Bob Braden USC Information Sciences Institute 4676 Admiralty Way Marina del Rey, CA 90292 Phone: (310) 822-1511 EMail: Braden@ISI.EDU Lixia Zhang UCLA Computer Science Department 4531G Boelter Hall Los Angeles, CA 90095-1596 USA Phone: 310-825-2695 EMail: lixia@cs.ucla.edu Steve Berson USC Information Sciences Institute 4676 Admiralty Way Marina del Rey, CA 90292 Phone: (310) 822-1511 EMail: Berson@ISI.EDU Shai Herzog IBM T. J. Watson Research Center P.O Box 704 Yorktown Heights, NY 10598 Phone: (914) 784-6059 EMail: Herzog@WATSON.IBM.COM Sugih Jamin University of Michigan CSE/EECS 1301 Beal Ave. Ann Arbor, MI 48109-2122 Phone: (313) 763-1583 EMail: jamin@EECS.UMICH.EDU