대만의 조세구조와 저축.투자 (연구총서52) 1~20

유정희 한국경제연구원 1988 韓國經濟硏究院 硏究叢書 Vol.- No.51

플립 칩 BGA 솔더 접합부의 열사이클링 해석

유정희,김경섭 한국마이크로전자및패키징학회 2003 마이크로전자 및 패키징학회지 Vol.10 No.1

시스템 보드에 플립 칩 BGA가 실장된 3차원 유한요소 해석 모델을 구성하여 열사이클시험 과정에서 발생되는 솔더 접합부의 피로수명을 예측하였다. 피로 모델은 Darveaux의 경험식에 기초하여 비선형 점소성 해석을 수행하였다. 해석은 4종류의 열사이클시험 조건과 패드구조, 솔더 볼의 조성과 크기의 변화에 따라 발생하는 크리프 수명을 평가하였다. 해석결과 $-65∼150^{\circ}C$의 열사이클시험 조건에서 가장 짧은 피로수명을 보였으며, $0∼100^{\circ}C$ 조건과 비교하면 약 3.5 배 정도 증가하였다. 동일한 시험조건에서 패드구조 변화에 따른 피로수명 차이는 SMD구조가 NSMD구조에 비해 약 5.7% 증가하였다 결과적으로 솔더 접합부에서 크리프 변형에너지 밀도가 높으면 피로수명은 짧아지는 것을 알 수 있었다 Global full 3D finite element analysis fatigue models are constructed for flip-chip BGA on system board to predict the creep fatigue life of solder joints during the thermal cycling test. The fatigue model applied is based on Darveaux's empirical equation approach with non-linear viscoplastic analysis of solder joints. The creep life was estimated the creep life as the variations of the four kinds of thermal cycling test conditions, pad structure, composition and size of solder ball. The shortest fatigue life was obtained at the thermal cycling test condition from $-65^{\circ}C$ to $150^{\circ}C$. It was increased about 3.5 times in comparison with that from $0^{\circ}C$ to $100^{\circ}C$. At the same conditions, the fatigue life of SMD structure as the change of pad structure increased about 5.7% as compared with NSMD structure. Consequently, it was confirmed that the fatigue life became short as the creep strain energy density increased in solder joint.

독일 : 나치 정권의 여성정책

유정희 역사비평사 2000 역사비평 Vol.- No.52

精神分裂症의 生化學

兪貞姬 서울대학교 의과대학 정신과학교실 1980 精神醫學報 Vol.4 No.8

2000년대를 향한 도시개발 : 이리시

유정희 대한지방행정공제회 1989 도시문제 Vol.24 No.8

초임의 변 / 나는 이렇게 일 하겠다 : 모든 공직자의 정신적 도장으로

유정희 대한지방행정공제회 1985 地方行政 Vol.34 No.385

한탄바이러스 Nucleocapsid Protein 발현에 있어 S Genome 내 Noncoding Region의 역할

유정희,이연승,이호동,박찬,박근용,이평우,Yu, Cheong-Hee,Lee, Yeon-Seung,Lee, Ho-Dong,Park, Chan,Park, Keun-Yong,Lee, Pyung-Woo 대한미생물학회 2000 Journal of Bacteriology and Virology Vol.30 No.1

The genome of Hantaan virus, the prototype of the hantavirus genus, is composed of three segmented, single stranded negative sense RNA genome. The 5' and 3' termini of the Hantaan virus RNA genome contain noncoding regions (NCRs) that are highly conserved and complementary to form panhandle structures. There are some reports that these NCRs seems to control gene expression and viral replication in influenza virus and vesicular stomatitis virus. In this study, we examined whether NCRs in Hantaan virus playa role in expression of the viral nucleocapsid protein (Np) and foreign (luciferase) gene. The 5' and/or 3' NCR-deleted mutants were constructed and analysed. The Np expression of 5' NCR-deleted clone was similar to that of the clone containing full S genome. In the case of 3' NCR-deleted clone, it showed 40% reduction. To investigate the role of NCR in foreign gene expression, the clones which are replaced ORF of Hantaan viral Np gene with that of luciferase gene were constructed. The results were similar to those of the experiments using Np gene. These results suggest that 3' NCR is more important than 5' NCR in protein expression. To find out a critical region of 3' NCR in protein expression, several clones with a deleted part of 3' NCR were constructed and analyzed. The deletion of the conserved region in 3' NCR showed $20{\sim}30%$ decrease in Np expression. However there were no change in luciferase activities between clones with or without non-conserved region of 3' NCR. These results suggest that the 3' NCR of Hantaan virus S genome, especially conserved region in 3' NCR, plays an important role in the expression of Hantaan viral Np and foreign genes.

