• Proceedings of the Korean Society For Composite Materials Conference
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• 2002.10a
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• pp.193-197
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• 2002

Polyurethane casting wing fairings included in F-5E/F 15% spar kit are to be installed on aircraft wing surfaces and used for compensating the changes of the aerodynamic configuration by the leading edge extension fairings. These fairing are mandatory items in repairing wing areas and was imported from foreign supplier with long term delivery and high cost. Accordingly, local manufacturing is necessary to get rid of above disadvantages such as long term delivery and high cost. Basic properties test of specimen to be developed and part's requirements after localization was taken and its values were similar or higher when comparing with the original's even in low temp test at -55C. Casting mold process was used to manufacture the polyurethane fairings and its demensional stability ＆ physical condition was proper and met to the related specification and drawing's requirements

• Proceedings of the KIEE Conference
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• 1997.07c
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• pp.1083-1087
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• 1997

Every effort is now being exerted in industrialized and developing countries to reduce emission of greenhouse gases from electric power sector. In this paper, we provide supply-side resource mix strategies in the long-term generation expansion planning under the expected greenhouse gas regulations. Under the environmental regulations, we explore the least-cost generation expansion plan of Korea and determine the composition of future resource mixes. Our analysis is performed on the basis of the revised WASP package which can evaluate emission of carbon dioxide from each power plant. The evaluation process of carbon dioxide emissions, which can consider the efficiency and operating conditions of each generator simultaneously, has been incorporated into the probabilistic production cost simulation module of WASP.

• Proceedings of the KIEE Conference
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• 1988.11a
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• pp.102-106
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• 1988

Generally, average invest cost is widely used for expansion planning of generation in power system. But, other cost which is followed by adding generating capacity in electric system is increased in accordance with increasing plant reasons. In this study, we represent the invest cost with quadratic function and analyze its effect on the expansion planning. It is hoped that this method is used in expansion planning of generating system.

• Korean Journal of Construction Engineering and Management
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• v.19 no.6
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• pp.124-134
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• 2018

Despite the many advantages of modular housing, low preference for modular housing for consumers who are familiar with RC structure leads to high construction cost of modular housing. The cost of modular buildings is about 130% of that of RC structures, so it is urgent to secure economical efficiency of modular buildings. Therefore, in this study, after calculating the savings amount of modular housing by type of construction work, economic analysis was conducted from a long - term perspective. In order to carry out the research, the authors compiled and analyzed the material cost, labor cost, and expenses incurred by each type of work by reclassifying the statement of the modular housing into the factory production and the site installation. After that, Pareto diagrams were created to find a core work that is included in the cost ratio of about 80%, and selected it as a cost reduction subject. Based on the assumption that the market size of domestic modular housing is similar to the level of modular advanced countries such as Japan and European countries, six cost reduction methods were set up that reflects the characteristics of the modular construction method and used for the expert interviews. Cost saving potentials in percentage from the interview were converted to the amount of savings that can be achieved by each type of method when applying the method. Finally, the findings of the study are expected to suggest long-term directions for technical development for modular construction and cost savings.

• Quality Improvement in Health Care
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• v.7 no.1
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• pp.18-31
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• 2000

Background : This study is to identify the inappropriate hospital services for elderly inpatients over 65 years in general hospital with acute care functioning. Consequently elderly inpatient care and the management of long-term care facilities are key issues for current government health policy. Method : The survey was conducted for two months for all inpatients over 65 in 7 general hospitals, 6 work sampling days randomly selected. In each survey day, the subjective judgement by medical staff on the degree of acute care needs and by nursing unit manager on hospital services of each inpatients was also conducted. Result : The total number of cases collected are 2,541 elderly inpatients, according to subjective judgements by medical staff on inpatient condition. However 46.8% of cases are turned out to be non-acute care group. The frequency of medical services provided to non-acute group are 2~3 vital sign checks per day 78.2%, IV injection 40.1%, antibiotics medication 20.2%. Conclusion : Lots of elderly patients' who are staving in acute hospitals, at present need to be transferred to long-term care facilities. However, there was been shortage of long-term care facilities. It is expected to identify the need of elderly inpatients and therefore, to provide cost-effective, appropriate and good quality health services to elderly inpatients depending on their needs.

