• Nuclear Engineering and Technology
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• 제42권2호
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• pp.145-150
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• 2010

The paper is describing work being developed in the frame of a 5-year IAEA Coordinated Research Programme (CRP) started in late 2005. Participants gained knowledge of modelling methodologies and experience in the development and use of rather sophisticated simulation tools in support of site characterization and performance assessment calculations. These goals were achieved by a coordinated effort, in which the advantages and limitations of numerical models are examined and demonstrated through a comparative analysis of simplified, illustrative test cases. This knowledge and experience should help them address these issues in their own country's nuclear waste program. Coordination efforts during the first three years of the project aimed at enabling this transfer of expertise and maximizing the learning experience of the participants as a group. This was accomplished by identifying common interests of the participants (i.e., Process Modelling and Total System Performance Assessment methodology), and by defining complementary tasks that are solved by the members. Synthesis of all available results by comparative assessments is planned in the coming months. The project will be completed end of 2010. This paper is summarizing activities up to November 2009.

• 한국환경과학회지
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• 제6권4호
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• pp.293-302
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• 1997

Environmental problems emerged as common global Problems awaiting solution. Active collaborative efforts are required of nations and communities In order to solve environmental problems effectively. International collaboration occurs much more commonly these days than before. and European Community(EC) mumber countries are no exceptions. EC has established and executed the five-year programs on Environmental Policy Implementation, which explicated basic principles for enoronmental policy development, stance 1973. EC programs tend to emphasize that the direction of the policies should reflect a change from a remedial approach to a preventive approach. Those pro- grams have brought an awareness of the Importance of Environmental Impact Assessment(EIAI to EC member countries. France Installed an EIA system In 1976, which was the first among member countries. Several other member countries also established a system. EC decided that a common guideline was necessary. and therefore formulated the "European Community Guideline for Environmental Impact Assessment" In 1985. All member countries were required to legislate an EIA system within three years, according to the Guideline. This study will conduct a comparative analysis of the current EIA systems of different EC member counties. The findings of this study will provide helpful Information on how to Improve the efficacy of the Korean system.an system.

• 통상정보연구
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• 제10권4호
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• pp.277-298
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• 2008

This study develops the market attractiveness assessment model and draws the strategic target markets and their corresponding exporting strategies through identifying the market positions in the dimensions of market attractiveness scores and market positional strength to achieve the innovative export promotion of Korean heavy electric industry and the resulting improvement and reversal of comparative-disadvantage position. In chapter 2, we analyze the stages of selecting target markets, the constructs and their measure variables of market attractiveness models, and the components and strategic policy implications of directional policy matrix. And in chapter 3, we identify the comparative advantage positions of Korean heavy electric industry in the global market through analyzing its trade structure, trends, balance, ratio-balance, and specialization index by the item and the region respectively. We find that the Asia/Pacific region is the most attractive export market of the Korean heavy electric equipment industry, the following important strategic target markets are the America, MENA, CIS/East Europe Regions in the order of their attractiveness and competitive position dimensions. In the mean time, the sub-Sahara Africa and West Europe region is shown to be the long-run-viewpoint target market requiring the innovation or divest strategies owing to their low attractiveness and the low market share of Korean exports.

• Journal of international Conference on Electrical Machines and Systems
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• 제1권1호
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• pp.8-16
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• 2012

Fixed speed wind turbine generators system that uses induction generator as a wind generator has the stability problem similar to a synchronous generator. On the other hand, doubly fed induction generator (DFIG) has the flexibility to control its real and reactive powers independently while being operated in variable speed mode. This paper focuses on a scheme where IG is stabilized by using DFIG during grid fault. In that case, DFIG will be heavily stressed and a remedy should be found out to protect the frequency converter as well as to allow the independent control of real and reactive powers without loosing the synchronism. For that purpose, a crowbar protection switch or DC-link protecting device can be considered. This paper presents a comparative study between two protective schemes, a crowbar circuit connected across the rotor of the DFIG and a protective device connected in the DC-link circuit of the frequency converter. Simulation analysis by using PSCAD/EMTDC shows that both schemes could effectively protect the DFIG, but the latter scheme is superior to the former, because of less circuitry involved.

• 한국안광학회지
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• 제14권1호
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• pp.17-21
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• 2009

목적: 국산 주문용 시력보정 렌즈의 국제규격에 따른 품질을 평가하고, 분석하였다. 방법: 국내시장에서 유통되고 있는 국내 브랜드의 주문용 렌즈들을 대상으로 굴절력, 중심두께, 투과율을 측정하고, 국제규격에 따라 외국브랜드 제품과 비교, 분석하였다. 결과: 국산 제품들 중 국제규격의 허용기준에 맞지 않는 경우가 1제품 있었지만 굴절력, 투과율에서 대부분 우수한 특성을 보였다. 결론: 국내외 시장에서 외국제품들보다 더 높은 선호도를 가지기 위해 렌즈제조업체의 더 강화된 품질관리와 마케팅 전략이 필요하다.

