1. Research Associate, Dept. of Civil Engineering, Box 19308, Univ. of Texas at Arlington, Arlington, TX 76019.
2. Assistant Professor, Dept. of Civil Engineering, Boise State Univ., Boise, ID 83725.
3. Institute of Geotechnical Engineering, Southeast Univ., Nanjing, Jiangsu 210096, China.
4. Distinguished Teaching Professor, Dept. of Civil Engineering, Univ. of Texas at Arlington, Arlington, TX 76019 (corresponding author).
5. Engineering Assistant, TxDOT Fort Worth District, 2501 SW Loop 820, Fort Worth, TX 76133.