1. Researcher, Protected Horticulture Research Institute, NIHHS, RDA, Haman 52054, Korea
2. Senior Researcher, Upland Mechanization Team, NIAS, RDA, Jeonju 54875, Korea
3. Senior Researcher, Protected Horticulture Research Institute, NIHHS, RDA, Jeonju 52054, Korea
4. Researcher, Division of Energy & Environmental Engineering, NIAS, RDA, Jeonju 54875, Korea