Publikationen SGS: Bibliographie 2004 BibTeX
@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}
}
@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}
}
@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}
}
@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}
}
