@inproceedings {INPROC-2003-65,
   author = {Illya Stepanov and J{\"o}rg H{\"a}hner and Christian Becker and Jing Tian and Kurt Rothermel},
   title = {{A Meta-Model and Framework for User Mobility in Mobile Networks}},
   booktitle = {Proceedings of the 11th International Conference on Networking 2003 (ICON 2003), Sydney, Australia, September 28 - October 1, 2003},
   publisher = {IEEE},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   pages = {231--238},
   type = {Conference Paper},
   month = {September},
   year = {2003},
   isbn = {0-7803-7788-5},
   keywords = {simulation; mobility modeling; user movement},
   language = {English},
   cr-category = {C.2.1 Network Architecture and Design,
                   C.4 Performance of Systems,
                   I.6.3 Simulation and Modeling Applications},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-65/INPROC-2003-65.pdf,
      http://canu.informatik.uni-stuttgart.de/mobisim},
   contact = {illya.stepanov@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {Mobility patterns play an important role for performance evaluations of mobile
      networks. To simulate user movement, existing simulation tools provide only a
      few simple mobility models (e.g., random movement) suitable for particular
      scenarios. To evaluate a new scenario, an appropriate model needs to be
      created, but this requires extra work that distracts the researcher from
      his/her main task. In general, three key elements determine the mobility of
      users: the spatial environment, the user trip sequences, and the user movement
      dynamics (e.g., speed). In this paper, we introduce a meta-model that
      integrates these three elements in an easy-to-use framework, allowing a
      flexible modeling of user mobility in custom scenarios. The framework is
      available for download as a stand-alone trace generator and may be used
      together with any simulation or emulation tool for mobile networks to evaluate
      a specific scenario.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-65&engl=1}
}

@inproceedings {INPROC-2003-36,
   author = {Jing Tian and Lu Han and Kurt Rothermel and Christian Cseh},
   title = {{Spatially Aware Packet Routing for Mobile Ad Hoc Inter-Vehicle Radio Networks}},
   booktitle = {Proceedings of the IEEE 6th International Conference on Intelligent Transportation Systems (ITSC). Vol. 2},
   publisher = {IEEE},
   institution = {University of Stuttgart, Faculty of Computer Science, Electrical Engineering, and Information Technology, Germany},
   pages = {1546--1552},
   type = {Conference Paper},
   month = {October},
   year = {2003},
   isbn = {0-7803-8125-4},
   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-2003-36/INPROC-2003-36.pdf},
   contact = {jing.tian@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {Inter-Vehicle Communication will become an important building block for ITS
      telematics applications like safety and warning functions. Mobile ad hoc
      networks (MANETs) can serve as a local wireless network for exchanging
      information between cars for cooperative driver assistance applications. For
      the routing of data packets in such large-scale MANETs consisting of vehicles
      on the road, geographic multi-hop packet forwarding is a promising approach.
      However, a main drawback is that it performs poorly in networks with many
      topology holes. In this paper, we propose a spatially aware packet routing
      approach to predict permanent topology holes caused by spatial constraints and
      avoid them aforehand. This approach is generic and can be used in combination
      with any existing geographic forwarding protocol as an extension. Our
      simulations demonstrate that spatial awareness can significantly improve
      geographic forwarding performance in situations with many permanent topology
      holes, like in dynamic vehicle networks.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-36&engl=1}
}

@inproceedings {INPROC-2003-26,
   author = {Marcus Handte and Christian Becker and Gregor Schiele},
   title = {{Experiences: Minimalism and Extensibility in BASE}},
   booktitle = {Proceedings of the System Support for Ubiquitous Computing Workshop (Ubisys03) at the Fifth Annual Conference on Ubiquitous Computing (Ubicomp03); Seattle, Washington, October 12, 2003},
   publisher = {online proceedings},
   institution = {University of Stuttgart, Faculty of Computer Science, Electrical Engineering, and Information Technology, Germany},
   pages = {1--8},
   type = {Conference Paper},
   month = {October},
   year = {2003},
   keywords = {micro-broker; BASE; PCOM; 3PC; ubiquitous computing; pervasive computing; middleware},
   language = {English},
   cr-category = {C.2.4 Distributed Systems,
                   D.2.11 Software Engineering Software Architectures,
                   D.2.12 Software Engineering Interoperability,
                   D.4.4 Operating Systems Communications Management},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-26/INPROC-2003-26.pdf,
      http://ciae.cs.uiuc.edu/ubisys/program.html,
      http://ciae.cs.uiuc.edu/ubisys/},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {In the vision of Ubiquitous Computing everyday objects become smart.
      Technically, this requires some sort of processing and communication
      technology. We have designed and implemented a middleware for spontaneous
      networking in Ubiquitous Computing environments. The major objectives were
      minimalism and extensibility in order to deploy the middleware on a variety of
      devices ranging from sensor nodes to classical general purpose computers. In
      this paper we will assess the taken approach based on two follow-up projects:
      the port of BASE to a small embedded system and the design and implementation
      of a component system on top of BASE. While the fundamental concepts and design
      principles of BASE have proven to be solid, both projects provided insights
      that led to minor conceptual and major technical changes.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-26&engl=1}
}

@inproceedings {INPROC-2003-24,
   author = {Frank D{\"u}rr and Kurt Rothermel},
   title = {{On a Location Model for Fine-Grained Geocast}},
   booktitle = {UbiComp 2003: Ubiquitous Computing (Proceedings of the Fifth International Conference on Ubiquitous Computing 2003); Seattle, WA, October 2003},
   editor = {Anind K. Dey and Albrecht Schmidt and Joseph F. McCarthy},
   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 = {2864},
   pages = {18--35},
   type = {Conference Paper},
   month = {October},
   year = {2003},
   isbn = {3-540-20301-X},
   keywords = {Ubiquitous Computing; Location Model; Geocast},
   language = {English},
   cr-category = {C.2.2 Network Protocols},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-24/INPROC-2003-24.pdf,
      http://www.springerlink.com/content/e9apt8y1w5nmem89/},
   contact = {frank.duerr@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {Geographic communication (geocast) is used to send messages to geographic
      areas, e.g. to distribute warning messages or other information within these
      areas. It is based on a location model which is used to determine a message's
      target area and the receivers' positions and therefore has strong influence on
      the achievable granularity of geographic addressing.
      
      A hybrid location model and and a fine-grained addressing scheme for geocast
      based on this model are presented in this paper which support two- and
      three-dimensional geometric locations as well as symbolic locations like room
      numbers, embedded local coordinate systems, and mobile target areas like
      trains.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-24&engl=1}
}

@inproceedings {INPROC-2003-21,
   author = {Martin Bauer and Lamine Jendoubi and Kurt Rothermel and Engelbert Westk{\"a}mper},
   title = {{Grundlagen ubiquit{\"a}rer Systeme und deren Anwendung in der ``Smart Factory''}},
   booktitle = {Industrie Management - Zeitschrift f{\"u}r industrielle Gesch{\"a}ftsprozesse},
   editor = {Norbert Gronau and Hermann Krallmann and Bernd Scholz-Reiter},
   address = {Berlin},
   publisher = {GITO mbH Verlag f{\"u}r Industrielle Organisation},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   volume = {19},
   number = {6},
   pages = {17--20},
   type = {Conference Paper},
   month = {December},
   year = {2003},
   keywords = {Smart Factory; Ubiquitous Computing; R{\"a}umliche Umgebungsmodelle; kontext-bezogene Systeme; context-aware systems; spatial world models; Nexus},
   language = {German},
   cr-category = {C.2.4 Distributed Systems,
                   H.2.4 Database Management Systems,
                   H.2.8 Database Applications,
                   H.3.4 Information Storage and Retrieval Systems and Software,
                   J.1 Administration Data Processing,
                   J.7 Computers in Other Systems},
   ee = {http://www.nexus.uni-stuttgart.de,
      http://www.industrie-management.de},
   contact = {Kurt.Rothermel@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems;
                  Universit{\"a}t Stuttgart, Institut f{\"u}r Industrielle Fertigung und Fabrikbetrieb (IFF)},
   abstract = {Die rasch fortschreitende Entwicklung kleiner mobiler Ger{\"a}te sowie mit
      eingebetteter Sensorik und Aktorik versehener Alltagsgegenst{\"a}nde erm{\"o}glicht
      eine Vielzahl neuartiger Anwendungen. Die F{\"a}higkeit zur drahtlosen
      Kommunikation und zur Positionsbestimmung bereitet die Basis lokations- und
      kontextbezogener Systeme, die seit einigen Jahren im Projekt Nexus an der
      Universit{\"a}t Stuttgart untersucht werden. Der Einsatz dieser Technologien im
      produktionstechnischem Umfeld, z.B. der hier vorgestellten dezentralen
      Betriebsmittelverwaltung, er{\"o}ffnet dabei ein vollkommen neues Anwendungsgebiet.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-21&engl=1}
}

