• Korean Journal of Occupational Health Nursing
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• v.27 no.4
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• pp.191-202
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• 2018

Purpose: This study analyzes the relationship between work-life conflict and turnover intention among hospital nurses. Furthermore, it seeks to determine whether the relationship between the two varies depending on the shift work condition of the nurses. Methods: A total of 435 nurses working at five tertiary hospitals were included in the study. The questionnaire included items on turnover intentions, work-life conflicts, sociodemographic factors, working conditions, and internal and external resources. Results: The level of work-life conflict among shift work nurses was higher than that of non-shift work nurses. The turnover intention was also higher for shift work nurses than for non-shift work nurses. Results from the multivariate logistic regression analysis revealed that the work-life conflict of nurses had a positive relationship with turnover intention. The effect of work-life conflict on turnover intention was greater for shift work nurses than for non-shift work nurses. Conclusion: Work-life conflict had a greater impact on the turnover intention of hospital nurses working under shift work conditions. Based on this study's findings, it can be suggested that, in order to reduce high turnover intention, it will be necessary to make specific efforts to balance work-life conflict and improve working conditions.

• Transactions of the Korean Society of Mechanical Engineers
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• v.14 no.2
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• pp.276-287
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• 1990

In this paper research result of transient thermal stress analysis of power plant turbine rotors for life prediction under severs operating conditions is presented. Galerkin's recurrence scheme is used for numerical solution of discretized FEM equation of transient heat conduction equation. Boundary conditions for the equation and operating conditions are intensively investigated for accurate life prediction of turbine rotors in operation. A computer program for on-site application is developed and tested. Distribution of thermal stress in turbine rotors during various operating condition is analyzed with the program and it is found that the peak thermal stress appears during cold stage conditions at the first stage of high pressure rotors.

• Journal of Microbiology and Biotechnology
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• v.18 no.3
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• pp.568-572
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• 2008

This study was conducted to investigate the effect of modified atmosphere packaging (MAP) in combination with BN/PE film on the shelf life and quality of fresh-cut iceberg lettuce during cold storage. The total mesophilic population in the sample packed in BN/PE film under MAP conditions was dramatically reduced in comparison with that of PE film, PE film under MAP conditions, and BN/PE film. The $O_2$ concentration in the BN/PE film under MAP conditions decreased slightly as the storage period progressed. The coloration of the iceberg lettuce progressed the slowest when it was packaged in BN/PE film under MAP conditions, followed by BN/PE film, PE film, and PE film under MAP conditions. The shelf life of fresh-cut iceberg lettuce packaged in the BN/PE film under MAP conditions was extended by more than 2 days at $10^{\circ}C$ as compared with that of the BN/PE film in which the extension effect was more than 2 days longer than that of PE, PET, and OPP films.

• Advances in materials Research
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• v.9 no.3
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• pp.189-202
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• 2020

The objective of the present work is to investigate the effect of cutting parameters (Vc, fz and ap) on tool life and the level of vibrations velocity in the machined part during face milling operation of hardened AISI 52100 steel. Dry-face milling has been achieved in the annealed (28 HRc) and quenched (55 HRc) conditions using multi-layer coating micro-grain carbide inserts. Statistical analysis based on the Response surface methodology (RSM) and ANOVA analysis have been conducted through a plan of experiments methodology using a reduced Taguchi table (L9) in order to obtain engineering models for tool life and vibration velocity in the workpiece for both heat treatment conditions. The results show that the cutting speed has a dominant influence on tool life for both soft and hard part. Cutting speed and feed per tooth is the most significant parameters for vibration levels. Comparing the experimental values with those predicted by the developed engineering models of tool life and levels of vibrations velocity, a good correlation has been obtained (between 97% and 99%) in annealed and hard conditions.

• Journal of Family Resource Management and Policy Review
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• v.20 no.2
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• pp.75-98
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• 2016

This study examines the work-life balance designing of new employees using qualitative research. Eight new employees at foreign IT companies in Korea were interviewed in two groups composed of two male workers and two female workers. The research determined two main themes and seven sub-themes related to the participants work-life balance using theme analysis. The first main theme was 'working conditions' which had sub-themes, 'performance-based system in foreign IT companies', 'flexible working conditions', 'family-friendly company culture', and 'positive evaluation of the company'. The second main theme was 'work-life balance' which included the sub-themes, 'changing priority during transitional periods of life', 'work-family balance designing as a family unit', and 'difficulties balancing between work and family'. The results revealed that workers prospected that flexible working condition might solve the demands of the child-rearing period and that work-family balance was determined as a family unit. Additionally, there were gender differences in the relationships between working conditions and work-life balance.

