1. Member, ASCE
2. Sr. Res., Inst. for Sys. Anal., Russian Acad. of Sciences, Moscow, Russia.
3. Assoc. Prof., Dept. of Mech. Engrg., Univ. of Southern California, Los Angeles, CA.
4. Prof., Aeronautical and Astronautical Engrg. Dept., Univ. of Illinois, Urbana, Ill 61801-2935.
5. Assoc. Prof., Dept. of Mech. Engrg., Wayne State Univ., Detroit, MI.