• Journal of the Korean Society for Geothermal and Hydrothermal Energy
• /
• v.8 no.3
• /
• pp.12-18
• /
• 2012

The purpose of this study is to make an economic analysis(Life cycle cost) of selecting optimal air conditioning system for a research building which is 8 stories with a total floor area of $32,010m^2$. Energy consumptions of three proposed air-conditioning systems(Alt-1,2,3) that reflect the government green-growth policy are calculated and compared. The results show that life cycle cost of Alt-3(Ventilation DX AHU+EHP) is less than Alt-1(EHP+ventilation DX AHU) by 5.1%, and Alt-2(Absorption chiller/heater+EHP) by 34.3%. Annual energy consumption of Alt-3 is less than Alt-1 by 9.9%, and Alt-2 by 37.4%. Annual $CO_2$ emission of Alt-3 is less than Alt-1 by 9.9%, and Alt-2 by 0.2%.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.30 no.4
• /
• pp.164-169
• /
• 2007

The estimation of mortality characteristics of industrial property is an important adjunct to engineering valuation and depreciation estimation. Once the important of depreciation estimation is determined, it is desirable to understand the processes upon which these estimates are based. The Iowa type survivor curves are a set of generalized retirement dispersion models. These curves were based on analysis of actual retirement experience and represent typical retirement behavior patterns likely to be encountered. The retirement rate of Iowa type survivor curves on the semiconductor equipments in Korea industry was estimated by the life estimation process. In this paper, estimates of service lives based on directly observed data of the domestic semiconductor equipments are presented.

• Journal of the Korea Institute of Military Science and Technology
• /
• v.13 no.4
• /
• pp.601-611
• /
• 2010

Currently, a life cycle cost estimates(LCCE) is the most important factor in weapon system acquisition process. However, operation and maintenance(O&M) cost related studies are insufficient from the previous literature survey. O&M cost consists of various cost factors such a man power, maintenance and direct & indirect support costs. We have known that spare-parts cost is a key factor in the O&M cost. In this paper, we developed the spare-parts cost estimating relationships(CERs) of fixed-wing aircraft and armored vehicle weapon systems which include 4 historical cost drivers ; system acquisition cost, deterioration rate, localization rate, mission characteristic. Furthermore, we proposed the application methodologies that O&M cost estimating, total life cycle cost estimating and determination of the economic life using the spare-parts CERs.

• Journal of Electrical Engineering and Technology
• /
• v.10 no.4
• /
• pp.1471-1479
• /
• 2015

A major portion of the capital costs in the present day power transmission systems are due to the cost of equipment and construction process. Transmission utilities in the recent years are drawing greater attention towards performing life cycle costing studies for cost management and decision making. However, the data involved in these studies are highly uncertain and the effect of these uncertainties cannot be directly included in the study process, resulting in inaccurate solutions. Interval mathematics provides a method for including these uncertainties throughout the cost analysis and provides final solution range in the form of intervals. In this regard, it is essential and extremely important that significant research has to be carried out in understanding the principles of life cycle costing methodology and its applicability to cost analysis of transmission lines along with uncertainties involved in the cost assessment process. In this paper, economic analysis of power transmission lines using interval mathematics has been studied. Life cycle costing studies are performed using net present value analysis on a range transmission lines used in India and the results are analyzed. A cost break even analysis considering right of way costs was carried out to determine the point of economy indifference.

• Clean Technology
• /
• v.1 no.1
• /
• pp.34-46
• /
• 1995

Clean Technology goes beyond Clean-UP (or "End of PiPe) Technologies to include Pollution prevention, waste minimisation, and cleaner production. However, the concept of Clean Technology goes deeper than changes in technology, to ways in which human needs can be satisfied sustainably. In other words, Clean Technology, concentrates on delivering a human benefit rather than making a product. Introducing cleaner technology may therefore involve new commercial relationships as well as new technological practices. In some economic sectors, this involves leasing or providing a service rather than selling a product. Life Cycle Assessment (LCA) is an important tool in Clean Technology. LCA involves determining all the resources used and all the wastes and emissions produced in providing the human benefit. Use of LCA ensures that improved environmental performance in one part of the Life Cycle is not achieved merely at the expense of more environmental damage elsewhere. Going beyond LCA, the concepts of Life Cycle Design and "metabolised" use of materials are approaches to obtain maximum benefit from materials as they pass through the human economy. "Closed-loop" use can be a component of clean technology. Looking beyond simple re-use and recycling, a material may pass through a "cascade of uses". typically a series of applications with progressively lower performance specifications. Closed-loop use necessarily involves a change in commercial practice, because the material or product must be recovered after use.

