1. Aerospace Engineering & Engineering Mechanics, Iowa State University, Ames, IA 50011, USA
2. Aerospace Engineering, University of Maryland, College Park, MD 20742, USA
3. Clark Associates, Adelphi, MD 20783, USA
4. Naval Surface Warfare Center, Carderock Division, W. Bethesda, MD 20817, USA
5. DOE Ames Laboratory, Ames, IA 50011, USA