1. Architecture Program, Graduate School of Advanced Science and Engineering, Hiroshima University, Kagamiyama 1-4-1, Higashihiroshima 739-8527, Japan
2. Division of Civil Engineering and Architecture, Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan
3. Architecture Program, Department of Science and Technology, Faculty of Science and Technology, Oita University, Dannoharu 700, Oita 870-1192, Japan