1. Assoc. Prof. of Civ. Engrg., and Assoc. Member of Center for Advanced Study, Univ. of Illinois, Urbana, Ill.
2. Postdoctoral Fellow, Institut fuer Massivbau, Technische Hochschule, Hannover, Germany, formerly Research Assoc. in Civ. Engrg., Univ. of Illinois, Urbana, Ill.