• Health Policy and Management
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• v.6 no.2
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• pp.115-130
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• 1996

This study was performed to investigate the practical oriental medical expenses by the use of internal data of an oriental hospital due to the bias of medical insurance program data. The purpose of this study was to describe prevalent diseases of clinical department in the studied hospital, to analyze medical expenses structure and to verify the each cost share ration of expenses on insurer to insuree. Under this purpose, we analyzed actual medical expenses data of 1,611 hospitalized patients of the oriental medical university hospital with 150 beds that can be approached to internal data from Jan. 1, 1994 to Dec. 31, 1994. The major findings are as follows : 1. Upper five of most frequent diseases of admitted patients were Joul-Jung-Pung(55.5%), Yoo-Kak-Tong(7.3%), Yoo-/Tong(7.1%), Gu-An-Wa-Sa(2.7%) and sequale of Joul- Jung-Pung(2.4%) 2. In medical expenses structure, hospital ward fee was 47.1%, medication fee 41.3%, fee for procedure(acupuncture, moxibustion, negative therapy, physical therapy, etc) 11.1% and consultation fee 0.5%. In addition to the cost share ration of insuree & that of insurer was 75:25 respectly.

• The KIPS Transactions:PartD
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• v.13D no.5 s.108
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• pp.717-724
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• 2006

The cost estimation of software is getting more important as the portion of software is increasing in acquiring weapon systems. However, the cost estimation of embedded software in a weapon system follows the cost estimation method for general purpose softwares and uses the PRICE S model as a tool. However, any validation result of the estimated cost through an evaluated software size is not well known. Hence, we propose an approach to estimate the cost through evaluating the embedded software site in weapon systems. In order to achieve our research goal, we evaluate the software size of using the line of codes and function points which are produced by the PRICE S model. Finally, we compare the estimated cost data the actual cost data provided by the production company. As a result, we propose an approach to estimate the size and the cost of embedded software in weapon systems which are not easy to estimate objectively. We also expect that the Proposed approach is used for the cost validation and negotiation in the acquisition of weapon systems in the future.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2004.11a
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• pp.207-212
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• 2004

The propose of this study is to grasp actual status and needs of leisure of middle age. The questionnaire survey is used, the subjects are middle age from 40${\sim}$50's living in big city. The questionnaire consists of leisure, leisure actual condition, leisure satisfaction and need. Frequency, percent, average, x2-test, t-test and ANOVA are used for data analysis. The results of this study are as following; First, leisure is necessary to elevate Quality of life in terms of spiritual , psychological stability and physical health. Second, subjects have more leisure time in weekend the characteristics of leisure time are scattered in woman. Third, in the future the subjects wish to have leisure with family. Therefore, it is necessary to develop leisure program and facilities to promote family leisure. Fourth, the subjects are not satisfied with current leisure for unsufficiency of leisure time, cost, facility and program. Fifth, present leisure behavior characteristics are restrictive and passive. In the near future, however, they showed desire to engage in divers forms of leisure including active and participant leisure.

• 한국연소학회:학술대회논문집
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• 2012.04a
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• pp.77-78
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• 2012

To predict combustion instability in actual full-scale combustion chamber of rocket engines, air-injection test is proposed with scaling techniques. From the data, damping factors have been obtained as a function of hydraulic parameter and the data give us instability map. Two instability regions are presented and it is found that they coincide reasonably with them from hot-fire test with full-scale flow rates. Accordingly, the proposed approach can be applied cost-effectively to stability rating of jet injectors when mixing of fuel and oxidizer jets is the dominant process in instability triggering.

• Korean Institute of Interior Design Journal
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• no.29
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• pp.249-256
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• 2001

The Purpose of this study is to Provide a basic data for Projects of residential bathroom remodeling according to contemporary life style. The subjects of this investigation are collected through questionnaire from adult resident who live in Seoul Korea. Four hundred ten cases are collected, and frequencies, percentile, crosstabs, and factor analysis and varianc analysis using Spss-win program analyze adequate cases in necessary condition. In this study, residents demographic informations, bathroom preferences, types, sizes, cost construction period, instruments needs, behaviors and facilities seperation are included. By statistics treatment, the significance of the data is analyzed.

