Institut für Parallele und Verteilte Systeme (IPVS)

Publikationen

Eine Übersicht der Publikationen des Instituts für Parallele und Verteilte Systeme

Publikationen AS: Bibliographie 2003 BibTeX

 
@inproceedings {INPROC-2003-40,
   author = {Christoph Mangold and Bernhard Mitschang},
   title = {{Enabling a Reuse Oriented Engineering Methodology}},
   booktitle = {Proceedings of the Second IASTED International Conference on Information and Knowledge Sharing},
   editor = {Wesley Chu},
   address = {Anaheim, Calgary, Zurich},
   publisher = {ACTA Press},
   institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
   pages = {6--11},
   type = {Konferenz-Beitrag},
   month = {November},
   year = {2003},
   isbn = {0-88986-396-2},
   keywords = {Engineering Methodology; Reuse; Representation; Knowledge Engineering and Management},
   language = {Englisch},
   cr-category = {H.1.1 Systems and Information Theory,     H.1.2 User/Machine Systems},
   department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Anwendersoftware},
   abstract = {In the domain of machine engineering the reuse of design data is an important but complex instrument to improve quality and shorten development time. The successful reuse of design data requires both, a machine engineering specific methodology and the support by appropriate information system technology. In this paper we introduce a machine engineering methodology that is based on several reuse stages. Our approach to support the methodology with an appropriate information system uses a simple graph based information model where reuse stages are re- flected as layers. We also show how reuse is represented in the model.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-40&engl=0}
}
@inproceedings {INPROC-2003-27,
   author = {Marcello Mariucci and Bernhard Mitschang},
   title = {{Extending Web Service Technology towards an Earth Observation Integration Framework}},
   booktitle = {Proceedings of the Forum Session at the First International Conference on Service Oriented Computing: ICSOC03; Trento, Italy, Dec. 15-18, 2003},
   editor = {Marco Aiello and Chris Bussler and Vincenzo D'Andrea and Jian. Yang},
   address = {Trento},
   publisher = {University of Trento},
   institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
   series = {Technical Report, Information and Communication Technology, University of Trento},
   volume = {DIT-03-056},
   pages = {117--128},
   type = {Konferenz-Beitrag},
   month = {November},
   year = {2003},
   keywords = {Earth Observation; Framework; Web Services; Repository; Workflow Management},
   language = {Englisch},
   cr-category = {D.2.2 Software Engineering Design Tools and Techniques,     D.2.6 Software Engineering Programming Environments,     D.2.9 Software Engineering Management,     D.2.10 Software Engineering Design,     D.2.11 Software Engineering Software Architectures,     D.2.13 Software Engineering Reusable Software,     H.3.4 Information Storage and Retrieval Systems and Software,     H.4 Information Systems Applications},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-27/INPROC-2003-27.pdf,     ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-27/INPROC-2003-27.ps},
   contact = {mariucci@informatik.uni-stuttgart.de},
   department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Anwendersoftware},
   abstract = {In this paper we describe the implementation of a service-based application integration solution for the complex domain of Earth Observation (EO) application systems. The presented approach is based on an EO integration framework. It supports the concatenation of disparate software applications to flexible EO process chains. Resulting EO services are provided to end users by means of Web Service technology. We demonstrate that current standard technology is not sufficient to dynamically publish and interactively invoke EO services over the Web. We describe necessary extensions and adaptations.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-27&engl=0}
}
@inproceedings {INPROC-2003-23,
   author = {Marcello Mariucci and Frank Wagner and Gunter Martens and Jens K{\"u}nzl},
   title = {{ARSENAL: Model-driven Earth Observation Integration Framework}},
   booktitle = {Proceedings of the Fifth International Conference on Information Integration and Web-based Applications \& Services: iiWAS '03, Demonstration Paper; Jakarta, Indonesia, September 15-17, 2003. Vol. 170},
   editor = {Gabriele Kotsis and Stephane Bressan and Barbara Catania and Ismail Khalil Ibrahim},
   publisher = {Oesterreichische Computer Gesellschaft},
   institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
   pages = {227--231},
   type = {Konferenz-Beitrag},
   month = {September},
   year = {2003},
   isbn = {3-85403-170-10},
   keywords = {Implementation Architecture Prototype, Model-driven Architecture, Process-oriented Application Integration, Model-driven Integration Process, Repository System},
   language = {Englisch},
   cr-category = {H.3.5 Online Information Services,     J.2 Physical Sciences and Engineering,     D.2.2 Software Engineering Design Tools and Techniques},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-23/INPROC-2003-23.pdf},
