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중소형 회로 차단기에 적용 가능한 한류 메커니즘의 개발
이제덕,박종식,임재국,박동희,박민호,최계광,김세환,윤재웅,이춘규,Lee, Je-Duk,Park, Jong-Sik,Im, Jae-Guk,Park, Dong-Hee,Park, Min-Ho,Choi, Kye-Kwang,Kim, Sei-Hwan,Yun, Jae-Woong,Lee, Chun-Kyu 한국금형공학회 2016 한국금형공학회지 Vol.10 No.1
Electrical equipment in factories, buildings, etc. with the development of the industry has become a large capacity. By the development, electric load also become diversified and there is also highly functional requirements being electrical equipment. Particularly in the small and medium-sized circuit breakers, tend to preferentially consider the economy stands out and improvements in safety, ease of mounting and connection through the modularity of the basic dimensions compact and cost to block expansion of the scope of the development of capacity, etc. The product having a competitive has been strongly required. In order to implement the circuit breakers of breaking capacity and compact at the same time taking into account the economic development of this technology applied to the current-limiting mechanism is essential budget or the current limiting mechanism is currently available mechanisms applicable to small and medium-sized frame (frame) can not do it. In this paper, at the same time satisfying the economic efficiency, by minimizing the load force of the moving contactor (moving contactor) to be applied to small and medium frame other hand to secure the economical efficiency without using high speed contact parting acceleration of the moving contactor conventional current-limiting mechanism, and to develop a current-limiting mechanism that can be satisfied with the same or higher performance to meet the needs of the market.
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김형식,안득수,김대곤,신경덕,이제경 대한소화기학회 1999 대한소화기학회지 Vol.34 No.2
Background/Aims: We determined whether the portal hypertension in patients with esophageal varices would be changed hemodynamically after endoscopic injection sclerotherapy (EIS). Present study was performed to find out hemodynamic change of portal hypertension, the occurrence of new gastric varix and the disappearance of previous gastric varix after EIS. Methods: The doppler sonographic parameters including cross sectional area, velocity of flow, blood flow volume, and congestion index were used to measure the portal hemodynamic change between before and after EIS in 22 patients. Additionally, gastrofiberscopic examination was performed to determine the effects of EIS on gastric varix formation before and a year after EIS. Results: Four parameters of doppler ultrasound were not significantly changed between before and after EIS, while the blood flow volume increased. One cases (67%) revealed newly formed gastric varix, but 3 out of 7 cases (43%, p=0.022) in which the early endoscopic examination identified the presence of gastric varix showed a decrease of it. Conclusions: In patients with esophageal varices, hemodynamics was not significantly changed after EIS. Moreover, gastric varix was not aggravated and even disappeared after EIS. Thus, EIS is supposed to be a positive therapeutic modality for treating esophageal varix.
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