• Child Health Nursing Research
• /
• v.8 no.2
• /
• pp.141-151
• /
• 2002

The purpose of this study was to find out the correlations between mother-adolescent communication and quality of life in the adolescents. The study subjects consisted of 171 adolescents who were going to middle school and high school. The data included general characteristics, health related characteristics, stress, mother-adolescent communication and quality of life. The data were analyzed by frequency, mean, percentage, t-test, ANOVA and Pearson's correlation using the SPSS statistical program. The result were as follows: 1. The mean score for the stress of adolescent was 2.48(maximum score: 5) and there were significant difference according to demographic variables that is sex, grade, father's being and health related variables that is health status, frequently ill, illness severity and illness of family. 2. The mean score for the mother-adolescent communication was 3.27(maximum score : 5) and there were significant difference according to demographic variables that is father's and mother's being. There were no significant difference according to any health related variables. 3. The mean score for the quality of life of adolescent was 3.97(maximum score : 7) and there were no significant difference according to demographic and health related variables. 4. There was a negative correlation between the stress and the quality of life. There was a positive correlation between the quality of life and the mother-adolescent communication. There was a no correlation between the mother-adolescent communication and the quality of life. Consequently, the implication for nursing of this study is that there is a need to develop relief strategy of stress for the female adolescents. And there is a need to develop a promoting program of quality of life for the adolescents considering the stress and the mother-adolescent communication.

• The Korean Journal of Applied Statistics
• /
• v.9 no.1
• /
• pp.53-73
• /
• 1996

This paper compares two accelerated life for Weibull distribution. One is the optimum constant stress accelerated life test which minimizes the asymptotic variance of maximum likelihood estimator of a specified quantile at design stress, and the other is corresponding simple step stress test. The models and optimum designs of constant stress and step stress tests are reviewed. Behaviors of asymptotic variances, effects of design parameters to optimum tests, and expected numbers of failures and expected test times of the two tests are investigated. The efficiency of step stress test relative to constant stress test is studied in terms of variance ratio, and robustness to preestimates of design parameters are investigated.

• Korean Journal of Health Education and Promotion
• /
• v.19 no.1
• /
• pp.199-212
• /
• 2002

Stress not only brings disorders in social, family life but brings also changes in eating behaviors so that the imbalance of food intake is induced. Our study was carried out to find out the association between the degree of stress and eating behaviors for the subjects of 262 female college students in the Suwon area. The study instrument was a structured questionnaire composed with questions about demographic data, food preferences, questions related to life styles, and health. All of the collected data was analyzed by the degree of stress score, grouping into high(25〈) and low stress group(〈=25). High stress group showed unhealthy lifestyles, higher percentage of irregular menstruation, smoking, dizziness, higher amount of alcohol consumption. They also showed higher preference rate of spicy foods including hot foods, oil based foods and showed percentage of removing visible fat when eating meats. They more wanted to control weight and prefers snacking compared to low stress group. These results show that stress changes in eating behaviors in a way of unhealthy life styles.

• Proceedings of the Korea Society for Industrial Systems Conference
• /
• 2001.05a
• /
• pp.129-133
• /
• 2001

Accelerated life test is a viable method for identifying failure modes, incorporating design changes on an on-going basis during the early stages of automotive development program. The information from tests at high stress levels is extrapolated to obtain estimate of life at normal stress levels. This paper presents a practical method for accelerated life test to achieve a specified accuracy in estimating life at a design stress. Recommended and optimum plan are presented and the plans are illustrated with a simulated test data for the automotive power element example.

• Journal of the Korean Data and Information Science Society
• /
• v.17 no.4
• /
• pp.1375-1386
• /
• 2006

In life testing, the lifetimes of test units under the usual conditions are so long that life testing at usual conditions is impractical. Testing units are subjected to conditions of high stress to yield informations quickly. In this paper, the inferences of parameters on the three step-stress accelerated life testing are studied. The two-parameter exponential distribution with a failure rate function that a log-quadratic function of stress and the tempered failure rate model are considered. We obtain the maximum likelihood estimators of the model parameters and their confidence regions. A numerical example will be given to illustrate the proposed inferential procedures.

