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외란의 작용 하에서 흡기계의 능동소음제어 성능향상을 위한 알고리즘의 개발
전기원(Ki-won Jeon),조용구(Yong-Goo Joe),오재응(Jae-eung Oh),이정윤(Jung-yoon Lee) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently Intake noise has been extensively studied to reduce the engine noise. In order to diminish intake noise several resonators were added to the intake system. However this can cause a reduction of engine output power and an increase of fuel consumption. In this study, active noise control simulation of the Filtered-x LMS algorithm is applied real instrumentation intake noise data under rapid acceleration because intake noise is more excessively increased under the such a harsh condition. But the FXLMS algorithm has poor control performance when the system is disturbed. Thus modified FXLMS algorithm using L-point running average filter is developed to improve the control performance under the rapid acceleration and disturbance. The noise reduction quantity of modified Filtered-x LMS algorithm is more than original one in two cases. In the case of control for real instrumentation intake noise data, the modified FXLMS algorithm shows excellent control performance but FXLMS algorithm can not control.
양측성 고형질화 음영을 보인 무중상의 기관지-관련 림프양 조직의 저등급 B-세포 원발성 폐 림프종 1례
김양기 ( Yang Ki Kim ),김철 ( Chul Kim ),전진 ( Jin Jeon ),전기원 ( Ki Won Jeon ),김동원 ( Dong Won Kim ),이동화 ( Dong Wha Lee ),홍대식 ( Dae Sik Hong ),박희숙 ( Hee Sook Park ),어수택 ( Soo Taek Uh ),김용훈 ( Yong Hoon Kim ),박 대한결핵 및 호흡기학회 1998 Tuberculosis and Respiratory Diseases Vol.45 No.5
이철우,박규호,강문수,양동호,고봉민,배성한,전기원,박관석,정인섭,홍세용,오종용,오홍석,김명수 대한내과학회 1998 대한내과학회지 Vol.55 No.5
Objectives: Pyrethroids are commonly used pesticides, and acute human poisoning by these insecticides is common in Korea It has a high affinity to the sodium channel on cell membranes causing blockage, which results in neurotoxicity, hyperexcitation, and death. The purpose of this study was to analyze the clinical characteristics of acute pyrethroid poisoning. Methods: To evaluate the clinical characteristics (age, sex, causative agents, cause of ingestion, severity of poisoning and its clinical feature, prognosis, complication and results of the treatment), we analyzed the clinical reports of 30 patients with pyrethroid poisoning who were admitted to Soonchunhyang Chunan hospital from January 1992 to July 1997. Results: 1) 18 out of 30 patients with pyrethroid poisoning were male and the largest age group was above 60 years old. 2) The most common cause of ingestion was suicide, in 24 cases(80%). 3) There were 7 classes of causative agents of poisoning and all of these were classified into 2 grades according to the degree of WHO toxicity. Fenvlaerate and cypermethrin were the most common agents. 4) The degree of severity was classified into three groups-mild, moderate and life-threatened. Of these groups, mild poisoning was the most common. There was no significant difference in the age, type of pyrethoid and interval between pyrethroid ingestion and arriving at the emergency room between the three groups. However, the amount of ingestion was significantly higher in the life-threatened group, 5) The most common symptom of the patients was vomiting, in 19 patients, The classification were of three types (5 type I, 11 type II and 1 intermediate type) according to clinical characteristics. 6) There is no specific antidote, therefore therapy is generally supportive. There were three deaths, and the cause of death was respiratory failure. 7) The most common complication was pneumonia, in 3 cases(10%), which occurred in almost all patients in the life-threatened group. Conclusions: The most common age group of poisoning was over 60 years old, and suicide was the most common cause of ingestion. Treatment is supportive, and most causal exposures require only decontamination. There were three deaths, and the cause of death was respiratory failure in each case. The most common complication was pneumonia.
김철,김용훈,강문수,어수택,김양기,봉종대,전기원,기신영 대한알레르기학회 1998 천식 및 알레르기 Vol.18 No.4
Exercise-induced anaphylaxis can be associated with ingestion of a specific food. We experienced a case of exercise-induced anaphylaxis followed by ingestion of parsely. A 22-year old female patient was presented with angioedema of the face and chest tightness induced by running after ingestion of parsley within 15 minutes. She had suffered from allergic rhinitis. She had positive reactions to mugwort pollen and parsely extract on skin prick test in a dose dependent manner. Although the oral provocation test with parsely could not induce bronchoconstriction, we could diagnosed as parsely dependent exercise induced anaphylaxis based upon skin prick test and history.