1. Mechanical EngineeringUniversity of California Berkeley Berkeley, CA USA 94704 E-mail:E-mail
2. Research Laboratory of ElectronicsMassachusetts Institute of Technology Cambridge, MA USA 02139
3. Mechanical Engineering DepartmentUniversity of Massachusetts, Dartmouth, MA USA 02747
4. Aviation and Missile ResearchDevelopment, and Engineering Center, US Army Redstone Arsenal, AL USA 35898