   contact = {For more information please contact mariucci@informatik.uni-stuttgart.de},
   department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Anwendersoftware},
   abstract = {An Earth Observation (EO) integration framework is an application integration solution for sup-porting the development and execution of EO services. EO services are based on the intensive use of large data sets from space. They process raw EO data sets into increasingly specialized products until a certain level of quality is achieved. This processing requires the tight cooperation of several distributed experts, and intensive computation across a coordinated sequence of both, interactive and automatic processing steps. Appropriate examples for such EO services are the generation of weather forecasts, forest fire detection, and oil slick monitoring. EO services can be characterized as highly flexible structures, which constantly need to be adapted to evolving spacecraft and proc-essing technologies. We suggest a model-driven EO integration framework solution that adequately copes with the flexible development, customization, and execution of reusable EO services. Our prototype includes a comprehensive integration model that accurately handles system metadata throughout the software life cycle, and significantly enhances the EO service development process in terms of quality, reuse, and adaptability. The prototype employs repository technology for man-aging model related issues, as well as workflow and Web service technology for execution pur-poses. It is mainly built upon commercial products, which are seamlessly combined by appropriate 'glue' components.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-23&engl=0}
}
@inproceedings {INPROC-2003-22,
   author = {Marcello Mariucci and Clemens Dorda and Bernhard Mitschang},
   title = {{Design and Implementation of a Model-driven Earth Observation Integration Framework}},
   booktitle = {Proceedings of the Fifth International Conference on Information Integration and Web-based Applications \& Services: iiWAS '03; Jakarta, Indonesia, September 15-17, 2003. Vol. 170},
   editor = {Gabriele Kotsis and Stephane Bressan and Barbara Catania and Ismail Khalil Ibrahim},
   publisher = {Oesterreichische Computer Gesellschaft},
   institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
   pages = {215--225},
   type = {Konferenz-Beitrag},
   month = {September},
   year = {2003},
   isbn = {3-85403-170-10},
   keywords = {Model-driven Architecture, Process-oriented Application Integration, Model-driven Integration Process, Repository System},
   language = {Englisch},
   cr-category = {H.3.5 Online Information Services,     J.2 Physical Sciences and Engineering,     D.2.2 Software Engineering Design Tools and Techniques},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-22/INPROC-2003-22.pdf,     ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-22/INPROC-2003-22.ps},
   contact = {For more information please contact mariucci@informatik.uni-stuttgart.de},
   department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Anwendersoftware},
   abstract = {An Earth Observation (EO) integration framework is an application integration solution for supporting the development and execution of EO services. EO services are based on the intensive use of large data sets from space, and require the tight cooperation of several distributed experts. They can be characterized as highly flexible structures, which constantly need to be adapted to evolving spacecraft and processing technologies. In this paper we introduce a model-driven approach for an EO integration framework. We describe a comprehensive integration model that adequately copes with the flexible development, customization, and execution of EO services. The accurate treatment of related model instances throughout the software life cycle significantly enhances the EO service development process in terms of quality, reuse, and adaptability. We discuss technological aspects for the realization of such an integration framework, and outline our prototype implementation that is mainly built upon commercial products. We demonstrate that such a model-driven approach can be realized by employing repository technology for managing model related issues, as well as workflow and Web service technology for execution purposes.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-22&engl=0}
}
@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 = {Universit{\"a}t Stuttgart : Sonderforschungsbereich SFB 627 (Nexus: Umgebungsmodelle f{\"u}r mobile kontextbezogene Systeme), Germany},
   type = {Konferenz-Beitrag},
   month = {September},
   year = {2003},
   keywords = {Umgebungsmodelle; kontext-bezogene Systeme; Nexus; Spatial World Models; context-aware systems},
   language = {Deutsch},
   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 = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Verteilte Systeme;     Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Anwendersoftware;     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=0}
}
@inproceedings {INPROC-2003-16,
   author = {Daniela Nicklas and Matthias Grossmann and Thomas Schwarz},
   title = {{NexusScout: An Advanced Location-Based Application On A Distributed, Open Mediation Platform}},
