1. Associate Member, ASCE
2. Asst. Prof., Dept. of Civ. and Envir. Engrg., Duke Univ., P.O. Box 90287, Durham, NC 27708-0287. E-mail: hpgavin@duke.edu
3. Sr. Proj. Engr., DeSimone Consulting Engineers, P.L.L.C., 20 Waterside Plaza, Level C, New York, NY 10010-2612.