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신우승,김진구,Shin, Woo-Seung,Kim, Jin-Koo 한국전산구조공학회 2008 한국전산구조공학회논문집 Vol.21 No.5
본 논문에서는 중 약진 지역에서 중력 저항시스템인 중간 모멘트골조로 설계된 3층, 6층 RE 플랫플레이트 구조물을 KBC 2005를 만족하도록 RC구조물에 강판과 가새/ BRB 등의 보강방법을 적용하여 보강하고, 내진성능을 평가하여 보강 효과를 검증하였다. 비탄성 정적해석과 동적해석 결과에 따르면 내진 보강된 구조물은 강도와 강성이 크게 향상된 것으로 나타났다 특히 기둥을 철판으로 보강한 경우 슬래브를 철판으로 보강하여 조기 뚫림 전단파괴를 방지함으로써 강도를 크게 향상할 수 있다. BRB로 보강된 구조물은 Brace로 보강된 구조물보다 다소 연성적 거동을 보였으며, 그 효과는 3층 모델에서 현저하게 나타났다. In this study 3- and 6-story flat plate structures designed only for gravity load are retrofitted with steel plates and braces and their seismic performances are evaluated to verify the effect of seismic retrofit. According to the analysis results obtained from nonlinear static and dynamic analyses both the strength and stiffness are significantly enhanced as a result of the seismic retrofit. Especially the effect of column jacketing could be enhanced significantly when slabs were reinforced to prevent premature punching shear failure. When buckling-restrained braces are used instead of conventional braces, the structures showed more ductile behavior, especially in the 3-story structure.
신우승(Shin Woo-Seung),김진구(Kim Jin-Koo) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.5
These days the safety against progressive collapse is considered as important as safety against earthquakes in some structures. This study investigates the seismic and progressive collapse performance of 3- and 6-story RC framed structures reinforced by post-tensioned strands. The effects of both parallel and X-type installation schemes for strands were compared. According to nonlinear static and dynamic analysis results, the nonseismic-designed model structures were vulnerable to progressive collapse caused by sudden loss of a first story column. Especially the model structures designed with prestressed tendons were more vulnerable to progressive collapse because of smaller member sizes. However the RC structures reinforced by external strands along floor girders showed stable behavior against progressive collapse. The seismic performance was also slightly enhanced as a result of the reinforcement.
강선과 FRP로 보강된 저층 무량판 구조물의 내진 성능 평가
신우승(Shin Woo-Seung),김진구(Kim Jin-Koo) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
In this study a 3 story flat plate structure designed only for gravity load was retrofitted by post tensioning columns with high strength tendons. The seismic performance of the non seismic designed model structure, obtained by nonlinear static and dynamic analyses, was compared with the performance of the structure after the seismic retrofit. The analysis results showed that the stiffness, strength, and the ductility of the flat plate structure could be enhanced by enforcing compression to columns. The seismic performance of the post tensioned columns could be further increased by rapping the columns with FRP sheet to provide confinement.
기둥의 강선 및 강판보강에 의한 무량판 구조물의 내진보강
신우승(Shin Woo-Seung),김진구(Kim Jin-Koo) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.12
In this study a seismic retrofit scheme for flat plate structures by post-tensioning columns was investigated. The analysis model structure is a 3-story flat plate structure designed only for gravity load. The design parameters of the retrofit scheme were identified through analysis of a single-degree-of-freedom system composed of a column and a mass. As the nonseismic-designed flat plate structures are vulnerable to punching shear failure, the slabs need to be reinforced by steel plates before reinforcing the columns. The seismic performance of the non-seismic designed model structure, obtained by nonlinear static and dynamic analyses, was compared with the performance of the structure after the seismic retrofit. The analysis results showed that the stiffness, strength, and the ductility of the flat plate structure could be enhanced by enforcing post-tension force to columns. The seismic performance of the columns could be further increased by jacketing the columns with FRP sheet or steel plates to provide additional confinement and/or axial strength.
좌각 차단 및 하향성 전기축을 보이는 특발성 심실 빈맥의 전극도자 절제술: 우측 전흉부 유도상 R파의 형태적 차이의 의의
이만영 ( Man Young Lee ),신우승 ( Woo Seung Shin ),진승원 ( Seung Won Jin ),오용석 ( Yong Seok Oh ),허민 ( Min Huh ),정성훈 ( Sung Hoon Jung ),장시진 ( See Jin Jang ),임민경 ( Min Kyung Lim ),김연성 ( Yeon Seong Kim ),노태호 ( Ta 대한내과학회 2005 대한내과학회지 Vol.68 No.4
관상동맥 질환으로 입원한 한국인 환자의 임상양상과 예후인자
조진만 ( Jin-Man Cho ),김종진 ( Chong-Jin Kim ),신우승 ( Woo Seung Shin ),조은주 ( Eun-Ju Cho ),박철수 ( Chul-Soo Park ),김범준 ( Pum Joon Kim ),이종민 ( Jong-Min Lee ),임상현 ( Sang-Hyun Ihm ),임효영 ( Hyou-Young Rhim ),장기육 ( 대한내과학회 2007 대한내과학회지 Vol.73 No.2
