• 정보교육학회논문지
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• 제14권2호
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• pp.219-227
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• 2010

교과의 정체성은 해당 교과에 내포된 교육적 가치에 대한 다양한 정당화를 통해 가능할 것으로 보인다. 그러나 정보교과는 기초학문으로서 필요의 극대화에도 불구하고 교과로서의 가치를 인정받지 못하고 있는 면이 적지 않다. 특히 개정교육과정에서는 교육과정과 교과서가 있음에도 불구하고 정작 학교 교육에서는 외면당하고 있는 실정이다. 이에 본 연구는 정보교과의 교과교육으로서 가치를 컴퓨터과학교육의 측면에서 논의하였다. 그리고 컴퓨터과학교육의 특성을 토대로 교과로써 가치와 목적에 대한 교육적 성찰을 제공하였다.

• 한국경영과학회지
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• 제12권1호
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• pp.157-157
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• 1987

Hydro-electric power generation from multi-purpose dams has been playing important roles in the electric power supply network in Korea. Although the total share of hydro power in national electricity supply now becomes very small, the peak-shaving and frequency control capability of hydro power helps the power company enormously in maintaining the quality of power. But since the company that builds and operates the multi-purpose dams in Korea has to sell all the electricity produced to the monopolistic utility, there have been various problems in justifying the investment, designing pricing mechanism, and controlling operations of the power plants. In addition, economic evaluation of the hydro power has been distorted by a variety of reasons and hence it has been very difficult to encourage effective development and utilization of national water resources. To make the problem worse, both parties are public companies with X-inefficiency problems. Thus, changing environment requires to reengineer the system that governs hydro power generation. We address the problems of Korean hydro-electric power generation system in four areas: the investment justification process, the operations decison right of the hydro power plants, the pricing of the purchased-power, and the negotiation of contract revision. Then we propose improvement directions of new hydro-electric power system in view of static and dynamic efficiency, X-inefficiency and equity.

• 경영과학
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• 제12권1호
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• pp.157-173
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• 1995

Hydro-electric power generation from multi-purpose dams has been playing important roles in the electric power supply network in Korea. Although the total share of hydro power in national electricity supply now becomes very small, the peak-shaving and frequency control capability of hydro power helps the power company enormously in maintaining the quality of power. But since the company that builds and operates the multi-purpose dams in Korea has to sell all the electricity produced to the monopolistic utility, there have been various problems in justifying the investment, designing pricing mechanism, and controlling operations of the power plants. In addition, economic evaluation of the hydro power has been distorted by a variety of reasons and hence it has been very difficult to encourage effective development and utilization of national water resources. To make the problem worse, both parties are public companies with X-inefficiency problems. Thus, changing environment requires to reengineer the system that governs hydro power generation. We address the problems of Korean hydro-electric power generation system in four areas: the investment justification process, the operations decison right of the hydro power plants, the pricing of the purchased-power, and the negotiation of contract revision. Then we propose improvement directions of new hydro-electric power system in view of static and dynamic efficiency, X-inefficiency and equity.

• 한국농공학회지
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• 제35권3호
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• pp.23-35
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• 1993

The objectives of this paper were to validate the proposed network flow model using field data and to demonstrate the model applicability for various purposes. The model was tested with data from the Banweol watershed, where an intentive streamflow gauging system has been established. Model parameters were not calibrated with field data so that it can be validated as ungaged conditions. Three different schemes were employed to represent the drainage system of the tested watershed : a single, complex, and detailed network. The single network assumed the watershed as a cell, while complex and detailed networks considered several cells. The results from different schemes were individually compared satisfactorily to the observed daily stages at the Banweol reservoir located at the outlet of the watershed. The results from three schemes were in close agreement with each other, Justifying that the model performs very well for different network schemes being used. Daily streamflow from three network schemes was compared for a selected reach within the watershed. The results were very close to each other regardless of network formulation. And the model was applied to simulate daily streamflow before and after the construction of a reservoir at a reach. The differences were discussed, which reflected the influences of the dam construction upon the downstream hydrology. Similar appliocations may be possible to identify the effects of hydraulic structures on streamflow.

• 노동경제논집
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• 제37권4호
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• pp.89-112
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• 2014

본고는 사회적 형평성과 효율성의 관점에서 직접지원(grant)과 소득연계상환식 학자금융자(ICL)를 결합한 정부의 바람직한 대학교육 지원체계를 이론적으로 제시한다. 교육투자 위험이 큰 경우에는 소득연계상환식 학자금 융자(ICL)가 일반적 학자금 융자에 비해 지원 수혜자의 초기 소득과 관계없이 바람직함을 보인다. 그리고 그 조달 방식이나 운영에 있어서는 민간 자본시장을 통해 위험 프리미엄을 포함하는 대출이자로 조달하는 것보다는 정부에 의한 조세조달 방식이 적정함을 주장한다. 현행 학자금 융자제도가 ICL을 초기 소득 수준별로 선별적으로만 도입하고 있어 개선이 필요하다는 점과 ICL의 현행 조세조달 방식을 정당화하고 있다는 점에서 본고는 일정부분 정책적 함의를 갖는다.

