1. Doctoral Student, Dept. of Mechanical and Aerospace Engineering, Univ. of Alabama in Huntsville, Huntsville, AL 35899.
2. Professor of Mechanical Engineering; Dept. of Mechanical and Aerospace Engineering, Univ. of Alabama in Huntsville, Huntsville, AL 35899 (corresponding author).
3. Professor of Civil Engineering, Dept. of Civil and Environmental Engineering, Univ. of Alabama in Huntsville, Huntsville, AL 35899.
4. President, Soems, Inc., 10 Canterbury Lane, Watchung, NJ 07069.
5. Research Engineer, Propulsion Research Center, Univ. of Alabama in Huntsville, Huntsville, AL 35899.