Publications VS: Bibliography 2002 BibTeX
@inproceedings {INPROC-2002-30,
author = {Alexander Leonhardi and Kurt Rothermel},
title = {{Architecture of a Large-scale Location Service}},
booktitle = {Short Paper in Proceedings of the 22nd Conference on Distributed Computing Systems : ICDCS 2002; Vienna, Austria, July 2002},
publisher = {IEEE},
institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
pages = {465--466},
type = {Conference Paper},
month = {July},
year = {2002},
keywords = {Location Service; Nexus},
language = {English},
cr-category = {H.0 Information Systems General,
C.2.4 Distributed Systems},
ee = {http://csdl.computer.org/comp/proceedings/icdcs/2002/1585/00/15850465.pdf,
http://www.nexus.uni-stuttgart.de},
contact = {Alexander.Leonhardi@informatik.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
abstract = {Location-aware services are a promising way of exploiting the special
possibilities created by ubiquitous mobile devices and wireless communication.
Advanced locationaware applications will require highly accurate information
about the geographic location of mobile objects and functionality that goes
beyond simply querying the user's position, for example determining all mobile
objects inside a certain geographic area. In this paper, we propose a generic
large-scale location service, which has been designed with the goal of managing
the highly dynamic location information for a large number of mobile objects,
thus providing a common infrastructure that can be employed by location-aware
applications. We propose a hierarchical distributed architecture, which can
efficiently process these queries in a scalable way. To be able to deal with
the frequent updates and queries resulting from highly dynamic location
information, we propose a data storage component, which makes use of a main
memory database.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-30&engl=1}
}
@inproceedings {INPROC-2002-27,
author = {Alexander Leonhardi and Christian Nicu and Kurt Rothermel},
title = {{A Map-based Dead-reckoning Protocol for Updating Location Information}},
booktitle = {Proceedings of the 2nd International Workshop on Parallel and Distributed Computing Issues in Wireless Networks and Mobile Computing (IPDPSWPIM 2002)},
address = {Fort Lauderdale, FL, USA},
publisher = {k.A.},
institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
type = {Conference Paper},
month = {January},
year = {2002},
language = {English},
cr-category = {H Information Systems},
ee = {www.nexus.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
abstract = {k.A.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-27&engl=1}
}
@inproceedings {INPROC-2002-23,
author = {Abdelmajid Khelil and Christian Becker and Jing Tian and Kurt Rothermel},
title = {{An Epidemic Model for Information Diffusion in MANETs}},
booktitle = {Proceedings of the 5th International Workshop on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM'02) at MobiCom 2002},
editor = {Teresa Dahlberg and Michela Meo and Albert Zomaya},
address = {Atlanta, Georgia, USA},
publisher = {ACM PRESS},
institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
series = {ACM MSWiM Proceedings},
pages = {54--60},
type = {Conference Paper},
month = {September},
year = {2002},
isbn = {1-58113-610-2},
keywords = {Algorithms; Performance; Reliability; MANET; analytical modeling; adaptive information diffusion},
language = {English},
cr-category = {C.2.1 Network Architecture and Design,
C.2.2 Network Protocols,
I.6.5 Model Development},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2002-23/INPROC-2002-23.pdf,
http://canu.informatik.uni-stuttgart.de/},
contact = {University of Stuttgart / IPVS Breitwiesenstr. 20-22 70565 Stuttgart, Germany +49 711 7816 {251, 357, 228, 434} {khelil, becker, tian, rothermel}@informatik.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {Choosing appropriate information dissemination strategies is crucial in mobile
ad hoc networks (MANET) due to the frequent topology changes. Flooding-based
approaches like diffusion have a strong similarity with epidemic spreading of
diseases. Applying epidemiological models to information diffusion allows the
evaluation of such strategies depending on the MANET characteristics, e.g. the
node density. In order to choose appropriate strategies at run time, the model
should be easily evaluated.
