• Journal of Korean Society of Steel Construction
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• v.19 no.4
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• pp.383-393
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• 2007

A simplified model which incorporates the moment-axial tension interaction of the double-span beams in a column-removed steel frame is presented in this paper. To this end, material and geometric nonlinear parametric finite element analyses were conducted for the double-span beams by changing the beam span to depth ratio and the beam size within some practical ranges. The beam span to depth ratio was shown to be the most influential factor governing the catenary action of the double-span beams. Based on the parametric analysis results, a simplified piece-wise linear model which can reasonably describe the vertical resisting force versus the beam chord rotation relationship was proposed. It was also shown that the proposed method can readily be used for the energy-based progressive collapse analysis of steel moment frames.

• Nutritional Sciences
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• v.9 no.1
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• pp.35-41
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• 2006

It should be concerned to the women with mutated genotype of methylenetetrahydrofolate reductase (MTHFR), C677T or A1298C, since they need more folate than those with wild genotypes. In this study, we evaluated the folate status of Korean women of childbearing age according to their MTHFR polymorpiysm. Dietary folate intakes, plasma and erythrocyte folate concentrations, plasma homocysteine concentrations, and urinary excretions of para-aminobenzoylglutamate (pABG) and para-acetoamidobenzoylglutamate (ApABG) of twenty-five subjects aged between 19 and 35 years old were determined Folate intakes seemed to be inadequate, being only three-quarters of the Korean RDA of folate. More than one-quarter of the subjects was exposed to folate deficiency risk as determined by erythrocyte folate concentration and almost one-quarter of the subjects showed hyperhomocysteinemia, although they had normal plasma folate concentrations. Urinary excretions of pABG and ApABG seemed to be low and ApABG constituted more than $85\%$ of total folate catabolites. There were no significant differences in dietary folate intakes, plasma concentrations of folate and homocysteine, and urinary excretions of pABG and ApABG among the geneotypes of both C677T and A1298C. However, the subjects with 1298AC genotype had significantly lower erythrocyte folate concentration than those with 1298AA. Erythrocyte folate concentration showed an inverse relationship with plasma homocysteine concentration and positive relationships with urinary excretions of pABG and ApABG. The results of this study imply that mutations of 677C$\rightarrow$T and 1298A$\rightarrow$C in the study were not associated with decreased plasma folate and raised plasma homocysteine concentrations. A1298C polymorphism night be, however, more influential on erythrocyte folate concentration than C677T polymorphism, and urinary excretions of folate catabolites, pABG and ApABG, might be reliable indexes of folate nutritional status like plasma homocysteine concentrations.

• Journal of Korean language education
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• v.28 no.3
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• pp.85-104
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• 2017

The purpose of this study is to explore the effects of listening comprehension ability, self-efficacy, comprehension anxiety, and exposure time on Korean language understanding. In order to achieve our goal, listening examinations and surveys were conducted among 95 students from a university in Thailand, studying Korean language. As a result, it was revealed that the most influential factor on one's listening ability was self-efficacy. In addition, when the correlation between listening self-efficacy and other factors was examined, it was shown that there existed a statistically significant relationship. Particularly, listening comprehension anxiety had the most significant correlation with listening self-efficacy. Similarly, cognitive strategy demonstrated a significant correlation with listening self-efficacy. On the other hand, the effects of self-efficacy and other factors on listening scores such as the degree and types of strategy that students used were also studied. The findings revealed that, in most cases, strategy-intensive group's test results were influenced more by exposure time, while the less intensive group's scores were influenced more by their self-efficacy. Finally, after analyzing the effects of time spent on conversing with friends and watching Korean television on listening self-efficacy, it was discovered that both factors had statistically significant relationships with listening self-efficacy. Through this study, such results can be integrated and applied to education in various ways. The most important part for listening comprehension ability is enhancing self-efficacy and in order to do so, the appropriate education methods should be used to reduce listening comprehension anxiety, stimulate strategy use, and increase listening exposure time.

• Korean Journal of Social Welfare Studies
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• v.49 no.3
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• pp.61-86
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• 2018

This study set out to investigate relationship between job satisfaction and marital satisfaction and especially mediating effect of partner abuse. Data came from Korea Welfare Panel Survey 2017. The final sample size was 2,610 married employed persons in South Korea. Analysis methods were multiple regression analysis. The major findings of this study are as follows. First, higher job satisfaction influenced directly higher marital satisfaction, and influenced also indirectly through lower partner abuse. Second, married employed women showed lower level of marital satisfaction than married employed men. Third, married employed women's job satisfaction was more influential factor to explain marital satisfaction than married employed men's. The limitations and implications of the findings from this study were discussed with respect to further studies.

