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주용선(Yongsun Ju),김영권(Youngkweon Kim),김방원(Bangwon Kim),문정오(Jeongoh Moon),이기수(Kisu Lee) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper presents the static analysis on the stress of a heavy- duty truck frame which is made up of side member anti cross member. The analysis is performed by finite element method. In order to be similar to real frame, modeled members are designed with shell elements. The static contact between the members and the rivets is considered at the joint, and the solution is compared with the simplified model without the rivet joints. The finite element code ABAQUS 6-2 is used for this analysis.
대량의 복수로 발현한 면역글로불린 M , Kappa 형의 수외성 형질세포종 1 예
주용선(Yong Sun Ju),김미경(Mee Kyung Kim),최승원(Seung Won Choi),김상위(Sang We Kim),안명주(Myung Ju Ahn),서철원(Cheol Won Suh),이규형(Kyoo Hyung Lee),이정신(Jung Shin Lee),민원기(Won Ki Min),지현숙(Hyun Sook Chi),김상희(Sang Hee Kim 대한내과학회 1993 대한내과학회지 Vol.45 No.2
Primary extramedullary plasmacytomas (E.M.P) are uncommon plasma cell neoplasms that generally occur in the submucosal tissue of the upper airway. The following illustrates a case study of a 73 year-old man with peritoneal E.M.P and subsequent ascites is described, The finding of many plasma cells in ascites and electrophoresis and immunoelectrophoresis of as- cites led to diagnosis. Similar histologic findings such as multiple myeloma and immunoblastic lymphoma were ruled out by clinical study and immunochemical studies. This malignant ascites represents the first case described caused by E.M.P.
고관절 및 습관절 수술전후의 폐색전증 발생빈도에 관한 연구
주용선(Yong Sun Ju),최승원(Seung Won Choi),김우성(Woo Sung Kim),김원동(Won Dong Kim),고윤석(Youn Suck Koh),이수호(Soo Ho Lee),조우신(Woo Shin Jo),김기용(Key Yong Kim),문대혁(Dae Hyuk Moon),류진숙(Jin Sook Ryu),이명혜(Myeong Hye Lee) 대한내과학회 1994 대한내과학회지 Vol.47 No.1
Background: Pulmonary embolism is common complication following orthopedic joint replacement procedures. The incidence of pulmonary embolism (PE) after elective hip or knee replacement has not been reported in Korean population. Methods: To find out the incidence of PE related to elective hip or knee replacement, we performed perfusion (QS) and ventilation scintigraphy (VS) preoperatively and postoperatively in 157 patients who underwent hip or knee replacement procedures, QS was performed preoperatively, and then again 7 days after surgery, VS was obtained within a day in patients with significant perfusion defects on QS using 99mTc-diethylenetriamine-pentacetic acid (DTPA) aerosol. PE was diagnosed either by pulmonary angiography, or by changing persusion pattern on sequential QS in case of high-probability scan. QS and VS were read according to PIOPED (Prospective Investigation of Pulmonary Embolism Diagnosis) criteria. Results: Among 157 preoperative studies, 5 high-and 6 intermediate-probablity scans were observed. Five patients with intermediate-probablity scan underwent pulmonary angiogrphy, and PE were confirmed in 3 patients. All 8 patients with PE (5 patients with high- probability scan and 3 confirmed patients by pulmonary angiography) were asymptomatic and showed improvement on QS after 7 days of heparin therapy. Of 146 patients, 12 patients (8.2%) showed significant changes from low-probability or normal scan to 5 high-and 7 intermediate-probability scans postoperatively, compared to preoperative QS. Among 7 patients with intermediate-probability, PE were confirmed in 4 patients by pulmonary angiography. Among 9 patients with PE, 7 patients showed improvement on QS after heparin therpy, and 1 patient did not undergo follow-up QS, and 1 patient died of hypoxic respiratory failure. In 9 patients with PE, 8 patients were asymptomatic. Conclusion: The incidence of PE following total hip or knee replacement was 6.1%(9/146). Preoperative prevalence of PE was 5.1%(8/157). Combination of preand past-operative scintigraphic imaging is a useful diagnostic modality for screening PE, because most patients are not clinically suspected.
