1. Media Lab, Massachusetts Institute of Technology, Cambridge, Massachusetts.
2. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts.
3. Department of Industrial Engineering, University of Padova, Padova, Italy.
4. Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, Massachusetts.
5. Department of Material Science and Engineering Glass Lab, Massachusetts Institute of Technology, Cambridge, Massachusetts.
6. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania.