1. a Materials Research and Strategic Technologies , Motorola Austin, Texas, 78721, U.S.A.
2. c Plastic and Trim Products Division , Ford Motor Co. , Redford, MI, 48239, U.S.A.
3. d MRST, Motorola , Mesa, AZ, 85201, U.S.A.
4. b Dept. of Physics , Auburn University , Auburn, Alabama, 36849, U.S.A.