1. Department of Agricultural Science, Korea National Open University, Seoul 03087, Korea
2. Protected Horticulture Research Institute, NIHHS, RDA, Haman 52054, Korea
3. Department of Electronics Engineering, Pusan National University, Busan 46241, Korea
4. Division of Future Agriculture Convergence, College of Agriculture and Life Science, Kangwon National University, Gangwon 24341, Korea