• Journal of The Korean Association For Science Education
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• v.27 no.3
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• pp.190-200
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• 2007

In this study, we analyzed the uses of external representations in material units of 7th grade science textbooks developed under the 7th National Curriculum on the basis of theories and research results on learning with multiple representations. The results revealed that the frequencies of microscopic external representations were higher than those of macroscopic and symbolic external representations. The external representations with drawing and/or writing were presented more frequently than those without drawing and/or writing. Furthermore, the external representations were rarely presented on the basis of the principles (e.g., personalization principle) and/or theories (e.g., dual coding theory, cognitive load theory, and social constructivism theory) for effective uses of the external representations in learning with multiple representations. Educational implications are discussed.

• Communications of Mathematical Education
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• v.21 no.2 s.30
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• pp.153-176
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• 2007

The purpose of this paper is to analyze teaching-learning program which can be applied to mathematically gifted students in primary school, Our program is based on constructivist views on teaching and learning of mathematics. Mainly, we study the algorithmic thinking of mathematically gifted students in primary school in connection with the network problems; Eulerian graph problem, the minimum connector problem, and the shortest path problem, The above 3-subjects are not familiar with primary school mathematics, so that we adapt teaching-learning model based on the social constructivism. To achieve the purpose of this study, seventeen students in primary school participated in the study, and video type(observation) and student's mathematical note were used for collecting data while the students studied. The results of our study were summarized as follows: First, network problems based on teaching-learning model of constructivist views help students learn the algorithmic thinking. Second, the teaching-learning model based on constructivist views gives an opportunity of various mathematical thinking experience. Finally, the teaching-learning model based on constructivist views needs more the ability of teacher's research and the time of teaching for students than an ordinary teaching-learning model.

• 한국정보교육학회:학술대회논문집
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• 2006.01a
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• pp.191-196
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• 2006

오늘날 IT산업이 급속도로 진보하고 있다. 단순한 자원이나 노동력보다는 첨단과학 기술을 이용하여 얼마나 의미 있는 정보를 찾아내고 활용하는가에 따라 개인의 경쟁력이 좌우된다. 이러한 미래사회에 대비하기 위해 7차 교육과정에서는 지식 위주의 암기 교육이 아닌 창의력과 문제해결력 신장을 중요하게 여기고 있다. 그러나 아직까지 학교의 컴퓨터교육은 지나치게 기능위주의 내용이나, 단순 소프트웨어와 컴퓨터의 활용법에 관한 내용만을 강조하고 있어 이러한 취지를 잘 살리고 있지 못하다. 또한 교육자료 조차 부족한 실정이다. 이에 본 연구에서는 그동안의 수박겉핥기 식의 컴퓨터 활용법 및 소프트웨어 사용법 위주 교육에서 벗어나, 컴퓨터의 원리에 대한 내용을 연구함에 있어 초등학생들이 좀더 체계적으로 쉽게 다가갈 수 있도록 컴퓨터 과학자들을 이용하여 창의적 문제해결력을 향상시킬 수 있는 교수-학습 자료를 개발하고자 한다.

• Information and Communications Magazine
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• v.32 no.8
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• pp.83-90
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• 2015

정보통신망에서 개인정보의 유출로 인한 사회문제가 최근에 큰 이슈가 되면서 정보통신의 보안 기능이 더욱 주목을 받고 있다. 차세대 통신 기술은 정보의 전송 속도나 전송 효율성보다 정보의 보안성에 더 큰 방점이 있을 것이라는 예상도 나오고 있다. 정보보호의 기초는 암호화와 복호화를 통하여 정보가 노출되어도 원래의 정보를 파악 할 수 없도록 만드는 것이며 암호화와 복호화를 위한 암호키의 생성 및 관리 기술의 발전이 곧 암호 및 정보보안 기술의 발전과 궤를 같이 한다. 본 논문에서는 암호키 관리의 새로운 패러다임으로 최근에 주목을 받고 있는 양자 암호의 원리를 소개하고 이를 바탕으로 양자통신의 미래를 예상한다. 또한 양자 암호와 양자통신 기술을 뒷받침하는 다양한 양자 정보 처리기술의 현황에 대해서도 간략하게 살펴본다.