@inproceedings {INPROC-2003-20,
   author = {Kurt Rothermel and Dominique Dudkowski and Frank D{\"u}rr and Martin Bauer and Christian Becker},
   title = {{Ubiquitous Computing - More than Computing Anytime Anyplace?}},
   booktitle = {Proceedings of the 49. Photogrammetrische Woche},
   address = {Stuttgart},
   publisher = {ifp},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   type = {Conference Paper},
   month = {September},
   year = {2003},
   keywords = {Kontext; kontextbezogene Systeme; Ubiquitous Computing; Nexus},
   language = {German},
   cr-category = {H.2.8 Database Applications,
                   H.3.4 Information Storage and Retrieval Systems and Software},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-20/INPROC-2003-20.pdf,
      http://www.nexus.uni-stuttgart.de},
   contact = {Kurt.Rothermel@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {The rapid development of mobile communication networks and the availability of
      miniaturized and inexpensive sensor technology allow for the development of
      multifunctional mobile devices that are able to collect and communicate context
      information. We also currently see a clear trend towards the integration of
      embedded systems including sensors into {\ss}mart`` everyday things, which is also
      referred to as Ubiquitous Computing. The deployment of sensor technology allows
      for so-called context-aware applications, going far beyond of providing mobile
      access to information and computing resources. Context-aware applications
      exploit captured sensor information to adapt to the current situation of mobile
      users. For instance, the information offered to a user may depend on his
      current location, and the way how it is presented to him may depend on the
      speed he moves, whether he is on its own or with others, and so on.
      
      In this paper, we characterize context-aware applications and present the
      vision of a digital world model as the foundation for this class of
      applications. Further, the paper discusses the benefits and reseach challenges
      associated with digital world models, which allow applications to take into
      account the state of the real world and react to state changes.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-20&engl=1}
}

@inproceedings {INPROC-2003-19,
   author = {Audun J{\o}sang and Elizabeth Gray and Michael Kinateder},
   title = {{Analysing Topologies of Transitive Trust}},
   booktitle = {Proceedings of the First International Workshop on Formal Aspects in Security \& Trust: FAST 2003; Pisa, Italy, September 2003},
   publisher = {IIT-CNR},
   institution = {University of Stuttgart, Faculty of Computer Science, Electrical Engineering, and Information Technology, Germany},
   pages = {9--22},
   type = {Conference Paper},
   month = {September},
   year = {2003},
   keywords = {trust; transitive; reputation; recommendation},
   language = {English},
   cr-category = {J.4 Social and Behavioral Sciences,
                   C.2.4 Distributed Systems,
                   H.3.5 Online Information Services},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-19/INPROC-2003-19.pdf,
      http://unitec.informatik.uni-stuttgart.de/},
   contact = {Michael Kinateder Kinateder@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {Transacting and interacting through computer networks makes it difficult to use
      traditional methods for establishing trust between parties. Creating
      substitutes by which people, organisations and software agents can derive trust
      in others through computer networks requires computerised analysis of trust
      topologies. This paper describes diverse dimensions of trust that are needed
      for analysing trust topologies, and provides a notation with which to express
      trust relationships in terms of these dimensions. The result is a simple way of
      specifying topologies of trust from which derived trust relationships can be
      automatically and securely computed.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-19&engl=1}
}

