D.-H. Park·B.-J. Kang·K.-R. Cho·C.-S. Shin·S.-E. Cho·J.-W. Park (B ) Department of Information and Communication Engineering, Sunchon National University, Sunchon, South Korea e-mail: jwpark@sunchon.ac.kr
D.-H. Park e-mail: dhpark@sunchon.ac.kr
B.-J. Kang e-mail: Neverkbj@nate.com
K.-R. Cho e-mail: jkl@sunchon.ac.kr
C.-S. Shin e-mail: csshin@sunchon.ac.kr
S.-E. Cho e-mail: chose@sunchon.ac.kr
W.-M. Yang Department of Horticulture and Vegetation Medical, Sunchon National University, Sunchon, South Korea e-mail: ywm@sunchon.ac.kr