• The Korean Journal of Community Living Science
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• v.24 no.4
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• pp.485-495
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• 2013

As rural life has shifted with the long term changes in the internal and external conditions of rural communities, this study aims to investigate the living conditions and life satisfaction of rural women. 70 questionnaires in health, clothing, food, shelter, economic conditions and child-rearing fields were used for a survey of 393 rural women from five rural areas in the northern region of Gyeongsangbuk-Do. Statistical techniques of frequency analysis, descriptive statistics, ANOVA, t-test and regression analysis were employed through 'SPSS Statistics 21'. Participants were divided into 3 groups, with Group A with income less than 15 million won, Group B with income of at least 15 million won and less than 30 million won, and Group C with at least 30 million won. For the life satisfaction and health conditions, Group C showed higher scores than Group A. The food security status of rural women in the research area was worse than that in the Korea National Health and Nutrition Examination Survey, and food consumption by Group C was higher than that of Group A and Group B. For the satisfaction of kitchen, bathroom facilities and heating system, the income of 15 million won seemed to be the divisive value where richer groups were more satisfied. Job satisfaction seemed more related with the income amount rather than with the job itself. The parenting efficacy and child-rearing satisfaction were higher for Group C than for Group A. Determinants of life satisfaction turned out to be health conditions, heat susceptibility, fruit consumption, kitchen unit satisfaction, job satisfaction and parenting efficacy.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.36 no.7
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• pp.751-757
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• 2012

An accelerated life test (ALT) is a test method that forces components to fail more quickly than they would under use conditions by applying higher overstresses. When two or more accelerating stresses are involved in an ALT, an interaction effect may occur. In previous studies, mostly ALTs without considering an interaction of accelerated stresses and accelerated life models were proposed. The life data obtained are extrapolated using a life-stress relationship to estimate the life distribution at use conditions. We use the general log-linear relationship to model the dependence of life in the Weibull distribution on stress. Therefore, this study suggests the acceleration factor model between the lives at use conditions and accelerated conditions by using mechanical component life data considering an interaction effect. Further, the accelerated life test method and acceleration factor model proposed in this paper will be the basis for adopting an accelerated life test with accelerated stress interactions.

• 한국노년학
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• v.31 no.4
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• pp.1229-1246
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• 2011

The objectives of this study were to analyze change in life satisfaction of Korean elderly, to find determinants of it in an aging society, and to suggest ways of improving their life satisfaction. Data used in this study were from 1994, 2004, 2008 national survey results on the elderly life conditions and welfare need conducted by the Korea Institute for Health Social Affairs and Keimyung University, which were collected from 1,371, 3,278, 3,009 elderly people aged 65 and over who answered regarding their life satisfaction each year. Data were analyzed by multiple regression method. The results of analysis showed that the general life satisfaction of Koreans elderly is higher than average and is decreasing year after year. Determinants of life satisfaction for Korean elderly can be divided in two factors: common factors(i.e. subjective economic and health conditions) and flexible factors(i.e. marital status, employment status, perceptions of aging). Implications for designing services and service systems for elderly families were discussed.

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

• Tribology and Lubricants
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• v.14 no.4
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• pp.7-14
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• 1998

A correlation between the low-cycle fatigue life and the scuffing-failure life is demonstrated using the plastic strain increment in boundary lubricated sliding. Loadings proportional to hardness with three different lubricated conditions were used to evaluate the plastic strain increments. As the results of scuffing tests using vacuum pump oils in nitrogen gas, plastic strain increment shows 0.0062, and in the mineral oils and commercial engine oils in air, plastic strain increments show 0.0042 and 0.00092. Those are very useful to describe quantitatively the real lubricated sliding conditions, and are very effective to find the relation between the low-cycle fatigue life and the scuffing-failure life.