@inproceedings {INPROC-2003-18,
   author = {Michael Kinateder and Siani Pearson},
   title = {{A Privacy-Enhanced Peer-to-Peer Reputation System}},
   booktitle = {Proceedings of the 4th International Conference on Electronic Commerce and Web Technologies: EC-Web 2003; Prague, Czech Republic, September 2003},
   editor = {Kurt Bauknecht and A Min Tjoa and Gerald Quirchmayr},
   address = {Heidelberg},
   publisher = {Springer-Verlag},
   institution = {University of Stuttgart, Faculty of Computer Science, Electrical Engineering, and Information Technology, Germany},
   series = {Lecture Notes in Computer Science},
   volume = {2738},
   pages = {206--215},
   type = {Conference Paper},
   month = {September},
   year = {2003},
   isbn = {3-540-40808-8},
   keywords = {trust; reputation; recommendation; trusted platforms; trusted computing platform alliance; TCPA; trusted computing group; TCG; privacy; security},
   language = {English},
   cr-category = {B.8 Performance and Reliability,
                   D.4.6 Operating Systems Security and Protection,
                   H.3.4 Information Storage and Retrieval Systems and Software,
                   H.3.5 Online Information Services,
                   H.4.2 Information Systems Applications Types of Systems,
                   K.4.1 Computers and Society Public Policy Issues,
                   K.4.4 Electronic Commerce,
                   K.6.5 Security and Protection},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-18/INPROC-2003-18.pdf,
      http://unitec.informatik.uni-stuttgart.de/},
   contact = {Michael Kinateder kinateder@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {In this paper, a method is described for providing a distributed reputation
      system with enhanced privacy and security as a design feature. This is achieved
      using a network of trusted agents on each client platform that exploit Trusted
      Computing Platform Alliance (TCPA) technology.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-18&engl=1}
}

@inproceedings {INPROC-2003-17,
   author = {Kurt Rothermel and Dieter Fritsch and Bernhard Mitschang and Paul J. K{\"u}hn and Martin Bauer and Christian Becker and Christian Hauser and Daniela Nicklas and Steffen Volz},
   title = {{SFB 627: Umgebungsmodelle f{\"u}r mobile kontextbezogene Systeme}},
   booktitle = {Proceedings Informatik 2003},
   address = {Frankfurt},
   publisher = {Gesellschaft f{\"u}r Informatik},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   type = {Conference Paper},
   month = {September},
   year = {2003},
   keywords = {Umgebungsmodelle; kontext-bezogene Systeme; Nexus; Spatial World Models; context-aware systems},
   language = {German},
   cr-category = {C.2.4 Distributed Systems,
                   H.2.4 Database Management Systems,
                   H.2.8 Database Applications,
                   H.3.4 Information Storage and Retrieval Systems and Software},
   ee = {http://www.nexus.uni-stuttgart.de},
   contact = {Kurt.Rothermel@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems;
                  University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems;
                  Universit{\"a}t Stuttgart, Institut f{\"u}r Kommunikationsnetze und Rechnersysteme (IKR);
                  Universit{\"a}t Stuttgart, Institut f{\"u}r Photogrammetrie (ifp)},
   abstract = {Ziel des Sonderforschungsbereichs 627 ``Umgebungsmodelle f{\"u}r mobile
      kontextbezogene Systeme'' ist die Erforschung von Methoden und Verfahren f{\"u}r die
      Definition, die Verwaltung und die Nutzung von digitalen Umgebungsmodellen.
      Existierende Informationsr{\"a}ume werden mit komplexen Modellen der realen Welt
      verschr{\"a}nkt und erlauben so neuartige Anwendungen. Insbesondere die Klasse der
      ortsbezogenen Anwendungen und aktuelle Forschungsgebiete wie das Ubiquitous
      Computing k{\"o}nnen von solchen Umgebungsmodellen profitieren, oder werden durch
      sie erst erm{\"o}glicht.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-17&engl=1}
}

