1. Graduate student, Dept. of Sustainable Architectural Engineering, Hanyang Univ., 17, Haengdang-dong, Sungdong-ku, Seoul 133-791, Korea.
2. Ph.D. Candidate, Dept. of Sustainable Architectural Engineering, Hanyang Univ., 17, Haengdang-dong, Sungdong-ku, Seoul 133-791, Korea.
3. Associate professor, Dept. of Architectural Engineering, Hanyang Univ., 17, Haengdang-dong, Sungdong-ku, Seoul 133-791, Korea (corresponding author).
4. Professor, Dept. of Sustainable Architectural Engineering, Hanyang Univ., 17, Haengdang-dong, Sungdong-ku, Seoul 133-791, Korea.