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고온 원자로용 Mod. 9Cr-1Mo강 후판재의 깊이에 따른 미세조직 및 기계적 특성 변화
이선희,박상규,김민철,이봉상,김선진,Lee, Sun-Hee,Park, Sang-Gyu,Kim, Min-Chul,Lee, Bong-Sang,Kim, Sun-Jin 한국압력기기공학회 2011 한국압력기기공학회 논문집 Vol.7 No.2
The purpose of this study is to investigate the effects of through thickness on the mechanical properties and microstructural features in Mod. 9Cr-1Mo steels for RPVs. The microstructures at all locations were typically tempered martensite, but small amount of delta ferrite was observed at the center region. The prior austenite grain size increased with the depth from the surface. The yield strengths of center and 1/4T location were higher than that of surface by 30MPa. The impact toughness of center was low compared to those of other specimens. Also, upper shelf energy was low at the center. The toughness deterioration in center might be caused by larger size of the prior austenite grains and existence of the delta ferrite.
팀기반 학습을 적용한 분만간호 시뮬레이션 실습교육이 간호대학생의 간호지식, 자기효능감과 임상수행능력에 미치는 효과
이선희,Lee, Sun Hee 한국여성건강간호학회 2018 여성건강간호학회지 Vol.24 No.2
Purpose: To identify the effects of delivery-nursing simulation education using team-based learning on the delivery nursing knowledge, self-efficacy, and clinical competence of nursing students. Methods: The study used a nonequivalent, control group, quasi-experimental design. The team-based learning was applied to the experimental group, while the individual learning was applied to the control group. Data were collected from October 12 to December 7, 2016, and analyzed using the SPSS/WIN 22.0 program. Results: Comparison between the experimental and control group showed no significant difference in delivery-nursing knowledge (t=-0.33, p=.741) or self-efficacy (t=-0.65, p=.515). However, a significant difference (t=-2.09, p=.048) in the nursing-skills aspect of clinical competence was found between the experimental and control groups after the practical simulation education. Conclusion: Delivery-nursing simulation education using team-based learning was more effective in improving the nursing-skills aspect of nursing competence than was delivery-nursing simulation education based on individual learning.
정액수가제 도입이 의료급여 혈액투석환자의 투석횟수 및 진료비에 미치는 영향
이선희,김한중,신승호,조우현,강혜영,Lee, Sun-Hee,Kim, Han-Joong,Shin, Seung-Ho,Cho, Woo-Hyun,Kang, Hye-Young 대한예방의학회 2004 예방의학회지 Vol.37 No.3
Objectives : To assess the impacts of implementing case payment system (CPS) to Medical Aid (MA) hemodialysis patients on the frequencies and expenditure of dialysis. Methods : Fifty-eight clinics and 35 tertiary care hospitals were identified as having a minimum of 10 hemodialysis patients for each of the MA and Medical Insurance (MI) programs, who received hemodialysis from the same dialysis facilities for both periods of July 2001 and July 2002. From these facilities, a total of 2,167 MA and 2,928 MI patients were identified as the study subjects. Using electronic claims data, the changes in the total number of monthly treatments and charges for outpatient hemodialysis treatments for each patient after the introduction of the CPS were compared between the MA and MI patients. Multiple regression analyses were performed to examine the independent impact of the CPS on the utilization and expenditure of dialysis treatments among the MA patients. Results : There was a significant decrease in the total charges for the hemodialysis treatments of the MA patients, 3.4% (p<0.05), whereas a significant increase was observed for the MI patients, 2.5% (p<0.05). For both the MA and MI patients, the frequency of the monthly hemodialysis treatments were significantly increased, 5.5 (from 12.1 to 12.7) and 7.8% (from 11.6 to 12.5), for the MA and MI patients, respectively. However, a multivariate regression analysis showed no significant difference in the changes in the total number of monthly hemodialysis treatments between the MA and MI patients after implementation of the CPS. Another regression model, regressing on the changes in the monthly claims of dialysis treatments, showed a significant negative coefficient for the MA ((=-70725, p<0.05). Conclusion : The significant decrease in the total charges for hemodialysis treatments among MA as compared to MI patients suggests that there was a cost reduction in the MA program following the introduction of the CPS.
