• Journal of Digital Convergence
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• v.11 no.10
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• pp.255-262
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• 2013

Data envelopment analysis(DEA) is a linear programming procedure designed to evaluate the relative efficiency of a set of peer entities called decision making units which use the same inputs to produce the same outputs. It has been widely employed in a variety of disciplines as an efficiency or performance measurement tool for comparing a set of entities such as firms, banks, hospitals, nations and organizations. The method, however, cant's make the priority of their performance when many units have efficiency score of unity or 100 percent. In this paper, we propose a new approach which combine qualitative method(graphical approach using network analysis) and quantitative method(super-efficient analysis using DEA), and present the results of an empirical analysis using the data of the Korean professional baseball players. As a result, there were 12 DMU that priority is hardly realized through DEA. However, this problem could be solved with super-efficiency analyzing. Also, more in-depth interpretation was able through integrating results of dendrogram and super-efficiency analyzing and prospecting it in qualitative, quantitative ways.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.13 no.5
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• pp.129-136
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• 2003

A representative payment broker system is SET and one of its signature shcemes is a dual digital signature scheme. A dual digital signature scheme expose neither user's payment information(credit card number etc.) to merchandiser, nor user's order information to bank So it keeps user's Privacy safe. The digital signature scheme like this is being necessary as E-commerce is revitalized. But a dual digital signature of SET is not appropriate for wireless environments because it needs so many computations and communications. In this paper, we propose a signcryption scheme that generates a polynomial using a payment information for merchandiser and an order information for bank in order to reduce communications. We analyze the problem of existing signcryption schemes and dual digital signature schemes. Also we analyze the security properties of the proposed scheme.

• 한국벤처창업학회:학술대회논문집
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• 2018.04a
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• pp.67-74
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• 2018

소상공인 창업자들이 자금조달의 대부분을 은행 대출에 의존하고 있는 가운데 소규모 자금 조달을 필요로 하는 이들을 위해 핀테크 기반의 새로운 금융서비스를 통해 소상공인 창업자의 금융 공급을 확산할 필요가 있다. 이러한 환경 변화 패러다임에서 본 연구는 빅데이터와 핀테크 솔루션의 활용이 소상공인의 매출과 금융지원에 미치는 영향을 살펴보기 위해 실제로 공공과 민간의 상권빅데이터자료를 수집하여 분석을 수행하였다. 이를 통해 소상공인에 대한 금융혜택 증대를 위한 사업장의 매출증대 등 소상공인 창업자의 사업성 평가에 필요한 주요변수들을 상권빅데이터를 실증적으로 분석하여 효과성을 검증하는 것이 본 연구의 목적이다. 특히 자금의 대부분을 정책자금을 통해 조달하는 소상공인들이 일반 은행에서도 중소기업 대출의 하나로 비중 있게 이루어질 수 있도록 기존에 활용되지 못한 빅데이터 변수들을 탐색하여 소상공인의 경쟁력 향상을 위한 효율적인 금융지원이 가능함을 확인하고자 하였다. 본 연구에서는 소상공인 창업자의 대출 등 금융지원 확대를 위한 사업성 평가에 상권빅데이터의 활용 가능성이 있는지를 중심으로 문헌적 연구방법 연구와 실증적 분석을 병행하였다. 본 연구는 핀테크와 빅데이터의 활용이 향후 소상공인 자금 조달의 발전 방향이 어떻게 되어야하는지를 모색해야하며, 소상공인을 포함하는 중소기업 신용평가방식의 발전 방향을 구체적으로 모색되어야 할 시점임을 의미하고 있다.

• KDI Journal of Economic Policy
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• v.16 no.1
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• pp.119-148
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• 1994

