Professional Activities
Conferences
  1. 20th International World Wide Web Conference (WWW-2011), 2012. PC member.
  2. ACM International Conference on Management of Data (SIGMOD), 2012. PC member.
  3. IEEE International Conference on Data Engineering (ICDE'12), 2012. PC Chair.
  4. past activities: 1992-2010
Journals
  1. IEEE Transactions on Knowledge and Data Engineering, Editor-in-Chief, 2009-2012
  2. Distributed and Parallel Databases, Springer. Editor, 2008-.
  3. IEEE Transactions on Knowledge and Data Engineering, Editor, 2003-2007
  4. VLDB Journal, Springer Verlag, Editor, 2002-2007
  5. International Journal of Geographical Information Systems (Taylor&Francis). Editor, 1995-2005
  6. Geoinformatica (Kluwer Academics). Editor, 1997--2005
Trustee
  1. VLDB Endowment, Trustee board member. 2006-2013. Secretary: 2010-2013.
Others
  1. SIGMOD Jim Gray Best Thesis Award committee, co-Chair, 2008-2011. (Committee member. 2005-2008)
  2. Evaluator for promotion/new hire cases for various Universities in Hongkong, Taiwan, US, Canada
  3. Evaluator for Grant Proposals for various overseas funding agencies