1. Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of Alberta, DICE Bldg., 9211 - 116 St. NW Edmonton, AB, Canada T6G 1H9.
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of Alberta, DICE Bldg., 9211 - 116 St. NW Edmonton, AB, Canada T6G 1H9.