• Journal of Elementary Mathematics Education in Korea
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• v.21 no.3
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• pp.415-441
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• 2017

The purpose of this study is to develop elementary school math classes for the gifted and talented with a focus on social issues to investigate the possibility of character education through specialized subject classes. As suggested in the goals of the math education for social justice, which provide the fundamental theoretical basis, through mathematics activities with a theme of social issues, mathematically gifted and talented young students can critically perceive social issues, express a sense of mathematical and critical agency throughout the course and develop a willingness and mindset to contribute to social progress. In particular, the concept of Figured Worlds and agency is applied to this study to explain the concept of elementary math classes for the gifted and talented with a focus on social issues. The concept is also used as the theoretical framework for the design and analysis of the curriculum. Figured Worlds is defined as the actual world composed of social and cultural elements (Holland et al., 1998) and can be described as the framework used by the individual or the social structure to perceive and interpret their surroundings. Agency refers to the power of practice that allows one to perceive the potential for change within the Figured Worlds that he is a part of and to change the existing Figured Worlds. This study sees as its purpose the fostering of young talent that has the agency to critically perceive the social structure or Figured Worlds through math classes with a theme of social issues, and thus become a social capital that can contribute to social progress.

• Journal of Korean Home Economics Education Association
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• v.34 no.3
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• pp.101-116
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• 2022

This study aims to apply the problem-based learning method to a college course on 'Consumer Studies' in a teacher education program. The participants of this study were 27 undergraduate students who were enrolled in the course. The PBL class was implemented for seven weeks using two problems: proposing special lectures on economic concepts and financial consulting. The effectiveness of PBL was analyzed through self-reflective journals, self-assessment, and a learning satisfaction survey of students. The result of this study was as follows. Students achieved the learning objectives and strengthened their collaboration and communication skills with team members during the PBL process. Moreover, students improved their self-directed learning and problem-solving ability through the PBL class. The results of self-assessment, in terms of learning task performance, active interaction, and self-directed learning were generally high at 4.63 points. In addition, the overall learning satisfaction level was very high, with a score of 4.75. The results will provide effective information on PBL classes to instructors and prospective teachers and will be used as data for learner-centered PBL classes.

• The Mathematical Education
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• v.61 no.1
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• pp.1-28
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• 2022

The purpose of this study is to explore how students' fractional knowledge is related to their solving of proportion problems. To this end, 28 clinical interviews with four middle-grade students, each lasting about 30~50 minutes, were carried out from May 2021 to August 2021. The present study focuses on two 7th grade students who exhibited their ability to coordinate three levels of units prior to solving whole number problems. Although the students showed interiorization of three levels of units in solving whole number problems, how they coordinated three levels of units were different in solving proportion problems depending on whether the problems required reasoning with whole numbers or fractions. The students could coordinate three levels of units prior to solving the problems involving whole numbers, they coordinated three levels of units in activity for the problems involving fractions. In particular, the ways the two students employed partitioning operations and how they coordinated quantitative unit structures were different in solving proportion problems involving improper fractions. The study contributes to the field by adding empirical data corroborating the hypotheses that students' ability to transform one three levels of units structure into another one may not only be related to their interiorization of recursive partitioning operations, but it is an important foundation for their construction of splitting operations for composite units.

• Smart Media Journal
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• v.1 no.1
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• pp.72-79
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• 2012

This paper deals with usability issue that is one of the important user interface issues in multimedia environment. The purpose of this study is to define the concept of affordance in multimedia environment, which is adapted from product design fields and to seek development plan of more efficient interface and assurance interaction with interface. As a result, it is useful that the concept of affordance in multimedia design is applied as a 'useful clue for performing task.' Furthermore, it is possible that the concept of affordance is used as one of the improving methods of usability for users in multimedia environment.

• Journal of Korea Water Resources Association
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• v.33 no.6
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• pp.661-669
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• 2000

The accurate prediction of wave-induced currents is indispensible to analyze the beach deformation due to the sediment transport or dispersion in the surf zone, which often gives rises to serious environmental problems in the coastal region. Although many numerical models have been suggested up to now, it is not easy to properly simulate wave-induced currents, in particular, over a complex topography. In order to solve these problems, we have to understand the mechanism of wave transformation and wave-induced currents, to compare results numerical models with those of field measurements, and to find the validity and the applicability of them. And, also the validity of the model has been confirmed by the field investigation.

