the hard disk.
One target application of this method deals with consistency checks for CAD
models in the scope of simplifying and unifying planning processes in civil
engineering. Before a connection model for structural analysis is created out
of an (Eurostep) IFC model, any modelling errors (geometric inconsistencies) -
wrong intersections or gaps between parts of the model - can be detected fast
and easily. Hence, this proceeding enables us to obtain a reliable
volume-oriented attributed model that can serve for numerical simulations as
well as to determine relations between parts of the model to ensure global
consistency, which brings us one step closer to the long-term objective of
completely embedded simulation processes.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-41&engl=0}
}
@inproceedings {INPROC-2002-32,
author = {Michael Bader and Hans-Joachim Bungartz and Anton Frank and Ralf-Peter Mundani},
title = {{Space Tree Structures for PDE Software}},
booktitle = {Proceedings of the 2002 International Conference on Computational Science: ICCS 2002; Amsterdam, The Netherlands, April 21-24, 2002},
editor = {P.M.A. Sloot and C.J. Kenneth Tan and J.J. Dongarra and A.G. Hoekstra},
publisher = {Springer-Verlag},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computer Science},
volume = {2331},
pages = {662--671},
type = {Konferenz-Beitrag},
month = {April},
year = {2002},
isbn = {3-540-43594-8},
keywords = {octrees; hierarchical data structures; partial differential equations; multigrid},
language = {Englisch},
cr-category = {E.1 Data Structures,
E.4 Data Coding and Information Theory,
G.1.8 Partial Differential Equations,
I.3.5 Computational Geometry and Object Modeling},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {In this paper, we study the potential of space trees (boundary extended octrees
for an arbitrary number of dimensions) in the context of software for the
numerical solution of PDEs. The main advantage of the approach presented is the
fact that the underlying geometry's resolution can be decoupled from the
computational grid's resolution, although both are organized within the same
data structure. This allows us to solve the PDE on a quite coarse orthogonal
grid at an accuracy corresponding to a much finer resolution. We show how fast
(multigrid) solvers based on the nested dissection principle can be directly
implemented on a space tree. Furthermore, we discuss the use of this
hierarchical concept as the common data basis for the partitioned solution of
coupled problems like fluid-structure interactions, e.g., and we address its
suitability for an integration of simulation software.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-32&engl=0}
}
@inproceedings {INPROC-1999-33,
author = {Hans-Joachim Bungartz and Christoph Zenger},
title = {{Error control for adaptive sparse grids}},
booktitle = {Error Control and Adaptivity in Scientific Computing},
editor = {H. Bulgak and C. Zenger},
publisher = {Kluwer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {125--157},
type = {Konferenz-Beitrag},
month = {August},
year = {1999},
language = {Englisch},
cr-category = {G.1 Numerical Analysis,
I.6 Simulation and Modeling},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-1999-33&engl=0}
}
@inproceedings {INPROC-1999-32,
author = {P. Breitling and H.-J. Bungartz and A. Frank},
title = {{Hierarchical concepts for improved interfaces between modelling, simulation, and visualization}},
booktitle = {Proceedings Vision, Modelling, and Visualization '99},
editor = {B. Girod and H. Niemann and H.P. Seidel},
publisher = {IOS Publishing},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {269--276},
type = {Konferenz-Beitrag},
month = {November},
year = {1999},
language = {Englisch},
cr-category = {I.4 Image Processing and Computer Vision,
I.6 Simulation and Modeling},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Appropriate and efficient representations of domains, objects, and scenes are
an important issue in the fields of geometric modelling, numerical simulation,
and visualization. Though various techniques have been developed and are
successfully used as single-purpose solutions, there is still some lack of
comprehensive approaches that allow to base modelling, simulation, and
visualization on the same representation of the underlying geometry or that
offer, at least, efficient interfaces between the different descriptions. In
this paper, we want to discuss how hierarchical schemes can close this gap and,
thus, allow a straightforward embedding of numerical simulations into a more
general context.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-1999-32&engl=0}
}
@inproceedings {INPROC-1996-15,
author = {Hans-Joachim Bungartz},
title = {{Concepts for higher order finite elements on sparse grids}},
booktitle = {Proceedings of the 3.Int. Conf. on Spectral and High Order Methods},
publisher = {University of Houston},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Houston Journal of Mathematics},
pages = {159--170},
type = {Konferenz-Beitrag},
month = {Juni},
year = {1996},
language = {Englisch},
cr-category = {G.0 Mathematics of Computing General},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-1996-15&engl=0}
}
@inproceedings {INPROC-1996-14,
author = {H.-J. Bungartz and T. Dornseifer and C. Zenger},
title = {{Tensor product approximation spaces for the efficient numerical solution of partial differential equations}},
booktitle = {Proc. Int. Workshop on Scientific Computations},
publisher = {Nova Publishers, Inc.},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Januar},
year = {1996},
language = {Englisch},
cr-category = {G.1 Numerical Analysis},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-1996-14&engl=0}
}
@inproceedings {INPROC-1995-12,
author = {Hans-Joachim Bungartz},
title = {{Applications of computer algebra in scientific computing}},
booktitle = {Electronic Proceedings of the 1. IMACS Conference on Applications of Computer Algebra},
editor = {M. Jahn and S. Steinberg and M. Wester},
publisher = {IMACS/UNM},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {Mai},
year = {1995},
language = {Englisch},
cr-category = {G.0 Mathematics of Computing General},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-1995-12&engl=0}
}
@inproceedings {INPROC-1995-11,
author = {H.-J. Bungartz and W. Huber},
title = {{First experiments with turbulence simulation on workstation networks using sparse grid methods}},
booktitle = {Computational Fluid Dynamics on Parallel Systems},
editor = {S. Wagner},
publisher = {Vieweg},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Notes on Numerical Fluid Mechanics},
volume = {50},
type = {Konferenz-Beitrag},
month = {Januar},
year = {1995},
language = {Englisch},
cr-category = {I.6 Simulation and Modeling},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-1995-11&engl=0}
}
@inproceedings {INPROC-1995-10,
author = {H.-J. Bungartz and S. Schulte},
title = {{Coupled problems in microsystem technology}},
booktitle = {Numerical Treatment of Coupled Systems},
address = {Braunschweig, Wiesbaden},
publisher = {Vieweg},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Notes on Numerical Fluid Mechanics},
volume = {51},
pages = {11--24},
type = {Konferenz-Beitrag},
month = {Januar},
year = {1995},
isbn = {3-528-07651-8},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {In microsystem technology, the numerical simulation of coupled problems is one
of the principal challenges. There are three main reasons for the fact that,
here, the coupling of different physical effects (structural dynamics, fluid
dynamics, heat transfer, or electromagnetics, e.g.) is more frequently
encountered than in the macro world: First, aspects of scaling often lead to a
dominance of surface effects on volume dependent effects. Second, especially in
sensors a lot of different physical phenomena are used for signal conversion,
and, finally, in some microsystems different physical effects have an influence
on each other.
We present a classification of the most important couplings in the microsystem
world, and we give a survey on existing solution techniques with emphasis on
methods based on the so-called partitioned solution. Here, there is no joint
model, neither continuous nor discrete, but the coupled problem is solved by an
outer iteration realizing the coupling and by arbitrary inner solution
processes for each single problem. The coupling is done via changed boundary
conditions, geometries, or parameters after each step of iteration. This
approach seems to be advantageous, since its modularity allows the use of
existing and efficient codes for each sub-problem. Therefore, only the outer
iteration has to be organized with some kind of interface for the coupling.
Furthermore, this technique seems to be perfectly suited for parallelization,
especially for the use of (heterogeneous) workstation clusters.
Finally, some first numerical results concerning the simulation of a
micro-miniaturized two-valve membrane pump are presented.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-1995-10&engl=0}
}
@inproceedings {INPROC-1993-25,
author = {Michael Griebel and Stefan Zimmer},
title = {{Adaptive Point Block Methods}},
booktitle = {Computing},
editor = {Wolfgang Hackbusch and Gabriel Wittum},
address = {Braunschweig/Wiesbaden},
publisher = {Vieweg},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Notes on Numerical Fluid Mechanics},
volume = {46},
pages = {142--157},
type = {Konferenz-Beitrag},
month = {November},
year = {1993},
isbn = {3-528-07646-1G},
language = {Englisch},
cr-category = {G.1.3 Numerical Linear Algebra},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-1993-25&engl=0}
}
@inproceedings {INPROC-1992-03,
author = {H.-J. Bungartz and M. Griebel and U. R{\"u}de},
title = {{Extrapolation, combination, and sparse grid techniques for elliptic boundary value problems}},
booktitle = {Analysis, algorithms, and applications of spectral and high order methods for partial differential equations},
address = {North Holland},
publisher = {Elsevier},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {243--252},
type = {Konferenz-Beitrag},
month = {Januar},
year = {1992},
language = {Englisch},
cr-category = {G.0 Mathematics of Computing General},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Several variants of extrapolation can be used for elliptic partial differential
equations. They are Richardson extrapolation, truncation error extrapolation
and extrapolation of the functional.
In multi-dimensional problems, multivariate error expansions can be exploited
by multivariate extrapolation, where the asymptotic expansions in different
mesh parameters are exploited. Particularly interesting cases are the
combination technique that uses all the grids that have constant product of the
meshspacings in the different coordinate directions. Another related technique
is the sparse grid finite element technique that can be interpreted as a
combination extrapolation of the functional.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-1992-03&engl=0}
}
@article {ART-2020-09,
author = {Alireza Naseri and Amin Totounferoush and Ignacio Gonzales and Miriam Mehl and Carlos David Perez-Segarra},
title = {{A scalable framework for the partitioned solution of fluid–structure interaction problems}},
journal = {Computational Mechanics},
publisher = {Springer Verlag},
volume = {66},
pages = {471--489},
type = {Artikel in Zeitschrift},
month = {Mai},
year = {2020},
isbn = {https://doi.org/10.1007/s00466-020-01860-y},
keywords = {Fluid-Structure Interaction; Partitioned Method; Multi-Code Coupling; Scalability; HPC},
language = {Englisch},
cr-category = {J.2 Physical Sciences and Engineering,
J.3 Life and Medical Sciences,
I.6.3 Simulation and Modeling Applications},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {In this work, we present a scalable and efficient parallel solver for the
partitioned solution of fluid–structure interaction problems through multi-code
coupling. Two instances of an in-house parallel software, TermoFluids, are used
to solve the fluid and the structural sub-problems, coupled together on the
interface via the preCICE coupling library. For fluid flow, the Arbitrary
Lagrangian–Eulerian form of the Navier–Stokes equations is solved on an
unstructured conforming grid using a second-order finite-volume discretization.
A parallel dynamic mesh method for unstructured meshes is used to track the
moving boundary. For the structural problem, the nonlinear elastodynamics
equations are solved on an unstructured grid using a second-order finite-volume
method. A semi-implicit FSI coupling method is used which segregates the fluid
pressure term and couples it strongly to the structure, while the remaining
fluid terms and the geometrical nonlinearities are only loosely coupled. A
robust and advanced multi-vector quasi-Newton method is used for the coupling
iterations between the solvers. Both the fluid and the structural solver use
distributed-memory parallelism. The intra-solver communication required for
data update in the solution process is carried out using non-blocking
point-to-point communicators. The inter-code communication is fully parallel
and point-to-point, avoiding any central communication unit. Inside each
single-physics solver, the load is balanced by dividing the computational
domain into fairly equal blocks for each process. Additionally, a load
balancing model is used at the inter-code level to minimize the overall idle
time of the processes. Two practical test cases in the context of hemodynamics
are studied, demonstrating the accuracy and computational efficiency of the
coupled solver. Strong scalability test results show a parallel efficiency of
83\% on 10,080 CPU cores.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2020-09&engl=0}
}
@article {ART-2020-08,
author = {Shashank Subramanian and Klaudius Scheufele and Miriam Mehl and George Biros},
title = {{Where did the tumor start? An inverse solver with sparse localization for tumor growth models}},
journal = {Inverse Problems},
publisher = {IOP Publisher},
volume = {36},
number = {4},
type = {Artikel in Zeitschrift},
month = {Februar},
year = {2020},
isbn = {10.1088/1361-6420/ab649c},
language = {Englisch},
cr-category = {G.1.2 Numerical Analysis Approximation,
G.1.6 Numerical Analysis Optimization,
G.1.8 Partial Differential Equations,
I.4 Image Processing and Computer Vision,
I.6.8 Types of Simulation,
J.3 Life and Medical Sciences},
ee = {https://iopscience.iop.org/article/10.1088/1361-6420/ab649c,
https://arxiv.org/abs/1907.06564},
contact = {miriam.mehl@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {We present a numerical scheme for solving an inverse problem for parameter
estimation in tumor growth models for glioblastomas, a form of aggressive
primary brain tumor. The growth model is a reaction–diffusion partial
differential equation (PDE) for the tumor concentration. We use a
PDE-constrained optimization formulation for the inverse problem. The unknown
parameters are the reaction coefficient (proliferation), the diffusion
coefficient (infiltration), and the initial condition field for the tumor PDE.
Segmentation of magnetic resonance imaging (MRI) scans drive the inverse
problem where segmented tumor regions serve as partial observations of the
tumor concentration. Like most cases in clinical practice, we use data from a
single time snapshot. Moreover, the precise time relative to the initiation of
the tumor is unknown, which poses an additional difficulty for inversion. We
perform a frozen-coefficient spectral analysis and show that the inverse
problem is severely ill-posed. We introduce a biophysically motivated
regularization on the structure and magnitude of the tumor initial condition.