본(本) 연구(硏究) 1960년대말 이후 1980년대초 기간중에 민영화(民營化)된 공기업(公企業)에 대하여 민영화(民營化)가 개별기업(個別企業)의 생산효율성(生産效率性)에 미친 효과를 회귀분석모형(回歸分析模型)에 의하여 추정하고, 추정결과를 토대로 향후 정부의 바람직한 민영화정책의 방향을 제시하고자 한다. 본(本) 연구(硏究)의 분석결과(分析結果), 공기업민영화(公企業民營化)는 대한통운, 대한항공, 대한재보험, 그리고 대한석유공사의 경우 개별기업의 생산효율성(生産效率性) 증진(增進)에 긍정적인 효과를 미쳤으나, 5대(大) 시중은행(市中銀行)의 경우 공기업민영화(公企業民營化)가 기업(企業)의 생산효율성(生産效率性) 제고에 미친 효과가 미미하여 통계적 신뢰성이 낮게 나타나거나 부정적(否定的)인 효과(效果)가 추정(推定)되었다. 이러한 분석결과(分析結果)에 근거할 때, 기업민영화(公企業民營化)가 항상 기업(企業)의 생산효율성(生産效率性) 증가(增加)에 기여할 것이라는 일반적인 믿음은 현실적안 근거가 부족하며, 일정한 조건이 충족되어야 그러한 믿음이 현실화될 수 있음을 알 수 있다. 민영화(民營化)가 바람직한 정책효과(政策效果)를 나타내기 위해서는 공기업민영화시(公企業民營化時) 기업소유권(企業所有權)의 민간이전뿐만 아니라 실질적인 경영권(經營權)의 이전이 수반되어야 하며, 민영화(民營化)와 더불어 정부(政府)의 각종 규제(規制)와 간섭(干涉)이 배제되어야 한다.

• The Journal of Korean Association of Computer Education
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• v.3 no.1
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• pp.117-126
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• 2000

The development of information system and communication gave us new education model, called remote education. And the remote education, being free from constraint of time and space and using various multimedia resources, has helped and substituted public educations, and has enlarged the area because of a lot of advantages and educational possibility compared to public educations. But it is very insufficient to study on analysis system which can analyze the learner and improve the educational process compared to various contents and education methods. In this study, we realized web-based item pool system which can remove the inefficiency of making duplicated and one-time used questions and which can manage and evaluate learners' achievements more efficiently. This program can give us quality improvement of remote education by raising efficiency of production with various pattern of paper making and item pool type management of items made and by executing high quality analysis with various pattern to the learner.

• Journal of Technology Innovation
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• v.25 no.4
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• pp.1-15
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• 2017

In 2014, the Financial Services Commission designated the Tech Credit Bureaus(TCB) to issue technical credit evaluation reports. The Five credit rating agencies, KEB Hana Bank and others have issued the technical credit reports since the summer in 2014. Meanwhile, the technology evaluation model of KEB Hana Bank consists of 25 detailed evaluation items. These item classes are weighted and the technology rating is systematically. The technology rating is combined with the credit rating to calculate the technology-credit rating. In this paper, we analyzed the 406 evaluation results issued by KEB Hana Bank. Based on the number of years of work experience, company managerial years, technical personnel score, the possession of R&D department, the amount of R&D investment, the number of certifications, and the number of patents, the Correlation between the above items and the technical grade was analyzed. It was found that quantitative indicators such as the presence of R&D department, patent numbers, and R&D investment expenses had a significant effect on the company's technology grade, and in particular, the presence of R&D department was shown a high correlation with the technology rating.

• Journal of Korean Society of Forest Science
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• v.105 no.4
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• pp.422-428
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• 2016

Ginkgo (Ginkgo biloba L.) is one of the most appropriate roadside trees because of a good transplantation nature and ability to grow well in urban environment. Ginkgo is a dioecious species. Sex discrimination of ginkgo is possible through comparing morphological characters of reproductive organs. However, it needs more than about twenty years for reproductive organs to appear after sexual maturity. Until now, ginkgo trees for roadside plantation have been planted without discriminating the sex because ginkgo trees have been usually planted before sexual maturity. Ginkgo nuts from the female ginkgo trees planted along the roadside emit a foul odor, and make much pollution on the streets. Thus in this study a novel SCAR marker (SCAR-GBM) for the early sex discrimination was developed. Primers were developed on the basis of the sequence of male-specific RAPD variants reported previously. False-negative problem of SCAR marker, probably caused by dominant nature, was resolved by using multiplex PCR using primers of both the SCAR-GBM and a universal primer set of atp1 region in mitochondria DNA, which resulted in improved discrimination efficiency. The results showed that DNA bands of 1,039 bp were commonly amplified by the atp1 primer set in male and female trees, and SCAR-GBM markers of 675 bp were specifically amplified only in male trees. Reproducible and specific discrimination of the multiplex PCR was finally confirmed by applying multiple male and female individuals.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10c
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• pp.438-442
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• 2006

