Editorial Board member of

• Fuzzy Sets and Systems (Elsevier), 2007-
• International Journal On Semantic Web and Information Systems, 2011-
• International Journal On Advances in Intelligent Systems (IARIA Journals), 2009-
• International Journal of Hybrid Information Technology (SERSC), 2007-
• Advances in Artificial Intelligence (Hindawi Publishing Corporation), 2011-

Chair, Vice-Chair of

• RR 2012 (6th International Conference on Web Reasoning and Rule Systems, programme committee Co-Chair)
• ICISTM 2012 (6th International Conference on Information Systems, Technology and Management, Co-Chair of Track ``Information Technology'')
• FutureTech 2011 (The 6th International Conference on Future Information Technology, Co-Chair of Track ``Hybrid Information Technology'')
• RuleML 2011 (International Symposium on Rules, Co-Chair of Doctoral Symposium)
• FutureTech 2010 (The 5th International Conference on Future Information Technology, Co-Chair of Track ``Hybrid Information Technology'')
• ISWC 2009 (8th International Semantic Web Conference, Vice-chair of the programme committee)
• ISWC 2008 (7th International Semantic Web Conference, Vice-chair of the programme committee)

Organizations of

• USW 2010 (Uncertainty and the Semantic Web, special session co-located with IEEE WCCI 2010, 2010 IEEE World Congress on Computational Intelligence (WCCI 2010), Organizer)
• VUSW 2009 (Managing Vagueness and Uncertainty in the Semantic Web, co-located with 2009 IEEE/WIC/ACM International Joint Conference on Web Intelligence and Intelligent Agent Technology (WI-IAT 2009), Organizer)

Program committee member of

2012

• AAAI 2012 (26th AAAI Conference on Artificial Intelligence, Senior PC Member)
• KR 2012 (13th International Conference on the Principles of Knowledge Representation and Reasoning)
• SAC 2012 (ACM Symposium on Applied Computing, Track on Information Access and Retrieval)
• SAC 2012 (ACM Symposium on Applied Computing, Track on The Semantic Web and Applications)
• FoIKS 2012 (7th International Symposium on Foundations of Information and Knowledge Systems)
• RuleML 2012 (6th International RuleML Symposium on Rules)
• DEXA 2012 (23rd International Conference on Database- and Expert Systems Applications)
• ECAI 2012 (20th European Conference on Artificial Intelligence)
• JIST 2012 (Joint International Semantic Technology Conference)
• DMSSW 2012 (First International Workshop on Data Management in the Social Semantic Web)
• DL 2012 (The 25th International Workshop on Description Logics)
• UniDL 2012 (2nd International Workshop on Uncertainty in Description Logics)
• GECCO 2012 (Genetic and Evolutionary Computation Conference, Real World Applications track)
• SUM 2012 (6th International Conference on Scalable Uncertainty Management)
• WI 2012 (The 2012 World Intelligence Congress)
• WL4AI 2012 (ECAI 2012 Workshop on Weighted Logics for AI)
• OM 2012 (International Workshop on Ontology Matching)
• ISWC 2012 (11th International Semantic Web Conference)
• GULPTH 2012 (GULP Doctoral Thesis 2012, 9th Italian Convention on Computational Logic CILC 2012)
• URSW 2012 (International Workshop on Uncertainty Reasoning for the Semantic Web)

2011

• IJCAI 2011 (Twenty-second International Joint Conference on Artificial Intelligence, Senior PC Member)
• ISWC 2011 (10th International Semantic Web Conference)
• FOCI 2011 (Symposium on Foundations of Computational Intelligence)
• DBKDA 2011 (Third International Conference on Advances in Databases, Knowledge, and Data Applications)
• SAC 2011 (ACM Symposium on Applied Computing, Track on Information Access and Retrieval)
• SAC 2011 (ACM Symposium on Applied Computing, Track on Track on Semantic Web and Application)
• ESWC 2011 (8h Extended Semantic Web Conference)
• DEXA 2011 (22nd International Conference on Database- and Expert Systems Applications)
• DL 2011 (The 24th International Workshop on Description Logics)
• RR 2011 (5th International Conference on Web Reasoning and Rule Systems)
• AAAI 2011 Tutorial Forum (25th AAAI Conference on Artificial Intelligence)
• GECCO 2011 (Genetic and Evolutionary Computation Conference, Real World Applications track)
• SUM 2011 (5th International Conference on Scalable Uncertainty Management)
• FCTA 2011 (International Conference on Fuzzy Computation Theory and Computation)
• SMAP 2011 (6th International Workshop on Semantic Media Adaptation and Personalization)
• CAEPIA 2011 (14th Conference of the Spanish Association for Artificial Intelligence)
• OM 2011 (International Workshop on Ontology Matching, co-located with the 10th International Semantic Web Conference, ISWC 2011)
• URSW 2011 (International Workshop on Uncertainty Reasoning for the Semantic Web)
• JIST 2011 (Joint International Semantic Technology Conference)
• RuleML@BREF 2011 (5th International RuleML Symposium on Rules)
• RuleML Challenge 2011 (5th International RuleML Symposium on Rules: International Rule Challenge)
• ORDRing 2011 (1st International Workshop on Ordering and Reasoning, collocated with the 10th International Semantic Web Conference, ISWC 2011)