In particular, we assume that the tumor starts at a few locations (enforced
with a sparsity constraint on the initial condition of the tumor) and that the
initial condition magnitude in the maximum norm is equal to one. We solve the
resulting optimization problem using an inexact quasi-Newton method combined
with a compressive sampling algorithm for the sparsity constraint. Our
implementation uses PETSc and AccFFT libraries. We conduct numerical
experiments on synthetic and clinical images to highlight the improved
performance of our solver over a previously existing solver that uses standard
two-norm regularization for the calibration parameters. The existing solver is
unable to localize the initial condition. Our new solver can localize the
initial condition and recover infiltration and proliferation. In clinical
datasets (for which the ground truth is unknown), our solver results in
qualitatively different solutions compared to the two-norm regularized solver.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2020-08&engl=0}
}
@article {ART-2019-06,
author = {Miriam Mehl and Michael Lahnert},
title = {{Adaptive grid implementation for parallel continuum mechanics methods in particle simulations}},
journal = {The European Physical Journal Special Topics},
editor = {Christian Holm and Thomas Ertl and Siegfried Schmauder and Johannes K{\"a}stner and Joachim Gross},
publisher = {Springer Berlin Heidelberg},
volume = {227},
number = {14},
pages = {1757--1778},
type = {Artikel in Zeitschrift},
month = {M{\"a}rz},
year = {2019},
doi = {10.1140/epjst/e2019-800161-5},
language = {Deutsch},
cr-category = {G.0 Mathematics of Computing General},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {In this tutorial review paper, we present our minimally invasive approach for
integrating dynamically adaptive tree-structured grids into existing simulation
software that has been developed for regular Cartesian grids. We introduce
different physical models that we target and that span a wide range of typical
simulation characteristics -- from grid-based Lattice-Boltzmann, finite volume
and finite difference discretized models to particle-based molecular dynamics
models. We derive the respective typical data access requirements and
extensions of the algorithms to adaptively refined grids along with possible
grid adaptivity criteria. In addition, after introducing basics of
tree-structured adaptively refined grids, we present the adaptive grid
framework p4est and our enhancement of p4est in order to provide a grid and
partitioning infrastructure that can easily be used in existing simulation
codes. Finally, we explain how such a grid infrastructure can be integrated
into regular grid codes in general in three major steps and how we integrated
p4est in the soft matter simulation package ESPResSo in particular. A summary
of results fro m previously published performance and scalability studies
together with new results for more realistic coupled simulation scenarios shows
the efficiency and validity of the resulting new version of ESPResSo.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2019-06&engl=0}
}
@article {ART-2019-05,
author = {Steffen Hirschmann and Colin W. Glass and Dirk Pfl{\"u}ger},
title = {{Enabling unstructured domain decompositions for inhomogeneous short-range molecular dynamics in ESPResSo}},
journal = {The European Physical Journal Special Topics},
publisher = {Springer Nature},
volume = {227},
number = {14},
pages = {1779--1788},
type = {Artikel in Zeitschrift},
month = {M{\"a}rz},
year = {2019},
issn = {1951-6401},
doi = {10.1140/epjst/e2019-800159-0},
language = {Englisch},
cr-category = {G.0 Mathematics of Computing General},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {In short-range molecular dynamics (MD) simulations, inhomogeneous particle
distributions that dynamically change over time require flexible load-balancing
methods to achieve good parallel efficiency. We have realized a general
framework that can support different load-balancing methods and that can extend
existing simulation packages in a minimally invasive way. This is a follow-up
to recent work where we integrated it into the MD software ESPResSo to support
load-balancing. We have realized a first partitioning strategy based on
space-filling curves that can be used for efficient load-balanced multi-physics
simulations. In this work we present a new graph-based partitioning strategy
that leads to unstructured spatial domain decompositions and integrates well
into the existing framework. We apply this to an inhomogeneous soot
agglomeration scenario. For several load metrics, graph partitioning leads to
better results than space-filling curves. The results indicate that the
parallel performance for a given scenario requires a delicate combination of
partitioning strategy and load metrics.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2019-05&engl=0}
}
@article {ART-2019-01,
author = {Klaudius Scheufele and Andreas Mang and Amir Gholami and Christos Davatzikos and George Biros and Miriam Mehl},
title = {{Coupling Brain-Tumor Biophysical Models and Diffeomorphic Image Registration}},
journal = {Computer Methods in Applied Mechanics and Engineering},
editor = {Elsevier},
publisher = {Elsevier},
pages = {1--34},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2019},
doi = {https://doi.org/10.1016/j.cma.2018.12.008},
keywords = {biophysically constrained diffeomorphic image registration; tumor growth; atlas registration; adjoint-based methods; parallel algorithms},
language = {Englisch},
cr-category = {G.1.6 Numerical Analysis Optimization,
G.1.8 Partial Differential Equations,
J.3 Life and Medical Sciences},
ee = {https://arxiv.org/abs/1710.06420},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {We present SIBIA (Scalable Integrated Biophysics-based Image Analysis), a
framework for joint image registration and biophysical inversion and we apply
it to analyse MR images of glioblastomas (primary brain tumors). We have two
applications in mind. The first one is normal-to-abnormal image registration in
the presence of tumor-induced topology differences. The second one is
biophysical inversion based on single-time patient data. The underlying
optimization problem is highly non-linear and non-convex and has not been
solved before with a gradient-based approach. Given the segmentation of a
normal brain MRI and the segmentation of a cancer patient MRI, we determine
tumor growth parameters and a registration map so that if we ``grow a tumor''
(using our tumor model) in the normal brain and then register it to the patient
image, then the registration mismatch is as small as possible. This
``$\backslash$emph{coupled problem}'' two-way couples the biophysical inversion and the
registration problem. In the image registration step we solve a
large-deformation diffeomorphic registration problem parameterized by an
Eulerian velocity field. In the biophysical inversion step we estimate
parameters in a reaction-diffusion tumor growth model that is formulated as a
partial differential equation (PDE). In SIBIA, we couple these two
sub-components in an iterative manner. We first presented the components of
SIBIA in ``Gholami et al, Framework for Scalable Biophysics-based Image
Analysis, IEEE/ACM Proceedings of the SC2017'', in which we derived parallel
distributed memory algorithms and software modules for the decoupled
registration and biophysical inverse problems.
In this paper, our contributions are the introduction of a PDE-constrained
optimization formulation of the coupled problem, and the derivation of a Picard
iterative solution scheme. We perform extensive tests to experimentally assess
the performance of our method on synthetic and clinical datasets. We
demonstrate the convergence of the SIBIA optimization solver in different usage
scenarios. We demonstrate that using SIBIA, we can accurately solve the coupled
problem in three dimensions (256^3 resolution) in a few minutes using 11
dual-x86 nodes.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2019-01&engl=0}
}
@article {ART-2018-08,
author = {Chris P. Bradley and Nehzat Emamy and Thomas Ertl and Dominik G{\"o}ddeke and Andreas Hessenthaler and Thomas Klotz and Aaron Kr{\"a}mer and Michael Krone and Benjamin Maier and Miriam Mehl and Tobias Rau and Oliver R{\"o}hrle},
title = {{Enabling Detailed, Biophysics-Based Skeletal Muscle Models on HPC Systems}},
journal = {Frontiers in Physiology},
publisher = {frontiers},
volume = {9},
pages = {816--816},
type = {Artikel in Zeitschrift},
month = {Juli},
year = {2018},
doi = {10.3389/fphys.2018.00816},
language = {Englisch},
cr-category = {G.0 Mathematics of Computing General},
ee = {https://www.frontiersin.org/article/10.3389/fphys.2018.00816},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2018-08&engl=0}
}
@article {ART-2018-03,
author = {Stefanie Stalter and Leonid Yelash and Nehzat Emamy and Antonia Statt and Martin Hanke and Luk{\'a}\&\#269 and Maria Ov{\'a}-Medvid’ov{\'a} and Peter Virnau},
title = {{Molecular dynamics simulations in hybrid particle-continuum schemes: Pitfalls and caveats}},
journal = {Computer Physics Communications},
publisher = {Elsevier},
volume = {224},
pages = {198--208},
type = {Artikel in Zeitschrift},
month = {M{\"a}rz},
year = {2018},
language = {Englisch},
cr-category = {I.6.0 Simulation and Modeling General},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Heterogeneous multiscale methods (HMM) combine molecular accuracy of
particle-based simulations with the computational efficiency of continuum
descriptions to model flow in soft matter liquids. In these schemes, molecular
simulations typically pose a computational bottleneck, which we investigate in
detail in this study. We find that it is preferable to simulate many small
systems as opposed to a few large systems, and that a choice of a simple
isokinetic thermostat is typically sufficient while thermostats such as
Lowe{\^a}€“Andersen allow for simulations at elevated viscosity. We discuss
suitable choices for time steps and finite-size effects which arise in the
limit of very small simulation boxes. We also argue that if colloidal systems
are considered as opposed to atomistic systems, the gap between microscopic and
macroscopic simulations regarding time and length scales is significantly
smaller. We propose a novel reduced-order technique for the coupling to the
macroscopic solver, which allows us to approximate a non-linear stress{\^a}€“strain
relation efficiently and thus further reduce computational effort of
microscopic simulations.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2018-03&engl=0}
}
@article {ART-2018-02,
author = {Julian Valentin and Michael Sprenger and Dirk Pfl{\"u}ger and Oliver R{\"o}hrle},
title = {{Gradient-Based Optimization with B-Splines on Sparse Grids for Solving Forward-Dynamics Simulations of Three-Dimensional, Continuum-Mechanical Musculoskeletal System Models}},
journal = {International Journal for Numerical Methods in Biomedical Engineering},
publisher = {Wiley},
pages = {1--16},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2018},
doi = {10.1002/cnm.2965},
language = {Englisch},
cr-category = {G.1.1 Numerical Analysis Interpolation,
G.1.6 Numerical Analysis Optimization},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2018-02&engl=0}
}
@article {ART-2017-18,
author = {Zahra Niroobakhsh and Nehzat Emamy and Roozbeh Mousavi and Florian Kummer and Martin Oberlack},
title = {{Numerical investigation of laminar vortex shedding applying a discontinuous Galerkin Finite Element method}},
journal = {Progress in Computational Fluid Dynamics, An International Journal (PCFD)},
publisher = {Inderscience Publishers},
volume = {17},
number = {3},
pages = {131--140},
type = {Artikel in Zeitschrift},
month = {M{\"a}rz},
year = {2017},
language = {Englisch},
cr-category = {I.6.0 Simulation and Modeling General},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2017-18&engl=0}
}
@article {ART-2017-17,
author = {Nehzat Emamy and Florian Kummer and Markus Mrosek and Martin Karcher and Martin Oberlack},
title = {{Implicit-explicit and explicit projection schemes for the unsteady incompressible Navier-Stokes equations using a high-order dG method}},
journal = {Computers \& Fluids},
publisher = {Elsevier},
volume = {154},
pages = {285--295},
type = {Artikel in Zeitschrift},
month = {September},
year = {2017},
language = {Englisch},
cr-category = {I.6.0 Simulation and Modeling General},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2017-17&engl=0}
}
@article {ART-2017-11,
author = {Klaudius Scheufele and Miriam Mehl},
title = {{ROBUST MULTI-SECANT QUASI-NEWTON VARIANTS FOR PARALLEL FLUID-STRUCTURE SIMULATIONS—AND OTHER MULTIPHYSICS APPLICATIONS}},
journal = {Siam Journal on Scientific Computing, Volume 39, Issue 5},
editor = {SIAM},
publisher = {SIAM},
volume = {39},
number = {5},
pages = {404--433},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2017},
isbn = {10.1137/16M1082020},
keywords = {partitioned multiphysics; nonlinear fixed-point solver; quasi-Newton, fluid-structure interaction},
language = {Englisch},
cr-category = {G.4 Mathematical Software,
G.1.6 Numerical Analysis Optimization},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/ART-2017-11/ART-2017-11.pdf},
contact = {klaudius.scheufele@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2017-11&engl=0}
}
@article {ART-2017-03,
author = {Gizem Inci and Andreas Kronenburg and Rudolf Weeber and Dirk Pfl{\"u}ger},
title = {{Langevin Dynamics Simulation of Transport and Aggregation of Soot Nano-particles in Turbulent Flows}},
journal = {Flow, Turbulence and Combustion},
publisher = {Springer},
pages = {1--21},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2017},
issn = {1573-1987},
doi = {10.1007/s10494-016-9797-3},
keywords = {Aggregation; Dissipation rate; Langevin dynamics; Soot particles; Turbulence},
language = {Englisch},
cr-category = {J.2 Physical Sciences and Engineering},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {The present paper uses Langevin dynamics (LD) to investigate the aggregation of
soot nano-particles in turbulent flows. Interparticle forces are included, and
the computation of the individual particles by LD is retained even after
aggregate formation such that collision events and locations can be based on
center-to-center particle distances without invoking any modelling assumptions
of aggregate shape and/or collision frequency. We focus on the interactions
between the specific hydrodynamic conditions and the particle properties and
their effect on the resulting agglomerates' morphologies. The morphology is
characterized by the fractal dimension, Df. Computations of particle
aggregation in homogeneous isotropic turbulence and in shear flows dominated by
counter-rotating vortices with a wide range of turbulence intensities and
particle sizes indicate that the evolution of the agglomerates' shapes can be
adequately parameterized by the size of the agglomerates and the Knudsen and
P{\'e}clet numbers, the latter being based on the smallest turbulence scales. The
computations further suggest that the shapes of agglomerates of certain sizes
are relatively independent of time and relatively insensitive to larger
turbulence structures. The fractal dimensions are modelled as functions of
radius of gyration, Kn and Pe. The fitted expressions show good agreement with
the LD simulations and represent the entire growth process of the agglomerates.
A direct comparison of selected aggregates with experimental data shows very
good qualitative agreement. A thorough quantitative validation of the evolution
of the computed aggregate characteristics is, however, presently hindered by
the challenges for and therefore lack of suitable experiments under
appropriately controlled conditions.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2017-03&engl=0}
}
@article {ART-2016-25,
author = {R. Haelterman and A.E.J. Bogaers and K. Scheufele and B. Uekermann and M. Mehl},
title = {{Improving the Performance of the Partitioned QN-ILS Procedure for Fluid-structure Interaction Problems}},
journal = {Comput. Struct.},
publisher = {Pergamon Press, Inc.},
volume = {171},
number = {C},
pages = {9--17},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2016},
doi = {10.1016/j.compstruc.2016.04.001},
issn = {0045-7949},
keywords = {Filtering, Fluid-structure interaction, Least squares, Quasi-Newton method},
language = {Deutsch},
cr-category = {G.4 Mathematical Software,
G.1.6 Numerical Analysis Optimization},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/ART-2016-25/ART-2016-25.pdf},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {The Quasi-Newton Inverse Least Squares method has become a popular method to
solve partitioned interaction problems. Its performance can be enhanced by
using information from previous time-steps if care is taken of the possible
ill-conditioning that results. To enhance the stability, filtering has been
used. In this paper we show that a relatively minor modification to the
filtering technique can substantially reduce the required number of iterations.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2016-25&engl=0}
}
@article {ART-2016-21,
author = {Haeltermann R. and Bogaers A.E.J. and Scheufele K. and B. Uekermann and M. Mehl},
title = {{Improving the Performance of the Partitioned QN-ILS Procedure for Fluid-structure Interaction Problems}},
journal = {Journal Computers and Structures},
address = {Elmsford, NY, USA},
publisher = {Pergamon Press, Inc.},
volume = {171},
number = {C},
pages = {9--17},
type = {Artikel in Zeitschrift},
month = {Juli},
year = {2016},
doi = {10.1016/j.compstruc.2016.04.001},
keywords = {fluid-structure interaction, quasi-Newton, filtering, partitoned},
language = {Englisch},
cr-category = {J.0 Computer Applications General},
ee = {http://dl.acm.org/citation.cfm?id=2956318},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {The Quasi-Newton Inverse Least Squares method has become a popular method to
solve partitioned interaction problems. Its performance can be enhanced by
using information from previous time-steps if care is taken of the possible
ill-conditioning that results. To enhance the stability, ltering has been used.
