1. Doctor of Engineering, Sr. Manager, Nippon Steel Corp., 6-3 Otemachi 2-chome, Chiyoda-ku, Tokyo 100-8071, Japan.
2. Manager, Nippon Steel Corp., 6-3 Otemachi 2-chome, Chiyoda-ku, Tokyo 100-8071, Japan.
3. Director of Engineering, Sr. Researcher, Building Research Institute, Ministry of Construction, 1, Tachihara, Tsukuba, Ibaraki 305, Japan.
4. Director of Engineering, Center for Better Living, 2, Tachihara, Tsukuba, Ibaraki 305, Japan.