• Human Ecology Research
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• v.54 no.5
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• pp.541-550
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• 2016

This study explored a typology (or time allocation), investigated personal and work characteristic differences among time allocation types, and identified determinants of time allocation types of married working women with a preschool child. The data source for this research was the 2014 Time Use Survey conducted by Statistics Korea. We analyzed 368 time diaries (184 for weekdays and 184 for weekends) using frequency, mean, cluster analysis, chisquare, analysis of variance (ANOVA), Duncan's test, and multinomial logistic analysis. The results of this research are as follows. Time allocation of married working women with a preschool child was classified into three different types of 'work-centered,' 'work-family balanced,' and 'family-centered.' The work-centered type accounted for 14.7% of total respondents, and compared with other types, this type of people spent more time working, and less time doing house-work, caring for family, and having leisure. The work-family balanced type represents more than half of the total, and spend more time working on weekdays and house-working, having leisure on weekends. The family-centered type represents 28.8%, and spends most of the time doing house-work and caring for family on both weekdays and weekends. Occupation, employment status, monthly income, and weekly hours of work were different for each type. Occupation, employment status, perception of lack of time, health condition, and weekly hours of work were identified as determinants for each type.

• Journal of Family Resource Management and Policy Review
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• v.20 no.2
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• pp.99-117
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• 2016

This study investigates the work-family interactions of married men, the variables affecting these interactions, and the differences between the variables affecting work-family conflict and those affecting work-family enhancement. The subjects of this study were 1,249 married men. The major findings are as follows. First, married men perceived moderate levels of work-family conflict and work-family enhancement both from work to family and from family to work. Second, the level of work-family conflict was higher than that of family-work conflict, and the level of family-work enhancement was higher than that of work-family enhancement. Third, work-family conflict was influenced by external occupational rewards, the relative importance of work and family life, a family-friendly work environment, perceived working hours, and spousal support. The variables that have an effect on work-family enhancement are perceived working hours, a family-friendly work environment, the relative importance of work and family life, and spousal support. Fourth, family-work conflict is influenced by age, spousal support, perceived family-work enhancement are spousal support, seeking internal and external occupational rewards, the relative importance of work and family life, and a family-friendly work environment. Finally, the variables that affect work-family conflict and those affecting work-family enhancement are similar, but the variables affecting family-work conflict and those affecting family-work enhancement are very different.

• Transactions of Materials Processing
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• v.21 no.1
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• pp.58-66
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• 2012

The work roll surface temperature rises and falls repetitively during hot slab rolling because the work roll surface is cooled continuously by water. This study focused on Std. No. 7 to determine a cooling method which significantly reduces the tangential tensile stresses on the work roll surface of the hot slab mill at Hyundai Steel Co. in Korea. A series of finite element analyses were performed to compute the temperature distribution and the tensile stresses in the circumferential direction of the work roll. The virtual slab model was used to reduce the run time considerably by assigning a high temperature to the virtual slab. Except for the heat generated by plastic deformation, this is equivalent to the hot rolling condition that a high temperature slab (material) would experience when in contact with the work rolls. Results showed that when the virtual slab model was coupled with FE analysis, the run time was found to be reduced from 2000 hours to 70 hours. When the work roll surface cooled with a certain on-off patter of water spray, the magnitude of the tangential stresses on the work rolls were decreased by 54.1%, in comparison with those cooled by continuous water spraying. Savings of up to 83.3% in water usage are possible if the proposed water cooling method is adopted.

• Korean Journal of Occupational Health Nursing
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• v.17 no.2
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• pp.117-125
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• 2008

Purpose: The purpose of the study was to find the ways to prevent the fatigue of the office of railroad employees. Method: The data were collected from the male employees of Korea Railroad Corporation. Results: The mean score of the degree of fatigue was 4.33. The factors that affected the level of fatigue were support from senior officials, exercise, age, work stress, number of work hours per week, alcohol intake and working area. To be more specific, the level of fatigue was lower when the support from senior officials was higher. The employees who did no exercise, who are in the age between 31 and 40, with high working stress, who worked 61 hours per week of higher, non-drinkers were found to have higher level of fatigue. The employees with the age of 51 years or older with unspecified work area had relatively lower level of fatigue. Conclusion: In conclusion, to decrease the level of fatigue of the office of railroad employees, the development of health improvement programs are required such as increase of the support from senior officials, change in exercise and drinking habit, decrease of the work stress and adjustment of the working hours.

