• Journal of Korea Multimedia Society
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• v.16 no.10
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• pp.1230-1237
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• 2013

Cyber lectures were expected to replace the traditional classroom lecture, yet they were criticized due to the inefficiency. With educational technology supplemented, cyber lectures have improved their efficiency through the coherence of superior planning ability and improvement in computer and network technology. This paper's purpose is to understand the factors that improve educational efficiency of cyber lectures. Cyber lecture for IT subject for software practice is created to test the educational efficiency as lecture on theories will not distinctively show the lecture efficiency. The survey was conducted to students and statistical analysis was done on collected data to analyze the factors that influence educational efficiency of created lecture.

• The Journal of the Korea Contents Association
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• v.7 no.6
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• pp.195-205
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• 2007

The steel industry plays an important role in the entire Korean Economy. However, little empirical research has analyzed the efficiency of steel companies. The purpose of this paper is to measure and analyze their efficiency using DEA models. We evaluate the CCR and BCC efficiency and the return to scale of 28 Korean steel companies. We also provide their envelopment map and the projection, which are valuable information for inefficient companies to find benchmarking companies and to improve their efficiency.

• KDI Journal of Economic Policy
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• v.28 no.1
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• pp.49-93
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• 2006

This paper conducts an empirical analysis on the effects of bancassurance on stability and efficiency of the Korean banking industry. The stability and the efficiency are measured using Z-score and composite functional form based on the annual data of 2000 to 2004 for all domestic banks and insurance companies. The stability test indicates that expansion of bancassurance decreases the stability of banks. Furthermore, the efficiency test implies that with the extension of bancassurance, the cost efficiency declines while revenue efficiency rises, which results in an overall increase of profit efficiency.

• Journal of the Korean Society for Railway
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• v.12 no.4
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• pp.542-547
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• 2009

The objective of this paper is to measure the relative technical efficiency of Korean railway transport service. Previous studies on the efficiency in Korean railway service have carried out before the structural reform of Korean railway industry in 2004, whereas this study used the latest data which reflected the impact of reform. We analyzed the efficiency in Korean railway transport by means of measuring the technical efficiencies of other countries, these were estimated with data envelopment analysis. Using data from 22 railway operators over the period $2000{\sim}2006$, the results indicate that the Korean railway transport has been operated efficiently as compared with others.

• Spatial Information Research
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• v.19 no.1
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• pp.93-105
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• 2011

In recent years, large and complex three-dimensional building has been constructed by the development of building technology and advanced IT skills, and people have lived there and spent a considerable time so far. Accordingly. in this sophisticatcd three-dimensional space, emergencies services or convenient information services have been in demand. In order to provide these services efficiently, understanding of topological relationships among the complex space should be supported naturally. Not on1y each method of understanding the topological relationships but also its efficiency can be different depending on different topological data models. B-rep based data model is the most widely used for storaging and representing of topological relationships. And from early 2000s, many researches on a network based topological data model have been conducted. The purpose of this study is to verify the efficiency of performance on spatial queries. As a result, Network-based topological data model is more efficient than B-rep based data model for determining the spatial relationship.

• Journal of Korean Society of Transportation
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• v.21 no.4
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• pp.113-132
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• 2003

Using nonradial data envelopment analysis(DEA) under assumptions of strong disposability and variable returns scale, this paper annually estimates productive. technical and allocative efficiencies of three publicly-owned rail transit properties which are different in terms of organizational type: Seoul Subway Corporation(SSC, local public corporation), the Seoul Metropolitan Electrified Railways sector (SMESRS) of Korea National Railroad(the national railway operator controlled by the Ministry of Construction and Transportation(MOCT)), and Busan Urban Transit Authority (BUTA, the national authority controlled by MOCT). Using the estimation results of Tobit regression analysis. the paper next computes their true productive, true technical and true allocative efficiencies, which reflect only the impacts of internal factors such as production activity by removing the impacts of external factors such as an organizational type and a track utilization rate. And the paper also computes an organizational efficiency and annually gross efficiencies for each property. The paper then conceptualized that the property produces a single output(car-kilometers) using four inputs(labor, electricity, car & maintenance and track) and uses unbalanced panel data consisted of annual observations on SSC, SMESRS and BUTA. The results obtained from DEA show that, on an average, SSC is the most efficient property on the productive and allocative sides, while SMESRS is the most technically-efficient one. On the other hand. BUTA is the most efficient one on the truly-productive and allocative sides, while SMESRS on the truly-technical side. Another important result is that the differences in true efficiency estimates among the three properties are considerably smaller than those in efficiency estimates. Besides. the most cost-efficient organizational type appears to be a local public corporation represented by SSC, which is also the most grossly-efficient property. These results suggest that a measure to sort out the impacts of external factors on the efficiency of rail transit properties is required to assess fairly it, and that a measure to restructure (establish) an existing(a new) rail transit property into a local public corporation(or authority) is required to improve its cost efficiency.

