Publications

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Journal Article
Petrakis E.G.M., Varelas G, Hliaoutakis A, Raftopoulou P.  2006.  X-Similarity: Computing Semantic Similarity between Concepts from Different Ontologies. Journal of Digital Information Management (JDIM).
Vassilakis C, Lepouras G, Halatsis C., Lobo TPariente.  2005.  An XML model for electronic services. Electronic Government. 2:41-55.
Vassilakis C, Kotis K, Spiliotopoulos D, Margaris D, Kasapakis V, Anagnostopoulos C-N, Santipantakis G, Vouros GA, Kotsilieris T, Petukhova V et al..  2020.  A Semantic Mixed Reality Framework for Shared Cultural Experiences Ecosystems. Big Data and Cognitive Computing. 4:6.
Spiliopoulou M., Hatzopoulos M., Vassilakis C.  1993.  Parallel Optimisation of Join Queries Using a Technique of Exhaustive Nature. Computers and Artificial Intelligence. 12:145–166.
Katifori A, Halatsis C., Lepouras G, Vassilakis C, Giannopoulou E.G..  2007.  Ontology visualization methods - A survey. ACM Computing Surveys. 39:10:1-10:43.
Vassilakis C, Lepouras G, Halatsis C..  2007.  A knowledge-based approach for developing multi-channel e-government services. Electronic Commerce Research and Applications. 6:113-124.
Torou E, Katifori A, Vassilakis C, Lepouras G, Halatsis C..  2010.  Historical research in archives: user methodology and supporting tools. International Journal on Digital Libraries. 11(1):25–36.
Dix A, Lepouras G, Katifori A, Vassilakis C, Catarci T, Poggi A, Ioannidis Y, Morae M, Daradimos I., Md.Akima N et al..  2010.  From the web of data to a world of action. Journal of Web Semantics. 8 issue 4:394-408.
Zervakis L, Setty V, Tryfonopoulos C, Hose K.  2019.  Efficient Continuous Multi-Query Processing over Graph Streams. CoRR. abs/1902.05134
Lepouras G, Vassilakis C, Halatsis C., Georgiadis P..  2007.  Domain expert user development: The smartgov approach. Communications of the ACM. 50:79-83.
Spiliopoulou M., Hatzopoulos M., Vassilakis C.  1996.  A cost model for the estimation of query execution time in a parallel environment supporting pipeline. Computers and Artificial Intelligence. 15:341-368.
Vassilakis C, Lepouras G, Fraser J, Haston S.  2005.  Barriers To Electronic Service Development. e-Service Journal. Fall 2005:41-63.
Conference Paper
Golemati M., Vassilakis C, Katifori A, Lepouras G, Halatsis C..  2009.  Visualizing Hierarchies: Evaluating the Efficiency and Cognitive Effects of Six Visualization Techniques for Browsing and Management Tasks. Information Visualization 2009, book of abstracts.
Katifori A, Vassilakis C, Lepouras G, Daradimos I., Halatsis C..  2006.  Visualizing a temporally-enhanced ontology. AVI '06: Proceedings of the working conference on Advanced visual interfaces. :488–491.
Katifori A, Vassilakis C, Lepouras G, Halatsis C..  2014.  Visualization method effectiveness in ontology-based information retrieval tasks involving entity evolution. Proceedings of SMAP 2014.
Spiliopoulou M., Hatzopoulos M., Vassilakis C.  1992.  Using Parallelism and Pipeline for the Optimisation of Join Queries. PARLE '92: Proceedings of the 4th International PARLE Conference on Parallel Architectures and Languages Europe. :279–294.
Katifori A, Torou E, Vassilakis C, Halatsis C..  2008.  Supporting research in historical archives: Historical information visualization and modeling requirements. Proceedings of the International Conference on Information Visualisation. :32-37.
Tambouris E., Boukis G., Vassilakis C, Lepouras G, Rouvas S., Canadas R., Heredia S., Usero J.CLopez.  2002.  SMARTGOV: A Governmental Knowledge-based Platform for Public Sector Online Services. Proceedings KMGov2002. :173–185.
Katifori A, Torou E, Vassilakis C, Lepouras G, Halatsis C..  2008.  Selected results of a comparative study of four ontology visualization methods for information retrieval tasks. Proceedings of the 2nd International Conference on Research Challenges in Information Science, RCIS 2008. :133-140.
Zimmer C, Heinz J, Tryfonopoulos C, Weikum G.  2008.  P2P Information Retrieval and Filtering with MAPS. Proccedings of the IEEE International Conference on Peer-to-Peer Computing (P2P).