1. Air Force Research Laboratory, AFRL/VASD, 2210 8th Street, Wright Patterson AFB, OH 45433-7531, USA
2. Consultant, 179 Vinson Ridge Lane, Clayton, NC 27520, USA
3. Cornell University, Sibley School of Mechanical and Aerospace Engineering, Upson and Grumman Halls, Ithaca, NY 14853-7501, USA