1. Assistant Professor, Dept. of Civil and Environmental Engineering, Seoul National Univ., 1 Gwanak-ro, Gwanak-ku, Seoul 151-744, Korea; formerly, Lecturer, School of Civil Engineering and Built Environment, Science and Engineering Faculty, Queensland Univ. of Technology, Brisbane, QLD 4001, Australia (corresponding author).
2. Assistant Professor, Dept. of Architectural Engineering, Univ. of Seoul, Seoul 130-743, Korea.
3. Assistant Professor, Dept. of Architectural Engineering, Dong-Eui Univ., Busan 614-714, Korea; formerly, Postdoctoral Research Fellow, Dept. of Civil, Architectural, and Environmental Engineering, Univ. of Texas, Austin, TX 78712.