AAAI & IAAI Conference Program Committees Conference Chairs Workshop Chair and Cochair David Leake, Indiana University Marie desJardins, SRI International AAAI-99 Program Cochairs Jim Hendler, University of Maryland & DARPA/ISO Devika Subramanian, Rice University AAAI-99 Senior Program Committee AAAI-99 Associate Program Cochairs Henry Kautz, AT&T Labs –Research Bruce Porter, University of Texas, Austin Craig Boutilier, University of British Columbia James Crawford, i2 Technologies Ken Forbus, Northwestern University Lee Giles, NEC Research Institute Russell Greiner, University of Alberta Julia Hirschberg, AT&T Labs –Research Leslie Kaelbling, Brown University Henry Kautz, AT&T Labs Daphne Koller, Stanford University Kurt Konolige, SRI International David McAllester, AT&T Labs –Research Vibhu Mittal, Just Research & Carnegie Mellon University Leora Morgenstern, IBM T.J. Watson Research Center Pandurang Nayak, RIACS/NASA Ames Research Center Gregory Piatetsky-Shapiro, Knowledge Stream Partners Bruce Porter, University of Texas Lee Spector, Hampshire College Lynn Andrea Stein, Massachusetts Institute of Technology Ron Sun, NEC Research Institute and University of Alabama Milind Tambe, University of Southern California Sebastian Thrun, Carnegie Mellon University Manuela Veloso, Carnegie Mellon University Daniel Weld, University of Washington AAAI-99 Assistant Program Chair Vibhu Mittal, Just Research & Carnegie Mellon University IAAI-99 Chair Ramasamy Uthurusamy, General Motors Research IAAI-99 Cochair Barbara Hayes-Roth, Extempo Systems, Inc. Intelligent Systems Demonstrations Chair George Ferguson, University of Rochester Mobile Robot Competition and Exhibition Chair Alan C. Schultz, Naval Research Lab Robot Contest Subchair Lisa Meeden, Swarthmore College Robot Exhibit Subchairs Karen Zita Haigh, Honeywell Technology Center Marc Böhlen, Carnegie Mellon University Robot Challenge Subchair Tucker Balch, Carnegie Mellon University Robot Building Laboratory Chair David Miller, KISS Institute for Practical Robotics AAAI-99 Program Committee SIGART/AAAI-99 Doctoral Consortium Chair Janyce Wiebe, New Mexico State University Fahiem Bacchus, University of Waterloo Tucker Balch, Carnegie Mellon University Chitta Baral, University of Texas at El Paso Rachel Ben-Eliyahu-Zohary, Ben-Gurion University Hamid Berenji, IIS Corp/NASA Ames Research Center Gautam Biswas, Stanford University Avrim Blum, Carnegie Mellon University Mark Boddy, Honeywell Technology Center Daniel Borrajo, Universidad Carlos III de Madrid Ronen Brafman, Ben-Gurion University Eric Brill, Johns Hopkins University Carla Brodley, Purdue University Student Abstract and Poster Chair Sven Koenig, Georgia Institute of Technology Student Volunteer Coordinator Thomas Haynes, Wichita State University Tutorial Chair Bart Selman, Cornell University xvii Wolfram Burgard, University of Bonn Marco Cadoli, Universitá di Roma Jennifer Chu-Carroll, Lucent Technologies Bell Labs Dan Clancy, NASA Ames Research Center Christian Darken, Siemens Corporate Research Adnan Darwiche, Rockwell Science Center Ernie Davis, New York University Johan de Kleer, Xerox PARC Kenneth DeJong, George Mason University Pedro Domingos, Instituto Superior Tecnico Denise Draper, Harlequin, Inc. Oskar Dressler Didier Dubois, IRIT-CNRS, Toulouse Gregory Dudek, McGill University Charles Elkan, Harvard University Matt Evett, Florida Atlantic University Adam Farquhar, Schlumberger Tom Fawcett, Bell Atlantic Science and Technology Claude Fennema, Mount Holyoke College Dieter Fox, Carnegie Mellon University Nir Friedman, Hebrew University of Jerusalem Hector Geffner, Universidad Simon Bolivar Bob Givan, Purdue University Keith Golden, NASA Ames Research Center Robert Goldman, Honeywell Technology Center Marco Gori, Universita di Siena Benjamin Grosof, IBM T.J. Watson Research Center Andrew Haas, State University of New York, Albany Peter Haddawy, University of