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Seoul, South Korea

The Korean Educational Development Institute works for the South Korean Ministry of Education and Human Resource Development.It conducts research in the field of educational goals and methods, creating policy solutions.The KEDI was founded in 1972, and has since played a principal role in Korea's emergence as an educationally advanced nation. Research and development projects conducted by KEDI assisted in the laying of the educational foundation during Korea's national restoration period . Through its diverse research efforts, KEDI provided guidelines as well as lent initiative to the quantitative and qualitative expansion of school education in Korea. Wikipedia.

Park S.C.,Korean Educational Development Institute | Hong T.,Yonsei University | Koo K.J.,University of Seoul | Hyun C.T.,University of Seoul
Journal of Civil Engineering and Management | Year: 2010

Price index has played an important role in measuring the past performance of an industry, which it does by tracking the cost of the items used in the industry. It is the most widely used industry performance indicator because a small number of representative items covers a wide range of costs. The construction industry consists of various facility types that can be organized into many subcontractors' works. Unfortunately, the existing cost indexes have difficulty monitoring the fluctuation of the subcontractors' costs since they select representative items in macro-scale terms, such as the type of construction or facility. Therefore, this study was conducted to develop a selection model that can select the effective representative items included in the subcontractors' costs. To determine the characteristics of the subcontractors' costs, the curve estimation function of SPSS® 12.0 for Windows was applied to the priced bills of quantities of 30 multifamily housing projects. The results of the analysis show that the relationship between the coverage ratio and the percentage of the number of representative items follows Pareto's principle. Based on this, a selection model of representative items was developed, using the tangent function. The case study that was conducted to verify the usability of the model revealed that the proposed model can efficiently select the effective representative items from the cost items of each subcontractor's work included in multi-family housing projects. Source

Traphagan T.W.,University of Texas at Austin | Chiang Y.-H.V.,University of Texas at Austin | Chang H.M.,Korean Educational Development Institute | Wattanawaha B.,University of Texas at Austin | And 6 more authors.
Computers and Education | Year: 2010

Using a framework of cognitive, social, and teaching presence, the nature of learning experiences in a three-dimensional virtual world environment (Second Life) and a text-chat learning environment without visuals (TeachNet) were investigated. A mixed method of code frequencies, coherence graphs, interviews, and a survey was used. The results revealed that the TeachNet debates included more cognitive presence codes that indicate higher levels of cognitive processing than in SL debates. The teams were significantly different from each other in the collaboration style for developing arguments and in the ways to use utterances associated with cognitive, social, and teaching presences, and the groups' collaboration style became more established with more experience with the tasks. The three critical factors-tool, tasks and group cohesion-that affect cognitive, teaching, and social presence are discussed. © 2010 Published by Elsevier Ltd. Source

Koo K.-J.,University of Seoul | Park S.-C.,Korean Educational Development Institute
Journal of Construction Engineering and Management | Year: 2012

Oil prices may continue to rise indefinitely until alternative fossil fuels or renewable energies are commercialized. In this sense, general contractors who have the responsibility of delivering construction materials should select an optimized alternative that needs the least oil among the various combinations of truck types of logistic companies, routes, and suppliers. In this context, the objective of this paper was to develop a genetic-algorithm (GA)-based fuel-efficient transfer path selection model (GAFETPSM) for delivering construction materials with minimum fuel consumption. A GAFETPSM considers the truck type, road type, and fuel-efficiency variation by load, and the constraints of capacity, number of trucks, and total load to be delivered. Finally, a case study showed that GAFETPSM is superior to the simulated-annealing (SA)-based model in terms of fuel consumption in delivering the same weight of construction materials. It is expected that GAFETPSM could contribute to reduce the carbon-dioxide emission by using less oil. © 2012 American Society of Civil Engineers. Source

Cha S.-H.,Korean Educational Development Institute | Seo K.-T.,Woosuk University
Communications in Computer and Information Science | Year: 2011

The study is to bring up the current issues on student evaluation of university teaching and to find a way to improve the evaluation. For this, the survey was conducted with a sample of 1,690 students and 24 professors were interviewed from W university. The results are as follows. Most of students and instructors agreed to the necessity of the course evaluation and revelation of the evaluation results. However, the evaluation method and the use of the evaluation results are recognized as problematic. Findings suggest that development of valid evaluation instruments, provision of full information related to course evaluation and the active use of evaluation results by establishing a supporting and management system. © 2011 Springer-Verlag. Source

Shin G.-W.,Korean Educational Development Institute
Communications in Computer and Information Science | Year: 2011

Self-directed learning has been utilized as a method used to increase class participation rates of students in education plans and has been advocated as a target of school education in order to cultivate the 'self-directed student'. It is not apparent whether it is the advancement of self-directed learning competency that is the objective, or whether it is merely to be utilized as a method to help accomplish certain study objectives. self-directed learning requires differentiating between self-directed learning that seeks to better understand the characteristics and principles of a course of education and self-directed learning that aims to elevate self-directed learning competency depending on the objectives being pursued. These two forms of objectives in self-directed learning are executed using different learning systems and methods. In order to execute both selfdirected learning and to evaluate self-directed learning competency in schools, a close investigation needs to begin into whether these two different objectives are able to co-exist with one another or not. © 2011 Springer-Verlag. Source

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