• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 춘계학술대회 논문집
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• pp.496-500
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• 1997

This paper describes an automated system for analyzing the stress intensity factors(SIFs) of three-dimensional (3D) cracks. A geometry model, i.e.a solid containing one or several 3D cracks is defined. Several distributions of local node density are chosen, and then automatically superposed on one another over the geometry model by using the fuzzy knowledge processing. Nodes are generated by the bucketing method, and ten-noded quadratic tetrahedral solid elements are generated by the Delauuay triangulation techniques. The singular elements such that the mid-point nodes near crack fornt are shifted at the quarter-points are automatically placed along the 3D crack front. THe complete finite element (FE) model generated, i.e the mesh with material properties and boundary conditions is given to one of the commercial FE codes, and a stress analysis is performed. The SIFs are calculated using the displacement extrapolation method. To demonstrate practical performance of the present system, a semi- elliptical surface crack in a plate subjected to tension is solved.

• 항공우주시스템공학회지
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• 제10권1호
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• pp.51-58
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• 2016

In this paper, we present some results on No-failure accelerated life test of aerial vehicle for reliability demonstration. The design of general accelerated life test consists of the three phases: 1) Estimating normal life test time of a single product from Weibull distribution model; 2) Determining the acceleration factor (AF) by utilizing the relation between the life of mechanical components and the applied torque; 3) Calculating the accelerated life test time, which comes from dividing the estimated normal life test time into AF. Then, we applied the calculated life test time to the real reliability test of the flap actuating system, while considering the requirement specification for mechanical components and operating environment of the actuation system. Real experimental processes and results are presented to validate the theory.

• The Journal of Asian Finance, Economics and Business
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• 제7권7호
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• pp.269-277
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• 2020

Bao Loc City is the new tourism destination in Lam Dong province, Vietnam, where more and more tourists have been drawn to pay a visit. This study aims to test the correlative impact of tourism service quality factors on satisfaction of the tourists who have visited Bao Loc City. The key theory used in this study is SERVQUAL scale. The survey sample consists of 350 tourists who stayed overnight in Bao Loc City in the last quarter of 2019; 315 valid survey questionnaires could be used for the analysis. The research applied Cronbach's Alpha, exploratory factor analysis (EFA), confirmatory factor analysis (CFA), structural equation modeling (SEM), and bootstrap test. The results show that the satisfaction of the tourists who have visited Bao Loc City has been affected statistically by three factors: (1) Responsiveness; (2) Reliability; and (3) Empathy, which were ranked by descending importance. Surprisingly, the research found that Tangibles and Assurance do not have an impact on tourists' satisfaction towards Bao Loc City. The research formulates some suggestions to the city policy-makers and the tourism businesses management in Bao Loc City in order to enhance tourists' satisfaction through improving the tourism service quality at Bao Loc City.

• 한국사회복지학
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• 제47권
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• pp.34-70
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• 2001

Little empirical study has been conducted concerning family resilience of family of children with disabilities. The purpose of this study is to examine the variables that may influence the level of family resilience and family resilience level of family of children with disabilities. This study used the sampled of 363 family of children with disabilities selected from 17 community rehabilitation centers. The measurement of family resilience composed of the base of Walsh(1998)'s theory. And using confirmatory factor analysis, it was confirmed that the scale has three factor such as belief system, organizational pattern and communication process. This study showed that using 5 points scale, mean of belief system is 3.62. And mean of organizational pattern is 3.38 and mean of communication process is 3.73. In identifying predictor of the family resilience, this study used variables from the following aspects: perspective of disability of children, intra-aspect of family, extra-aspect of family. Using Regression analysis, it was found that attitude of family of disability and spouse relationship influenced all sub-aspect of family resilience. Specially, helping of professional influenced belief system, accept of disability influenced organizational pattern. And positive expectation of family of disability influenced communication process. This finding give us significant practical implications for social work intervention & the direction of future research in family resilience.

• 조명전기설비학회논문지
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• 제22권5호
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• pp.64-72
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• 2008

3상 4선식 전원공급에서 부하의 불평형 운전에 의한 전압 불평형은 전류 불평형을 일으켜 기기의 손실증가에 따른 출력 감소로 전원용량을 증가시키는 것은 물론이고 전기 품질에도 나쁜 영향을 미치고 있다. 전력용 커패시터는 유도성 부하의 역률 보상과 전원을 안정시키기 위해 사용되며, 유도전동기의 여자에 필요한 자화성분을 전원을 대신하여 제공하기도 한다. 전압 불평형이 지속될 경우 커패시터에 전압 스트레스로 작용하여 절연 고장을 일으킬 수 있다. 본 논문에서는 역률 개선용 커패시터가 전압 불평형 증가에 의해 받는 영향을 해석한 결과 전압 및 전류의 크기가 함께 증가하여 스트레스는 점차적으로 높아진다는 것을 확인할 수 있었다.

• The Journal of Asian Finance, Economics and Business
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• 제8권7호
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• pp.647-655
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• 2021

Job crafting refers to changes that individuals make in their work to achieve their preferences and needs. Contingent on the social exchange theory, the aim of this study is to explore the relationship between job crafting and job performance. In addition, the study examines the mediating effect of social capital in the relationship between job crafting and job performance. The data was collected from 387 employees in Vietnamese industrial enterprises through a questionnaire survey using both qualitative and quantitative methods. The information was then analyzed by explanatory factor analysis (EFA) confirmatory factor analysis (CFA) as well as structural equation modeling (SEM). The results show that all three dimensions of job crating positively affect job performance and that social capital plays a mediating role in that relationship. This study contributes to the field of human resources management, particularly job crafting, by examining different dimensions of job crafting that impacts job performance. Moreover, this is the first study to test the mediating role of social capital on the relationship between job crafting and job performance. These insights may help the organizational managers to encourage beneficial job crafting.