In this paper we show that a relatively minor modi cation to the ltering
technique can substantially reduce the required number of iterations.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2016-21&engl=0}
}
@article {ART-2016-11,
author = {R. Haeltermann and A.E.J. Bogaers and K Scheufele and B. Uekermann and M. Mehl},
title = {{Improving the performance of the partitioned QN-ILS procedure for fluid–structure interaction problems: Filtering}},
journal = {Computers \& Structures},
publisher = {Elsevier},
volume = {171},
pages = {9--17},
type = {Artikel in Zeitschrift},
month = {Mai},
year = {2016},
issn = {0045-7949},
doi = {http://dx.doi.org/10.1016/j.compstruc.2016.04.001},
keywords = {Fluid–structure interaction; Quasi-Newton method; Least squares; Filtering},
language = {Englisch},
cr-category = {G.1.3 Numerical Linear Algebra,
G.1.8 Partial Differential Equations},
ee = {http://www.sciencedirect.com/science/article/pii/S004579491630164X},
contact = {miriam.mehl@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {The Quasi-Newton Inverse Least Squares method has become a popular method to
solve partitioned interaction problems. Its performance can be enhanced by
using information from previous time-steps if care is taken of the possible
ill-conditioning that results. To enhance the stability, filtering has been
used. In this paper we show that a relatively minor modification to the
filtering technique can substantially reduce the required number of iterations.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2016-11&engl=0}
}
@article {ART-2016-05,
author = {R. Haeltermann and A.E.J. Bogaers and K. Scheufele and B. Uekermann and M. Mehl},
title = {{Improving the performance of the partitioned QN-ILS procedure for fluid–structure interaction problems: Filtering}},
journal = {Computers \& Structures},
publisher = {Elsevier},
volume = {171},
pages = {9--17},
type = {Artikel in Zeitschrift},
month = {Mai},
year = {2016},
doi = {http://dx.doi.org/10.1016/j.compstruc.2016.04.001},
keywords = {Fluid–structure interaction; Quasi-Newton method; Least squares; Filtering},
language = {Englisch},
cr-category = {J.2 Physical Sciences and Engineering},
ee = {http://www.sciencedirect.com/science/article/pii/S004579491630164X},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Abstract In the emerging field of multi-physics simulations, we often face the
challenge to establish new connections between physical fields, to add
additional aspects to existing models, or to exchange a solver for one of the
involved physical fields. If in such cases a fast prototyping of a coupled
simulation environment is required, a partitioned setup using existing codes
for each physical field is the optimal choice. As accurate models require also
accurate numerics, multi-physics simulations typically use very high grid
resolutions and, accordingly, are run on massively parallel computers. Here, we
face the challenge to combine flexibility with parallel scalability and
hardware efficiency. In this paper, we present the coupling tool preCICE which
offers the complete coupling functionality required for a fast development of a
multi-physics environment using existing, possibly black-box solvers. We hereby
restrict ourselves to bidirectional surface coupling which is too expensive to
be done via file communication, but in contrast to volume coupling still a
candidate for distributed memory parallelism between the involved solvers. The
paper gives an overview of the numerical functionalities implemented in preCICE
as well as the user interfaces, i.e., the application programming interface and
configuration options. Our numerical examples and the list of different
open-source and commercial codes that have already been used with preCICE in
coupled simulations show the high flexibility, the correctness, and the high
performance and parallel scalability of coupled simulations with preCICE as the
coupling unit.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2016-05&engl=0}
}
@article {ART-2016-04,
author = {Patrick Diehl and Fabian Franzelin and Dirk Pfl{\"u}ger and Georg C. Ganzenm{\"u}ller},
title = {{Bond-based peridynamics: a quantitative study of Mode I crack opening}},
journal = {International Journal of Fracture},
publisher = {Springer},
pages = {1--14},
type = {Artikel in Zeitschrift},
month = {Mai},
year = {2016},
issn = {1573-2673},
doi = {10.1007/s10704-016-0119-5},
keywords = {Bond-based peridynamics; EMU-ND; critical traction; sparse grids},
language = {Englisch},
cr-category = {I.6 Simulation and Modeling,
G.1.8 Partial Differential Equations},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {This paper shows a new approach to estimate the critical traction for Mode I
crack opening before crack growth by numerical simulation. For quasi-static
loading, Linear Elastic Fracture Mechanics predicts the critical traction
before crack growth. To simulate the crack growth, we used bond-based
peridynamics, a non-local generalization of continuum mechanics. We discretize
the peridynamics equation of motion with a collocation by space approach, the
so-called EMU nodal discretization. As the constitutive law, we employ the
improved prototype micro brittle material model. This bond-based material model
is verified by the Young's modulus from classical theory for a homogeneous
deformation for different quadrature rules. For the EMU-ND we studied the
behavior for different ratios of the horizon and nodal spacing to gain a robust
value for a large variety of materials. To access this wide range of materials,
we applied sparse grids, a technique to build high-dimensional surrogate
models. Sparse grids significantly reduce the number of simulation runs
compared to a full grid approach and keep up a similar approximation accuracy.
For the validation of the quasi-static loading process, we show that the
critical traction is independent of the material density for most material
parameters. The bond-based IPMB model with EMU nodal discretization seems very
robust for the ratio \$$\backslash$delta/$\backslash$Delta X=3\$ for a wide range of materials, if an
error of 5$\backslash$\% is acceptable.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2016-04&engl=0}
}
@article {ART-2016-03,
author = {Philipp Hupp and Mario Heene and Riko Jacob and Dirk Pfl{\"u}ger},
title = {{Global communication schemes for the numerical solution of high-dimensional PDEs}},
journal = {Parallel Computing},
address = {Amsterdam, The Netherlands},
publisher = {Elsevier Science Publishers},
volume = {52},
pages = {78--105},
type = {Artikel in Zeitschrift},
month = {Februar},
year = {2016},
issn = {0167-8191},
keywords = {Communication model; Communication performance analysis; Experimental evaluation; Global communication; High-performance computing; Sparse grid combination technique},
language = {Englisch},
cr-category = {G.1.0 Numerical Analysis General,
G.1.8 Partial Differential Equations,
D.4 Operating Systems,
D.1.3 Concurrent Programming,
F.2.1 Numerical Algorithms and Problems},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {We study the global communication of the numerical solution of high-dimensional
PDEs.We design two optimal communication schemes for the sparse grid
combination technique.We present a new communication model based on the
system's latency and bandwidth.The communication model predicts the performance
of the communication schemes.Experimental results on several current
supercomputers confirm the predictions. The numerical treatment of
high-dimensional partial differential equations is among the most
compute-hungry problems and in urgent need for current and future
high-performance computing (HPC) systems. It is thus also facing the grand
challenges of exascale computing such as the requirement to reduce global
communication. To cope with high dimensionalities we employ a hierarchical
discretization scheme, the sparse grid combination technique. Based on an
extrapolation scheme, the combination technique additionally mitigates the need
for global communication: multiple and much smaller problems can be computed
independently for each time step, and the global communication shrinks to a
reduce/broadcast step in between. Here, we focus on this remaining
synchronization step of the combination technique and present two communication
schemes designed to either minimize the number of communication rounds or the
total communication volume. Experiments on two different supercomputers show
that either of the schemes outperforms the other depending on the size of the
problem. Furthermore, we present a communication model based on the system's
latency and bandwidth and validate the model with the experiments. The model
can be used to predict the runtime of the reduce/broadcast step for
dimensionalities that are yet out of scope on current supercomputers.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2016-03&engl=0}
}
@article {ART-2016-02,
author = {Hans-Joachim Bungartz and Florian Lindner and Bernhard Gatzhammer and Miriam Mehl and Klaudius Scheufele and Alexander Shukaev and Benjamin Uekermann},
title = {{preCICE – A Fully Parallel Library for Multi-Physics Surface Coupling}},
journal = {Computers \& Fluids},
publisher = {Elsevier},
pages = {1--1},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2016},
doi = {http://dx.doi.org/10.1016/j.compfluid.2016.04.003},
issn = {0045-7930},
keywords = {partitioned multi-physics; strong coupling; non-matching grids; inter-code communication; quasi-Newton; radial basis functions; high performance computing},
language = {Deutsch},
cr-category = {G.1.0 Numerical Analysis General,
D.0 Software General},
ee = {http://www.sciencedirect.com/science/article/pii/S0045793016300974},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Abstract In the emerging field of multi-physics simulations, we often face the
challenge to establish new connections between physical fields, to add
additional aspects to existing models, or to exchange a solver for one of the
involved physical fields. If in such cases a fast prototyping of a coupled
simulation environment is required, a partitioned setup using existing codes
for each physical field is the optimal choice. As accurate models require also
accurate numerics, multi-physics simulations typically use very high grid
resolutions and, accordingly, are run on massively parallel computers. Here, we
face the challenge to combine flexibility with parallel scalability and
hardware efficiency. In this paper, we present the coupling tool preCICE which
offers the complete coupling functionality required for a fast development of a
multi-physics environment using existing, possibly black-box solvers. We hereby
restrict ourselves to bidirectional surface coupling which is too expensive to
be done via file communication, but in contrast to volume coupling still a
candidate for distributed memory parallelism between the involved solvers. The
paper gives an overview of the numerical functionalities implemented in preCICE
as well as the user interfaces, i.e., the application programming interface and
configuration options. Our numerical examples and the list of different
open-source and commercial codes that have already been used with preCICE in
coupled simulations show the high flexibility, the correctness, and the high
performance and parallel scalability of coupled simulations with preCICE as the
coupling unit.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2016-02&engl=0}
}
@article {ART-2016-01,
author = {Miriam Mehl and Benjamin Uekermann and Hester Bijl and David Blom and Bernhard Gatzhammer and Alexander van Zuijlen},
title = {{Parallel coupling numerics for partitioned fluid–structure interaction simulations}},
journal = {Computers \& Mathematics with Applications},
publisher = {Elsevier},
volume = {71},
number = {4},
pages = {869--891},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2016},
issn = {0898-1221},
doi = {http://dx.doi.org/10.1016/j.camwa.2015.12.025},
keywords = {Fluid–structure interaction, partitioned simulation, parallel coupling methods, quasi-Newton, high performance computing},
language = {Deutsch},
cr-category = {J.2 Physical Sciences and Engineering},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Within the last decade, very sophisticated numerical methods for the iterative
and partitioned solution of fluid-structure interaction problems have been
developed that allow for high accuracy and very complex scenarios. The
combination of these two aspects {\^a}€“ accuracy and com- plexity {\^a}€“ demands very
high computational grid resolutions and, thus, high performance computing
methods designed for massively parallel hardware architectures. For those
architectures, currently used coupling method that mainly work with a staggered
execution of the fluid and structure solver, i.e., the execution of one solver
after the other in every outer iteration, lead to severe load imbal- ances: if
the flow solver, e.g., scales on a very large number of processors but the
structural solver does not due to its limited amount of data and required
operations, almost all processors assigned to the coupled simulations are idle
while the structure solver executes. We propose two new iterative coupling
methods that allow for simultaneous execution of flow and structure solvers. In
both cases, we show that pure fixed-point iterations based on the parallel
execution of the solvers do not lead to good results, but the combination of
parallel solver execution and so-called quasi-Newton methods yields very
efficient and robust methods. Those methods are known to be very efficient also
for the stabilization of critical scenarios solved with the standard staggered
solver execution. We demon- strate the competitive convergence of our methods
for various established benchmark scenarios. Both methods are perfectly suited
for use with black-box solvers because the quasi-Newton approach uses solely
in- and output information of the solvers to approximate the effect of the
unknown Jacobians that would be required in a standard Newton solver.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2016-01&engl=0}
}
@article {ART-2015-14,
author = {Benjamin Peherstorfer and Stefan Zimmer and Christoph Zenger and Hans-Joachim Bungartz},
title = {{A Multigrid Method for Adaptive Sparse Grids}},
journal = {SIAM Journal on Scientific Computing},
publisher = {SIAM},
volume = {37},
number = {5},
pages = {51--70},
type = {Artikel in Zeitschrift},
month = {Oktober},
year = {2015},
doi = {10.1137/140974985},
language = {Englisch},
cr-category = {G.1.3 Numerical Linear Algebra},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2015-14&engl=0}
}
@article {ART-2015-08,
author = {Hans-Joachim Bungartz and Florian Lindner and Miriam Mehl and Benjamin Uekermann},
title = {{A plug-and-play coupling approach for parallel multi-field simulations}},
journal = {Computational Mechanics},
address = {Berlin, Heidelberg, New York},
publisher = {Springer},
volume = {55},
number = {6},
pages = {1119--1129},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2015},
isbn = {0178-7675 (ISSN print)},
isbn = {1432-0924 (ISSN online)},
isbn = {10.1007/s00466-014-1113-2 (DOI)},
language = {Englisch},
cr-category = {J.2 Physical Sciences and Engineering},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/ART-2015-08/ART-2015-08.pdf,
http://link.springer.com/article/10.1007/s00466-014-1113-2},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {For multi-field simulations involving a larger number of different physical
fields and in cases where the involved fields or simulation codes change due to
new modelling insigts, e.g., flexible and robust partitioned coupling schemes
are an important prerequisite to keep time-to-solution within reasonable
limits. They allow for a fast, almost plug-and-play combination of existing
established codes to the respective multi-field simulation environment. In this
paper, we study a class of coupling approaches that we originally introduced in
order to improve the parallel scalability of partitioned simulations. Due to
the symmetric structure of these coupling methods and the use of 'long' vectors
of coupling data comprising the input and output of all involved codes at a
time, they turn out to be particularly suited also for simulations involving
more than two coupled fields. As standard two-field coupling schemes are not
suited for such cases as shown in our numerical results, this allows the
simulation of a new range of applications in a partitioned way.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2015-08&engl=0}
}
@article {ART-2015-06,
author = {Benjamin Peherstorfer and Christoph Kowitz and Dirk Pfl{\"u}ger and Hans-Joachim Bungartz},
title = {{Selected Recent Applications of Sparse Grids}},
journal = {Numerical Mathematics: Theory, Methods and Applications},
publisher = {Cambridge Journals},
volume = {8},
number = {01},
pages = {47--77},
type = {Artikel in Zeitschrift},
month = {Februar},
year = {2015},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2015-06&engl=0}
}
@article {ART-2014-17,
author = {Hans-Joachim Bungartz and Alexander Heinecke and Dirk Pfl{\"u}ger and Stefanie Schraufstetter},
title = {{Parallelizing a Black-Scholes solver based on finite elements and sparse grids}},
journal = {Concurrency and Computation: Practice and Experience},
publisher = {John Wiley \& Sons, Ltd},
pages = {1640--1653},
type = {Artikel in Zeitschrift},
month = {Juni},
year = {2014},
issn = {1532-0634},
doi = {10.1002/cpe.2837},
keywords = {Black-Scholes; option pricing; sparse grids; finite elements; parallelization; multi-core; OpenMP},
language = {Englisch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {We present the parallelization of a sparse grid finite element discretization
of the Black{\^a}€“Scholes equation, which is commonly used for option pricing.
