1. a International Research Institute for Climate and Society, Earth and Environmental Engineering, Columbia University , 918 S. W. Mudd Building, Mail Code 4711, 5000 W. 120th St., New York, NY, 10027, USA
2. b Department of Civil Engineering , Chonbuk National University , 664-14 1Ga Deokjin-Dong Jeonju-City, Jeonbuk, 561-756, South Korea