Wisconsin, Milwaukee Karen Haigh, Honeywell Technology Center Milos Hauskrecht, Brown University Robert Holte, University of Ottawa Vasant Honavar, Iowa State University Ian Horswill, Northwestern University Adele Howe, Colorado State University Charles Isbell, AT&T Labs –Research Tommi Jaakkola, Massachusetts Institute of Technology David Jensen, University of Massachusetts, Amherst Froudald Kabanza, Universite de Sherbrooke Hiroaki Kitano, Sony Computer Science Laboratory Kenneth Koedinger, Carnegie Mellon University David Kortenkamp, Metrica Inc. Deepak Kumar, Bryn Mawr College Nicholas Kushmerick, University College Dublin John Lafferty, Carnegie Mellon University Yann LeCun, AT&T Labs - Research Alon Levy, University of Washington Diane Litman, AT&T Labs –Research Michael Littman, Duke University Ron Loui, Washington University Maja Mataric, University of Southern California Sheila McIlraith, Stanford University Lisa Meeden, Swarthmore College Christopher Meek, Microsoft Research Nicolas Meuleau, Brown University Risto Miikkulainen, The University of Texas at Austin Hector Munoz-Avila, University of Maryland Robin Murphy, University of South Florida Tom Murray, University of Massachusetts and Hampshire College, Amherst Nicola Muscettola, RECOM Technologies/NASA Ames Research Center Dana Nau, University of Maryland David Page, University of Louisville Andrew Parkes, University of Oregon Ronald Parr, Stanford University Mark Peot, Rockwell Science Center and Duke University Avi Pfeffer, Stanford University Rosalind Picard, Massachusetts Institute of Technology David Poole, University of British Columbia Greg Provan, Rockwell Science Center Foster Provost, Bell Atlantic Science and Technology Tuomas Sandholm, Washington University Jonathan Schaeffer, University of Alberta Torsten Schaub, University of Potsdam Hinrich Schuetze, Xerox Corporation Alan Schultz, Naval Research Laboratory Dale Schuurmans, University of Waterloo Bart Selman, Cornell University Sandip Sen, University of Tulsa Moninder Singh, IBM Thomas J. Watson Research Center David E. Smith, NASA Ames Research Center Stephen Smith, Carnegie Mellon University Reinhard Stolle, Stanford University Dan Suthers, University of Hawaii Rich Sutton, AT&T Labs–Research Katia Sycara, Carnegie Mellon University Rich Thomason, University of Michigan Peter van Beek, University of Alberta Pascal Van Hentenryck, Université Catholique de Louvain K. Vijay-Shanker, University of Delaware Darrell Whitley, Colorado State University Mary-Anne Williams, Newcastle University M. J. Wooldridge, Queen Mary & Westfield College Ronald Yager, Iona College Nevin Zhang, Hong Kong University of Science & Technology Shlomo Zilberstein, University of Massachusetts Jan Zytkow, UNC Charlotte 1999 Auxiliary Reviewers Steven Abney Srinivas Bangalore Chumki Basu Yngvi Bjornsson Sviatoslav Brainov Bob Carpenter Jennifer Casper Anna Helena Reali Costa Goksel Dedeoglu Frank Dellaert Thuong Doan Oskar Dressler Mark Flick Lenny Foner Jeremy Frank xviii Marc Friedman Aaron Gage Christopher Geib Brian Gerkey Dani Goldberg Vu Ha Eric Hansen Andreas Herzig Haym Hirsh Rune Jensen Andreas Junghanns John Langford Stan Matwin Kathleen McCoy Laurent Michel Tom Minka Abdel-Illah Mouaddib Todd Neller Hien Nguyen Monica Nicolescu Rachel Pottinger Owen Rambow Marie-Christine Rousset Nicholas Roy Erik Selberg Eyal Solomon Shimony Amit Singhal Ellen Spertus Deborah Strahman Will Uther Thomas Wagner Barry Werger IAAI-99 Program Committee Bruce G. Buchanan, University of Pittsburgh Robert S. Engelmore, Stanford University Barbara Hayes-Roth, Extempo Systems Inc. Philip Klahr, TriVida Corporation Alain Rappaport Charles Rosenberg, Carnegie Mellon University Ted Senator, National Association of Securities Dealers Howard E. Shrobe, Massachusetts Institute of Technology Reid Smith, Schlumberger Limited Ramasamy Uthurusamy, General Motors Research Marilyn Walker, AT&T Labs–Research xix