   booktitle = {Proceedings of the 29th VLDB Conference, Berlin, Germany, 2003},
   publisher = {Morgan Kaufmann Publishers},
   institution = {Universit{\"a}t Stuttgart : Sonderforschungsbereich SFB 627 (Nexus: Umgebungsmodelle f{\"u}r mobile kontextbezogene Systeme), Germany},
   pages = {0--1},
   type = {Konferenz-Beitrag},
   month = {September},
   year = {2003},
   isbn = {0-12-722442-4},
   language = {Englisch},
   cr-category = {A.0 General Literature, General},
   department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Anwendersoftware},
   abstract = {This demo shows several advanced use cases of location-based services and demonstrates how these use cases are facilitated by a mediation middleware for spatial information, the Nexus Platform. The scenario shows how a mobile user can access location-based information via so called Virtual Information Towers, register spatial events, send and receive geographical messages or find her friends by displaying other mobile users. The platform facilitates these functions by transparently combining spatial data from a dynamically changing set of data providers, tracking mobile objects and observing registered spatial events.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-16&engl=0}
}
@inproceedings {INPROC-2003-04,
   author = {Tobias Kraft and Holger Schwarz and Ralf Rantzau and Bernhard Mitschang},
   title = {{Coarse-Grained Optimization: Techniques for Rewriting SQL Statement Sequences}},
   booktitle = {Proceedings of 29th International Conference on Very Large Data Bases (VLDB 2003), Berlin, September 9-12, 2003},
   publisher = {Morgan Kaufmann},
   institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Germany},
   pages = {488--499},
   type = {Konferenz-Beitrag},
   month = {September},
   year = {2003},
   isbn = {0-12-722442-4},
   keywords = {SQL; Query Optimization; OLAP},
   language = {Englisch},
   cr-category = {H.2.4 Database Management Systems},
   department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte H{\"o}chstleistungsrechner, Anwendersoftware},
   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 provided by a user. Unfortunately, these sequences cannot be processed efficiently by current database systems because they typically optimize and process each statement in isolation. We propose a practical approach for this optimization problem, called ``coarse-grained optimization,'' complementing the conventional query optimization phase. This new approach exploits the fact that statements of a sequence are correlated since they belong to the same information request. A lightweight heuristic optimizer modifies a given statement sequence using a small set of rewrite rules. Since the optimizer is part of a separate system layer, it is independent of but can be tuned to a specific underlying database system. We discuss implementation details and demonstrate that our approach leads to significant performance improvements.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-04&engl=0}
}
@inproceedings {INPROC-2003-03,
   author = {Bernhard Mitschang and Engelbert Westk{\"a}mper and Carmen Constantinescu and Uwe Heinkel and Benno L{\"o}ffler and Ralf Rantzau and Ralph Winkler},
   title = {{Divide et Impera: A Flexible Integration of Layout Planning and Logistics Simulation through Data Change Propagation}},
   booktitle = {Proceedings of the 36th CIRP International Seminar on Manufacturing Systems (CIRP ISMS 2003), June 03-05, 2003 Saarland University, Saarbr{\"u}cken, Germany},
   editor = {C. Weber and H. Bley and G. Hirt},
   address = {Saarbr{\"u}cken, Germany},
   publisher = {Saarland University},
   institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Germany},
   pages = {411--418},
   type = {Konferenz-Beitrag},
   month = {Juni},
   year = {2003},
   isbn = {3-930429-58-6},
   keywords = {integration of information systems; XML technologies; facility layout planning; logistics simulation},
   language = {Englisch},
   cr-category = {H.2.5 Heterogeneous Databases,     J.6 Computer-Aided Engineering},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-03/INPROC-2003-03.pdf},
   contact = {Uwe.Heinkel@informatik.uni-stuttgart.de},
   department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte H{\"o}chstleistungsrechner, Anwendersoftware},
   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=INPROC-2003-03&engl=0}
}
@inproceedings {INPROC-2003-02,
   author = {Ralf Rantzau},
   title = {{Processing Frequent Itemset Discovery Queries by Division and Set Containment Join Operators}},
   booktitle = {Proceedings of the ACM SIGMOD Workshop on Research Issues in Data Mining and Knowledge Discovery (DMKD), San Diego, California, USA, June 13, 2003},
   editor = {Mohammed Zaki and Charu Aggarwal},
   publisher = {Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA},
   institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Germany},
   series = {Report No. 03-05},
   pages = {20--27},
   type = {Konferenz-Beitrag},
   month = {Juni},
   year = {2003},
   keywords = {association rule discovery; relational division; set containment join},
   language = {Englisch},
   cr-category = {H.2.4 Database Management Systems,     H.2.8 Database Applications},
   ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2003-02/INPROC-2003-02.pdf,     http://www.cs.rpi.edu/~zaki/DMKD03/},
   contact = {rrantzau@acm.org},
   department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte H{\"o}chstleistungsrechner, Anwendersoftware},
   abstract = {SQL-based data mining algorithms are rarely used in practice today. Most performance experiments have shown that SQL-based approaches are inferior to main-memory algorithms. Nevertheless, database vendors try to integrate analysis functionalities to some extent into their query execution and optimization components in order to narrow the gap between data and processing. Such a database support is particularly important when data mining applications need to analyze very large datasets or when they need access current data, not a possibly outdated copy of it. We investigate approaches based on SQL for the problem of finding frequent itemsets in a transaction table, including an algorithm that we recently proposed, called Quiver, which employs universal and existential quantifications. This approach employs a table schema for itemsets that is similar to the commonly used vertical layout for transactions: each item of an itemset is stored in a separate row. We argue that expressing the frequent itemset discovery problem using quantifications offers interesting opportunities to process such queries using set containment join or set containment division operators, which are not yet available in commercial database systems. Initial performance experiments reveal that Quiver cannot be processed efficiently by commercial DBMS. However, our experiments with query execution plans that use operators realizing set containment tests suggest that an efficient processing of Quiver is possible.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-02&engl=0}
}
@inproceedings {INPROC-2003-01,
   author = {Christoph Mangold and Ralf Rantzau and Bernhard Mitschang},
   title = {{F{\"o}deral: Management of Engineering Data Using a Semistructured Data Model}},
   booktitle = {Proceedings of the International Conference on Enterprise Information Systems (ICEIS), Angers, France, April 2003},
   publisher = {Unknown},
   institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Germany},
   type = {Konferenz-Beitrag},
   month = {April},
   year = {2003},
   isbn = {972-98816-1-8},
   keywords = {product data management, semistructured data, integration, data modeling},
   language = {Englisch},
   cr-category = {H.2 Database Management},
   contact = {christoph.mangold@informatik.uni-stuttgart.de},
   department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte H{\"o}chstleistungsrechner, Anwendersoftware},
   abstract = {The F{\"o}deral system is a flexible repository for the management, integration and modeling of product data. Current systems in this domain employ object-oriented data models. Whereas this is adequate for the management of product data, it proves insufficient for integration and modeling. Present semistructured data models, however, are suited ideally for integration, but data management and also modeling is a problem. In this paper we describe our approach to narrow down the gap between structured and semistructured data models. We present the F{\"o}deral information system which employs a new semistructured data model and show how this model can be employed in the context of management, integration, and modeling of engineering data.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2003-01&engl=0}
}
@article {ART-2003-17,
   author = {Bernhard Mitschang},
   title = {{Data propagation as an enabling technology for collaboration and cooperative information systems}},
   journal = {Computers in Industry},
   address = {Amsterdam},
   publisher = {Elsevier Science Publishers B.V.},
   volume = {52},
   pages = {59--69},
   type = {Artikel in Zeitschrift},
   month = {September},
   year = {2003},
   language = {Englisch},
   cr-category = {H.5.3 Group and Organization Interfaces},
   department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Anwendersoftware},
   abstract = {Collaboration in cooperative information systems, as occurring in concurrent design and engineering, exploits common work and information spaces. In this paper we present the Transaction-Oriented Group and Coordination Service for Data-Centric Applications (TOGA) and the DataPropagator CHAMPAGNE that together realize a shared information space that is controlled by a basic collaboration service. Our approach enables both, firstly, the evolution of a set of separate applications to form a cooperative information system, i.e. it provides a technique towards component-oriented system engineering. Secondly, it can be exploited as a basic service within collaboration frameworks to effectively manage common work and information spaces.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2003-17&engl=0}
}
@article {ART-2003-03,
   author = {Holger Schwarz and Tobias Kraft and Ralf Rantzau and Bernhard Mitschang},
   title = {{Optimierung von Anfragesequenzen in Business-Intelligence-Anwendungen}},
   journal = {it - Information Technology},
   address = {M{\"u}nchen},
   publisher = {Oldenbourg},