간호학과 학생의 회복탄력성과 혁신적 조직문화가 셀프리더십에 미치는 영향

유정희,조정화 사단법인 인문사회과학기술융합학회 2018 예술인문사회융합멀티미디어논문지 Vol.8 No.2

The purpose of this study is to identify the correlation between resilience, innovational organization culture and self-leadership of nursing students and factors affecting self-leadership. The data were collected from 172 nursing students in the 3rd and 4th grade in the C city. The results of the study are as follows. (1) Resilience (r=.26, p<.001) and innovational organization culture (r =.26, p<.001) showed a statistically significant positive correlation with self-leadership. (2) In the first step, the hierarchical regression model was significant (F=6.34, p<.001). The explanatory power of self-leadership was 22.0%, age (t=4.22, p<.001), living arrangements (t=-2.64, p=.009), academic performance (t=-4.10, p<.001) and interpersonal relationship (t=-2.30, p=.022) were significant. The explanatory power of the second step hierarchical regression model was 27.5%(F=6.90, p<.001). Significant influencing factors affecting self-leadership of nursing students were age (t=3.33, p<.001), living arrangements (t=-2.82, p=.005), academic performance (t=-3.58, p<.001), interpersonal relationship (t=-2.28, p=.024), resilience (t=2.67, p=.008) and innovational organization culture (t=2.67, p=.008). As a result of this study, resilience and innovational organization culture were identified as variables influencing the self-leadership of nursing students. We suggest that resilience and innovative organization culture should be considered when developing programs to improve the self-leadership of nursing students. 본 연구는 간호학과 학생들의 회복탄력성, 혁신적 조직문화와 셀프리더십과의 관계를 확인하고 셀프리더십에 영향을 미치는 요인을 분석하기 위한 조사연구이다. C도에 소재하는 간호학과 3학년과 4학년 총 172명을 대상으로 자료를 수집 하였으며 연구결과는 다음과 같다. (1) 회복탄력성(r=.26, p<.001)과 혁신적 조직문화(r=,26 p<.001)는 각각 셀프리더십과 유의한 양의 상관관계를 나타내었다. (2) 단계 1에서 위계적 회귀모형은 유의하였으며(F=6.34, p<.001), 대상자의 일반적인 특성이 셀프리더십을 설명하는 설명력은 22.0%로 나타났으며, 연령(t=4.22, p<.001), 거주형태(t=-2.64, p=.009), 학업성적(t=-4.10, p<.001), 대인관계(t=-2.30, p=.022)가 유의한 영향요인으로 나타났다. 단계 2에서 회복탄력성과 혁신적 조직문화를 변수로 추가한 결과, 설명력은 27.5%로 나타났다(F=6.90, p<.001). 유의한 영향요인은 연령(t=3.33, p<.001), 거주형태(t=-2.82, p=.005), 학업성적(t=-3.58, p<.001), 대인관계(t=-2.28, p=.024)가 유의하게 나타났으며, 회복탄력성(t=2.67, p=.008)과 혁신적 조직문화(t=2.67, p.008)는 셀프리더십에 유의한 영향력을 나타났다. 이상의 연구결과를 통하여 회복탄력성과 혁신적 조직문화는 간호학과 학생들의 셀프리더십에 유의한 영향요인으로 확인 되었다. 간호학과 학생들의 셀프리더십을 높이기 위해서는 혁신적 조직문화를 형성하기 위한 노력이 필요할 것으로 생각되며, 회복탄력성을 향상시키기 위한 방안이 마련되어야 할 것을 제안한다.

사상체질별 스트레스인지와 대처방법

유정희,이향련,이의주 성인간호학회 2003 성인간호학회지 Vol.15 No.2

This study was founded to identify perception and ways of coping with stress according to classification of Sasangin(4 constitutions). Method: The subjects were 258 regular students who majored in oriental medicine in Jechon and Seoul. Data was collected by 3 types of questionnaires for 3 months: Perceived stress. ways of coping Questionnaires of Sasang Constitution classification9QSCCⅡ). Data analysis was conducted by SPSS vwesion 10. Result: 1) Difference of perceived stress in Sasangin: Perceived stress by the Sasangin indicated that Soenmin perceived more stress that Soyangin and Taeumin(P=.013). 2) Different method in coping with stress of Sasangin: It was found that Soeumin didn’t make use of emotional coping way according to the analysis(P=.040). 3) Relationship between way of coping for stress an perceived stress in Sasangin: It was shown that as Soeumin Perceived stress so higher than Sasangin and Taeumin,they tended to use the solving problem-method therefore I was shown to have a negative correlation(P=.044). Conclusion: In conclusion. it was found that there were difference of Sasangin in perceived stress and ways to cope with it. The dose relationship between the perception and coping method of stress was found.

산화지질 반응에 의한 단백질의 영양가

유정희 群山大學校 1990 論文集 Vol.17 No.-

Lipid oxidation occurs when unsaturated fatty acids autoxidize via free radical reactions into hydroperoxides, cyclic peroxides, epoxide, etc. These primary products subsequently degrade into a vast number of secondary products such as aldehydes, ketones and hydrocarbons. Many of the latter compounds give off flavours and cause rancidity in food stuffs. Lipid oxidation products can also react with protein-bound amino acids. The most sensitive amino acids have been reported to be methionine, cyst(e)ine, tryptophan, lysine, histidine and tyrosine. Chemical changes caused by interaction of lipid hydroperoxide and protein are protein cross-links, protein-lipid adducts, protein scission, and amino acid damage. The secondary products arising from hydroperoxide decomposition readily damage protein and amino acids through formation of covalent bonds. Among the secondary products, aldehydes have received the most attention because of their propensity of to form Schiff base adducts with amino groups, and, in particular, the bifunctional malonaldehyde can cross-link protein via Schiff base formation. Thus, the reactions between proteins and oxidizing lipids can lead to a considerable loss of the essential amino acid. In rat assays, significant reductions were observed in protein efficiency ratio, true nitrogen digestibility, and bioavailibility. All of the protein degradations discussed will influence protein functionality as well as nutritional value.