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Immunoglobulin G4-Related Disease of the Ovary Mimicking Bilateral Ovarian Malignancies
심용식,정택,정대철,김현수,오영택 대한영상의학회 2020 대한영상의학회지 Vol.81 No.4
Immunoglobulin G4-related disease (IgG4-RD) is a fibro-inflammatory condition characterized by several pathological features that can theoretically involve all organs. Ovarian involvement in IgG4-RD has been reported by two studies only. Herein, we report a pathologically confirmed case of ovarian involvement of IgG4-RD, which mimicked bilateral ovarian malignancies on computed tomography and magnetic resonance imaging.
그라프 연성 고정환자에서 유연성(Flexibility)과 그라프 불안정 정도(Graf`s Instability Degrees, GID)
심용식,황병연 대한척추외과학회 1995 대한척추외과학회지 Vol.2 No.2
Study Design : To assess the changes of the flexibilities and Graf's instability degrees(GID) after Graf soft stabilization on the instability of the low back disorders, revies the dynamic films before and after low back operation. And compare flexibilities and GID with clinical results(JOA Scores, etc). Object : To determine whether GID has a clinical significance or not. These results should explain what kinds of patterns of segmental motions are developed in the course of the new adaptation, new dynamic stabilization, after the operation. Methods : In the patients who treated their back problems with Graf system as a stabilization procedure, 15 patients(instabiliy 7, spondylolysis 4, spondylolisthesis 4) were selected. they have more biomechanical problems than neurological problems, and passed over I years after the operation. Check the flexibilities & GID with computer assisting system and make a comparative studies with JOA scores & patient's self evaluation scores before and after the operation. Results : In the flexibility degrees, instability, spondylolysis and spondylolisthesis show decreased flexibility, but increased JOA scores. In the GID, instability and spondylolysis show increased GID after the operation. These findings suggest the segmental displacementIangulation and translation) was developed in the course of the new adaptation. But spondylolisthesis show decreased GID in the course of the dynamic stabilization. Conclusion : As a indicator of Graf system application and criteria of the prognosis after the operation. GID has not a clinical significance, but has a geometric advantages. Decreased flexibility is the one of the possible factors which improve the clinical symptoms, but it need multi-center clinical and biomechanical studies.
열병합발전용 Dual Fuel Engine의 질소산화물 배출저감에 관한 연구
정일래,김용술,심용식 서울산업대학교 산업대학원 1992 大學院論文集 Vol.1 No.1
This study shows the correlation between ?? emission in the exhaust gas and various operation factors of dual fuel engine for Co-generation system. General tendency was shown that the thermal efficiency was lowered by the change of operation factors. However these were not confirmed on this experiment. Increasing T4 temperature (exhaust gas temperature at turbo-charger inlet)reduces ?? emission rate. The higher T4 temperature requires lower excess air as the excess air ratio is controlled by T4 temperature on gas mode operation. Another tendency was that ?? emission rate is reduced in case of increasing boost air temperature, quantity of pilot oil bypassing flue gas through the through the exhaust gas boiler. The diameter of the fuel injection nozzle was changed smaller than design value and the injection timing was readjusted. Thus ?? enission rate could be reduced as retarding injection timing and changing hole diameter of fuel injection nozzle, however maxium engine out-put was decreased by changing fuel nozzle on the diesel mode operation.
정일래,심용식 서울産業大學校 1994 논문집 Vol.39 No.1
This study involves air quality dispersion predictions and comparison of the predicted values with actually measured data in terms of TSP, SO₂,and NO₂concentration in north Seoul area. The prediction was made by utilizing CDM-2.0 air quality simulation computer model. It predicts long term air pollutant concentration in urban area. The TSP concentrations observed ware high at the MI-A dong, SSANG-MUN ㅜ dong and NO-WON station. The SO₂was high at BANG-HAK dong and NO-WON station, NO₂was high at DO-BONG station, although the lower concentration were observed at the WOO-IE dong, BUN dong and SUYURI for itms. The correlation coefficient of CDM-2.0 were TSP 0.4665, SO₂0.6202 and NO₂0.6421. In conclusion CDM-2.0 demonstrates more suitable to SO₂, NO₂than prediction TSP in subject area.
Pattern Search법을 이용한 강의실 조명 향상
심용식(Yong-Sik Shim),최홍규(Hong-Kyoo Choi),박승원(Seung-Won Park),서범관(Beom-Gwan Seo),임명환(Myung-Hwan Lim),신혜영(Hye-Young Shin) 한국조명·전기설비학회 2008 한국조명·전기설비학회 학술대회논문집 Vol.2008 No.10월
강의실은 학생들이 학습을 하는 공간으로 정확한 정보취득과 시작업을 요한다. 강의실의 조명환경에 대한 문제점은 학습효과의 저하뿐만 아니라 학생들의 시력에도 악영향을 미치게 된다. 따라서 학생들이 대부분의 시간을 보내는 강의실의 알맞은 조명을 얻기 위한 연구가 필요하다. 현재의 대학 강의실의 일반조명시스템과 다운라이트를 적용한 조명시스템을 컴퓨터 시뮬레이션을 통하여 비교, 검토해보면 다운라이트를 적용한 조명 시스템은 강의실의 조도를 개선하며, 등기구 초기 투자 비용의 절감으로 경제성을 향상시키고 에너지 절약을 가져올 수 있다. Lecture room, for student to study, need to get exactly information and show up what students are required. So, problems for illuminated environments are low effect of studying, and that students may get weak-sighted. Research is required to get enough lighting for lecture room which students spend most their time. If we compare lighting system for recent college lecture room with computer simulation, lighting system at the lecture room with down light will be improve intensity of illumination. Therefore we can get economical benefit and save energy.
접촉전압 감소를 위한 비등간격 사선 Mesh접지에 관한 연구
심용식(Yong-Sik Shim),최홍규(Hong-Kyoo Choi),김태훈(Tae-Hoon Kim),정인혁(Jung-In Hyeok) 한국조명·전기설비학회 2011 한국조명·전기설비학회 학술대회논문집 Vol.2011 No.5월
고장 전류가 접지극을 통해 대지로 유입될 경우 대지전위상승이 발생함과 동시에 최대예상 접촉전압이 발생한다. 최대예상 접촉전압의 감소를 위해 접지 Grid의 간격, 두께, 총 도체길이, 매설깊이 등을 조절하여 저감할 수 있으나 경제적 부담이 발생하게 된다. 본 문에서는 사선 Mesh접지의 Grid 간격 조정을 통해 설계한 비등간격 사선 Mesh접지와 기존의 Mesh접지에 동일한 접지설계 제원을 적용하여 시뮬레이션 한 결과 비등간격 사선 Mesh접지의 최대예상 접촉전압이 감소하였고 부가적으로 접지저항, GPR이 감소하였다.
봉상접지극과 Mesh접지극의 매설깊이 변화에 따른 위험전압 분석에 관한 연구
심용식(Yong-Sik Shim),최홍규(Hong-Kyoo Choi) 한국조명·전기설비학회 2011 조명·전기설비학회논문지 Vol.25 No.4
Grounding electrodes with higher burial depths are evaluated to have better performance, due to the domestic practice that puts the grounding resistance as the standard of performance evaluation, while grounding resistance decreases as the burial depth increases. However, The dangerous voltage is necessary for the analysis. Because the performance evaluation of grounding electrodes should include not only grounding resistance but also the dangerous voltage(mesh voltage and step voltage). So in this paper, The dangerous voltages of mesh grounding and rod grounding were analyzed for using computer simulation and miniature grounding model.