machine learning, knowledge discovery, artificial intelligence, personalization, user modelling, information filtering, information extraction, event recognition, ontology learning, grammar learning, Web mining
Current and Recent Activities
We are coordinating the BioASQ project, which will intitiate a challenge on large-scale biomedical semantic indexing and question answering.
Ten Selected Recent Publications
In cooperation with Scify, we are offering our generic personalization server PServer for free.
We developed a text analytics service for public consultations; we call it gov.insight (in Greek). gov.insight in the Greek news (Epikaira, Naftemporiki).
Check the results of the PASCAL Large Scale Hierarchical Text Classification challenge.
We have recently organised the ECML/PKDD 2012, Discovery Challenge Workshop.
We are also participating in the PASCAL2 network of excellence.
The projects SYNC3, PRONTO, CASAM and SERVIVE have been completed.
Undergrad and postgrad theses by the division of Intelligent Information Systems (in Greek).
Serving in the editorial boards of Real-Time Business Insights, UMUAI and COIN.
A. Artikis, A. Skarlatidis, F. Portet and G. Paliouras, "Logic-Based Event Recognition," The Knowledge Engineering Review, v. 27, n. 4, pp. 469-506, 2012. (KER online version) (pdf preprint)
G. Paliouras, "Discovery of Web user communities and their role in personalization," Special Issue on Coming of Age: Celebrating a Quarter Century of User Modeling and Personalization, J. Kay and G. McCalla (editors), User Modeling and User-Adapted Interaction, v. 22, n. 1-2, pp. 151-175, 2012. (UMUAI online version) (pdf preprint)
A. Artikis, M. Sergot and G. Paliouras, "Run-time composite event recognition," Proceedings of the 6th ACM International Conference on Distributed Event-Based Systems (DEBS), pp. 69-80, 2012. (ACM online version) (pdf)
E. Zavitsanos, G. Paliouras and G. Vouros, "Non-Parametric Estimation of Topic Hierarchies from Texts with Hierarchical Dirichlet Processes," Journal of Machine Learning Research, v. 12, pp. 2749-2775, 2011. (JMLR online version) (pdf)
E. Zavitsanos, G. Paliouras and G. Vouros, "Gold Standard Evaluation of Ontology Learning Methods Through Ontology Transformation and Alignment," IEEE Transactions on Knowledge and Data Engineering, v. 23, n. 11, pp. 1635-1648, 2011. (IEEE online version) (pdf preprint)
G. Paliouras, C.D. Spyropoulos and G. Tsatsaronis (editors), Knowledge-Driven Multimedia Information Extraction and Ontology Evolution - Bridging the Semantic Gap. Lecture Notes in Artificial Intelligence, n. 6050, Springer-Verlag, 2011. (online version)
A. Skarlatidis, G. Paliouras, G. Vouros and A. Artikis, "Probabilistic Event Calculus based on Markov Logic Networks," Proceedings of the 5th International Symposium on Rules: Research Based and Industry Focused (RuleML), pp. 155-170, 2011. (Springer online version) (pdf)
D. Pierrakos, G. Paliouras, "Personalizing Web Directories with the aid of Web Usage Data," IEEE Transactions on Knowledge and Data Engineering, v. 22, n. 9, pp. 1331-1344, 2010. (abstract) (IEEE online version) (pdf preprint)
S. Petridis, G. Paliouras and S. Perantonis, "Allenís hourglass: probabilistic treatment of interval relations," Proceedings of the 17th International Symposium on Temporal Representation and Reasoning (TIME), pp. 87-94, 2010. (IEEE online version) (pdf)
G. Petasis, V. Karkaletsis, G. Paliouras and C.D. Spyropoulos, "Learning context-free grammars to extract relations from text," In Proceedings of the the European Conference on Artificial Intelligence (ECAI) , IOS Press, pp. 303-307, Patras, Greece, July 2008. (abstract) (pdf)