@inproceedings {INPROC-2004-44,
   author = {Carmen Constantinescu and Sergey Kornienko and Olga Kornienko and Uwe Heinkel},
   title = {{An agent-based approach to support the scalability of change propagation}},
   booktitle = {Proceedings of the ISCA 17th International Conference on PARALLEL AND DISTRIBUTED COMPUTING SYSTEMS},
   editor = {D.A. Bader and A. A. Khokhar},
   publisher = {ISCA},
   institution = {University of Stuttgart, Faculty of Computer Science, Electrical Engineering, and Information Technology, Germany},
   pages = {157--164},
   type = {Conference Paper},
   month = {September},
   year = {2004},
   isbn = {1-880843-52-8},
   language = {German},
   cr-category = {I.2.11 Distributed Artificial Intelligence,
                   H.3.4 Information Storage and Retrieval Systems and Software},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems;
                  University of Stuttgart, Institute of Parallel and Distributed Systems, Image Understanding},
   abstract = {In this paper, we address aspects of the challenge facing the Data Integration
      solutions in the problem of increasing the scalability. We first overview our
      results in data integration and present our prototype. Searching for a
      motivation to employ the agent-based technology and envision how this
      technology can be applied to improve the system scalability represent the next
      step of our research. For that, we examine some formal definitions and metrics
      of scalability which fit the purpose of system description. The analysis of our
      data integration solution, a change propagation system called Champagne,
      identifies the system components having the most influence on the scalability
      problem. We propose to employ the agent-based technology to improve the
      scalability and perform some experiments which reveal our work.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-44&engl=1}
}

@inproceedings {INPROC-2004-42,
   author = {Thomas Schwarz and Markus Iofcea and Matthias Grossmann and Nicola H{\"o}nle and Daniela Nicklas and Bernhard Mitschang},
   title = {{On Efficiently Processing Nearest Neighbor Queries in a Loosely Coupled Set of Data Sources}},
   booktitle = {Proceedings of the 12th ACM International Symposium on Advances in Geographic Information System (ACM GIS 004), Washington D.C., November 12-13, 2004},
   editor = {ACM},
   publisher = {?},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   type = {Conference Paper},
   month = {November},
   year = {2004},
   keywords = {Data integration, distributed query processing, federated database system, kNN, nearest neighbors, parallel query processing},
   language = {English},
   cr-category = {H.2.4 Database Management Systems,
                   H.2.8 Database Applications,
                   H.3.3 Information Search and Retrieval},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2004-42/INPROC-2004-42.pdf},
   contact = {thomas.schwarz@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems},
   abstract = {We propose a family of algorithms for processing nearest neighbor (NN) queries
      in an integration middleware that provides federated access to numerous loosely
      coupled, autonomous data sources connected through the internet. Previous
      approaches for parallel and distributed NN queries considered all data sources
      as relevant, or determined the relevant ones in a single step by exploiting
      additional knowledge on object counts per data source. We propose a different
      approach that does not require such detailed statistics about the distribution
      of the data. It iteratively enlarges and shrinks the set of relevant data
      sources. Our experiments show that this yields considerable performance
      benefits with regard to both response time and effort. Additionally, we propose
      to use only moderate parallelism instead of querying all relevant data sources
      at the same time. This allows us to trade a slightly increased response time
      for a lot less effort, hence maximizing the cost profit ratio, as we show in
      our experiments. Thus, the proposed algorithms clearly extend the set of NN
      algorithms known so far.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-42&engl=1}
}

@inproceedings {INPROC-2004-41,
   author = {Daniela Nicklas and Nicola H{\"o}nle and Michael Moltenbrey and Bernhard Mitschang},
   title = {{Design and Implementation Issues for Explorative Location-based Applications: the NexusRallye}},
   booktitle = {Proceedings for the VI Brazilian Symposium on GeoInformatics: GeoInfo 2004; November 22-24, 2004},
   editor = {Gilberto Camara Cirano Iochpe},
   address = {Sao Jose dos Campos},
   publisher = {INPE},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   pages = {167--181},
   type = {Conference Paper},
   month = {November},
   year = {2004},
   isbn = {3-901882-20-0},
   keywords = {location-based services, context-awareness, mobile applications},
   language = {German},
   cr-category = {H.2.8 Database Applications,
                   H.5.3 Group and Organization Interfaces},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2004-41/INPROC-2004-41.pdf,
      http://www.nexus.uni-stuttgart.de},
   contact = {danickla@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems},
   abstract = {Explorative Location-based Applications (eLBA) define a new class of
      applications that rely on both positioning (i.e. location information) and
      georeferenced information in addition to a flexible and efficient system
      infrastructure that supports a mobile and ubiquitous usage. In this paper we
      define first a modeling framework to design eLBAs that builds on the concept of
      tasks as a very valuable system/user interaction and application structuring
      concept. In addition, we report on a system framework, the Nexus platform, that
      efficiently provides access to georeferenced information and positioning
      information. Our sample application, the NexusRallye, is used to exemplify
      important aspects of our solution platform and to show its advantages as
      compared to other approaches.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-41&engl=1}
}

@inproceedings {INPROC-2004-40,
   author = {Thomas Schwarz and Nicola H{\"o}nle and Matthias Grossmann and Daniela Nicklas and Bernhard Mitschang},
   title = {{Efficient Domain-Specific Information Integration in Nexus}},
   booktitle = {Proceedings of the 2004 VLDB Workshop on Information Integration on the Web : IIWeb-2004 ; Toronto, Canada, August 30, 2004},
   editor = {Hasan Davulcu and Nick Kushmerick},
   publisher = {online},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   pages = {122--127},
   type = {Conference Paper},
   month = {August},
   year = {2004},
   keywords = {Nexus; information integration; domain-specific},
   language = {English},
   cr-category = {H.3.4 Information Storage and Retrieval Systems and Software,
                   H.3.3 Information Search and Retrieval},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2004-40/INPROC-2004-40.pdf,
      http://cips.eas.asu.edu/iiwebfinalproceedings/52.pdf,
      http://cips.eas.asu.edu/iiweb-proceedings.html},
   contact = {thomas.schwarz@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems},
   abstract = {In this paper, we present the Nexus approach to efficient domain-specific
      integration of many loosely coupled data sources. A so called information
      maximizing mediation middleware (IMMM) has to cope with large data volumes and
      many queries, and at the same time achieve a tight semantic integration for the
      data instances. For efficiency and practicability reasons, we propose to use an
      extensible global schema and a limited domain-specific query language. This
      facilitates employing domain-specific semantic knowledge in the middleware:
      detect duplicates, merge multiple representations, aggregate and generalize
      information. Finally, we present a working prototype tailored to the domain of
      context-aware applications.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-40&engl=1}
}

@inproceedings {INPROC-2004-38,
   author = {Christian Becker and Daniela Nicklas},
   title = {{Where do spatial context-models end and where do ontologies start? A proposal of a combined approach}},
   booktitle = {Proceedings of the First International Workshop on Advanced Context Modelling, Reasoning and Management in conjunction with UbiComp 2004},
   editor = {Jadwiga Indulska and David De Roure},
   address = {Nottingham, England},
   publisher = {University of Southhampton},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   pages = {48--53},
   type = {Conference Paper},
   month = {September},
   year = {2004},
   isbn = {854328130},
   keywords = {Context-Models, Adaptation, Infrastructures for Context-Aware Computing, Ubiquitous Computing},
   language = {German},
   cr-category = {H.2.1 Database Management Logical Design},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2004-38/INPROC-2004-38.pdf},
   contact = {christian.becker@informatik.uni-stuttgart.de, daniela.nicklas@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},
   abstract = {Context-aware applications adapt their behavior depending on the state of the
      physical world along with other information representing context. This requires
      context management, i.e., the efficient management of context information and
      feasible context representations in order to allow reasoning. This paper
      discusses two common approaches, spatial context models and contextual
      ontologies, and argues for a combined approach providing the efficiency of
      context management through context models combined with the semantic
      expressiveness of ontologies.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-38&engl=1}
}