2010

• KR 2010 (Twelfth International Conference on the Principles of Knowledge Representation and Reasoning)
• ISWC 2010 (9th International Semantic Web Conference)
• SOFSEM 2010 (36th International Conference on Current Trends in Theory and Practice of Computer Science)
• DBKDA 2010 (Second International Conference on Advances in Databases, Knowledge, and Data Applications)
• SAC 2010 (ACM Symposium on Applied Computing, Track on Information Access and Retrieval)
• SAC 2010 (ACM Symposium on Applied Computing, Track on Track on Semantic Web and Application)
• DEXA 2010 (21st International Conference on Database- and Expert Systems Applications)
• AIMSA 2010 (14h International Conference on Artificial Intelligence: Methodology, Systems, Applications)
• IPMU 2010 (13th International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems)
• GECCO 2010 (Genetic and Evolutionary Computation Conference, Real World Applications track)
• ECAI 2010 (19th European Conference on Artificial Intelligence)
• UniDL 2010 (1st Workshop on Uncertainty in Description Logics)
• ESWC 2010 (7h Extended Semantic Web Conference)
• RR 2010 (4th International Conference on Web Reasoning and Rule Systems)
• SEMAPRO 2010 (The Fourth International Conference on Advances in Semantic Processing)
• DL 2010 (The 23rd International Workshop on Description Logics)
• IRMLES 2010 (ESWC Workshop on Inductive Reasoning and Machine Learning on the Semantic Web, co-located with 7h Extended Semantic Web Conference)
• SUM 2010 (4th International Conference on Scalable Uncertainty Management)
• FSKD 2010 (7th International Conference on Fuzzy Systems and Knowledge Discovery)
• ISWSA 2010 (The 2010 International Conference on Intelligent Semantic Web – Services and Applications)
• WI 2010 (2010 IEEE / WIC / ACM International Conferences on Web Intelligence)
• ESWC PhD 2010 (7h Extended Semantic Web Conference, PhD Symposium)
• RuleML 2010 (The 4th International Web Rule Symposium: Research Based and Industry Focused)
• ODBASE 2010 (The 9th International Conference on Ontologies, DataBases, and Applications of Semantics)
• ICFC 2010 (International Conference on Fuzzy Computation)
• URSW 2010 (International Workshop on Uncertainty Reasoning for the Semantic Web, collocated with the 9th International Semantic Web Conference, ISWC 2010)
• ICHIT 2010 (International Conference on Hybrid Information Technology)