In this paper, an epidemic model is developed for a simple information
diffusion algorithm based on simulation results. We analytically investigate
the impact of node density on information diffusion. The analytical model
allows the evaluation at runtime, even on devices with restricted resources,
and thus enables mobile nodes to dynamically adapt their diffusion strategies
depending on the local node density.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-23&engl=1}
}
@inproceedings {INPROC-2002-22,
author = {Christian Becker and Martin Bauer and J{\"o}rg H{\"a}hner},
title = {{Usenet-on-the-fly - Supporting Locality of Information in Spontaneous Networking Entironments}},
booktitle = {Workshop on Ad Hoc Communications and Collaboration in Ubiquitous Computing Envirnments},
editor = {Ramiro Liscano and Gerd Kortuem},
publisher = {n/a},
institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
pages = {1--1},
type = {Conference Paper},
month = {November},
year = {2002},
language = {English},
cr-category = {H.4.3 Information Systems Applications Communications Applications,
H.5.3 Group and Organization Interfaces},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2002-22/INPROC-2002-22.pdf},
contact = {christian.becker@informatik.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {People on the move are typically interested in information with respect to
their proximity. Location-based services in general supply users with
information about their proximity typically relying on an infrastructure
storing the information and tracking the mobile objects, i.e. users. In this
paper we present an approach for spontaneous, i.e. ad hoc, networks inspired by
the Usenet. Information is exchanged using a peer-to-peer synchronization
mechanism. The information is made available through channels grouping related
information. The information propagation is solely based on spontaneously
connected devices not requiring any infrastructure. Our prototype
implementation shows the technical feasibility of our approach, whereas
simulation results show the applicability of information diffusion in outdoor
scenarios with a realistic number of nodes, covering a city center.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-22&engl=1}
}
@inproceedings {INPROC-2002-21,
author = {Daniel Herrscher and Kurt Rothermel},
title = {{A Dynamic Network Scenario Emulation Tool}},
booktitle = {Proceedings of the 11th International Conference on Computer Communications and Networks (ICCCN 2002), Miami (FL), Oct 14-16, 2002},
publisher = {IEEE},
institution = {University of Stuttgart, Faculty of Computer Science, Germany},
pages = {262--267},
type = {Conference Paper},
month = {October},
year = {2002},
isbn = {0-7803-7553-X},
keywords = {Network Emulation; Network Scenario; Emulation Tool},
language = {English},
cr-category = {C.2.1 Network Architecture and Design,
C.2.2 Network Protocols},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2002-21/INPROC-2002-21.pdf},
contact = {herrscher@informatik.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {Comparative performance measurements of distributed applications and network
protocols require the availability of appropriate network environments. Network
emulation approaches offer a flexible way to mimic the properties of a variety
of networks. Existing emulation tools work either with centralized real-time
simulation components, limiting the scenario size and maximum traffic, or focus
on the emulation of some network properties at a single point. We propose a
tool for the realistic emulation of network links, and show how several
emulated links can be combined to reproduce a comprehensive network model. In
addition to that, the model can include changing network properties, e.g.
emerging from mobile communication partners. This facilitates the distributed
emulation of a comprehensive, dynamic network scenario to support repeatable
performance measurements.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-21&engl=1}
}
@inproceedings {INPROC-2002-20,
author = {Detlef Bosau and Cora Burger and Arno Wacker and Martin Pfletschinger},
title = {{Context-Sensitive Interaction Support during Augmented Lectures}},
booktitle = {Proceedings of the 7th Cabernet Radicals Workshop},
editor = {Joe Finney and Mads Haahr and Alberto Montresor},
address = {Bertinoro (Forly, Italy)},
publisher = {-},
institution = {University of Stuttgart, Faculty of Computer Science, Germany},
type = {Conference Paper},
month = {October},
year = {2002},
keywords = {e-learning; Application sharing; teaching; mobile computing},
language = {English},
cr-category = {H.4.3 Information Systems Applications Communications Applications},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2002-20/INPROC-2002-20.pdf,
http://www.newcastle.research.ec.org/cabernet/,
http://www.informatik.uni-stuttgart.de/ipvr/vs/en/projects/NUSS/},
contact = {Send an E-Mail to Arno.Wacker@informatik.uni-stuttgart.de or phone +49-711-7816-236},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {With mobile devices and wireless networks, new possibilities evolve to improve
the interaction between teacher and students in class. The paper introduces the
idea of DONUT, a Distributed annOtation tool for Notebook University Teachware,
which is going to be developed within the NUSS (Notebook University Stuttgart)
project being funded by the German Ministry for Education and Research. DONUT
is integrated into an existing framework for application sharing. It is based
on defining and making use of semantic relationships between presented teaching
material and contributions of students. Hence, automatic categorization of
contributions becomes available in advance. This supports the teacher's
decision, whether to integrate contributions into the lecture or postpone them.
