• Nuclear Engineering and Technology
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• 제41권10호
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• pp.1323-1332
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• 2009

The IHX (Intermediate Heat eXchanger) for a pool-type SFR (Sodium-cooled Fast Reactor) system transfers heat from the primary high temperature sodium to the intermediate cold temperature sodium. The upper structure of the IHX is a coaxial structure designed to form a flow path for both the secondary high temperature and low temperature sodium. The coaxial structure of the IHX consists of a central downcomer and riser for the incoming and outgoing intermediate sodium, respectively. The IHX of a pool-type SFR is supported at the upper surface of the reactor head with an IHX support structure that connects the IHX riser cylinder to the reactor head. The reactor head is generally maintained at the low temperature regime, but the riser cylinder is exposed in the elevated temperature region. The resultant complicated temperature distribution of the co-axial structure including the IHX support structure may induce a severe thermal stress distribution. In this study, the structural feasibility of the current upper support structure concept is investigated through a preliminary stress analysis and an alternative design concept to accommodate the IHTS (Intermediate Heat Transport System) piping expansion loads and severe thermal stress is proposed. Through the structural analysis it is found that the alternative design concept is effective in reducing the thermal stress and acquiring structural integrity.

• The Journal of Asian Finance, Economics and Business
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• 제9권1호
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• pp.325-332
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• 2022

The aim of this research is to use a conceptual model to experimentally evaluate the mediating impact of government financial and training support on structural social capital and non-financial performance of family farms. Questionnaires were used to collect data from family farms in Guangxi, China, from August 25^th to September 8^th, 2021. There were 759 valid responses, accounting for 94.99 percent of the total number of respondents. The scales' reliability and validity, and the research's mediating effects and hypotheses, are tested using SPSS 22.0 and AMOS 26.0. The findings suggest that the impact of government financial assistance on family farms' non-financial performance cannot be substantiated. The intermediary chain connection of financial and training support, on the other hand, has a significant mediating effect between structural social capital and family farm non-financial performance. Direct financial assistance could be thought to encourage family farms to rely too much on funding, making them less competitive in market competition, innovation, and long-term operations. According to the conclusions of the study, government assistance to family farms could take a variety of forms, including providing diversified skills training programs in farming practices, managerial skills, and other areas.

• 가정과삶의질연구
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• 제31권5호
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• pp.125-141
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• 2013

This research aims to integrate study results through a meta-analysis of previous studies on the variables related with social support for female marriage immigrants. Based on the results, this study established the foundation of an integrated social support system for female marriage immigrants which considers both the functional perspective and structural perspective of social support, and suggested plans for an efficient support system. All social support was positively associated with female marriage immigrants marriage life, child-rearing behavior and attitude, reduction of stress and depression and psychological stability. In relation to the effect size of each variable related with all social support, the marriage variable had the biggest relationship with it, followed by the parenting variable, the psychological variable and the stress variable in that order. With reference to the relationship with related variables according to the sub-domain of social support, from the structural perspective, spousale support showed a high relationship with the marriage variable and the stress variable. It was also especially, very highly related with the marriage variable. In addition, a married woman's family support and expert support had an intermediate relationship with the marriage variable, and the husband's family support and friend support had a low relationship with it. From the functional perspective, material support had a very high relationship with the marriage variable, whereas it had a low relationship with the stress variable and the psychological variable. Emotional support was also highly related with marriage variable, but showed an intermediate or low relationship with the psychological variable and the stress variable. On the other hand, informational support displayed an intermediate relationship with the stress variable and the psychological variable, and a high relationship with the marriage variable. Lastly, evaluative support had a high relationship with the marriage variable and the psychological variable. Based on these results, this study proposed plans for an integrated social support system as follows. First, education ought to be provided for the spouses, and support for marital adjustment should be offered. Second, there plans should be made for continuous bonding with the family of origin, and support should be given to address changes in awareness of the relationship with the husband's parents. Third, it is required to revitalize the local community and self-help groups, and provide the female marriage immigrants with opportunities to participate in social activities.

• 한국콘텐츠학회논문지
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• 제20권8호
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• pp.285-297
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• 2020

본 연구는 간호대학생의 대인관계문제와 우울관계에서 온라인 및 오프라인 사회적 지지의 조절효과를 파악하기 위하여 구조모형 분석을 이용한 서술적 조사연구이다. 본 연구는 간호대학생 264명을 대상으로 설문조사를 시행하였다. 수집된 자료는 SPSS 25.0과 Smart PLS 3.0을 활용하여 탐색적 요인분석, 확인적 요인분석, PLS-SEM(Partial Least Square Structural Equation Model)을 사용하여 분석하였다. 연구결과 대인관계문제와 온라인 사회적 지지가 우울 증가에 유의미한 영향을 미쳤으며 오프라인 사회적 지지가 우울감소에 유의한 영향을 미쳤다. 그리고 대인관계문제와 우울과의 관계에서 오프라인 사회적 지지만이 조절효과에 유의한 것으로 나타났다. 따라서 간호대학생의 대인관계문제로 인한 우울 감소를 위해 오프라인 사회적 지지가 적극적으로 제공되어야 하며, 온라인 사회적 지지의 조절효과를 확인하기 위해 SNS를 통한 인간관계유형 등 관련 변수를 포함함 반복 연구를 제안한다.

