1. Assistant Professor, Dept. of Civil Engineering, Univ. of Texas Rio Grande Valley, 1201 W University Dr., Edinburg, TX 78539.
2. Graduate Student, Dept. of Civil Engineering, Univ. of Texas Rio Grande Valley, 1201 W University Dr., Edinburg, TX 78539.
3. Assistant Professor, Dept. of Civil Engineering, Al Shorouk Academy, Cairo, Egypt.
4. Undergraduate Student, Dept. of Civil Engineering, Univ. of Texas Rio Grande Valley, 1201 W University Dr., Edinburg, TX 78539.