• 산업공학
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• 제24권1호
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• pp.24-39
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• 2011

In this paper, we study the methodology for the measurement and integration of market risk and credit risk using Copula. We apply the methodology of Rosenberg, and Schuermann(2006) to the assets of pension system. Firstly we estimate dynamics of risk factors and their effects on investment returns, then use the estimated result to simulate future movement of risk factors and distribution of investment returns. Finally we measure integrated risk using integrated return distribution by Copula and simulated future investment return distributions. We found the integrated risk changing with the correlation of risks and investment weights of risks and confirmed the diversification effect of risks. This result is consistent when we use normal Copula and normal marginals, t-Copula and t(3) marginals, and normal Copula and non-parametric marginals. And in the case of non-parametric maginals, larger integrated risk is calculated. It means that use of non-parametric marginals is more conservative.

• 한국과학교육학회지
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• 제33권4호
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• pp.763-777
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• 2013

본 연구는 통합을 실천하고 있는 두 학교의 사례를 통해 학교 차원의 통합 과학교육의 가능성을 알아보고자 하였다. 이를 위하여 통합을 실천하고 있는 학교에서 일어나는 통합은 어떤 형태인지 그리고 일반 학교와 구별되는 그 학교의 상황 요소는 무엇인지를 수업 참관, 교사 면담, 학교교육계획서 수집, 수업 동영상 분석, 학생 결과물 수집과 같은 다중적인 방법을 사용하여 살펴보았다. 본 연구의 결과는 다음과 같다. 첫째, 두 학교는 통합의 유형, 수준, 교사의 역할, 학생 활동에서 차이를 드러냈으며 이러한 차이가 다른 모습의 통합 과학교육 사례를 보여주었다. 둘째, 두 학교가 통합을 실천할 수 있게 한 학교 상황 요소가 있었다. 통합교육을 실천한 학교를 대상으로 한 선행 연구 결과와 비교했을 때 '리더십', '교사 팀의 협력활동', '교육계획을 위한 시간확보', '유동적인 시간운영', '지역사회와 연계'와 같은 유사한 학교 상황요소가 발견되었다. 그러나 두 학교의 사례에서는 통합을 기존의 안정적 성격의 교육적 시도가 아닌 보수적인 교사 문화를 극복하여 학교 교육의 혁신을 추구하는 것으로 보았다. 따라서 이 연구에서는 '보수적 문화극복/혁신 추구'를 새로운 학교 상황 요소로 제안하였다. 또한 두 학교는 안정적인 교사 관계를 형성하였으나 선행 연구에 비해 단기간에 대규모로 실시되었기 때문에 선행 연구에서 제안한 '소규모의 안정적인 학습 환경' 대신 '협력적 친밀한 관계'로 요소를 수정하였다.

• 대한인간공학회지
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• 제23권2호
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• pp.13-24
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• 2004

Human error has brought about accidents more than 50% in system of a large size and complicated expecially in nuclear power plants(NPPs). The technology of Man Machine Interface(MMI) has been changed to the digitalized controls employing computer-based technology. According to this trend. the human factors guidelines are becoming main issue for reliable supports to digitalized information displays. However. the existing human factors guidelines is not enough for advanced information display on NPPs. The purpose of this research is to develop the reliable design and evaluation guidelines for advanced information display in main control room (MCR) of NPPs. In this study. the various general human factors guidelines concerning information display on CRT are integrated on data base management system. unified based on the integration rules. and applied in computer based procedures. The use of the integrated guidelines are expected to evaluate the existing information display on MCR in NPPs from the human factors point of view.

• Asia pacific journal of information systems
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• 제13권1호
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• pp.119-140
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• 2003

The business value of IT has been the focus of the academic and business field in recent years, along with the massive IT investment. Unfortunately, those studies have not been able to demonstrate strong linkages between the IT investment and performance. The impact of IT investment on performance is an important research topic that needs to consider the role of key contextual factors and intermediate factors. This study develops an integrated model for IT investment, with the mediating effects of production/coordination performance towards firm performance. In addition, the model is moderated by some factors like ISP(Information Systems Planning), Business Planning alignment, top management support, IT education and training, and process innovation. The empirical result, based on the moderating regression analysis, indicates that the relationship between IT Investment and production/coordination performance is significantly positive depending on moderating factors. However, production/coordination performance is partially related to firm performance.