@inproceedings {INPROC-2004-30,
   author = {Tobias Kraft and Holger Schwarz},
   title = {{CHICAGO: A Test and Evaluation Environment for Coarse-Grained Optimization}},
   booktitle = {Proceedings of the 30th International Conference on Very Large Databases, Toronto, Canada, August 29th - September 3rd, 2004},
   publisher = {Morgan Kaufmann},
   institution = {University of Stuttgart, Faculty of Computer Science, Electrical Engineering, and Information Technology, Germany},
   pages = {1345--1348},
   type = {Conference Paper},
   month = {August},
   year = {2004},
   isbn = {0-12-088469-0},
   language = {German},
   cr-category = {H.2.4 Database Management Systems},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems},
   abstract = {Relational OLAP tools and other database applications generate sequences of SQL
      statements that are sent to the database server as result of a single
      information request issued by a user. Coarse-Grained Optimization is a
      practical approach for the optimization of such statement sequences based on
      rewrite rules. In this demonstration we present the CHICAGO test and evaluation
      environment that allows to assess the effectiveness of rewrite rules and
      control strategies. It includes a lightweight heuristic optimizer that modifies
      a given statement sequence using a small and variable set of rewrite rules.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-30&engl=1}
}

@inproceedings {INPROC-2004-29,
   author = {Frank D{\"u}rr and Nicola H{\"o}nle and Daniela Nicklas and Christian Becker and Kurt Rothermel},
   title = {{Nexus--A Platform for Context-Aware Applications}},
   booktitle = {1. GI/ITG Fachgespr{\"a}ch Ortsbezogene Anwendungen und Dienste.},
   editor = {J{\"o}rg Roth},
   address = {Hagen},
   publisher = {FernUniversit{\"a}t in Hagen},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   series = {Informatik-Berichte der FernUniversit{\"a}t in Hagen},
   volume = {317},
   pages = {15--18},
   type = {Conference Paper},
   month = {June},
   year = {2004},
   keywords = {Location-based Service; Context-aware System; Platform; Geocast},
   language = {English},
   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,
                   C.2.2 Network Protocols},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2004-29/INPROC-2004-29.pdf},
   contact = {Senden Sie eine E-Mail an frank.duerr@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},
   abstract = {In this paper we present the Nexus Platform for context-aware applications.
      This platform allows to share the effort of setting up a global and detailed
      context model between different providers by federating their partial models.
      Applications can query data directly, use push-based communication through an
      event service, or use value-added services like a navigation or map service for
      special tasks. Additional context-aware services like hoarding or geocast can
      be implemented on basis of the platform. For the latter we present different
      approaches for addressing and efficient message forwarding based on the Nexus
      Platform.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-29&engl=1}
}

@inproceedings {INPROC-2004-24,
   author = {Tobias Drosdol and Thomas Schwarz and Martin Bauer and Matthias Gro{\ss}mann and Nicola H{\"o}nle and Daniela Nicklas},
   title = {{Keeping Track of ``Flying Elephants'': Challenges in Large-Scale Management of Complex Mobile Objects}},
   booktitle = {Proceedings of INFORMATIK 2004 - the Thirty-Fourth Annual Conference of the Gesellschaft f{\"u}r Informatik e.V.(GI); Ulm, Germany, September 20-24, 2004. Vol. 1},
   editor = {Peter Dadam and Manfred Reichert},
   address = {Bonn},
   publisher = {K{\"o}llen Druck+Verlag GmbH},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   series = {Lecture Notes in Informatics},
   volume = {P-50},
   pages = {288--292},
   type = {Conference Paper},
   month = {September},
   year = {2004},
   isbn = {3-88579-379-2},
   language = {English},
   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},
   contact = {Tobias Drosdol Tobias.Drosdol@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems;
                  University of Stuttgart, Institute of Parallel and Distributed Systems, Distributed Systems},
   abstract = {The management of mobile objects like cars, persons, or workpieces in a factory
      is an important task in many context-aware environments. So far, most solutions
      can either cope with many small objects (few properties) or with a limited
      number of complex objects in a centralized way. In this paper, we face the
      challenge of managing a large number of bulky mobile objects (flying
      elephants). We state requirements, propose basic components, and discuss
      alternative architectures based on the main influencing factors like mobility
      and update rate.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-24&engl=1}
}

