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이병국,맹광호,이광묵 최신의학사 1975 最新醫學 Vol.18 No.2
An Environmental and santiary survey was carried out on 585 houses and 36 wells in Gunseo Area, Okcheon-Gun, Choongbook Province. As a survey on sanitary environments of houses, number of rooms they were using, artificial lightening method, house heating method and sanitary measures in the kitchen were checked. Sanitary environments of drinking water sources were also investigated. Other tested items with water samples were hardness, pH, and chloride ion, and the results were summarized as follows: 1. 38.1 % of all subjected households were using 2 rooms and 29.4%, 3 rooms. 97.0% of all households were lightening their houses with oil lantern and those who were using elec tric lights were 1.7%. Those who were using coal briquett for their house heating were 12 households (2.0%). 7.4% of all households did not have any cupboard in their kitchens and those who were using dry wiping cloth were only 30.3% among all subjected housholds. 2. Main drinking water source was well (78.3%) and the pump was next (15.0%). 33.3% of all drinking water sources were beeing used by more than 6 househods. 96.1% of all drinking sourees (except pumps) were not covered and the drainage was bad in 30.0% of all drinking sources. 3. 47.0% of all households were disposing sewage unsanitarily and most of the rubbishes (93.2%) were beeing used for a compost. 4. 1% of the households were throw them away around their houses. Excrements were beeing used for fertilizer among 97.9% of all households. 4. The average hardness of 36 sampled well water was 188 ppm and the hardness of 7 samples(19.5 %) were over 300 ppm. 5. The average pH of 36 well surveyed were 6.48. Two samples were below 5.5 and 4 were over 7.1. 6. The average chloride ion of all samples were 75.2 ppm. The chloide ion of 4 samples were over 150 pPm, the international standard for drinking water.
이병국,류현호,허탁,민용일,이형연,정경운 대한응급의학회 2010 大韓應急醫學會誌 Vol.21 No.4
Fenazaquin (4-[[4 (1,1-dimethylethyl) pheynyl]ethoxy]quinazoline)is an insecticide that inhibits NADH ubiquinone oxidoreductase of the mitochondria, which is also known as complex I. An 83 year old female was brought to our emergency department (ED) having been found collapsed and unconscious at home by her family. She had ingested up to 100 ml from a bottle of 20% fenazaquin solution. In the ED,she showed severe persistent lactic acidosis despite a seemingly stable hemodynamic condition. Despite intensive supportive management, including positive pressure ventilation,packed red cell transfusion, hemodialysis, and intravenous N-acetylcysteine administration, the lactic acidosis did not respond. To our knowledge, this is the first report of fenazaquin poisoning in humans. No antidote for fenazaquin is known. In this case report, we discuss clinical characteristics and possible pathophysiologic mechanism of fenazaquin poisoning with a literature review.
가변게인 회전자 자속관측기에 근거한 스핀들 유도전동기의 센서리스 속도제어
이병국,유재성,신수철,이원철,박상훈,원충연 전력전자학회 2006 전력전자학회 논문지 Vol.11 No.5
This paper presents a new speed sensorless vector control scheme of Spindle Induction Motors(SIM) which can be successfully applied to at any speed including even zero speed. The proposed sensorless vector control of SIM uses rotor flux estimator with a variable bandwidth. This approach is based on the Closed-Loop Rotor Flux Observer(CLRFO) which includes a variable bandwidth of the PI controller. For low speed operation, the bandwidth of CLRFO has a variable bandwidth structure according to the estimated rotor velocity. The experimental results show the satisfactory operation of the proposed sensorless algorithm. 본 논문은 가변게인 회전자 자속관측기를 이용하여 전동기의 영 속도를 포함하는 전 속도대역에서 우수한 성능을 갖는 스핀들 유도전동기의 센서리스 벡터제어기법을 제안하였다. 제안한 유도전동기의 센서리스 속도제어를 위한 고피나스 모델 자속관측기는 전동기의 저속영역에서 추정속도에 따른 가변구조 PI이득을 사용한다. 실험 결과는 제안한 센서리스 알고리즘의 만족스러운 운전 결과를 보여준다.