Workshop/conference organization
- Co-organizer of VLDB workshop on Management of Uncertain Data (MUD 2010)
- Co-organizer of VLDB workshop on Management of Uncertain Data (MUD 2009)
- Co-organizer of 2008 Dagstuhl Seminar 08421 on Uncertainty Management in Information Systems 2008
- Co-organizer of joint VLDB workshop on Management of Uncertain Data and Quality in Databases (QDBMUD 2008)
- Co-organizer of VLDB workshop on Management of Uncertain Data (MUD 2007)
- Co-editor of ICT-Zakboek, 3e druk, PBNA Polyzakboekjes, Reed Elsevier, Published in 2007
- Co-organizer of 2006 Dagstuhl Seminar on XQuery Implementation Paradigms
- Co-organizer of Twente Data Management workshop on Uncertainty in Databases (TDM 2006)
- Co-organizer Dutch-Belgian DataBase Day (DBDBD 2005)
- Co-organizer of EDBT Summerschool 2004
- Co-organizer MultimediaN/AmbientDB workshops 2003, 2004, 2005, 2007
- Assistance in organization of reviewing process of International Conference on Very Large Databases (VLDB 2001)
- Assistance in organization of reviewing process of International Conference on Extending Database Technology (EDBT 1996)
PC memberships
- VLDB 2010: International Conference on Very Large Databases (previously 2005,2001)
- ICDE 2010: International Conference on Data Engineering (previously 2009,2008,2006)
- SIGMOD 2011: International ACM SIGMOD Conference on Management of Data
- EDBT 2012: International Conference on Extending Database Technology (previously 2008,2010,2011)
- SUM 2009: International Conference on Scalable Uncertainty Management (previously 2008)
- PAKDD 2011: Pacific-Asia Conference on Knowledge Discovery and Data Mining
- SAIAW 2010: WI/IAT Workshop on Soft approaches to information access on the Web (previously 2009)
- FlexDBIST 2011: DEXA Workshop on Flexible Database and Information Systems Technology (previously 2010,2009,2008,2007,2006)
- DEXA 2009: International Conference on Data Engineering and Expert Systems (previously 2008,2007)
- ADBIS 2009: East-European Conference on Advances in Databases and Information Systems (previously 2008)
- BIRD 2008: International Conference on Bioinformatics Research and Development
- BTW 2007: GI Fachtagung Datenbanksysteme füiness, Technologie und Web
- WIDM 2006: International Workshop on Web Information and Data Management
- XIME-P 2006: International Workshop on XQuery Implementation, Experience and Perspectives
- SEA 2005: IASTED International Conference on Software Engineering and Applications
- TSC 2004: Twente Student Conference
- VLDB PhD Workshop 2003
Other research comittee memberships
- Member of IFIP Working Group 2.6 on Databases [2009-present]
- EUSFLAT Working Group SCDBMIR on Soft Computing in Database Management and Information Retrieval [2007-present]
- Scientific committee of EDBT Summerschool 2007,2009
- EDBT Association [2005-present]
- PhD defence committee of Marcello Leida, University of Milan, Italy. Defence: expected march 2009
- PhD defence committee of Philippe Michiels, University of Antwerp, Belgium. Defence: July 5, 2007
University/Faculty comittee memberships
- Committee for Scientific Information (Dutch: Commissie Wetenschappelijke Informatie, CWI) [2008-present]
