• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권3호
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• pp.1280-1300
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• 2020

In the modern financial sector, interest in providing financial services that employ blockchain technology has increased. Blockchain technology is efficient and can operate without a trusted party to store all transaction information; additionally, it provides transparency and prevents the tampering of transaction information. However, new security threats can occur because blockchain technology shares all the transaction information. Furthermore, studies have reported that the private keys of users who use the same signature value two or more times can be recovered. Because private keys of blockchain identify users, private key leaks can result in attackers stealing the ownership rights to users' property. Therefore, as more financial services use blockchain technology, actions to counteract the threat of private key recovery must be continually investigated. Private key recovery studies are presented here. Based on these studies, duplicated signatures generated by blockchain users are defined. Additionally, scenarios that generate and use duplicated signatures are applied in an actual bitcoin environment to demonstrate that actual bitcoin users' private keys can be recovered.

• 통상정보연구
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• 제11권3호
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• pp.363-390
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• 2009

This study investigates the role of private participation in FTA Negotiation in case of US, Mexico and Japan. We utilize Putnam(1988)'s two stage negotiation model, Schelling Conjecture and Principal-Agent(P-A) theory to understand the role of private sector in FTA Negotiation. Those theories are useful to understand the behavior and interaction of key players such as private sector, congress and government in FTA negotiation. Putnam(1988)'s two stage negotiation model divides the FTA negotiation process into two processes: the external negotiation with foreign country and domestic negotiation with domestic interest group. Principal-Agent(P-A) theory provides the theoretical foundation of Putnam's two stage negotiation model, which is that principal's interest is not identical to the interest of Agent. We showed that the private sector and congress play an important role in FTA negotiation in United States. In case of Mexico, the private sector and government occupy the dominant position in FTA negotiation. In particular, the cooperation of industry and government has been successfully established via COECE in Mexico. In contrast to these countries, the role of private participation in trade policy is relatively low in Japan and Korea.

• 품질경영학회지
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• 제32권4호
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• pp.92-102
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• 2004

In this era of intense competition, TQM has become the key program in organizations as they strive for a competitive advantage. It has been applied to manufacturing and service sector since BNQA model was established in 1987. TQM literature for manufacturing sector abounds with empirical studies on the critical dimensions of TQM, but there is few empirical studies on the TQM evaluation for service sector. In this paper, two methodologies are applied to evaluate the TQM activities of service companies comparatively One of them is the traditional scoring system(TSS) by analytic hierarchy process(AHP). The other is the efficiency measuring system(EMS) by data envelopment analysis(DEA). DEA outperformed other alternative methods to measure the efficiency and it can be applied to evaluate the TQM activities. The objective of this paper is to evaluate TQM activities of domestic service companies by applying TAE(Total quality management Activities Evaluation) model to them. The result of this study is that TSS scores are not significantly correlated with EMS scores. It means that service organizations must not only make efforts to get the higher scores in terms of TSS but also take necessary steps to enhance their efficiencies.

• Environmental Engineering Research
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• 제24권1호
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• pp.74-81
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• 2019

Upcycling generally refers to the conversion of waste materials to something useful or valuable and is a useful concept that can be applied not only to the waste design industry but also to waste recycling and resource circulation. Our study highlights upcycling as the key concept for improving the value of waste by redefining the concept as "the recycling of waste materials and discarded products in ways that enhance their value." Four upcycling strategies are linked to material flow analyses conducted on waste electronic and electrical equipment, specifically waste refrigerators and waste computers, to examine the technologies available for implementation and suggest guidelines for the promotion of upcycling. The amount of waste refrigerators collected by the formal sector was 121,642 tons/y and the informal sector, 63,823 tons/y. The current recycling ratio of waste refrigerators was estimated as 88.53%. A total of 7,585 tons/y of waste computers were collected by the formal sector and 3,807 tons/y by the informal sector after discharge. Meanwhile, the current recycling ratio of waste computers was estimated as 77.43%. We found that it is possible to introduce 28 upcycling technologies in the case of refrigerators, and 15 technologies are available to promote upcycling in the case of computers. By refining the broad concept of upcycling and looking at the stages of material flow, our approach presents universally applicable directions for incorporating upcycling in resource recovery and recirculation plans.