• Informatization Policy
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• v.18 no.1
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• pp.3-23
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• 2011

With the advent of the information era, the need to protect private information has increased rapidly. Theoretical answers to this problem in jurisprudence has been pursued in various ways over the last two decades. The purpose of this study is to find the types of human rights to information and provide directions for future studies by analyzing existing research materials. About 200 materials, including theses and dissertations produced from 1988 to the present have been collected and analysed. Lessons and implications for this study for the systematization of information rights are presented. I hope this study will contribute to future studies about information rights in jurisprudence.

• The Transactions of the Korean Institute of Power Electronics
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• v.6 no.6
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• pp.481-488
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• 2001

The sustaining driver for color AC Plasma Display Panel should provide alternating high voltage pulses and recover the energy discharged from the intrinsic capacitance between the scanning and sustaining electrodes inside the panel In this paper a novel efficient energy recovery circuit employing boost-up function is proposed to achieve a faster rise-time and in order to obtain a stable sustain voltage The principle of operation. features simulated results and experiment results are illustrated and verified on a 7.5-inch-panel with 200［kHz］switch frequency.

• Journal of Korean Library and Information Science Society
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• v.47 no.1
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• pp.21-46
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• 2016

The purpose of this article is to discuss about the progress and problems in Korean public library policies. The emphasis is on identifying both distinctive features and indigenous limitations in Korean Library Act and National Plans for Library Development. This article also investigates the current status and weakness of major policy driving forces such as national library policy committee(President's Committee on Library and Information Policy), administrative support organization, and professional associations. Finally suggested are both strategies and methods for promoting the quality of Korean public library policies, with focusing on enhancing public librarians' capacity of policy participation.

• KIISE Transactions on Computing Practices
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• v.23 no.11
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• pp.611-616
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• 2017

In the area of Information Retrieval, Query Expansion is a well-known technique that uses external knowledge to increase an inquiry generated by users. However, ambiguous words used in the query decrease the performance of search tools. In this paper, we propose a solution to the above problem, by using domain knowledge which identifies the meaning of words in the query. In particular, we present a domain centered query expansion technique that magnifies a query using domains. By comparing with various query expansion models, we demonstrate that the proposed model performs better than the other models.

• 한국사회복지학회:학술대회논문집
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• 2005.04a
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• pp.589-609
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• 2005

현대는 지식사회이다. 이는 사회복지영역에서도 예외일 수 없다. 사회복지영역에서 지식의 중요성은 이미 오래 전에 합의되었다. 그렇지만 ICT(Information Communication Technology)의 급격한 발달은 사회복지영역에서도 적지 않은 논의를 불러일으켰다. 본 연구에서는 10의 영향은 이미 전제되어있는 상태에서 변화된 조직 관리를 실증적으로 파악하고자 하였다. 사회복지가 사회의 구조적이고 파생적 문제해결에 중심을 둔 실천과학이라는 정체성을 획득하고자 하는 단초적 시도로서 지식관리가 필요하다는 전제하에, 지식관리 중 지식공유를 중심으로 연구를 진행시켰다. 즉 사회복지영역에서 이루어지는 지식공유는 어느 정도이며, 그 결과는 어떤 조직적 성과를 산출하고, 또 이러한 지식공유에 영향을 주는 전제 조건은 무엇인지를 부산광역시 사회복지담당공무원을 중심으로 파악하였다. 지식공유 관련 요인을 11개의 요인으로 재구성하여 이를 구성요인별로 나누어 분석한 결과, 동료관계 망, 보상, 상부관계, 조직 규범, 의사소통 둥의 조직 환경이 지식공유와 조직성과에 큰 영향을 주고 있으며, 특히 조직성과에 미치는 직접적 영향력 보다 지식공유를 고려한 상태의 전체 영향력이 강하게 나타나 지식공유가 조직성과에 직접적인 영향을 주고 있었다. 이에 사회복지 조직에서 조직성과를 높이는 지식공유를 원활하게 할 수 있는 환경 조성의 노력과 아울러 추후과제로서 여타 사회복지 기관에서의 지식관리 관련 연구가 필요하다.