• Journal of Practical Engineering Education
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• v.8 no.2
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• pp.83-89
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• 2016

Flip-learning enables an effective teaching and learning in accordance with the deepening degree of engineering education as a framework that enables learning according to the individual differences of the theoretical aspects, and solving real problems and practice of the learner-centered education through the application of this. The subject of basic fluid power practice which is used in various industries requiring factory automation aims at understanding of the composition and operating principles of pneumatic components and programming of electric sequential circuits, building the design ability of pneumatic system. This subject goes by 3 hour classes with theory and practice side by side. So it has not enough time to instruct students various contents related in this subject. In this study, the instructional design was performed according to the KOREATECH (Korea University of Technology and Education) flip-learning basic model for the effective teaching of 'Basic Fluid Power Practice' in basic engineering practice courses,. And the effectiveness of flip-learning is analyzed through the students survey after performing classes.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.41 no.2
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• pp.61-68
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• 2004

Electric stimulation of teeth has been used for assessing pulp vitality. The principle is based upon the assumption that a subject feels the pain produced by electrical current stimulation of intradental nerve. Because of very high and wide range of impedance of the enamel, it is very difficult to determine stimulation levels regardless of teeth status. Most pulp testers adopt voltage stimulation method and thus, their stimulating threshold levels significantly depend on each individual. Therefore, a constant current stimulator is necessary to minimize the effect of wide variation due to different enamel thickness. And it is also necessary to test teeth vitality with a wide current range regardless of tooth impedance. In this study, we constructed a burst-wave type pulp tester to reduce the pain using a current stabilizing circuit with the maximum current of 150 uA.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.4
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• pp.345-352
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• 2019

The 2015 revised information curriculum emphasizes the ability to solve problems in real life based on the basic concepts, principles and techniques of computer science. How the contents of textbooks are designed is an important issue in terms of achievement of educational goals and whether contents can be easily and clearly communicated. The purpose of this study is to analyze the concept presentation method presented in middle school informatics textbooks by three types of text- centered type, picture-centered type, and case-centered type- to analyze differences in understanding according to individual variables (sex, subject preference). Analysis results found the figure-centered type showed the highest degree of comprehension among students, and the preference of contents design type and the difference of understanding according to sex did not show significant differences. According to the preferred subjects, understanding of the content design types were found to be significantly different according to preferred subjects.

• Journal of the Korean Chemical Society
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• v.64 no.1
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• pp.38-48
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• 2020

The purpose of this study was to analysis characteristics and changes of epistemic thinking in middle school students on class-argument activities in an argument-based inquiry(ABI) science class. Data was collected from class recording video and activity worksheets of five subjects argument-based inquiry. Results of the analysis of student epistemic cognition characteristics show that experimental data was presented the most as evidence, and depending on the ABI activity, personal experience-based evidence and evidence based on scientific principles were used. As a result of analyzing the changes between claims made before and after class argumentations on five ABI activities in an argument-based inquiry science class, student claim modifications could be classified, according to reasons for the modification, into three types: correcting incorrect claims, clarifying unclear content, and expanding the concept.

• Archives of design research
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• v.18 no.2 s.60
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• pp.255-264
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• 2005

The development of personal computers and the Internet led to changes of instructor-student and student-student relationships in design education. New resources of design education with proper materials and tools have to be offered for teaching and learning. The purpose of this research is to develop Basic Graphic Tools(BGTs) on screen that help students to practice the design principles, and to evaluate the BGTs' usability to enhance the credibility of extra tools for online design learning. The BGTs has to be developed to minimize the gap between the online and traditional classroom settings and to maximize the diverse advantage of lecture content driven from technology. Students were given certain design requirements to explore BGTs and a learning guide/performance test after the lecture to evaluate the tools. The test was performed under the e-learning program serviced by C college. This research has presented some encouraging results and raises questions toward future work: how do BGTs impact the feasibility of an online design lecture.

• The Journal of the Convergence on Culture Technology
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• v.9 no.5
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• pp.57-63
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• 2023

The purpose of this paper is to analyze the aspects of hybrid warfare and show the limits of jus in bello, a principle that evaluates the moral responsibility of the agents. As a theory of the morality of war presented in traditional warfare, the just war theory has been widely accepted. In particular, jus in bello offers the criteria of moral legitimacy regarding the actions of individuals participating in or involved in war. However, hybrid warfare, in which various aspects of warfare operate in a complex way, has obvious differences compared to traditional warfare, and this difference causes difficulties in determining the moral evaluation and attribution of responsibility for actions in war. In order to appropriately resolve the moral problems arising from hybrid warfare, it is necessary to clarify what the limitations of existing moral justification theories are. To this end, in this paper, we will first present a conceptual understanding of hybrid warfare, specify the differences from traditional warfare, and then show the limits of its application in hybrid warfare in light of the three principles that compose jus in bello.