1. Graduate School of Science and Technology, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8577, Japan
2. Department of Agricultural Engineering, University of Peradeniya, Kandy 20400, Sri Lanka
3. Department of Agricultural and Biosystem Engineering, Universitas Padjadjaran, Sumedang 45363, Indonesia
4. Institute of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8577, Japan