• Structural Engineering and Mechanics
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• v.34 no.1
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• pp.85-95
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• 2010

In this paper, numerical solution of the singular integral equation for the multiple curved branch-cracks is investigated. If some quadrature rule is used, one difficult point in the problem is to balance the number of unknowns and equations in the solution. This difficult point was overcome by taking the following steps: (a) to place a point dislocation at the intersecting point of branches, (b) to use the curve length method to covert the integral on the curve to an integral on the real axis, (c) to use the semi-open quadrature rule in the integration. After taking these steps, the number of the unknowns is equal to the number of the resulting algebraic equations. This is a particular advantage of the suggested method. In addition, accurate results for the stress intensity factors (SIFs) at crack tips have been found in a numerical example. Finally, several numerical examples are given to illustrate the efficiency of the method presented.

• Composites Research
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• v.26 no.4
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• pp.235-244
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• 2013

A volume integral equation method (VIEM) is introduced for the solution of elastostatic problems in an unbounded isotropic elastic solid containing multiple isotropic elliptical fibers of arbitrary orientation subject to uniform stress at infinity. The fibers are assumed to be long parallel elliptical cylinders composed of isotropic elastic material perfectly bonded to the isotropic matrix. The solid is assumed to be under plane strain on the plane normal to the cylinders. A detailed analysis of the stress field at the matrix-fiber interface for square and hexagonal packing of the fibers is carried out for different values of the number, orientation angles and concentration of the elliptical fibers. The accuracy and efficiency of the method are examined through comparison with results obtained from analytical and finite element methods.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.19 no.1
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• pp.98-108
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• 2012

Purpose: This study was done to examine differences in the factors affecting Hwa-byung symptoms in middle-aged men and women. Method: There search design for this study was a descriptive survey design using a convenience sampling. Data collection was done using self-report questionnaires with 381 middle age people (169 men and 212 women) in Seoul and G city. ANOVA, t-test, Pearson correlation coefficients and stepwise multiple regression were used to analyze the data with SPSS Win 18.0 Program. Results: There were significant differences in Hwa-byung symptoms and life stress between men and women. However anger rumination and mood states were not significantly different by gender. In multiple regression analysis, mood states, religion, and employment were significant predictors and explained 36% of Hwa-byung symptoms for men. In women, mood states, life stress, anger rumination and employment were significant predictors and explained 41% of Hwa-byung symptoms. Conclusion: Findings of this study provide a comprehensive understanding of Hwa-byung symptoms and related factors between men and women in Korea. However, further study with a larger random sample from various living environment is necessary.

• Korean Journal of Human Ecology
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• v.4 no.1
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• pp.11-25
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• 2001

The purpose of this study was to examine which of the variables were associated with generative fathering. The subject of the study is consist of 229 fathers who have 4∼6 years old in chonju. The data was gathered through questionnaires. The statistical analysis for this study were frequency. T-test. correlation. Anallysis of Variance(ANOVA), Multiple Regression. Cronbach's Alpha was used to test the reliability of the scales. The major results were as follows : First, there were no significant child's sex and birth in generative fathering. Second. there were significant father's job, income of home and type of family but there were no significant paternal education, father's age and where or not the mother works outside the home in generative fathering. Third. generative fathering was positively correlated with paternal childhood experience. paternal marital satisfaction and father's job satisfaction. Fourth, generative fathering was negatively correlated with parenting stress. Fifth, there were significant differences according to sex-role identity of father in generative fathering that is, generative fathering had more participation and responsibility when father had androgynous or feminine identity than when they had masculine or undifferentiated. Sixth, in multiple regression analysis, generative fathering was predicted significantly by paternal childhood experience, father's sex-role identity. paternal job satisfaction and parenting stress.

• Journal of Korean Academy of Nursing
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• v.41 no.6
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• pp.733-741
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• 2011

Purpose: The purpose of this study was to identify factors influencing maternal identity of Korean primiparas. Methods: The data were collected by a self-report questionnaire in 2006. The participants were 210 healthy primiparous women who delivered at one of three medical centers and revisited the outpatient department for follow up between 4 to 6 weeks after childbirth. Data were analyzed using the SPSS WIN 17.0 program with descriptive statistics, t-test, one way ANOVA, Pearson correlation coefficient, and stepwise multiple regression. Results: Maternal identity was significantly correlated with Taekyo accomplishment, the culturally based prenatal preparation (p<.001). Transitional gratification to motherhood (p<.001), postpartum depression (p<.001), childcare stress (p<.001), infant temperament (p<.001), and social support (p<.001) were also significantly correlated with maternal identity. The stepwise multiple regression analysis showed that maternal identity was significantly predicted by transitional gratification to motherhood, infant temperament, childcare stress, and Taekyo accomplishment. These variables explained 31.0% of the variance of maternal identity. Conclusion: The results of this study suggest that postpartum nursing interventions to promote maternal identity should focus on reinforcing education and support for reducing childcare stress and infant difficulty, and increasing transitional gratification to motherhood. Also, prenatal encouragement and education for improving Taekyo accomplishment may be helpful to promote maternal identity after birth.

• BMB Reports
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• v.45 no.5
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• pp.293-298
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• 2012

The p38 mitogen-activated protein kinase (MAPK) is involved in various processes, including stress responses, development, and differentiation. However, little information on p38 MAPK in insects is available. In this study, a p38 MAPK gene, $Accp38b$, was isolated from $Apis$ $cerana$ $cerana$ and characterized. The quantitative real-time PCR (Q-PCR) analysis revealed that $Accp38b$ was induced by multiple stressors. Notably, the expression of $Accp38b$ was relatively higher in the pupae phase than in other developmental phases. During the pupae phase, Accp38b expression was higher in the thorax than in the head and abdomen and higher in the fat body than in the muscle and midgut. Immunohistochemisty showed significant positive staining of Accp38b in sections from the brain, eyes, fat body, and midgut of $A.$ $cerana$ $cerana$. These results suggest that Accp38b may play a crucial role in stress responses and have multiple aspects function during development.

• Research in Community and Public Health Nursing
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• v.25 no.2
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• pp.128-136
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• 2014

Purpose: The purpose of this study was to investigate factors associated with perceived job satisfaction of TB control nurses in Korea. Methods: This study employed a descriptive survey research design using data for 189 TB control nurses. Variables included in this study were demographic, social, and work-related characteristics (including job stress), and job satisfaction. ANOVA, t-test,and multiple regression analyses were performed using SPSS/WIN 19.0 program. Results: The mean value of perceived job satisfaction was lower in the subjects ($2.9{\pm}0.41$) than in general nurses working in other departments. In multiple regression analysis, factors associated with TB control nurses' job satisfaction were job stress (${\beta}$=-.281, p<.001), marital status (${\beta}$=-.229, p<.001), and the number of TB control nurses employed (${\beta}$=.200, p<.001). Conclusion: The results of this study showed that job satisfaction was associated more significantly with job-related characteristics than with non-job-related variables in workplace. Along with increased TB control nurse staffing, efforts should be made to reduce negative work-place issues such as job stress and inappropriate pay to improve the subject's job satisfaction.

• Korean Journal of Occupational Health Nursing
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• v.26 no.4
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• pp.261-272
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• 2017

Purpose: The study aimed to identify factors influencing work-life balance in female service workers. Methods: A cross-sectional descriptive study was conducted with an online survey of 234 service workers using volunteer panels. Data were collected using a self-administered questionnaire from July 16 to 24, 2017. Major variables included work-life balance, resilience, emotional intelligence, job stress, and fatigue. Using the SPSS 24.0 program, descriptive statistics, t-test, ANOVA, correlation analysis, and multiple regression analysis were conducted. Results: The mean score of the work-life balance level of female service workers was $2.9{\pm}0.85$ on a total score of 6. A multiple regression analysis revealed that smoking, resilience, job stress and fatigue were statistically significant factors in the model (p<.001), with an explanatory power of 50.3%. Emotional intelligence was not significantly associated with work-life balance. Conclusion: The level of work-life balance was considerably low in female service workers. This study suggests that nursing interventions to enhance work-life balance are required at both the individual and organizational levels.

• The Journal of Korean Academic Society of Nursing Education
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• v.18 no.1
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• pp.149-158
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• 2012

Purpose: The purpose of this study was to identify the factors influencing mental health among late elementary age children. Methods: The research design was a secondary data analysis. Data were collected from 746 students in grades 5 or 6, and analyzed using descriptive statistics, t-test, ANOVA, Pearson's correlation coefficients and stepwise multiple regression with the SPSS/PC 18.0 program. Results: The average score of mental health was $3.42{\pm}0.55$. There were significant differences in mental health according to health status, economic status, scholastic performance, relationships with friends, relationships with the teachers, atmosphere of the home, number of siblings and the source of trouble. Stepwise multiple regression analysis showed influencing factors of stress, negative reaction under stress, self-esteem, teacher support, and friend support support and explained 41.4% of total variance in late elementary age children's mental health. Conclusion: These results may contribute to a better understanding of mental health in late elementary age children. The results of the present study indicate a need to develop nursing interventions to prevent and manage elementary school-age children's negative reaction under stress.

• Korean Journal of Adult Nursing
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• v.26 no.2
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• pp.234-243
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• 2014

Purpose: The purpose of this study was to investigate the factors influencing the health-promoting behaviors of the people living with HIV. Methods: Descriptive cross-sectional study design was used. The study participants included 99 people living with HIV recruited via the Korea HIV/AIDS Network of Solidarity from May 15 to August 15, 2012. Self-report questionnaires were used fo data collection measuring perceived stress, depression, self-efficacy, health-promoting behaviors (HPLP-II), and the perceived health status. The analysis was done using SPSS/Win 18.0 program. Descriptive statistics, pearson correlation, t-test, ANOVA and stepwise multiple regressions were used for data analysis. Results: Perceived stress (r=-.21, p=.040), depression (r=-.37, p<.001), self-efficacy (r=.42, p<.001), perceived health status (r=.29, p=.003), and health-promoting behaviors were significantly correlated with each other. The self-efficacy, religion and perceived health status were significant factors, which explained about 26% of the variance of the health-promoting behaviors. Multiple regression analysis showed that a powerful predictor of health-promoting behaviors among people living with HIV was self-efficacy. Conclusion: This study suggested that a focus of nursing intervention program on self-efficacy is necessary in order to increase health-promoting behaviors among people living with HIV.