Background: Coronary artery disease (CAD) has recently become one of the major causes of mortality and morbidity in Korea. However, not much epidemiologic and demographic data has yet been reported. The purpose of this study was to investigate the clinical features as well as the prognostic factors of patients with CAD. Methods: We prospectively enrolled 1,665 consecutive patients with CAD who had been admitted to the Catholic University Hospitals from December 1999 to April 2003. Results: Acute myocardial infarction (AMI) was the most common cause of admission (n=715, 42.9%). Dyslipidemia, hypertension and smoking were the most common risk factors. More than 70% of the patients who underwent percutaneous coronary intervention (PCI) received stent implantation. A total of 965 (612 males) patients were followed at least for 6 months (the mean follow-up duration was 23.8±12.2 months). The incidence rates of major adverse cardiac events (MACE: cardiac death, acute myocardial infarction, target vessel revascularization) and cardiac death were 15.1% (n=146) and 2.2% (n=21), respectively. There was no difference in overall survival between the patients treated with medical therapy and those treated with PCI. By Cox regression analysis, the independent prognostic factors for MACE were PCI (95% CI: 1.75-4.85; p<0.01) and multivessel disease (95% CI: 1.03-2.04; p<0.05), and the independent prognostic factors for cardiac death were medical therapy (95% CI: 1.08-14.41; p<0.05) and old age (95% CI: 1.13-16.13; p<0.05). Conclusions: There was no difference in overall survival between the patients treated with medical therapy and those treated with PCI. However, PCI was superior to medical therapy for preventing death of the patients with acute coronary syndrome.(Korean J Med 73:142-150, 2007)
김병수,신우승,장재순,김성래,김영옥,김상우,김양리,강문원,방병기 대한감염학회 1997 감염 Vol.29 No.2
저자들은 배양된 균주는 없었지만 감염성 설사에 동반된 성인형 용혈성 요독증후군 2예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Hemolytic uremic syndrome (HUS) is defined by the triad of renal failure, thrombocytopenia and hemolytic anemia. HUS is usually developed by infectious disease in children, but occasionally in adults. Infectious disease associated with HUS is characterized by fever and diarrhea-commonly related with Escherichia coli O157:H7. Verotoxin (Shiga-like toxin) produced by E. coli damage the endothelial cells, promote local thrombosis and finally step to HUS. Other causes of HUS include drugs, pregnancy, organ transplantation and malignant tumor. We report two adult patients cases of HUS associated with infectious diarrhea.
급성 신우신염에서 Gentamicin 1일 1회 요법과 분할 요법의 효과 및 부작용 비교
김양리,성광용,송치원,신우승,조은주,최정현,강문원 대한감염학회 1997 감염 Vol.29 No.2
목적:급성 신우신염 환자를 대사응로 gentamicin 1일 1회 요법과 분할 요법의 효과 및 부작용을 비교하였다. 방법:분할 투여군은 Gentamicin 3-5mg/kg을 1일 3회에 나누어 분할 투여하거나, 1일 1회 투여하였다. 임상적 효과와 독성 여부를 판정하고, gentamicin의 혈중 최고 농도와 최저 농도를 측정하였으며, 소변의 β₂-microglobulin과 N-acetyl-β-D-glucosaminidase를 측정하여 신독성 예측의 지표로 삼을 수 있는지 알아 보았다. 결과: 1)1회 투여군 19명, 분할 투여군 15명에서 모두 호전되었고, 미생물학적으로 원인균이 검출된 경우는 1회 투여군에서 19명 중 15명, 분할 투여군에서 15명 중 12명으로 모두 E.coli였으며, 치료 후에 모두 소실되었고, 신독성이나 이독성은 한 예도 없었다. 2)Gentamicin 혈중 최고 농도는 1회 투여군에서 평균 평균 14.79±5.71㎍/mL, 분할 투여군에서 5.33±1.99㎍/mL, 최저 농도는 1회 투여군에서 평균 0.35±0.45㎍/mL, 분할 투여군에서 0.69±0.58㎍/mL였다.. 3)분할 요법에서 gentamicin 혈중 최고 농도가 7.0㎍/mL 이상인 경우는 15예 중 2예, 5.0±㎍/mL 미만인 경우는 15예 중 7예였다. 4)소변의 β₂-microglobulin 농도는 두 군을 통털어 치료 전 2.71±2.20-㎍/mL, 치료 후 0.37±0.90㎍/mL이었고, N-acetyl-β-D-glucosaminidase 농도는 치료 전 8.67±7.39U/L, 치료 후 17.74±7.86 U/L였다. 결론:급성 신우신염환자에서 gentamicin 1일 1회 요법은 분할 요법과 비교하여 임상적, 미생물학적 효과 및 부작용에서 차이가 없는 것으로 나타났다. 위중한 그람 음성 간균 감염에서는 gentamicin의 분할 요법으로 적절한 혈중 최고 농도를 얻기 어려우며, aminoglycoside 사용시 소변의 N-acetyl-β-D-glucosaminidase를 측정하는 것이 신독성 예측의 지표가 될 수 있을 것으로 추측된다. Background: Once daily dose of aminoglycoside has been used recently in the gram-negative infection for the purpose of improving efficacy. The clinical efficacy and side effects of once daily versus divided doses of gentamicin were compared in acute pyelonephritis. Method: Gentamicin (3-5mg/kg/day) was administered into 3 divided doses intravenously in 15 patients of the divided dose group, and the same dose was administered at a time in 19 patients of the once daily dose group. The duration of treatment was 6-14 days. Results:The clinical outcome of all patients was favorable, and nephrotoxicity or ototoxicity was not detected in any patients. E. coli were isolated from 12 patients in the divided dose group, and 15 patients in the once daily dose group. They were all eradicated after treatment. The mean peak serum concentrations of gentamicin were 5.33±1.99㎎/mL in the divided dose group, and 14.79±5.71㎍/mL in the once daily dose group. The trough concentrations were not different significantly between two groups(0.69±0.58㎍/mL in the divided dose group vs. 0.35±0.45㎍/mL in the once daily dose group). The number of patients with peak concentration over 5.0㎍/mL were 8 out of 15 in the divided dose group. Conclusion: The once daily dose of gentamicin was as effective as the divided dose, and the nephrotoxicity or ototoxicity was not observed in both groups.