@inproceedings {INPROC-2003-13,
   author = {Christian Becker and Gregor Schiele and Holger Gubbels and Kurt Rothermel},
   title = {{BASE - A Micro-broker-based Middleware For Pervasive Computing}},
   booktitle = {Proceedings of the First IEEE International Conference on Pervasive Computing and Communication (PerCom), March 23-26, Fort Worth, USA},
   address = {Los Alamitos},
   publisher = {IEEE Computer Society},
   institution = {University of Stuttgart, Faculty of Computer Science, Electrical Engineering, and Information Technology, Germany},
   pages = {443--451},
   type = {Conference Paper},
   month = {March},
   year = {2003},
   isbn = {0-7695-1895},
   keywords = {Middleware, Ubiquitous Computing, Microbroker, Micro-broker, BASE},
   language = {English},
   cr-category = {C.2.4 Distributed Systems},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-13/INPROC-2003-13.pdf},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {Pervasive computing environments add a multitude of additional devices to our
      current computing landscapes. Specialized embedded systems provide sensor
      information about the real world or offer a distinct functionality, e.g.
      presentation on a “smart wall”. Spontaneous networking leads to constantly
      changing availability of services. This requires middleware support to ease
      application development. Additionally, we argue that an extensible middleware
      platform covering small embedded systems to full-fledged desktop computers is
      needed. Such a middleware should provide easy-to-use abstractions to access
      remote services and device-specific capabilities. We present a micro-broker-
      based approach which meets these requirements by allowing uniform access to
      device capabilities and services through proxies and the integration of
      different interoperability protocols. A minimum configuration of the middleware
      can be executed on embedded systems. Resource-rich execution environments are
      supported by the extensibility of the middleware.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-13&engl=1}
}

@inproceedings {INPROC-2003-12,
   author = {Daniel Herrscher and Steffen Maier and Kurt Rothermel},
   title = {{Distributed Emulation of Shared Media Networks}},
   booktitle = {Proceedings of the 2003 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS 2003), Montr{\'e}al, Quebec, Canada, July 20-24, 2003},
   publisher = {SCS},
   institution = {University of Stuttgart, Faculty of Computer Science, Electrical Engineering, and Information Technology, Germany},
   pages = {226--233},
   type = {Conference Paper},
   month = {July},
   year = {2003},
   isbn = {1-56555-269-5},
   keywords = {network emulation; distributed emulation; performance analysis; shared media; CSMA/CD},
   language = {English},
   cr-category = {C.2.5 Local and Wide-Area Networks,
                   D.4.4 Operating Systems Communications Management,
                   I.6.3 Simulation and Modeling Applications},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-12/INPROC-2003-12.pdf,
      ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-12/INPROC-2003-12.ps,
      http://net.informatik.uni-stuttgart.de/},
   contact = {herrscher@informatik.uni-stuttgart.de, maier@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed 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. While there are several centralized and distributed emulation
      tools available that can mimic the behavior of point-to-point links, shared
      media communication can only be emulated by totally centralized tools so far.
      To permit the emulation of large-scale mixed network scenarios, the emulation
      of shared media networks has to be performed in a distributed way also.
      
      In this paper, we introduce several strategies to emulate shared media networks
      in a distributed fashion. For one promising approach, the distributed emulation
      of carrier sensing, we present a prototype implementation. Measurements show
      the applicability and limitations of our solution.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-12&engl=1}
}

@inproceedings {INPROC-2003-11,
   author = {Christian Becker and Gregor Schiele},
   title = {{Middleware and Application Adaptation Requirements and their Support in Pervasive Computing}},
   booktitle = {Proceedings of the 23rd International Conference on Distributed Computing Systems Workshops (ICDCS 2003), 3rd International Workshop on Distributed Auto-adaptive and Reconfigurable Systems (DARES), Providence, USA, May 19-22},
   address = {Los Alamitos},
   publisher = {IEEE Computer Society},
   institution = {University of Stuttgart, Faculty of Computer Science, Electrical Engineering, and Information Technology, Germany},
   pages = {98--103},
   type = {Conference Paper},
   month = {May},
   year = {2003},
   isbn = {0-7695-1921-0},
   language = {English},
   cr-category = {C.2.4 Distributed Systems},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-11/INPROC-2003-11.pdf},
   contact = {Email an christian.becker@informatik.uni-stuttgart.de oder gregor.schiele@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {Pervasive computing environments are characterized by an additional
      heterogeneity compared to existing computing infrastructures. Devices ranging
      from small embedded systems to full-fledged computers are connected via
      spontaneously formed networks. In this paper we analyze requirements of
      applications and system software to cope with the dynamically changing
      execution environment. Based on our micro-broker-based middleware BASE a
      component framework for pervasive computing supporting application adaptation
      is proposed.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-11&engl=1}
}