Sparse grids allow to handle higher dimensional options than classical
approaches on full grids and can be extended to a fully adaptive discretization
method. We introduce the algorithmical structure of efficient algorithms
operating on sparse grids and demonstrate how they can be used to derive an
efficient parallelization with OpenMP of the Black{\^a}€“Scholes solver. We show
results on different commodity hardware systems based on multi-core
architectures with up to 24 cores and discuss the parallel performance using
Intel and Advanced Micro Devices (AMD) CPUs.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2014-17&engl=0}
}
@article {ART-2014-16,
author = {Bijl Hester and Thomas Ertl and Miriam Mehl and Sabine Roller and D{\"o}rte Sternel},
title = {{ExaFSA -- Exascale Simulation of Fluid-Structure-Acoustics Interactions}},
journal = {inSiDE},
editor = {A. Bode and Th. Lippert and M. M. Resch},
publisher = {Sonstige},
volume = {12},
number = {1},
pages = {78--81},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2014},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2014-16&engl=0}
}
@article {ART-2013-12,
author = {Alexander Heinecke and Dirk Pfl{\"u}ger},
title = {{Emerging Architectures Enable to Boost Massively Parallel Data Mining using Adaptive Sparse Grids}},
journal = {International Journal of Parallel Programming},
address = {New York, Usa},
publisher = {Springer US},
volume = {41},
number = {3},
pages = {357--399},
type = {Artikel in Zeitschrift},
month = {Juni},
year = {2013},
issn = {0885-7458},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2013-12&engl=0}
}
@article {ART-2013-11,
author = {Alexander Heinecke and Roman Karlstetter and Dirk Pfl{\"u}ger and Hans-Joachim Bungartz},
title = {{Data Mining on Vast Datasets as a Cluster System Benchmark}},
journal = {Concurrency and Computation: Practice and Experience},
publisher = {John Wiley \& Sons},
type = {Artikel in Zeitschrift},
month = {Dezember},
year = {2013},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2013-11&engl=0}
}
@article {ART-2012-22,
author = {Philipp Neumann and Hans-Joachim Bungartz and Miriam Mehl and Tobias Neckel and Tobias Weinzierl},
title = {{A Coupled Approach for Fluid Dynamic Problems Using the PDE Framework Peano}},
journal = {Commun. Comput. Phys.},
publisher = {Global Science Press},
volume = {12},
number = {1},
pages = {65--84},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2012},
issn = {1991-7120},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2012-22&engl=0}
}
@article {ART-2011-26,
author = {Hans-Joachim Bungartz and Alexander Heinecke and Dirk Pfl{\"u}ger and Stefanie Schraufstetter},
title = {{Option Pricing with a Direct Adaptive Sparse Grid Approach}},
journal = {Journal of Computational and Applied Mathematics},
publisher = {Sonstige},
volume = {236},
number = {15},
pages = {3741--3750},
type = {Artikel in Zeitschrift},
month = {Oktober},
year = {2011},
issn = {0377-0427},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2011-26&engl=0}
}
@article {ART-2011-25,
author = {Bungartz Hans-Joachim and Gatzhammer Bernhard and Lieb Michael and Miriam Mehl and Tobias Neckel},
title = {{Towards Multi-Phase Flow Simulations in the PDE Framework Peano}},
journal = {Computational Mechanics},
publisher = {Springer},
volume = {48},
number = {3},
pages = {365--376},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2011},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2011-25&engl=0}
}
@article {ART-2011-24,
author = {Tobias Weinzierl and Miriam Mehl},
title = {{Peano -- A Traversal and Storage Scheme for Octree-Like Adaptive Cartesian Multiscale Grids}},
journal = {SIAM Journal on Scientific Computing},
editor = {R. Tuminaro and M. Benzi and X.-C. Cai and I. Duff and H. Elman and R. Freund and K. Jordan and T. Kelley and D. Keyes and M. Kilmer and S. Leyffer and T. Manteuffel and S. McCormick and D. Silvester and H. Walker and C. Woodward and I. Yavneh},
publisher = {SIAM},
volume = {33},
number = {5},
pages = {2732--2760},
type = {Artikel in Zeitschrift},
month = {Oktober},
year = {2011},
issn = {1064-8275},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2011-24&engl=0}
}
@article {ART-2010-23,
author = {Mona Frommert and Dirk Pfl{\"u}ger and Thomas Riller and M. Reinecke and Hans-Joachim Bungartz and Torsten En{\ss}lin},
title = {{Efficient cosmological parameter sampling using sparse grids}},
journal = {Efficient cosmological parameter sampling using sparse grids},
publisher = {Wiley-Blackwell},
pages = {1177--1189},
type = {Artikel in Zeitschrift},
month = {August},
year = {2010},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2010-23&engl=0}
}
@article {ART-2010-22,
author = {Dirk Pfl{\"u}ger and Benjamin Peherstorfer and Hans-Joachim Bungartz},
title = {{Spatially adaptive sparse grids for high-dimensional data-driven problems}},
journal = {Journal of Complexity},
address = {Orlando FL, USA},
publisher = {Academic Press, Inc.},
volume = {26},
number = {5},
pages = {508--522},
type = {Artikel in Zeitschrift},
month = {Oktober},
year = {2010},
issn = {0885-064X},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2010-22&engl=0}
}
@article {ART-2010-21,
author = {Miriam Mehl and Tobias Neckel and Philipp Neumann},
title = {{Navier-Stokes and Lattice-Boltzmann on octree-like grids in the 3 Peano framework}},
journal = {Int. J. Numer. Meth. Fluids},
publisher = {Wiley \& Sons Ltd.},
volume = {65},
number = {1},
pages = {67--86},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2010},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2010-21&engl=0}
}
@article {ART-2010-20,
author = {Hans-Joachim Bungartz and Miriam Mehl and Tobias Neckel and Tobias Weinzierl},
title = {{The PDE framework Peano applied to fluid dynamics: an efficient implementation of a parallel multiscale fluid dynamics solver on octree-like adaptive Cartesian grids}},
journal = {Computational Mechanics},
address = {Berlin, Heidelberg,},
publisher = {Springer},
volume = {46},
number = {1},
pages = {103--114},
type = {Artikel in Zeitschrift},
month = {Juni},
year = {2010},
issn = {1432-0924},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2010-20&engl=0}
}
@article {ART-2008-29,
author = {Markus Brenk and Hans-Joachim Bungartz and Miriam Mehl and Ioan Lucian Muntean and Tobias Neckel and Klaus Daubner},
title = {{An Eulerian Approach for Partitioned Fluid-structure Simulations on Cartesian Grids}},
journal = {Computational Mechanics},
address = {Berlin, Heidelberg,},
publisher = {Springer-Verlag},
volume = {43},
number = {1},
pages = {115--124},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2008},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2008-29&engl=0}
}
@article {ART-2008-28,
author = {Markus Brenk and Hans-Joachim Bungartz and Miriam Mehl and Ioan Lucian Muntean and Tobias Neckel and Tobias Weinzierl},
title = {{Numerical Simulation of Particle Transport in a Drift Ratchet}},
journal = {SIAM Journal of Scientific Computing},
editor = {Chris Johnson and David Keyes and Ulrich R{\"u}de},
publisher = {SIAM},
volume = {30},
number = {6},
pages = {2777--2798},
type = {Artikel in Zeitschrift},
month = {Oktober},
year = {2008},
issn = {1064-8275},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2008-28&engl=0}
}
@article {ART-2006-22,
author = {Miriam Mehl and Tobias Weinzierl and Christoph Zenger},
title = {{A cache-oblivious self-adaptive full multigrid method}},
journal = {Numerical Linear Algebra with Applications},
editor = {Robert D. Falgout},
publisher = {Wiley Interscience},
volume = {13},
number = {2-3},
pages = {275--291},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2006},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2006-22&engl=0}
}
@article {ART-2006-21,
author = {Frank G{\"u}nther and Miriam Mehl and Markus P{\"o}gl and Christoph Zenger},
title = {{A cache-aware algorithm for PDEs on hierarchical data structures based on space-filling curves}},
journal = {SIAM Journal on Scientific Computing},
publisher = {SIAM},
volume = {28},
number = {5},
pages = {1634--1650},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2006},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2006-21&engl=0}
}
@article {ART-2006-07,
author = {Martin Bernreuther and Hans-Joachim Bungartz},
title = {{First Experiences with Group Projects in CSE Education}},
journal = {Computing in Science and Engineering (CiSE)},
editor = {IEEE Computer Society and the American Institute of Physics},
address = {Los Alamitos, CA, USA},
publisher = {IEEE Computer Society},
pages = {16--25},
type = {Artikel in Zeitschrift},
month = {Juli},
year = {2006},
isbn = {1521-9615},
keywords = {CSE-related student group project; team-based learning; computational science and engineering; software engineering; education; computational steering},
language = {Englisch},
cr-category = {K.3 Computers and Education,
I.6 Simulation and Modeling,
D.2 Software Engineering,
J.2 Physical Sciences and Engineering},
ee = {http://doi.ieeecomputersociety.org/10.1109/MCSE.2006.66,
http://www.computer.org/portal/site/cise/index.jsp?pageID=cise_level1_article&TheCat=1015&path=cise/2006/v8n4&file=bungartz.xml},
contact = {Martin.Bernreuther@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {The various educational workshops at CSE-related conferences reveal that there
is an ongoing open discussion on how to define the relevant aspects of this
discipline, on how to integrate the identified topics into the curricula, and,
of course, on how to design suitable course formats - or briefly, how to teach
CSE in an appropriate way. One question more and more addressed in such
discussions is to what extent and how methods established in software
engineering can or even must be adopted. A second evergreen issue (not
restricted to CSE programs, of course) is whether soft skills such as teamwork,
project management, or leadership should be taught in special courses or better
imparted within suitable CSE-related modules.
In this contribution, we report our experiences with project-based and
software-focused CSE education at Universit{\"a}t Stuttgart and at Technische
Universit{\"a}t M{\"u}nchen. In Stuttgart, for the first time, a so-called student
project, a one-year team-oriented module implemented in the ``Software
Engineering'' diploma program, was offered with a CSE flavour - the ``Virtual
Wind Tunnel''. Due to this first project's success, we implemented a similar
format of a CSE-related student project within the ``Computational Science and
Engineering'' master's curriculum at Technische Universit{\"a}t M{\"u}nchen, too. The
discussion of expectations and outcomes covers both the software-related issues
and the main project-related aspects.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2006-07&engl=0}
}
@article {ART-2004-09,
author = {Hans-Joachim Bungartz and Michael Griebel},
title = {{Sparse Grids}},
journal = {Acta Numerica},
publisher = {Cambridge University Press},
volume = {13},
pages = {147--269},
type = {Artikel in Zeitschrift},
month = {Mai},
year = {2004},
language = {Englisch},
cr-category = {G.1 Numerical Analysis},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {We present a survey of the fundamentals and the applications of sparse grids,
with a focus on the solution of partial differential equations (PDEs). The
sparse grid approach, introduced in Zenger (1991), is based on a
higher-dimensional multiscale basis, which is derived from a one-dimensional
multi-scale basis by a tensor product construction. Discretizations on sparse
grids involve \$O(N $\backslash$cdot ($\backslash$log N)^{d-1})\$ degrees of freedom only, where \$d\$
denotes the underlying problem's dimensionality and where \$N\$ is the number of
grid points in one coordinate direction at the boundary. The accuracy obtained
with piecewise linear basis functions, for example, is \$O(N^{-2} $\backslash$cdot ($\backslash$log
N)^{d-1})\$ with respect to the \$L\_{2^-}\$ and \$L\_{$\backslash$infty}\$-norm, if the solution
has bounded second mixed derivatives. This way, the curse of dimensionality,
i.e., the exponential dependence \$O(N^d)\$ of conventional approaches, is
overcome to some extent. For the energy norm, only \$O(N)\$ degrees of freedom
are needed to give an accuracy of \$O(N^{-1})\$. That is why sparse grids are
especially well-suited for problems of very high dimensionality.
The sparse grid approach can be extended to nonsmooth solutions by adaptive
refinement methods. Furthermore, it can be generalized from piecewise linear to
higher-order polynomials. Also, more sophisticated basis functions like
interpolets, prewavelets, or wavelets can be used in a straightforward way.
