1. Postdoctoral Research Fellow, Dept. of Civil & Environmental Engineering, Yonsei Univ., Seoul 120-749, Republic of Korea.
2. Graduate Research Assistant, Dept. of Civil & Environmental Engineering, Yonsei Univ., Seoul 120-749, Republic of Korea.
3. Director, Regional Development Division, Provincial Government of Jeollabuk-do, Jeonju, Jeollabuk-do, 560-761, Republic of Korea.
4. Associate Professor, Dept. of Civil & Environmental Engineering, Yonsei Univ., Seoul 120-749, Republic of Korea (corresponding author).