1. Graduate Student, Department of Rural Systems Engineering, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
2. Professor, Department of Rural Systems Engineering, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
3. Post-doctoral Research Associate, Department of Rural Systems Engineering, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
4. Senior Researcher, Institute for Information and Communications Technology Planning and Evaluation, Daejeon 34054, Korea