1. Grad. Res. Asst., Dept. of Engrg. Sci. and Mech., Virginia Tech, Blacksburg, VA 24061.
2. Res. Sci., Dept. of Engrg. Sci. and Mech., Virginia Tech, Blacksburg, VA.
3. Asst. Prof., Dept. of Engrg. Sci. and Mech., Virginia Tech, Blacksburg, VA.
4. Assoc. Prof., Dept. of Civ. and Envir. Engrg., Virginia Tech, Blacksburg, VA.
5. Struct. Engr., Strongwell Corp., 400 Commonwealth Ave., Bristol, TN 24203.