2009

• IJCAI 2009 (Twenty-first International Joint Conference on Artificial Intelligence)
• IFSA 2009/EUSFLAT 2009 (2009 International Fuzzy Systems Association World Congress and 2009 International Conference of the European Society for Fuzzy Logic and Technology)
• FQAS 2009 (Eighth International Conference on Flexible Query Answering Systems)
• WI 2009 (2009 IEEE / WIC / ACM International Conferences on Web Intelligence)
• DEXA 2009 (20th International Conference on Database- and Expert Systems Applications)
• GECCO 2009 (Genetic and Evolutionary Computation Conference, Real World Applications track)
• ESWC 2009 (6h European Semantic Web Conference)
• IRMLES 2009 (ESWC Workshop on Inductive Reasoning and Machine Learning on the Semantic Web, co-located with 6h European Semantic Web Conference)
• SAC 2009 (ACM Symposium on Applied Computing, Track on Information Access and Retrieval)
• DB 2009 (The First International Conference on Advances in Databases)
• DL 2009 (The 22nd International Workshop on Description Logics)
• SEMAPRO 2009 (The Third International Conference on Advances in Semantic Processing)
• SUM 2009 (3rd International Conference on Scalable Uncertainty Management)
• ODBASE 2009 (The 8th International Conference on Ontologies, DataBases, and Applications of Semantics)
• ICFC 2009 (International Conference on Fuzzy Computation)
• EPIA 2009 (14th Portuguese Conference on Artificial Intelligence, Computational Logic with Applications track)
• IICAI 2009 (4th Indian International Conference on Artificial Intelligence)
• CAEPIA 2009 (Workshop on Computational Logic and AI, co-located with the 13th Conference of the Spanish Association for Artificial Intelligence)
• RuleML 2009 (International RuleML Symposium on Rule Rules, Applications and Interoperability)
• OM 2009 (International Workshop on Ontology Matching, co-located with the 8th International Semantic Web Conference, ISWC 2008)
• ASWC 2009 (Fourth Asian Semantic Web Conference)
• URSW 2009 (International Workshop on Uncertainty Reasoning for the Semantic Web, collocated with the 8th International Semantic Web Conference, ISWC 2009)
• ICHIT 2009 (International Conference on Hybrid Information Technology)
• RuleML Demo Challenge9 (RuleML Demo Challenge within the International RuleML Symposium on Rule Rules, Applications and Interoperability, RuleML 2009)

2008

• OM 2008 (International Workshop on Ontology Matching, co-located with the 7th International Semantic Web Conference, ISWC 2008)
• ODBASE 2008 (The 7th International Conference on Ontologies, DataBases, and Applications of Semantics)
• AREA 2008 (International Workshop on Advancing Reasoning on the Web: Scalability and Commonsense, collocated with ESWC 2008)
• GECCO 2008 (Genetic and Evolutionary Computation Conference, Real World Applications track)
• WCCI 2008 (IEEE World Congress on Computational Intelligence)
• RR 2008 (2nd International Conference on Web Reasoning and Rule Systems)
• JELIA 2008 (11th European Conference on Logics in Artificial Intelligence)
• SUM 2008 (2nd International Conference on Scalable Uncertainty Management)
• ESWC 2008 (5th European Semantic Web Conference)
• SAC 2008 (ACM Symposium on Applied Computing, Track on Information Access and Retrieval)
• DL 2008 (The 21st International Workshop on Description Logics)
• ICHIT 2008 (International Conference on Hybrid Information Technology)
• FLOW 2008 (1st International Workshop on Fuzzy Logic On the Web, co-located with IEEE/WIC/ACM International Conferences on Web Intelligence and Intelligent Agent Technology, WI08 )
• ASWC 2008 (Third Asian Semantic Web Conference)
• URSW 2008 (International Workshop on Uncertainty Reasoning for the Semantic Web, collocated with the 7th International Semantic Web Conference, ISWC 2008)

2007

• URSW 2007 (International Workshop on Uncertainty Reasoning for the Semantic Web, collocated with the 6th International Semantic Web Conference, ISWC 2007)
• OM 2007 (International Workshop on Ontology Matching, collocated with the 6th International Semantic Web Conference, ISWC 2007)
• LSDS-IR 2007 (International Workshop on Large Scale Distributed Systems for Information Retrieval, collocated with the 30th ACM SIGIR Conference, SIGIR07)
• DL 2007 (The 20th International Workshop on Description Logics)
• AAAI 2007 (The 22nd AAAI Conference on Artificial Intelligence)
• WILF 2007 (International Workshop on Fuzzy Logic and Applications)
• ODBASE 2007 (The 6th International Conference on Ontologies, DataBases, and Applications of Semantics)
• OWLED 2007 (Third International Workshop on OWL: Experiences and Directions, co-located with ESWC07)
• FUZZY-IEEE 2007 (IEEE International Conference on Fuzzy Systems)
• ESWC 2007 (4th European Semantic Web Conference)
• WWW 2007 (16th Int. World Wide Web Conference, Semantic Web track)
• SAC 2007 (ACM Symposium on Applied Computing, Track on Information Access and Retrieval)
• ICHIT 2007 (International Conference on Hybrid Information Technology)
• IICAI 2007 (3rd Indian International Conference on Artificial Intelligence)
• SWAP 2007 (4nd Italian Semantic Web Workshop: SEMANTIC WEB APPLICATIONS AND PERSPECTIVES)

2006

• ECAI 2006 (The 17th European Conference on Artificial Intelligence)
• AIMSA 2006 (The Twelfth International Conference on Artificial Intelligence: Methodology, Systems, Applications)
• P2PIR 2006 (Workshop on Information Retrieval in Peer-to-Peer Networks, collocated with the ACM Fifteenth Conference on Information and Knowledge Management -CIKM 2006)
• IKM 2006 (Workshop on Imperfect Knowledge Modeling, collocated with the 15th International Conference on Knowledge Engineering and Knowledge Management Managing Knowledge in a World of Networks -EKAW 2006)
• FQAS 2006 (Seventh International Conference on Flexible Query Answering Systems)
• ISWC 2006 (5th International Semantic Web Conference)
• RoW 2006 (Workshop on Reasoning on the Web, collocated with the 15th World Wide Web Conference -WWW 2006)
• OM 2006 (International Workshop on Ontology Matching, collocated with the 5th International Semantic Web Conference -ISWC 2006)
• RuleML 2006 (Second International Conference on Rules and Rule Markup Languages for the Semantic Web)
• SWAP 2006 (3nd Italian Semantic Web Workshop: SEMANTIC WEB APPLICATIONS AND PERSPECTIVES)

2005

• CIKM 2005 (ACM Fourteenth Conference on Information and Knowledge Management)
• ECIR 2005 (27th European Conference on Information Retrieval)
• IO 2005 (K-Cap Workshop on INTEGRATING ONTOLOGIES, collocated with the Third International Conference on Knowledge Capture -KCAP 2005)
• WILF 2005 (International Workshop on Fuzzy Logic and Applications)

2004

• ECIR 2004 (26th European Conference on Information Retrieval)

2003

• ECIR 2003 (25th European Conference on Information Retrieval)

2000

• DL 2000 (International Workshop on Description Logics)

Reviewer for Journals

• ACM Transactions on Information Systems (ACM Press)
• Artificial Intelligence Journal (Elsevier)
• Annals of Pure and Applied Logic (Elsevier)
• Computers and Mathematics with Applications (Elsevier)
• Computing and Informatics (formerly: Computers and Artificial Intelligence)
• Data & Knowledge Engineering (Elsevier)
• Engineering Applications of Artificial Intelligence (Elsevier)
• Fundamenta Informaticae (IOS Press)
• Fuzzy Sets and Systems (Elsevier)
• IEEE Transactions on Fuzzy Systems (IEEE Computer Society Press)
• IEEE Transactions on Knowledge and Data Engineering (IEEE Computer Society Press)
• IEEE Transactions on Systems, Man, and Cybernetics, Part A: Systems and Humans (IEEE Computer Society Press)
• Information Fusion (Elsevier)
• Information Processing and Management (Elsevier)
• Information Science (Elsevier)
• Information Systems (Elsevier)
• Integrated Computer-Aided Engineering (IOS Press)
• Intelligent Systems (IEEE)
• International Journal On Advances in Intelligent Systems (IARIA Journals)
• International Journal Computer Standards \& Interfaces (Elsevier)
• International Journal of Approximate Reasoning (Elsevier)
• International Journal on Digital Libraries (Springer Verlag)
• International Journal of Semantic Web and Information Systems (IGI-Global)
• International Journal of Uncertainty, Fuzziness, and Knowledge Based Systems (World Scientific)
• Journal of Applied Logic (Elsevier)
• Journal of Applied Non-Classical Logics ({\'E}ditions Herm{\`e}s-Lavoisier)
• Journal of Artificial Intelligence Research (Morgan Kaufman)
• Journal of Automated Reasoning (Springer Verlag)
• Journal of Computer Science and Technology (Science Press)
• Journal of the Franklin Institute (Elsevier)
• Journal of Intelligent Information Systems (Kluwer Academic Publishers)
• Journal of Multiple-Valued Logic and Soft Computing (Old City Publishing)
• Journal on Web Semantics (Elsevier)
• Knowledge Engineering Review Journal (Cambridge University Press)
• Logical Methods in Computer Science (ISSN: 1860-5974)
• Multimedia Tools and Applications (Springer Verlag)
• The Computer Journal (Oxford University Press)
• Theoretical Computer Science (Elsevier)
• Theory and Practice of Logic Programming (Cambridge University Press)

Dagstuhl Seminar

• Logic and Probability for Scene Interpretation