1. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Utah, 110 South Central Campus Drive, Ste. 2038, Salt Lake City, UT 84112 (corresponding author).
2. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 1211 NCEL, MC-250, 205 North Mathews Ave., Urbana, IL 61801.