• Journal of Convergence for Information Technology
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• v.9 no.10
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• pp.195-202
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• 2019

This study aimed to investigate the effects of positive psychological capital on college life adaptation in freshmen of dental hygiene department of universities in Daegu, Busan and Ulsan. The major variables including hope, resilience, optimism, self-efficacy, academic adaptation, social adaptation, personal emotional adaptation, and university environment adaptation all showed significant positive correlations. Among the influential factors of positive psychological capital on college life adaptation, academic adaptation and social adaptation showed significant differences in optimism(p<.001) and self-efficacy(p<.001), while personal emotional adaptation and university environment adaptation showed significant differences in optimism(p<.001). Therefore, it is necessary to develop intervention programs that can improve positive psychological capital and apply them systematically to the educational field.

• Journal of the Korean Society for Railway
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• v.18 no.6
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• pp.609-618
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• 2015

This paper empirically analyzed the effect that the leadership of middle managers had on empowerment and innovative behavior, as measured by employees of a domestic railway corporation. The results demonstrate that transactional leadership had a positive effect on both empowerment and innovative behavior. However, transformational leadership did not exhibit immediate effects on innovative behavior. In addition, it was also found that empowerment completely mediated the relationship between transformational leadership and innovative behavior. Therefore, the results of this study imply that the leadership of middle managers in a railway corporation is an important influential factor which causes innovative behavior in employees. Specifically, to induce voluntary innovative behaviors in employees through transformational leadership, utilizing empowerment to instill a right to make decisions through the delegation of the right is a very important factor.

• Journal of Digital Convergence
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• v.19 no.12
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• pp.133-143
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• 2021

Complicated political situation still plagues charter schools despite their innovative education. Nevertheless, they experienced growth around 2011, yet only a few studies have explored why they had expanded from the political viewpoints. Therefore, using political institutions and political market framework, this study investigated the relationship between political institutions and charter school growth in the US(United States). To do so, this study conducted multiple regression analyses of school growth measured by the number of schools allowed, implementation points, and guaranteed funding. The findings revealed that only governors' partisanship has a significant influence on the number of schools. Moreover, supportive privatization organizations, governors' partisanship, and per capita income affects implementation points. Meanwhile, regarding guaranteed fiscal funding for the charter schools, the teachers' union enrollment rate, governors' partisanship, and per capita income are crucially influential. Finally, the results confirmed that political institutions are also important for education.

• Journal of the Korea Convergence Society
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• v.12 no.7
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• pp.349-359
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• 2021

This study was aimed to investigate the factors influencing COVID-19 practice of COVID-19 knowledge, COVID-19 attitude, COVID-19 perceived risk among adolescents. A descriptive study design was used. Participants were 164 high school students in D and K city. The data were collected from October 26 to November 6 2020. Collected data were analyzed by t-test, one-way ANOVA, Pearson's correlation coefficient, multiple regression using SPSS WIN 21.0 program. Results: The influential factor for COVID-19 practice was COVID-19 attitude (β=0.28, p<.001). It was found that satisfaction with peer relationship (β=-0.05, p=.493), economic status (β=-0.08, p=.270), subjective health status (β=-0.06, p=.438), COVID-19 knowledge (β=0.04, p=.571), COVID-19 perceived risk (β=0.05, p=.126) had no significant effect on COVID-19 practice. In order to develop a program to increase the COVID-19 practice for youth, it is necessary to prepare a plan to improve the attitude of COVID-19.

• Research in Community and Public Health Nursing
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• v.29 no.4
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• pp.393-403
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• 2018

Purpose: The purpose of this study is to examine depression levels of some Korean mothers of preschool children and to find out how much influence their psychological, parenting and relational characteristics have on their depression. Methods: This study has been conducted to analyze depression-related and -influencing factors of the Korean mothers of preschool children [7th Panel Study of Korean Children (2014)]. Correlation analysis has been used to examine the relationship between the mothers' psychological, parenting and relational factors and their depression. Hierarchical analysis has been employed to clarify the factors associated with depression. Results: Hierarchical regression analysis has found out that the significant predictors of the depression of the Korean mothers of preschool children include age, educational and employment status, monthly income, smoking status in Model 1. The significant variable is self-esteem in Model 2, parenting stress in Model 3, and, lastly, marital conflict in Model 4. Conclusion: Through this study, it has been discovered that the psychological characteristics of the Korean mothers of preschool children are the most influential factor affecting their depression. The results suggest that it is necessary to develop a community program for improving self-esteem and reducing parenting stress of Korean mothers of preschool children in their parenting.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.1
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• pp.152-161
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• 2019

This study analyzed the relationship of turnover intention of clinical nurses with self-leadership, job involvement, and empowerment. The participants were 173 clinical nurses working in D city and K province in Korea. Data analysis consisted of independent t-tests, ANOVA, Scheffe's tests, Pearson's correlations, and stepwise multiple regression conducted using SPSS WIN 21.0. There was a significant correlation between self-leadership, job involvement, empowerment and turnover intention. Factors affecting turnover intention were total clinical career, position, salary, marital status and job involvement. Total clinical career was the most influential factor, with an explanatory power of 28.7%. Based on the results, it is necessary to reduce turnover intention of nurses through the development of educational programs to increase job involvement and reorganization of the hospital organization system to manage nursing manpower resources efficiently.