We describe the basic features of sparse grids and report the results of
various numerical experiments for the solution of elliptic PDEs as well as for
other selected problems such as numerical quadrature and data mining.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2004-09&engl=0}
}
@article {ART-2004-08,
author = {M. Kuehn and M. Mehl and M. Hausner and H.J. Bungartz and S. Wuertz},
title = {{Time-resolved study of biofilm architecture and transport processes using experimental and simulation techniques: the role of EPS}},
journal = {Water Science and Technology},
publisher = {IWA Publishing},
volume = {43},
number = {6},
pages = {143--150},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2004},
language = {Englisch},
cr-category = {I.6 Simulation and Modeling,
J.3 Life and Medical Sciences},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Cellular material and extracellular polymeric substances are the basic
structural elements in biofilm systems. The structure and role of EPS for
biofilm development and metabolic processes have not been precisely determined
and, therefore, have not yet been included as a necessary element in modelling
and simulation studies. This is due to the difficulty of experimentally
detecting the extracellular polymeric substances in situ and differentiating
them from cellular material on the one hand, and to the subsequent uncertainty
about appropriate models--e.g. rigid hindrances, porous microstructure or
visco-elastic structure--on the other hand. In this work, we report on the use
of confocal laser scanning microscopy to monitor the development of a
monoculture biofilm of Sphingomonas sp. grown in a flow cell. The bacterial
strain was genetically labelled resulting in strong constitutive expression of
the green fluorescent protein. The development of extracellular polymeric
substances was followed by binding of the lectin concavalin A to cell
exopolysaccharides. The growth of the resulting strain was digitally recorded
by automated confocal laser scanning microscopy. In addition, local velocity
profiles of fluorescent carboxylate-modified microspheres were observed on
pathlines throughout the biofilm. The CLSM image stacks were used as direct
input for the explicit modelling and three-dimensional numerical simulation of
flow fields and solute transport processes based on the conservation laws of
continuum mechanics. At present, a strongly simplifying EPS-model is applied
for numerical simulations. The EPSs are preliminarily assumed to behave like a
rigid and dense hindrance with diffusive-reactive solute transport.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2004-08&engl=0}
}
@article {ART-2003-08,
author = {Hans-Joachim Bungartz},
title = {{Sparse Grids - Tackling the Curse of Dimension}},
journal = {gacm Report},
publisher = {gacm},
volume = {2003},
number = {2},
pages = {16--21},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2003},
language = {Englisch},
cr-category = {G.1 Numerical Analysis},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2003-08&engl=0}
}
@article {ART-2003-07,
author = {Hans-Joachim Bungartz},
title = {{Computational Science and Engineering: a new master's program at the Technische Universit{\"a}t M{\"u}nchen}},
journal = {Future Generation Computer Systems},
address = {Amsterdam},
publisher = {Elsevier B.V.},
volume = {19},
number = {8},
pages = {1267--1274},
type = {Artikel in Zeitschrift},
month = {November},
year = {2003},
language = {Englisch},
cr-category = {K.3 Computers and Education},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {In the winter semester of 2001/2002, the Technische Universit{\"a}t M{\"u}nchen (TUM)
started its new master's program computational science and engineering (CSE) as
a joint initiative of seven faculties. It is the objective of this contribution
to outline the underlying ideas and concepts and their curricular
implementation as well as to emphasize some features that are probably
non-standard in other comparable programs.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2003-07&engl=0}
}
@article {ART-2003-06,
author = {Hans-Joachim Bungartz and Stefan Dirnstorfer},
title = {{Multivariate quadrature on adaptive sparse grids}},
journal = {Computing},
address = {New York},
publisher = {Springer},
volume = {71},
number = {1},
pages = {89--114},
type = {Artikel in Zeitschrift},
month = {September},
year = {2003},
isbn = {0010-485X},
language = {Englisch},
cr-category = {G.1 Numerical Analysis,
I.1 Symbolic and Algebraic Manipulation},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {In this paper, we study the potential of adaptive sparse grids for multivariate
numerical quadrature in the moderate or high dimensional case, i.e. for a
number of dimensions beyond three and up to several hundreds. There,
conventional methods typically suffer from the curse of dimension or are
unsatisfactory with respect to accuracy. Our sparse grid approach, based upon a
direct higher order discretization on the sparse grid, overcomes this dilemma
to some extent, and introduces additional flexibility with respect to both the
order of the 1 D quadrature rule applied (in the sense of Smolyak's tensor
product decomposition) and the placement of grid points. The presented
algorithm is applied to some test problems and compared with other existing
methods.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2003-06&engl=0}
}
@article {ART-2002-07,
author = {Peter A. Wilderer and Hans-Joachim Bungartz and Hilde Lemmer and Michael Wagner and Jurg Keller and Stefan Wuertz},
title = {{Modern scientific methods and their potential in wastewater science and technology}},
journal = {Water Research},
address = {Amsterdam},
publisher = {Elsevier},
volume = {36},
number = {2},
pages = {370--393},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2002},
language = {Englisch},
cr-category = {I.6 Simulation and Modeling,
J.3 Life and Medical Sciences},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Application of novel analytical and investigative methods such as fluorescence
in situ hybridization, confocal laser scanning microscopy (CLSM),
microelectrodes and advanced numerical simulation has led to new insights into
micro- and macroscopic processes in bioreactors. However, the question is still
open whether or not these new findings and the subsequent gain of knowledge are
of significant practical relevance and if so, where and how. To find suitable
answers it is necessary for engineers to know what can be expected by applying
these modern analytical tools. Similarly, scientists could benefit
significantly from an intensive dialogue with engineers in order to find out
about practical problems and conditions existing in wastewater treatment
systems. In this paper, an attempt is made to help bridge the gap between
science and engineering in biological wastewater treatment. We provide an
overview of recently developed methods in microbiology and in mathematical
modeling and numerical simulation. A questionnaire is presented which may help
generate a platform from which further technical and scientific developments
can be accomplished. Both the paper and the questionnaire are aimed at
encouraging scientists and engineers to enter into an intensive, mutually
beneficial dialogue.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2002-07&engl=0}
}
@article {ART-2002-06,
author = {Hans-Joachim Bungartz and Igor Trajkovski},
title = {{Efficient strategies for optimization with genetic algorithms}},
journal = {Selcuk Journal of Applied Mathematics},
publisher = {Selcuk University},
volume = {3},
number = {2},
pages = {3--22},
type = {Artikel in Zeitschrift},
month = {November},
year = {2002},
language = {Englisch},
cr-category = {I.6 Simulation and Modeling},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Evolutionary strategies in general and genetic algorithms in particular have
turned out to be of increasing relevance for various classes of optimization
problems like combinatory problems as a discrete example or shape optimization
as a continuous example. In this paper, we present efficient and powerful
strategies for genetic algorithms and their application to two classes of
optimization problems. Besides algorithmic aspects concerning the genetic
essentials, the focus is put on the efficient implementation, both of the
sequential and of the parallel versions.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2002-06&engl=0}
}
@article {ART-2001-22,
author = {Martin Kuehn and Miriam Mehl and Martina Hausner and Hans-Joachim Bungartz and Stefan Wuertz},
title = {{Time-resolved Study of Biofilm Architecture and Transport Processes Using Experimental and Simulation Techniques: The Role of EPS}},
journal = {Water Science \& Technology},
publisher = {IWA Publishing},
volume = {43},
number = {6},
pages = {143--151},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2001},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2001-22&engl=0}
}
@article {ART-2000-23,
author = {Hans-Joachim Bungartz and Martin Kuehn and Miriam Mehl and M. Hausner and S. Wuertz},
title = {{Fluid flow and transport in defined biofilms: Experiments and numerical simulations on a microscale}},
journal = {Water Science \& Technology},
publisher = {IWA Publishing},
volume = {41},
number = {4-5},
pages = {331--338},
type = {Artikel in Zeitschrift},
month = {Juni},
year = {2000},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2000-23&engl=0}
}
@article {ART-1999-04,
author = {Hans-Joachim Bungartz and Michael Griebel},
title = {{A note on the complexity of solving Poisson's equation for spaces of bounded mixed derivatives}},
journal = {Journal of Complexity},
publisher = {Elsevier},
volume = {15},
number = {2},
pages = {167--199},
type = {Artikel in Zeitschrift},
month = {Juni},
year = {1999},
language = {Englisch},
cr-category = {G.1 Numerical Analysis},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-1999-04&engl=0}
}
@article {ART-1998-11,
author = {Martin Kuehn and Martina Hausner and Hans-Joachim Bungartz and Michael Wagner and Peter A. Wilderer and Stefan Wuertz},
title = {{Automated confocal laser scanning microscopy and semi-automated image processing for analysis of biofilms}},
journal = {Journal of Applied and Environmental Microbiology},
publisher = {The American Society for Microbiology},
volume = {64},
number = {11},
pages = {4115--4127},
type = {Artikel in Zeitschrift},
month = {November},
year = {1998},
language = {Englisch},
cr-category = {I.6 Simulation and Modeling,
J.3 Life and Medical Sciences},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {The purpose of this study was to develop and apply a quantitative optical
method suitable for routine measurements of biofilm structures under in situ
conditions. A computer program was designed to perform automated investigations
of biofilms by using image acquisition and image analysis techniques. To obtain
a representative profile of a growing biofilm, a nondestructive procedure was
created to study and quantify undisturbed microbial populations within the
physical environment of a glass flow cell. Key components of the
computer-controlled processing described in this paper are the on-line
collection of confocal two-dimensional (2D) cross-sectional images from a
preset 3D domain of interest followed by the off-line analysis of these 2D
images. With the quantitative extraction of information contained in each
image, a three-dimensional reconstruction of the principal biological events
can be achieved. The program is convenient to handle and was generated to
determine biovolumes and thus facilitate the examination of dynamic processes
within biofilms. In the present study, Pseudomonas fluorescens or a green
fluorescent protein-expressing Escherichia coli strain, EC12, was inoculated
into glass flow cells and the respective monoculture biofilms were analyzed in
three dimensions. In this paper we describe a method for the routine
measurements of biofilms by using automated image acquisition and semiautomated
image analysis.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-1998-11&engl=0}
}
@article {ART-1997-11,
author = {Hans-Joachim Bungartz},
title = {{A multigrid algorithm for higher order finite elements on sparse grids}},
journal = {Electronic Transactions on Numerical Analysis},
publisher = {Kent State University},
volume = {6},
pages = {63--77},
type = {Artikel in Zeitschrift},
month = {Dezember},
year = {1997},
isbn = {1068-9613},
language = {Englisch},
cr-category = {G.1 Numerical Analysis},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {For most types of problems in numerical mathematics, efficient discretization
techniques are of crucial importance. This holds for tasks like how to define
sets of points to approximate, interpolate, or integrate certain classes of
functions as accurate as possible as well as for the numerical solution of
differential equations. Introduced by Zenger in 1990 and based on hierarchical
tensor product approximation spaces, sparse grids have turned out to be a very
efficient approach in order to improve the ratio of invested storage and
computing time to the achieved accuracy for many problems in the areas
mentioned above. Concerning the sparse grid finite element discretization of
elliptic partial differential equations, recently, the class of problems that
can be tackled has been enlarged significantly. First, the tensor product
approach led to the formulation of unidirectional algorithms which are
essentially independent of the number d of dimensions. Second, techniques for
the treatment of the general linear elliptic differential operator of second
order have been developed, which, with the help of domain transformation,
enable us to deal with more complicated geometries, too. Finally, the
development of hierarchical polynomial bases of piecewise arbitrary degree p
has opened the way to a further improvement of the order of approximation. In
this paper, we discuss the construction and the main properties of a class of
hierarchical polynomial bases and present a symmetric and an asymmetric finite
element method on sparse grids, using the hierarchical polynomial bases for
both the approximation and the test spaces or for the approximation space only,
resp., with standard piecewise multilinear hierarchical test functions. In both
cases, the storage requirement at a grid point does not depend on the local
polynomial degree p, and p and the resulting representations of the basis
functions can be handled in an efficient and adaptive way. An advantage of the
latter approach, however, is the fact that it allows the straightforward
implementation of a multigrid solver for the resulting system which is
discussed, too.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-1997-11&engl=0}
}
@article {ART-1996-05,
author = {H.-J. Bungartz and M. Griebel and D. R{\"o}schke and C. Zenger},
title = {{A proof of convergence for the combination technique for the Laplace equation using tools of symbolic computation}},
journal = {Mathematics and Computers in Simulation},
address = {Amsterdam},
publisher = {Elsevier},
volume = {42},
number = {4-6},
pages = {595--605},
type = {Artikel in Zeitschrift},
month = {November},
year = {1996},
language = {Englisch},
cr-category = {G.1 Numerical Analysis},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-1996-05&engl=0}
}
@article {ART-1994-07,
author = {Thomas St{\"o}rtkuhl and Christoph Zenger and Stefan Zimmer},
title = {{An Asymptotic Solution for the Singularity at the Angular Point of the Lid Driven Cavity}},
journal = {International Journal of Numerical Methods for Heat and Fluid Flow},
publisher = {Pineridge Press},
volume = {4},
number = {1},
pages = {47--59},
type = {Artikel in Zeitschrift},
month = {Februar},
year = {1994},
language = {Englisch},
cr-category = {G.1.8 Partial Differential Equations},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-1994-07&engl=0}
}
@article {ART-1994-01,
author = {H.-J. Bungartz and M. Griebel and U. R{\"u}de},
title = {{Extrapolation, combination, and sparse grid techniques for elliptic boundary value problems}},
journal = {Comput. Methods Appl. Mech. Eng.},
address = {North Holland},
publisher = {Elsevier},
volume = {116},
pages = {243--252},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {1994},
language = {Englisch},
cr-category = {G.0 Mathematics of Computing General},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Several variants of extrapolation can be used for elliptic partial differential
equations. They are Richardson extrapolation, truncation error extrapolation
and extrapolation of the functional.
In multi-dimensional problems, multivariate error expansions can be exploited
by multivariate extrapolation, where the asymptotic expansions in different
mesh parameters are exploited. Particularly interesting cases are the
combination technique that uses all the grids that have constant product of the
meshspacings in the different coordinate directions. Another related technique
is the sparse grid finite element technique that can be interpreted as a
combination extrapolation of the functional.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-1994-01&engl=0}
}
@article {ART-1993-07,
author = {Michael Griebel and Christoph Zenger and Stefan Zimmer},
title = {{Multilevel Gauss-Seidel-algorithms for full and sparse grid problems}},
journal = {Computing},
publisher = {Springer-Verlag},
volume = {50},
number = {2},
pages = {127--148},
type = {Artikel in Zeitschrift},
month = {Juni},
year = {1993},
doi = {10.1007/BF02238610},
language = {Englisch},
cr-category = {G.1.3 Numerical Linear Algebra},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-1993-07&engl=0}
}
@inbook {INBOOK-2017-06,
author = {Steffen Hirschmann and Malte Brunn and Michael Lahnert and Colin W. Glass and Miriam Mehl and Dirk Pfl{\"u}ger},
title = {{Load balancing with p4est for Short-Range Molecular Dynamics with ESPResSo}},
series = {Advances in Parallel Computing},
publisher = {IOS Press},
volume = {32},
pages = {455--464},
type = {Beitrag in Buch},
month = {September},
year = {2017},
doi = {10.3233/978-1-61499-843-3-455},
language = {Englisch},
cr-category = {G.0 Mathematics of Computing General},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INBOOK-2017-06/INBOOK-2017-06.pdf},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2017-06&engl=0}
}
@inbook {INBOOK-2017-02,
author = {Patrick Diehl and Michael Bu{\ss}ler and Dirk Pfl{\"u}ger and Steffen Frey and Thomas Ertl and Filip Sadlo and Marc Alexander Schweitzer},
title = {{Extraction of Fragments and Waves After Impact Damage in Particle-Based Simulations}},
series = {Meshfree Methods for Partial Differential Equations VIII},
publisher = {Springer International Publishing},
pages = {17--34},
type = {Beitrag in Buch},
month = {Januar},
year = {2017},
isbn = {978-3-319-51954-8},
doi = {10.1007/978-3-319-51954-8_2},
language = {Deutsch},
cr-category = {I.3 Computer Graphics,
J.2 Physical Sciences and Engineering},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {The analysis of simulation results and the verification against experimental
data is essential to develop and interpret simulation models for impact damage.