@inproceedings {INPROC-2004-19,
   author = {Thomas Schwarz and Nicola H{\"o}nle and Matthias Gro{\ss}mann and Daniela Nicklas},
   title = {{A Library for Managing Spatial Context Using Arbitrary Coordinate Systems}},
   booktitle = {Workshop on Context Modeling and Reasoning : CoMoRea'04 ; In: Workshops-Proceedings of the 2nd IEEE Conference on Pervasice Computing and Communications : PerCom2004 ; Orlando, Florida, March 14-17, 2004},
   publisher = {IEEE Computer Society},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   pages = {48--52},
   type = {Conference Paper},
   month = {March},
   year = {2004},
   keywords = {coordinate transformation, basic geometry types, spatial reference system, data integration, library for context-aware applications},
   language = {English},
   cr-category = {I.3.5 Computational Geometry and Object Modeling,
                   H.2.8 Database Applications,
                   J.2 Physical Sciences and Engineering},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2004-19/INPROC-2004-19.pdf,
      http://nexus.informatik.uni-stuttgart.de/COMOREA/,
      http://www.percom.org/percom_2004/index.htm,
      http://www.nexus.uni-stuttgart.de/},
   contact = {thomas.schwarz@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems},
   abstract = {Since location is an important part of context, the management of spatial
      information is important for many context-aware applications, e.g. the position
      or the extent of users, sensors, rooms or buildings. Coordinates always have a
      coordinate system (CS) associated to them. Numerous CSs exist and a lot of them
      are commonly used, thus conversion becomes a necessity. We introduce a library
      that implements the OGC Simple Feature Specification and can dynamically cope
      with different CSs, enabling interoperability between applications, middleware
      components and data providers. We illustrate functions and features, describe a
      common CS determination algorithm and point out our lessons learned: avoid
      transformations, use existing standards but dare to extend them when needed.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-19&engl=1}
}

@inproceedings {INPROC-2004-02,
   author = {Othmar Lehmann and Martin Bauer and Christian Becker and Daniela Nicklas},
   title = {{From Home to World - Supporting Context-aware Applications through World Models}},
   booktitle = {Proceedings of the Second IEEE International Conference on Pervasive Computing and Communications},
   publisher = {IEEE Computer Society},
   institution = {University of Stuttgart : Collaborative Research Center SFB 627 (Nexus: World Models for Mobile Context-Based Systems), Germany},
   pages = {297--306},
   type = {Conference Paper},
   month = {March},
   year = {2004},
   keywords = {context; context-awareness; pervasive computing; ubiquitous computing; world model; Nexus},
   language = {English},
   cr-category = {C.2.4 Distributed Systems,
                   H.2.1 Database Management Logical Design,
                   H.3.4 Information Storage and Retrieval Systems and Software},
   ee = {http://www.percom.org/,
      http://www.nexus.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},
   abstract = {In the vision of pervasive computing smart everyday objects communicate and
      cooperate to provide services and information to users. Interoperability
      between devices and applications not only requires common protocols but also
      common context management. In this paper we discuss requirements on the context
      management based on the Georgia Tech's Aware Home environment and the global
      context management perspective of the Nexus project. Our experiences with
      integrating the Aware Home Spatial Service into the Nexus platform show how
      federation concepts and a common context model can provide applications with
      uniform context information in different administrative and application
      domains.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-02&engl=1}
}

@article {ART-2004-20,
   author = {Bernhard Mitschang and Stefan Jablonski},
   title = {{Middleware-Technologien zur Systemintegration}},
   journal = {Middleware-Technologien zur Systemintegration},
   editor = {Oldenbourg},
   publisher = {Oldenbourg Wissenschaftsverlag},
   volume = {46},
   number = {4},
   pages = {173--174},
   type = {Article in Journal},
   month = {April},
   year = {2004},
   issn = {1611-2776},
   language = {English},
   cr-category = {H.2.2 Database Management Physical Design},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems},
   abstract = {Middleware-Technologien zur Systemintegration},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2004-20&engl=1}
}

