• Convergence Security Journal
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• v.23 no.3
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• pp.73-81
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• 2023

The progress in science and technology has widened the scope of the battlefield, leading to the emergence of cyber electronic warfare that exploits electromagnetic waves and networks. Drones have become more important due to advancements in battery technology and navigation systems. Nevertheless, tackling drone threats comes with its own set of difficulties. Radar plays a vital role in detecting drones, offering long-range capabilities and independence from weather conditions. However, the battlefield presents unique challenges like dealing with high levels of signal noise and ensuring the safety of the detection assets. This paper proposes various approaches to improve the operation of drone detection radar in cyber electronic warfare, with a focus on enhancing signal processing techniques, utilizing low probability of interception (LPI) radar, and implementing optimized deployment strategies.

• Journal of the Korean School Mathematics Society
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• v.25 no.3
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• pp.261-278
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• 2022

The purpose of this study is to develop an assessment to diagnose difficulties in learning mathematics and misconstructions that elementary students have. With thorough theoretical background and analysis of mathematics curriculum documents, we established learning trajectories for the following content areas in grades 3 to 6: number and operation, regularity, data and chance, geometry, and measurement. Then, the research team created the assessment items targeting a specific stage in the learning trajectories and including item options to identify possible misconceptions. Based on the unified validity theory, we reported the detailed procedure of the assessment development and the evidence for the content, substance, and structural validity of the assessment. We collected the data of 675 elementary students. Rasch measurement modeling was applied, and Cronbach's alpha was estimated. We considered how to report students' assessment results to teachers appropriately and immediately, which suggested important implications for supporting teaching and learning mathematics in elementary schools. We also suggested how to use the assessment developed in this study in online and distance learning environments due to the COVID-19 pandemic.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2019.05a
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• pp.298-299
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• 2019

In this paper, we propose a stable mutual authentication protocol between unmanned combat systems in tactical wireless networks where long distance communications are not always guaranteed due to a poor channel condition. The proposed protocol generates an authentication code using hash collision of arbitrarily selected random data. The authentication requester encrypts and transmits it to the authenticator. They performs authentication by sharing the valid authentication code. We analyze the safety of the proposed method for various attack scenarios.

• School Mathematics
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• v.10 no.2
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• pp.297-317
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• 2008

This study was designed to gain insight to adopt CAS into secondary level algebra education in Korea. Most inactive usage of calculators in math and most negative effects of calculators on their achievements of Korean students were shown in International studies such as TIMSS-R. A comparative study was carried out with consideration of mathematical backgrounds and technological environments. 8 Korean students and 26 US students in Grade 11 were participated in this study. Subjects' Problem solving process and their strategies of CAS usage in classical Box-problem with CAS were analyzed. CAS helped modeling by providing symbolic manipulation commands and graphs with students' mathematical knowledge. Results indicates that CAS requires shifts focus in algebraic contents: recognition of decimal & algebraic presentations of numbers; linking various presentations, etc. The extent of instrumentation effects on the selection of problem solving strategies among Korea and US students. Instrumentation

• Journal of the Korea Convergence Society
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• v.8 no.6
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• pp.171-180
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• 2017

This study was executed to verify the effects of individual and environmental characteristics of secondary-school teachers on teacher efficacy and job satisfaction. To do so, a survey of teacher efficacy and job satisfaction was conducted to 696 man and woman teachers from 55 secondary schools in Gwangju and Jeonnam province, and then the results of the survey were analyzed. In this study, teacher efficacy was composed as four factors: sense of calling, teaching-learning, colleague relation and school organization. And job satisfaction was categorized as three factors: job relation, compensation system and working environment. The Multivariate analysis results showed a significant difference in teacher efficacy and job satisfaction according to teachers' individual characteristics and working environment. Conclusively, teacher efficacy and job satisfaction are complicated factors formed by teachers' individual and environmental characteristics. To improve secondary-school teachers' teacher efficacy and job satisfaction, it is necessary to develop training and education programs reflecting individual and environmental characteristics.

• Journal of The Korean Association For Science Education
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• v.38 no.6
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• pp.853-864
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• 2018

In this study, we surveyed the 68 teachers from eight science high school and four science academy for the gifted through questionnaires about research ethics education and ethical research environment in Korea. First, we examined the current state of research ethics education. Half of the responding schools included research ethics education in their curriculum. Although only half of the schools have this in their curriculum, more than half of the total number of teachers surveyed personally taught research ethics in class, and almost 90% of the teachers said they taught the research ethics during students' research activity. However, 63.24% of teachers said that research ethics education was not enough still. Second, we investigated the ethical research environment. In terms of knowledge and experience, the teachers were competent, and they were creating an environment that enabled peers and self-verification. However, research ethics, regulations and verification systems are not well equipped in schools. Since the principals are highly interested in research ethics education, there seems to be enough improvement on the ethical research environment. Finally, teachers said that additional research ethics education, change in student attitude, development and continuous maintenance of the verification system, encouragement to develop ethical environment, and clear guidelines were needed for ethical research of students. The result of this research will be able to provide the following. First, it will help set up a direction for research ethics education at every gifted school. Second, it will provide insights on how schools and teachers can create an ethical research environment for the students of science-gifted students.

