• Ocean Systems Engineering
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• 제3권3호
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• pp.203-217
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• 2013

A PTO (power-take-off) mechanism by using relative heave motions between a floating buoy and its inner mass (magnet or amateur) is suggested. The inner power take-off system is characterized by a mass with linear stiffness and damping. A vertical truncated cylinder is selected as a buoy and a special station-keeping system is proposed to minimize pitch motions while not affecting heave motions. By numerical examples, it is seen that the maximum power can actually be obtained at the optimal spring and damper condition, as predicted by the developed WEC(wave energy converter) theory. Then, based on the developed theory, several design strategies are proposed to further enhance the maximum PTO, which includes the intentional mismatching among heave natural frequency of the buoy, natural frequency of the inner dynamic system, and peak frequency of input wave spectrum. By using the intentional mismatching strategy, the generated power is actually increased and the required damping value is significantly reduced, which is a big advantage in designing the proposed WEC with practical inner LEG (linear electric generator) system.

• 한국도서관정보학회지
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• 제30권3호
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• pp.427-456
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• 1999

This paper deals with the problems of information retrieval through full-test database which arise from both the deficiency of searching strategies or methods by information searcher and the difficulties of query representation, generation, extension, etc. In oder to solve these problems, we should use automatic retrieval instead of manual retrieval in the past. One of the ways to make the gap narrow between the terms by the writers and query by the searchers is that the query should be searched with the terms which the writers use. Thus, the preconditions which should be taken one accorded way to solve the problems are that all areas of information retrieval such as should taken one accorded way to solve the problems are that all areas of information retrieval such as contents analysis, information structure, query formation, query evaluation, etc. should be solved as a coherence way. We need to deal all the ares of automatic information retrieval for the efficiency of retrieval thought this paper is trying to solve the design of thesaurus browser. Thus, this paper shows the theoretical analyses about the form of information retrieval, automatic indexing, clustering technique, establishing and expressing thesaurus, and information retrieval technique. As the result of analyzing them, this paper shows us theoretical model, that is to say, the thesaurus browser by clustering algorithm. The result in the paper will be a theoretical basis on new retrieval algorithm.

• 제어로봇시스템학회논문지
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• 제14권11호
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• pp.1165-1173
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• 2008

An water-reuse network design has drawn attention as a systematic method of reducing fresh water usage and increasing water-using efficiency. The final goal of an eco-industrial park(EIP) is accomplishing industrial sustainability and constructing water-reuse network can be a solution. When designing water-reuse network connecting various processes which consume water, the water pinch technology can be used frequently, since it simultaneously minimize freshwater usage and wastewater discharge. In this research water pinch technology is applied to develop an effective water-reuse network in an EIP. Three scenarios based on different reusing strategies were developed. The results show that the final water-reuse network can reduce the total fresh water usage more than 30%, while the water expenses decrease by 20%. It can be concluded that water pinch technology is an effective tool to optimize water-reuse network among different industrial facilities.

• 보건교육건강증진학회지
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• 제33권4호
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• pp.79-87
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• 2016

Objectives: This study aims to identify participants-focused health education approaches for the management of metabolic syndrome. Methods: Data for metabolic parameters of 855,282 Koreans in 2012 were extracted and analysed from the data base of Korea Association of Health Promotion. Literature and documents including study protocols, program contents, evaluation reports and published articles were reviewed in relation to increasing effectiveness and efficiency of health education for managing metabolic syndrome. Results: Health education program should be based on participants-focused perspectives, in which clients' demographic characteristics, composition patterns of metabolic risk factors, and readiness of change are appreciated. Development of theory-based strategies for healthy behavior change and evidence-based program components are also important factors in designing and conducting health education intervention. Multiple health behavior intervention can offer a new paradigm for more comprehensive and efficient health education. Implementation fidelity needs to be systematically evaluated and strengthened to improve the validity of the health education efforts. Conclusion: Enhancing participants-focused health education is the responsibility of health education specialists in promoting the management of metabolic syndrome.

• 한국초등과학교육학회지:초등과학교육
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• 제39권2호
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• pp.228-242
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• 2020

The purpose of this study is to develop a student-led instructional strategy that is central to the teaching-learning process and to investigate its effects. For this study, we analyzed the learner-centered learning types (discovery learning, problem-based learning, inquiry learning) and extracted elements applicable to newly developed teaching-learning. Based on this, a student-led class strategy was established using pre-learning, teacher collaboration, small group composition, and limited open data and product presentation, and then science classes were conducted. As a result of the post-tests of the five science core competencies of the experimental group using the student-led instructional strategy and the comparative group conducting lecture-based classes, the experimental group showed higher scores than the comparative group in the scientific thinking, scientific communication, and scientific attitudes (p<.05). Based on these results, it was confirmed that the student-led class, in which the student self-adjusts the entire process of designing, exploring, and presenting learning, can help the student's scientific ability. In addition, I would like to discuss the implications of teachers' teaching-learning composition.

