1. Department of Industrial Engineering, Seoul National University, 39-313, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
2. SUTD-MIT International Design Centre, Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372
3. Department of Cognitive Science, Seoul National University, 39-313, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
4. Department of Industrial Engineering and Institute for Industrial Systems Innovation, Seoul National University, 39-313, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea