• Journal of Family Resource Management and Policy Review
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• v.16 no.3
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• pp.35-51
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• 2012

The purpose of this study was to assess middle-aged married men and women's access to family resources (economic and relationship) and to examine how this affects their life satisfaction. Data were drawn from the second wave of the Korean Longitudinal Study of Ageing (KLoSA). The sample consisted of 3,265 middle-aged married men and women aged between 45 and 60, who had children. The collected data were analyzed using multiple regression, ANOVA and the Scheff$\acute{e}$ctest using SPSS 18.0 The results showed that there was significant difference between men and women in terms of their access to economic and human relationship resources. In addition, the life satisfaction of the middle-aged was found to be significantly predicted by their access to economic and human relationship resources. In particular, the life satisfaction of group (A), who had low economic resource access but high family relationship satisfaction, was found to be higher than that of group (B), who had access to high economic resources but had low family relationship satisfaction This result indicated that there was an interaction effect between family resources. A number of policy implications were made.

• Korean Journal of Human Ecology
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• v.23 no.4
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• pp.633-652
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• 2014

The purpose of this study was to investigate the effect of personality traits of the middle aged on quality of life while mediated by self-concepts such as self-efficacy and self-derogation, as well as while moderated by subjective socio-economic variables such as economic status, social activities and employment. To verify the conceptual causality model and moderating effects of contextual variables, we analysed 353 cases out of purposively collected 400 cases from a medium sized city. As results, first, conscientiousness of personality traits positively affected quality of life of the middle aged while mediated by self-concepts. Second, neuroticism of personality traits negatively affected quality of life while mediated by self-concepts. Third, agreeableness of personality traits did not eventually affect quality of life, although affected negatively on self-efficacy and positively on self-derogation. Fourth, socio-economic variables such as economic status, social activities and employment moderated various paths in the model, which indicated dynamics of internal variables were affected by contextual variables.

• Journal of Agricultural Extension & Community Development
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• v.9 no.1
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• pp.29-41
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• 2002

The purpose of this study was to explore socio-economic effects of participation in weekend farming. This study was carried out through review of literature and descriptive survey. The data for the study were gathered from 135 randomly sampled urban people who participated in the weekend farming activity. Small scale weekend farming activity of the urban people led them to better quality of life in terms of educational and socio-economic conditions. The major findings of the study were as follows; 1) Weekend farming supplied fresh vegetables to participating urban households, however, showed relatively low economic effects. 2) Participating urban people have experienced new relationships with other participants and could better understood their family members of weekend farming activity. 3) Participating urban people responded that they could improve their quality of life through weekend farming activity. 4) Weekend farming activity proved to be a useful educational experience for children and youth.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.34 no.1
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• pp.74-79
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• 2011

Engineering valuation is a specialized discipline requiring expert knowledge and judgment, which scientifically estimates the economic value of industrial properties. By industrial properties, we mean engineering structures such as mines, factories, buildings, machines, and other industrial facilities as well as facilities of public enterprises. Particular industrial properties can have longer economic life if their performance is excellent and they are still suitable for current manufacturing needs. If not, its economic life will be shorter. As speed of technological progress becomes rapid, life-cycle and development period of a product is becoming shorter. In an industry characterized by rapid development of technology, industrial properties can become obsolescent faster. Even if they are in good working order, they could be no longer suitable for manufacturing new products based on radically different technology. In our research, we apply engineering approach to estimating functional economic life by factoring in technological obsolescence in such an industry.

• Journal of Korean Society of Water and Wastewater
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• v.32 no.1
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• pp.37-45
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• 2018

This study develops a model to estimate the economic life of the large-diameter water supply pipeline in Korea by supplementing existing methods used to perform similar calculations. To evaluate the developed methodology, the model was applied to the actual target area with the conveyance pipe in P waterworks. The application yielded an economic life computation of 39.7 years, considering the cost of damages, maintenance, and renewal of the pipeline. Based on a sensitivity analysis of the derived results, the most important factor influencing the economic life expectancy was the predicted failure rate. The methodology for estimating the economic life of the water supply pipeline proposed in this study is one of the core processes of basic waterworks facility management planning. Therefore, the methods and results proposed in this study may be applied to asset management planning for water service providers.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.30 no.4
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• pp.170-181
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• 2007

