1. Intel Labs, Building RNB-6-61, 2200 Mission College Boulevard, Santa Clara,
California 95054, United States
2. NanoCentury KAIST Institute and Graduate School of EEWS (WCU), Korea Advanced Institute of Science and Technology (KAIST), 373-1, Guseong Dong, Yuseong Gu, Daejeon 305-701, Republic of Korea