1. Schlumberger, 1310 Rankin Road, Houston, TX 77073 e-mail:
2. Department of Mechanical and
Industrial Engineering, College of Engineering, The University of Iowa, Iowa City, IA 52242 e-mail:
3. Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269 e-mail:
4. US Army RDECOM/TARDEC, Warren, MI 48397-5000 e-mail: