1. Lecturer and Postdoctoral Research Associate, Engineering Fundamentals Division, Univ. of Tennessee, Knoxville, TN 37996; formerly, Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of Tennessee, Knoxville, TN 37996 (corresponding author).
2. Professor, Dept. of Biosystems Engineering and Soil Science, Univ. of Tennessee, Knoxville, TN 37996.
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Tennessee, Knoxville, TN 37996.
4. Research Associate, Materials Testing Institute, Univ. of Stuttgart, 70569 Stuttgart, Germany.