Human Digital Twin System for Operator Safety and Work Management. - Goo-Young Kim; Donghun Kim; Sang Do Noh; Hong Ku Han; Nam Geun Kim; Yong-Shin Kang; Seung Hyun Choi; Dong Hyun Go; Jungmin Song; Dae Yub Lee; Hyung Sun Kim (APMS (2), 2022)