1. Full-time Lecturer, Dept. of Architectural Engineering, Univ. of Joongbu, Kumsan, Chungnam, 312-702, South Korea.
2. Full Professor, Dept. of Architectural Engineering, Univ. of Seoul, Seoul, 130-743, South Korea.
3. Associate Professor, Dept. of Architectural Engineering, Univ. of Dongeui, Busan, 614-714, South Korea.
4. Professor, Dept. of Civil, Environmental and Architectural Engineering, Univ. of Colorado at Boulder, Boulder, CO 80309.