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김승남,Kim, Seung-Nam 한국방위산업진흥회 1993 國防과 技術 Vol.- No.172
대공방어무기로 미사일은 기동성 및 긴사거리 때문에, 기관포는 가격이 낮고 많은 탄알을 한꺼번에 사용할수 있다는 이점 때문에 사용되고 있습니다 현재 이 2가지 무기를 하나의 방공 시스템 아래에 두고자 하는 노력들이 진행되고 있으며, 각 무기의 역할 분담이 이루어져 좀 더 유연하게 대공임무를 수행할수 있을 것입니다 어떠한 무기체계이든 만든 목적과 수단이 확실하여야 하며, 그 장점과 단점을 비교 분석해서 연구되어져야 할 것입니다
지점변형을 하는 모임지붕형 쌍곡포물선쉘의 유한요소 해석
김승남,유은종,나창순,Kim, Seung-Nam,Yu, Eun-Jong,Rha, Chang-Soon 한국공간구조학회 2012 한국공간구조학회지 Vol.12 No.4
This study investigated the behaviors of the gabled hyperbolic paraboloid shell structure subjected to differential settlement and the horizontal displacement due to the elongation of tie rod/beam on supports. Two types of shell structure with different roof slopes are used in study; conventional type which has perimeter beams around the shell panel, and simple type which removes the edge beams along the slab edge line. The effect of the removal of edge beam under vertical or horizontal displacement on supports, and the roof slope was compared using the finite element analysis.
김승남,유은종,나창순,Kim, Seung-Nam,Yu, Eun-Jong,Rha, Chang-Soon 한국공간구조학회 2012 한국공간구조학회지 Vol.12 No.1
본 연구에서는 쉘의 테두리를 보가 둘러싸고 있는 전통적인 형태와 모서리보를 제거한 형태의 모임지붕형 쌍곡포물선쉘구조의 유한요소해석결과비교를 통해 모서리보의 역할을 확인하고, 또한 지붕의 경사도의 영향을 분석하였다. 유한요소해석에 의하면 쉘면에 작용하는 하중은 쉘 대각선 방향의 아치작용을 통해 모퉁이의 지점에 직접 전달되므로 막이론에 비해 테두리보에는 부재력이 작게 작용하고 모퉁이의 지점 부분의 쉘에는 응력이 증가되는 것으로 나타났다. 모서리보를 제거하면 지점 부근의 쉘에 더욱 응력이 집중되고 경사진 모서리 부분의 처짐이 증가하는데 이와 같은 현상은 지붕의 경사도가 낮아짐에 따라 현저해지는 것으로 나타났다. 따라서, 모임지붕형 쌍곡포물선쉘 구조에서는 지점 부분의 쉘두께를 보다 증가할 필요가 있으며 경사도가 낮은 쌍곡포물선쉘 구조의 모서리보 제거는 주의가 필요한 것으로 나타났다. In this study, mechanical role of edge beams in the gabled hyperbolic paraboloid shells was investigated through the comparisons of Finite element(FE) analysis results between the shells structures with and without edge beams. In addition, the effects of roof slope was studied. FE analysis showed that roof loads was directly transferred to the supports at corners by the arch action in the diagonal direction of the shells, thus, less member forces in the edge and ridge beams but higher stresses near supports were estimated than those from the membrane theory. When the edge beams were removed, stress concentration in the shells near the supports and the deflections along the shell edge were increased. Such phenomenon were intensified as the roof slope decrease. Thus, in gable hyperbolic paraboloid shell, the thickness of the shell near supports needs to be increased and careful investigation should be made in the cases when the roof height is low and/or the edge beams are removed.
김승남,구영,류인철,함병도,배기환,한수부,정종평,최상묵,Kim, Seung-Nam,Ku, Young,Rhyu, In-Cheol,Hahm, Byung-Do,Bae, Ki-Hwan,Han, Soo-Boo,Chung, Chong-Pyoung,Choi, Sang-Mook 대한치주과학회 2000 Journal of Periodontal & Implant Science Vol.30 No.1
The purpose of this study was to evaluate the antimicrobial activity of Crassirhzimae rhizoma and its possible use as an oral antiseptics for prevention of periodontitis. Its antibacterial activity against periodontopathic microorganisms including Actinobacillus actiomycetem - comitans, Capnocytophaga ochracea, Streptococcus mutans, Porphyromonas gingivalis, Prevotella intermedia, Actinomyces viscosus, Fusobacterium nucleatumwas evaluated via modified stab culture method. The cytotoxicity against gingival fibroblasts and rat osteoblasts was investigated via [$^3H$]thymidine incorporation and cellular activity was investigated via MTT assay. Chlorhexidine was used as control group. Crassirhizomae rhizoma was prepared at concentrations of 0.2, 0.15, 0.1, 0.05%. Chlorhexidine was also prepared at the same concentration. Crassirhizomae rhizoma showed lower antimicrobial antivity against these microorganism than chlorhexidine, but this difference was not significant. And, Crassirhzomae rhizoma showed more cellular activity and less cytotoxicity than chlorhexidine on human gingival fibrablast and rat osteoblast. This study suggests that Crassirhzomae rhizoma might be a candidate for a safe oral antiseptic for the prevention and treatment of periodontal disease.
간장 ( 肝腸 ) 및 담도 ( 膽道 ) : 원발성간암의 임상적 고찰
김승남(Seung Nam Kim),주상용(Sang Yong Choo),이종서(Jong Seo Lee),이종화(Jong Wha Lee),김응국(Eung Kook Kim) 대한소화기학회 1990 대한소화기학회지 Vol.22 No.3
N/A Primary hepatoma have been relatively common due to developed diagnostic maneuver. This tumor is quite prevalent in Asia, Africa and cirrhosis is an etiologic factor as concomittant disease. Recently large number of surgeon reported excellent surgical result. This report is clinical review of 50 patients who were diagnosed as a primary hepatoma at the Department of Surgery, Catholic University Medical College from March, 1978 to December, 1989. The following results were obtained: 1) The male to female ratio was 5.2:1. The age distribution indicated a prominent incidence between 4th. and 5th. decade. 2) Symptom and signs on admission were right upper quadrant abdominal pain (72%), malaise (20%), indigestion (12%), fever (12%). The liver cirrhosis was associated in 23 cases (46%). 3) The most common anatomical location of tumor was right lobe in 32 cases (64%) and the size of tumor was most common in 5~10 cm (24 case, 48%). 4) Histopathological examination revealed hepatocellular carcinoma (45 cases, 90%), cholangiocarcinoma (2 cases) and hepatoblastoma (2 cases). 5) Hepatic resection was performed in 30 cases (60%) and others were hepatic artery ligation in 14 cases (28%) and exploration and biopsy in 6 cases (12%). 6) Postoperastive complications were noted in 12 cases (24%), among which pleural effusion was most common (12 cases) and the other complications were postoperative bleeding (5 cases), hepatic coma (4 cases). 7) Overall hospital mortality was 24% and the cause of death were hepatic failure (6 cases), hepatorenal syndrome (3 cases), GI bleeding postoperative bleeding and D.I.C.