1. Members, ASCE
2. Postdoctoral, Institut für Hydromechanik, Universität Karlsruhe, D-76128 Karlsruhe, Germany.
3. Sr. Res. Engr. and Lect., Dept. of Civ. and Envir. Engrg., Massachusetts Inst. of Technol., Room 48-325, Cambridge, MA 02139.
4. Assoc. Prof., Dept. of Civ. and Envir. Engrg., and Massachusetts Inst. of Technol., Room 48-331, Cambridge, MA 02139.