• International Journal of Computer Science & Network Security
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• 제21권8호
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• pp.35-42
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• 2021

In the current context of digitalization of education, the use of modern methods and techniques of data analysis and processing in order to improve students' school results has a very important role. In our paper, we aimed to perform a comparative study of the classification performances of AdaBoost, SVM, Naive Bayes, Neural Network and kNN algorithms to classify the results obtained at the Baccalaureate by students from a college in Suceava, during 2012-2019. To evaluate the results we used the metrics: AUC, CA, F₁, Precision and Recall. The AdaBoost algorithm achieves incredible performance for classifying the results into two categories: promoted / rejected. Next in terms of performance is Naive Bayes with a score of 0.999 for the AUC metric. The Neural Network and kNN algorithms obtain scores of 0.998 and 0.996 for AUC, respectively. SVM shows poorer performance with the score 0.987 for AUC. With the help of the HeatMap and DataTable visualization tools we identified possible correlations between classification results and some characteristics of data.

• Journal of Korea Trade
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• 제25권6호
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• pp.126-142
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• 2021

Purpose - This study discusses the effects of human capital in the formation of GVC linkages. We also investigate GVC intensity between Korea and ASEAN. Design/methodology - To solve the doubling-counting problem in evaluating comparative advantage, RCA has been re-computed using domestic value-added (henceforth RCA_VA) at the country-sector level instead of value of trade. The impact of human capital on GVC intensity was empirically analyzed by establishing a panel data set with four industries (ISIC Rev. 4) in eight ASEAN countries from 2005 to 2015 from OECD-TiVA and WDI. Findings - The empirical results show that human capital has a negative effect on GVC intensity in the agriculture and manufacture industries, while it has a positive effect in the service and information industries. The results do not mean that low human capital is a barrier and inefficient to GVC linkages. Low Value-added activities may be more profitable to some emerging countries. These findings suggest that it is important to accurately identify the competitive elements to increase gains from trade under the GVC. Also, it shows that comparative advantages can be misled by an RCA index evaluated in trade volume under the GVC. Originality/value - This study highlights the importance of human capital as a factor for the efficient formation of Global Value Chain (GVC). This study has different from the literature in analyzing the role of human capital in formation of linkage of the GVC. And we clarify the changing patterns of trade by removing the double-counting problem under the GVC.

• Safety and Health at Work
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• 제12권2호
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• pp.230-237
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• 2021

Background: Noise-induced hearing loss is a well-known occupational disease that affects many fish harvesters from many fisheries worldwide, whose risk factor is prolonged exposure to hazardous noise levels. To date, academic research activities and regulatory bodies have not provided any comparative analysis among the existing methods to assess noise exposure levels of fish harvesters. This paper provides a comparison of four relevant assessment methods of noise exposure, examining the results of a measurement campaign performed onboard small fishing vessels from Newfoundland and Labrador. Methods: We traveled onboard 11 vessels engaged in multiple fisheries from Newfoundland and Labrador and performed extensive noise exposure surveys using the simplified International Maritime Organization method, the full-day measurement method, and the two methods provided by ISO 9612:2009, the task-based method and job-based method (JBM). Results: The results showed that the four methods yield similar values when the noise components are dominated by the engine and auxiliaries (steady-state sources); when noise components are dominated by the fishing gear, task-based method and the simplified International Maritime Organization method estimates are less accurate than JBM, using full-day measurements as baseline. Conclusion: The JBM better assesses noise exposure in small-scale fisheries, where noise exposure has significant variance and uncertainties on the exposure levels are higher.

• 무역학회지
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• 제44권3호
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• pp.171-189
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• 2019

As many studies have contributed to various aspects of the market by utilizing market orientation, however, this study has tried to overcome limitations of existing studies and suggest more concrete and extended implications. In this study, the relationship between market orientation, responsiveness to market change, and organizational performance of SMEs was examined and compared with characteristics of SMEs (manufacturing and service firms). As a result of the verification, interfunctional coordination has a strong influence on the ability of the organization to respond to market changes as well as customer orientation and competitor orientation. And responsiveness to market change, organizational flexibility has a strong impact on both personal performance and overall team performance. As a result of the comparative study, it can be concluded that manufacturing firms emphasize competitor orientation and organizational agility while service firms emphasize customer orientation and organizational flexibility.

• 스마트미디어저널
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• 제12권2호
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• pp.83-90
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• 2023

양자 컴퓨터의 등장은 기존 해시함수 보안에 위협이 되고 있다. 본 논문에서 우리는 국내/국제 해시함수인 LSH, SHA2, SHA3, SM3에 대한 양자회로 구현 결과를 확인하고 비교 분석을 진행하였다. 양자 컴퓨터에서 기존 해시함수를 동작하기 위해서는 양자 회로로 구현되어야 하며 필요한 양자 자원 추정을 통해 양자 보안 강도를 확인할 수 있다. 우리는 각 논문에서 제안한 양자회로 구현 방법 및 양자 자원 추정 결과를 여러 방면에서 비교하고 이를 통해 향후 양자 컴퓨터 보안을 충족하기 위한 방안을 논의하였다.