• Journal of Korea Society of Industrial Information Systems
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• v.27 no.5
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• pp.83-98
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• 2022

As the complexity of social problems and interdependency increased significantly, research on social entrepreneurship(SEship) increased rapidly. In this study, systematic approaches(bibliometrics analysis, citation network analysis, and keyword network analysis) were performed to identify research trends in business administration. To this end, keywords of 883 SEship papers published in prominent journals in the SCOPUS database were collected to investigate the existing research flow. The results of this study can be helpful for grasping the perspective of scholars in the business administration on SEship research and determining research topics through understanding related concepts.

• Journal of Chest Surgery
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• v.29 no.4
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• pp.373-380
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• 1996

Prevention of thromboembolism is the most important task in the development of bioconpatible small caliber artificial vascular graft. In normal vessels, vascular endothelial cells maintain homeosatsis by secreting numerous factors. The aim of this study is to develope a method which Improves biocompatibility of small caliver polyurethane graft using endothelial cell culture technique, and ev luate the efTectiveness of extracelluar matrix for endothelization which was produced by cultured fibroblast. Methods ; Multiporous polyurethane tube of 3 mm diameter, 0.3 mm thickness was manufactured for vascular graft. Three mongrel dogs were intubated and internal jugular veins removed. Extracelluar matrix produced by cultured flbrobast which was obtained from dog's internal jugular vein were coated to the polyurethane graft. Then, endothelial cells extracted from Jugular vein were cultured and fixed on the extracelluar matrix layer of vascular graft. Endothelial cell coated vascular grafts were implanted to the carotid arteries of experimental dogs as interposed autograft. Implanted grafts were removed after 3 and 6 weeks. As a control, PTFE graft was interposed on carotid artery. These experiments demonstrated that extracelluar matrix produced by fibroblast can afford a base for endothelial cell linings of polyurethane graft. Although thrombosis were developed on autografted en othelial cell coated graft, 33% opening was noticed, and showed less adhesion to adjacent tissue layer. These findings suggest that fiboblast produced extracelluar matrix which can be used for edothelial cell lining vascular graft, and by improving the cultured endothelial cell function, there will be a new modality for reducing thrombosis on small vascular graft.

• The Korean Journal of Applied Statistics
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• v.29 no.7
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• pp.1411-1419
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• 2016

Nonparametric procedures in randomized block design was proposed by Friedman (1937) as a general alternative. This method is used to find out the difference in treatment effect. It can cause a loss of inter block information using the ranking in each block. This paper proposed nonparametric procedures using an aligned method proposed by Hodges and Lehmann (1962) to reduce block information based on joint placement suggest by Jo and Kim (2013) in a randomized block design. We also compared the power of the test of the proposed procedures and established method through a Monte Carlo simulation.

• Proceedings of the KIEE Conference
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• 2002.11b
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• pp.174-176
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• 2002

전력산업 구조개편이 진행되면서 국내의 수요관리에 대한 정책도 변화하고 있는 실정이다. 수용 가에 계량 및 원격제어를 할 수 있는 시스템이 설치되고 이를 통하여 원격에서 부하를 하단하고 참여하는 수용가에 보상금을 지급하는 방식인 직접부하제어 방식은 부하 관리 자원 이용 가능성의 우의, 성과계량의 용이, 비용 효과 증대 동의 이유로 인하여 최근 많은 각광을 받고 있으며 한국전력, 에너지 관리공단에 의하여 시범적으로 국내에 도입되었다. 또한, 다수의 수용가에 대한 대표성을 가지며 수용가의 부하를 관리하여 직접부하제어를 대 행하는 민간기관인 부하관리 사업자가 국내에 생겨나게 되었다. 부하관리 사업자는 약정을 체결한 다수의 수용가 부하를 자원으로 하여 현재의 수요관리에서 직접부하 관리에 참여 할 수 있으며 향 후 도매경쟁체제에서는 확보한 부하 자원을 이용하여 다양한 방법으로 시장에 참 여할 수 있는 기회를 가지게 된다. 부하관리 사업자를 활성화하기 위해서는 수익을 창출할 수 있는 사업모델이 필요하며 활성화 되면 활용할 수 있는 부하자원의 양이 많아지게 되어 전력시장의 안정화를 위한 역할을 할 수 있게 될 것으로 기대된다.

• The KIPS Transactions:PartA
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• v.15A no.6
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• pp.351-360
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• 2008

It seems reasonable to assume that the individualized learning means more than simple teaching-learning method, so the instructional method has attracted a fair amount of attention not only in classroom, but also in the field of a adult education, cooperate education, and so on. In order to have an effect on individualized learning, we need to analyze and measure the learner's characteristic. However it is difficult to represent in quantified form because the conception and category of learner's characteristic is various and extensive. Therefore, in this paper, we propose a quantification method of learner's characteristic, which is limited to learner's cognitive structure and style, and is represented in the light of connectionism, verify the validity. The learner's cognitive structure in this paper was represented, which simplified the learner's cognitive structure. Additionally, the cognitive style in this paper was limited to inertia of knowledge for learner's cognition.

