1. Department of Mechanical, Aerospace, and Biomedical Engineering, The University of Tennessee, Knoxville, Tennessee 37996, USA
2. The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
3. Department of Mathematics, Florida State University, Tallahassee, Florida 32304, USA
4. Bredesen Center for Interdisciplinary Research and Education, The University of Tennessee, Knoxville, Tennessee 37996, USA
5. Computational Sciences & Engineering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
6. Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 3783, USA
7. School of Mathematics, University of Manchester, Manchester M13 9PL, United Kingdom