1. Professor, Disaster Prevention Research Institute, Kyoto Univ., Gokasho, Uji, Kyoto 611-0011, Japan.
2. Postdoctoral Fellow, Integrated Research Institute, Tokyo Institute of Technology, R3-12 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.
3. Associate Professor, Dept. of Architecture and Building Engineering, Kyoto Univ., Katsura, Saikyo-ku, Kyoto 615-8540, Japan.
4. Postdoctoral Fellow, Disaster Prevention Research Institute, Kyoto Univ., Gokasho, Uji, Kyoto 611-0011, Japan.