[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[2] HRL Labs, Malibu, CA 90265 USA
[3] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA
[4] Gen Elect Aviat, Cincinnati, OH 45215 USA
[5] Univ Calif Santa Barbara, Dept Mech Engn, Santa Barbara, CA 93106 USA
[6] Univ Aberdeen, Sch Engn, Kings Coll, Aberdeen AB24 3UE, Scotland