1. Associate Professor Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada e-mail:
2. Director of Advanced Technology Adjunct Assistant Professor Mem. ASME Aerotech, Inc., 101 Zeta Drive, Pittsburgh, PA 15238; Mechanical Engineering and Materials Science Department, University of Pittsburgh, Pittsburgh, PA 15238-2897 e-mail:
3. Senior Vice President Product Management, INOVA Geophysical, Stafford, TX 77477 e-mail: