1. Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho Inage-ku, Chiba 263-8522, Japan
2. Department of Architecture, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
3. Department of Environmental Engineering and Architecture, Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8601, Japan
4. Civil Engineering Program, Faculty of Engineering, University of the Ryukyus, Okinawa 903-0213, Japan
5. Department of Architecture, Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima 739-8527, Japan
6. Division of Human Environmental Systems, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan