• Journal of Radiation Protection and Research
• /
• 제16권1호
• /
• pp.53-72
• /
• 1991

An integrated model is developed in this paper for the performance assessment of high level radioactive waste repository. This integrated model consists of two simple mathematical models. One is a multiple-barrier failure model of the repository system based on constant failure rates which provides source terms to biosphere. The other is a biosphere model which has multiple pathways for radionuclides to reach to human. For the parametric uncertainty and sensitivity analysis for the risk assessment of high level radioactive waste repository, Latin hypercube sampling and rank correlation techniques are applied to this model. The former is cost-effective for large computer programs because it gives smaller error in estimating output distribution even with smaller number of runs compared to crude Monte Carlo technique. The latter is good for generating dependence structure among samples of input parameters. It is also used to find out the most sensitive, or important, parameter groups among given input parameters. The methodology of the mathematical modelling with statistical analysis will provide useful insights to the decision-making of radioactive waste repository selection and future researches related to uncertain and sensitive input parameters.

• Journal of Information Technology Applications and Management
• /
• 제23권2호
• /
• pp.177-194
• /
• 2016

This study analyzed President Park's speeches and the government's industry policy in the field of information security using cognitive map. The relationship analysis between policy tool variables and policy goal variables was employed to derive revitalization strategy of information security. This paper found that entrepreneurship revitalization has very strong causality with expansion of domestic market and global market. But, on the other hand, HR development has very weak causality with job creation and future growth driver because the labor market in the information security industry is poor and its transfer rate to other industry is very high. This study showed that this cognitive map could be characterized by a scarcity of feedback loops and a strong emphasis on the positive loops in the structure of virtuous circle. In this paper, we also constructed a comprehensive cognitive map on the policy vision of information security, showing that there are a risk of cyber threat, an opportunity of new fusion security market, information security reinforcing circle, global economic circle, and domestic market circle.

• KDI Journal of Economic Policy
• /
• 제29권2호
• /
• pp.75-116
• /
• 2007

본 연구는 외환위기를 전후로 우리나라 기업의 현금보유 패턴에 어떠한 변화가 발생하고 있는지 분석하였다. 분석결과에 따르면, 첫째 최근 현금보유가 증가한 것은 소수의 기업들이 현금보유 규모를 과거에 비해 급격하게 증가시키는 과정에서 관찰된 현상이며, 전반적으로 기업들의 현금보유가 증가하였다고 보기는 어려운 것으로 나타났다. 둘째, 선진국의 경험과 유사하게 우리나라 기업들의 경우에도 영업성과의 불확실성이 높을수록 현금보유 비중을 높게 가져가는 경향이 있는 것으로 나타났다. 최근 영업성과의 불확실성이 과거에 비해 상승한 것도 우리나라 기업의 현금보유 패턴 변화에 일부 영향을 미쳤을 것으로 사료된다.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2018년도 추계학술대회
• /
• pp.309-310
• /
• 2018

최근 실험실을 관리하기 위한 시스템들은 IoT 기반의 다양한 센서들을 활용하여 실시간으로 관리할 수 있는 서비스를 제공한다. 시스템은 센서 데이터를 수집한 뒤 서버로 전송하고 위험상황을 식별하여 기기들에게 동작 명령을 전송한다. 이러한 시스템들은 중앙 집중형 구조로써 여러 곳의 실험실을 관리할 경우 데이터 처리 속도가 늦어지게 된다. 이를 해결하기 위해 본 논문에서는 분산 처리 환경에서 실험실을 관리하여 위험상황의 식별 및 관리를 수행할 수 있는 시스템을 제안한다. 센서 모듈을 이용하여 실험실을 제어하고 위험상황에 대한 식별 및 대처를 자동으로 진행할 수 있게 한다.

• Structural Engineering and Mechanics
• /
• 제45권6호
• /
• pp.803-819
• /
• 2013

This paper addresses two main issues relevant to the structural assessment of buildings subjected to explosions. The first issue regards the robustness evaluation of steel frame structures: a procedure is provided for computing "robustness curves" and it is applied to a 20-storey steel frame building, describing the residual strength of the (blast) damaged structure under different local damage levels. The second issue regards the precise evaluation of blast pressures acting on structural elements using Computational Fluid Dynamic (CFD) techniques. This last aspect is treated with particular reference to gas explosions, focusing on some critical parameters (room congestion, failure of non-structural walls and ignition point location) which influence the development of the explosion. From the analyses, it can be deduced that, at least for the examined cases, the obtained robustness curves provide a suitable tool that can be used for risk management and assessment purposes. Moreover, the variation of relevant CFD analysis outcomes (e.g., pressure) due to the variation of the analysis parameters is found to be significant.

• 한국농촌간호학회지
• /
• 제3권1호
• /
• pp.5-14
• /
• 2008

Purpose: The purpose of this study was to analyze the trend of research on clonorchis sinensis in Korea. Method: The study design was a literature analysis in which research studies with 'Clonorchis' in the title were collected from 2001 to 2007. A total of 115 research studies were analyzed based on the year of publication, study design, major or institute of researcher, study sample, and research theme. Results: 10-19% of the research studies were published each year from 2001 to 2007. Experimental study design was the most frequent at 54.8%. Medicine or parasitology as the major of researchers were 43.2% and 41.2% retrospectively, but no nursing studies were found. For study samples, 65.9% were cyst larvae and animals, followed by human beings (29.5%). In research theme, the structure and gene analysis of clonorchis sinensis was the most frequent (32.1%), followed by animal experimental studies (15.7%), epidemic studies of clonorchis sinensis prevalence and changes (13.0%), and methods of diagnosis of clonorchis sinensis and effectiveness (12.2%). Conclusion: Although positive rate of clonorchis sinensis is still high, intervention studies for managing clonorchis sinensis were not found. So, methodological research developing clonorchis sinensis management program and intervention study is needed for high risk groups in rural communities.