• 한국게임학회 논문지
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• 제14권4호
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• pp.75-86
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• 2014

본 논문은 차기 한류를 주도할 수 있는 문화콘텐츠로서 게임의 확장 가능성을 타진해 보았다. 게임이 한류문화상품으로 성장하고 확산되기 위해서는 한류게임의 지속성을 유지할 수 있는 새로운 전략을 세우고, 한류게임의 친근성을 확대시켜 호감도를 극대화시키는 스토리텔링을 계획해야 된다는 사실을 인식할 수 있었다. 더불어서 글로벌 시장에서 한국문화를 대변할 수 있는 한국형 문화게임을 개발하고, 현지화전략을 세움과 동시에 정부차원의 종합적인 지원체계를 갖추는 일이 급선무라는 사실을 파악할 수 있었다.

• Earthquakes and Structures
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• 제7권6호
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• pp.1119-1139
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• 2014

A damage-based seismic design procedure for steel frame structures is formulated as an optimization problem, in which minimization of the initial construction cost is treated as the objective of the problem. The performance constraint of the design procedure is to achieve "repairable" damage state for earthquake demands that are less severe than the design ground motions. The Park-Ang damage index is selected as the seismic damage measure for the quantification of structural damage. The charged system search (CSS) algorithm is employed as the optimization algorithm to search the optimum solutions. To improve the time efficiency of the solution algorithm, two simplifying strategies are adopted: first, SDOF idealization of multi-story building structures capable of estimating the actual seismic response in a very short time; second, fitness approximation decreasing the number of fitness function evaluations. The results from a numerical application of the proposed framework for designing a twelve-story 3D steel frame structure demonstrate its efficiency in solving the present optimization problem.

• 농촌계획
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• 제17권4호
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• pp.51-60
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• 2011

This Study has intended to extract traditional elements for making Korean traditional garden through survey on theexperts and practitioners of landscape architecture. The survey form includes questions about representative type of traditional garden, representative elements of traditional garden, and necessary elements for making traditional garden, etc. The results are as follows; 1) the representative type of Korean traditional gardens are palace and villa gardens. 2) the available traditional facilities should be applicable with contemporary culture only maintaining the original form. 3) the major traditional facilities are water-scape such as ponds and mountain streams with traditional pavilions. 4) plants should be selected in spontaneous plants in Korea but it is possible to introduce species recorded in old documents. It is difficult to suggest the method of layout and design strategies in this study, but continuous studies in this line will be helpful to designing Korean traditional garden suitable in contemporary landscape.

• 한국비블리아학회지
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• 제23권4호
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• pp.437-455
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• 2012

이 연구의 목적은 공간/장소를 중심으로 추진되는 로컬리티 기록화의 모형을 제시하는 것이다. 이를 위해 Cox 등이 주창한 로컬리티 기록화 모형과 우리나라에서 최근 이루어진 관련 연구 등을 분석하여 로컬리티 기록화의 방향과 전략이 어떻게 바뀌고 있는지 분석하였고, 이를 토대로 디지털 환경에서의 새로운 로컬리티 기록화 패러다임을 도출하였다. 새로운 패러다임에 근거하여 공간 기반의 로컬리티 기록화 모형(spanDoc 모형)을 제시하였다. 이 모형은 기록화의 원칙, 구조, 절차를 포함하며, 특히 로컬리티 기록화의 결과가 디지털 환경에서 축적되고 활용되는 구조를 보여주는 데에 초점을 맞추었다.

• 성인간호학회지
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• 제26권1호
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• pp.78-88
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• 2014

Purpose: The purpose of this study was to construct a structural equation model (SEM) that would describe the binge drinking among Korean undergraduate students. Methods: Model construction was based on the theory of planned behavior and prototype/willingness model, using the variables; intention, attitude, descriptive norm, and prototype perception of binge drinking, alcohol use disorders identification test (AUDIT), and binge drinking behavior. The analysis of data was done with both SPSS 20.0 for descriptive statistics and AMOS 20.0 for SEM. Results: The binge drinking intention was found to have a significantly direct effect in influencing binge drinking behavior. In addition, attitude, descriptive norm, and prototype perception of binge drinking were found to have a significantly direct effect in influencing binge drinking intention. The final modified model yielded $x^2$=374.2 (p<.001), df=174, $x^2/df$=2.15, GFI=.87, AGFI=.82, NFI=.89, PNFI=.73 RMSEA=.07, and CFI=.94. Conclusion: This study constructed a model that addressed the factors related to binge drinking and described the relationship of these factors in influencing binge drinking among Korean undergraduate students. Findings from this study can contribute to designing appropriate prevention strategies to reduce problem related binge drinking in undergraduate students.