Especially, a lot of questions regarding the same topic can indicate problems
in understanding on the side of students quite well.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-20&engl=1}
}
@inproceedings {INPROC-2002-19,
author = {Martin Bauer and Kurt Rothermel},
title = {{Towards the Observation of Spatial Events in Distributed Location-Aware Systems}},
booktitle = {Proceedings of the 22nd International Conference on Distributed Computing Systems Workshops},
editor = {Roland Wagner},
address = {Los Alamitos, California},
publisher = {IEEE Computer Society},
institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
pages = {581--582},
type = {Conference Paper},
month = {July},
year = {2002},
isbn = {0-7695-1588-6},
keywords = {event; event observation; location awareness; Nexus},
language = {English},
cr-category = {C.2.4 Distributed Systems},
ee = {http://www.computer.org/proceedings/icdcsw/1588/15880581.pdf,
http://www.nexus.uni-stuttgart.de},
contact = {Martin Bauer Martin.Bauer@informatik.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {In this paper, the event concept is applied to support the interaction between
mobile users and distributed location-aware systems. Taking a number of
examples, the components of an event specification language are derived that
can be used beyond the domain of location-aware systems.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-19&engl=1}
}
@inproceedings {INPROC-2002-16,
author = {Daniel Herrscher and Alexander Leonhardi and Kurt Rothermel},
title = {{Modeling Computer Networks for Emulation}},
booktitle = {Proceedings of the 2002 International Conference on Parallel and Distributed Processing Techniques and Applications (PDPTA'02), Las Vegas},
publisher = {CSREA Press},
institution = {University of Stuttgart, Faculty of Computer Science, Germany},
pages = {1725--1731},
type = {Conference Paper},
month = {June},
year = {2002},
keywords = {Network Emulation; Modeling Language; Network Topologies},
language = {English},
cr-category = {C.2.1 Network Architecture and Design,
C.2.5 Local and Wide-Area Networks},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2002-16/INPROC-2002-16.pdf},
contact = {herrscher@informatik.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {The Network Emulation Testbed project provides a configurable network
environment for the performance analysis of distributed applications and
protocols. An emulation scenario consists of a network topology, link
parameters, and dynamic change models. In order to set up a scenario
automatically, it has to be modeled in an appropriate description language. In
this paper, we analyze the requirements for an emulation scenario description
language and propose a possible solution.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-16&engl=1}
}
@inproceedings {INPROC-2002-15,
author = {Xuejun Chen},
title = {{Dynamic Reconfiguration of a Component-Based Software System for Vehicles}},
booktitle = {Proceeding of the 15th IFAC World Congress on Automatic Control},
address = {Oxford, UK},
publisher = {Elsevier Science Ltd.},
institution = {University of Stuttgart, Faculty of Computer Science, Germany},
pages = {1--1},
type = {Conference Paper},
month = {July},
year = {2002},
keywords = {Mobile Application; Dynamic Reconfiguration; Distributed System; Update Strategy; Component Deployment Strategy},
language = {English},
cr-category = {D.2 Software Engineering},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {The component system information and management architecture is a component
architecture to build the application software which is used in modern
vehicles. The components are distributed in the system: the individual
components are mainly located in different computers in vehicles, while the
rest runs on computers in the infrastructure. The components can be dynamically
loaded to different places of the component system, executed, removed and
updated at runtime. In this article, we describe dynamic reconfiguration of a
software component system for vehicles. Furthermore, we propose update
strategies for updating components and component deployment strategies for
optimizing the distributed system. By the use of dynamic reconfiguration, the
flexibility and adaptability of the component based distributed system in
vehicles are enhanced. In addition, the dynamic reconfiguration can improve the
performance of the component system and reduce the costs of communication
between a vehicle and the infrastructure.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-15&engl=1}
}
@inproceedings {INPROC-2002-14,
author = {Xuejun Chen and Martin Simons},
