1. Research Professor, Dept. of Architectural Engineering, Chung-Ang Univ., Seoul 156-756, Republic of Korea.
2. Dept. of Architectural Engineering, Graduate School, Chung-Ang Univ., Seoul 156-756, Republic of Korea.
3. Professor, School of Architecture and Building Science, Chung-Ang Univ., Seoul 156-756, Republic of Korea (corresponding author). ORCID: .