• Journal of Families and Better Life
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• v.33 no.6
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• pp.35-49
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• 2015

This study is to examine the relationships between experiences in the family of origin with fathers, parenting participation of fathers, and parenting stress of mothers. The subjects in this study consisted of 203 couples with children of ages 3, 4, and5 attending child care centers in the Gyeong-gi province. The results of this research are summarized as follows. First, experiences in the family of origin with fathers, have meaningful correlations with parenting participation of fathers and parenting stress of mothers. Also, parenting participation of fathers has meaningful correlations with parenting stress of mothers. Second, experiences in the family of origin with fathers have direct/indirect influence on parenting stress of mothers and parenting participation of fathers played a mediating role between the two variables. It is significant that these results give the basic research data for developing aparental education program that can lower parenting stress of mothers by parenting participation of fathers.

• The Journal of Korean Academic Society of Nursing Education
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• v.16 no.1
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• pp.14-23
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• 2010

Purpose: The purpose of this study was to investigate the relationship among stress, depression, coping styles and satisfaction of clinical practice in nursing students. Method: Two hundred fifty-eight nursing college students in 1 city were selected by convenient sample. A questionnaire measured the level of stress, depression, coping styles and satisfaction of clinical practice. The data were analyzed using descriptive statistics, t-test, ANOVA, and Pearson's correlation coefficient. Result: The mean score of stress was 2.82 (${\pm}.39$), depression was 19.23 (${\pm}7.70$), coping styles was 2.42 (${\pm}.42$), and satisfaction of clinical practice was 2.81 (${\pm}.41$). There were significant differences on four variables according to the satisfaction of a nursing major. Stress had a significant positive correlation with depression, and a negative correlation with problem focused coping and satisfaction of clinical practice. Depression had a significant negative correlation with satisfaction of clinical practice. Emotional focused coping had a significant positive correlation with depression, and problem focused coping had a significant negative correlation with depression. Conclusion: From the studies reviewed, one can expect a positive effect on decreasing stress and depression among nursing students when the nursing educators use counseling and instruction for clinical practice.

• Journal of Families and Better Life
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• v.20 no.6
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• pp.109-120
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• 2002

The purpose of this study is to investigate the level of role stress perceived by employed housewives working in sales departments, and further, to devise coping strategies that can help reduce stress resulting from their multiple roles The sample of this study consisted of married women who were working in sales departments, who have at least one child, and who live in the greater Seoul metropolitan area. A total of 343 out of 450 originally distributed questionnaires were used for the analysis in this study. The findings of the study are: 1 The housewives in sales departments felt stress most severely in their role as a mother. Next were the roles as a wife, housewife, daughter, daughter-in-law, and working woman, in that order. 2. It appeared that age and the motive for employment affected the overall level of role stress among housewives. The two variables (age and the motive for employment) explained about 23% of the variance. The younger they were the higher was the level of role stress. Also, if they were working for an economic reason (to support the family), they tended to be more stressed out. The results of this study could be utilized as baseline data for policy-making, consultation, and development of educational programs for housewives working in sales departments, an area that has hardly been explored.

• Korean Journal of Metals and Materials
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• v.50 no.8
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• pp.583-589
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• 2012

This work is concerned with a statistical approach to the life prediction on irradiation-assisted stress corrosion cracking (IASCC) of stainless steel (SS) for core internals of a pressurized water reactor (PWR). The previous results of the time-to-failure of IASCC measured on neutron-irradiated stainless steel components were statistically analyzed in terms of stress and irradiation. The accelerating life testing model of IASCC of cold worked Type 316 SS was established based on an inverse power model with two stress-variables, the applied stress and irradiation dose. Considering the variation of the yield strength and applied stress with the irradiation dose in the model, the remaining life of the baffle former bolt was statistically predicted during operation under complex environments of stress and irradiation.

• Korean Journal of Childcare and Education
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• v.14 no.6
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• pp.187-203
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• 2018

Objective: This study aimed to examine the mediating effect of mothers' parenting stress on the relationship between their self-differentiation and the tendency of addiction to social media. Methods: The participants in this study were two hundred and eight mothers with children aged 36 months or younger. Data were analyzed statistically using frequency, Pearson's correlation coefficients, and hierarchical multiple regression analysis. Results: The results of the present study are as follows. First, the mothers' self-differentiation was negatively associated with their parenting stress and social media addiction tendency. Second, both the total scores of the mothers' parenting stress and their distress were found to partially mediate the relationship between their self-differentiation and social media addiction tendency. However, the mothers' daily stress did not mediate the relationship between the variables. Conclusion/Implications: The findings of the current study have implications for developing ways of intervening in mothers' social media addiction tendency by reducing their parenting stress, particularly for mothers with low levels of self-differentiation.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.30 no.4
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• pp.178-184
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• 2019