title = {{A Component Framework for Dynamic Reconfiguration of Distributed Systems}},
booktitle = {Proceeding of the First International IFIP/ACM Working Conference on Component Deployment (CD 2002)},
publisher = {Springer Verlag},
institution = {University of Stuttgart, Faculty of Computer Science, Germany},
series = {Lecture Notes in Computer Science},
pages = {1--1},
type = {Conference Paper},
month = {June},
year = {2002},
language = {English},
cr-category = {D.2 Software Engineering},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {The growing popularity of wired and wireless Internet requires distributed
systems to be more flexible, adaptive and easily extendable. Dynamic
reconfiguration of distributed component-based systems is one possible solution
to meet these demands. However, current component frameworks that support
dynamic reconfiguration either place the burden of preparing a component for
reconfiguration completely on the component's developer or impose strong
restrictions on the component model and the communication mechanisms. We
investigate a middle ground between these two extremes and propose a component
framework that supports a framework guided reconfiguration and places minimal
burden on the component's developer. This component framework offers mechanisms
to analyze and treat the interactions between the target component and other
components during a dynamic reconfiguration.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-14&engl=1}
}
@inproceedings {INPROC-2002-13,
author = {Xuejun Chen},
title = {{Extending RMI to Support Dynamic Reconfiguration of Distributed Systems}},
booktitle = {Proceeding of the 22nd International Conference on Distributed Computing Systems (ICDCS 2002)},
publisher = {IEEE Computer Society},
institution = {University of Stuttgart, Faculty of Computer Science, Germany},
pages = {1--1},
type = {Conference Paper},
month = {July},
year = {2002},
keywords = {Java RMI; Middleware; Dynamic Reconfiguration; Mobile Object; Distributed Systems},
language = {English},
cr-category = {C.2 Computer-Communication Networks,
D.1 Programming Techniques},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {By the use of the ability of dynamic reconfiguration, the flexibility,
adaptability, and extensibility of distributed systems are enhanced. How to
treat interactions among components during a dynamic reconfiguration is still
one of the most crucial problems in this research area. This challenge should
be met by middleware design and development. However, the current standard
middleware offers little support for dynamic reconfiguration of distributed
systems. In this paper, we describe an extended Java RMI that supports
efficiently dynamic reconfiguration of distributed systems. This extended Java
RMI can automatically monitor and manipulate invocations between components
during a dynamic reconfiguration. Moreover, the extended Java RMI can
automatically switch invocations from remote to local and vice versa.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-13&engl=1}
}
@inproceedings {INPROC-2002-11,
author = {Uwe Kubach and Kurt Rothermel},
title = {{Estimating the Benefit of Location-Awareness for Mobile Data Management Mechanisms}},
booktitle = {Proceedings of the International Conference on Pervasive Computing 2002},
address = {Heidelberg},
publisher = {Springer-Verlag},
institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
pages = {1--14},
type = {Conference Paper},
month = {August},
year = {2002},
keywords = {location awareness; mobile data management; evaluation},
language = {English},
cr-category = {H.2 Database Management},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2002-11/INPROC-2002-11.pdf},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {With the increasing popularity of mobile computing devices, the need to access
information in mobile environments has also grown rapidly. In order to support
such mobile information accesses, location-based services and mobile
information systems often rely on location-aware data management mechanisms
like location-aware caching, data dissemination or prefetching. As we explain
in this paper, the location-awareness of such mechanisms is only useful, if the
accessed information is location-dependent, i.e. if the probability with that a
certain information object is accessed depends on the user’s location. Although
the location-dependency of the accessed information is crucial for the
efficiency of location-aware data management mechanisms and the benefit they
can get out of their location-awareness, no metric to measure the
