1. Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
2. Department of Creative IT Engineering and Future IT Innovation Lab, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
3. Energy Research Group, Research Institute of Industrial Science and Technology (RIST), Pohang 37673, Republic of Korea
4. NASA Ames Research Center, Moffett Field, Mountain View, California 94035, United States