1. Assistant Professor, Texas A&M Univ., Dept. of Civil Engineering, 3136 TAMU, College Station, TX, 77843.
2. Project Analyst, Independent Project Analysis, Inc., 11150 Sunset Hills Rd. Ste. 300, Reston, VA 20190.
3. Associate Professor, Texas A&M Univ., Dept. of Civil Engineering, 3136 TAMU, College Station, TX, 77843.
4. Undergraduate Student, Operations Research and Financial Engineering Dept., Princeton Univ., Princeton, N.J. 08544.