location-dependency of information has been proposed so far. In this paper, we
describe such a metric together with a second one for a further important
characteristic of mobile information accesses, the so-called focus.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-11&engl=1}
}
@inproceedings {INPROC-2002-10,
author = {Jing Tian and J{\"o}rg H{\"a}hner and Christian Becker and Illya Stepanov and Kurt Rothermel},
title = {{Graph-Based Mobility Model for Mobile Ad Hoc Network Simulation}},
booktitle = {Proceedings of the 35th Annual Simulation Symposium: San Diego, California, April 14-18, 2002},
editor = {IEEE Computer Society Press},
address = {Washington, Brussels, Tokyo},
publisher = {IEEE Computer Society Press},
institution = {University of Stuttgart, Faculty of Computer Science, Germany},
pages = {337--345},
type = {Conference Paper},
month = {April},
year = {2002},
isbn = {0-7695-1552-5},
keywords = {Mobility Model; Mobile Ad Hoc Network; Simulation; Spatial Model},
language = {English},
cr-category = {I.6 Simulation and Modeling,
G.3 Probability and Statistics},
contact = {canu@informatik.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {Imagine a world where people constantly try to pass through walls and cars
suddenly leave the roads and drive into rivers. Although this is unrealistic,
most simulations for mobile ad hoc networks so far are based on the so called
``random walk'' of mobile objects, which are not constrained by their surrounding
spatial environments. In this paper we propose a novel graph-based mobility
model, which provides a more realistic movement than the random walk model by
reflecting the spatial constraints in the real world. We analyzed three
commonly used ad hoc network routing protocols, DSDV, DSR and AODV with both a
random walk-based and our graph-based mobility model. Our simulation results
show that the spatial constraints have a strong impact on the performance of ad
hoc routing protocols.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-10&engl=1}
}
@inproceedings {INPROC-2002-09,
author = {Joachim Jordan and Ulrich Kleinhans and Ottokar Kulendik and J{\"u}rgen Porscha and Alwin Pross and Reiner Siebert},
title = {{Transparent and Flexible Cross-Organizational Workflows for Engineering Cooperations in Vehicle Development}},
booktitle = {PDT Europe 2002},
address = {Torino, Italy},
publisher = {Quality Marketing Services, Sandhurst, UK},
institution = {University of Stuttgart, Faculty of Computer Science, Germany},
pages = {101--108},
type = {Conference Paper},
month = {May},
year = {2002},
isbn = {1 901782 06 9},
keywords = {cross-organizational workflow management; engineering},
language = {English},
cr-category = {H.5.3 Group and Organization Interfaces,
C.2.4 Distributed Systems,
H.4.1 Office Automation,
J.1 Administration Data Processing,
J.2 Physical Sciences and Engineering},
contact = {ottokar.kulendik@informatik.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {Engineering cooperations for vehicle development have proven to be successful
not just to extend capacities but to profit from each other's specific
know-how. Workflow management bears the potential to reduce cooperation
barriers and costs. Within a cooperation project between DaimlerChrysler AG and
EDAG, application scenarios have been defined to identify goals and benefits,
to analyse important requirements, and to develop an IT solution concept,
together with the University of Stuttgart.
Manufacturer and supplier both would profit from 1.) manageable automation of
cross-organizational workflows, 2.) transparency of their partner's processes,
3.) flexibility of specifying own workflows autonomously, and 4.) integration
of heterogeneous workflow management systems. For research, this field of
application is challenging because existing approaches so far do not seem to be
sufficient.
We describe a relevant scenario from an engineering cooperation project in
detail. The resulting requirements do not only occur across companies, but in
general even inside a single company. An appropriate solution should be able to
deal with multiple interactions and some more complex dependencies between
different workflows. It should be possible to make relevant data visible but
keep irrelevant information private, and to support a late evolution of
partner's workflows.
To address those requirements appropriately, our approach minimizes the
specification agreed between the partners, therefore allowing to specify the
associated partner's workflows in a decentralized, delayed manner. External
workflow schemata can be used to give partners a view on each other's workflow.
