1. Ph.D. Candidate, School of Civil Engineering and Environmental Science, Univ. of Oklahoma, 202 W. Boyd St., CEC 334, Norman, OK 73019 (corresponding author).
2. David Ross Boyd Professor and Aaron Alexander Professor of Civil Engineering and Professor of Petroleum and Geological Engineering, Univ. of Oklahoma, 202 W. Boyd St., CEC 107, Norman, OK 73019.
3. Ph.D. Student, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 N. Mathews Ave., Urbana, IL 61801.
4. Assistant Professor, Dept. of Civil Engineering, Indian Institute of Technology, Bombay 400076, India.