• 지역사회간호학회지
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• 제13권3호
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• pp.566-573
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• 2002

A concept is a building block of a theory. The purpose of a concept analysis is to clarify the critical attributes of a concept and identify its real meaning, particularly if the concept is not understood in a clear and accurate manner. This study was conducted to analyze the concept of support, which has been adopted from another discipline and unclearly used in nursing science. For concept analysis of this study, Walker and Avant's method was used. Support is defined as a domain with emotional. informational. material and evaluative aspects. Critical attributes of the concept of support included (1) an experience of support between a support provider and a client, (2) communication, (3) a relationship of mutual interchange of emotional, informational, material, evaluative support, and (4) intention, Cases related to the concept of support included model cases and appendix cases (against. boundary, and related). Antecedents of support were anxiety, depression, and loss of self-esteem, and consequences of support were comfort, increase of self-esteem, and trust. Based on these results, a nursing intervention that can provide a better quality of life for the prevention of diseases, health management, and health promotion may be developed in the future.

• Current Optics and Photonics
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• 제3권5호
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• pp.429-437
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• 2019

Temperature adaptability is an important metric for evaluating the performance of an optical system. The temperature characteristics of the optical system are closely related to the material and shape of its lens. In this paper, we establish a mathematical model relating the temperature characteristics to the shape and material of the lens. Then a novel assembly structure that can solve the lens constraint and positioning problem is proposed. From those basics, the correctness of the theoretical model and the effectiveness of the assembly structure are verified through simulated analysis of the imaging quality of the optical system, whose operating temperature range is $-60{\sim}100^{\circ}C$.

• 한국재료학회지
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• 제29권11호
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• pp.670-676
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• 2019

We study substrate support structures and materials to improve uptime and shorten preventive maintenance cycles for chemical vapor deposition equipment. In order to improve the rolling of the substrate support, the bushing device adopts a ball transfer method in which a large ball and a small ball are mixed. When the main transfer ball of the bushing part of the substrate support contacts the substrate support, the small ball also rotates simultaneously with the rotation of the main ball, minimizing the resistance that can be generated during the vertical movement of the substrate support. As a result of the improvement, the glass substrate breakage rate is reduced by more than 90 ~ 95 %, and the equipment preventive maintenance and board support replacement cycles are extended four times or more, from once a month to more than four months, and the equipment uptime is at least 15 % improved. This study proposes an optimization method for substrate support structure and material improvement of chemical vapor deposition equipment.

• 문화기술의 융합
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• 제6권2호
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• pp.535-541
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• 2020

현행 탄성 재료 교체 및 성능평가는 작업성 및 작업공정이 매우 복잡하고 시간도 많이 소요됨은 물론 탄성 재료의 교체시기를 사전에 파악하기 어려운 반면, 본 연구에서 제시한 방법은 탄성 재료의 궤도지지강성 변화율을 상품 한계치와 기능 한계치를 비교 표시해 줌으로써 탄성 재료 교체의 필요성 및 교체 전, 후의 궤도지지강성 개선효과를 현장에서 즉각적으로 실험데이터를 바탕으로 입증이 가능하다. 또한 궤도지지강성 평가 소프트웨어를 이용하여 현장시험을 통해 획득한 탄성 재료에 대한 성능평가 데이터가 관리자 컴퓨터에 통합 관리되기 때문에 탄성재료의 교체시기 및 위치를 파악함으로써 교체 계획 수립 및 유지관리 이력 관리가 가능하다. 따라서 선로 순회하는 작업시간 동안 다수의 측점에서 탄성재료의 성능 및 상태를 현재 운영상태에서 궤도성능(궤도지지강성) 및 궤도재료의 내구성능(노후화 수준, 물성변화율 등)을 평가함으로써 시기적절하게 탄성재료를 교체할 수 있으며, 지속적으로 탄성재료의 성능변화(열화)상태를 모니터링 할 수 있어 궤도유지관리에 활용도가 높을 것으로 판단된다.

• 한국노년학
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• 제37권4호
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• pp.835-852
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• 2017

본 연구의 목적은 최저생계비 이하 저소득 노인가구를 대상으로 공적 지원인 국민기초생활보장 수급에서의 배제가 물질적 결핍에 미치는 영향에 있어 사회적 지지가 조절효과를 갖는지 살펴보고자 하는 것이다. 이를 위하여 국가인권위원회가 2014년에 조사한 최저생계비 이하 저소득 가구 실태조사 자료를 사용하여 65세 이상 노인가구 255명의 응답자료를 분석하였다. 자료 분석은 STATA13 통계프로그램을 이용하여 기술통계분석, ANOVA, 상관분석 및 다중회귀분석 등을 실시하였다. 연구결과 전체 응답 노인의 물질적 결핍의 평균 수준은 1.45개로 가장 큰 어려움은 '난방' 및 '의료서비스 이용'에서의 어려움으로 나타났다. 회귀분석 결과, 기초생활보장 수급을 받다가 배제될 경우 수급을 받는 경우에 비해 물질적 결핍을 더 많이 경험하는 것으로 나타났으며, 이 경우 사회적 지지가 높으면 부적(-) 상호작용효과가 발생하여 수급배제가 물질적 결핍에 미치는 정적인(+)효과를 약화시키는 것으로 나타났다. 이와 같은 연구결과를 바탕으로 저소득 노인 가구의 물질적 결핍 수준을 낮출 수 있도록 실천적, 정책적 함의를 제시하였다.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2011년도 추계학술발표대회 논문집
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• pp.137-142
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• 2011

Individual solar cells must be connected together to give the appropriate current and voltage levels and they must also be protected from damage by the environment. [1] PV module consists of a glass/ polymer encapsulation/ solar cell string/ polymer encapsulation/ back sheet. Usually, encapsulation materials is used EVA(ethylene vinyl acetate), PVB(polyvinyl butyral), PO(polyolefin)sheet. This study is about fabrication of module using silicone material instead of above them. We got to know advantage that is fabrication time and efficiency of modules.

• 디지털융복합연구
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• 제16권7호
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• pp.165-175
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• 2018

본 연구는 결혼이주여성들의 삶의 질에 자아존중감의 영향력과 가족지지의 조절효과를 검증하기 위하여 다문화가족지원센터에서 언어 및 직업교육 등을 받는 국제 결혼이주여성들을 대상으로 설문을 실시하여, 그 중 279명을 유효 표본으로 선정하였다. 분석결과는 다음과 같다. 첫째, 결혼이주여성의 자아존중감이 삶의 질에 정(+)의 영향을 미침을 확인하였다. 둘째, 가족지지의 정보적지지는 삶의 질에 유의한 부(-)의 영향을 미치고, 평가적지지, 물질적지지는 유의한 정(+)의 영향을 미치는 것으로 나타났으나, 자아존중감과 상호작용항에서는 정서적지지는 유의한 부(-)의 영향을 미치며, 평가적지지, 물질적지지의 상호작용항은 유의한 정(+)의 영향을 미치는 것으로 나타났다. 그러나 정보적지지의 상호작용항은 삶의 질에 정적인 영향력이 없는 것으로 나타났다. 결국 결혼이주여성들의 삶의 질에 영향을 미치는 핵심 요인은 한국가족이라고 볼 수 있다. 따라서 시댁가족들이 결혼이주여성을 자신의 가족으로 받아들이고 지지를 해주어야 한국에서의 안정인 정착과 더불어 삶의 질이 높아진다고 볼 수 있겠다.

• Corrosion Science and Technology
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• 제9권5호
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• pp.196-200
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• 2010

Recently porous metal has been used as supporting metal in planar type SOFC. In order to search optimum alloys for porous metal support and estimate the stability of metal-supported SOFC at high temperature, it is necessary to investigate the oxidation behaviors of porous material for metal support in comparison with dense material. Oxidation tests of porous and dense stainless steels were conducted at $600^{\circ}C$ and $800^{\circ}C$. Since the specific surface area of porous material is much larger than that of dense material, surface area should be considered in order to compare the oxidation rate of porous stainless steel with that of dense stainless steel. The specific surface area of porous body was measured using image analyzer. The weight gain of porous stainless steel was much greater than those of dense stainless steels due to its larger specific surface area. considering the specific surface area, the oxidation rate of porous stainless steel is likely to be the same as that of dense stainless steel with the same surface area. The change in chromium content in stainless steel during oxidation was also investigated. The experimental result in chromium content in stainless steel during oxidation corresponded with the calculated value. While the change in chromium content in dense stainless steel during oxidation is negligible, chromium content in porous stainless steel rapidly decreases with oxidation time due to its large specific surface area. The significant decrease in chromium content in porous stainless steel during oxidation may affect the oxidation resistance of porous stainless steel support and long term stability of metal-supported SOFC.

• 보존과학회지
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• 제38권1호
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• pp.45-54
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• 2022

This study examined the production technique of bracket murals in Daeungjeon Hall, Gaeamsa Temple by conducting a analysis of their wall structure, material characteristics, and painting layers. Wall was a single-branch structure with support layer, middle layer, finishing layer, and painting layer. The support layer, middle layer and finishing layer, were produced by mixing sand (quartz, feldspars etc.), and loess. The ratio of above medium sand to below fine sand was approximately 0.7 : 9.3 in the support layer, 4 : 6 in the middle layer and 6 : 4 in the finishing layer, which had a more percentage of above medium sand than the support layer. The analysis of the painting layer showed that natural soil pigment was used to establish a relatively ground layer of up to 50 ㎛, and pigments such as Lead sulfate, atacamite and mercury sulfide were painted on top of the layer. This study's results confirmed that the bracket mural paintings in Gaeamsa Temple are within the category of the production style of murals during the Joseon period. However, the points that the middle layer was formed several times, the significant difference in particle size distribution between the wall, and the absence of chopped straw in the support layer are a feature of bracket mural paintings in Gaeamsa Temple. These properties of murals as material and structure may be viewed for correlation with the degree of damage to wall structure of mural painting and would serve as an important reference to diagnosis the conservation conditions of murals or prepare conservation treatments.

• Journal of Electrochemical Science and Technology
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• 제15권3호
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• pp.345-352
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• 2024

The synthesis of Pt nanoparticles and catalytically active materials using the electrochemical top-down approach involves dispersing Pt electrodes in an electrolyte solution containing alkali metal cations and support material powder using an alternating pulsed current. Platinum is dispersed to form particles with a predominant crystallographic orientation of Pt(100) and a particle size of approximately 7.6±1.0 nm. The dispersed platinum particles have an insignificant content of PtO_x phase (0.25±0.03 wt.%). The average formation rate was 9.7±0.5 mg cm^-2 h^-1. The nature of the support (carbon material, metal oxide, carbon-metal oxide hybrid) had almost no effect on the formation rate of the Pt nanoparticles as well as their crystallographic properties. Depending on the nature of the support material, Pt-containing catalytic materials obtained by the electrochemical top-down approach showed good functional performance in fuel cell technologies (Pt/C), catalytic oxidation of CO (Pt/Al₂O₃) and electrochemical oxidation of methanol (Pt/TiO₂-C) and ethanol (Pt/SnO₂-C).