탄소 나노섬유/PVDF-HFP 복합재로 코팅된 실크 직물의 물성
이선희,Lee, Sun-Hee 한국섬유공학회 2012 한국섬유공학회지 Vol.49 No.2
Silk fabrics were coated with carbon nano fibers (CNFs)/poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) composite solution by the knife edge method. The various contents of CNFs/PVDF-HFP coated silk fabrics were investigated through their morphological, mechanical, and electrical properties. In the results regarding surface morphology, it was shown that the CNFs were evenly distributed in coated silk fabrics through SEM images; the existence of CNFs in coated silk fabrics was confirmed. For the results regarding the mechanical properties, the tensile linearity and compression linearity improved as CNFs contents increased. Also, the electrical properties of CNFs/PVDF-HFP coated silk fabrics increased with 4% CNFs contents. Therefore, the results confirm the ability of conductive textiles by using CNFs/PVDF-HFP composite-coated silk fabrics.
의료소비자, 서비스 및 시장 특성요인과 고객충성도와의 관계 분석 -1개 중소도시의 의료이용 경험자를 대상으로-
이선희,김현미,김주혜,하귀염,Lee, Sun-Hee,Kim, Hyun-Mi,Kim, Ju-Hye,Ha, Gwi-Yeom 대한예방의학회 2008 예방의학회지 Vol.41 No.5
Objectives : This study was performed to explore customer royalty and the related factors. Methods : 900 households(a 1% sample) were randomly selected from the total population of K city located in Kangwon province. An interview survey was performed with using a structured questionnaire for the subjects(923 persons) who had used medical service during the year before the survey, and the survey was done September, 2002. Results : When comparing the relating factors related with customer royalty according to the sociodemographic characteristics, the older group showed a significantly higher level of recognition for service quality, service reputation, internal customers' attitudes and switching cost. The lower income group showed a higher level of recognition for service quality, service image and switching cost. The lower educated group showed a higher level of recognition for service reputation, service image and internal customers' attitudes. The higher educated group showed a higher level of recognition for perceived risk, and seeking variety. In addition, the expert group or the service and manufacturing workers group showed a higher level of recognition for service involvement. On multiple regression analysis, internal customers' attitudes, service image, service reputation, service quality, switching cost, and substitutability showed significant relations with customer loyalty. Conclusions : This study showed that customer loyalty was significantly influenced by service factors like internal customers' attitudes, service image, service reputation, and service quality, and by market factors like switching cost, and substitutability. The results of this study can be used as a baseline for developing strategies to create and keep customers with high loyalty.
용융 수지 압출 조형방식 3D 프린팅으로 제조된 텍스타일의 형태 및 물성
이선희,Lee, Sun Hee 한국섬유공학회 2015 한국섬유공학회지 Vol.52 No.4
In this study, the possibility of textile manufacture by 3D printing based on fused deposition modeling (FDM) was investigated. Among the various filaments that can be used for 3D printing, three polylactic acid (PLA) filaments and one thermoplastic polyurethane (TPU) filament was collected and then examined by dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC), and a tensile test. An Stereolithograpy (STL) file with a 3D textile model was prepared and transformed into a G-code file using a G-code generator. The extrusion conditions for 3D printing were controlled by nozzle speed, nozzle temperature, thickness of the outer layer, height of the layer, and extrusion speed. Textiles manufactured by 3D printing based on FDM using PLA and TPU filaments were obtained. A 3D textile sample prepared using TPU filament was analyzed for morphology, and thermal and tensile properties, and the following results were obtained: melt temperature of approximately $204^{\circ}C$, breaking load of 14 N, and elongation of 36%. Consequently, the applicability of 3D printing based on FDM for manufacturing textiles using TPU filament was confirmed.