@article {ART-2004-14,
   author = {Bernhard Mitschang and Engelbert Westk{\"a}mper and Carmen Constantinescu and Uwe Heinkel and Benno L{\"o}ffler and Ralf Rantzau and Raplh Winkler},
   title = {{Divide et Impera: A Flexible Integration of Layout Planning and Logistics Simulation through Data Change Propagation.}},
   journal = {The CIRP - Journal of Manufacturing Systems},
   editor = {J. Peklenik},
   publisher = {CIRP},
   volume = {33},
   number = {6},
   pages = {509--518},
   type = {Article in Journal},
   month = {November},
   year = {2004},
   language = {English},
   cr-category = {J.6 Computer-Aided Engineering,
                   C.2.4 Distributed Systems},
   contact = {Uwe.Heinkel@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems},
   abstract = {The turbulent markets lead to new challenges for today’s enterprises, they have
      to be transformable to stay competitive. Therefore, we developed a new approach
      that integrates Logistic Simulation and Layout Planning to fulfil the goal of
      improving the production system. Our approach is based on propagation and
      transformation of data changes concerning the continuous adaptation tasks among
      the Layout Planning and Logistics Simulation systems. Instead of relying on a
      tightly integrated global data schema, we connect systems only as far as
      required by building “bridges” between them. The systems that participate in
      the integration are kept autonomous. We use several state-of-the-art XML
      technologies in our integration system.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2004-14&engl=1}
}

@article {ART-2004-07,
   author = {Stefan Berger and Christoph Mangold and Sebastian Meyer},
   title = {{Wissensmanagement f{\"u}r die wandlungsf{\"a}hige Montage}},
   journal = {wt Werkstattstechnik},
   publisher = {Springer VDI Verlag},
   volume = {94},
   pages = {80--85},
   type = {Article in Journal},
   month = {March},
   year = {2004},
   language = {German},
   cr-category = {H.3.3 Information Search and Retrieval},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems},
   abstract = {Turbulente Aufgabenumfelder verlangen von Unternehmen schnelle Antworten und
      Adaptionen. Wandlungsf{\"a}higkeit und Responsef{\"a}higkeit als entscheidende
      Erfolgsfaktoren basieren auf Wissen, das kontinuierlich zu verbessern und
      aufgabenspezifisch zu erneuern ist. Gezeigt wird, wie sich mit Hilfe von
      Wissensmanagement gezielt die Wandlungsf{\"a}higkeit in und von Unternehmen –
      speziell in der Montage – erh{\"o}hen l{\"a}sst.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2004-07&engl=1}
}

@article {ART-2004-06,
   author = {Clemens Dorda and Hans-Peter Steiert and J{\"u}rgen Sellentin},
   title = {{Modellbasierter Ansatz zur Anwendungsintegration}},
   journal = {it - information technology},
   publisher = {Oldenbourg},
   volume = {46},
   number = {4},
   pages = {200--210},
   type = {Article in Journal},
   month = {August},
   year = {2004},
   keywords = {EAI; MDA; Model Driven Architecture; Enterprise Application Integration; UML; Unified Modeling Language},
   language = {German},
   cr-category = {D.1.2 Automatic Programming,
                   D.2.2 Software Engineering Design Tools and Techniques,
                   D.2.12 Software Engineering Interoperability,
                   D.2.13 Software Engineering Reusable Software,
                   H.2.5 Heterogeneous Databases,
                   I.6.5 Model Development},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/ART-2004-06/ART-2004-06.pdf,
      http://www.it-inftech.de},
   contact = {Clemens.Dorda@informatik.uni-stuttgart.de, Hans-Peter.Steiert@daimlerchrysler.com, Juergen.Sellentin@daimlerchrysler.com},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems},
   abstract = {Moderne Produkte zur Anwendungsintegration in Unternehmen (EAI) bieten
      Werkzeuge, um Integrati-onsszenarien zu modellieren. Allerdings lassen sich
      damit heterogene IT-Umgebungen bisher immer nur ausschnittsweise darstellen, da
      die Modelle unter-schiedlicher EAI-Produkte nicht ausgetauscht oder integriert
      werden k{\"o}nnen. Unser Ziel ist es, die Bil-dung solcher ‚Integrationsinseln' zu
      vermeiden. Dazu pr{\"a}sentieren wir einen Ansatz, der durch technologie- und
      herstellerunabh{\"a}ngige Modellierung eine integ-rierte Sicht erlaubt. Unser
      Vorgehensmodell schl{\"a}gt vor, diese integrierte Sicht werkzeuggest{\"u}tzt auf der
      Basis von Repositories zu verfeinern, um die Reali-sierung mit konkreten
      Produkten und das Deploy-ment auf konkreten Plattformen zu automatisieren.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2004-06&engl=1}
}

