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측면보행 기울기에 따른 정지 및 보행 시 요부와 하지근 표면 stress EMG에 미치는 영향
이만기(Man Gi Lee),오민우(Min Woo Oh),김귀백(Kwi Baek Kim) 한국사회체육학회 2010 한국사회체육학회지 Vol.0 No.39
The purpose of this study was to evaluate stress on right and left muscle of erector spinae, Vastusmedialis, and lateral gastrocnemius through EMG, as such, analyzed differences of right and left side of muscle activity according to the surface area of gradient during standing and walking. The subjects for this study were 6 female students of I University. The results were as follows that gradient comparison of erector spinae, lateral gastrocnemius according to types of position in right and left side standing and working showed significance statistically, but interaction was not statistically significant between standing, working and gradient. However, Vastusmedialis according to types of position and interaction in right and left side standing and working showed significance statistically.
백만기,Baek, Man-Gi 한국전자정보통신산업진흥회 1990 電子振興 Vol.10 No.3
중소기업 정보화의 본격적인 추진과 함께 중소업계에서 가장 고통을 겪고 있는 분야는 정보화 전담인력의 부족문제이나 정부는 동 정보화사업의 추진에 따라 앞으로 5년간 약 1만명의 정보인력이 추가로 소요될 것으로 보고있다.
Comparison of electrocoagulation and chemical coagulation with fiber filters for water treatment
Young Man Cho,Gi Weon Ji,Chang Weon Kim,Ki Baek Han,Pyeong Jong Yoo 한국화학공학회 2008 Korean Journal of Chemical Engineering Vol.25 No.6
A combined electrocoagulation(EC)-fiber filter system has been presented as a new technology for water treatment. The objective of this study was to evaluate the feasibility of applying an aluminum EC-fiber filter for water treatment. We compared the water treatment efficiency of the chemical coagulation (CC)-fiber filter and EC-fiber filter. A comparison of the EC and CC processes reveals that EC significantly outperformed CC when the water to be filtered using fiber filters was pretreated with aluminum. For particle size less than 6 μm, the removal efficiency was 66%, 43% for EC and CC, respectively, and the average removal efficiency of the total organic carbon (TOC) was 50%, 65% for CC and EC. Therefore, EC reduced the amount of aluminum utilized by 25%, and the effluent turbidity improved by approximately 0.11 NTU to 0.19 NTU. Also, the average log removal value (LRV) for heterotrophic plate count (HPC) was 2.5 and 1.9 for EC and CC. respectively. Therefore, the aluminum used for EC proved to be excellent for pretreating the water to be filtered by a fiber filter.