1. Department of Mechanical Engineering and Materials Science, 144 Hudson Hall, Box 90300, Duke University, Durham, North Carolina 27708-0300, Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, North Carolina 27708-0303, Department of Computer Science, Duke University, Durham, North Carolina 27708-0129, Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708-0281, and Army Research Office, P.O. Box 12211, Research Triangle Park, North...