1. Graduate Student, Dept. of Mechanical and Aerospace Engineering, Univ. of Florida, Gainesville, FL 32611.
2. Senior Systems Engineer, Scientific Systems Co., Inc., 500 W. Cummings Park, Woburn, MA 01801.
3. Associate Professor, Dept. of Mechanical and Aerospace Engineering, Univ. of Florida, Gainesville, FL 32611 (corresponding author).