1. University of Science and Technology (UST), 217, Gajeong-ro, Yuseong-gu, Daejeon 34113, South Korea
2. Division of Physical Metrology, Korea Research Institute of Standards and Science (KRISS), 267 Gajeong-ro, Yuseong-gu, Daejeon 34113, South Korea
3. Center for Research and Human Resources Development, National Standardization Agency of Indonesia (BSN), Bld. 420 Komplek PUSPIPTEK, Tangerang, Selatan, Indonesia