1. Department of Materials Science and Engineering University of Maryland College Park MD 20742 USA
2. Department of Mechanical Engineering University of Maryland College Park MD 20742 USA
3. Forest Products Laboratory USDA Forest Service Madison WI 53726 USA
4. Department of Electrical and Computer Engineering University of Wisconsin – Madison Madison WI 53706 USA
5. Department of Aerospace Engineering University of Maryland College Park MD 20742 USA