• 한국간호교육학회지
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• 제17권3호
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• pp.365-375
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• 2011

Purpose: This study aimedto develop a structural equation model on the relationship among ego-resilience, and teaching effectiveness on clinical education, stress coping style, perceived family support, and satisfaction of clinical practice in nursing students in order to increase the satisfaction of clinical practice. Methods: The subjects were 399 undergraduate nursing students enrolled in 7 universities and participating in 10 clinical practice setting areas in 5 cities in South Korea. The research was conducted from December 5th, 2009 to February 20th, 2010. The structural equation model was used to perform the analysis with the statistics program of SPSS win 17.0 and AMOS 5.0. Results: Teaching effectiveness and family support showed a direct effect on satisfaction of clinical practice, while ego-resilience and stress coping styles showed an indirect effect. The biggest total effect on satisfaction of clinical practice was teaching effectiveness followed by family support, ego-resilience, and stress coping styles respectively, which accounted for 50.9%. Conclusion: Based on outcomes of this study, the proposed model allows better understanding of the satisfaction of clinical practice. This result implies that strategies or intervention programs enhancing extrinsic protection factors, motivation factors, and intrinsic protection factors should be considered. In addition, a structural support system for increasing the satisfaction level of clinical practice in nursing students should also be considered.

• 대한간호학회지
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• 제45권1호
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• pp.97-106
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• 2015

Purpose: This study was done to develop and test a structural model for caregiving experience including caregiving satisfaction and caregiving strain in families providing care for family members with a mental disorder. Methods: The Stress-appraisal-coping model was used as the conceptual framework and the structural equation model to confirm the path that explains what and how variables affect caregiving experience in these families. In this hypothesis model, exogenous variables were optimism, severity of illness and uncertainty. The endogenous variables were self efficacy, social support, caregiving satisfaction and caregiving strain. Data were collected using structured questionnaires. Results: Optimism and caregiving self-efficacy had significant direct and indirect effects on caregiving satisfaction. Optimism, severity of illness and uncertainty had significant direct and indirect effects on caregiving strain. The modified path model explained effects of optimism on caregiving self-efficacy with social support in the path structure as a mediator. Also, there were direct and indirect effects of optimism and uncertainty on caregiving satisfaction with social support and caregiving self-efficacy in the path structure as a mediators. Conclusion: Results suggest the need to improve caregiving self-efficacy of these families, establish support systems such as a mental health professional support programs for caregiving self-efficacy. Optimism, severity of illness and uncertainty perceived by families need to be considered in the development of support programs in order to increase their effectiveness.

• Structural Engineering and Mechanics
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• 제25권5호
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• pp.631-636
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• 2007

• Wind and Structures
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• 제27권1호
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• pp.41-57
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• 2018

Concentrated Solar Photovoltaic (CPV) is a promising alternative to conventional solar structures. These solar tracking structures need to be optimized to be competitive against other types of energy production. In particular, the selection of the structural parameters needs to be optimized with regards to the dynamic wind response. This study aims to evaluate the effect of the main structural parameters, as selected in the preliminary design phase, on the wind response and then on the weight of the steel support structure. A parametric study has been performed where parameters influencing dynamic wind response are varied. The study is performed using a semi-deterministic time-domain wind analysis method. Unsteady aerodynamic model is applied for the shape of the CPV structure collector at different configurations in conjunction with a consistent mass-spring-damper model with the corresponding degrees of freedom to describe the dynamic response of the system. It is shown that, unlike the static response analysis, the variation of the peak wind response with many structural parameters is highly nonlinear because of the dynamic wind action. A steel structural optimization process reveals that close attention to structural and site wind parameters could lead to optimal design of CPV steel support structure.

• 한국지능시스템학회논문지
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• 제21권5호
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• pp.618-623
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• 2011

본 논문에서는 구조 정보를 활용하기 위한 결합 커널 기반의 의미 있는 웹 테이블과 장식 웹 테이블을 구분하는 새로운 방법을 제안한다. 본 논문에서 테이블의 구조 정보는 두 가지 형태의 구문 분석 트리로부터 추출된다. 컨텍스트 트리는 테이블 주변에 나타난 구조를 반영하고 있으며, 테이블 트리는 테이블 내의 구조를 담고 있다. 두 트리로 표현되는 테이블의 구조 정보를 효과적으로 다루기 위해 파스 트리 커널 기반의 결합 커널을 제안한다. 제안한 결합 커널을 적용한 support vector machines은 풍부한 구조 정보를 활용하여 의미 있는 테이블과 장식 테이블을 분류한다.

• Smart Structures and Systems
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• 제12권3_4호
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• pp.327-344
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• 2013

Beam string structure (BSS) is introduced as a new type of hybrid prestressed string structures. The composition and mechanics features of BSS are discussed. The main principles of wavelet packet transform (WPT), principal component analysis (PCA) and support vector machine (SVM) have been reviewed. WPT is applied to the structural response signals, and feature vectors are obtained by feature extraction and PCA. The feature vectors are used for training and classification as the inputs of the support vector machine. The method is used to a single one-way arched beam string structure for damage detection. The cable prestress loss and web members damage experiment for a beam string structure is carried through. Different prestressing forces are applied on the cable to simulate cable prestress loss, the prestressing forces are calculated by the frequencies which are solved by Fourier transform or wavelet transform under impulse excitation. Test results verify this method is accurate and convenient. The damage cases of web members on the beam are tested to validate the efficiency of the method presented in this study. Wavelet packet decomposition is applied to the structural response signals under ambient vibration, feature vectors are obtained by feature extraction method. The feature vectors are used for training and classification as the inputs of the support vector machine. The structural damage position and degree can be identified and classified, and the test result is highly accurate especially combined with principle component analysis.