Funding for this research was provided by:
Army Research Office (W911NF-13-1-0165)
NSF Office of the Director (HRD-1345219)
National Aeronautics and Space Administration (NNX09AV07A)
National Science Foundation (NNX09AV07A)
Article History
Received: 6 October 2015
Accepted: 28 January 2016
First Online: 9 February 2016