• 전기의세계
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• v.46 no.2
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• pp.5-12
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• 1997

전기학회지의 전력전자 특집호에 게재할 원고로 우리나라를 중심으로 하는 "전력전자분야의 발전사"라는 제목이 집필을 부탁받았다. 참으로 힘든 과제이다. 한 나라의 문학이니 음악의 발전사는 그나마 그 나라의 고유전통이 있어 어지간히 줄거리를 잡을 수 있다고 본다. 그러나 개발도상국가에서의 과학기술 발전은 선진국의 후진에 머물러 있기 마련이고 결국 선진국의 발전사에 시간의 지연을 추가하면 비슷한 패턴이 될 것이라고 생각된다. 필자는 미비한 자료를 갖추고 교수생활과 학회 회원을 지내는 동안의 기억을 더듬어서 다음과 같은 내용으로 엮어 보았다. 처음에 방전관시대에서부터 Thyristor 발명까지의 Power Electronics 탄생을 위시하여 전력전자의 공학과 산업이 어떻게 한국에 정착했는가를 기술하였다. 이어서 전기학회에서의 전력전자의 역할과 국제교류의 단서가 되는 학술회의의 개최가 전력전자분야의 발전에 얼마나 기여했는가를 기술하면서 나름대로 우리나라 전력전자의 발전사로 하였다. 발전사로 하였다.

• Review of KIISC
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• v.33 no.4
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• pp.95-102
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• 2023

IMT-2030(6G)은 IMT-2020(5G)에 비교하여 많은 서비스와 기능들이 추가되고 있다. IMT-2030(6G) 요소기술 개발은 산업계에서 매우 빠르게 진행되고 있으며, 이러한 기술을 기반으로 표준개발이 ITU-R WP 5D, 3GPP 등 여러 기구에서 동시다발적으로 진행이 되고 있다. Open RAN은 시점으로는 5G 이후에 출현한 기술이지만 5G를 기반으로 실현이 가능함을 산업계에서는 보여주고 있다. 이러한 기술들을 구분 짓고 체계화 하는 것이 표준기구의 역할이라고 할 수 있다. ITU-R WP 5D 제44차 회의(2023년 6월)에서 이번 회기(2020-2023)를 종료하며 완성한 IMT Framework 문서의 내용을 기반으로 AI와 정보보호가 융합한 지능형 보안관제의 필요성, 구조와 기능에 대하여 살펴본다.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.11a
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• pp.383-386
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• 2020

최근 국가기반시설을 대상으로 하는 사이버 공격이 증가하고 있다. 이에 따라 국내외에서는 시설의 침해영향도를 고려하여 자산을 분류하고 관리적/기술적/물리적 보안조치를 수행하도록 지침 및 정책을 제시하고 있다. 그러나 국내 지침은 자산 특성을 고려치 않아 운영 측면의 효율성을 저하하고 있다. 이에 본 논문은 기존 문서의 내용을 보완한 국가기반시설 정보보안 국가기반시설 정보보안 관리체계 프로그램을 제안한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2024.05a
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• pp.895-897
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• 2024

본 논문에서는 2024년 4월부터 과학기술정보통신부 재원으로 시작하는 "디지털트윈 융합 의료혁신선도" 사업 내용을 소개한다. 본 사업은 첨단 의료기기 클러스터를 운영 중인 강원도를 중심으로 국내 디지털 의료기기 개발 혁신을 위한 디지털트윈 활용 기반 구축을 목표로 하며, 이를 위해 ▲디지털트윈 통합 인프라 구축(디지털트윈 모델, 디지털트윈 연계 플랫폼), ▲시뮬레이션 검증 인프라 구축, ▲의료기기 디지털트윈 사업화를 세부 과제로 진행할 예정이다.

• Journal of The Korean Association For Science Education
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• v.32 no.5
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• pp.991-1006
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• 2012

The purpose of this research is to find factors that affect high school science teachers' class compositions. In this research, we developed the class composing factor analysis framework and we observed teachers' class to figure out the class composing factors. The results from this research were as follows: First, the class composing factor was classified with 'positive motive factor' and 'negative motive factor'. It is the positive motive factor that teachers' voluntary motives operate to teacher for class compositions. It is the negative motive factor that outer demands operate to teacher for class compositions. Second, both positive and negative motive factors were shown in all the steps, which included preparing a class, progressing a class, and after a class. Also, according to the circumstances, each factor changed. Minimizing and overcoming negative motive factors will lead to positive interaction between the teacher and students. It will also increase a teachers' achievements in class and maximize the effectiveness of class. Therefore, it is expected that this will be a great help for teachers to enhance their teaching professionalism.

