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Displaying 1-9 out of 9 total
Converting a Historical Architecture Encyclopedia into a Semantic Knowledge Base
Found in: IEEE Intelligent Systems
By René Witte, Ralf Krestel, Thomas Kappler, Peter C. Lockemann
Issue Date:January 2010
pp. 58-67
<p>Digitizing a historical document using ontologies and natural language processing techniques can transform it from arcane text to a useful knowledge base.</p>
Agents and Databases: Friends or Foes?
Found in: Database Engineering and Applications Symposium, International
By Peter C. Lockemann, René Witte
Issue Date:July 2005
pp. 137-147
On first glance agent technology seems more like a hostile intruder into the database world. On the other hand, the two could easily complement each other, since agents carry out information processes whereas databases supply information to processes. None...
Modular Development of Multimedia Courseware
Found in: Web Information Systems Engineering, International Conference on
By Khaldoun Ateyeh, Jutta A. Mülle, Peter C. Lockemann
Issue Date:June 2000
pp. 2179
The use of multimedia in courseware and web-based learning is a current topic. This is influenced by the wide availability and the permanently improving technical possibilities. The employment of multimedia technology in education makes it possible to illu...
Data abstractions for database systems
Found in: ACM Transactions on Database Systems (TODS)
By Heinrich C. Mayr, Peter C. Lockemann, Wolfgang H. Weil, Wolfgang H. Wohlleber
Issue Date:March 1979
pp. 60-75
Data abstractions were originally conceived as a specification tool in programming. They also appear to be useful for exploring and explaining the capabilities and shortcomings of the data definition and manipulation facilities of present-day database syst...
Agent dependability as an architectural issue
Found in: Proceedings of the fifth international joint conference on Autonomous agents and multiagent systems (AAMAS '06)
By Jens Nimis, Peter C. Lockemann
Issue Date:May 2006
pp. 1101-1103
The paper demonstrates how a layered reference architecture for software agents provides a framework for a dependability model that allows to associate the sources of failures and the ensuing error handling with a specific layer, thus integrating dependabi...
Reactive consistency control in deductive databases
Found in: ACM Transactions on Database Systems (TODS)
By Guido Moerkotte, Peter C. Lockemann
Issue Date:March 1988
pp. 670-702
The paper by Ahad et al. [1] derives an analytical expression to estimate the cardinality of the projection of a database relation. In this note, we propose to show that this expression is in error even when all the parameters are assumed to be constant. W...
An object-oriented system for engineering applications
Found in: Proceedings of the 1987 ACM SIGMOD international conference on Management of data (SIGMOD '87)
By Alfons Kemper, Mechtild Wallrath, Peter C. Lockemann
Issue Date:May 1987
pp. 349-362
One of the most promising approaches to database support of engineering applications is the concept of object-oriented database management. Object-orientation is usually approached from either a behavioral or structural viewpoint. The former emphasizes the...
Acquisition of terminological knowledge using database design techniques
Found in: Proceedings of the 1985 ACM SIGMOD international conference on Management of data (SIGMOD '85)
By Christoph F. Eick, Peter C. Lockemann
Issue Date:May 1985
pp. 84-94
Relational algebras as developed by Codd and his followers are extended by noting an equivalence with functional languages. This leads to higher order relations, recursive definitions of relations, and the use of higher order relations as recursive data st...
Database hosting in strongly-typed programming languages
Found in: ACM Transactions on Database Systems (TODS)
By Martin Bever, Peter C. Lockemann
Issue Date:March 1985
pp. 107-126
Database system support has become an essential part of many computer applications, which have extended beyond the more traditional commercial applications to, among others, engineering applications. Correspondingly, application programming with the need t...