• Advances in Traditional Medicine
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• 제7권2호
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• pp.150-156
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• 2007

Bacopa monnieri is being used in the traditional system of medicine for a variety of ailments. In the present study, the ethanolic extract of Bacopa monnieri aerial parts has been studied for its wound healing activity using various models in rats. Significant increase in wound contraction and skin breaking strength were observed in the excision and incision wound models respectively. There was also significant increase in hydroxyproline content, DNA content, superoxide dismutase activity, catalase activity, glutathione level and decrease in the level of thiobarbituric acid reactive substances in the $12^{th}$ day post wounding tissue of experimental rats in the ethanol extract treated groups with respect to the control group. The effect of the extract was found to be comparable with the standard drug nitrofurazone. From the results it may be concluded that the plant Bacopa monnieri is endowed with significant wound healing activity, thereby justifying its use in the traditional medicine. Saponins may be responsible for the observed wound healing activity.

• 한국인터넷방송통신학회논문지
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• 제10권5호
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• pp.105-111
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• 2010

본 논문에서는 결함추출 알고리즘을 퍼지이론을 적용하여 유연성을 제시하고 실험을 통하여 타당성을 확인 하였다. 균열의 검출츨 위하여 퍼지형태학을 이용한 기본 연산자를 정의하였다. 이 연산자를 기초로 하여 퍼지집합에 대해 ${\lambda}$-퍼지척도를 이용하여 무게중심을 구하여 결함을 추출하였다.. 결함추출 알고리즘의 경우 양호한 결과를 낼 수 있었다. 하지만 균열이 매우 미세한 경우 영상 획득부분에 해당하는 조명장치를 얼마나 잘 설계하느냐가 중요하였다. 소프트웨어적으로는 룩업테이블을 사용하여 메모리의 사용을 최소화 시켜 좀 더 빠른 검사속도를 꾀하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 추계학술대회 논문집 학회본부 A
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• pp.180-183
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• 2000

The Battery Energy Storage System(BESS) has lots of advantages such as load levelling, quick response emergency power(spinning reserve), frequency and voltage control, improvement of reliability, and deferred generation and transmission construction. The economic feasibility requires justification from the customer side of meter to promoting the dissemination of BESS nationally. In this paper, we proposed the economic assessment model of customer owned Battery Energy Storage System(BESS) which is complemented and improved the existing model. The proposed model is applied to the typical customer type(light-industrial commercial, and residential) which are taken from the statistical analysis on the load profile survey of Korea Electric Power COmpany (KEPCO). The economic assessment performed for each customer type to justifying their economic feasibility of BESS installation from the economic measures such as payback period, overall benefits, ROI, and ROR. The results of this paper are useful to the customer investment decision making and the national energy policy & strategy.

• 논리연구
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• 제12권2호
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• pp.59-88
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• 2009

귀납추론은 연역추론이 아니기 때문에 연역적으로 정당화될 수 없다. 또한 귀납추론을 귀납적으로 정당화하는 것은 순환적이다. 따라서 흄은 귀납추론을 합리적으로 정당화할 수 없다고 주장한다. 흄이 이와 같은 귀납의 문제를 제기한 이후 오랜 동안 많은 철학자들이 이 문제를 해결하고자 시도해 왔다. 그럼에도 불구하고, 아직껏 대다수의 철학자들이 동의하는 해결책이 제시되지 않고 있다. 셀라스에 따르면 귀납의 문제는 이론추론이 아니라 오직 실천추론을 통해서만 해결할 수 있다. 이 논문은 셀라스가 제안한 실천추론에 의한 귀납의 정당화를 좀 더 명확한 형태로 발전시켜 설명함으로써 그의 해결책이 귀납의 문제에 대한 근본 해결책임을 주장한다.

• Journal of Preventive Medicine and Public Health
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• 제24권4호
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• pp.473-484
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• 1991

Hospitals have been very susceptable to changes in external environment. Accordingly, they have been experiencing great financial difficulty due to low insurance rates and increasing competition. As a remedy, hospitals have attempted to use computer in a strategic manner. Such system is called strategic information system(SIS), and order communication system(OCS ) is an example of SIS in hospital setting. While OCS has known to be effective in reducing waiting time for outpatients, many hospitals are reluctant to introduce this system mainly because there are no real data or methods for justifying the cost of the system. Cost-benefit analysis has been traditionally used for such purpose, but this method deals with limited portion of benefits and therefore not very useful for analyzing the economic feasibility of SIS. In this paper, information economics tools which expand cost with value was used to analyze the economic feasibility of OCS. To assist the analysis, financial simulation model was developed using simulation package, called IFPS(Interactive Financial Planning System).