1. Assistant Professor, Dept. of Civil Engineering, Univ. of Arkansas, 4190 Bell Engineering Center, Fayetteville, AR 72701 (corresponding author).
2. Associate Professor, Dept. of Civil, Architectural, and Environmental Engineering, Univ. of Texas at Austin, 301 E. Dean Keeton St., Austin, TX 78712.
3. Professor, Dept. of Civil and Environmental Engineering, Virginia Tech, 200 Patton Hall, Blacksburg, VA 24061.
4. Senior Lecturer, Dept. of Civil and Environmental Engineering, Univ. of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
5. Professor, Dept. of Civil and Natural Resources Engineering, Univ. of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand.