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문승환,최병규,황문호,Mun Seung-Hwan,Choe Byeong-Gyu,Hwang Mun-Ho 한국국방경영분석학회 1991 한국국방경영분석학회지 Vol.17 No.2
The fire effectiveness and the operationability of the ground weapon system (such as tank, armored vehicle, howitzer, MLRS, ${\cdots}$), whose operations are usually happened on the ground, are dependent not only on their performances but also on the terrain environments. Especially, the artillery weapons systems' effectiveness is largely varied, because their maneuverability (such as translation, occupation of their sites) and the fire effectiveness are very dependent on the terrain. In this paper, presented are the methods how to analyze the terrain using the digital terrain data. And a software (which are implemented on the IBM PC compatible personal computer) is developed for the analysis of the terrain using the various method of computer Aided Geometric Design and Modeling. The S/W is expected to be very useful for the evaluation of the artillery weapon systems and for the commanders' decision making.
도전성 카본블랙/PVdF 복합재의 제조 및 전기적 특성
김명찬 ( Kim Myeong Chan ),문승환 ( Mun Seung Hwan ),임재석 ( Im Jae Seog ),함현식 ( Ham Hyeon Sig ),박홍수 ( Park Hong Su ),김명수 ( Kim Myeong Su ) 한국유화학회 2003 한국응용과학기술학회지 Vol.20 No.3
N/A Electrical properties of carbon filler/PVdF {poly(vinylidene fluoride)}composite were investigated as a funtion of carbon filler/PVdF ratio in the range of 0.2~0.5. Three kinds of comercialzied conductive carbon blacks such as Hiblack 41Y, KE300J, and KE600J, and carbon nanofibers prepared by the catalytic chemical vapor deposition of C_(2)H_(4) over Ni-Cu catalysts were in the range of 0.65 to 13.5 S/cm depending the fillers` electrical conductivity ranging from 5.6 to 23.1 S/cm. Among the carbon fillers used, the KE600J carbon black showed the highest conductivity both in the composite and filler itself because of its high degree of graphitization due to the high-temperature thermal treatment and its high surface area due to the activation treatment.
선박 건조에서 소조립 자동 용접 지원을 위한 설계 용접선과 작업 구조물 매핑 방법
김형진(Hyung-Jin Kim),이주현(Ju-Hyun Lee),남미희(Mi-Hee Nam),문승환(Seung-Hwan Mun),권기연(Ki-Youn Kwon) (사)한국CDE학회 2022 한국CDE학회 논문집 Vol.27 No.4
The welding process is the most time and cost consuming process and the quality of welding is also an important issue in shipbuilding. In order to improve these problems, welding automation robots are widely used. For welding automation, it is necessary to make the welding line of the design data into the robot coordinate system so that the robot can work. In this study, we propose a method to generate welding paths using a lightweight model and a point cloud. Welding lines are extracted using the lightweight model already built for digital collaboration in shipyards. And the work targets are recognized using the point cloud data obtained from the depth camera. Through the grid construction, noise is removed from the measured data, and stiffeners and boundary data are generated. Weld lines are mapped to work targets using ICP (iterative closest point). This proposed method has been tested on several real models to demonstrate the feasibility.
류마티스 관절염 환자에서 빈뇨로 발현된 방광의 유전분증 2예
이창재 ( Chang Jae Lee ),최세웅 ( Se Woong Choi ),문승환 ( Seung Hwan Mun ),허정훈 ( Jung Hoon Huh ),김경태 ( Kyoung Tae Kim ),원종진 ( Jong Jin Won ),안원석 ( Won Suk An ),윤성국 ( Sung Kuk Yun ),홍숙희 ( Sook Hee Hong ),이성원 ( 대한류마티스학회 2004 대한류마티스학회지 Vol.11 No.3
Secondary amyloidosis is characterized by accumulation of an amorphous proteinous material in the various tissue and organs with infectious disease or inflammatory disease. Symptoms of the amyloidosis are variable according to the involved organs. Reactive amyloidosis of bladder in rheumatoid arthritis (RA) is a rare condition with hematuria in the most cases. However, we report two cases of patients with RA, who have frequency due to secondary amyloidosis of bladder without hematuria. Therefore secondary amyloidosis of urinary bladder should be considered as a possible cause of frequency in patients with long-term RA.