연료전지 차량용 고압기체수소 저장용기(Type4)개발(설계검증시험)
유계형(Yoo, Gye-Hyoung),주용선(Ju, Yong-Sun),허석봉(Heo, Seok-Bong),전상진(Jeon, Sang-Jin),김종열(Kim, Jong-Lyul),이중희(Lee, Jong-Hee) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.11
We developed and tested the high pressure hydrogen gas cylinder(type4) for fuel cell vehicle. The working pressure is 350bar. We conducted material tests, production tests and design qualification tests on the developed cylinders according to modified NGV2-2000(hydrogen). The high pressure hydrogen gas cylinder met all the design qualification requirements of ANSI/CSA NGV2-2000 and acquired NGV2 certification from independent inspection agency.
한국인 류마티스 관절염 환자에서 질병 중증도 표지자로서의 HLA-DR4 유용성
임미경 ( M. K. Lim ),이창근 ( C. K. Lee ),최승원 ( S. W. Choi ),주용선 ( Y. S. Ju ),주유숙 ( Y. S. Cho ),김성문 ( S. M. Kim ),신명진 ( M. J. Shin ),오흥범 ( H. B. Oh ),유빈 ( B. Yoo ),문희범 ( H. B. Moon ) 대한류마티스학회 2001 대한류마티스학회지 Vol.8 No.1
Objective: To investigate HLA-DR4, its subtype and shared epitope as a severity marker in Korean patients with rheumatoid arthritis. Methods: One hundred thirty-six RA patients were typed for HLA DR4 and HLA-DRB1 alleles by the polymerase chain reaction-sequence specific probe method. The patients were retrospectively evaluated for extra-articular features, presence of remission, and joint failure. Bony erosion score was assessed by Sharp`s method with modification. Results: Patients with HLA-DR4 had significantly higher prevalence of extra-articular features compared to those without the allele. However, there was no association of HLA-DR4, HLA-DRB1*0405 and shared epitope with rate of remission, joint failure, and bony erosion score. Eighty-two percent of patients were rheumatoid factor positive. With seropositive patients only, the results were the same as those above. Conclusion: HLA-DR4, HLA-DRB1*0405 and shared epitope are not a severity marker in Korean patients with RA in terms of radiological score, rate of joint failure, and rate of clinical remission. Data from this study do not support the clinical use of HLA-DR4 typing as a prognostic marker in Korean patients with RA.
최승원(Seung Won Choi),고윤석(Youn Suck Koh),주용선(Yong Sun Ju),최강현(Kang Hyeon Choe),김우성(Woo Sung Kim),김재중(Jae Joong Kim),박성욱(Seong Wook Park),박승정(Seung Jung Park),이종구(Jong Koo Lee),김원동(Won Dong Kim) 대한내과학회 1994 대한내과학회지 Vol.46 No.3
Objetive: The measurement of cardiac output by CO2 rebreathing method is noninvasive procedure using indirect Fick equation. In order to compare the result of cardiac output measured by CO2 rebreathing method with that by thermodilution technique, this study was performed. Methods: Simultaneous measurement of cardiac output by CO2 rebreathing method and thermodilution technique was performed in 13 mitral stenosis patients. The subjects were 4 men and 9 women, with mean age of 41.15±11.01 year. The cardiac output (CO) can be calculated from indirect Fick equation using the CO2 rebreathing method, CO=CO2 production/CvCO2-CaCO2. The CO2 production was obtained by collecting expired gas and multiply its volume by CO2 concentration and the arterial PCO2 was estimated from the end tidal PCO2. The mixed venous PCO2 was obtained from rebreathing plateau during O2 and mixture gas breathing through rebreathing bag. Results: 1) The average cardiac output was 3.41±0.45(L/min) by CO2 rebreathing method and 3.45±0.37(L/min) by thermodilution technique. 2) The result of cardiac output measured by CO2 rebreathing method was highly correlated to that by thermodilution technique (r=0.82). 3) The equation relating two measurements was Y =-0.01±0.99X. (Y: CO2 rebreathing method, X: thermodilution technique) Conclusion: This study showed that the result of cardiac output by CO2 rebreathing method was correlated well with that by standard thermodilution technique, so it is thought that CO2 rebreathing method could provide valid estimate of cardiac output for evaluation of cardiac function. It is simple to perform, easily repeatable and essentially risk free. Therefore this method could be very useful for clinical use.