• Journal of the Korea Safety Management & Science
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• v.4 no.3
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• pp.59-66
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• 2002

This paper presents accelerated life tests for Type I censoring data under probabilistic stresses. Probabilistic stress, S, is the random variable for stress influenced by test environments, test equipments, sampling devices and use conditions. The hazard rate, $\theta$ is a random variable of environments and a function of probabilistic stress. In detail, it is assumed that the hazard rate is linear function of the stress, the general stress distribution is a gamma distribution and the life distribution for the given hazard rate, $\theta$is an exponential distribution. Maximum likelihood estimators of model parameters are obtained, and the mean life in use stress condition is estimated. A hypothetical example is given to show its applicability.

• Journal of the Korean Data and Information Science Society
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• v.26 no.1
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• pp.281-288
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• 2015

In this paper, the maximum likelihood estimators and confidence intervals for parameters of Weibull distribution are derived under three level constant stress accelerated life tests and the assumption that a log quadratic relationship exits between stress and the scale parameter ${\theta}$. The compound linear plan proposed by Kim (2006) is used to allocate the test units at each stress level, which performed nearly as good as the optimum quadratic plan and had the advantage of simplicity. Some simulation studies are given.

• Proceedings of the Korean Society of Plant Biotechnology Conference
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• 2005.11a
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• pp.164-164
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• 2005

• Journal of Korean Physical Therapy Science
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• v.20 no.1
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• pp.77-88
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• 2013

Purpose : The purpose of this study was to examine the levels and influencing factors of the perceived stress and life-satisfaction among mothers of children with disability. Methods : 55 mothers were selected for this study and the self-reporting method to the structured questionnaire were used to collect the data. The data were analyzed with the frequency, t-test, one-way ANOVA, Duncan test using SPSS 14.0 for window programs. Results : Firstly, the level of total perceived stress of the mothers of children with cerebral palsy was 44.28/75, and the average of the items of the perceived stress was 2.95/5. The highest level of subcategory of the perceived stress, 10.82/15, was in parent role stress, and the lowest level of subcategory of the perceived stress, 3.88/10, was in children developmental stress. There were statistically significant differences in the mother's level of stress according to their ages, employment, occupation, and daily activity time and sleeping time. Secondly, the level of life-satisfaction was 3.17/7, and statistically significant difference was found by the treatment cost. Conclusions : We suggest that these variables need to be considered when the stress intervention programs for the mothers of children with cerebral palsy are developed.

• Journal of Korean Public Health Nursing
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• v.29 no.2
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• pp.312-324
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• 2015

Purpose: This study addressed the relationship among nutritional risk, stress, and health related quality of life for older women with a foreign daughter-in-law. Methods: A descriptive research design was used for this study. The subjects of this study were 112 older women with a foreign daughter-in-law all of whom were over 65 years and living in D city. Personal interview was used for data collection. Nutritional risk, stress, and health related quality of life were measured using Nutrition Screening Initiative (NSI), Family Inventor of Life Events and Changes (FILE), and Medical Outcome Study (MOS) Short-form 36-Item Health Survey (SF-36), respectively. Results: Older women with a foreign daughter-in-law showed negative correlation between quality of life related health and nutritional risk, stress and age, and positive correlation between Activities of Daily Living (ADL); 46% of variance in health related quality of life of older women with a foreign daughter-in-law was explained by nutritional risk, ADL, stress and occupation. Conclusion: Based on the results of this study, we suggested that specialized programs should be established to help in development of social relationship networks for older women who have a foreign daughter-in-law.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.8 no.2
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• pp.199-209
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• 2001

The purpose of this study was to examine the relationship between life stress and depression, and the effect of social support in postpartal $4{\sim}6$ week women. Theoretically social support is thought to mediate the relationship between life stress and depression. Data were collected from June 1 to July 30, 1999. The data were analysed by use of SPSS. Two hypotheses were tested using Gamma, a measure of association for ordinal variables. Partial gamma was used to test the third hypothesis. Patterns of elaboration described by Babbie(1986) were selected to interpret the relationship of the three variables in the analyses. The results of this study are summarized as follows ; There was a positive relationship between life stress and depression (Gamma=.45, P=.017), and an inverse relationship between social support and depression (Gamma=-.49, P=.009). Thus the first, two hypotheses were supported. 2. When social support was controlled, the relationship between life stress and depression increased under the condition of low social support, but with high social support, the relationship decreased. It can be interpreted that life stresses are positively related to depression under the condition of low social support, however this relationship cannot be expected with high social support.