The purpose of computing economic depreciation value is to find valuation of assets closely in line with market prices. The valuation of industrial assets are called Engineering Valuation. The two representative techniques for such valuation are Hulten-Wykoff Method, which estimates real value using regression equations, and T-factor Method devised at Iowa State University. The two are all empirical methods for computing service life (duration period). In this paper, we derived the service life by empirical methods using national wealth statistics, and also by more conventional methods such as original group method and retirement method. The results from each method are compared with one another. We also computed economic service life from these results. In S. Korea where amount of asset value statistics is still insufficient, the most effective method for empirically computing economic service life turns out to be the one using national wealth statistics. In addition, we also present economic relationship between depreciation value computed by using Hulten-Wykoff Method and depreciation value computed by using T-factor Method.

• IE interfaces
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• v.6 no.2
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• pp.37-51
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• 1993

This paper studies the economic replacement method for production facilities which requires huge investment but are necessary for higher productivity and competability of products. That is, the general models for the decision of economic life of properties which minimizes the total costs throughout the usage life(Life cycle costs) are generated. Main factors which make influences for the decision of econmic life can be divided by three. These are the change of salvage value, repair and maintenance costs, and availability of production facilities with the passage of usage time. In this paper, the real world data for these three factors are collected and analyzed for the extraction of representative standard forms with the passage of time. And general models for economic replacement methods and optimal usage terms are presented through tables with the combination of the standard forms of these three main factors.

• IE interfaces
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• v.15 no.1
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• pp.64-72
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• 2002

Broaching machine is widely used for machining inner shaped slots in the work-pieces, and provides vertical motion (usually hydraulically powered) between tool and work-piece. In this study, we modelled the tool life process and investigated economic tool life of broaching machine. Tool life process is divided into wear-process and succeeding failure process. Wear process is defined as machining wear and failure process as 'chipping' occurred by random shock. We modelled wear process as linear regression function for products amounts and assumed failure process as Poisson process. Economic tool life is defined as the number of lots which minimizes average tool related cost per lot and analyzed by using age replacement policy technique. As tool-related cost factors, we consider tool replacement cost, tool maintenance cost and quality costs of products. The results of this study can be applied to analyze life process of general machining tools.

• Research in Community and Public Health Nursing
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• v.27 no.2
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• pp.173-182
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• 2016

Purpose: This study was conducted to survey female Vietnamese marriage immigrants' life stress and to analyze factors influencing their life stress and coping strategies. Methods: As descriptive correlation research, this study conducted a survey with 182 conveniently sampled subjects. Data were collected in June, 2015, and analyzed with descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient, and stepwise multiple regression. Results: The subjects' life stress levels were above average, and significantly varied according to their health, and economic status. Stress coping strategies used by the subjects included assistance seeking, problem avoidance, wishful thinking, problem solving, and emotional alleviation in the order of frequency. As a result of the stepwise multiple regression, economic level, economic activity, and health status were found to be the most significant factors influencing the subjects' life stress, and these variables explained 45.1% of the variation in life stress. Conclusion: Female marriage immigrants were experiencing above-average life stress, and they were coping with it mainly in terms of assistance seeking or problem avoidance. In order to mitigate their stress, therefore, it is necessary to provide extended employment opportunities and economic activities for them so that they can cultivate their abilities in health management.

• Asia-Pacific Journal of Business
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• v.13 no.3
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• pp.417-431
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• 2022

Purpose - The purpose of current study is to investigate the determinants of quality of life in Chungbuk province using Korean longitudinal study aging data. Design/methodology/approach - This study used quality of life and perceived healthiness as the dependent variables. This study selected perceived healthiness, economic participation, annual travel frequency, religion, and fellowship as the independent variables to account for quality of life. For the data analysis, this study implemented econometric analysis, which includes ordinary least square, one-way fixed effect, and feasible generalized least square. Findings - Perceived healthiness positively affected quality of life. Also, quality of life is positively influenced by economic participation and annual travel frequency. However, religion and fellowship appeared as non-significant attribute to account for quality of life. The results also present that perceived healthiness is positively influenced by economic participation, annual travel frequency, and fellowship. Research implications or Originality - Given the results, this offers the implication for the senior citizen welfare policy. This study also produced policy implication for local community.