@inproceedings {INPROC-2003-10,
   author = {Michael Kinateder and Kurt Rothermel},
   title = {{Architecture and Algorithms for a Distributed Reputation System}},
   booktitle = {Proceedings of the First International Conference on Trust Management: iTrust'03; Heraklion, Crete, Greece, May 28-30, 2003},
   editor = {Paddy Nixon and Sotirios Terzis},
   address = {Heidelberg},
   publisher = {Springer-Verlag},
   institution = {University of Stuttgart, Faculty of Computer Science, Electrical Engineering, and Information Technology, Germany},
   series = {Lecture Notes in Computer Science},
   volume = {2692},
   pages = {1--16},
   type = {Conference Paper},
   month = {May},
   year = {2003},
   isbn = {3-540-40224-1},
   keywords = {trust; trust management; reputation; recommendation; distributed; peer-to-peer},
   language = {English},
   cr-category = {C.2.4 Distributed Systems,
                   H.3.3 Information Search and Retrieval,
                   H.3.4 Information Storage and Retrieval Systems and Software,
                   H.3.5 Online Information Services,
                   H.4.2 Information Systems Applications Types of Systems,
                   I.2.4 Knowledge Representation Formalisms and Methods,
                   I.2.11 Distributed Artificial Intelligence,
                   J.4 Social and Behavioral Sciences},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-10/INPROC-2003-10.pdf,
      http://www.springerlink.com/link.asp?id=1e11b5pcvww3qvuf,
      http://unitec.informatik.uni-stuttgart.de},
   contact = {Michael Kinateder kinateder@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {Trust is an essential component of successful interactions in social life as
      well as in business relationships. In this paper we propose a system that
      closely reflects real-world trust building in an online environment. We
      describe the models used to represent trust in entities in various categories,
      algorithms to calculate and update trust based on experiences of entities with
      each other and the agent interactions necessary for finding and exchanging
      trust information.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-10&engl=1}
}

@inproceedings {INPROC-2003-09,
   author = {Martin Bauer and Christian Becker and J{\"o}rg H{\"a}hner and Gregor Schiele},
   title = {{ContextCube - Providing Context Information Ubiquitously}},
   booktitle = {Proceedings of the 23rd International Conference on Distributed Computing Systems Workshops (ICDCS 2003)},
   address = {Los Alamitos},
   publisher = {IEEE Computer Society},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   pages = {308--313},
   type = {Conference Paper},
   month = {May},
   year = {2003},
   isbn = {0-7695-1921-0},
   language = {English},
   cr-category = {H.3.4 Information Storage and Retrieval Systems and Software},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-09/INPROC-2003-09.pdf,
      http://www.nexus.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {Sensing the state of the environment is an important source for context-aware
      applications. Several approaches exist to provide sensor information to mobile
      application nodes. As the extreme cases we have pure infrastructures and pure
      ad hoc networks. In order to allow sensor platforms to serve both of these
      approaches, we have designed a universal sensor platform and integrated it into
      an infrastructure-based approach as well as into ad hoc networks. In this paper
      we discuss the requirements on such a platform, the design, and the
      experiences.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-09&engl=1}
}

@inproceedings {INPROC-2003-08,
   author = {Jing Tian and Luca Coletti},
   title = {{Routing approach in CarTALK 2000 project}},
   booktitle = {Proceedings of the IST Mobile \& Wireless Communications Summit 2003. Vol. 2},
   address = {Aveiro - Portugal},
   publisher = {Instituto de Telecomunica{\,c}{\~o}es (IT)},
   institution = {University of Stuttgart, Faculty of Computer Science, Electrical Engineering, and Information Technology, Germany},
   pages = {473--477},
   type = {Conference Paper},
   month = {June},
   year = {2003},
   keywords = {mobile ad hoc routing},
   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-2003-08/INPROC-2003-08.pdf},
   contact = {jing.tian@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {The CarTALK 2000 project aims at the development of new driver assistance
      systems that are based upon inter-vehicle communication. To this purpose, a
      mobile ad hoc network (MANET) consisting of vehicles will be developed as the
      communication platform to support co-operative driver assistance applications.
      Routing in such a vehicular MANET faces a number of new challenges, in
      particular due to the extremely dynamic network topology and a large variable
      number of mobile nodes. Therefore, an efficient and scalable ad hoc routing
      mechanism is crucial for the performance of the CarTALK 2000 communication
      system. After analyzing the system characteristics and requirements, this paper
      introduces a spatially aware routing protocol and a distributed location
      service. The key of Spatially Aware Routing is to improve position-based
      routing performance by integrating spatial environment information into
      routing, such as the underlying road topology.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-08&engl=1}
}

