Professor Yasuhiko Dote, Dept. of Computer Science and Systems Engineering, Muroran Institute of Technology, 27-1 Mizumoto-Cho Muroran 050, Japan Tel: +81 143 47 3267 Fax: +81 143 47 3374 Email: dote@csse.muroran-it.ac.jp Professor Richard G. Hoft Dept of Electrical Engineering University of Missouri-Columbia Columbia MO 65211 USA