Objectives: The aim of this study was to measure the effect of a group-based parent education program on parenting stress and attitude and comparing the same according to adult attachment styles. Methods: Twenty-two mothers who enrolled in the parent education program participated in our study. The participants filled in the Korean version of the Experience in Close Relationship Revised (ECR-R), Korean-Parenting Stress Index-Short Form (K-PSI-SF), Maternal Behavior Research Instrument (MBRI), and Symptom Checklist-90-Revised (SCL-90-R) before and after the program. We compared the pre - and post-scores of the groups and compared the differences in effect according to adult attachment styles. Results: For all study participants, the Parent Distress (p=0.023) and Total Parenting Stress (p=0.018) significantly declined after the parent education program. There were no differences in other variables. Within the secure attachment group, the Total Parenting Stress (p=0.008), Parent Distress (p=0.015), and Difficult Child (p=0.011) scores in the K-PSI-SF significantly decreased after participating in the program. The Difficult Child scores (p=0.040) significantly dropped in the K-PSI-SF post program within the secure attachment group, compared to the insecure attachment group. Conclusion: The group-based parent education program impacted parenting stress. Depending on the adult attachment styles, the effect of the program varied.

• Korean Journal of Childcare and Education
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• v.10 no.2
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• pp.5-19
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• 2014

The purpose of this study was to examine the effects of pre-service early childhood teachers' self-expression and stress coping style on their human nature. More specifically, this study attempted to investigate how teachers' human nature, self-expression and stress coping style are correlated with another and determine how much human nature is influenced by the other variables, ultimately providing basic information necessary for improving the humanity of pre-service preschool teachers. Findings of the study can be summarized as follows. First, correlations among pre-service early childhood teachers' self-expression, stress coping style and human nature were investigated to find that those teachers' human nature and self-expression have close relationships with each other and that the two variables are significantly related with their stress coping style. Second, the influences of pre-service preschool teachers' self-expression and stress coping style on their human nature were analyzed to find that the human nature of those teachers as a whole and some sub-areas of the variables like positive self-concept and human creativity have significant relationships with their self-expression and stress coping style. Finally, based on these findings, this study discussed how to establish and manage a curriculum that helps to improve the human nature of pre-service early childhood teachers of junior colleges. It also hopes to find effective ways to manage the department of education.

• Transactions of Materials Processing
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• v.31 no.6
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• pp.394-403
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• 2022

In the automotive industry, cold-drawn austenitic stainless steel is commonly used to handle high fuel pressures in gasoline direct injection (GDI) engines. In this study, we analyzed the effects of main process variables such as cross-sectional shape, drawing speed and friction coefficient on the microstructure, hardness and residual stress of the drawn material in the two-step cold drawing process. By changing the cross-sectional shape in the first-step cold drawing, the possibility of improving the shape accuracy or physical properties of the finally cold-drawn fuel rail pressure sensor product was investigated.

• Journal of Ocean Engineering and Technology
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• v.17 no.6
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• pp.53-57
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• 2003

Optimum design of most structural system requires that design variables are regarded as discrete quantities. This paper presents the use of Genetic Algorithm for determining the optimum design for truss with discrete variables. Genetic Algorithm are know as heuristic search algorithms, and are effective global search methods for discrete optimization. In this paper, Elitism and the method of conferring penalty parameters in the design variables, in order to achieve improved fitness in the reproduction process, is used in the Genetic Algorithm. A 10-Bar plane truss and a 25-Bar space truss are used for discrete optimization. These structures are designed for stress and displacement constraints, but buckling is not considered. In particular, we obtain continuous solution using Genetic Algorithms for a 10-bar truss, compared with other results. The effectiveness of Genetic Algorithms for global optimization is demonstrated through two truss examples.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2004.10a
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• pp.338-341
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• 2004

The dimension of forged part is different with the die dimension by the various effects, such as, elastic deformation and thermal effect. And, the difference amounts are not same according to the forging conditions, for example, forging mode, flow stress, etc. Therefore, the use of FEA is effective to predict and update the required die dimension. However, the variables for FE simulation are also as many as variables in the experiment. The variables give very much effect to the accuracy of FE results. At first, the material model is very deeply affected to the estimated dimension of forged part. And the considering of loading and ejecting stages is also important to increase the dimensional accuracy. The experiment and FEA are performed to investigate the dimensional changes and accuracy in cold forging. Two types of upsetting are used to survey the effects of forging mode and stages.