   volume = {45},
   number = {4},
   pages = {196--202},
   type = {Artikel in Zeitschrift},
   month = {August},
   year = {2003},
   keywords = {Data Warehouse, Business Intelligence, Anfragesequenzen, OLAP, Data Mining},
   language = {Deutsch},
   cr-category = {H.2.4 Database Management Systems,     H.2.7 Database Administration,     H.2.8 Database Applications},
   department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Anwendersoftware},
   abstract = {Zur Analyse der Daten in einem Data Warehouse kommen unterschiedliche Business-Intelligence-Anwendungen zum Einsatz. Ein wichtiger Erfolgsfaktor f{\"u}r deren Nutzung ist die Effizienz, mit der die erstellten Anfragen ausgef{\"u}hrt werden. In diesem Beitrag wird zun{\"a}chst das typische Verarbeitungsszenario f{\"u}r generierte Anfragesequenzen im Bereich Business Intelligence erl{\"a}utert. Darauf aufbauend wird eine Reihe anwendungsneutraler Optimierungsstrategien erl{\"a}utert und bewertet. Anhand von Messergebnissen wird gezeigt, dass es sich insbesondere bei der Restrukturierung von Anfragesequenzen um einen vielversprechenden Ansatz handelt.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2003-03&engl=0}
}
@article {ART-2003-02,
   author = {Ralf Rantzau and Leonard Shapiro and Bernhard Mitschang and Quan Wang},
   title = {{Algorithms and Applications for Universal Quantification in Relational Databases}},
   journal = {Information Systems},
   editor = {Christian S. Jensen},
   publisher = {Elsevier},
   volume = {28},
   number = {1-2},
   pages = {3--32},
   type = {Artikel in Zeitschrift},
   month = {Januar},
   year = {2003},
   keywords = {query operators; relational division; grouping; set containment join; frequent itemset discovery},
   language = {Englisch},
   cr-category = {H.2.4 Database Management Systems},
   ee = {http://www.elsevier.nl/locate/is},
   contact = {rrantzau@acm.org},
   department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte H{\"o}chstleistungsrechner, Anwendersoftware},
   abstract = {Queries containing universal quantification are used in many applications, including business intelligence applications and in particular data mining. We present a comprehensive survey of the structure and performance of algorithms for universal quantification. We introduce a framework that results in a complete classification of input data for universal quantification. Then we go on to identify the most efficient algorithm for each such class. One of the input data classes has not been covered so far. For this class, we propose several new algorithms. Thus, for the first time, we are able to identify the optimal algorithm to use for any given input dataset. These two classifications of optimal algorithms and input data are important for query optimization. They allow a query optimizer to make the best selection when optimizing at intermediate steps for the quantification problem. In addition to the classification, we show the relationship between relational division and the set containment join and we illustrate the usefulness of employing universal quantifications by presenting a novel approach for frequent itemset discovery.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2003-02&engl=0}
}
@inbook {INBOOK-2003-03,
   author = {Carmen Constantinescu and Uwe Heinkel and Ralf Rantzau and Bernhard Mitschang},
   title = {{A System For Data Change Propagation In Heterogeneous Information Systems}},
   series = {Enterprise Information Systems IV},
   address = {Dordrecht, Netherlands},
   publisher = {Kluwer Academic Publishers},
   pages = {51--59},
   type = {Beitrag in Buch},
   month = {Januar},
   year = {2003},
   isbn = {1-4020-1086-9},
   keywords = {enterprise application integration; manufacturing; repository; propagation},
   language = {Englisch},
   cr-category = {H.3.4 Information Storage and Retrieval Systems and Software},
   contact = {uwe.heinkel@informatik.uni-stuttgart.de},
   department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Anwendersoftware},
   abstract = {Today, it is common that enterprises manage several mostly heterogeneous information systems to supply their production and business processes with data. There is a need to exchange data between the information systems while preserving system autonomy. Hence, an integration approach that relies on a single global enterprise data schema is ruled out. This is also due to the widespread usage of legacy systems. We propose a system, called Propagation Manager, which manages dependencies between data objects stored in different information systems. A script specifying complex data transformations and other sophisticated activities, like the execution of external programs, is associated with each dependency. For example, an object update in a source system can trigger data transformations of the given source data for each destination system that depends on the object. Our system is implemented using current XML technologies. We present the architecture and processing model of our system and demonstrate the benefit of our approach by illustrating an extensive example scenario.},
   url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2003-03&engl=0}
}
 
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