Journals and Magazines IEEE Multimedia Editor-in-Chief, 1998-2001. Editorial Board, 1993-1997, 2002-Present. International Journal of Information and Communication Technology Education Editorial Board, 2004-Present. International Journal on Semantic Web and Information Systems Editorial Board, 2004-Present. Journal of Digital Information Management Editorial Board, 2003-Present. Multimedia Tools and Applications Editorial Board, 2002-Present. Pattern Recognition Associate Editor, 1994-Present. Future Conferences Member, Program Committee, International RIAO Conference, Pittsburgh, Pennsylvania, May 2007. Member, Program Committee, First International Conference on Digital Information Management (ICDIM 2006), Bangalore, India, December 2006. Member, Program Committee, First International Conference on Semantic and Digital Media Technologies (SAMT 2006), Athens, Greece, December 2006. Member, Program Committee, Pacific Rim Conference on Multimedia, Hangzhou, China, November 2006. Member, Program Committee, Fifth Semantic Web Conference, Athens, Georgia, November 2006. Member, Program Committee, ACM Multimedia Conference 2006, Santa Barbara, California, October 2006. Member, Program Committee, Seventeenth International Conference on Database and Expert Systems Applications (DEXA 2006), Krakow, Poland, September 2006. Program Chair, Twelfth International Conference on Distributed Multimedia Systems, Grand Canyon, Arizona, August 2006. Member, Program Committee, International Conference on e-Business, Setubal, Portugal, August 2006. Member, Program Committee, Seventh International Workshop on Multimedia Data Mining (MDM/KDD 2006), Philadelphia, Pennsylvania, August 2006. Member, Program Committee, International Conference on Signal Processing and Multimedia Applications, Setubal, Portugal, August 2006.