1. Hill Engineering, LLC, 3035 Prospect Park, Rancho Cordova, CA, USA
2. Department of Mechanical, Aeronautical and Biomedical Engineering, University of Limerick, Limerick, Ireland
3. Helmholtz-Zentrum Berlin for Materials and Energy, Hahn Meitner Platz 1, Berlin, Germany
4. Department of Mechanical and Aerospace Engineering, University of California, One Shields Avenue, Davis, CA, USA