이선희,조현혹,Lee, Sun-Hee,Nakayama, Kazuo,Cho, Hyun-Hok The Korean Fiber Society 2007 한국섬유공학회지 Vol.44 No.6
The purpose of this study is to determine a structural explanation for the improved ability of PBT for biaxial orientation at the temperature range of $100{\sim}180^{\circ}C$. In order to investigate the crystal structure and orientation, PBT films with biaxial and uniaxial stretching are examined using WAXD, MOA, etc. Thermal properties are confirmed by DMTA, DSC and mechanical properties are investigated using sonic propagation method and tensile tester. In WAXD results, original PBT films exhibit only ${\alpha}$-form crystallites, while biaxially stretched films show (100) of the ${\alpha}$-crystal phase with increased stretching temperatures. In MOA patterns, original and biaxially stretched PBT films show an isotropic pattern in the film plane. The planarity of the film increases with simultaneous transverse stretching and stretching temperature.
커피전문점의 시각이미지요소가 소비자 선호도에 미치는 영향
이선희,우나리야,Lee, Sun Hee,Woo, Nariyah 한국벤처창업학회 2015 벤처창업연구 Vol.10 No.3
소비자들이 커피전문점을 선택 방문 하는 가장 중요한 요인 중 하나는 시각적 요인이다. 커피전문점 선호도에 대한 분석 결과, 직업, 거주지, 결혼여부와 같은 응답자의 일반적 특성에 따라서 유의적인 차이가 나타났으며, 모든 일반적 특성 범주에서 스타벅스의 선호도가 가장 높은 것으로 나타났다. 커피전문점 매장 내 색체의 영향에 대한 분석 결과에서는 모든 일반적 특성 변수에서 통계적으로 유의한 차이가 나타나지 않았다. 또한 시각적인 상징컬러가 가장 영향을 주는 아이템은, 제공용품과 실내 인테리어가 중요한 아이템으로 조사되었다. 시각적인 상징컬러만으로 커피전문점을 선택 한다면 가장 기억에 남거나 방문하고 싶은 곳은 스타벅스였으며, 응답자의 일반적 특성에 따라서 차이가 나타난 변수는 평균용돈이었다. 시각적 상징컬러가 강하여, 선택된 커피전문점으로써 가장 기억에 남거나 방문하고 싶은 곳으로서 스타벅스, 엔젤리너스, 카페베네이었으며, 이디야가 색상이 그 커피전문점의 특성을 잘 나타내고 있어서'이었고, 할리스는 다른 곳과 비교해서 색상이 개성이 있어서로 조사되었다. 즉 본 연구에서는 커피전문점마다 커피 맛은 다르지만, 소비자들이 커피전문점을 방문할 때 시각적 요소의 중요도와 상징컬러의 선호도가 커피전문점의 선택에 중요한 영향을 미치는 것으로 분석되었다. 일반 소비자를 대상으로 조사하여 시각적 요소들이 어떠한 영향을 미치는지 알아보는 연구를 진행하였으며, 시각적 요소와 컬러마케팅이 중요한 요소임을 인식하여 발전시킬 필요가 있는 것으로 파악되었다. One of the most important factors for the consumers to select a coffee shop is a visual factor. The analysis results of interior pale face image of the coffee house doesn't show significant differences on all the categories. It is recognized that the items affected by symbolized color are supplies and interior design. If a respondent choose a coffee house by the symbolized color, 'Starbucks' is the most memorable or want to visit place, and only one category, pocket money shows significant difference in choosing coffee houses. The investigation results say that the most memorable or want to visit coffee house by the visual icon color are 'Starbucks', 'Angelinus' and 'Caffebene', and that 'Ediya's icon color marks the characteristics of the shop very well, and 'Hollys' has the most characterful color. Resultingly, visual elements and icon colors of the shop seriously affect consumer's choice in visiting a coffee house. This study is to understand the influence of visual elements in choosing a coffee house for general customers, and it is considered that the importance of visual elements and color marketing must be recognized and developed.