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한동기(Dong-gi Han),송명현(Myung-hyun Song),박규남(Kyu-nam Park),이태훈(Tae-hun Lee) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
본 논문에서는 유도전동기의 고정자권선 고장진단을 목적으로 이상적인 전동기의 전류신호와 실시간으로 운전하고 있는 전동기 전류신호를 Park’s Vector에 각각 적용시켜 Park's Vector 패턴을 만들고 패턴 피크값의 기준치와 측정치의 편차를 이용하여 오차치를 벗어날 때 고장으로 진단하는 Park's Vector 패턴의 피크값을 이용한 고정자권선의 고장진단을 시도하였다. 숙달된 작업자가 Park’s Vector패턴을 보고 고장을 분석해야 했던 방법과는 달리 패턴을 비교하지 않고도 자동으로 고장을 진단하고 정보해주는 진단 방법을 제시하였다. 실제 전류분석 및 진단을 위해 상용 프로그램인 LabVIEW를 이용하였다.
곽영태,한동기,이신영,Gwak, Yeong-Tae,Han, Dong-Gi,Lee, Sin-Yeong 대한흉부심장혈관외과학회 1992 Journal of Chest Surgery (J Chest Surg) Vol.25 No.7
To prevent recurrence of spontaneous pneumothorax, 23 patients were operated through median sternotomy for simultaneous resection of bilateral bullae, And 27 patients with spontaneous pneumothorax were treated with unilateral thoracotomy, We studied the number, duration and sites of recurrence including findings of CT scan, as well as comparing the both operated group. The incidence of spontaneous pneumothorax was 88% in patients with the ages between 16 to 35 Forty one patients[82%] were operated with the indication of recurrent pne-umpthorax. The number of pneumothorax attack was 2.34 per patient with recurrent pneumothorax. The 87.8% of recurrence was occured within 6 months from last attack. Ips-ilateral recurrnet pneumothorax was 56.1% and contallateral involve was 43.9%. The bilaterality of visible bullae was 90.9% in the findings of chest CT scan and 91.3% in the operative finding. The sensitivity and accuracy for bulla detection with chest CT were 92.6%, respectively. Exclude one case of complicated median sternotomy infection, the postoperative hospital stay was shorter in median sternotomy approached group[P<0.05]. In conclusion, the bullous lesions of the lung have tendency of bilaterality so that median sternotomy for simultaneous resection of bilateral bullae should be considered in patients with contralateral visible bullae with chest CT.
전예지,한동기,곽영태,Jeon, Ye-Ji,Han, Dong-Gi,Gwak, Yeong-Tae 대한흉부심장혈관외과학회 1991 Journal of Chest Surgery (J Chest Surg) Vol.24 No.2
Authors recently experienced a case of traumatic pulmonary pseudocyst in 4 year-old girl. Traumatic pulmonary cyst is a rare complication of blunt thoracic trauma, simulating surgical conditions such as lung abscess, localized empyema, or congenital bronchogenic cyst. Unless infection is supervened, surgery is not indicated because of its spontaneous regression. In this article, authors present the case and review the traumatic pulmonary pseudocyst with related articles.