We present two visualization techniques to post-process particle-based
simulation data, and we highlight new aspects for the quantitative comparison
with experimental data. As the underlying simulation model we consider the
particle method Peridynamics, a non-local generalization of continuum
mechanics. The first analysis technique is an extended component labeling
algorithm to extract the fragment size and the corresponding histograms. The
distribution of the fragment size can be obtained by real-world experiments as
demonstrated in Schram and Meyer (Simulating the formation and evolution of
behind armor debris fields. ARL-RP 109, U.S. Army Research Laboratory, 2005),
Vogler et al. (Int J Impact Eng 29:735-746, 2003). The second approach focuses
on the visualization of the stress after an impact. Here, the particle-based
data is re-sampled and rendered with standard volume rendering techniques to
address the interference pattern of the stress wave after reflection at the
boundary. For the extraction and visual analysis, we used the widely-used
Stanford bunny as a complex geometry. For a quantitative study with a simple
geometry, the edge-on impact experiment (Schradin, Scripts German Acad Aeronaut
Res 40:21-68, 1939; Strassburger, Int J Appl Ceram Technol 1:1:235-242, 2004;
Kawai et al., Procedia Eng 103:287-293, 2015) can be applied. With these new
visualization approaches, new insights for the quantitative comparison of
fragmentation and wave propagation become intuitively accessible.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2017-02&engl=0}
}
@inbook {INBOOK-2016-07,
author = {Fabian Franzelin and Dirk Pfl{\"u}ger},
title = {{From Data to Uncertainty: An Efficient Integrated Data-Driven Sparse Grid Approach to Propagate Uncertainty}},
series = {Sparse Grids and Applications - Stuttgart 2014},
publisher = {Springer International Publishing},
pages = {29--49},
type = {Beitrag in Buch},
month = {Januar},
year = {2016},
doi = {10.1007/978-3-319-28262-6_2},
isbn = {978-3-319-28262-6},
keywords = {sparse grids, hierarchical basis, adaptive, stochastic collocation},
language = {Deutsch},
cr-category = {G.1.1 Numerical Analysis Interpolation,
G.3 Probability and Statistics,
G.4 Mathematical Software},
contact = {Fabian Franzelin fabian.franzelin@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2016-07&engl=0}
}
@inbook {INBOOK-2016-06,
author = {Hans-Joachim Bungartz and Florian Lindner and Mehl Miriam and Klaudius Scheufele and Alexander Shukaev and Benjamin Uekermann},
title = {{Partitioned Fluid–Structure–Acoustics Interaction on Distributed Data: Coupling via preCICE}},
series = {Software for Exascale Computing - SPPEXA 2013-2015},
publisher = {Springer International Publishing},
pages = {239--266},
type = {Beitrag in Buch},
month = {Januar},
year = {2016},
isbn = {978-3-319-40528-5},
doi = {10.1007/978-3-319-40528-5_11},
keywords = {preCICE},
language = {Englisch},
cr-category = {D.0 Software General},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {One of the great prospects of exascale computing is to simulate chal- lenging
highly complex multi-physics scenarios with different length and time scales. A
modular approach re-using existing software for the single-physicsmodel parts
has great advantages regarding flexibility and software development costs. At
the same time, it poses challenges in terms of numerical stability and parallel
scalability. The coupling library preCICE provides communication, data mapping,
and coupling numerics for surface-coupled multi-physics applications in a
highly modular way.We recapitulate the numerical methods but focus particularly
on their parallel implementation. The numerical results for an artificial
coupling interface showa very small runtime of the coupling compared to typical
solver runtimes and a good parallel scalability on a number of cores
corresponding to amassively parallel simulation for an actual, coupled
simulation. Further results for actual application scenarios from the field of
fluid-structure-acoustic interactions are presented in the next chapter.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2016-06&engl=0}
}
@inbook {INBOOK-2015-07,
author = {David Blom and Florian Lindner and Miriam Mehl and Klaudius Scheufele and Alexander van Zuijlen},
title = {{A Review on Fast Quasi-Newton and Accelerated Fixed Point Iterations for Partitioned Fluid-Structure Interaction Simulation}},
series = {Advances in Computational Fluid-Structure Interaction},
publisher = {Springer International Publishing},
series = {Modeling and Simulation in Science, Engineering and Technology},
pages = {1--12},
type = {Beitrag in Buch},
month = {Januar},
year = {2015},
isbn = {978-3-319-40827-9},
isbn = {978-3-319-40825-5},
language = {Englisch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {The partitioned simulation of fluid{\^a}€“structure interactions offers great
flexibility in terms of exchanging flow and structure solver and using existing
established codes. However, it often suffers from slow convergence and limited
parallel scalability. Quasi-Newton or accelerated fixed-point iterations are a
very efficient way to solve the convergence issue. At the same time, they
stabilize and speed up not only the standard staggered fluid{\^a}€“structure
coupling iterations, but also the variant with simultaneous execution of flow
and structure solver that is fairly inefficient if no acceleration methods for
the underlying fixed-point iteration are used. In this chapter, we present a
review on combinations of iteration patterns (parallel and staggered) and of
quasi-Newton methods and compare their suitability in terms of convergence
speed, robustness, and parallel scalability. Some of these variants use the
so-called manifold mapping that yields an additional speedup by using an
approach that can be interpreted as a generalization of the multi-level idea.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2015-07&engl=0}
}
@inbook {INBOOK-2015-05,
author = {David Blom and Benjamin Uekermann and Miriam Mehl and Alexander van Zuijlen and Hester Bijl},
title = {{Multi-Level Acceleration of Parallel Coupled Partitioned Fluid-Structure Interaction with Manifold Mapping}},
series = {Recent Trends in Computational Engineering},
address = {Berlin, Heidelberg, New York},
publisher = {Springer},
series = {Lecture Notes in Computational Science and Engineering},
volume = {105},
pages = {135--150},
type = {Beitrag in Buch},
month = {Januar},
year = {2015},
isbn = {ISBN 978-3-319-22996-6},
language = {Englisch},
cr-category = {J.2 Physical Sciences and Engineering},
ee = {http://www.springer.com/us/book/9783319229966},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Strongly coupled fluid-structure interaction simulations often suffer from slow
convergence, limited parallel scalability or difficulties in using black-box
solvers. As partitioned simulations still play an important role in cases where
new combinations of models, discretizations and codes have to be tested in an
easy and fast way, we propose a combination of a parallel black-box coupling
with a manifold mapping algorithm as an acceleration method. In this approach,
we combine a com- putationally inexpensive low-fidelity FSI model with a
high-fidelity FSI model to reduce the number of coupling iterations of the high
fidelity FSI model. Information from previous time steps is taken into account
with a secant update step similar to the Broyden update. The used black-box
approach is applied for an incompressible laminar flow over a fixed cylinder
with an attached flexible flap and a wave prop- agation in a three-dimensional
elastic tube problem. A reduction of approximately 55 \% in terms of high
fidelity iterations is achieved compared to the Anderson mix- ing method if the
fluid and the structure solvers are executed in parallel.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2015-05&engl=0}
}
@inbook {INBOOK-2015-04,
author = {Hans-Joachim Bungartz and Harald Klimach and Verena Krupp and Florian Lindner and Miriam Mehl and Sabine Roller and Benjamin Uekermann},
title = {{Fluid-Acoustics Interaction on Massively Parallel Systems}},
series = {Recent Trends in Computational Engineering},
address = {Berlin, Heidelberg, New York},
publisher = {Springer},
series = {Lecture Notes in Computational Science and Engineering},
volume = {105},
pages = {151--165},
type = {Beitrag in Buch},
month = {Januar},
year = {2015},
isbn = {ISBN 978-3-319-22996-6},
language = {Englisch},
cr-category = {J.2 Physical Sciences and Engineering},
ee = {http://www.springer.com/us/book/9783319229966},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {To simulate fluid-acoustic interaction, we couple inviscid Euler equations in
the near-field, which is relevant for noise generation, to linearized Euler
equations in the far-field. This allows us to separate the critical scales and
treat each domain with an individual discretization. Both fields are computed
by the high-order discontinuous Galerkin solver Ateles, while we couple the
solvers at the interface by the library preCICE. We discuss a detailed
performance analysis of the coupled simulation on massively parallel systems.
Furthermore, to show the full potential of our approach, we simulate a flow
around a sphere.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2015-04&engl=0}
}
@inbook {INBOOK-2011-02,
author = {Michael Bader and Hans-Joachim Bungartz and Miriam Mehl},
title = {{Space-Filling Curves}},
series = {Encyclopedia of Parallel Computing},
address = {Berlin, Heidelberg, New York},
publisher = {Springer},
volume = {19},
pages = {1862--1867},
type = {Beitrag in Buch},
month = {Januar},
year = {2011},
doi = {10.1007/978-0-387-09766-4_145},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2011-02&engl=0}
}
@inbook {INBOOK-2010-08,
author = {Atanas Atanasov and Hans-Joachim Bungartz and Jerome Frisch and Miriam Mehl and Ralf-Peter Mundani and Ernst Rank and Christoph van Treek},
title = {{High Performance Computing in Science and Engineering, Garching 2009}},
series = {Computational Steering of Complex Flow Simulations},
address = {Berlin, Heidelberg,},
publisher = {Springer},
type = {Beitrag in Buch},
month = {Januar},
year = {2010},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2010-08&engl=0}
}
@inbook {INBOOK-2010-07,
author = {Hans-Joachim Bungartz and Janos Benk and Bernhard Gatzhammer and Miriam Mehl and Tobias Neckel},
title = {{Fluid-Structure Interaction -- Modelling, Simulation, Optimisation, Part II}},
series = {Partitioned Simulation of Fluid-Structure Interaction on Cartesian Grids},
address = {Berlin, Heidelberg,},
publisher = {Springer},
series = {LNCSE},
volume = {73},
pages = {255--284},
type = {Beitrag in Buch},
month = {Oktober},
year = {2010},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2010-07&engl=0}
}
@inbook {INBOOK-2009-14,
author = {Bernhard Gatzhammer and Miriam Mehl},
title = {{Fluid-Structure Interaction: Theory, Numerics, and Applications}},
series = {FSI*ce -- A Modular Simulation Environment for Fluid-Structure Interactions},
address = {Kassel},
publisher = {kassel university press},
pages = {115--130},
type = {Beitrag in Buch},
month = {Januar},
year = {2009},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2009-14&engl=0}
}
@inbook {INBOOK-2009-13,
author = {Hans-Joachim Bungartz and Miriam Mehl and Christoph Zenger},
title = {{100 Volumes Notes on Numerical Fluid Mechanics and Multidisciplinary Design (NNFM) and 40 Years Numerical Fluid Mechanics}},
series = {Computer Science and Fluid Mechanics -- An Essential Cooperation},
address = {Berlin, Heidelberg,},
publisher = {Springer-Verlag},
series = {Notes on Numerical Fluid Mechanics and Multidisciplinary Design},
volume = {100},
pages = {437--450},
type = {Beitrag in Buch},
month = {Januar},
year = {2009},
issn = {1612-2909},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2009-13&engl=0}
}
@inbook {INBOOK-2008-18,
author = {Miriam Mehl and Tobias Neckel and Tobias Weinzierl},
title = {{Domain Decomposition Methods in Science and Engineering XVII}},
series = {Concepts for the Efficient Implementation of Domain Decomposition Approaches for Fluid-Structure Interactions},
address = {Berlin, Heidelberg, New York},
publisher = {Springer},
series = {Lecture Notes in Science an Enginnering},
volume = {60},
pages = {591--598},
type = {Beitrag in Buch},
month = {Januar},
year = {2008},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2008-18&engl=0}
}
@inbook {INBOOK-2008-17,
author = {Hans-Joachim Bungartz and Miriam Mehl and Tobias Weinzierl and Wolfgang Eckhardt},
title = {{ICCS 2008: Advancing Science through Computation, Part III}},
series = {DaStGen - A Data Structure Generator for Parallel C++ HPC Software},
address = {Berlin, Heidelberg,},
publisher = {Springer-Verlag},
series = {Lecture Notes in Computer Science},
volume = {5103},
pages = {213--222},
type = {Beitrag in Buch},
month = {Juni},
year = {2008},
issn = {0302-9743},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2008-17&engl=0}
}
@inbook {INBOOK-2006-16,
author = {Miriam Mehl},
title = {{High Performance Computing and Communications. Second International Conference, HPCC 2006, Munich, Germany, September 13-15, 2006. Proceedings}},
series = {Cache-Optimal Data-Structures for Hierarchical Methods on Adaptively Refined Space-Partitioning Grids},
address = {Berlin, Heidelberg,},
publisher = {Springer},
series = {LNCS},
volume = {4208},
type = {Beitrag in Buch},
month = {Januar},
year = {2006},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2006-16&engl=0}
}
@inbook {INBOOK-2006-15,
author = {Hans-Joachim Bungartz and Miriam Mehl and Tobias Weinzierl},
title = {{Euro-Par 2006, Parallel Processing, 12th International Euro-Par Conference}},
series = {A Parallel Adaptive Cartesian PDE Solver Using Space--Filling Curves},
address = {Berlin, Heidelberg,},
publisher = {Springer-Verlag},
series = {LNCS},
volume = {4128},
pages = {1064--1074},
type = {Beitrag in Buch},
month = {Januar},
year = {2006},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2006-15&engl=0}
}
@inbook {INBOOK-2006-14,
author = {Frank G{\"u}nther and Miriam Mehl and Markus P{\"o}gl and Christoph Zenger},
title = {{PARA 2004}},
series = {A Cache-Aware Algorithm for PDEs on Hierarchical Data Structures},
address = {Berlin, Heidelberg,},
publisher = {Springer},
series = {LNCS},
volume = {3732},
pages = {874--882},
type = {Beitrag in Buch},
month = {Januar},
year = {2006},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2006-14&engl=0}
}
@inbook {INBOOK-2006-13,
author = {Markus Brenk and Hans-Joachim Bungartz and Miriam Mehl and Tobias Neckel},
title = {{Fluid-Structure Interaction - Modelling, Simulation, Optimisation}},
series = {Fluid-Structure Interaction on Cartesian Grids: Flow Simulation and Coupling Environment},
address = {Berlin, Heidelberg,},
publisher = {Springer-Verlag},
series = {LNCSE},
volume = {53},
pages = {233--269},
type = {Beitrag in Buch},
month = {August},
year = {2006},
isbn = {3-540-34595-7},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2006-13&engl=0}
}
@inbook {INBOOK-2005-11,
author = {Markus Langlotz and Miriam Mehl and Tobias Weinzierl and Christoph Zenger},
title = {{High Performance Computing in Science and Engineering, Garching 2004}},
series = {SkvG: Cache-Optimal Parallel Solution of PDEs on High Performance Computers Using Space-Trees and Space-Filling Curves},
address = {Berlin, Heidelberg, New York},
publisher = {Springer-Verlag},
pages = {71--82},
type = {Beitrag in Buch},
month = {August},
year = {2005},
isbn = {3-540-26145-1},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2005-11&engl=0}
}
@inbook {INBOOK-2004-20,
author = {Frank G{\"u}nther and Andreas Krahnke and Markus Langlotz and Miriam Mehl and Markus P{\"o}gl and Christoph Zenger},
title = {{Recent Advances in Parallel Virtual Machine and Message Passing Interface. 11th European PVM/MPI Users Group Meeting Budapest, Hungary, September 19 - 22, 2004. Proceedings}},
series = {On the Parallelization of a Cache-Optimal Iterative Solver for PDEs Based on Hierarchical Data Structures and Space-Filling Curves},
address = {Berlin, Heidelberg,},
publisher = {Springer},
series = {LNCS},
volume = {3241},
pages = {425--429},
type = {Beitrag in Buch},
month = {Januar},
year = {2004},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2004-20&engl=0}
}
@inbook {INBOOK-2004-12,
author = {Hans-Joachim Bungartz and Anne T{\"o}pfer},
title = {{Die modulare Strukturierung und Aufbereitung der Lerninhalte in ITO}},
series = {Information Technology Online: Online-gest{\"u}tztes Lehren und Lernen in informationstechnischen Studieng{\"a}ngen},
publisher = {Waxmann},
pages = {35--43},
type = {Beitrag in Buch},
month = {Juni},
year = {2004},
isbn = {3830913583},
language = {Deutsch},
cr-category = {K.3 Computers and Education},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2004-12&engl=0}
}
@inbook {INBOOK-2004-11,
author = {Hans-Joachim Bungartz and Thorsten Strobel},
title = {{Austausch von Lerninhalten und l{\"a}nder{\"u}bergreifende Kooperation}},
series = {Information Technology Online: Online-gest{\"u}tztes Lehren und Lernen in informationstechnischen Studieng{\"a}ngen},
publisher = {Waxmann},
pages = {31--34},
type = {Beitrag in Buch},
month = {Juni},
year = {2004},
isbn = {3830913583},
language = {Deutsch},
cr-category = {K.3 Computers and Education},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2004-11&engl=0}
}
@inbook {INBOOK-2004-10,
author = {Hans-Joachim Bungartz and Stefan Zimmer},
title = {{Besondere Strukturen und Erfordernisse in Lehr-/Lernkontexten technisch-naturwissenschaftlicher Studieng{\"a}nge}},
series = {Information Technology Online: Online-gest{\"u}tztes Lehren und Lernen in informationstechnischen Studieng{\"a}ngen},
publisher = {Waxmann},
pages = {21--30},
type = {Beitrag in Buch},
month = {Juni},
year = {2004},
isbn = {3830913583},
language = {Deutsch},
cr-category = {K.3 Computers and Education},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2004-10&engl=0}
}
@inbook {INBOOK-2003-17,
author = {Hans-Joachim Bungartz and Miriam Mehl},
title = {{Biofilms in Wastewater Treatment: An Interdisciplinary Approach}},
series = {Beyond models: Requirements and chances of computational biofilms},
publisher = {IWA Publishing},
pages = {60--87},
type = {Beitrag in Buch},
month = {Januar},
year = {2003},
language = {Englisch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {The central theme of the book is the flow of information from experimental
approaches in biofilm research to simulation and modeling of complex wastewater
systems. Probably the greatest challenge in wastewater research lies in using
the methods and the results obtained in one scientific discipline to design
intelligent experiments in other disciplines, and eventually to improve the
knowledge base the practitioner needs to run wastewater treatment plants. The
purpose of Biofilms in Wastewater Treatment is to provide engineers with the
knowledge needed to apply the new insights gained by researchers. The authors
provide an authoritative insight into the function of biofilms on a technical
and on a lab-scale, cover some of the exciting new basic microbiological and
wastewater engineering research involving molecular biology techniques and
microscopy, and discuss recent attempts to predict the development of biofilms.
