• Journal of the Korean Home Economics Association
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• v.38 no.2
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• pp.123-138
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• 2000

The purpose of this study was to explore to what extent mothers and fathers differ in their disciplinary practices and to examine the relationships between quality of life and the parental disciplinary practices. The subjects of this study consisted of 220 parents(220 mothers and 220 fathers) of 5-6 years of children in Pusan. Descriptive analysis, correlation analysis, t-tests were used for data description and analysis. The major results were as follows: 1. There was a positive relationship between perceived quality of life by fathers and perceived quality of life by mothers. 2. There was a difference between fathers and mothers in relation to perceived quality of life. Fathers perceived their quality of life more highly than did mothers. 3. There were positive relations between parental educational level, household income and quality of life. 4. There were differences between fathers and mothers in relation to disciplinary practices. Fathers exhibited more effective disciplinary practices(including less overreactiveness and less verbosity) than did mothers. 5. There were no relations between parental educational level and disciplinary practices, but household income was only related to maternal disciplinary practices. 6. There were positive relations between quality of life and disciplinary practices. The higher parents perceived their quality of life, the more parents exhibited effective parental disciplinary practices.

• Journal of Families and Better Life
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• v.22 no.5
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• pp.265-281
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• 2004

This study aims at studying dual-earner couple's household work time and life satisfaction in modern times. To reach this goal, dual-earner couple's variable of society and population, income for working hours, attitude of sex's role and working hours time were classified as individual variable of study model. In the end of 2000, positive analysis was completed through dual-earner couples' frequencies, percentage, means, paired-samples T Test, one-way ANOVA, duncan test, multiple regression and path analysis to 112 Korean couples in 'Research material for comparative analysis of family's time use in Korea and in the United States' performed by Lee, Ki-young, along with 3 person in the end of 2000. The time of household work performance at home at this stage is about 30 hours. 90% of 30 hours was given by housewife who was working for another job. In the aspect of dual-earner couple's life satisfaction, the life satisfaction is a little over the level of average. In variables couple's life satisfaction, wife's life satisfaction was additionally influenced by variable of wife's profession, age difference of couple, wife's household work time husband's household work time and wife's sex-role attitudes in oder. Husband's life satisfaction was perfectly influenced by his level of education, his household work time and wife's sex-role attitudes.

• Tribology and Lubricants
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• v.39 no.3
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• pp.94-101
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• 2023

Automotive wheel bearings are a critical component of vehicles that support their weight and facilitate rotation. Life and stiffness are significant performance characteristics of wheel bearings. Designing wheel bearings involves finding optimal design variables that satisfy both performances. CO₂ emission reduction and fuel efficiency regulations attribute to the recent increase in design requirements for lightweight and compact automotive parts while maintaining performance. However, achieving a design that maintains performance while reducing weight poses challenges, as performance and weight are generally inversely proportional. In this study, we perform design optimization of automotive wheel bearings considering life and stiffness. We develop a program that calculates the basic rated life and modified rated life based on international standards for evaluating the life of wheel bearings. We develop a regression equation using regression analysis to address the time-consuming stiffness analysis during repetitive analysis. We perform ANOVA and main effect analyses to understand the statistical characteristics of the developed regression equation. Furthermore, we verify its reliability by comparing the predicted and test results. We perform design optimization using the developed life prediction program, stiffness regression equation and weight regression equation. We select bearing specifications and geometry as design variables, weight as the cost function, and life and stiffness as constraints. Through design optimization, we investigate the influence of design variables on the cost function and constraints by comparing the initial and optimal design values.

• Journal of Industrial Convergence
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• v.19 no.6
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• pp.197-204
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• 2021

The purpose of this study was to examine the effect of sense of community on the quality of life of local residents and the mediating effect of residential satisfaction in the process to improve the quality of life. To this end, as a result of 1:1 survey through a face-to-face survey of 480 local residents in G, Gyeonggi-do, a total of 468 samples were finally analyzed excluding insincere answers. The analysis method was SPSS WIN 25.0, and the mediation model was verified using frequency analysis, descriptive analysis, correlation analysis, and regression analysis. As a result of the study, first, sense of community was found to have a positive (+) effect on quality of life and residential satisfaction. Second, residential satisfaction was found to have a positive (+) effect on the quality of life. Third, residential satisfaction was verified as a partial mediation in the relationship between sense of community and quality of life. Based on this study, the importance of the effect of residential satisfaction in the process of local residents' sense of community affecting their quality of life and practical measures to improve the quality of life were presented.