• The Korean Journal of Financial Management
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• v.22 no.2
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• pp.165-187
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• 2005

This paper tries to investigate the relationships among stock return volatility, time-varying risk premium and Korea Discount. Using Korean Composite Stock Price Index (KOSPI) return from January 4, 1980 to August 31, 2005, this study finds possible links between time-varying risk premium and Korea Discount. First of all, this study classifies Korean stock returns during the sample period by three regime-switching volatility period that is to say, low-volatile period medium-volatile period and highly-volatile period by estimating Markov-Switching ARCH model. During the highly volatile period of Korean stock return (09/01/1997-05/31/2001), the estimated time-varying unit risk premium from the jump-diffusion GARCH model was 0.3625, where as during the low volatile period (01/04/1980-l1/30/1985), the time-varying unit risk premium was estimated 0.0284 from the jump diffusion GARCH model, which was about thirteen times less than that. This study seems to find the evidence that highly volatile Korean stock market may induce large time-varying risk premium from the investors and this may lead to Korea discount.

• Archives of design research
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• v.19 no.5 s.67
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• pp.233-242
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• 2006

The purpose of this study is to investigate communication efficacy of advertisement text through audience responses. This study approached qualitatively to KT&G TV commercials. The research proceeded as follows: First, as background theory, studies on audience focusing advertisement criticism and the interpretation of advertising texts were reviewed. Secondly, the characteristics of the audiences of the advertisements, analyzed through in-depth individual interviews as well as group interviews, were incorporated into a broad theme and then divided into different dimensions. Finally, the audiences' decoding code and critic reponses in reading ambiguous advertising texts, and the interrelationship between strategic ambiguity were discussed under a unified model. The major findings of this study are as follows: In interpreting the ambiguous advertising texts, the audiences use various decoding codes such as language, visuals, technology and rhetoric, and various critic responses such as linguistic, macroscopic, schematic, non-verbal and socio-cultural factors, in quite comprehensive manner. Also, it was shown that audiences make use of different decoding strategies in terms of their recognition, reliability, emotional attitude, and behavior. It can therefore be concluded that the strategic ambiguity has its limit in explaining its effectiveness in the entire dimensions of recognition, emotional attitude, and behavior, in the sense that the strategic ambiguity is most effective in recognition while it invokes more negativity in the behavioral dimension. Finally, this empirical study, focusing on qualitative analyses, may have its limit as well; however, deeper statistic-qualitative studies in the future could compensate for it.

• Journal of Korean Society of Transportation
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• v.22 no.3 s.74
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• pp.215-226
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• 2004

본 연구는 한국 미국 유럽의 ITS 사업평가방법론을 비교분석(Comparative Analysis)하여 과학적인 국내 ITS사업평가지침 도입방안을 제언하는 것이다. 이를 위해 우리나라의 ITS사업평가의 문제점 및 국외 선진평가방법론을 분석하고 시사점을 도출하여 국내 ITS평가지침을 제도화하기 위한 정책방향을 제언하였다. 국내 외 사례(미국 유럽 한국) 비교분석결과, 국내에서도 중 장기적인 ITS 투자재원의 효율적 배분과 단기적인 시스템운영의 효율화를 위해서 과학적인 ITS평가지침(ITS Evaluation Guideline)의 도입이 제도화되어야 한다. 또한 세부추진방안으로 ITS사업을 지속적이고 반복적으로 모니터링 할 수 있는 ITS사업평가체계의 도입, ITS 서비스의 효과척도(MOE)를 과학적으로 분석할 수 있는 평가기법(운영성능평가, 경제성평가, 사전 사후비교분석, 시뮬레이션분석)정립, ITS특성을 고려한 새로운 평가기법 도입(위험도분석, 행태분석, 시뮬레이션분석) 및 기타 정책적 활용을 위한 지원(평가자료의 데이터베이스화, 한국형 ITS평가용 시뮬레이터개발, ITS사업효과 계량화 등)방안이 필요한 것으로 나타났다.

• Economic and Environmental Geology
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• v.39 no.6 s.181
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• pp.787-801
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• 2006

Focused in the characteristic of R&D on Geoscience and Mineral Resources as basic research area, we survey on methods of public works' economic impact analysis including cost-benefit analysis and resent technology evaluation methods and suggest apply-methods to conduct economic impact analysis on R&D of geoscience and mineral resources. To conduct economic impact analysis on the basic research area, it need to identification research's out-come not just output. In this perspective, we propose a method, Input-Output-Outcome Roadmapping to identify the outcome of R&D and show the relation of input, output, and outcome of R&D. Furthermore, noticing the different effects of R&D from public works, we directly evaluate the use-value of the academic theory or geological maps through Contingent Valuation Method(CVM) and others developed as evaluation methods on environmental goods. In indirect application methods, it can evaluate the partial of the pubic works' benefit with assuming R&D factors if R&D is a part of public works. If not, we evaluate the R&D's value as reductions of costs or additions of benefit with finding related public works.

• Review of Culture and Economy
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• v.20 no.1
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• pp.51-80
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• 2017

This study aims to analyze various issues and problems in the implementation process of cultural impact assessment in 2016. As a result of the analysis, it is found that the evaluation index of the cultural impact assessment is difficult to understand, and the referring data and materials in the evaluation planning phase in the process of the cultural impact assessment are deficient, and the evaluation planning is based on surveys rather than various methods. And there are some problems with evaluation scales and weighting, and they are focused on the evaluation itself rather than the feedback of the evaluation results. Therefore, this study suggests that, in the evaluation planning phase, the different methods of comparing the evaluation results according to the project execution, the project progress, and the completion time of the project should be adopted, and the project manager and the evaluation group participate developing the evaluation indicators together, and methodology for identifying causal relationship such as system dynamics will be adopted. In the stage of evaluation, it is necessary to introduce various methodology such as diverse residents participation, abundant case study, application of quantitative methodology, and the utilization of expert evaluation teams. In the evaluation feedback stage, it is necessary to provide thorough consulting based on the evaluation results.