1. Assistant Professor, Dept. of Civil and Environmental Engineering, Rice Univ., MS 318, 6100 Main St., Houston, TX 77005-1827. E-mail: jamie.padgett@rice.edu
2. Associate Professor and Associate Chair, School of Civil and Environmental Engineering, Georgia Institute of Technology, 790 Atlantic Dr., Atlanta, GA 30332-0355. E-mail: reginald.desroches@ce.gatech.edu