Selected Professional Activities

Editorial Service

• Associate Editor, Artificial Intelligence Journal (AIJ)
• Editorial Board Journal of Artificial Intelligence Research (JAIR) (2003-2005)

Program Co-Chair

• CommonSense 2005 The Seventh International Symposium on Logical Formalizations of Commonsense Reasoning, Corfu, Greece, May 2005 (with Pavlos Peppas and Michael Thielscher).
• ISWC2004 Third International Semantic Web Conference, Hiroshima, Japan, November 2004 (with Dimitris Plexousakis).
• ESSW2002 E-Services and the Semantic Web Workshop, Toronto, Canada, May 2002 (with Rick Hull).
• CogRob2002 The Second International Workshop on Cognitive Robotics, Toulouse, France, April 2002 (with Chitta Baral)
• DX'2001 The Twelfth International Workshop on Principles of Diagnosis, Italy, March 2001 (with Daniele Theseider Dupre and Luca Console).
• 1999 AAAI Spring Symposium -- Hybrid Systems and AI: Modeling, Analysis and Control of Discrete + Continuous Systems, Stanford, USA, March 1999 (with Gautam Biswas).

Organizing Committees

• KR2004: Workshops Chair, Ninth International Conference on the Principles of Knowledge Representation and Reasoning.
• KR2004: Doctoral Consortium Chair.
• ISWC: Workshops Chair, Second International Semantic Web Conference.
• Workshop Organizing Committees: AAAI-2005 Workshop on Exploiting Planning and Scheduling for Web Services, Grid and Automatic Computing; WWW-2005 Workshop on Web Services on web Service Semantics: Towards Dynamic Business Integration; ICAPS-2004 Workshop on Planning and Scheduling for Web and Grid Services.

Program Committees

• AAAI: American National Conference on Artificial Intelligence (1994, 1998, 1999, 2000, 2002, 2005, 2006(S))
• WWW: International World Wide Web Conference (2002, 2004, 2005, 2006)
• ISWC: International Semantic Web Conference (2002, 2005)
• IJCAI: International Joint Conference on Artificial Intelligence (2005, 2007)
• CogRob: International Cognitive Robotics Workshop (2004)
• KR: International Conference on Principles of Knowledge Representation and Reasoning (2002, 2006)
• HSCC'02: Hybrid Sysetms: Computation and Control (2002)
• DX: International Workshop on Principles of Diagnosis (1993, 1994, 1997, 1998, 2001)
• Common Sense 2001: Fifth Symposium on Logical Formalizations of Commonsense Reasoning (2001)
• SWWS'01: Semantic Web Workshop (2001)
• AAAI Spring Symposium on Answer Set Programming (2001)
• NMR: International Workshop on Nonmonotonic Reasoning (2000)
• DX/QR: Joint International Workshop on Principles of Diagnosis and Qualitative Reasoning (1999)