• Proceedings of the Korea Contents Association Conference
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• 2017.05a
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• pp.365-366
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• 2017

본 논문은 하천을 통과하는 교량과 친수 공간 내 접근성을 쉽게 하기 위해 설치된 인도교에서 발생되는 비점오염을 경감시키고자 중규모의 저감장치를 개발하고 이를 실용화 하기위한 검증과정을 주요 내용으로 한다. 중규모 매립형인 이 장치는 저감효율의 향상을 위해 공정별 여재구성비를 실내실험을 통해 검정하고, 그 결과를 현장설치 실험에 적용하여 저감장치로의 성능을 검증 분석하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04b
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• pp.229-231
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• 2002

최근 생물 유전자 정보에 대한 관심이 커지면서 이를 위한 효과적인 분석 방법이 요구되고 있다. 특히, 분류기의 데이터로 사용하기 위해서 필요한 특징만을 뽑는 과정인 특징 추출은 대량의 유전자 정보에서 의미 있는 정보를 선별하는 중요한 과정이다. 그러나 유전자 정보는 사용되는 데이터의 특징규모가 매우 크기 때문에 일반적인 데이터 마이닝 기법으로는 분석이 힘들다. 본 논문에서는 효율적인 거대규모 특징 추출을 위해 유전자 알고리즘(GA)파 신경망을 사용한 특징추출 방법을 소개하고, 종분화 기법을 사용한 효과적인 특징추출 방법을 제시한다. 그리고, CAMDA 2000에 공개된 암 DNA Microarray로 안종류를 분류하는 문제에 대하여 성능을 평가하였다.

• Korea Trade Review
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• v.43 no.3
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• pp.1-26
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• 2018

This study estimates the technical efficiency and total factor productivity(TFP) of and analyzes the relationship between TFP and exports for Korean manufacturing companies from 2000 to 2016. Specially, TFP is decomposed into Technical Change(TC), Technical Efficiency Change (TEC), and Sale Effect(SE), and compared between large and small enterprises. First, in the case of technical efficiency, the Korean economy has been very vulnerable to external shocks, such as the sharp decline following the 2008 financial crisis. The efficiency of the electronics, automobile, and machinery sectors is low and needs to be improved. In addition, the technological efficiency of large enterprises is higher than that of SMEs in most manufacturing sub-sectors except for non-ferrous metals. In the case of TFP, most changes are due to TC, and the effective combination of labor, capital and the effect of scale have little effect, suggesting that improvement of internal structure is urgent. In addition, volatility due to the impact of the financial crisis in 2008 was much larger in SMEs than in large companies, so external economic impacts are more greater for SMEs than large enterprises. The relationship between TFP decomposition factors and exports shows that TC has a positive effect only on exports of SMEs. Therefore, in order to increase exports, in the case of SMEs, R&D support to promote technological development is needed. In the case of large companies, it is necessary to establish differentiated strategies for each export market, competitor company, and item to link efficiency and scale effect of exports.

• Proceedings of the Korea Water Resources Association Conference
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• 2020.06a
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• pp.241-241
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• 2020