• The Korean Journal of Emergency Medical Services
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• v.28 no.2
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• pp.109-118
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• 2024

Purpose: This study attempted to identify correlation between communication skills, self-control, and adaptation to college life and identify how communication skills, self-control, and adaptation to college life influence factors influence clinical practice stress among health-related college students. Methods: Data for this study were collected through an online questionnaire for nine days from April 15, 2024, to April 23, 2024, targeting health-related college students nationwide who experienced clinical practice. Results: Clinical practice stress showed a significant negative correlation with communication skills(r=-.387, p<.001), self-regulation(r=-.355, p<.001), and adaptation to college life(r=-.433, p<.001). The factor that most influenced clinical practice stress was adaptation to college life, with an explanatory power of 20%. Conclusion: It is necessary to reduce stress in clinical practice by improving communication skills, self-control, and adaptation to college life through practical measures such as academic support services, psychological counseling, and major-related programs.

• Genomics & Informatics
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• v.19 no.4
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• pp.45.1-45.8
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• 2021

Brassica napus is the third most important oilseed crop in the world; however, in Korea, it is greatly affected by cold stress, limiting seed growth and production. Plants have developed specific stress responses that are generally divided into three categories: cold-stress signaling, transcriptional/post-transcriptional regulation, and stress-response mechanisms. Large numbers of functional and regulatory proteins are involved in these processes when triggered by cold stress. Here, our objective was to investigate the different genetic factors involved in the cold-stress responses of B. napus. Consequently, we treated the Korean B. napus cultivar Naehan at the 4-week stage in cold chambers under different conditions, and RNA and cDNA were obtained. An in silico analysis included 80 cold-responsive genes downloaded from the National Center for Biotechnology Information (NCBI) database. Expression levels were assessed by reverse transcription polymerase chain reaction, and 14 cold-triggered genes were identified under cold-stress conditions. The most significant genes encoded zinc-finger proteins (33.7%), followed by MYB transcription factors (7.5%). In the future, we will select genes appropriate for improving the cold tolerance of B. napus.

• Journal of Korean Academy of Nursing
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• v.30 no.4
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• pp.956-966
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• 2000

The purpose of this study was to examine the comparative between depression and stress related to life events among women in the menopausal stage. Menopausal stages were divided into two groups: Pre and post-menopausal stages. The degree of depression and stress related to life events between pre and post menopausal women were compared to each other. Women, aged between 41 and 59 years, answered self-reported questionnaires which included Zung's depression scale and life events scale modified by Lee (1984). Findings were as follows; 1) The mean score of premenopausal women who experienced depression was 39.66, and for post-menopausal women the score was 41.45. There was no significant differences in depression levels between pre and post menopausal group.s (t=-1.55, p=.122). 2) Menopausal women experienced low levels of stress related to life events. There were no significant differences between pre and post menopausal groups(t=.527, p>.05). Both pre and post menopausal groups were highly concerned about education issues of their children and disharmony between couples. 3) There was a significant relationship between depression and stress related to life events among post-menopausal groups (r=.22, p<.01). Based on the findings of this study, the menopausal depression was associated with stress related to life events, especially among post-menopausal women. Feelings of lost fertility and feminine attributies result in menopausal depression, which is significantly correlated with women's negative perception of their life events. Therefore, nursing intervention needs to develop to help reduce the levels of depression and overcome their negative perception of the menopausal experience. Nurses should develop nursing strategies to help menopausal women to have positive perceptions and enhance quality of life by assisting their adaptability to physiological and psychological changes related to menopause.

• Journal of the Korean Dietetic Association
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• v.29 no.3
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• pp.157-172
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• 2023

In this study, nurses above the age of 20 years and working in General Hospitals located in the Gyeongbuk province were enrolled as participant. A survey was conducted to identify the relationship between types of health-eating, level of occupational stress, and degree of quality of life. An effective sample size of 120 was determined, and it was validated as a feasible count to perform the analysis by applying the PLS-SEM. We hypothesized that the physiological and psychological occupational stress levels vary according to functional, mental, and trendy types of health-eating lives and impact the degree of quality of life. This was evaluated using structural models, employing the bootstrapping method using the Smart PLS 3.0. Our results indicate that in the relationship between health-eating types and quality of life, the higher the functional health-eating type, the higher the quality of life. The association between job stress and quality of life showed that the higher the psychological work stress, the more negative the quality of life. Examining the association between the type of healthy eating and the quality of life revealed that the higher the functional health-eating type, the higher the quality of life. As a result of verifying the moderating effect of the difference in working period (less than 3 years/more than 3 years), it was found that the shorter the working period (less than 3 years), the higher the psychological stress.