1. Associate Professor, Dept. of Civil, Environmental, and Construction Engineering, Texas Tech Univ., P.O. Box 41023, Lubbock, TX 79409-1023 (corresponding author).
2. Ph.D. Candidate, Dept. of Civil, Environmental, and Construction Engineering, Texas Tech Univ., P.O. Box 41023, Lubbock, TX 79409-1023.
3. Assistant Professor, Dept. of Mathematics and Statistics, Texas Tech Univ., Lubbock, TX 79409-1042.