축산물의 수요가 증가함에 따라 가축의 사육규모 및 두수도 증가하여 가축분뇨의 발생량이 증가한다. 가축분뇨는 일반하수에 비해 고농도의 유기물, 질소, 인 등의 오염물질이 포함되어 있다. 적절한 처리 없이 하수처리장 및 수계로 유입될 경우 하수처리장 처리 효율에 영향을 미치거나 부영양화 등 다양한 문제를 야기 시킬 수 있다. 이러한 문제를 해결하기 위해 아질산화 반응을 이용하는 다양한 공정들이 연구되고 있다. 아질산화 반응은 완전 질산화 반응에 비해 질산화 단계에서 약 25%의 산소요구량이 절감되고, 탈질 단계에서 약 40%의 탄소원이 절감되는 경제적 장점이 있기 때문이다. 본 연구에서는 부피 8L의 실험실 규모 아질산화 반응조 원통형 아크릴로 제작되었고, 서울 A하수처리장 미생물을 채취하여 사용했다. 또한 SRT의 영향을 살펴보기 위하여 35℃ 동일 온도를 유지했다. 반응조 슬러지 반송 및 폐기가 없는 완전 혼합 반응조로 SRT와 HRT가 동일하게 운전하는 방법을 사용하여 SRT를 조절하는 방식으로 운전했다. SRT의 경우 8일, 6일, 4일, 2일의 변경조건을 통해서 차이를 살펴보았다. Ammonia Removal Rate(%)의 경우 각각 86%, 86%, 87%, 24%의 효율을 보였고, Nitrite Conversion Rate(%)의 경우 각각 10%, 45%, 80%, 41%의 효율을 보였다. 35℃ 실험실 규모 반응조에서 가축분뇨 유입 원수의 아질산화 반응을 유도하기 위해서는 SRT운전 조건은 4~8일, 고효율의 아질산화 반응을 유도하기 위해서는 SRT 4일 조건이 적합하다고 판단된다. 본 연구는 실제 가축분뇨 처리 효율 상승을 위해서 아질산화 공법을 도입할 경우 중요한 자료로 이용 가능할 것으로 판단된다.

• Knowledge Management Research
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• v.22 no.3
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• pp.151-172
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• 2021

The government's implementation of customer-friendly financial policies, such as lowering commission fees for credit card merchants and lowering the maximum interest rate, put the specialized credit finance companies in a crisis of lowering profitability. In this unfavorable situation, the efficiency study of specialized credit finance companies is meaningful. Accordingly, this study measured the efficiency of 34 specialized credit finance companies through Data Envelopment Analysis (DEA) and meta-frontier analysis. For meta-frontier analysis, specialized credit finance companies were divided into two groups (card companies and non-card companies) by industry or three groups (AA0 and above, AA-, and A+ or below) by credit rating. The results of the analysis will provide general insight into the efficiency of specialized credit finance companies. The results of this study are as follows. First, the average meta-efficiency of card companies was analyzed higher than that of non-card companies. Second, 80% of non-card's decision-making units (DMUs) were inefficient by pure technology rather than by scale. Third, decision-making units (DMUs), which account for 62.5% of the credit card company group and 80% of the 'AA-' credit rating group, are in non-economic areas of scale. Fourth, there was no statistically significant difference in meta-efficiency values (TE and PTE) by industry (card companies, non-card companies) and credit rating (AA0 or higher, AA-, A+ or lower). The contribution of this study will provide strategic initiatives for establishing management strategies to improve inefficiency by measuring the efficiency level of companies under an unfriendly business environment for specialized credit finance companies.

• The Journal of the Korea Contents Association
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• v.17 no.2
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• pp.316-326
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• 2017

In this research, in order to analyze the efficiency of vocational education and training public services, we analyzed 27 projects conducted in Chungcheongnamdo province in 2014 using DEA. Also we compared the efficiency of 2014 projects with 2013 projects, and verified 3 representative DMU's inefficiency to suggest how to improve the efficiency. The DEA examined the efficiency using CCR model, BCC model and SE(CCR / BCC). As a result of this analysis, the total project costs and the number of projects were increased in 2014 from 2013, but it turned out that the number of inefficient projects were increased and the overall efficiency is decreased. Therefore, in order to improve efficiency, we proposed to allocate labor costs and direct project costs appropriately. In the case of large-scale projects, it was confirmed that reducing the scale of the project is important to increase the overall efficiency. Based on this research, we are presenting a research model that analyzes the efficiency of vocational education and training, and expanding the research area of performance management into the area of various public services.