• Journal of Korean Elementary Science Education
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• v.27 no.4
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• pp.385-398
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• 2008

The purpose of this study is to understand the effect of The Model of Phases of the Moon on conception changes for preservice teachers. The researcher interviewed two preservice teachers under the agreement with them on their participation in the research just before he performed a class using The New Model of Phases of the Moon. The post-interview with the same content as the pre-interview was preformed one month later. The main content of the interview is as follows; 'Explain the shape of the Moon by drawing it.', 'Explain the relative different position among the Sun, Earth, and Moon depending on phases of the Moon by drawing them.', 'What do you think of the cause of phases of the Moon?', 'Draw a picture to explain why we always see only one side of the moon.' The results of the research are as follows. First, the class with New Model of Phases of the Moon was able to perceive the relationship of Sun, Earth, and Moon in three-dimensions rather than in two-dimensions and it helped to change their misconception that the Moon's shadow causes the Moon's shape. Secondly, the class with New Model of Phases of the Moon helped preservice teachers understand better the different positional relationships among the Sun, Earth, and Moon depending on the Moon shapes. Third, the class adopting the New Model of Phases of the Moon help preservice teachers form scientific conceptions on the causes of phase change of the Moon. Fourth, the class with the New Model of Phases of the Moon is not appropriate for explaining the reason why only one face of the Moon is seen. Based upon the results above, the researcher realized the limitation of this model and suggested that this model would help learners understand phase change of the Moon and increase space perception ability.

• Journal of The Korean Association For Science Education
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• v.35 no.4
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• pp.735-750
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• 2015

The purpose of this study is to draw an educational implication by analyzing the context of narrative texts, students' narrative thinking, and their academic achievement. We investigated text types in students' geological field trip reports, the reason why students favors narrative texts, the relationship between narrative texts and their scientific knowledge recall, and the relationship between narrative thought and academic achievement. All students used expository texts, 82% of them expressed argumentative texts, and 36% of them used narrative texts. It is likely that students use more narrative texts because students were in the context of outdoor activity and so, their emotional feelings were more activated than when they are doing lab activities. The academic characteristics of earth science seemed to contribute more narrative texts in students' reports. The post-test revealed that students with narrative texts recalled better than the others. On the other hand, there were no statistically meaningful differences in academic achievement between the two groups. However, we have noted that female students whose reports contain narrative texts achieved significantly higher scores than female students whose reports are without narrative texts. From in-depth interviews, we found that students who properly used both paradigmatic and narrative mode of thought were in a more advantageous position than those who used narrative thought only. It was also found that some narratively thinking students tended to feel uncomfortable with the way of learning or evaluating questions about science. In the future, a complementary approach of narrative and paradigmatic mode of thoughts would be encouraged by understanding students' tendency of thinking.

• Journal of Korean Elementary Science Education
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• v.41 no.2
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• pp.373-394
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• 2022

This study aimed to find out the formation of ecologically educational place identity of nature trails in national parks, which elementary school students to adults can understand, by analyzing the connectivity between characteristics (signs) of nature trails and elementary science environment-related key concepts and the domain of ecological education in the course of environment and by developing a semiotic interpretation model of place identity based on Barthes's semiotic theory. When analyzing correlations between the interpretation board-focused surrounding environment of nature trails and the content system of ecological education, this study found out that it showed the highest connectivity with the domain of 'System of Ecological Environment'. When analyzing the formation of place identity of nature trails in terms of semiotics, this study discovered that geographical locations or landscapes, artificial environments and physical elements as characteristics of surrounding environments mostly acted on the formation of placeness. Besides, it was found that both knowledge and attachment elements equally could act on the formation of a sense of place. Being likely to develop through interaction between placeness and a sense of place, place identity was mostly composed of behavioral internal stages and sympathetic internal stages. To diversify the formation of place identity, however, this study found it necessary to develop environment education projects and create surrounding environments and interpretation boards with the environmental uniqueness of nature trails reflected much more.

• Journal of The Korean Association For Science Education
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• v.27 no.1
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• pp.50-58
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• 2007

In this study, students' thoughts were searched according to the types of experiments related to the "law of definite proportions" in 9th grade science textbooks. The most common four types of experiments in textbooks were selected and analyzed for this study. It was found that the experiments needed various preconceptions and complex inferring process by students. But most of the students could not catch the concept understanding desired from the experiments. They just perceived simple observation from their senses. These phenomena were common regardless of types of experiments. These means that the level of preconceptions and inferring process for the interpretation of the experimental data did not match with students' level of thoughts. The goals of the experiments in science textbooks are to increase students' inquiry ability, and to acquire science concepts by themselves from the experiment results. But if the contents of experiments are not suitable to students' understanding level, the educational effects of the performance of these experiments were not positive. Therefore, these experiments need contents revisions for students to acquire the concept related to the "law of definite proportions" by themselves.

• Journal of the Korean Society for Library and Information Science
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• v.58 no.2
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• pp.151-175
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• 2024

This study analyzes the current status of research data management at NST-affiliated government-funded research institutes for the purpose of promoting the sharing and use of research data, and based on this, suggests methods for establishing a research data sharing and management system. The survey on the status of research data management was conducted twice in 2022 and 2023 for a total of 20 research institutes. In addition, difficulties and areas that need to be improved in the management and sharing of research data were identified, and based on this, methods for establishing a research data sharing and management system were proposed by dividing them into policy aspects, system aspects, and linkage system construction aspects. In order to establish a research data sharing system, it would be desirable to prepare a policy basis and present contents such as the definition of research data, scope of application, contents of management, utilization method, and leading institutes. In addition, for systematic and unified research data management, it would be recommended that each institute will establish and manage a repository and management system. By linking this with DataON, the national research data platform, and providing one-stop services, the accessibility and usability of data will be improved.