http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
색상 측정 기기를 이용한 복합레진 적층 수복과 단일 수복의 색상 비교 분석
송영상,김자현,이빈나,장지현,장훈상,황윤찬,오원만,황인남 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.2
Objectives: This study analyzed the difference in color caused by different thickness in enamel layer of composite resins when applied with single and layering placement technique, and evaluated if the results agreed with the shade guide from the manufacturers to verify reliability of the color matching process of the manufacturers. Materials and Methods: For single composite resin samples, 6 mm diameter and 4 mm thickness cylindrical samples were fabricated using Ceram-X mono (DENTSPLY DeTrey) and CIE L*a*b* values were measured with spectrophotometer. Same process was done for layering compositie resin samples, making 3 dentinal shade samples, 4 mm thickness, for each shade using Ceram-X duo (DENTSPLY DeTrey) and enamel shade resins were layered in 2 mm thickness and CIE L*a*b* values were measured. These samples were ground to 0.2 mm thickness each time, and CIE L*a*b* values were measured to 1 mm thickness of enamel shade resin. Results: Color difference (△E*) between single and layering composite resin was 1.37 minimum and 10.53 maximum when layering thicknesses were between 1 mm and 2 mm and 6 out of 10 same shade groups suggested by manufacturer showed remarkable color difference at anythickness (△E* > 3.3). Conclusion: When using Ceram-X mono and duo for composite resin restoration, following the manufacturer's instructions for chossing the shade is not appropriate, and more accurate information for Ceram-X duo is needed on the variation and expression of the shades depending on the thickness of the enamel. (Restor Dent Endod 2012;37(2):84-89)
유종훈,문성식 水原大學校 2014 論文集 Vol.28 No.-
In this study, we attempted to evaluate the feasibility of a supercritical methanol process for direct production of biodiesel from microalgae. The effects of various factors such as temperature, reaction time, water content and pretreatment on the efficiency of biodiesel conversion were investigated. The conversion efficiency increased with both temperature and extraction/conversion time. The supercritical methanol process produced a fatty acid methyl ester (FAME) yield of around 88% within 20 minutes. The optimal conditions for this process were found to be a microalgae/methanol ratio of around 1:9, a reaction temperature of about 270℃, and a reaction time of approximately 20 minutes. The effect of water content in microalgae samples on the FAME conversion was also evaluated. The supercritical methanol process was not affected by the water content up to 250 wt%. Our experiments demonstrated that the supercritical methanol process is more effective compared with conventional in situ transesterification processes.
콩에서 발생하는 강낭콩일반모자이크바이러스(BCMV)와 땅콩위축바이러스(PSV)의 저항성 평가
이영훈, 윤영남, 강범규, 김현영, 최만수, 구성철, 김현태, 윤홍태, 이수헌, 백인열 忠北大學校 農業科學硏究所 2014 農業科學硏究 Vol.30 No.2
It has been reported several viral diseases in soybean. The occurrence of Bean common mosaic virus and Peanut stunt virus are able to induce severe problem because the main breeding target for viral disease was focused on Soybean mosaic virus. BCMV is a spcies of the genus Potyvirus of the family Potyviridae. BCMV reduces yield by as much as 80% and also adversely affects seed quality in common bean. BCMV has a worldwide distribution because of its high rates 35% of transmission via seeds produced by plants systemically infected prior to bloom. PSV is a species of the genus Cucumovirus of the family Bromoviridae. PSV has been reported to be economically damaging on beans worldwide. Although the virus is reportedly seed transmissible at very low rates, infected plants rarely produce pods with normal viable seeds. The most satisfactory management method of viral diseases such as BCMV and PSV is the use of resistant cultivars and healthy seed. For the overcome of genetic resistance by new virus such as BCMV and PSV, virus diseases monitoring and researches need to study deeply and continually. In this study, we conducted the resistance screen on BCMV and PSV for selection of resistance cultivars. We inoculated on 128 cultivars with PSV and BCMV respectively. These cultivars were classified through pathogenic response such as resistance, necrosis and susceptibility. In addition, 99 and 66 resistant cultivars were confirmed against PSV and BCMV respectively.
[논문]斜角을 고려한 곡선 Box Girder교의 거동에 관한 연구
박성진,이승훈,진치섭 釜山大學校生産技術硏究所 2003 生産技術硏究所論文集 Vol.62 No.-
일반적으로 국도상의 교량은 기존도로의 확장이나 주변지형의 영향 등을 많이 받기 때문에 기하학적 형상이 직선교보다 사교나 곡선교인 경우가 많다. 예를 들어, 고속도로 인터체인지 및 도심지 내의 입체교량 둥에서 교통의 흐름을 원활히 하기 위해서 곡선 교량이 본격적으로 설계 · 시공되고 있다. 또한 구조물의 현장조건에 따라서 사각(skew angles) 이 있는 곡선교의 시공이 불가피하게 되었다. 본 연구에서는 절판구조물로 구성된 단면형태를 가진 곡선교에서 사각의 크기 및 곡률변화에 따른 구조물의 거시적인 거동을 유한요소 범용 프로그램인 SAP2000을 사용하여 비교 · 분석하였다.
이상훈,김수연 대구대학교 정보통신연구소 2012 情報通信硏究 Vol.9 No.1
본 논문은 다기준 의사결정 기법의 하나인 계층분석과정(AHP: Analytic Hierarchy Process)을 이용 하여 입지평가 모형을 수립하고 이에 대한 실증분석을 실시한다. 먼저 기존 연구를 통하여 입지선정 이 잘 이루어졌는지 확인하기 위한 평가요소를 도출하고 이를 이용하여 대학 사례에 대한 입지선정 평가모형을 수립한다. 평가요소들 간의 상대적 중요도를 파악하고 AHP를 적용하여 각 대안들 간의 우선순위를 산출한다. 대학 사례를 통하여 평가기준별 순위와 전체적인 순위를 제시하고 이에 따른 대학별 대응전략을 제시한다. 마지막으로 본 연구의 결과를 요약하고 향후 연구방향을 제시한다. This paper conducts an empirical analysis of location assessment using AHP(analytic hierarchy process), one of multi-criteria decision making techniques. First, we identify assessment criteria to evaluate location selection from literature review and establish a model of university location assessment based on identified criteria. Relative importance of each evaluation criterion is derived and then priorities of all possible alternatives are calculated. We rank each alternative by evaluation criteria and overall and propose responding strategies of the universities based on the evaluation results. Finally, we summarize the research and present future research direction