1. Assistant Professor of Civil Engineering, Arkansas State Univ., P.O. Box 1740, Lab Science West No. 239, State University, AR 72467 (corresponding author).
2. David Ross Boyd Professor and Aaron Alexander Professor of Civil Engineering, and Alumni Chair Professor of Petroleum Engineering, 202 W. Boyd St., Room No. 334, Univ. of Oklahoma, Norman, OK 73019.
3. Assistant Professor of Aerospace and Mechanical Engineering, Asp Ave., Felgar Hall, 212, Univ. of Oklahoma, Norman, OK 73019.
4. Associate Professor of Mechanical Engineering, 865 Asp Ave., Felgar Hall, 212, Univ. of Oklahoma, Norman, OK 73019.