• 한국건설관리학회논문집
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• 제19권2호
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• pp.25-37
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• 2018

민간투자자 사이에서의 리스크 재분담은 민간투자자의 현금흐름에 추가적인 변동성을 야기하며, 민간부문의 투자결정에 있어 제약요인이 되고 있다. 하지만 기존의 재정건전성 평가모델은 지분거래와 약정거래가 충분히 반영되지 않아, 민간투자자 간 리스크 재분담에 따른 현금흐름의 변동성을 분석하기에 한계가 있다. 본 연구는 민간투자자 사이에서 이루어지는 지분거래와 약정거래를 분석하고, 이를 반영한 민간투자자의 재무적 평가 모델을 개발하였다. 또한, 개발된 모델의 실증적 분석을 통해 지분거래의 주요변수와 약정거래의 영향요인을 도출하였으며, 민간투자자 간 리스크 재분담과 민간투자자의 수익률 간의 관계를 증명하였다. 본 연구는 리스크 재분담에 대한 민간투자자의 의사결정에 기여할 것이며, 더 나아가 민간투자사업의 협약지연의 문제를 관리하는데 도움이 될 것이다.

• 국제지역연구
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• 제15권3호
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• pp.145-174
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• 2011

광업에 의존하고 있는 개발도상국들에 있어 광업 부문에 외국인직접투자(FDI)를 유치하는 것은 지속적인 경제성장을 위한 중요한 요소가 되고 있다. 본 논문은 광업부분에서 외국인직접투자를 유인하는 결정요소들을 밝히는 것을 목표로 하고 있다. 기존의 개념적인 연구들에 기초하여 1996년부터 2009년까지의 40개 광업 국가들의 패널통계를 이용해 실증 분석하고 있다. 본 논문은 기존 논문들과 달리 광범위하고 포괄적인 변수들을 사용하고 있어 광업부문 외국인직접투자의 요소결정을 분석하는 최초의 의미 있는 실증분석이라 하겠다. 실증분석 결과 시장규모, 무역개방성, 광물의 품질, 기반시설의 수준, 규제의 정도와 국가의 경제적 위험도는 광업 분야 외국인직접투자의 유입과 정(正)의 관계를 보이고 있다. 이와 반대로 관세율, 법인세율, 부패수준과 정치적 불안정도는 광업 분야에 유입되는 외국인직접투자와 부(負)의 상관관계를 보이고 있다. 또한 일반적으로 개발도상국들이 선진국들보다는 광업 분야에 대한 외국인직접투자를 더욱 많이 끌어들이고 있는 것으로 나타났다.

• 산업경영시스템학회지
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• 제46권3호
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• pp.41-58
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• 2023

This study identifies the commercialization success factors that can be an important indicator for the transfer and commercialization of national R&D results in the agricultural sector. Unlike other industries, the agricultural sector has a non-systematically scaled and processed industrial structure, and R&D is led by government rather than the private sector. Although the quantitative performance of national agricultural R&D, especially the number of patents and publications, has increased rapidly with the quantitative expansion of the government R&D budget, the technology commercialization of the results of agricultural R&D has been accompanied by difficulties for SMEs. Therefore, this study summarized the success factors for commercialization of state-owned technologies presented in previous studies, and based on them, analysed the success factors for commercialization specific to the agricultural sector. It also conducted a questionnaire survey using Delphi and focus group interviews (FGI) with experts from academia, research and industry, and a survey of agricultural companies to derive success factors for commercialization in the agricultural sector using logistic regression analysis. As a result, five indicators with positive correlation and three indicators with negative correlation within technology characteristics, suppliers, adopters, policy and market factors were finally derived as key factors for agricultural commercialization. In the future, it is expected that independent factor analysis of the food and seed sectors, which have independent industry characteristics from the agricultural sector, will be needed.

