1. University of Illinois at Urbana-Champaign,Department of Mechanical Science and Engineering,Urbana,IL,USA
2. UC San Diego,Department of Bioengineering,La Jolla,CA,USA
3. University of Illinois at Urbana-Champaign,Department of Physics,Urbana,IL,USA
4. University of Illinois at Urbana-Champaign,Department of Computer Science,Urbana,IL,USA
5. University of Illinois at Urbana-Champaign,Department of Electrical and Computer Engineering,Urbana,IL,USA
6. University of Illinois at Urbana-Champaign,Department of Kinesiology and Community Health,Urbana,IL,USA