1. U.S. Army Armament Research Development and Engineering Center, AMSRD-AAR-AEP-F(A), Adelphi, MD 20783, USA
2. Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185, USA
3. U.S. Army Research Laboratory, AMSRD-ARL-SE-EM, Adelphi, MD 20783, USA