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전중함(Chun, Jung-Ham),이상화(Lee, Sang-Hwa),권오수(Kwon, Oh-Soo) 한국화재소방학회 2008 한국화재소방학회 학술대회 논문집 Vol.2008 No.춘계
Emergency lantern is an escape equipment of fire fighting. This equipment of obligation installation in buildings. But, We cast doubt on this equipment's reliability. Therefor we have need to study of this equipment's reliability. This paper research general emergency lantern for up grade reliability. For connection to fire alarm system, alarm for get lost general emergency lantern, and pilot lamp for interruption of electric power, and charge to rechargeable battery in general emergency lantern from fire alarm system. Then view very good result in reliability.
전중함(Chun, Jung-Ham),박종탁(Park, Jong-Tack),김일중(Kim, Il-Jung) 한국화재소방학회 2012 한국화재소방학회 학술대회 논문집 Vol.2012 No.춘계
This study restoration worker for dispersion relay in R-Type fire alarm system. Restoration worker very good instrument for an fire system inspector. When inspector check for fire system someone need reset for fir system to normal state. This chain of action is frequent and troublesome. In this case, If we can automatic reset for fire system it's restoration worker. This paper settlement on the problem for reset fire system. Design, make grabber for restoration worker. The test offer proof possibility restoration worker.
태양광 발전을 위한 대용량 소프트 스위칭 승강압 DC/DC 컨버터
김영철(Kim Young-Cheal),김재준(Kim Jae-Joon),이종근(Lee Jong-Kuen),전중함(Chun Jung-Ham),곽동걸(Kwak Dong-Kurl),이현우(Lee Hyun-woo) 전력전자학회 1996 전력전자학술대회 논문집 Vol.1996 No.-
Power conversion system must be increased switching frequency in order to achieve a small size, a light weight and a low noise. However, the switches of converter are subjected to high switching power losses and switching stresses. As a result of those, the power system brings on a low efficiency. In this paper, the authors propose a DC-DC boost converter of high power by partial resonant switch method (PRSM). The switching devices in a proposed circuit are operated with soft switching and the control technique of those is simplified for switch to drive in constant duty cycle. The partial resonant circuit makes use of a inductor using step up and a condenser of loss-less snubber. Also the circuit has a merit which is taken to increase of efficiency, as it makes to a regeneration at input source of accumulated energy in snubber condenser without loss of snubber in conventional circuit The result is that the switching loss is very low and the efficiency of system is high. The proposed converter is deemed the most suitable for high power applications where the power switching devices are used.
원저 : 비만 여성의 복부지방 분포에 영향을 주는 요인
김양현 ( Yang Hyun Kim ),오상우 ( Sang Woo Ou ),김영성 ( Young Sung Kim ),전중한 ( Jung Han Chun ),양윤준 ( Yoon John Yang ),윤영숙 ( Yeong Sook Yoon ),이언숙 ( Eon Sook Lee ) 대한비만학회 2005 The Korean journal of obesity Vol.14 No.1
연구배경: 복부비만은 2형 당뇨병과 고지혈증, 고혈압, 관상동맥질환 등의 심혈관계 질환의 주요 위험인자이며 특히 내장형 복부 비만인 경우 위험도가 더 크다고 알려져 있다. 복부지방 중 피하지방과 내장지방의 분포가 이러한 질병에 미치는 영향이 달라 이와 관련된 단순비만지표 및 체력요인과의 상관성, 그리고 복부지방 분포에 영향을 주는 요인들에 대해 알아보고자 이 연구를 시행하였다. 방법: 2001년 1월부터 2001년 12월까지 일개 대학병원 비만 클리닉을 Background: Abdominal obesity, especially, visceral obesity is thought to be a risk factor of type 2 diabetes and cardiovascular disease such as hypertension, hyperlipidemia, coronary artery disease. Based on previous studies visceral fat accumulation is