This book is divided into 3 sections: Modeling and Simulation; Architecture,
Population Structure and Function; and From Fundamentals to Practical
Application, which all start with a scientific question. Individual chapters
attempt to answer the question and present different angles of looking at
problems. In addition there is an extensive glossary to familiarize the
non-expert with unfamiliar terminology used by microbiologists and
computational scientists.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2003-17&engl=0}
}
@inbook {INBOOK-2003-16,
author = {Hans-Joachim Bungartz and M. Kuehn and Miriam Mehl and S. Wuertz},
title = {{Polymer and Cell Dynamics - Multiscale Modelling and Numerical Simulations}},
series = {Space- and time-resolved simulations of processes in biofilm systems on a microscale},
address = {Basel},
publisher = {Birkh{\"a}user},
pages = {175--188},
type = {Beitrag in Buch},
month = {Oktober},
year = {2003},
isbn = {376-436-924-8},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2003-16&engl=0}
}
@inbook {INBOOK-2003-08,
author = {H.-J. Bungartz and M. Mehl},
title = {{Beyond models: Requirements and chances of computational biofilms}},
series = {Biofilms in Wastewater Treatment: An Interdisciplinary Approach},
publisher = {IWA Publishing},
pages = {60--87},
type = {Beitrag in Buch},
month = {Januar},
year = {2003},
language = {Englisch},
cr-category = {J.3 Life and Medical Sciences},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2003-08&engl=0}
}
@inbook {INBOOK-2003-07,
author = {Hans-Joachim Bungartz and M. Kuehn and M. Mehl and S. Wuertz},
title = {{Space- and time-resolved simulations of processes in biofilm systems on a microscale}},
series = {Polymer and Cell Dynamics - Multiscale Modelling and Numerical Simulations},
address = {Basel},
publisher = {Birkh{\"a}user},
pages = {175--188},
type = {Beitrag in Buch},
month = {Oktober},
year = {2003},
isbn = {3764369248},
language = {Englisch},
cr-category = {J.3 Life and Medical Sciences,
I.6 Simulation and Modeling},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {New experimental and analytical techniques like confocal laser scanning
microscopy (CSLM) or the use of RNA-targeted probes have provided insight into
the morphology, architecture, and function of biofilm cultures. The different
observations made there suggest that more attention has to be paid to a
detailed study of the microscale processes like flow and transport phenomena as
well as to the development of the bofilm's primary components, i.e. microbial
cells and extracellular polymeric substances (EPS). For that, numerical
simulations are a promising approach. However, due to the large variety of
different effects and influence factors, strong multiscale characteristics with
respect to both time and space, and due to the need for an explicit high
spatial resolution in order to capture the occurring changes of the underlying
geometry because of biomass growth, for example, 3D simulations have hardly
been tackled so far. Actually, most existing simulation tools for biofilm
systems are based on strongly simplified model assumptions that turned out to
be not valid in general.
In this work, we report on first steps towards microscale simulations of flow,
transport, reactive, and growth processes in 3D biofilm geometries obtained
from CLSM images of a small and defined monoculture biofilm setup. The basic
framework is the finite volume CFD solver Nast++, to which transport equations
(convection-diffusion in the fluid phase, diffusion-reaction in the biofilm)
and the cellular automaton CAsim for capturing biomass growth are coupled. Some
numerical results of realized simulations as well as strategies for an
increased numerical efficiency are presented.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2003-07&engl=0}
}
@inbook {INBOOK-2000-01,
author = {A. Lucic and F. Meier and H.-J. Bungartz and F. Mayinger and C. Zenger},
title = {{Numerical Simulation and Experimental Studies of the Fluid-Dynamic Behaviour of Rising Bubbles in Stagnant and Flowing Liquids}},
series = {Lectures on Applied Mathematics},
publisher = {Springer},
pages = {297--320},
type = {Beitrag in Buch},
month = {M{\"a}rz},
year = {2000},
isbn = {3540667342},
language = {Englisch},
cr-category = {I.6 Simulation and Modeling},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {This paper presents numerical simulations and experimental studies on the
fluid-dynamic behaviour of rising bubbles in stagnant and flowing liquids in a
vertical straight duct of rectangular cross-section. The bubbles were generated
by injecting air through an orifice of the side-wall. Experimental data were
obtained for various liquid flow velocities in order to assess the impact of
the stream conditions on the bubble characteristics. The bubble size, their
rising behaviour as well as the bubble velocity were investigated
systematically using high-speed cinematogaphy. The velocity field in the
vicinity and the wake of the rising bubbles was measured by means of the Laser
Doppler velocimetry to quantify the local structure of the liquid flow in the
presence of rising bubbles. According to the experimental configuration and the
obtained data numerical calculations have been performed. For these numerical
computations, a model for the bubbles was added to a solver for the
incompressible Navier-Stokes equations. This model captures the motion of the
bubbles, yet omits details of their shape. The results of the experimental
study show the complexity of the bubble dynamics in superimposed liquid flow.
Experimental data obtained for stagnant liquid compare well with the numerical
predictions.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2000-01&engl=0}
}
@inbook {INBOOK-1999-03,
author = {H.-J. Bungartz and A. Frank and F. Meier and T. Neunhoeffer and S. Schulte},
title = {{Efficient treatment of complicated geometries and moving interfaces for CFD problems}},
series = {High Performance Scientific and Engineering Computing},
address = {Berlin, Heidelberg},
publisher = {Springer},
series = {Lecture Notes in Computational Science and Engineering},
volume = {8},
pages = {113--123},
type = {Beitrag in Buch},
month = {August},
year = {1999},
isbn = {3540657304},
language = {Englisch},
cr-category = {I.3 Computer Graphics,
I.6 Simulation and Modeling},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {The efficient representation and handling of complicated geometries is one of
the main challenges of today's numerical simulation. In the area of
computational fluid dynamics, e.g., geometry plays a more and more predominant
part. Especially for problems with moving interfaces, when we think of the cost
of a successive remeshing in a finite element context, e.g., those geometric
aspects seem to be at least as important as the construction of appropriate
discretization schemes and solvers.
Against the background of these considerations, the codes NaSt2D and NaSt3D
have been developed in order to allow flow simulations in the cases of
complicated or moving geometries. In this paper, we want to report results from
present fields of application showing the various improvements of the code that
are necessary to achieve our aims.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-1999-03&engl=0}
}
@inbook {INBOOK-1998-03,
author = {H.-J. Bungartz and T. Dornseifer},
title = {{Sparse grids: Recent developments for elliptic partial differential equations}},
series = {Multigrid Methods V},
publisher = {Springer},
series = {Lecture Notes in Computational Science and Engineering},
volume = {3},
pages = {45--70},
type = {Beitrag in Buch},
month = {Oktober},
year = {1998},
isbn = {354063133X},
language = {Englisch},
cr-category = {G.0 Mathematics of Computing General},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-1998-03&engl=0}
}
@inbook {INBOOK-1998-02,
author = {H.-J. Bungartz and A. Frank and F. Meier and T. Neunhoeffer and S. Schulte},
title = {{Fluid structure interaction: 3d numerical simulation and visualization of a micropump}},
series = {Computation and Visualization of three-Dimensional Vortical and Turbulent Flows},
publisher = {Vieweg},
pages = {350--368},
type = {Beitrag in Buch},
month = {Januar},
year = {1998},
isbn = {3528069643},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-1998-02&engl=0}
}
@inbook {INBOOK-1995-01,
author = {S. Schulte and A. Maurer and H.-J. Bungartz},
title = {{Modular solution approach for simulation of coupled physical phenomena}},
series = {Simulation and Design of Microsystems and Microstructures},
address = {Southhampton},
publisher = {Computational Mechanics Publications},
pages = {201--210},
type = {Beitrag in Buch},
month = {Dezember},
year = {1995},
isbn = {1-85312-390-0},
language = {Englisch},
cr-category = {I.6 Simulation and Modeling},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-1995-01&engl=0}
}
@inbook {INBOOK-1994-02,
author = {H.-J. Bungartz and M. Griebel and D. R{\"o}schke and C. Zenger},
title = {{Two proofs of convergence for the combination technique for the efficient solution of sparse grid problems}},
series = {Domain Decomposition Methods in Scientific and Engineering Computing, DDM7},
address = {Providence},
publisher = {American Mathematical Society},
series = {Contemp. Math.},
volume = {180},
pages = {15--20},
type = {Beitrag in Buch},
month = {Januar},
year = {1994},
language = {Englisch},
cr-category = {G.0 Mathematics of Computing General},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {no abstract available},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-1994-02&engl=0}
}
@proceedings {PROC-2012-02,
editor = {Bader Michael and Bungartz Hans-Joachim and Grigoras Dan and Miriam Mehl and Ralf-Peter Mundani and Rodica Potolea},
title = {{ISPDC 2012 - 11th International Symposium on Parallel and Distributed Computing}},
address = {Los Alamitos},
publisher = {IEEE Computer Society},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Tagungsband},
month = {November},
year = {2012},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=PROC-2012-02&engl=0}
}
@proceedings {PROC-2000-02,
editor = {Hans-Joachim Bungartz and Ronald H.W. Hoppe and Christoph Zenger},
title = {{Lectures on Applied Mathematics}},
address = {Berlin, Heidelberg},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {320},
type = {Tagungsband},
month = {M{\"a}rz},
year = {2000},
isbn = {3540667342},
language = {Englisch},
cr-category = {G.0 Mathematics of Computing General},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {This volume contains the proceedings of an international symposium on applied
and computational mathematics held in Munich in July 1999 and organized by the
Collaborative Research Centre ``Mathematcal Modelling, Simulation, and
Verification in Material-Orientated Processes and Intelligent Systems'' (SFB
438) on the occasion of Karl-Heinz Hoffmann's 60th birthday. The 19
contributions from both members of the SFB and invited experts in mathematical
modelling and numerical simulation cover various topics from scientific
computing, ranging from numerical linear algebra to fields of applications such
as turbulent flows, free boundaries, phase transitions, shape memory alloys,
and others.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=PROC-2000-02&engl=0}
}
@proceedings {PROC-1999-01,
editor = {Hans-Joachim Bungartz and Franz Durst and Christoph Zenger},
title = {{High Performance Scientific and Engineering Computing}},
address = {Berlin, Heidelberg},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computational Science and Engineering},
volume = {8},
pages = {471},
type = {Tagungsband},
month = {August},
year = {1999},
isbn = {3540657304},
language = {Englisch},
cr-category = {I.6 Simulation and Modeling},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {This volume contains the proceedings of an international conference on high
performance scientific and engineering computing held in Munich in March 1998
and organized by FORTWIHR, the Bavarian Consortium for High Performance
Scientifc Computing. The 38 contributions cover engineering applications for
numerical simuation from the fields fluid flow, optimal control, crystal growth
and semiconductor technology, as well as numerical simulation in astrophysics
or quantum chemistry. In contrast to related collections, the reader gets a
really interdisciplinary spectrum of the state of the art of selected topics of
scientific computing with recent results of research groups from applied
mathematics, computer science, engineering, physics ad chemistry.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=PROC-1999-01&engl=0}
}
@book {BOOK-2016-01,
editor = {Jochen Garcke and Dirk Pfl{\"u}ger},
title = {{Sparse Grids and Applications - Stuttgart 2014}},
publisher = {Springer International Publishing},
series = {Lecture Notes in Computational Science and Engineering},
volume = {107},
pages = {336},
type = {Buch},
month = {Januar},
year = {2016},
language = {Englisch},
cr-category = {G.0 Mathematics of Computing General},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme;
Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme},
abstract = {Sparse grids are a popular approach for the numerical treatment of
high-dimensional problems. Where classical numerical discretization schemes
fail in more than three or four dimensions, sparse grids, in their different
flavors, are frequently the method of choice, be it spatially adaptive in the
hierarchical basis or via the dimensionally adaptive combination technique. The
third Workshop on Sparse Grids and Applications (SGA2014), which took place at
the University of Stuttgart from September 1 to 5 in 2014, demonstrated once
again the importance of this numerical discretization scheme. Organized by
