Editorial: Journals

  • Reviewer of the Journal of Web Semantics (JWS), 2008-2011
  • Editorial Board of the Semantic Web Journal, 2011
  • Reviewer of the Journal of Information Technology & Tourism (JITT), 2010-2011
  • Reviewer of the Journal on Social Network Analysis and Mining (SNAM), 2010-2011
  • Reviewer of IEEE Internet Computing, 2010
  • Reviewer of ACM Transactions on the Web (ACM TWEB), 2008-2009
  • Reviewer of the International Journal of Metadata, Semantics, and Ontologies (IJMSO), 2007-2010
  • Reviewer of IEEE Transactions on Knowledge and Data Engineering (TKDE), 2009
  • Reviewer of the International Journal on Knowledge and Information Systems (KAIS), 2009
  • Reviewer of the IEEE Journal on Selected Areas in Communications (JSAC), 2006

Editorial: Conferences

  • PC Member of the International Semantic Web Conference (ISWC 2008-2010)
  • PC Member of the European Semantic Web Conference (ESWC 2008-2011)
  • PC member of the 19th International World Wide Web Conference (WWW 2010)
  • PC Member of the International Conference on Ontologies, Databases, and Applications of Semantics (ODBASE 2007-2009)
  • PC member of the International Conference on P2P, Parallel, Grid, Cloud and Internet Computing (3PGCIC 2010)
  • PC member of the European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML/PKDD 2009)
  • PC Member of the International Conference on Knowledge Discovery (ICKD 2009)
  • PC Member of the IEEE International Conference on P2P Computing (P2P 2009)
  • PC Member of the International Conference on Knowledge Discovery and Information Retrieval (KDIR 2009)
  • PC Member of the International Conference on Database and Expert Systems Applications (DEXA 2007-2009)
  • PC Member of the 16th European Conference on Information Systems (ECIS'08)
  • PC Member of the International Conference on Semantic and Digital Media Technologies (SAMT'07)
  • PC Member of the Multi-Conference on Computer Science in Economics (MKWI'08)
  • PC Member of the 13th International Conference on Parallel and Distributed Systems (ICPADS'07)
  • Peer Reviewer for the 16th Intl. Symposium on Methodologies for Intelligent Systems (ISMIS'06)
  • PC Member of the 1st Intl. Conference on Semantics and Digital Media Technology (SAMT'06)
  • PC Member of the 12th Intl. Conference on Cooperative Information Systems (CoopIS'04)
  • PC Member of the 29th Intl. Conference on Very Large Data Bases (VLDB'03)

Editorial: Workshops

  • PC Member of Springer post-proceedings of the International Workshop on Mining Ubiqitous and Social Environments" (MUSE 2010)
  • PC Member of the Workshop on Uncertainty Reasoning for the Semantic Web (URSW) 2007-2010
  • PC Member of the 4th Intl. Workshop on Databases, Information Systems and Peer-to-Peer Computing (DBISP2P) 2006-2008
  • PC Member of the Semantic Search Workshop (SemSearch), 2008-2011
  • PC Member of the International Workshop 'Bridging the Gap between Semantic Web
  • and Web 2.0' (SemNet'07) at the 4th European Semantic Web Conference (ESWC'07)
  • PC Member of the IEEE Symposium on Computers and Communications (ISCC'06), Workshop on Distributed Agent-based Retrieval Tools (DART'06)

EU Evaluations

  • Expert Evaluator of the 6th EU Framework Programme (Priority 2 - Information Society Technologies, Call 5), 2005