1. Sr. Engr., Langley Engrg., P. C., 507 Mary Charlotte Dr., Charlotte, NC 28262.
2. Prof., Dept. of Civ. Engrg., Univ. of North Carolina at Charlotte, Charlotte, NC 28213.
3. Assoc. Prof., Dept. of Civ. Engrg., North Carolina State Univ., Raleigh, NC 27695-7908.