Department of Computer Science University of Arizona Gould-Simpson Bldg., Room 715 P.O. Box 210077 Tucson, AZ 85721-0077, U.S.A.Scott M. Baker
2241 W Labriego Tucson, Az 85741 Email addresses: school: bakers@cs.arizona.edu personal: smbaker@sb-software.comQuanzhong Li
Department of Computer Science University of Arizona Gould-Simpson Bldg., Room 819 P.O. Box 210077 Tucson, AZ 85721-0077, U.S.A. Email: lqz@cs.arizona.edu