@article {ART-2004-03,
   author = {Daniela Nicklas and Mitschang Bernhard},
   title = {{On building location aware applications using an open platform based on the NEXUS Augmented World Model}},
   journal = {Software and Systems Modeling},
   editor = {Bernhard Rumpe and Robert France},
   address = {Berlin Heidelberg},
   publisher = {Springer-Verlag},
   volume = {3},
   number = {4},
   type = {Article in Journal},
   month = {December},
   year = {2004},
   keywords = {Augmented World Model; Context-aware applications; Nexus; location-aware; infrastructure; open platform},
   language = {English},
   cr-category = {H.2.1 Database Management Logical Design,
                   H.2.8 Database Applications},
   contact = {Daniela Nicklas danickla@informatik.uni-stuttgart.de},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems},
   abstract = {How should the World Wide Web look like if it were for location-based
      information? And how would mobile, spatially aware applications deal with such
      a platform? In this paper we present the NEXUS Augmented World Model, an object
      oriented data model which plays a major role in an open framework for both
      providers of location-based information and new kinds of applications: the
      NEXUS platform. We illustrate the usability of the model with several sample
      applications and show the extensibility of this framework. At last we present a
      stepwise approach for building spatially aware applications in this
      environment.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2004-03&engl=1}
}

@article {ART-2004-01,
   author = {Holger Schwarz},
   title = {{Konzeptueller und logischer Data-Warehouse-Entwurf: Datenmodelle und Schematypen f{\"u}r Data Mining und OLAP}},
   journal = {Informatik Forschung und Entwicklung},
   publisher = {Springer},
   volume = {18},
   number = {2},
   pages = {53--67},
   type = {Article in Journal},
   month = {January},
   year = {2004},
   language = {German},
   cr-category = {H.2.1 Database Management Logical Design,
                   H.2.7 Database Administration,
                   H.2.8 Database Applications},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems},
   abstract = {Im Data-Warehouse-Bereich gibt es sowohl auf der konzeptuellen als auch auf der
      logischen Ebene unterschiedliche Modellierungsans{\"a}tze, deren Entwicklung sich
      in der Regel an typischen Fragestellungen aus dem Bereich des Online Analytical
      Processing (OLAP) orientierte. Daneben spielen aber auch andere Ans{\"a}tze zur
      Analyse der Daten in einem Data Warehouse eine bedeutende Rolle. Ein wichtiger
      Vertreter ist Data Mining, mit dessen Hilfe bislang unbekannte Muster und
      Zusammenh{\"a}nge in Daten identifiziert werden k{\"o}nnen. Im vorliegenden Artikel
      wird untersucht, in wieweit sich die in der Literatur vorgeschlagenen
      konzeptuellen Datenmodelle f{\"u}r ein Data Warehouse eignen, das OLAP- und
      Data-Mining-Analysen gleicherma{\ss}en unterst{\"u}tzt. Hierzu wird das COCOM-Modell,
      das auf den Modellierungsm{\"o}glichkeiten verschiedener publizierter Modelle
      aufbaut, vorgestellt und bewertet. F{\"u}r das logische Schema eines Data Warehouse
      wird h{\"a}ufig ein sogenanntes Star-Schema oder ein Snowflake-Schema erstellt. F{\"u}r
      diese und weitere Schematypen wird analysiert, welchen Einflu{\ss} die Wahl des
      logischen Schemas auf Anwendungen aus den Bereichen OLAP und Data Mining hat.
      Wichtige Kriterien sind hier unter anderem der Informationsgehalt und die
      Performanz. Insgesamt zeigt dieser Beitrag, dass das COCOM-Modell und das
      Star-Schema eine gute Grundlage f{\"u}r den integrierten Einsatz von OLAP und
      Data-Mining bilden.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2004-01&engl=1}
}