• The Journal of Korean Philosophical History
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• no.28
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• pp.155-182
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• 2010

When we divide Environmental Ethics education into the elements of 'knowledge - emotion - behavior', we need to focus on 'knowledge' at high school level. In general Moral Education, 'knowledge - emotion - behavior' is a circular link, but as Environmental Ethics is a matter of 'consciousness', it is desirable to instruct with the process of 'knowledge>emotion, behavior'. Teaching 'Consciousness on Nature' is not recommended at elementary or middle school level because it demands higher inference. On the contrary, considering the reality in high school it is not recommended to teach the necessity and method of recycling or to go field trip to the polluted area. Rather, it is better to inform the students of Environmental Ethics' viewpoints and let them know the ways of moral judgments. The view of nature in Orientalism is well explained through the Environmental Ethics' viewpoint. To explain the view of nature in Orientalism we should concentrate on the theory, not on the attitude of life. And we should rather compare the viewpoints of nature in Confucianism, Taoism and Buddhism respectively than explain in Orientalism all together. That is, if we compare with the viewpoints of Environmental Ethics and explain similarities & differences in Confucianism, Taoism and Buddhism, we can complement Environmental Ethics or present the third approach.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.11b
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• pp.765-768
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• 2003

실업계 고등학교는 산업계에 우수한 기능인력을 양성 공급하여 국가의 경제 발전에 그 동안 크게 이바지하여 왔다. 그러나 지식기반 사회의 도래에 따른 직업세계의 변화, 국민소득 향상과 핵가족화로 인한 고등교육에 대한 욕구 증대 등 제반 사회 환경의 변화로 인하여 최근 들어 진학위주의 교육풍토가 조성되면서 새로운 변화에 직면하고 있다. 해마다 진학을 희망하는 학생 수는 증가하고 있고, 대학 입시유형은 다양하고 복잡해지는데 비해 실업계 고등학교의 현실은 한 두 명의 진학담당 교사에 의해서 대부분의 업무가 처리되고 있다. 진학을 희망하는 학생들을 조사하여 진학관련 자료를 별도로 작성한 후 상담을 할 경우 일일이 찾아야 하는 불편함과 한 학생이 여러 대학을 지원할 수 있기 때문에 상담 시 많은 시간이 소요되고 있는 실정이다. 본 논문에서는 보다 효율적이고 체계적으로 진학지도에 도움이 될 수 있도록 웹을 기반으로 한 진학 정보 시스템을 설계 구현하였다.

• The Journal of Korean Association of Computer Education
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• v.19 no.5
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• pp.1-9
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• 2016

In this paper, We evaluated students' computational thinking in elementary school for SW education. Also, we analyzed on the difference of students' computational thinking according to the level of school's educational information. As a result, We confirmed that students' computational thinking were deferent according to the experience of schoolmaster's SW education and the ICT infra of school. In particular, students' computational thinking were meaningfully deferent according to the SW education experience of schoolmaster, the number of mobile devices for education and the speed of school network. Accordingly, we proposed the policy to heighten the effect of SW education. The policy were the extension of SW education for teacher, school network infra and mobile device for education.

• The Journal of the Korea Contents Association
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• v.12 no.7
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• pp.368-377
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• 2012

The comprehensive countermeasures against school violence recently announced by the government include some content on physical education classes. Physical education has long been ignored in school paradoxically in spite of the deteriorating physical strength and health of adolescents. The physical education subject undervalued in the middle of overly excessive competitions for college entrance exams finds its core goal in whole person education and officially emphasizes the development of personality aspects, which means that physical education claims important significance by providing diverse approaches to school violence prevention. This study thus set out to enhance the roles of physical education for school violence prevention. In Korean society, school violence has taken deep root due to the combined results of individual, family, school and community factors, the growth-first policy driven by compressed modern growth, and neoliberalism based on economic efficiency. School violence possesses such fixed value systems and convictions in Korean society. Education has failed to achieve some effectiveness because of the serious level of school violence, which calls for assessment of ideology having big impacts on educational environments. Given that it has been rediscovered that physical education has legitimacy of alleviating or preventing school violence through its value, an alternative to eradicate school violence should start with physical education normalization in school. Specific alternatives including the activation of sports clubs in school will be established as more fundamental practical alternatives when accompanied by the development of school violence-related programs and the operation of in-service training programs for physical education teachers.