• Journal of Korea Port Economic Association
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• v.38 no.1
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• pp.113-127
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• 2022

The purpose of this study is to analyze the efficiency of 90 domestic passenger shipping routes using the DEA Window model as a Decision Making Unit (DMU). Data from 2015 to 2019 are divided into three windows, and efficiency was analyzed by using the number of passenger ships of sails, gross tonnage and distance traveled as input variables and transportation performance of the general public and islanders as output variables. As a result of the analysis, improvements are derived and presented for routes with low relative efficiency. In particular, the efficiency is evaluated for general routes operated by private operators as profit routes and auxiliary routes supported by the government as non-profit routes. In addition, scale efficiency (SE) is derived by using the technical efficiency (TE) of the CCR model and the pure technical efficiency (PTE) values of the BCC model. It is found that the inefficiency of the route was due to pure technical efficiency (PTE) rather than scale efficiency (SE). It will be necessary to consider the improvements for each route shown in the analysis results of this study when establishing the policy for the domestic passenger shipping route.

• Journal of the Korea Society of Computer and Information
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• v.5 no.2
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• pp.158-164
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• 2000

The purpose of this study is concerned with evaluating management performance in electronics and communication companies using DEA(Data Envelopment Analysis) DEA is a linear programming based technique for measuring the relative performance of organizational units where the Presence of multiple inputs and outputs makes comparisons difficult. In this research. input variables are raw-material costs, number of employees, and production capacity Real production, sales revenue and net earning are suggested as output variables. Management performance of most companies are increased or equal during 97 and 98 fiscal year and input & output variables show high correlation.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 1997.03a
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• pp.89-106
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• 1997

현재 웹(Web)상에서 운용되고 있는 검색엔진의 활용실태에 관한 체게적 검토를통해 각 엔진에 대한 가능을 비교·분석함으로써 각각의 특징과 효율성을 평가해보고자하였다. 효율적인 검색을 위해서는 각 검색엔진의 특성을 파악하여야 하며 얻고자 하는 정보의 특성(정보분류, 사용분야, 정보 형태 등)에 의해서도 검색엔진의 선별이 필요하다. 검색엔진들은 자신만의 독특한 검색방법을 지니고 있으며 사용자 인터페이스, 질의(Query)의 형태와 검색결과에 차이를 보일 수있다. 그러나 이들 검색엔진의 효율성을 비교하기 위한 기준은 아직까지 정립되지 않았으며 학문적으로 검증된 명확한 기준이 없다. 따라서 본 연구에서는 검색엔진의 효율성 비교를 위해 현재 인터넷상에서 통용되고 있는 검색능력평가에 관한 보고서들에서 평가기준으로 삼고있는 기준들을 수집, 분석한후 가장 타당한 것으로 평가기준들을 선정, 체계화하는 작업을 선행하였다. 그리고 각 검색엔진의 검색효율성을 평가하여 그 결과를 분석함으로써 최적의 검색엔진 선택과 정확한 정보의 검색 및 활용에 일조하고자하였다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.347-348
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• 2023

본 연구에서는 다년간 계속되어 온 공기업의 개혁 성과에 대해 경영효율성 관점에서 살펴보고자 한다. 공기업을 포함한 공공기관의 개혁 움직임은 부채 수준의 급증 문제에서 시작되었으며, 방만 경영으로 대표되는 비효율적인 경영방침이 지속된다면 미래 정부에 큰 부담으로 작용할 것으로 우려되었기 때문이다. 공공기관의 효율적 경영은 자료포락분석에 의한 DEA로 측정하능하며, 본 연구에서는 DEA의 시계열적 변화를 살펴봄으로써 공공기관이 개혁과정이 성공적이라 평가할 수 있는지 점검해보고자 하였다. 또한, 매년 발표되는 경영평가결과를 바탕으로 우수 공공기관과 그렇지 않은 공공기관에서 이러한 시계열적 추세에 차이가 존재하는지를 살펴보아 향후의 공공기관 개혁에 방향성을 제시할 수 있는 보다 명확한 분석결과를 제시하고자 한다. 본 연구의 결과는 공공기관의 성공적인 개선을 이루기 위한 중간점검 차원에서 이해될 수 있으며, 비효율성을 개선하기 위해 어떠한 기관이 더욱 노력해야 하는지에 대한 답을 제공할 것으로 기대된다.