• Journal of the Korean Society for Precision Engineering
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• v.24 no.9
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• pp.119-129
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• 2007

The residual life expectancy of the container crane which has been operated more or less 39 years is examined carefully, especially on the boom structure. The basic load and load combination need to be considered for to analyse the boom structure. Various parts of container crane are modeled for to analyse stress, the deflection and the fatigue. Analysis results show that the boom is stable in the stress and deflection but the boom vertical member is over the fatigue life. The rail support beam and boom bottom chord are approximately near the fatigue life. Analysis results show that the residual life of rail support beam and the boom bottom chord would be 2.2 years and 6.8 years, respectively.

• Journal of Families and Better Life
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• v.13 no.4
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• pp.165-180
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• 1995

The purpose of this study was to investigate the influences of family life cycle stages and perceived time pressure on strategies for coping with time constraints in housewife-teachers. The subjects of this study were 570 married women teachers who live with their husebands and children in junior and senior high schools in Taegu, A questionaire was used as survey method. Factor analysis and MANOVA were employed for data analysis and Scheffe test forpost-hoc analysis. The main findings were : First the effect of family life cycle stages on the use of personal time reducing strategies was different according to perceived time pressure. Second the effect of perceived time pressure on the use of personal time reducing strategies differed according to family life cycle stages. Third the use of strategies for coping with time contratins was found to be significantly different according to family life cycle stages, Forth there were significant differences in the use of strategies for coping with time constrainsts according to perceived time pressure.

• The Research Journal of the Costume Culture
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• v.8 no.6
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• pp.842-852
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• 2000

The purpose of this study was to classify consumer groups according to the life style dimensions and to analyze conspicuous consumption, clothing shopping motives among consumer groups, and also to clarify relationships between demographic variables and the life style, conspicuous consumption, clothing shopping motives. The subjects were 329 women in their twenties living in Seoul. For data analysis, mean, factor analysis, cluster analysis, t-test, ANOVA, Duncan test were conducted. The results were as follows ; First, consumer groups were classified into the following five subdivisions : passive group, appearance consideration/self-realization group, appearance indifference group, family oriented/economic group, achievement oriented/active group. Second, the significant differences among the classified life style groups were found in conspicuous consumption and clothing shopping motives. Third, there were significant differences in life style, conspicuous consumption, clothing shopping motives according to demographic variables like age, occupation.

• Journal of the Korea Institute of Building Construction
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• v.8 no.6
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• pp.99-105
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• 2008

Resent, requirement of residents is socially increasing for apartment. Apartment housing os developed to reduce the housing shortage caused by urbanism after industrialization in Korea. The Purpose of this study is to analyze the casual relationships of housing satisfaction, living Life-Cycle on all residents of apartment housing. This study develops a theoretical model based on the previous studies, and testifies the hypothesis through analyzing to questionnaires form 643 residents of apartment housing. Then, the data were analyzed by SPSS12+ program package in terms of frequency, correlation analysis and multiple regression analysis. The results of this study is summarized as the followings: The perceived quality had positive effects on the factor of living Life-Cycle and housing satisfaction. Finding of this study can provide valuable information for a criterion of decision making to consumer and a marketing strategy of housing construction company.

• Journal of Korean Society of Rural Planning
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• v.15 no.2
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• pp.43-57
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• 2009

In aspect of stable housing support policy for the rural returning voluntary which is increasing rapidly, it is necessary to plan the suitable rural house. Therefore this paper aims to propose the suitable rural housing type and the directions of rural house planning. The 4-typical life style is summarized through the 531 cases-life style investigation of existing rural resident and the rural returning voluntary in the whole rural area. Based on the typical life style analysis, the suitable rural housing type and planning directions are proposed. I hope this paper will be a useful guide to make the suitable rural house have planning for our generation.

• Journal of the Korean Society for Precision Engineering
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• v.14 no.7
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• pp.91-98
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• 1997

Because of a complicated behavior of fatigue in mechanical structures, the analysis of fatigue is in need of much researches on life prediction. A method is developed for the dynamic tensile strength analysis by simple tensile test, which is for the failure life prediction by lethargy coefficient of various materials. Then it is programed to analyze the failure life prediction of mechanical system by virtue of fracture. Thus the dynamic tensile strength analysis is performed to evaluate life parameters as a numerical example, using the developed method.