최근 금융산업에서 치열한 시장환경 및 다양한 고객 요구사항에 대응하기 위해 채널 및 IT 아키텍처의 재조명이 이슈화되고 있으며, 이때 인터넷 채널은 인터넷에 익숙한 젊은 고객 층의 증가와 편리성 측면에서 이용도가 높아짐에 따라 웹 개인화를 요구하고 있고 콜센터 채널은 마케팅 및 업무효율측면에서 고객접촉이력 정보의 자산화 추세로 중요성이 제고되고 있다. 하지만, 고객중심의 통합 금융시스템의 구현이라는 측면에서 홈뱅킹시대에서의 각기 양 채널은 개별시스템(individual system)으로 개발 및 운영이 되고 있어 상호 운용이 되지 않는 문제점을 내포하고 있고 이를 해결하고자 한다. 따라서, 본 논문의 공헌도는 양 채널간 상호 운용 가능한 SOA(Service Oriented Architecture)기반의 공통 컴포넌트를 도출하고 효율적 채널 활용을 위한 상호 운용성 아키텍처를 제안하는데 그 의의가 있다.

• The Korean Journal of Financial Management
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• v.27 no.1
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• pp.181-208
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• 2010

In July 2007, Korean government has passed "The Capital Market and Financial Investment Services Act" to further develop the capital markets and the Act was to become effective in February 2009. Using a large sample of Korean firms, we have examined (i) the effect of underwriting activities on the firm value (bond spread) comparing commercial bank and investment bank, and (ii) the determinants of the firm value changes following underwriting activities of bank. To test our goal, we collected a wide range of samples of data for bond issuing activities executed by Korean firms listed on the Korea Stock Exchange (KSE) between 2000 and 2003. Our paper is distinguished from previous studies on this subject in a way that we analyzed the effect of corporate bond underwriting activities with regard to commercial banking and investment banking. Initially, we set up a hypothesis that "Certification View" and "Conflict-of-interest View" are major driving forces behind cross-firm differences in performance following bond issuance. We find that, in general, underwriting by investment bank (securities company) brings a positive effect on the firm value (spread between bench mark rate and bond issuing rate). This result indicates that firm value has been negatively affected by the bank underwriting and provides the evidence for "Conflict-of-interest View" in Korea. Our studies have also revealed that any change in firm value following bond issuance is positively related with the firm size (total asset), operating performance, liquidity (cashflow), and equity ownership by foreign investors. Overall, our results support the view that bank underwriting activities can play an important role in determining firm value and financial strategies under "The Capital Market and Financial Investment Services Act" of 2007.

• Korean Journal of Environmental Agriculture
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• v.18 no.2
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• pp.179-184
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• 1999

To examine the relationship between air pollution and occurrence of disease in plants, we investigated the alteration of physiology and biochemistry of Ginkgo biloba by inoculating with Coniothyrium sp. and fumigating with 0.1 ${\mu}l/l\;SO_{2-}$ Visual damage did not appear but photosynthesis, $CO_2$ use efficiency(CUE) and water use efficiency(WUE) were reduced when G. biloba was exposed to $SO_{2-}$for 7days (8 hours a day). When inoculated with Coniothyrium sp., the seventies of damage in G. biloba showed a threefold difference between $SO_{2-}$ treatment (SI) and $SO_{2-}$ free treatment (SFI) at day 42 from initial inoculation. Little difference was observed in sugar contents that may be used pathogens feed, among control, SFI and SI. In spite of the reduction in photosynthetic rate, sugar contents and CUE were maintained. WUE was enhanced 13% more at SI than SFI. The $CO_2$fixation boosted because of enhanced WUE, and thus sugar synthesis was not affected. In addition, sugar transport seems to be retarded for some internal alteration. Consequently, the severity of SI was more serious than that of SFI because Coniothyrium sp. easily invades into the physical texture of G. biloba weakened by $SO_2$ fumigation and because sugar was accumulated in leaves of G. biloba.