• Journal of Korean Society of Transportation
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• v.22 no.7 s.78
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• pp.41-48
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• 2004

We may consider the inducement of demand to public transportation as a solution to relieve traffic congestion and pollution. Subway has merits as moving on schedule, transporting more people than bus. But subway is required a vast investment in the early stage of construction has a huge debt. So it runs into red figures, and on this account, services of subway are falling more and more. Development of subway's operation cost function is useful to understand structure of subway's operation and catch the relations of operation cost and actual results. In addition, we can present the policy that is a helpful to the operation as development of operation cost function. But there are short of studies about operation cost deal with a subway comparison with local train. Because local train has many lines and data, on the other hand, subway has one to four lines and less data. Most of previous studies sought the operation cost function of Seoul. So this study aimed to develop and apply the operation cost function of Seoul, Incheon, Busan and Daegu area using full allocation method. In this study, we considered the number of passengers, track-km, train-km, revenue as actual results. By appling the operation cost function, we compared the average cost of each city and confirmed the existence of economies of scale about the number of passengers, train-km.

• Structural Engineering and Mechanics
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• v.33 no.5
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• pp.589-604
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• 2009

In the field of predicting structural safety and reliability the operating conditions play an essential role. Since the time and cost limitations are a significant factors in engineering it is important to predict the future operating conditions as close to the actual state as possible from small amount of available data. Because of the randomness of the environment the shape of measured load spectra can vary considerably and therefore simple distribution functions are frequently not sufficient for their modelling. Thus mixed distribution functions have to be used. In general their major weakness is the complicated calculation of unknown parameters. The scope of the paper is to investigate the load spectra growth for actual operating conditions and to investigate the modelling and extrapolation of load spectra with algorithm for mixed distribution estimation, REBMIX. The data obtained from the measurements of wheel forces and the braking moment on proving ground is used to generate load spectra.

• Journal of the Korean Society for Precision Engineering
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• v.13 no.1
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• pp.98-107
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• 1996

The use of composite hyperpatch model is proposed to predict a machine tool positional error over the entire work space. This is an appropriate representation of the distorted work space. This model is valid for any configuration of 3-axis machine tool. Tool position, which is given NC data or CL data, contains error vector in actual work space. In this study, off-line compensation scheme was investigated for tool position error due to inaccuracy in machine tool structure. The error vector in actual work space is corrected by the error model using Newton-Raphson method. The proposed error compensation method shows the possibility of improving machine accuracy at a low cost.

• Journal of KIISE:Software and Applications
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• v.31 no.5
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• pp.555-562
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• 2004

Software industry has put more emphasis on maintenance and enhancement work than on the new development. The existing effort estimation models can still be applied to maintenance projects, though modifications are needed. This paper suggests a way to estimate the size of a maintenance project from the regression analysis of ISBSG's benchmarking data. First of all, among the 3 elements(addition, modification and deletion of the program) which influences the software cost, we selected and classified 4 groups from a total of 8 which shows actual maintenance cost from ISBSG's data. Moreover, we developed statistical model and a model which uses RBF(Radial Basis Function) Network and after evaluating each functions we concluded that the RBF Network is superior to the statistical model.

• Asian Journal of Business Environment
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• v.14 no.2
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• pp.11-18
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• 2024

Purpose: The purpose of this study is to empirically evaluate the unintended welfare losses induced by paid sick leave, examine the severity of the unintended moral hazard loss caused by paid sick leave, and evaluate how much moral hazard cost society can accept to obtain paid sick leave benefits. Research Design, Data and Methodology: We examine the Medical Expenditure Panel Survey data collected in 2013 and 2014 by employing a panel probit analysis to control for individual heterogeneity. Results: The estimation result shows that the probability of absence due to paid sick leave increases from 4.91% to 7.84%. Among them, excluding the probability of increasing absence from 1.29% to 2.69% due to the actual disease, the probability of absence due to the moral hazard was estimated to be 2.41% to 6.49% in the proposed models. Based on the result, if we evaluate the increase in absence caused by moral hazard as a social cost, the estimated cost is approximately $174 to $297 per worker per year. Conclusion: Considering these expected costs, our society can obtain the access benefit from paid sick leave if we are willing to accept the moral hazard cost.