• Journal of Information Technology Applications and Management
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• v.24 no.3
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• pp.23-49
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• 2017

This paper is part of the dissertation for an MSc in Project Management and Innovation of Strathclyde Business School The research aims at understanding how IT-SMEs (Small and Medium-sized Enterprises in Information Technology Business) implement and use Flexible Work Arrangements and Flexible Working Hours (FWH/FWA) in their organisations. In-depth interview data was collected from managers and business owners of 31 companies whose needs for Work-Life Balance varied. Results show that many factors positively influence IT-SMEs to use FWH/FWA. For example, customers and partners working at different work-hours, traffic congestions between home and office, and the general stereotype of IT personnel. However, the results also found several concerning factors that may hamper the success of FWH/FWA implementation. They include the inadequacy of management skills in tracking, monitoring, and assessing employee's real performance, contextual factors for Thai IT-SMEs, i.e. conflict resolution culture, IT people's protocol of communication exchanges, and shortcoming of technology infrastructure. The findings also show that many companies that had used FWA eventually stopped. Thus, a four-phase cyclical framework called PLIC (Purpose-Limitation-Implementation-Consequence) has been developed as an approach to FWH/FWA implementation.

• Journal of Preventive Medicine and Public Health
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• v.27 no.1 s.45
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• pp.74-83
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• 1994

To investigate the sleeping patterns and gastrointestinal disorders of shift workers, the author studied 434 female workers who worked at textile industry ill Taejon city from September 1,1992 to September 31,1992. Shift pattern were divided into 3 categories ; 3 shift(shifts per 8 hours), 2 shift(day and night shift) and day work. The results obtained were as follows : 1 The average sleeping hours when adjusted for the education level of the total study subjects was 6.1 hours. That of 3 shift workers was 6.1 hours, 2 shift workers was 6.0 hours, but that of day workers was 6.5 hours. There were no significant difference among the shift workers. 2. For the 3 shift workers, the average physiologic adjusted duration in day shift (2.2 days) was shorter than that of night shift(2.7 days) and there were significant difference among the rotating shift works (p<0.001). The sleeping problems in day shift was less than those of night shift (p<0.001). 3. 44.9% of 3 shift workers, 39.3% of 2 shift workers and 33.1% of day workers complained gastrointestinal symptoms when adjusted for the age, education level, job tenure, work post. And the rates of gastrointestinal symptoms complained increase with job tenures (p<0.001). 4. The most frequent gastrointestinal diseases were gastitis and gastric ulcer with 14.2% , Irritable bowel syndrome with 3.1 %, duodenitis and duodenal ulcer with 2.1% and combined gastrointestinal disease with 2.1%. Age, eating habit, amount of coffee per day, job tenure, work post and shift pattern showed no significant difference with the gastrointestinal diseases when adjusted for the age. According to the above results, the author suggested that the shift pattern and job tenure can affect to the sleeping problem and gastrointestinal symptoms.

• Journal of Families and Better Life
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• v.18 no.3 s.47
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• pp.1-14
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• 2000

This study was to find out the status of labor division between rural husband and wife by measuring the labor time for tasks, the ratio of relative contribution toward work, and work segregation. Data used in this study were collected fro 424 persons of 212 farm households mainly cultivating rice and barley. The results of this study were as follows : 1) In the case of work directly related to farming, working hours of husband were significantly longer than those of wife during the farming and off-farming season. In contrast working hours of wife for housekeeping were significantly longer than those of husband during both seasons. 2) The ratio of relative contribution toward farming work of husband was a little higher than that of wife during farming and off-farming season. But this toward housekeeping work was less than that of wife. 3) The degree of gender segregation in farming was 0.33 during the farming season and 0.01 during the off-farming season. The kinds of work and time distribution were relatively same. The degree of gender segregation in housekeeping was 0.79 during the farming season and 0.72 during the off-farming season. These values showed inequality of work segregation in the kind of work and time distribution.

