1. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Univ. of Texas at San Antonio, San Antonio, TX 78249.
2. Ph.D. Student, State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu Univ. of Technology, Chengdu Shi, Sichuan Sheng 610059, China; formerly, Visiting Ph.D. Student, Dept. of Civil and Environmental Engineering, Univ. of Texas at San Antonio, San Antonio, TX 78249.
3. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Texas at San Antonio, San Antonio, TX 78249 (corresponding author).