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金炯遠,睦榮珪,黃龍燮,柳建一,郭鎭榮 최신의학사 1971 最新醫學 Vol.14 No.12
The Wilkie's syndrome is an unusual form of duodenal obstruction due to compression of the distal duodenum between the aorta and the superior mesenteric artery. Authors report one case of duodenal obstruction due to superior mesenteric syndrome (Wilkie's syndrome) in 16-years old male student. A well development under nourished thin 16-years old male was admitted with abrupt onset of colicky abdominal pain and intermittent vomiting for two days, who no specific past, history except postprandial fullness. The diagnosis of Wilkie's syndrome was made under radiologic findings and above chief complaints. The operative treatment was performed by side to side anastomosis of- the jejunum to the dilated duodenum. We report a case of Wilkie's syndrome with brief review of several literature.
이상용(S.Y. Lee),강병희(B.H. Kang),채영민(Y.M. Chae),목형수(H.S. Mok),초규하(G.H. Choe),김덕근(D.K. Kim),류재성(J.S. Ryu) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
A brushless DC motor has the high quality of torque output and silence, has been more widely used in industrial area. As the driver and controller of BLDC motor have been more complicated and precise, simulation method has been much used m motor design. And the output characteristics of BLDC motor is determined by the waveform of BACK-EMF in instinct. But because the conventional model of BLDC motor is obtained by approximation of real nonlinear waveform to ideal trapezoidal waveform, the error is occurred in slmulation result. Thus in this paper, for the correction of this error in simulation, the model of real nonlinear waveform considered is proposed, and the simulation result is obtained in case of three-phase, four-poles Y-connected, surface mounted permanent magnet BLDC motor.
스폿용접기의 용접품질 향상을 위한 동저항 데이터 베이스 구축
조승진,김재문,원충연,최규하,목형수,김규식 성균관대학교 1998 학술회의지원논문목록집 Vol.1998 No.-
A dynamic electrical parameter monitoring device was designed to simultaneously record the instantaneous value of voltage, current, power, and resistance during spot welding. The data obtained using this technique have been analyzed in term of the relationships of these parameters to the phenomena occuring during the formation(surface break-down nugget formation and mechanical collapse) of spot weld. Finally, a database implementation is undertaken to develop techniques for improving weld quality of the resistance spot welder.
배진선,설지영,목우균,이영 대한혈관외과학회 1989 Vascular Specialist International Vol.5 No.1
Chylorrhea develops by various causes of (1) congenital anomalies such as atresia of the thoracic duct, (2) trauma, (3) neoplasms, (4) infections, and (5) thrombosis of left subclavian and jugular vein, or superior vena cava,' among which trauma and neoplasms are most frequent. Thoracic duct injury appears as chylothorax, chyloma, or chylorrhea. Trauma in thoracic duct is caused by (1) blunt trauma, (2) penetrating injury, (3) cervical, thoracic or abdominal operation, and (4) various diagnostic procedures such as subclavian vein catheterization, left heart catheterization, or translumbar arteriography. Trauma in thoracic duct be managed, at first, by conservative measures such as NPO & TPN, change to medium-chain for long-chain triglyceride, compression dressing on wound, effective thoracotomy tube drainage or pleurodesis with sclerosing agent in chylothorax. Should leakge of chyle not be controlled despite conservative measures, operative intervention be undertaken. Among operative precedures, right supradiaphragmatic ligation of thoracic duct between azygos vein and aorta is most popular. In many occasions, direct repair of injured thoracic duct is difficult because of difficulty in finding the site and friability of thoracic duct wall. When massive leakage of chyle continues, mortality is high because of metabolic, nutritional and immunological disorders. Authors have experienced one case of the thoracic duct injury due to continuous negative pressure suction with Hemovac through operation site after left radical cervical lymphoareolar dissection because of extensive, conglomerated tuberculous lymphadenitisfrom left upper deep cervical throughout left subclavicular region despite one year's antituberculous therapy, and treated successfully by primary suture with 6-0 prolene. As very rare cause of thoracic duct injury, contiuous negative pressure suction through operation site seems to be the first report, being not found in the literatures as far as we looked for.
이동훈,장성록,목연수,전경원 한국산업안전학회 1993 한국안전학회지 Vol.8 No.3
Automation and mechanization of work make people put the machine into operation and watch the state of operations. In the process of those works, they are apt to have accidents caused by their carelessness. To reduce such accidents, we can practise TOUCH and CALL, which is to indicate and ascertain the dangerous parts at every process before performing works. The objectives of this study are to show quantitatively the efficiency of TOUCH & CALL and to examine the effects of S-R compatibility. The results show that reaction time is longer(0.138-0.279sec.) in case of indicating with fingers and shouting than that of responding only visually. On the other hand, the error rate decreases by 3. 3 times -7times. From this, it is considered to verify quantitative estimation on multiple feedback of TOUCH & CALL.
팔라듐 담지 촉매를 이용한 HCFC - 142 b 수소첨가분해반응
이경훈,서경원,목영일,박건유,안병성 한국공업화학회 1999 응용화학 Vol.3 No.1
In this study, hydrodechlorination of 1-chloro-1,1-difluoroethane (HCFC-l42b) has been performed over palladium on activated carbon catalysts. Activated carbon was, prior to catalysts preparation, washed with sodium hydroxide and hydrofluoric acid and/or hydrochloric acid to remove the impurities. In this experiment effects of the H₂ reduction time and mloe ratio of H₂ to HCFC-l42b on catalyst activities were investigated. The results showed that the conversion of HCFC-l42b products were more than 20% and the selectivities to 1,1-difluoroethane(HFC-l52a) in the product gas was 90% and especially, when mole ratio was 4, conversion was 31.5%, and selectivity to the HFC-l52a was 95.5%, whereas ethane was very low.
Y.-M.Chae,J.-Y.Gu,J.-S.Gho,H.-S.Mok,G.-H.Choe,C.-Y.Won,G.-S. Kim 전력전자학회 1998 ICPE(ISPE)논문집 Vol.- No.-
According to the adoption of inverter circuit topology for welding machine area, the improvement of welding performance can be achieved However conventional CO2 inverter arc welding machine uses the constant voltage characteristics So the metal transfer is performed under unoptimum condition in the sence of spatter generation<br/> In this paper the new control algorithm is proposed for welding machine, which is the instantaneous output current control method using single chip microprocessor But the optimum waveform of welding current is still uncertain, as a first step for figuring out the optimised waveforms, this study was performed And as a result of performance test of the proposed system, it was demonstrated that all of the waveform variation parameter could be set individually and the generated spatter is reduced compared to conventional inverter arc welding machine.<br/>