• Journal of East-West Nursing Research
• /
• v.14 no.2
• /
• pp.8-15
• /
• 2008

Purpose: Yangsaeng is a traditional health care regimen that incorporates specific principles and methods to promote health and prevent illness, with the aim of improving the health and longevity of life. The present study assessed Yangsaeng and quality of life (QOL-BREF) in Korea. Methods: Data from 346 adults and elderly Koreans was collected by using a self-reported questionnaire. Analysis of the data included descriptive statistics, Pearson's correlation, t-test, ANOVA and Cronbach's ${\alpha}$. Results: Statistically significant differences in QOL-BREF were evident according to the age, job, religion, education level, economic status and positive thinking. Statistically significant differences were evident in Yangsaeng according to religion, education, economic status and positive thinking. Total QOL-BREF positively related to total Yangsaeng. Morality Yangsaeng, exercise Yangsaeng and sleep Yangsaeng were positively related to all QOL-BREF sub-domains. Conclusions: The Yangsaeng oriental health care regimen can improve QOL, and should be recommended as a means of health promotion and QOL in the Korean culture.

• International Journal of Advanced Culture Technology
• /
• v.8 no.1
• /
• pp.141-151
• /
• 2020

The purpose of this study is to investigate the positive and negative effects of college student part-time experience on college life. The subjects were 335 college students in Chungcheongnam - do. The data were collected by the self - study questionnaire on general characteristics, part - time experience, university life. There is more positive viewpoints in the Area of Public Health than in other majors and in the third grade and it shows that the higher the grade it is, the more positive viewpoints there is. The longer the period of doing part-time work it is, the more negative viewpoints about the life in the university there is, and it needs to be paid attention to. The factors which affects to the positive viewpoints about the life in the university which needs to be paid attention to was the grade and marks, and the negative viewpoints about the life in the university which needs to be paid attention to was marks, economic status, and the period of doing the part-time work. The factors which affects to the positive viewpoints and the negative viewpoints, there needs to be the clear and detailed education, counselling, and welfare, and based on the conclusion of this research, there needs to be a practical solution to improve the life of the university of the students who are experiencing part-time work.

• The Journal of Health Technology Assessment
• /
• v.6 no.2
• /
• pp.106-113
• /
• 2018

Objectives: The purpose of the study was to estimate the economic burden of stroke in Korea using post stroke disability grades and to measure smoking attributed economic burden. Methods: The disability grade of stroke patient was assessed for stroke patients who did not have a history of stroke before from a large cohort study in Korea. Treatment costs of patients were estimated by the National Health Insurance Service annual statistical report and care cost was estimated by the need of care defined by the assessed disability grades of patients. The population attributable fraction from WHO was used to calculate the proportion of cost due to smoking. Results: The study revealed that the cost of the stroke in 2015 was about 3.228 trillion won, while the care-giver cost was approximately 176 billion won. The cost of the smoking attributed stroke was about 724 billion won. Conclusion: This study is useful for estimating the cost of smoking considering the post-stroke disability and the results is important for achieving the national goal of extending healthy life from the Fourth National Health Promotion Plan.

• Proceedings of the Korea Technology Innovation Society Conference
• /
• 2015.11a
• /
• pp.580-593
• /
• 2015

The quality of life is emphasized as one of the important issue in modern society. Such attention to quality of life started getting more attention lately as it is coupled with the country's competitiveness. In spite the quality of life is very significant, the level of the quality of life in the country is not satisfactory. So, the purpose of this study was to analyze the Korean standard measuring technology in terms of the QOL. First, We identified constructs of the QOL on the basis of several studies to derive an analytical framework. Then, We analyzed the distribution of the measurement standard technology in the country in accordance with the framework. The results of the analysis, many of the current measurement technologies described it regardless of the quality of life. Even if the technologies are relevant. they showed a state biased to the economic QOL. This means that QOL was not considered in the measurement technology standard. Therefore the further improved will be needed.

• Proceedings of the Korea Concrete Institute Conference
• /
• 2001.05a
• /
• pp.699-706
• /
• 2001

Waterproofing materials should be expected to last the life of the structure. An approximate life cycle cost should be to compare different materials based on initial and periodic repair / maintenance costs. Waterproofing applicators like materials that are easy to set up and clean up. The designer should choose a material that can be applied in almost all conditions. Design Professionals should specify independent inspection on critical jobs or in all cases where the budget permits. The basic causes of defection occurred during construction should be minimized.