• Journal of Korean Institute of Industrial Engineers
• /
• v.19 no.2
• /
• pp.15-21
• /
• 1993

This paper considers the optimal design of accelerated life test in which the stress is linearly increased. It discusses the special case when the life distribution under constant stress follows an exponential distribution and the accelerated equation satisfies the inverse power law. It is assumed that cumulative damage is linear, that is, the remaining life of test units depends only on the current cumulative fraction failed and current stress(cumulative exposure model). The optimization criterion is the asymptotic variance of the maximum likelihood estimator of the log mean life at a design stress. The optimal increasing rate is obtained to minimize the asymptotic variance. Table of sensitivity analysis is given for the prior estimators of model parameters.

• Journal of Korea Entertainment Industry Association
• /
• v.13 no.8
• /
• pp.563-572
• /
• 2019

This study was conducted to investigate the effects of school stress and resilience on school children's quality of life. The participants for this study were 266 children of 4, 5, and 6 grades at two elementary schools in G Metropolitan City. Data were collected from September to October, 2019. The participants were assessed for academic stress, resilience, quality of life, and analyzed using descriptive statistics, t-tests, ANOVA, Pearson correlation coefficient, and multiple regression analysis. As a result, factors affecting the quality of life of school-age children were academic stress (β= -.29, p<.001), extracurricular academic stress (β= -.19, p= .004), and resilience (β= .19, p<.001), this variable explained 31.2% of the quality of life of school-age children. The lower the academic stress and the higher the resilience, the higher the quality of life. Therefore, in order to improve the quality of life of school-age children, providers need to develop intervention programs that take these factors into account.

• BMB Reports
• /
• v.52 no.8
• /
• pp.502-507
• /
• 2019

Translation is a costly, but inevitable, cell maintenance process. To reduce unnecessary ATP consumption in cells, a fine-tuning mechanism is needed for both ribosome biogenesis and translation. Previous studies have suggested that the ribosome functions as a hub for many cellular signals such as ribotoxic stress response, mammalian target of rapamycin (mTOR), and ribosomal S6 kinase (RSK) signaling. Therefore, we investigated the relationship between ribosomes and mitogen-activated protein kinase (MAPK) activation under ribotoxic stress conditions and found that the activation of c-Jun N-terminal kinases (JNKs) was suppressed by ribosomal protein knockdown but that of p38 was not. In addition, we found that JNK activation is driven by the association of inactive JNK in the 80S monosomes rather than the polysomes. Overall, these data suggest that the activation of JNKs by ribotoxic stress is attributable to 80S monosomes. These 80S monosomes are active ribosomes that are ready to initiate protein translation, rather than polysomes that are already acting ribosomes involved in translation elongation.

• Journal of Families and Better Life
• /
• v.21 no.2
• /
• pp.31-38
• /
• 2003

This study was conducted to develop a Parenting Stress Scale that measures the day-to-day difficulties entailed in parenting for school-aged children. First, sixty seven items were collected as a baseline. Some of these items were pooled from existing parenting stress scales(Abidin, 1990; Kim & Kang, 1997), and the rest were generated based on interviews with parents of school-aged children. Secondly, Chi-Square tests were conducted and framer's V coefficients were calculated to determine the goodness-of-fit of the items. Twenty four items were selected from this step. The results of a factor analysis on these 24 items revealed two dimensions of this new Parenting Stress Scale, namely, 'school-related parenting stress' and 'general everyday life stress'. A test of construct validity also showed that this scale has adequate internal consistency.

• Women's Health Nursing
• /
• v.23 no.2
• /
• pp.145-153
• /
• 2017

Purpose: This study examined degrees of irrational parenthood cognition, post traumatic stress disorder (PTSD), spousal support, and quality of life and investigated factors that influence the quality of life of infertile women. Methods: Research design was a cross sectional correlational survey with a total of 113 female patients receiving treatment for infertility. Data were collected from August 1 to November 30, 2015. The collected data were analyzed using t-test, ANOVA, Pearson's correlation, and multiple regression analysis. Results: The mean score of the quality of life was $59.0{\pm}14.8$. The quality of life was significantly associated with irrational parenthood cognition (r=-.70), post traumatic stress disorder (r=-.65), and spousal support (r=.56). The factors significantly affecting the quality of life in infertile women were irrational parenthood cognition (${\beta}=-.45$), post traumatic stress disorder (${\beta}=-.34$), and spousal support (${\beta}=-.32$). The explained variance by these factors was 70.4%, and the regression model was valid (F=89.81, p<.001). Conclusion: This study may contribute to the development of nursing intervention program to improve the quality of life of infertile women.