http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이유상,박홍근 한국콘크리트학회 2024 콘크리트학회논문집 Vol.36 No.2
기능상 기밀 성능이 중요한 시설 구조물의 경우 유량에 대한 정량적 평가가 필요하다. 이 연구에서는 균열이 발생한 철근 콘크리트 요소의 공기 유량을 평가하기 위한 실험을 수행하였다. 기밀 압력 시험을 위해 비교적 셋업으로 최대 200 kPa의 내압을 견딜 수 있는 중공보 시험체를 설계하였다. 횡하중에 의해 하부 플랜지에 인장 균열이 발생하면 보 내부의 중공에 공기압을 가압하였으며, 하중을 증가하며 누설률을 계측하였다. 실험 변수는 하부 플랜지 판의 두께와 철근비였다. 실험 결과 누설률은 압력차 및 평균 균열폭의 세제곱에 비례하였고, 판의 두께와 철근비에는 반비례하는 것으로 나타났다. A quantitative assessment of air flow rate is required for infrastructure where its airtight performance is crucial. In this study, a test was conducted to assess the air leakage rate of cracked reinforced concrete elements. A hollow beam specimen was designed to withstand pressures up to 200 kPa, employing a relatively simple set-up for airtight pressure test. While the bottom flange was subjected to tension cracking under transverse loading, air pressure was applied into the air chamber of the beam, and the air leakage rate was measured as the magnitude of loading was increased. The test variables included plate thickness and reinforcement ratio. The test results showed that the leakage rate was proportional to the pressure difference and the cube of the average crack width, and was inversely proportional to plate thickness and reinforcement ratio.
한국인 남자에서 Synapsin III 유전자의 D22S280 표지자와 정신분열병의 연합연구
이유상,박종원,이승연,이석진,박용범,신윤식,유장근,홍경수,양병환,Lee, Yu-Sang,Park, Chong-Won,Lee, Seung-Yeoun,Lee, Suk-Jin,Park, Yong-Bum,Shin, Yoon-Sik,Yoo, Jang-Keun,Hong, Kyung Sue,Yang, Byung-Hwan 대한생물정신의학회 2006 생물정신의학 Vol.13 No.4
Objectives : Synapsin III near VCFS region on chromosome 22q affects. It could be an interesting candidate gene for schizophrenia. D22S280 is a highly polymorphic genetic marker residing in synapsin III. We examined association of D22S280 marker on synapsin III with Korean patients with schizophrenia. Methods : The subjects were 46 male Korean patients with schizophrenia and 60 male normal controls. Using polymerase chain reaction, gel electrophoresis, ABI 310 genetic analyzer, and GeneScan Collection 3.1 software, we confirmed genotypes of D22S280 marker. We examined Hardy-Weinberg equilibrium and case-control association using SAS/Genetic 9.1.3. Results : Genotypes of both schizophrenia and control groups were in Hardy-Weinberg equilibrium. We could not find any significant statistical differences in allele-wise(${\chi}^2$=10.4, df=6, p=0.098) and genotype-wise (${\chi}^2$=22.1 df=19, p=0.258) analyses of D22S280 marker between schizophrenia and normal controls. Individual allele analyses with df=1 showed significant differences in A1(p=0.025) and A7(p=0.034) allele, which were not significant following Bonferroni corrections(A1:p=0.177, A7:p=0.235). Conclusion : We couldn't find any association between schizophrenia and the synapsin III gene. Given the small number of subjects studied, further investigations are needed.
족부 및 족관절의 개방성 골절 환자에서 음압 치료와 실버 드레싱 제재 복합 치료의 유용성
이유상,조재호,박 진,한승환,Lee, Yu-Sang,Cho, Jae-Ho,Park, Jin,Han, Seung-Hwan 대한족부족관절학회 2008 대한족부족관절학회지 Vol.12 No.2
Purpose: Open fractures of the foot and ankle require prompt repair of the wound due to the complexity of anatomy, insufficiency of soft tissues and inadequate blood supply. Early flaps and skin grafts are used for this purpose yet general condition of the patient as well as local wound environment often precludes such treatment options. Vacuum- Assisted Closure (VAC) is recently being used in such cases. This study was done to validate the use of VAC together with silver antimicrobial dressing materials in contaminated open fracture wounds. Materials and Methods: We have selected 10 patients with Gustillo-Anderson type III open fractures of the foot & ankle treated with VAC and silver antimicrobial dressing materials from March 2007 to January 2008. The relationship between duration of treatment with wound size, contamination, and degree of soft tissue damage was analyzed. Results: The average age of patients was 36.6 years. The average amount of VAC application time was 23.4 days. Silver dressing materials were used for 16.8 days. Average wound healing time was 51.9 days. Statistically significant relationship was found between wound size, VAC application time and silver dressing material application time. No complications such as osteomyelitis were found after treatment. Conclusion: VAC technique is recently being used in open fractures with wide skin and soft tissue defects, producing good results. A wide array of dressing materials such as silver dressing is in development. We have incorporated the VAC technique together with silver dressing materials in the treatment of open fractures and achieved complication free results.
이유상,김주형,박홍근 한국콘크리트학회 2022 콘크리트학회논문집 Vol.34 No.3
층응답스펙트럼(FRS)은 통상 원자력 발전소 내에 설치된 기기를 평가하기 위해 사용된다. 관례적으로 사용되는 집중질량모델에서 층응답스펙트럼을 작성하면 층의 모든 응답이 간략화된다. 하지만 실제로는 서로 다른 위치에서의 개별 응답 간에는 차이가 존재하며, 이는 기기의 취약도에 상당한 영향을 미칠 수 있다. 본 연구에서는 이러한 특성을 고려하여 3-D 유한요소 모델을 통해 다른 위치에서 층응답스펙트럼을 생성하여 비교하였다. 그 결과 동일 층 내에서도 무시할 수 없는 변동성이 존재함을 보였다. 앵커 파괴에 대한 취약도 해석을 수행하여 위치에 영향을 받는 층응답스펙트럼의 변동성에 의해 고신뢰도저파괴확률(HCLPF)에도 편차가 발생함을 확인하였다.