About the Authors

Steven H. Collins

stevecollins@cmu.edu

Affiliation Department of Mechanical Engineering and Robotics Institute, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America

Arthur D. Kuo

Affiliation Departments of Mechanical Engineering and Biomechanical Engineering, University of Michigan, Ann Arbor, Michigan, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ADK. Performed the experiments: ADK. Analyzed the data: SHC ADK. Wrote the manuscript: SHC ADK.