• The Journal of Asian Finance, Economics and Business
• /
• 제8권2호
• /
• pp.981-992
• /
• 2021

This study identifies the determinants of potential failure of Islamic Peer-to-Peer (P2P) lending in Indonesia, and the mediating effect of Islamic ethics on reducing the potential for failure of Islamic P2P lending. This study uses primary data retrieved through questionnaires from the perspective of 152 stakeholders in Islamic P2P lending. Using a structural equation model (SEM), the study found that indebtedness, financing size, and governance have positive and significant relationships with the potential failure of Islamic P2P lending. This study provides evidence that the customer's internal conditions and the governance structure applied can increase the potential failure of Islamic P2P lending. Further, Islamic ethics is evidently able to partially reduce the potential failure of Islamic P2P lending by lessening risk management exposure, but it fails to address failure through Ponzi scheme exposure. As an implication, this study suggest that Islamic P2P lending must implement Islamic ethics more comprehensively by optimizing the advisory and supervisory role of the shariah board within their overall boards of directors also in their operational activities. Finally, it also adds to the existing knowledge on financial technology literature, particularly on the determinants of potential failure of financial technology from the perspective of stakeholders.

• Journal of Information Technology Applications and Management
• /
• 제29권3호
• /
• pp.25-41
• /
• 2022

While there exists voluminous literature on the internationalization of the firms, it has focused on mature firms or born-global firms. There is still a lack of research on firm that is in the growth stage between venture and mature firm. To fill this gap, this paper focuses on the newly public firm which is enter the stock market through initial public offerings (IPO). Specifically, I examine the relationship between the early listing and internationalization. In the venture firm aspect, the decision of the IPO necessary to allow to change organization structure, ownership and take a risk from environmental movements. This paper suggests early listing is a behavior of entrepreneur orientation. According to empirical results, there is a positive relationship between early listing and internationalization. It implies that early listing may help international expansion by sourcing finance, reputations from market. Furthermore, this study emphasizes the importance of financial slack resources to international expansion. I conclude that ventures need not only early entering in stock market but also securing sufficient financial slack resources to achieve sustainable growth in the international market.

• 한국건설관리학회:학술대회논문집
• /
• 한국건설관리학회 2008년도 정기학술발표대회 논문집
• /
• pp.587-590
• /
• 2008

수주산업이라는 건설업의 특성상 일반 건설업체는 기본적으로 수주 물량을 스스로 계획할 수 없으며, 연간 수주물량의 변동폭이 커 장비나 인력을 상시 고용하는데 한계를 가진다. 따라서 전문 건설업체와의 수직적 분업 관계를 통해 위험을 분산시키고 생산의 효율성을 높이고자 하는 의도 하에, 일반적으로 하도급에 의한 생산구조를 형성하고 있다. 이러한 생산구조에 따라 외주관리가 프로젝트의 성공적인 완수에 미치는 영향이 큼에도 불구하고, 그간 대다수 건설업체들은 효율적인 조직협력 관계를 이루지 못하고 있다. 이에 본 연구에서는 일반 전문건설업체간 조직협력의 현 실태를 파악하고 보완사항을 발굴하여 개선방안을 모색하고자 한다. 본 논문은 예비적 차원의 선행연구로서 협력업체의 현황조사를 바탕으로 그 원인을 고찰해 보고자 한다. 분석 결과 건설 산업의 협력에 대한 현 실태는 외형적인 협력조직 구성에 머물고 있으며 생산협력에 대한 효율적인 조직 활용을 못하는 것으로 나타났다. 전문건설업체는 수주 물량 확보를 위한 발판으로 협력업체로 등록을 하고 있었으며 생산향상을 위한 실질적인 협력행위가 거의 없는 수준이었다. 이에 건설업체간 조직협력의 각 단계에서 건설 생산성향상과 경제적 가치의 창출을 위한 생산협력의 해결방안이 요구된다.

• 한국건설관리학회논문집
• /
• 제23권6호
• /
• pp.43-53
• /
• 2022

우리나라의 건설산업은 전체 사업을 총괄하는 종합건설사업자가 발주자로부터 도급받아 세부공종을 담당하는 전문건설사업자에게 시공을 맡기는 계층적 구조로 이루어져 있는 경우가 많다. 이러한 구조에서 전체 공사에 대해 종합건설업자가 관리하고 책임을 지지만, 직접적으로 공사에 관여하는 자는 개별 전문공사업자이므로, 이들의 시공 능력과 관리 능력에 따라 시설물 등의 품질과 안전성이 달라지게 된다. 공사를 발주받는 자와 실제 시공하는 자가 달라서 발생할 수 있는 품질과 안전 문제를 해결하기 위해서는 일정 금액 이하의 공사에 한해서는 발주받는 자가 직접시공하도록 하는 것이 필요하며, 이를 위해 도입된 제도가 건설시공직접의무 제도이다. 이와 같이 해당 제도는 부실공사와 위험전가를 방지하기 위해 도입되었지만, 국내 건설산업의 특성과 제도적 한계, 현실적 문제점으로 인해 다양한 문제점을 안고 있는 제도이므로 이를 법적, 제도적으로 개선할 필요가 있다.