• 한국간호교육학회지
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• 제18권2호
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• pp.229-238
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• 2012

Purpose: The purpose of this study was to evaluate the theory of planned behavior (TPB) in the structural relationship of nursing students' performance related to nosocomial infection control (NIC). Method: Data was collected by using a questionnaire completed by 238 nursing students of three nursing colleges in Suwon, Sokcho. Results: The mean score of performance related to NIC was 3.86. The highest mean score of performance related to NIC was 4.18 (${\pm}0.91$) for 'hand washing' and the lowest mean score was 3.56 (${\pm}1.08$) for 'respiratory system'. In prediction of the intention of nursing students' on NIC, the attitude, the subjective norm, and the perceived behavior control(PBC) of TPB resulted in statistically significant influencing factors (p<0.050). These three variables explained 47.6% of the total variance of the intention of nursing students' on NIC. In predicting the performance related to NIC, the PBC resulted in the direct and main influencing factor of nursing students' performance related to NIC (p<0.010). Intention was not a significant determinant. These two variables explained 13.2% of total variance of the performance related to NIC. Conclusion: This study shows the TPB model's applicability in explaining performance related to NIC of nursing students and highlights the importance of PBC for strategies to enhance performance related to NIC in nursing students.

• 대한가정학회지
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• 제39권2호
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• pp.131-146
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• 2001

The main purpose of this study, based on implicit personality theory and attribution theory, was to examine whether there exist the physical attractiveness stereotype, "what is beautiful is good," in the present Korea, and if exist, what is the content of it. The index of the physical attractiveness of this study was the facial attractiveness judged by 30 female university students. The appropriateness of clothing was manipulated by 4 types of clothing perceived appropriate for two assumed situations by female university students. Three female faces having high, medium, and low attractiveness were simulated with the same body dressed four types of clothing using CAD system, and a total of 12 stimulus persons were created. A total of 524 male and female(262 of male, 262 of female) university students from 3 universities in Kwangju, Korea were participated as subjects in this study. The design for the experiment was a 3$\times$4$\times$2 randomaized factorial, with three levels of facial attractiveness (high, medium, low), and four types attire(formal-masculine, formal-feminine, casual-masculine, casual-feminine), two kinds of context (job interview, dating) in which perceptions were occurred. The data were analysed using factor analysis, MANOVA, t-test and Duncan test. The results were as follows: 1. The facial attractiveness exerted significant positive effects on the evaluation of sociability, adjustment, and potency of her in both of two assumed situations (p<.001, respectively). 2. The appropriateness of stimulus person′s clothing had significant positive erect on the evaluation of sociability of stimulus person in dating context(p<.001). 3. The gender of subjects did not influenced the trait evaluations in both of two assumed situations.

• 영재교육연구
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• 제26권1호
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• pp.141-159
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• 2016

본 연구는 영재성이라는 학습자 특성에 따라 수학학습동기를 비교하고, 수학학습동기, 수학인지 및 정의적 특성과의 관계를 알아보는 것을 목적으로 한다. 이를 위해 첫째, 영재학생과 일반학생을 대상으로 수학학습동기, 수학 정의적 특성, 수학 학업성취도의 차이가 있는지 알아보았다. 둘째, 수학학습동기, 수학 정의적 특성, 수학 학업성취도 간 관계를 살펴보았다. 특히, 수학학습동기에 있어서는 Keller(1983)의 ARCS 이론을 기반으로 학습자의 수학학습동기를 분석하였다. 초등학교 5학년 영재학생과 일반학생을 대상으로 연구한 결과, 영재학생과 일반학생의 수학학습동기, 수학 정의적 특성, 수학 학업성취도에서 차이가 나타남으로 세 요소 모두 영재학생이 높은 것으로 나타났다. 또한 수학 정의적 특성, 수학 학업성취도는 수학학습동기와 모두 상관관계가 있었고, 수학 정의적 특성과 수학 학업성취도도 상관관계가 있어 수학교육에의 시사점을 보인다.

• 한국조경학회지
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• 제34권5호
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• pp.1-13
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• 2006

The Attention Restoration Theory (ART) developed by Kaplan and Kaplan proposes that effortful directed attention required in normal life can be fatigued. Restoration can occur in a setting that has restorative qualities. The restorative quality described by the ART involves four concepts: being away, fascination extent, and compatibility. The purpose of this study was to investigate how the restorative quality of landscape influenced the preferences and satisfaction of visitors to an heritage landscape. Four kinds of heritage landscapes of Kyongju were used as environmental surrogates and 150 americans participated in the study. Hartig et al.'s Revised Perceived Restorativeness Scale (RPRS) was used as the psychological measure for the restorative quality, along with other measurement constructs such as cultural uniqueness and novelty. The results showed that RPRS was a reliable measurement tool for assessing the restorative quality of artificial landscapes. Factor analysis identified three valid factors: escape-fascination compatibility, anti-extent. Among the three factors, only two, escape-fascination and compatibility, were found to have important effects on visiting preference and satisfaction. Specifically, higher levels of preference and satisfaction were associated with higher levels of escape-fascination and compatibility. The results indicate that the restorative quality has a high possibility to be used as a frame of reference for assessing various types of landscapes, from natural to artificial. It was also proposed that restorative quality could better explain the experience of the landscape strongly related to specific purpose or motivation.