• New & Renewable Energy
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• v.7 no.2
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• pp.28-35
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• 2011

Recently, photovoltaic systems have been devolved into much larger systems up to MW-scale. Photovoltaic industry participants give their focus on power generation capability of photovoltaic modules because their benefits can be decided from the amount of generation. The information on long-term performance change of photovoltaic modules helps to estimate the amount of power generation and evaluate the economic cost-benefits. Long-term performance of a PV system has been analyzed with operation data for 12 years from 1999 to 2010. In the first year, the amount of yearly power generation was 57.7 MWh with 13.2% capacity factor. In 2007, the amount of yearly generation was 44.3 MWh with 10.14% capacity factor, and in 2010, the amount was decreased down to 38.1 MWh with 8.7% capacity factor. The result means that long-term capacity factor has been 4.5% decreased for 12 years and that the amount of generation has been decreased 34.0% for 12 years which is 2.8 % per year. The latter capacity factor has been decreased faster than 0.20%, the average rate for 10 years. The performance decrease of the PV system is meant to be accelerated. The decrease of performance and utilization is due to aged deterioration of photovoltaic modules and lowering conversion efficiency of PCS.

• Journal of Korea Society of Industrial Information Systems
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• v.12 no.4
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• pp.169-181
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• 2007

This paper investigated the role of transportation in increasing logistics service quality and effect of logistics service quality on the long term orientation of the supply chain partnership. Four primary dimensions were identified through a comprehensive literature review. The common dimensions included information sharing, the sharing of risks and rewards, cooperative continuous improvements on cost reductions and increased quality. The results of the data analysis indicated that transportation were perceived to play an important role in logistics service quality that effecting on the long term orientation. This provides useful insight for making further conclusions concerning the actual roles of transportation within partnerships.

• Journal of Korean Public Health Nursing
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• v.24 no.2
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• pp.211-225
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• 2010

Purpose: This comparative study analyzed information systems including manpower, contents of service, clients, and costs among four nations. Methods: A literature review of relevant publications from Korea, United States, Japan, and Germany supported the use of several plans to activate home nursing care services under the long-term care insurance system in Korea. Results: Korean home nursing care services require quality improvements. The results indicated that a rule is necessary that rations simple visiting service and home nursing care services under the long-term care insurance system, that an integrated management system for elderly care is required, and that the revised delivery of services needs to establish and reflect on various factors to estimate the value in a home visiting nursing care cost system. Conclusion: The data should be valuable in establishment of home nursing care services under the long-term insurance system in Korea.

• The Journal of Asian Finance, Economics and Business
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• v.6 no.2
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• pp.75-82
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• 2019

The paper aims to investigate the impacts of long-term savings motives on fostering household participation and contribution to savings mechanisms in rural Vietnam. The paper is organized in five parts: introduction, data description, methodology, empirical results, and conclusion. The quantitative methodology is employed and three simultaneous estimation methods, including instrumental variable model, two-step model, and Heckman model are used to test these impacts as well as the robustness of results. In each model, the paper examines the impacts of independent factors on both household participation and household contribution to savings mechanisms. Two sets of independent variables: long-term savings motives (profit-making investment, accumulation for big expenditure, providing for old age, and cost of educations) and control variables (dependency rate, number of people in household, and household wealth) are in each model. A set of dataset of 2,314 households for analysis is obtained from household survey in rural Vietnam. Robust statistical findings indicate that profit-making investment emerged to be the strongest motive fostering household participation to savings mechanisms while other long-term savings motives have little or no impact on fostering household participation to savings mechanisms. In addition, education investment encourages household contribution to savings mechanisms in rural Vietnam.

• The Journal of the Korea Contents Association
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• v.12 no.8
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• pp.283-299
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• 2012

The aim of this study is to develop strategies activating long-term care visiting nursing. The research design was a descriptive survey study, and the data were collected from the visiting nursing center managers, customers, and long-term care insurance staffs. The major results were as follows. To activate the long-term care visiting nursing, first, the basic nursing care for ensuring sustainable health management has to be included. Second, the visiting nursing must be designated as mandatory use in standard guideline for using long-term care services. Third, the insurance pricing of visiting nursing must be based on the cost of visiting nursing. And, last, using a visiting nursing must be possible without a doctor's order sheet, when it is required for the assessment of patient's health status.