1. Senior Research Engineer, Building Research Inst., 1-Tachihara, Tsukuba, Ibaraki 305-0802, Japan.
2. Research Engineer, Research Center, ANDO Corp., 1-19-61, Chuou, Ohimachi, Iruma-gun, Saitama 356-0058, Japan.
3. Chief Research Engineer, Technical Research Inst., Kajima Corp., 2-19-1, Tobitakyu, Chofu, Tokyo 182-0036, Japan.
4. Professor, Dai-Ichi Univ., College of Technology, 1-10-2, Chuo-ku, Kokubu, Kagoshima 899-4395, Japan.