■Affiliation
   Ph.D. Candidate
   Imura Laboratory, Systems and Control Course, School of Engineering,    Tokyo Institute of Technology, Japan.
   Fellow of Japan Society for the Promotion of Science

■Contact
   〒W8-1, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
   Tel: 03-5734-2646
   Email: urata_at_cyb.sc.e.titech.ac.jp