• The Korean Journal of Emergency Medical Services
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• v.23 no.3
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• pp.83-96
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• 2019

Purpose: This study was conducted to provide fundamental resource in improving the quality of life and stress by understanding the influence of egoresilience and social support by paramedic students during field practice. Methods: The measurement instrument consisted of 100 questions on the general characteristics, egoresilience, social support, stress, and quality of life of the participants. Frequency and descriptive analysis, t-test, ANOVA, correlation analysis, and multiple regression analysis were performed. Results: The average scores for egoresilience, social support, and stress were 3.00, 3.14, and 1.68 out of 4.00, respectively. The degree of stress was high enough to be statistically significant in the case of women compared to men, and if unsatisfied with one's major. The average quality of life score was 4.50. The degree of quality of life was high enough to be statistically significant in the case of men compared to women, smokers, drinkers, and if content with one's major. Conclusion: It is suggested that colleges develop programs to increase the satisfaction rate of the students and improve their egoresilience and social support. Such programs would improve the quality of life and address the stress experienced by emergency medical technology students.

• Child Health Nursing Research
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• v.13 no.1
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• pp.5-12
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• 2007

Purpose: The purpose of this study was to examine the level stress in rearing children and quality of life of mothers of children with disabilities and to identify the relationship between stress of rearing these children and quality of life of the mothers. Method: A descriptive, correlational study design was used. The participants in this study were 225 mothers of children with disabilities. With SPSS, t-test, ANOVA, and Pearson's correlation coefficients were used to analyze the data. Results: 1) The mean score for maternal stress in rearing children with disabilities was 3.46, and for quality of life, 2.80. 2) Stress in rearing these children had a negative correlation with quality of life (r=-.761, p=.000). Conclusion: It is suggested that intervention programs to decrease the stress of rearing these children and increase the quality of life should be offered to mothers of children with disabilities.

• Journal of the Korean Home Economics Association
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• v.37 no.6
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• pp.59-76
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• 1999

This study was to investigate casual relation of psychological well-being and quality of life of married couples. For the data set 434 married couples living in Pusan, Korea were chosen. The data were analyzed using M, SD, t-test, Pearson's correlation, multiple regression, and path analysis. The findings of this study are as follows; First, marital satisfaction and the level of quality of life are higher for husbands than wives. Whereas psychological distress is higher for wives than husbands. Second, for husbands, husband's level of education, job satisfaction, husband's housework participation, and job stress have significant effect on marital satisfaction. For wives, wife's level of education, husband's housework participation, and husband's job stress have significant effect on marital satisfaction. Third, for husbands, job satisfaction and job stress have significant effect on psychological distress. For wives, husband's job stress have significant effect on psychological distress. Fourth, for husbands, job stress, marital satisfaction and psychological distress have significant direct effect on quality of life. Besides, husband's age, husband's level of education, job satisfaction, job stress, husband's housework participation, and marital satisfaction are indirectly associated with quality of life. For wives, marital satisfaction and psychological distress have significant direct effect on quality of life. Besides, wife's level of education, husband's job stress, husband's housework participation, and marital satisfaction are indirectly associated with quality of life.

• The Korean Journal of Emergency Medical Services
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• v.24 no.3
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• pp.129-140
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• 2020

Purpose: This descriptive correlational study investigated the effects of post-traumatic stress and compassion competence on the quality of life of 119 Emergency medical technicians(EMTs). Methods: The data of 119 EMTs were collected between May 1 and September 30, 2020. Data analysis was performed using descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient, and hierarchical multiple regression with SPSS 24.0 program. Results: Post-traumatic stress was seen to be negatively correlated with the quality of life (r=-.456, p<.001) and compassion competence was positively correlated with quality of life (r=.250, p=.006). Participants' subjective health status (β=0.30, p<.001), post-traumatic stress (β=-0.39, p=.001) and compassion competence (β=0.29, p<.001) explained 38.5% of variance in the quality of life of the 119 EMTs. Conclusion: These findings indicate that post-traumatic stress and compassion competence are important factors to improve the quality of life of EMTs. Therefore, systematic programs for reducing post-traumatic stress and enhancing compassion competence levels should be developed.

• Journal of muscle and joint health
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• v.13 no.1
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• pp.20-30
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• 2006

Purpose: To determine the effect of Tai Chi exercise program on fatigue, stress, and quality of life in middle aged women. Method: The study was designed as a nonequivalent control group pretest-posttest quasi-experimental study. Thirty subjects were assigned for experimental group and thirty four subjects were assigned for control group. The subjects in the experimental group were participated in Tai Chi exercise program for 60 minutes per session 3 times a week for 8weeks. Tai Chi exercise program consists of 10 minutes warm-up, 45 minutes main, and 5 minutes cooling down exercises. In order to evaluate the effect of Tai Chi exercise program, fatigue, stress, and qualify of life were assessed by measuring the condition of the participants in respect of fatigue, stress, and qualify of life with questionnaire. The data were analyzed by using $x^2-test$, Fisher's exact test, t-test by a SAS-pc+ 8.12 program. Result: After 8 weeks Tai Chi exercise program, there were significant improvement in fatigue, stress, and quality of life in middle aged women. Conclusion: Tai Chi exercise program can be an effective nursing intervention to improve fatigue, stress, and quality of life in middle aged women.

