1. Assistant Professor, Dept. of Civil, Architectural, and Environmental Engineering, The Univ. of Texas at Austin, 1 University Station C1752, Austin, TX 78712-0273.
2. Ph.D. Candidate, Dept. of Civil, Architectural, and Environmental Engineering, The Univ. of Texas at Austin, 1 University Station C1752, Austin, TX 78712-0273.
3. Professor, Dept. of Civil Engineering, Univ. of Waterloo, 200 University Ave. West, Waterloo ON, Canada N2L 3G1.