1. Assistant Professor, Dept. of Civil Environmental Engineering, Carleton Univ., 1125 Colonel By Dr., Ottawa ON, Canada K1S 5B6. E-mail: heng_khoo@carleton.ca
2. Professor Emeritus, Dept. of Civil and Environmental Engineering, Univ. of Alberta, Edmonton AB, Canada T6G 2W2. E-mail: terry.hrudey@ualberta.ca
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Alberta, Edmonton AB, Canada T6G 2W2. E-mail: roger.cheng@ualberta.ca