• Journal of Advanced Marine Engineering and Technology
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• v.23 no.4
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• pp.453-461
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• 1999

The estimation of fatigue life at the design stage is very important in order to arrive at feasible and cost effective solutions considering the total lifetime of the structure and machinery compo-nents. In this study the practical procedure of prediction of fatigue life by use of cumulative damage factors based on Miner-Palmgren hypothesis and probability density function is shown with a $135,000m^3$ LNG tank being used as an example. In particular the parameters of Weibull distribution taht determine the stress spectrum are dis-cussed. At the end some of uncertainties associated with fatigue life prediction are discussed. The main results obtained from this study are as follows: 1. The practical procedure of prediction of fatigue life by use of cumulative damage factors expressed in combination of probability density function and S-N data is proposed. 2. The calculated fatigue life is influenced by the shape parameter and stress block. The conser-vative fatigue design can be achieved when using higher value of shape parameter and the stress blocks divded into more stress blocks.

• Journal of Applied Reliability
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• v.7 no.2
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• pp.57-72
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• 2007

This paper suggests an approach for using ALTA 7 PRO to design accelerated life test plans. Conducting a accelerated life test requires finding life distributions at different stress levels and determining an appropriate life-stress relationship. Moreover, a test plan needs to be developed. In its optimal test plan, stress levels are determined and the proportions of test units are assigned at each stress level so that asymptotic variance of the maximum likelihood estimate of a (log) percentile of the life distribution at the design stress is minimized. Examples are presented for usage.

• Journal of Ocean Engineering and Technology
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• v.25 no.5
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• pp.47-51
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• 2011

This paper analyzes the fatigue-life of welded joints using the notch stress approach. In the notch stress approach, the notch effects are usually approximated by introducing weld-bead parameters for the local detailed weld joints. The actual bead shape is complex and 3-dimensional. It may also greatly influence the fatigue strength. In this study, the welded shape was modeled using a 3D-scanner. The critical distance method was adopted in the evaluation of the fatigue effective notch stress for the weldments. Fatigue life tests were performed to verify the present method of fatigue life estimation for two types of welded plates with longitudinal attachments. The estimated results of the present methods were applied to the results of the experiment. The results of the analysis showed that the scatter of fatigue-life for the experimental data expressed in the nominal stress was significantly reduced by applying the effective fatigue stress of the present study.

• Research in Community and Public Health Nursing
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• v.12 no.3
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• pp.696-704
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• 2001

Purpose: This study was to investigate the family life events stress and family functioning and social support of wives, and to find out the correlation among these variables. Method: The subjects were 263 wives who participated voluntarily in the questionnaire. The instrument used in this study comprised family life events stress, family functioning and social support instruments, and the data were collected from Sep.10 to Sep. 29 with self-administered questionnaires. We analyzed the data using descriptive statistics, Pearson correlation, t-test and ANOVA with SPSS win. Results: 1) The mean score of family life events stress was 25.8, family functioning was 47.2, and social support was 43.4(4 point scale), 2) The rate of correlation between family life events stress and family functioning was (r=-.18), that between family life events stress and social support was (r=-.26), and that between family functioning and social support was (r=0.46). 3) The mean score of family life events stress by general characteristics was significant in age, religion and family type. The mean score of family functioning by general characteristics was significant in education. The mean score of social support by general characteristics was not significant. Conclusion: Considering the results above, we can recognize that there are close relations among family life events stress, family functioning and social support. Although the correlation coefficient is somewhat different, these three variables are very significant for wives.

• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 2004.11a
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• pp.339-349
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• 2004

The method for fatigue life prediction of ball bearing is proposed applying the algorithm of contact fatigue prediction based on stress analysis. In order to do this, a series of simulation such as initial surface stress analysis, EHL analysis, subsurface stress analysis and fatigue analysis are conducted from the loading at each ball location calculated for a bearing subjected to external bearing load and contact shape function. And uniaxial fatigue tests are performed to obtain fatigue parameter of AISI 52100 steel. It was found that since stress is usually higher at the inner raceway contact than at the outer raceway contact, fatigue failure occurs on the inner raceway first. When the fatigue life calculated in the stress-based method are compared with $L_{50}$ life of L-P model, Crossland criterion for the radial load increment is similar to $L_{50}$ life and Dang Van criterion for the axial load increment is similar. In the case of EHL contact. there is no difference of fatigue life between dry contact and EHL contact, when maximum Hertz pressure exceeds 2.5GPa.