@inproceedings {INPROC-2003-07,
   author = {Kurt Rothermel and Martin Bauer and Christian Becker},
   title = {{Digitale Weltmodelle - Grundlage kontextbezogener Systeme}},
   booktitle = {Total vernetzt - Szenarien einer informatisierten Welt},
   editor = {Friedemann Mattern},
   address = {Berlin, Heiderlberg, New York},
   publisher = {Springer-Verlag},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   series = {Xpert.press},
   pages = {123--141},
   type = {Conference Paper},
   month = {May},
   year = {2003},
   isbn = {3-540-0023-8},
   keywords = {Kontext; kontextbezogene Systeme; Ubiquitous Computing; Nexus},
   language = {German},
   cr-category = {H.3.4 Information Storage and Retrieval Systems and Software},
   ee = {http://www.nexus.uni-stuttgart.de},
   contact = {E-Mail: Kurt.Rothermel@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {Die rasant fortschreitende Entwicklung von Sensorsystemen und drahtloser
      Kommunikation f{\"u}hrt zu multifunktionalen mobilen Endger{\"a}ten, die in der Lage
      sind, Kontextinformation zu erfassen, zu verarbeiten und zu kommunizieren.
      Durch die extreme Miniaturisierung eingebetteter Systeme entstehen au{\ss}erdem
      ``intelligente'' Alltagsgegenst{\"a}nde, die in Netzwerke eingebunden sind und {\"u}ber
      sensorische F{\"a}higkeiten verf{\"u}gen. Vor dem Hintergrund dieser Entwicklungen ist
      es absehbar, dass in wenigen Jahren Milliarden von Sensoren existieren werden,
      die kontinuierlich den Zustand der Realwelt erfassen und kommunizieren. F{\"u}hrt
      man die sensorisch gewonnen Informationen in einem r{\"a}umlichen Modell zusammen,
      so entsteht ein digitales Abbild der Realwelt, also ein digitales Weltmodell,
      das analog zum heutigen Web einen globalen Informationsraum darstellt. Das
      digitale Weltmodell kann Grundlage sein f{\"u}r ein breites Spektrum
      kontextbezogener Anwendungen, deren Kontext prinzipiell keinen r{\"a}umlichen
      Beschr{\"a}nkungen unterworfen ist.
      
      In diesem Beitrag wird der Begriff der kontextbezogene Anwendungen erl{\"a}utert
      und Anwendungen dieser Art am Beispiel existierender Systeme beschrieben und
      klassifiziert. Au{\ss}erdem wird die Vision, Kontextinformationen in Form digitaler
      Weltmodelle zu verwalten, dargelegt und motiviert. Schlie{\ss}lich werden die sich
      aus dieser Vision ergebenden wissenschaftlichen Fragestellungen diskutiert.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-07&engl=1}
}

@inproceedings {INPROC-2003-06,
   author = {J{\"o}rg H{\"a}hner and Christian Becker and Kurt Rothermel},
   title = {{A Protocol for Data Dissemination in Frequently Partitioned Mobile Ad Hoc Networks}},
   booktitle = {Proceedings of the Eighth IEEE Symposium on Computers and Communications (ISCC 2003). Vol. I},
   editor = {Ahmed Tantawy and Kemal Inan},
   address = {Los Alamitos},
   publisher = {IEEE Computer Society},
   institution = {University of Stuttgart, Faculty of Computer Science, Electrical Engineering, and Information Technology, Germany},
   pages = {633--640},
   type = {Conference Paper},
   month = {June},
   year = {2003},
   isbn = {0-7695-1961-X},
   language = {English},
   cr-category = {C.2.1 Network Architecture and Design},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-06/INPROC-2003-06.pdf},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {Distribution of data in mobile ad hoc networks is challenged when the mobility
      of nodes leads to frequent topology changes. Existing approaches so far address
      either the network partitioning problem or are capable of handling large
      amounts of data, but not both at the same time. In this paper a novel approach
      is presented which is based on a negotiation scheme enhanced by an adaptive
      repetition strategy. Different strategies for the selection of repeated data
      are presented and evaluated. Simulation results show a reduction of data
      transfer volume compared to hyper-flooding by 30 to 40\% even in the presence of
      frequent network partitions.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-06&engl=1}
}