결핵성 흉막염에서 Soluble Interleukin-2R, Interleukin-6 및 Adenosine Deaminase의 변화에 관한 연구
김종혁 ( Kim Jong Hyeog ),정복현 ( Jeong Bog Hyeon ),문승환 ( Mun Seung Hwan ),조호준 ( Jo Ho Jun ),이명구 ( Lee Myeong Gu ),현인규 ( Hyeon In Gyu ),정기석 ( Jeong Gi Seog ),남송현 ( Nam Song Hyeon ),류지소 ( Lyu Ji So ),조현찬 ( 대한내과학회 1993 대한내과학회지 Vol.44 No.2
흉막 질환을 진단하고 그 기전을 이해하는데 각종 면역학적 지표들이 이용되어 왔으며 특히 결핵성 흉막염은 T 임파구가 활성화도이 조력 T 임파구가 증가하고 sIL-2R, ADA 및 interferon gamma 등이 증가한다고 알려져 있다. 저자들은 이들 T 임파구의 산물인 sIL-2R, IL-6, ADA 등이 흉막질환의 감별 진단에 도움이 되는지를 살펴 보고 서로간의 상관관계를 조사하여 다음과 같은 결론을 얻었다. 1) 흉막액에서 sIL-2R 치는 결핵성에서 877±430pmol/L로 결핵성에서 증가되어 있었다. 2) 흉막액에서 IL-6 치는 결핵성에서 25,593±17,352pg/ml, 악성에서 5,800±3,485pg/ml로 유의한 차이를 보였고 농흉에서 74,080±48,569pg/ml로 가장 높게 나타났다. 3) 결핵성 흉막액내의 sIL-2R 치와 ADA 치는 서로 유의한 상관관계를 보이며 증가되어 있었다(r=0.5623, p=0.001). 4) 결핵성 흉막액의 sIL-2R 치는 IL-6가 증가함에 따라 상승하는 경향을 보였다. 이상의 결과로 흉막염에서 결핵과 악성 종양의 감별은 ADA, sIL-2R 및 IL-6 모두가 의미있는 지표들로 사료되며 결핵성에서 sIL-2R와 ADA 간의 유의한 상관관계가 있고 sIL-2R와 IL-6 간에도 동반상승의 경향을 보여 T 임파구에서 형성되는 이들 지표들이 결핵성 흉막 삼출액내에서 서로 연관성이 있음을 시사하였다. Background: The aim of this study is to evaluate the value of interleukin-6 (IL-6), Soluble interleukin-2 receptor (sIL-2R) and adenosine deaminase in diagnosing tuberculos pleurisy and in differentiating it from malignant pleural effusion, and to find out mutual relationships between the three parameters. Methods: We investigated the level of IL-6, sIL-2R and ADA in various pleural diseases. Included were 77 subjects with pleural effusion (57 bopsy proven tuberculous pleurisy, 9 malignant pleural effusion, 5 empyema, 4 parapneumonic effusion, 1 paragonimiasis and 1 pancreatitis). IL-6 was measured by Quantikine human IL-6 (R&D systems), sIL-2R by h-interleukin-2-receotor ELISA (Boehringer Manheim biochemica) and ADA by Giusti`s colorimetric method. Results: The level of IL-6 was significantly higher in tuberculous effusion (25,593±17,352 pg/ml) than that of malignant effusion (5,800±3,485 pg/ml, p < 0.001). IL-6 was also increased in empyema fluids (74,080±48, 569 pg/ml). The level of sIL-2R was significantly higher in tuberculous effuson (877±430 pmol/l) than that of 20 nontuberculous effusion (259±230 pmol/L, p<0.001). The level of ADA was also higher in tuberculous effusion (82.4±26.9 U/L) than that of nontuberculous effusion (18.8±11.6 U/L, p<0.001). Levels of both ADA and sIL-2R were lower in malignant effusion (16.4±9.66 U/L, 229+171 pmol/L) than those of tuberculous effusion. The sensitivity and specificity of IL-6 in discriminating tuberculosis from malignancy were 84% and 100% respectively (cut-off value: 10000 pg/ml). Those of sIL-2R were 87% and 77% (cut-off value: 350 pmol/L). ADA was most valuable in differentiating tuberculosis from malignancy, sensitivity and specificity of which were 100% (cut-off value: 40 U/L). The correlation coefficient of sIL-2R and IL-6 was 0.3822 (p=0.001). Conclusion: It was suggested that assay of IL-6, sIL-2R and ADA could play an implemental role in differential diagnosis of tuberculous pleural effusion. Increased level of the three parameters and significant correlations between them were suggestive of the involvement of activated T cells in tuberculous pleural effusion.
