1. R&D Center, NAiEEL Technology, 6-2 Yuseongdaero 1205, Daejeon 34104, Republic of Korea
2. Department of Civil and Environmental Engineering, Colorado State University, Fort Collins, CO 80523, USA
3. School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 261 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea