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제어기 무장착 운송대를 위한 선형운동 자기부상 운송시스템
손영욱,박기환,Son, Yeong-Uk,Park, Gi-Hwan 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.12
In this work, a magnetic levitation (maglev) system is developed to transport a wafer between semiconductor fabrication process modules in clean rooms to take advantages of eliminating particle and oil contamination that normally exist in conventional transport systems due to contact motion of mechanical components. A main feature of the maglev system developed in this work is that a controller and power supplying part are not mounted on the moving carrier but on the stationary track, which is defined a controller-free carrier, to reduce carrier's weight. Iron-core electromagnets and irons are used for levitation, and air-core electromagnets and permanent magnets are used for stabilization. Analysis, design, and modeling of the magnetically levitated transport system are presented. The performance of the maglev system is experimentally demonstrated.
04 포스터 발표 : 환경 화학 분야(PC) ; PC-04 : 미나리와 들깻잎 중 살균제 Boscalid의 잔류특성 비교
전상오 ( Sang Oh Jeon ),황정인 ( Jeong In Hwang ),이상협 ( Sang Hyeob Lee ),경기성 ( Kee Sung Kyung ),김태화 ( Tae Hwa Kim ),권찬혁 ( Chan Hyeok Kwon ),손영욱 ( Yeong Uk Son ),김동술 ( Dong Sool Kim ),김장억 ( Jang Eok Kim ) 한국환경농학회 2015 한국환경농학회 학술대회집 Vol.2015 No.-
Different growth type of crops is one of major factors determining residual patterns of pesticides in them. In this study, residual characteristics of boscalid in water dropworts (WD) and perilla leaves (PL) which are different in leaf size were investigated. Commercial boscalid (49.3%, WP) was sprayed 2 or 3 times at interval of a week prior to harvest, and crop samples were collected at both final application and harvest days. Residual amounts of boscalid in the WD and PL were analyzed using GC-ECD, and recovery rates of boscalid spiked with 0.1 and 0.5 mg/kg on the WD and PL ranged from 91.8 to 111.0%. Initial residual amounts of boscalid were 20.3-44.5 mg/kg in WD and 101.6-138.7 mg/kg in PL. These results show that initial amounts of boscalid deposited on PL may be 4 folds larger than those in WD, when assuming that weights of the WD and PL are same. At the harvest day, residual amounts of boscalid in WD and PL decreased by 35.6% (13.0-28.9 mg/kg) and 21.1% (88.2-98.6 mg/kg), respectively, of the initial residual amounts. Pesticides applied on PL, which has wide leaves, may have larger residual amount and longer persistency than those on WD.