• Journal of the Ergonomics Society of Korea
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• v.33 no.5
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• pp.313-321
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• 2014

Objective: The purpose of this study is to develop products that prevent muscular skeletal disease of farm workers, which would bring improvement for an efficient harvesting work. Background: A pretest for product development and a survey research was carried out to inspect the problems of current harvesting work procedure. The product was developed and assessed based on ideas to supplement and improve these weak points. Method: A total of twenty men were recruited to evaluate the effects of harvest baskets on the upper-limb muscle activity, working hours. For the usability evaluation, electromyogram and working hours of previous working method (disuse of harvest basket, one-hand carriage of the basket) and new working method with the usage of newly-developed harvest basket was examined. The whole anterior deltoid, biceps brachii and erector spinae on both sides, which make a total of six muscle parts, were used for this experiment. The results were analyzed using ANOVA with muscle activity (%MVC) of each three forms of work and required work time from SPSS 18.0. Results: According to the test result, all muscles did not demonstrate any statistically significant difference, with an exception of the backbone erector (right). The muscle activity of backbone erector (right) in the work method that uses the harvest basket developed in this study was detected to be approximately 23% less than that of the previous working method. Moreover, compared to the previous working method, the required work time decreased to a statistically significant degree. Conclusion: As such, the decrease in the amount of waist muscle usage at harvesting work would enable the prevention of muscular skeletal disease and stabilization of lumbar spine. Application: Which in turn would increase the effectiveness and reduce personnel expense (labor costs) while enhancing productivity with a decreased working hours.

• Korean Journal of Biological Psychiatry
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• v.29 no.2
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• pp.46-55
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• 2022

Objectives Many studies have reported noticeable increases in the proportion of employees working either relatively short or relatively long hours. Such trends have been accompanied by an increasing concern that how much subjective mental well-being of employees would be influenced by their hours of work. The aim of this study was to investigate the association between work hours and clinically relevant depressive symptoms with demographic variables adjusted. Methods Participants were employees of a total of 56 private companies and local government organizations in Korea, aged 19 to 65 years. A self-report questionnaire that included items on working hour, job stress, levels of depression, and socio-demographic factors was administered to 15360 Korean employees, with 14477 valid responses. Hierarchical linear regression analyses, adjusted for sociodemographic factors, job related demographic factors, job stress, were used additionally to estimate the association between working hours and depressive scores. Results We found that working more than 40 hours per week correlated positively with the level of depressive symptoms after adjusting for demographic variables and the level of job stress. Furthermore, working 40 or fewer hours per week correlated negatively with the level of depressive symptoms. Being younger (β = -0.078, β = -0.099), being a female (β = 2.770, β = 1.268), and possessing a lower level of education (β = -0.315, β = -1.125) were significantly associated with higher level of depressive symptoms in all respondents. Conclusions Both of working excessively long or short hours is significantly associated with the prevalence of depressive symptoms. Establishing proper office hours for employees is critical to improving the quality of working conditions and maintaining good mental health in the workplace.

• Journal of Family Resource Management and Policy Review
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• v.23 no.3
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• pp.75-88
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• 2019

This study focuses on changes in a father's role from one that is work-centered to a work-family balance, analyzing the type of father's work-family reconciliation and to compare the differences among the types. An online survey was conducted with 1,037 fathers of school-aged children. The survey subjects were assigned to a ratio of 1:2:1:1 for fathers who have a child in kindergarten, elementary school, middle school and high school. The fathers' work-family reconciliation type was a variable composed of three categories: work-centered, family-centered, and work-family centered. In the research model of this study, the fathers' work-family reconciliation type was influenced by family characteristics(the age of first child, the number of children, dual earner, and spouse support) and work characteristics(weekly working hours, work flexibility, and leaving work on time). We analyzed characteristics of work-family reconciliation through housework time, child care time, leisure time, family meals, and time spend talking with their children. The results showed that father's work-family reconciliation type was significantly different according to the characteristics such as first child age and spouse support, work characteristics such as weekly working hours and leaving work on time. The time distribution differed significantly depending on the father's work-family reconciliation type. Therefore, a fathers' work-family reconciliation can be considered typified by the interaction of family and work characteristics. This study suggests policy implications for supporting fathers' work-family reconciliation.