• International Area Studies Review
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• v.12 no.3
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• pp.341-365
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• 2008

This paper investigates the properties and relative importance of Apparel Textile industry of Busan in terms of both the number of employees and the value-added, and then analyzes the relative technical efficiencies from the perspectives of space closeness such as consumption market, suppliers, living standards and clustering environments using the DEA model. The main outcomes are as follows. The Apparel Textile industry is still a key industry in Busan with relatively high intensity and high LQ (greater than one) in spite of the recent decrease between 2000 and 2005 both in the number of employees and the value-added. Those firms with consumption market showed higher efficiency in all kinds of efficiencies than the firms without the market, and further relatively higher efficiency than the firms with suppliers. In addition, the firms located in the higher living standards also showed higher values of efficiency compared with the firms in lower living standards. The policy implication from the results is that the strategic and selective investment should be made according to the relative efficiency and thus the traditional industry should be transformed to the high value added one with additional investment to utilize the scale efficiency.

• 월간 기계설비
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• s.45
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• pp.45-54
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• 1994

건설산업은 국민경제에서 차지하는 비중이 높으며, 향후 지속적으로 대상영역이 확대되고 기능 및 규모가 커질 전망이다. 우리나라 건설기술의 현위치는 선진국 수준을 100을 할때 70정도에 불과하며, 발전속도의 관점에서 국내 제조업에 비해서도 저조한 실정이다. 이는 정부의 기술개발사업에서 건설기술 개발 필요성에 대한 인식의 부족으로 과학 및 산업기술의 개발 필요성에 대한 인식의 부족으로 과학 및 산업기술의 분류에서 독자적인 항목으로 설정되지 않고 있으며, 적절한 예산지원이 이루어지지 않고 있다는 데 문제의 원인이 있다. 민간부분의 경우는 매출액 대비 기술개발비용이 일본과 비슷한 비율이지만, 매출액 규모를 고려해 볼 때, 부가가치 창출 효과를 논하기는 이른 실정이다. 한편, 건설산업의 성격 역시 자본절약형으로 선진국에 비해 장비수준 및 자본생산성이 떨어지고 있어, 기술수준의 낙후를 시사하고 있다. 앞으로 국제화, 개방화, 지방화의 시대가 도래할 것이고, 자유경쟁원리에 토대를 둔 경영효율, 기술혁신, 품질 등에 의해 경쟁력의 우위가 결정될 것이다. 향후, 건설기술정책은 건설기술개발의 체계화, 신기술 활용의 극대화, 건설산업의 종합화 및 전문화, 생산체계의 효율화 등을 지향해야 한다.

• The Journal of the Korea Contents Association
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• v.20 no.1
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• pp.25-30
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• 2020

Recently, as a way to revitalize the comprehensive logistics service industry, the government is trying to foster the concentration of the logistics industry. The introduction of institutional and legal measures for the maintenance of the logistics system will be expanded to the support limit for the professional logistics business, and the support for acquisitions and mergers will be strengthened. The expansion plan is also being promoted. In this paper, to analyze the efficiency of the integrated logistics service industry using DEA, we analyzed management efficiency using financial data for a total of 15 integrated logistics service industries. In the case of inefficient companies, the projected values for efficient company operation were presented, and the companies that could be benchmarked were identified through reference sets. In addition, I would like to consider the company's operation plan in consideration of scale profitability.

• Journal of Industrial Convergence
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• v.20 no.11
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• pp.135-140
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• 2022

A study to estimate the appropriate size for the quota of civil servants during the period of change of government is required. Therefore, in this study, we would like to introduce a study that uses DEA to estimate the appropriate size of public officials. The department of a public institution is DMU, and the number of employees in each department is applied as an input variable, and the number of electronic approval production documents and the number of electronic approval expenditures are applied as output variables. MaxDEA 8 was used as an analysis program for this purpose. As a result of the analysis, when the efficiency level was 1.00 (100%), 3 out of 14 departments showed the optimal level by satisfying the efficiency, and 10 of the remaining departments scored 0.50 (50%) with a score of 0.50 (50%), confirmed to be relatively inefficient. In other words, it was confirmed that most departments had inefficient surplus staff. As an additional analysis, we calculated the number of possible staff reductions using the efficiency level. Using this, it is expected that the field of manpower reduction can be discovered in advance through an analysis of manpower efficiency by department, and based on this, it can be used to relocate manpower by department according to future response strategies.