1. Associate Professor, Dept. of Architectural Engineering, Kyonggi Univ., Suwon, Kyonggi-Do, South Korea (corresponding author).
2. Graduate Student, Dept. of Architectural Engineering, Mokpo National Univ., Mokpo, Chonnam, South Korea.
3. Graduate Student, Dept. of Architectural Engineering, Kyonggi Univ., Suwon, Kyonggi-Do, South Korea.
4. Professor, Dept. of Architectural Engineering, Chonnam National Univ., Gwangju, South Korea.