1. Jinhyo Joseph Yun, Department of IoT and Robotics Convergence, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Sang-Ri, Hyeonpung-Myeon, Dalseong-Gun, Daegu, Korea.
2. Kyungbae Park (corresponding author), Department of Business Administration, Sangji University, Wonju, Kangwon-Do, Korea.
3. Janghyun Kim, Sungkyunkwan University, Sungkyunkwan-Ro, Jongno-Gu, Seoul, Korea.
4. Jeongho Yang, Department of IoT and Robotics Convergence, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Sang-Ri, Hyeonpung-Myeon, Dalseong-Gun, Daegu, Korea.