1. Senior Project Engineer, Seismic Isolation Engineering Inc., P.O. Box 11243, Oakland, CA 94611-0243
2. Principal, Seismic Isolation Engineering Inc., P.O. Box 11243, Oakland, CA 94611-0243
3. Professor of Structural Engineering, Structural Engineering Research Center, Tokyo Institute of Technology, Nagatsuta, Midori-Ku 226-8503, Japan
4. Group Manager, Overseas Marketing & Engineering Group, Nippon Steel Corporation, 6-3 Otemachi 2-chome, Chiyoda-ku, Tokyo, Japan