• 한국재난정보학회 논문집
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• 제18권2호
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• pp.405-417
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• 2022

연구목적: 지자체는 국민의 안전과 생활에 직접적으로 영향을 주는 행정조직으로서 재난 발생 시 핵심 기능의 연속성 확보가 중요하다. 본 논문은 재난으로부터 지자체 핵심기능을 보호·유지하기 위한 기능연속성계획의 수립 및 실행력 확보를 위한 효율적인 방법을 검토하는 것을 목적으로 한다. 연구방법: ISO22301기반 한 기능연속성계획의 비효율성을 개선하기 위하여, 조직중심의 기능연속성 방법을 적용하여 계획수립 방안과 핵심기능, 소요자원 그리고 교육훈련에 관련된 기본 서식을 제시하고, 지자체에 적용하여 타당성을 검토한다. 연구결과: 제안된 조직중심의 기능연속성계획 작성 방법은 관료적인 지자체의 특성을 반영하여 실국 단위로 작성함으로써 작성 및 실무적용이 용이하다. 결론:민간에 비하여 업무가 조직중심으로 되어 있는 공공분야에서는 기능연속성계획 수립에 조직적인 관점을 충분히 반영하는 것이 더 효율적인 방법이 될 수 있다.

• 한국기후변화학회지
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• 제6권4호
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• pp.367-377
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• 2015

This study analyzed the effectiveness of China's policy to reduce of sulfur dioxide. China's $12^{th}$ Five-year plan on national economic and social development emphasized environmental protection and low-carbon economic development. Sulfur dioxide was one of the major gases to affect air pollution and climate change and its control became a key policy agenda in the environment and energy sector. As the absolute amount of sulfur dioxide emissions in China came from the industrial sector, the control of the coal-based energy was especially urgent. This study analyzed the factors that influenced the sulfur dioxide emissions and the policy effects to reduce sulfur dioxide in China from 2003 to 2012 based on regional data. The air pollution treatment investments showed the biggest impact together with energy conservation policy in reducing sulfur dioxide emissions. However, pollutant emissions charge did not show a relevant policy effectiveness in all regions as the amount of charge would be smaller than economic benefit from non-compliance. Rationalizing pollutant emissions charge is, therefore, a key policy task for further reduction of sulfur dioxide emissions.

• 경영정보학연구
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• 제13권3호
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• pp.83-97
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• 2011

민간기업의 양질의 고객 서비스에 익숙해 진 국민들은 공공서비스에 대해서도 같은 수준의 서비스를 기대하고 있다. 이에 따라 공공기관들은 서비스의 질을 향상시키기 위해 다각적 측면의 노력을 하고 있다. 우선 국민들의 요구를 파악하기 위한 고객 만족도 조사를 시행 후, 그 결과분석을 통해 서비스 개선 전략을 수립하고, 서비스 품질 향상을 도모하고 있으며, 직원들의 복리 개선을 위해서 직원만족도 조사를 시행하는 동의 근무환경을 개선하고자 하는 노력도 기울이고 있다. 하지만 이들의 연계한 분석은 이루어지지 않고 있으며, 고객만족도와 직원들의 KPI를 달성하기 위한 노력여부와의 연관성을 살펴 본 연구는 거의 없다. 선순환적인 공공서비스 개선을 위해서는 공공기관은 직원들에게 일방적인 고객서비스 개선만을 요구 할 것이 아니라 조직이 직원들에게 제공하는 직원서비스 개선을 동시에 도모해야 할 것이다. 이에 본 연구에서는 고객만족도(CSI)조사, 직원만족도(ESI)조사를 통해 핵심성과지표(KPI)를 도출하는 방안을 제시했으며, 핵심성과지표의 목표달성도(KPI achievement)와 각 조사결과의 연계분석을 통해 공공기관의 서비스 경영혁신을 도모할 수 있는 서비스 개선 전략을 제시하고자 한다.