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기능 블록으로 구성된 대형 교환 소프트웨어의 신뢰도 성장
유재연,이재기 대한전자공학회 1998 電子工學會論文誌, S Vol.s35 No.1
We summarize, in this paper, that we have learned from the slftwar reliability analysis of a large switching software composed of functional blocks which form slotware units. To determine the time of management activity related to sopftware reliability growth, we review the process of detection and correction of software failures. Also we apply the two softwre reliability frowth model, Goel-Okumoto and S-shaped model, to estimate the global software reliability growth to a set of failure found during period of the system test. The analysis methods and results can be applied to other large software development projects.
통합교육 실천을 위한 발달장애인 부모의 평생교육참여 저해 요인 분석
유재연 한국통합교육학회 2017 통합교육연구 Vol.12 No.1
This study is to find out what the barriers to participating in lifelong education perceived by the parents of the children with developmental disabilities, to examine what kind of differences can be perceived by the social demographic characteristics of the parents and their children, and to investigate the effect of the barriers to participating in lifelong education for parents of the persons with developmental disabilities on the intention of participating in lifelong education in the future. For this study, the results of the survey targeting 198 parents who have never experienced the lifelong education programs among the parents of the children with developmental disabilities have been analyzed and the principal results of the study are as follows. Firstly, the institutional barriers and the informational ones among the barriers to participating in lifelong education are found to be perceived highest. Secondly, the results of examining the difference among the barriers to participating in lifelong education depending on the social demographic characteristics of the parents and their children show that the situational barriers vary according to the gender of parent, the total income of the family, the type of the child's disability, and the expectancy of occupation and the institutional barriers to the educational background of parent and the expectancy of occupation of the child, and the dispositional ones to the type of the child's disability. Thirdly, the results of analyzing the effect of the barriers to participating in lifelong education for parents of the persons with developmental disabilities on the intention of participating in lifelong education in the future show that the higher the dispositional barriers are, the lower intention of participating in lifelong education in the future are. Based on the above-mentioned results of the study, some discussions have been made on how to enhance the rate of participating in the lifelong education for parents of the persons with developmental disabilities and to improve their quality of life. 이 연구의 목적은 통합교육의 실천이라는 관점에서 발달장애인 부모의 평생교육 참여 저해 요인을 분석하고자 하는 것이다. 연구를 위한 설문 대상은 발달장애 부모 가운데 아직까지 한 번도 평생교육 프로그램을 이용한 경험이 없는 198명이다. 연구의 주요 결과는 다음과 같다. 첫째, 평생 교육 참여 핵심 저해 요인은 제도적 저해 요인과 정보적 저해 요인이다. 둘째, 부모 및 발달장애자녀의 인구사회학적 특성에 따른 부모의 평생교육 참여 저해 요인의 차이를 검증한 결과, 상황적 저해 요인은 부모의 성별, 가족의 전체 수입, 자녀의 장애유형 및 직업 가능성에 따라 차이를 나타냈고, 제도적 저해 요인은 부모의 학력과 자녀의 직업 가능성에 따라 차이를 나타냈으며, 성향적 요인은 자녀의 장애유형에 따라 차이를 나타냈다. 셋째, 발달장애인 부모의 평생교육 참여 저해 요인이 향후 평생교육 참여 의사에 미치는 영향을 분석한 결과, 성향적 저해 요인이 높을수록 향후 평생교육 참여 의사가 낮은 것으로 나타났다.
지방산으로 유발된 비알코올지방간질환 실험모델에 미치는 생간탕가미방(生肝湯加味方)의 효과
유재연,이장훈,Yoo, Jae-Yeon,Lee, Jang-Hoon 대한한방내과학회 2010 大韓韓方內科學會誌 Vol.31 No.2
Objectives : This study was designed to investigate the effects of Saenggantanggami-bang (SG) on nonalcoholic fatty liver disease. Methods : HepG2 cells were used in an in vitro model. HepG2 cells were divided into three groups. The Normal group was incubated with no fatty acid. The Control group was incubated with 1mM palmitic acid to introduce fat overloading. The PA-SG group was incubated with 1mM palmitic acid and various concentrations of Saenggantanggami-bang (SG). Cell viability and cytotoxicity were analyzed by MTT assay and LDH assay. Intracellular triglyceride (TG) levels, reactive oxygen species (ROS) levels, ATP amount, and GST activity were measured. Cell death pattern and protective effect of SG on cell death were studied by DNA fragmentation and caspase-3 intensity (western blot). Results : Compared with the Control group, cell viability of the PA-SG group significantly increased (P<0.01), cytotoxicity of the PA-SG group decreased (P<0.01), and intracellular TG levels and ROS levels of the PA-SG group decreased (P<0.05). In DNA fragmentation assay, necrotic pattern was observed and DNA fragment decreased in the PA-SG group. In western blot, apoptotic pattern was observed, caspase-3 intensity of the PA-SG group was reduced significantly, but there were no significant differences in intracellular ATP amount and GST activity between the control group and the PA-SG group. Conclusion : The results suggest that Saenggantanggami-bang can be a potential candidate for the clinical treatment of nonalcoholic fatty liver disease.