General Chair and Organizer

1. General co-chair, Third ACM SIGSPATIAL Workshop on Location-Based Social Networks, Chicago, IL, USA, November 2011.
2. General co-chair, Seventh International Conference on Semantics, Knowledge and Grid, Beijing, China, October 2011.
3. Co-organizer, Symposium on Biodiversity in the Silicon Age, Royal Danish Academy of Sciences and Letters, Copenhagen, Denmark, May 2011.
4. Co-organizer, First IEEE PerCom Workshop on Pervasive Communities and Service Clouds, Seattle, WA, USA, March 2011.
5. General co-chair, Sixth International Conference on Semantics, Knowledge, and Grid, Ningbo, China, October 2010
6. General co-chair, with Sanjay Madria, Eleventh International Conference on Mobile Data Management, Kansas City, MO, USA, May 2010.
7. General co-chair, with Yanlei Diao, Sixth International Workshop on Data Management for Sensor Networks, Lyon, France, August 2009.
8. Organizer, Data Always and Everywhere—Management of Mobile, Ubiquitous, Pervasive, and Sensor Data, Dagstuhl Seminar Number 05421, Schloss Dagstuhl, Germany, October 2005 (with Gustavo Alonso, Bernhard Mitschang, and Oddvar Risnes).
9. Organizer, First Chorochronos Intensive Workshop, Aalborg, June 1998 (with Michael Böhlen, Dieter Pfoser, and Nectaria Tryfona).
10. Organizer, Tenth National Danish Database Workshop, Aalborg, June 1998 (with Janne Skyt).
11. General chair and steering committee member (co-members include A. Segev (chair), J. Clifford (PC chair), T. Özsu, B. Pernici, N. Pissinou, and R. T. Snodgrass), International Workshop on Temporal Databases, Zurich, Switzerland, September 1995. This is the first workshop ever to be held in cooperation with the VLDB Endowment, Inc. As general chair, I handled potential conflict-of-interest papers.