We use a peer-to-peer architecture in which complex dependencies between
workflows are mapped onto simpler messages.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-09&engl=1}
}
@inproceedings {INPROC-2002-08,
author = {Peter Coschurba and Kurt Rothermel and Frank D{\"u}rr},
title = {{A fine grained addressing concept for GeoCast}},
booktitle = {Trends in Network and Pervasive Computing -- ARCS 2002 (Proceedings of the International Conference on Architecture of Computing Systems 2002)},
editor = {Hartmut Schmeck and Theo Unger and Lars Wolf},
address = {Karlsruhe, Germany},
publisher = {Springer-Verlag},
institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
series = {Lecture Notes in Computer Science},
volume = {2299},
pages = {101--113},
type = {Conference Paper},
month = {April},
year = {2002},
isbn = {3-540-43409-7},
keywords = {routing; location-based services; geographic communication; GeoCast},
language = {English},
cr-category = {C.2 Computer-Communication Networks},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2002-08/INPROC-2002-08.pdf,
http://www.springerlink.com/content/8hcep0e11k61tx53/},
department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
abstract = {GeoCast provides the functionality of sending messages to everyone in a
specific area. So far, only the addressing of larger two-dimensional areas was
possible. For the use in an urban environment it is crucial that small and
three-dimensional areas can be addressed. For example, GeoCast can then be used
to send lecture notes to all in a classroom. In this paper we describe a
fine-grained addressing concept for GeoCast that supports such areas. In
addition we present an architecture that allows the use of that addressing
concept together with the GeoRouting-approach developed by Navas and
Imielinski. We also present some modifications necessary to enhance the
scalability of GeoCast.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-08&engl=1}
}
@inproceedings {INPROC-2002-06,
author = {Cora Burger and Stella Papakosta and Eric Bullinger and Thomas Wagner},
title = {{Investigation of application sharing systems for teaching purposes in engineering disciplines}},
booktitle = {4th International Conference on New Educational Environment 2002},
publisher = {EduSwiss},
institution = {University of Stuttgart, Faculty of Computer Science, Germany},
type = {Conference Paper},
month = {May},
year = {2002},
keywords = {Application Sharing; Wireless Campus; Awareness},
language = {English},
cr-category = {H.4.3 Information Systems Applications Communications Applications},
ee = {http://www.informatik.uni-stuttgart.de/ipvr/vs/projekte/Festival/sascia.html,
http://www.eduswiss.ch/4th-conf/default.asp},
contact = {caburger@informatik.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {With portable devices and wireless networks, a new potential is arising to
improve teaching in collocated, remote and hybrid scenarios. This can be
achieved by a suitable mixture of theoretical and practical elements, where
students can try out applications by themselves during lectures. Existing
systems for application sharing do not cope with the specific requirements of
this environment. Hence, the system SASCIA (System architecture supporting
cooperative and interactive applications) has been developed and tested
successfully.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-06&engl=1}
}
@inproceedings {INPROC-2002-04,
author = {Cora Burger and Stella Papakosta and Kurt Rothermel},
title = {{Application sharing in teaching context with wireless networks}},
booktitle = {Proc. World Congress NETWORKED LEARNING IN A GLOBAL ENVIRONMENT - Challenges and Solutions for Virtual Education},
publisher = {NAISO (Natural and Artificial Intelligence Systems Organization) The Netherlands},
institution = {University of Stuttgart, Faculty of Computer Science, Germany},
type = {Conference Paper},
month = {May},
year = {2002},
keywords = {Application sharing; teaching},
language = {English},
cr-category = {H.4.3 Information Systems Applications Communications Applications},
ee = {http://www.icsc-naiso.org/conferences/nl2002/,
http://www.informatik.uni-stuttgart.de/ipvr/vs/projekte/Festival/sascia.engl.html},
contact = {caburger@informatik.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {The success of teaching is depending on a couple of factors where collaboration
among all participants, teachers and students are the most important ones. With
mobile devices and wireless networks, new possibilities evolve for improvement.
By promoting existing concepts of application sharing systems, the project
SASCIA (System architecture supporting cooperative and interactive
applications) aims at developing a framework for multiple applications to
support teaching in collocated, remote and hybrid scenarios. It provides
annotation and recording to support latecomers and further exceptions as well
as subsequent replay. Moreover, configurable context awareness among
participants as well as floor and consistency control cover a wide spectrum of
applications and learning situations. According to first experiments, the
prototype is performing well and was readily accepted by students.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-04&engl=1}
}
@inproceedings {INPROC-2002-02,
author = {Cora Burger and Eric Bullinger and Stella Papakosta and Thomas Wagner},
title = {{Context awareness for application sharing in teaching environment}},
booktitle = {International Conference on Advances in Infrastructure for e-Business, e-Education, e-Science, and e-Medicine on the Internet},