• 대한안전경영과학회지
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• 제12권3호
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• pp.1-11
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• 2010

Establishing a framework, to explain the path to safety accidents considering major safety management factors such as physical conditions including on-site activities and workplace, as well as human factors as to labor, supervisors, or managers, would be effective as the basis to control project's risks by preventing disasters. Therefore, this study aimed to clarify the mechanism in safety management and disaster occurrence. In order to accomplish the purpose, it identified and classified the factors related to accidents, reviewed the causal relationships among them, and suggested the influence diagram. The results of this research are expected to contribute to reinforcing the preventive management, and facilitating the development of integrated site control system based on safety risks.

• 한국IT서비스학회지
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• 제11권1호
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• pp.247-272
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• 2012

Social Network Service(SNS) is a kind of advanced Internet service that acts as personal media. This study was intended to find out the structural relationships among factors affecting the usage of social network services by extending the Technology Acceptance Model(TAM). For this purpose, the variable 'Flow' was first integrated into the TAM in order to understand the internal motivations of users. And then the external factors of SNS usage were derived from the perspective of users, contents, and media side of SNS, and finally the dependent variable was set with the intention of sustainable use. Then these factors were carefully integrated into a structural model. We expect the findings of this study will be very helpful for the internet marketing professionals, SNS developers, and the others.

• 한국환경과학회지
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• 제24권3호
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• pp.303-316
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• 2015

The relationship between urban spatial structures and GHG-AP integrated emissions was investigated by statistically analyzing those from 25 administrative districts of Seoul. Urban spatial structures, of which data were obtained from Seoul statistics yearbook, were classified into five categories of city development, residence, environment, traffic and economy. They were further classified into 10 components of local area, population, number of households, residential area, forest area, park area, registered vehicles, road area, number of businesses and total local taxes. GHG-AP integrated emissions were estimated based on IPCC(intergovernmental panel on climate change) 2006 guidelines, guideline for government greenhouse inventories, EPA AP-42(compilation of air pollutant emission factors) and preliminary studies. The result of statistical analysis indicated that GHG-AP integrated emissions were significantly correlated with urban spatial structures. The correlation analysis results showed that registered vehicles for GHG (r=0.803, p<0.01), forest area for AP (r=0.996, p<0.01), and park area for AP (r=0.889, p<0.01) were highly significant. From the factor analysis, three groups such as city and traffic categories, economy category and environment category were identified to be the governing factors controlling GHG-AP emissions. The multiple regression analysis also represented that the most influencing factors on GHG-AP emissions were categories of traffic and environment. 25 administrative districts of Seoul were clustered into six groups, of which each has similar characteristics of urban spatial structures and GHG-AP integrated emissions.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 2004년도 추계학술발표회 발표논문집
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• pp.585-586
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• 2004

• 한국콘텐츠학회논문지
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• 제11권9호
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• pp.536-545
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• 2011

본 연구에서는 테크놀로지 활용 이후 교사들의 교육활동을 어떻게 변화시키고 있는지 알아보고자 하였다. 선행연구를 바탕으로 구성된 설문지를 제작 배부하여 311명의 초중등 현직교사로부터 회수하여 탐색적 요인분석을 통해 5개의 요인을 추출하였다. 또한 이러한 요인들이 교사들의 심리 태도적 배경변인인 테크놀로지에 대한 태도와 테크놀로지 유능감에 따라 다르게 나타나는지에 대해서도 분석하였다. 연구의 결과는 학교현장에서 테크놀로지의 활용으로 인해 교사들의 교육활동에 상당한 변화가 일어나고 있음을 나타내주고 있다. 한편 교사들의 테크놀로지 활용교육의 필요성을 인식하는 테크놀로지에 대한 태도보다는 교사 스스로 테크놀로지를 잘 활용할 수 있다는 테크놀로지 유능감에 따라 교육활동의 변화에 대한 차이가 나타났다.

• 한국컴퓨터정보학회논문지
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• 제18권12호
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• pp.45-53
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• 2013

정부통합전산센터는 정부부처별로 운영 중인 정보시스템을 통합하여 공동 활용체계를 구축하기 위해 2005년에 설립되었다. 정부통합전산센터의 구축과 운영 과정에서 다양한 IT 거버넌스 이슈들이 잠재되어 있다. 조직이 효과적인 IT 거버넌스를 구현하기 위해서는 이슈별 핵심성공요인들(CSFs)을 확인하는 것이 중요하다. 그러나 공공부문에서 IT 거버넌스의 핵심성공요인을 다룬 연구들은 많지 않다. 본 연구에서는 문헌고찰과 전문가 패널의 의견수렴을 통해 정부통합전산센터의 IT 거버넌스 핵심성공요인들을 도출한 후 실무적인 시사점을 제공하였다. 본 연구의 결과는 정부통합전산센터의 효과적인 IT 거버넌스 구현에 기여할 수 있을 것으로 사료된다.