선박 건조에서 자동 블록 용접을 위한 경량모델 기반 용접선 생성
김형진(Hyung-Jin Kim),김희준(Hee-Jun Kim),이재창(Jae-Chang Lee),문승환(Seung-Hwan Mun),권기연(Ki-Youn Kwon) (사)한국CDE학회 2022 한국CDE학회 논문집 Vol.27 No.4
The welding process is the most time and cost consuming process and the quality of welding is also an important issue in shipbuilding. In order to improve these problems, welding automation robots are widely used. In general, the information of weld lines is received from the CAD system for welding automation in shipbuilding. In this study, we propose a method of generating weld lines for block assembly using a lightweight model that is already used in various processes in shipyards. The lightweight model is made for visualization purposes and has no information other than triangular elements. The shape is determined using the angle with the adjacent element, the part type is defined, and the ship coordinate system is converted into the working coordinate system. The sections are divided considering the workable range of the welding robot, and the welding lines are generated according the sections. This proposed method has been tested on several real models to demonstrate the feasibility.
간염성 심내막염을 합병한 대동맥-대퇴동맥 간 우회로 인조혈관 감염 1예
정동식,문승환,최세웅,이창재,김경태,백정환,정영진,조광조,강도영,이혁 대한감염학회 2005 감염과 화학요법 Vol.37 No.5
본 증례는 복부 대동맥류와 양 장골동맥 폐색증으로 대동맥-양대퇴동맥 간 우회로 인조혈관 이식술을 시행했던 환자에서 술 후 이식편 감염과 심내막염이 발병한 예이다. 환자는 이식편 감염의 진단이 모호할 때 Tc-99m HMPAO 백혈구 스캔을 통해 감염을 확인하고, 재수술을 시행하여 특별한 합병증 없이 회복하여 퇴원하였다. 이식편 감염의 진단에 있어서 대개는 일반적인 창상감염에서 볼 수 있는 발열, 백혈구 증다증, 수술부위의 농양, 화농성 분비물 등을 통해 진단한다. 또한 영상학적 검사로 컴퓨터 단층촬영, 자기공명영상 등의 검사를 통해 이식편 감염을 진단하기도 한다. 하지만 술 후 초기 내지저독성의 감염인 경우 그리고 진단이 모호한 경우에는 백혈구 스캔을 통해 신속히 이식편 감염을 더 잘 진단할 수도 있어 국내에서 이식편 감염 진단방법으로써 백혈구스캔의 더 많은 활용과 연구가 요구된다. Prosthetic vascular graft infection (PVGI) is a relatively uncommon complication of peripheral vascular surgery and although rare, is the most severe complication in reconstructive vascular surgery. The early diagnosis of this complication can reduce the mortality. We report a case of aorto-femoral bypass graft infection, which was diagnosed by Tc-99m HMPAO WBC scan, complicated with infective endocarditis. A 60-year-old man had been operated with aortofemoral bypass graft because of aortojejunal fistula due to abdominal aortic aneurysm. Nine months later, he was admitted with fever of two months' duration. On echocardiolography, aortic regurgitation and vegetation were observed, and then he was diagosed with infective endocarditis. He was treated with antibiotics for 6 weeks. Recurrent bacteremia of unknown origin persisted despite antibiotic therapy. Multiple microorganisms were separately isolated from the blood cultures. He complained of intermittent right groin pain. Imaging study (CT, MRI, US) showed no definite evidence of graft infection. However, Tc-99m HMPAO WBC scan demonstrated uptake in the aortofemoral bypass graft site. The patient underwent emergent aortofemoral graft removal with axillobifemoral bypass and right femoropopliteal bypass.