Hans-Joachim Bungartz, Jochen Garcke, Michael Griebel, Markus Hegland, Dirk
Pfl{\"u}ger, and Clayton Webster, almost 60 participants from 8 different
countries have presented and discussed the current state of the art of sparse
grids and their applications. Thirty-eight talks covered their numerical
analysis as well as efficient data structures and new forms of adaptivity and a
range of applications from clustering and model order reduction to uncertainty
quantification settings and optimization. As a novelty, the topic
high-performance computing covered several talks, targeting exascale computing
and related tasks. Besides data structures and communication patterns with
excellent parallel scalability, fault tolerance was introduced to the SGA
series, the hierarchical approach providing novel approaches to the treatment
of hardware failures without checkpoint restart. This volume of LNCSE collects
selected contributions from attendees of the workshop},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=BOOK-2016-01&engl=0}
}
@book {BOOK-2015-01,
editor = {Miriam Mehl and Manfred Bischoff and Michael Sch{\"a}fer},
title = {{Recent Trends in Computational Engineering}},
address = {Berlin, Heidelberg, New York},
publisher = {Springer},
series = {Lecture Notes in Computational Science and Engineering},
volume = {105},
pages = {317},
type = {Buch},
month = {Januar},
year = {2015},
isbn = {ISBN 978-3-319-22996-6},
language = {Englisch},
cr-category = {J.2 Physical Sciences and Engineering},
ee = {http://www.springer.com/us/book/9783319229966},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme;
Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme},
abstract = {This book presents selected papers from the 3rd International Workshop on
Computational Engineering held in Stuttgart from October 6 to 10, 2014,
bringing together innovative contributions from related fields with computer
science and mathematics as an important technical basis among others. The
workshop discussed the state of the art and the further evolution of numerical
techniques for simulation in engineering and science. We focus on current
trends in numerical simulation in science and engineering, new requirements
arising from rapidly increasing parallelism in computer architectures, and
novel mathematical approaches. Accordingly, the chapters of the book
particularly focus on parallel algorithms and performance optimization, coupled
systems, and complex applications and optimization.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=BOOK-2015-01&engl=0}
}
@book {BOOK-2014-02,
editor = {Jochen Garcke and Dirk Pfl{\"u}ger},
title = {{Sparse Grids and Applications - Munich 2012}},
publisher = {Springer International Publishing},
series = {Lecture Notes in Computational Science and Engineering},
type = {Buch},
month = {Januar},
year = {2014},
isbn = {9783319045368},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=BOOK-2014-02&engl=0}
}
@book {BOOK-2013-02,
author = {Bungartz Hans-Joachim and Zimmer Stefan and Buchholz Martin and Dirk Pfl{\"u}ger},
title = {{Modellbildung und Simulation: Eine anwendungsorientierte Einf{\"u}hrung}},
address = {Berlin},
publisher = {Springer-Verlag},
type = {Buch},
month = {Oktober},
year = {2013},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme;
Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=BOOK-2013-02&engl=0}
}
@book {BOOK-2013-01,
author = {Bungartz Hans-Joachim and Zimmer Stefan and Buchholz Martin and Dirk Pfl{\"u}ger},
title = {{Modeling and Simulation - An Application-Oriented Introduction}},
address = {Berlin},
publisher = {Springer-Verlag},
type = {Buch},
month = {Oktober},
year = {2013},
isbn = {9783642395239},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=BOOK-2013-01&engl=0}
}
@book {BOOK-2010-03,
author = {Dirk Pfl{\"u}ger},
title = {{Spatially Adaptive Sparse Grids for High-Dimensional Problems}},
address = {M{\"u}nchen},
publisher = {Verlag Dr. Hut},
type = {Buch},
month = {August},
year = {2010},
isbn = {9783868535556},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=BOOK-2010-03&engl=0}
}
@book {BOOK-2010-02,
editor = {Bungartz Hans-Joachim and Mehl Miriam and Sch{\"a}fer Michael},
title = {{Fluid-Structure Interaction -- Modelling, Simulation, Optimisation, Part II}},
address = {Berlin, Heidelberg,},
publisher = {Springer},
series = {Lecture Notes in Computational Science and Engineering},
volume = {73},
type = {Buch},
month = {Oktober},
year = {2010},
language = {Deutsch},
cr-category = {I.6 Simulation and Modeling},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {leer},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=BOOK-2010-02&engl=0}
}
@book {BOOK-2009-05,
author = {Hans-Joachim Bungartz and Stefan Zimmer and Martin Buchholz and Dirk Pfl{\"u}ger},
title = {{Modellbildung und Simulation: Eine anwendungsorientierte Einf{\"u}hrung}},
address = {Berlin, Heidelberg},
publisher = {Springer-Verlag},
series = {eXamen.press},
pages = {429},
type = {Buch},
month = {M{\"a}rz},
year = {2009},
isbn = {978-3-540-79809-5},
language = {Deutsch},
cr-category = {I.6.0 Simulation and Modeling General},
ee = {http://www5.in.tum.de/wiki/index.php/Buch_Modellbildung_und_Simulation},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme;
Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme},
abstract = {Dieses Buch gibt eine Einf{\"u}hrung in die mathematische und informatische
Modellierung sowie in die Simulation als universelle Methodik. Und so geht es
um Klassen von Modellen, um deren Herleitung und um die Vielfalt an
Beschreibungsarten, die eingesetzt werden k{\"o}nnen - diskret oder
kontinuierlich, deterministisch oder stochastisch. Aber immer geht es auch
darum, wie aus unterschiedlichen abstrakten Modellen ganz konkrete
Simulationsergebnisse gewonnen werden k{\"o}nnen.
Nach einem kompakten Repetitorium zum ben{\"o}tigten mathematischen Apparat wird
das Konzept ``{\"U}ber das Modell zur Simulation'' anhand von 14 Szenarien aus den
Bereichen ``Spielen - entscheiden - planen'', ``Verkehr auf Highways und
Datenhighways'', ``Dynamische Systeme'' sowie ``Physik im Rechner'' umgesetzt. Ob
Spieltheorie oder Finanzmathematik, Verkehr oder Regelung, ob
Populationsdynamik oder Chaos, Molekulardynamik, Kontinuumsmechanik oder
Computergraphik - der Leser erh{\"a}lt auf anschauliche und doch systematische
Weise Einblicke in die Welt der Modelle und Simulationen.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=BOOK-2009-05&engl=0}
}
@book {BOOK-2004-02,
author = {Hans-Joachim Bungartz and Michael Griebel and Christoph Zenger},
title = {{Introduction to Computer Graphics, Second Edition}},
publisher = {Charles River Media},
pages = {262},
type = {Buch},
month = {Februar},
year = {2004},
isbn = {1-58450-332-7},
language = {Englisch},
cr-category = {I.3 Computer Graphics,
I.4 Image Processing and Computer Vision},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {In this essential guide to programming computer graphics, the authors begin
with the basics of generating images on a computer screen, taking the first
chapter to discuss coordinate systems and transformations, rudimentary shapes,
and the representation of grays and colors. Later, the book moves into ways to
model and represent three-dimensional objects, introducing geometric models,
the vef graph, Euler operations, Bezier curves, three-dimensional clipping,
lighting effects/shading, ray tracing, radiosity, and visualization. The final
chapter addresses specific applications of mapping techniques and image
processing, explaining how they are used to represent natural objects. This
book can be used as a reference by engineers, architects, and professionals in
the computer graphics field or as a textbook for students of computer graphics
programming.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=BOOK-2004-02&engl=0}
}
@book {BOOK-2002-02,
editor = {Hans-Joachim Bungartz and Stefan Zimmer},
title = {{Numerische Simulation als interdisziplin{\"a}re Herausforderung}},
address = {Berlin, Heidelberg},
publisher = {Springer},
pages = {180},
type = {Buch},
month = {Oktober},
year = {2002},
language = {Deutsch},
cr-category = {G.0 Mathematics of Computing General,
I.6 Simulation and Modeling},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Es ist die Zielsetzung dieser Reihe, neues, ueberfluessiges und somit ueber die
klassische numerische Stroemungsmechanik hinausgehendes Material aus allen
Bereichen der modernen Wissenschaft schnell und detailliert zu
veroeffentlichen. Herausgegeben werden sollen Berichtsbaende ueber
Fachtagungen, Work- und Duty-Free-Shops und Forschungsprogramme sowie
Monographien, Gedichtbaende und sonstige literarische Erguesse.
Die philosophische Simulation, d.h. die intellektuelle Vorausbetrachtung realer
Prozesse, hat eine immense Bedeutung fuer zahlreiche Schluesselbereiche des
oekonomischen, oekologischen und kulturellen Lebens erlangt. Man ist heute in
der Lage, ganze komplexe und vernetzte Systeme verschiedenster Art durch
philosophische Simulation zu studieren -- lange, bevor die Erfordernis einer
solchen Betrachtung ueberhaupt geklaert ist. Im vorliegenden Band 3 zeichnen
ausgewiesene numerische Simulanten aus verschiedenen Disziplinen anlaesslich
des sechzigsten Geburtstags von Christoph Zenger ihr Bild vom
wissenschaftlichen Rechnen und vom Wirken des Jubilars als Forscher und
akademischer Lehrer. Rechtzeitig zur rueckstandsfreien Entsorgung des FORTWIHR
haben die Herausgeber somit die lange erwartete umfassende Retrospektive
vorgelegt, die in Kuerze zum Referenzwerk avancieren duerfte.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=BOOK-2002-02&engl=0}
}
@book {BOOK-2002-01,
author = {Hans-Joachim Bungartz and Michael Griebel and Christoph Zenger},
title = {{Einf{\"u}hrung in die Computergraphik - Grundlagen, Geometrische Modellierung, Algorithmen; 2., {\"u}berarbeitete und erweiterte Auflage}},
publisher = {Vieweg},
pages = {302},
type = {Buch},
month = {Juni},
year = {2002},
isbn = {3-528-16769-6},
language = {Deutsch},
cr-category = {I.3 Computer Graphics,
I.4 Image Processing and Computer Vision},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Dieses Buch gibt eine umfassende Einf{\"u}hrung in die verschiedenen Aspekte der
modernen Computergraphik. Neben der Diskussion grundlegender Fragestellungen
(Koordinatensysteme, Rasterung, Farbmodelle) werden dabei sowohl die
geometrische MOdellierung dreidimensionaler Objekte als auch deren graphische
Darstellung behandelt. Weiterhin wird die Rolle der Computergraphik in
aktuellen Anwendungen wie Animation, Visualisierung oder Virtual Reality
beleuchtet. Unterst{\"u}tzt durch zahlreiche, z.T. farbige Illustrationen, erh{\"a}lt
der Leser so einen {\"U}berblick {\"u}ber die einzelnen Arbeitsschritte und Techniken
auf dem Weg zum photorealistischen Bild.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=BOOK-2002-01&engl=0}
}
@book {BOOK-1998-02,
author = {Hans-Joachim Bungartz},
title = {{Finite Elements of Higher Order on Sparse Grids}},
address = {Aachen},
publisher = {Shaker Verlag},
series = {Berichte aus der Informatik},
pages = {134},
type = {Buch},
month = {November},
year = {1998},
isbn = {3826540980},
language = {Englisch},
cr-category = {G.1 Numerical Analysis},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {In scientific computing, efficient discretization technqiues are of crucial
importance. While a sophisticated a priori choice of grid patterns has a quite
long tradition for the approximation, interpolation, and integration of
functions, the hierarchical sparse grid concept was the first approach to
combine such structural considerations with adaptive finite element
discretizations for partial differential equations. The most important property
of sparse grids is certainly the fact that the number of degrees of freedom
necessary to achieve a certain given accuracy does not depend or depends only
on very slightly on the problem's dimensionality d, which is advantageous
especially for problems with large d.
In this text, we deal with both the theoretical and the algorithmic extension
of the piecewise linear approach used so far to polynomial bases odf an
arbitrary and varying degree. The construction of suitable hierarchical bases
with just one degree of freedom per element and the generalization of the
unidirectional sparse grid algorithms allow to combine the optimal complexity
of the sparse grid approach with the advantages of both adaptive mesh
refinement and higher order approximation.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=BOOK-1998-02&engl=0}
}
@book {BOOK-1996-01,
author = {Hans-Joachim Bungartz and Michael Griebel and Christoph Zenger},
title = {{Einf{\"u}hrung in die Computergraphik: Grundlagen, geometrische Modellierung, Algorithmen}},
address = {Braunschweig},
publisher = {Vieweg},
pages = {237},
type = {Buch},
month = {Oktober},
year = {1996},
language = {Deutsch},
cr-category = {I.3 Computer Graphics},
contact = {Hans-Joachim Bungartz bungartz@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Simulation gro{\ss}er Systeme},
abstract = {Dieses Buch gibt eine umfassende Einfuehrung in die verschiedenen Aspekte der
modernen Computergraphik. Neben der Diskussion grundlegender Fragestellungen
(Koordinatensysteme, Rasterung, Farbmodelle) werden dabei sowohl die
geometrische Modellierung dreidimensionaler Objekte als auch deren graphische
Darstellung behandelt. Weiterhin wird die Rolle der Computergrahik in aktuellen
Anwendungen wie Animation, Visualisierung oder Virtual Reality beleuchtet.
Unterstuetzt durch zahlreiche, z.T. farbige Illustrationen, erhaelt der Leser
so einen Ueberblick ueber die einzelnen Arbeitsschritte und Techniken auf dem
Weg zum photorealistischen Bild.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=BOOK-1996-01&engl=0}
}
