1. Postdoctoral Fellow, Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Utah State Univ., 4110 Old Main Hill, Logan, UT 84322 (corresponding author).
2. Assitant Professor, Dept. of Civil and Environmental Engineering, Utah State Univ., 4110 Old Main Hill, Logan, UT 84322.
3. Assistant Professor, Dept. of Mathematics and Statistics, Utah State Univ., 3900 Old Main Hill, Logan, UT 84322.