@inproceedings {INPROC-2003-05,
   author = {Cora Burger and Matthias Papesch},
   title = {{Eine interaktive und kollaborative Selbstlernumgebung f{\"u}r den Bereich der Sicherheitsprotokolle}},
   booktitle = {Tagungsband der 1. e-Learning Fachtagung Informatik der Gesellschaft f{\"u}r Informatik e.V., DeLFI 2003},
   editor = {Sabine Rathmayer Arndt Bode},
   publisher = {GI Edition „Lecture Notes in Informatics“},
   institution = {University of Stuttgart, Faculty of Computer Science, Electrical Engineering, and Information Technology, Germany},
   type = {Conference Paper},
   month = {September},
   year = {2003},
   keywords = {E-Learning; Security Protocols; Validation},
   language = {German},
   cr-category = {D.2.4 Software Engineering Software/Program Verification,
                   I.6.7 Simulation Support Systems,
                   K.3.1 Computer Uses in Education},
   ee = {http://www.informatik.uni-stuttgart.de/ipvr/vs/de/projects/index.html#ito,
      http://www.delfi2003.de},
   contact = {caburger@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {Im Bereich Verteilter Systeme und Rechnernetze spielen Sicherheitsprotokolle
      zum Schutz von Identit{\"a}t und anderweitigen Ressourcen einzelner Personen eine
      wichtige Rolle. Um die Verst{\"a}ndlichkeit dieser komplexen Materie in der Lehre
      zu erh{\"o}hen und f{\"u}r dieses Gebiet ein von Ort und Zeit unabh{\"a}ngiges Lernen zu
      erm{\"o}glichen, entstand eine speziell darauf ausgelegte Selbstlernumgebung. Sie
      verbindet vielf{\"a}ltige Funktionen f{\"u}r ein exploratives Vorgehen sowie
      automatisiert auswertbare Selbsttests zur Lernkontrolle mit der M{\"o}glichkeit der
      gemeinsamen Erarbeitung von Inhalten im Lernteam.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-05&engl=1}
}

@article {ART-2003-04,
   author = {Kurt Rothermel and Martin Bauer and Christian Becker},
   title = {{SFB 627 - ``Nexus'' Umgebungsmodelle f{\"u}r mobile kontextbezogene Systeme}},
   journal = {it - Information Technology},
   editor = {Paul Molitor and Klaus K{\"u}spert and Kurt Rothermel},
   address = {M{\"u}nchen},
   publisher = {Oldenbourg Wissenschaftsverlag GmbH},
   volume = {45},
   number = {5},
   pages = {293--300},
   type = {Article in Journal},
   month = {October},
   year = {2003},
   keywords = {ubiquitous computing; spatial world models; Umgebungsmodelle; context-awareness; kontext-bezogene Systeme; Nexus},
   language = {German},
   cr-category = {C.2.4 Distributed Systems,
                   H.2.4 Database Management Systems,
                   H.2.8 Database Applications,
                   H.3.4 Information Storage and Retrieval Systems and Software},
   ee = {http://www.nexus.uni-stuttgart.de},
   contact = {kurt.rothermel@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {Die Entwicklungen im Bereich der Sensortechnologie erlauben eine zunehmende
      Miniaturisierung von Sensorplattformen. Diese k{\"o}nnen in Alltagsgegenst{\"a}nde
      integriert werden und Umgebungsinformationen durch drahtlose Kommunikation
      bereitstellen. F{\"u}hrt man die erfassten Sensordaten zusammen und ordnet diese
      Informationen Orten in r{\"a}umlichen Modellen zu, entstehen Umgebungsmodelle. Die
      Erforschung von Methoden und Verfahren f{\"u}r die Erstellung, das Management und
      die Nutzung der F{\"o}deration solcher Umgebungsmodelle ist Ziel des
      Sonderforschungsbereichs 627 an der Universit{\"a}t Stuttgart.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2003-04&engl=1}
}