Publications
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2000. Querying temporal and spatial constraint networks in PTIME. Artif. Intell.. 123:223–263.
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2003. Spatio-Temporal Databases: The CHOROCHRONOS Approach. Lecture Notes in Computer Science. 2520
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1999. Tractable Query Answering in Indefinite Constraint Databases: Basic Results and Applications to Querying Spatiotemporal Information. Spatio-Temporal Database Management, International Workshop STDBM'99, Edinburgh, Scotland, September 10-11, 1999, Proceedings. :204–223.
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2006. Logic and Computational Complexity for Boolean Information Retrieval. IEEE Trans. Knowl. Data Eng.. 18:1659–1666.
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2002. Peer-to-peer Agent Systems for Textual Information Dissemination: Algorithms and Complexity. Proceedings of the UK Workshop on Multiagent Systems (UKMAS).
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1999. Querying Temporal Constraint Networks in PTIME. Proceedings of the Sixteenth National Conference on Artificial Intelligence and Eleventh Conference on Innovative Applications of Artificial Intelligence, July 18-22, 1999, Orlando, Florida, USA.. :745–750.
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2003. Selective Information Dissemination in P2P Networks: Problems and Solutions. SIGMOD Record, Special Issue on Peer-to-Peer Data Management. 32:71-76.
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2002. Efficient Agent-Based Dissemination of Textual Information. Proceedings of the 2nd Hellenic Conference on Artificial Intelligence (SETN).
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2002. Data Models and Languages for Agent-Based Textual Information Dissemination. Proceedings of the 6th International Workshop on Cooperative Information Agents (CIA).
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2002. Information Alert in Distributed Digital Libraries: The Models, Languages, and Architecture of DIAS. Proceedings of the 6th European Conference on Research and Advanced Technology for Digital Libraries (ECDL).
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2021. Cyber-Security Training Evaluation Metrics. Proceedings of the 2021 IEEE International Conference on Cyber Security and Resilience.
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2000. Function oriented history representation in databases. Computers and Artificial Intelligence. 19:417-444.
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2002. Design and Management of Data Warehouses 2002, Proceedings of the 4th Intl. Workshop DMDW'2002, Toronto, Canada, May 27, 2002. CEUR Workshop Proceedings. 58
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2026. Optimizing Collaborative Filtering for Accurate Rating Predictions in Very Sparse Datasets. Future Internet. 18:114.
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2001. e-Citizens and e-Consumers: Is There a Difference? Proceedings of the PCHCI 2001 Workshop: "Transforming Web Surfers to E-Shoppers". :47-50.
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2014. Towards a Learning Analytics Platform for Supporting the Educational Process. Proceedings of the 5th Conference on Information, Intelligence, Systems & Application (IISA2014).
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2000. Multilingual Web Site Construction and Maintenance. Proceedings of the SCI 2000 conference. :56-61.
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2004. Tailorability in the context of E-government Information Systems: An approach. Proceedings of the IRMA 2004 conference.
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2003. A system to support dissemination of knowledge and sharing of experiences in the working environment: Review Code 066. International Journal of Continuing Engineering Education and Lifelong Learning. 13:248-257.
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2001. Building a VR - Museum in a Museum. Proceedings of the Third International Virtual Reality Conference, VRIC2001.
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2004. Virtual museums for all: Employing game technology for edutainment. Virtual Reality. 8:96–106.
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2006. Encyclopedia of E-Commerce, E-Government and Mobile Commerce. :1064–1069.
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2005. An active ontology-based blackboard architecture for Web service interoperability. 2005 International Conference on Services Systems and Services Management, Proceedings of ICSSSM'05. 1:573-578.
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2006. Encyclopedia of E-Commerce, E-Government and Mobile Commerce. :1–6.
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