@inbook {INBOOK-2004-08,
   author = {Peter Breitling and Holger Schwarz and Mirka Zimmermann},
   title = {{Verwaltung der Lehr- und Lerninhalte in der Metadatenbank MITO}},
   series = {Information Technology Online: Online-gest{\"u}tztes Lehren und Lernen in informationstechnischen Studieng{\"a}ngen},
   address = {M{\"u}nster, New York, M{\"u}nchen, Berlin},
   publisher = {Waxmann},
   pages = {187--199},
   type = {Article in Book},
   month = {June},
   year = {2004},
   isbn = {3-8309-1358-3},
   language = {German},
   cr-category = {H.0 Information Systems General},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems},
   abstract = {Verwaltung der Lehr- und Lerninhalte in der Metadatenbank MITO},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2004-08&engl=1}
}

@book {BOOK-2004-01,
   author = {Marco Litto and Izabela Korajda and Christoph Mangold and Ronald Angerbauer and Winfried Hils and Michael Lerche},
   title = {{Baukastenbasiertes Engineering mit F{\"o}deral - Ein Leitfaden f{\"u}r Maschinen- und Anlagenbauer}},
   address = {Frankfurt a.M},
   publisher = {VDMA Verlag},
   type = {Book},
   month = {March},
   year = {2004},
   isbn = {3-8163-0478-8},
   language = {German},
   cr-category = {H.m Information Systems Miscellaneous},
   department = {University of Stuttgart, Institute of Parallel and Distributed Systems, Applications of Parallel and Distributed Systems},
   abstract = {Maschinen- und Anlagenhersteller haben das Ziel, die Standardisierung und den
      Wiederholgrad im Engineering und der Produktion zu erh{\"o}hen. Dazu ist es
      erforderlich, disziplin{\"u}bergreifend Baukastensysteme abzustimmen und zu
      entwickeln. M{\"o}glich wird dies durch ein Projektierungswerkzeug, das
      {\"u}bergeordnete Aufgaben des baukastenbasierten Engineerings zentral und
      durchg{\"a}ngig unterst{\"u}tzt, es gleichzeitig aber auch erm{\"o}glicht, die Spezifika
      und St{\"a}rken vorhandener Werkzeuge weiterhin zu nutzen.
      
      Das F{\"o}deral-Projekt machte sich zum Ziel, den Maschinen- und Anlagenbauern ein
      solches Projektierungswerkzeug zur Verf{\"u}gung zu stellen.
      
      Das vorliegende Dokument soll die Ergebnisse des F{\"o}deral-Projekts weiteren
      Firmen als Leitfaden f{\"u}r den Aufbau eigener Baukastensystematiken und
      Baukastensysteme dienen. Dazu enth{\"a}lt er folgende Themenschwerpunkte:
      
      - Darstellung der Grundlagen (F{\"o}deral-Methode, F{\"o}derale
      Informations-Architektur etc.)
      
      - Anwendung von Methode und Werkzeug am Beispiel einer Demonstrationsfr{\"a}sanlage
      
      - Anwendung von Methode und Werkzeug bei den Firmen Homag und Nagel
      
      - Erfahrungen der F{\"o}deral-Partner},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=BOOK-2004-01&engl=1}
}