publisher = {Scuola Superiore G. Reiss Romoli},
institution = {University of Stuttgart, Faculty of Computer Science, Germany},
pages = {00--00},
type = {Conference Paper},
month = {January},
year = {2002},
keywords = {Application sharing, context awareness, teaching},
language = {English},
cr-category = {H.4.3 Information Systems Applications Communications Applications,
H.5.3 Group and Organization Interfaces,
J.1 Administration Data Processing},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2002-02/INPROC-2002-02.ps,
http://www.ssgrr.it/en/ssgrr2002w/index.htm,
http://www.informatik.uni-stuttgart.de/ipvr/vs/projekte/Festival/sascia.html},
contact = {caburger@informatik.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {Mobile and ubiquitous computing offer new possibilities to increase the
awareness in class and support an active participation of students. To this
end, context information is captured and distributed about sessions,
participants and those applications that are used during a lecture or encounter
among students (e. g. presentations, development and simulation environments,
experiments in natural and engineering sciences). The framework of SASCIA
(System Architecture Supporting Cooperative and Interactive Applications) cares
for appropriate usage of this information to enable new ways of application
sharing. First experiments have proofed the usefulness of the system and an
acceptable performance.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2002-02&engl=1}
}
@article {ART-2002-05,
author = {Christian Hauser and Alexander Leonhardi and Paul J. K{\"u}hn},
title = {{Sicherheitsaspekte in Nexus - einer Plattform f{\"u}r ortsbezogene Anwendungen}},
journal = {it+ti, Zeitschrift f{\"u}r Informationstechnik und Technische Informatik},
address = {M{\"u}nchen},
publisher = {Oldenbourg},
volume = {5},
pages = {268--277},
type = {Article in Journal},
month = {October},
year = {2002},
isbn = {0944-2774},
language = {German},
cr-category = {H Information Systems},
ee = {www.nexus.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems;
Universit{\"a}t Stuttgart, Institut f{\"u}r Kommunikationsnetze und Rechnersysteme (IKR)},
abstract = {abstract},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2002-05&engl=1}
}
@article {ART-2002-04,
author = {Martin Bauer and Christian Becker and Kurt Rothermel},
title = {{Location Models from the Perspective of Context-Aware Applications Mobile Ad Hoc Networks}},
journal = {Personal and Ubiquitous Computing},
address = {London},
publisher = {Springer-Verlag},
volume = {6},
number = {5-6},
pages = {322--328},
type = {Article in Journal},
month = {December},
year = {2002},
issn = {1617-4909},
keywords = {context-awareness; location models; ubiquitous computing; MANET; Nexus},
language = {English},
cr-category = {C.2.4 Distributed Systems,
D.2.12 Software Engineering Interoperability,
H.2.3 Database Management Languages},
ee = {http://link.springer.de/link/service/journals/00779/bibs/2006005/20060322.htm,
http://www.nexus.uni-stuttgart.de},
contact = {Martin Bauer Martin.Bauer@informatik.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {Location models are crucial for providing location-dependent data to
context-aware applications. In this paper, we present two approaches for
modeling location information taken from an infrastructure-based and an ad hoc
network-based application scenario. From these approaches we derive
requirements for a general location modeling language for ubiquitous computing.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2002-04&engl=1}
}
@article {ART-2002-01,
author = {Christian Maih{\"o}fer and Kurt Rothermel},
title = {{Optimal Branching Factor for Tree-based Reliable Multicast Protocols}},
journal = {Computer Communications},
editor = {Elsevier},
publisher = {Elsevier},
type = {Article in Journal},
month = {January},
year = {2002},
language = {English},
cr-category = {C.2 Computer-Communication Networks},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/ART-2002-01/ART-2002-01.pdf,
ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/ART-2002-01/ART-2002-01.ps},
contact = {christian.maihoefer@informatik.uni-stuttgart.de},
department = {University of Stuttgart, Institute of Parallel and Distributed High-Performance Systems, Distributed Systems},
abstract = {In recent years, many reliable multicast protocols on transport layer have been
proposed. Previous analysis and simulation studies gave evidence for the
superiority of tree-based approaches in terms of throughput and bandwidth
requirements.
In many tree-based protocols, the nodes of the tree are formed of multicast
group members. In this case, the branching factor, i.e. the maximum number of
child nodes is adjustable. In this paper we analyze the influence of the
branching factor on a protocol's throughput and bandwidth consumption. This
knowledge is important to configure protocols for best performance and to
optimize the tree creation process.
Our results show that the optimal branching factor depends mainly on the
probability for receiving messages from other local groups. If local groups are
assigned to a separate multicast address, the optimal branching factor is
small. On the other hand, if TTL scoping is used and therefore the probability
for receiving messages from other local groups is greater than zero, larger
local groups provide better performance.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2002-01&engl=1}
}
