Affiliation: | a Department of Industrial Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, South Korea b Voronoi Diagram Research Center, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, South Korea c Corporate Technology Operations, Samsung Electronics Co., Ltd., 416 Maetan-3-dong, Yeongtong-gu, Suwon, Gyeonggi-do 443-742, South Korea |