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김경석,손수호,강흥용,임성준 한국전자파학회 1996 한국전자파학회논문지 Vol.7 No.4
주파수 점융율 데이터는 개별 주파수 채널의 실제 이용율에 대한 정보를 제공할 수 있다. 또한 스펙트럼의 예비 용량이 추정될 수 있도록 이들 주파수 대역들의 평균 이용율에 대한 정보를 제공한다. 그러한 추정치는 추가 배분 계획 및 스펙트럼 사용에 대한 새로운 기술의 영향을 평가하는 방법으로 사용될 수 있다. 본 논문에서는 국내에서 개발한 주파수 점유율 측정 시스템과 측정 방법을 제시한다. 그리고, 수도권 5개 지역의 전파감시 결과 데이터를 이용하여 주파수의 점유율을 시간대 및 지역별로 제시한다. Frequency occupancy data can provide information on both the actual ratio of usage of individual frequency channels and the average ratio of usage of these frequency bands so that the reserved capacity of the spectrum can be estimated. Such an estimate can be used for the planning of additional spectrum allocations and as a means of assessing the impact of new technologies on spectrum usage. In this paper, we introduce about the frequency occu- pancy measurement system that is developed in Korea. And, we introduce Frequency Occupancy Ratio with a time period and with a area zone by using radio monitoing measurement datas.
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EBSe 방과후 영어 프로그램의 현황, 태도 및 인식 연구:초·중등학생들을 중심으로
김경석,이현주 현대영어교육학회 2014 현대영어교육 Vol.15 No.3
The purpose of this study is to find out elementary and middle school students’ perceptions of the EBS English After-school Program and their attitudes toward it. To this end, 392 elementary school students from 42 elementary schools and 78 middle school students from 14 middle schools participated in the survey research designed to explore the students’ motivations and satisfactions, self-directed learning, and selfreportedchanges after taking the program. First of all, the results showed that elementary students were more likely to take the EBSe program because of their parents’ and teacher’s recommendations, while the middle school students took the program through peer discussions. Both groups were satisfied with the EBSe Afterschool Program and reported their English abilities, including speaking and writing skills, had been improved after taking the after-school classes. Their general attitude toward English language learning had become positive. Finally, neither group of the students much used the program at home. These were not resulted from the matter of technical support to use it. Rather, they preferred to have more interesting activities they could do by themselves at home.
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브레히트의 시각으로 魯迅(노신)읽기 -<아큐정전>과 <억척어멈과 그의 자식들>을 중심으로-
김경석 한국중문학회 2012 中國文學硏究 Vol.46 No.-
魯迅的<阿Q正傳>與布萊希特的<膽大??和他的孩子們>, 這兩部作品可說是善于描寫愚昧民衆的代表作. 這兩部作品都通過薰陶過封建文化的“民衆”的描寫, 深刻揭露“封建文化”對“民衆”的破壞. 我們所認爲布萊希特是德國著名戱劇家文藝理論家. 魯迅作爲改造國民性的思想家, 善于描寫中國人的靈魂和他們的“精神勝利病”. 這兩個作家的作品揭示了一個愚昧民衆如何走上末路鬼的道路, 又如何被社會抛入流氓無産者行列的過程, 以及這一過程中所經曆的精神毁滅的悲劇. 這兩部作品通過‘疏外’, ‘生疎化’的創作理論對民衆所帶的劣根性與他們政治意識關系的藝術思考. 同時善于描寫民衆政治意識的劣根性.這兩部作品所描寫的主題是政治意識相同的. 他們的作品里所說的主題超越時空, 提醒民衆政治意識的劣根性. 這就是硏究魯迅的<阿Q正傳>與布萊希特的 <膽大??和他的孩子們>的?一個觀點和新價値.
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김경석,배재호,한윤수 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Although dye-sensitized solar cells (DSScs) have many advantages compared to the conventional Si based solar cells, volatile liquid electrolytes limits to their commercial applications. Thus, a great deal of research work has been focusing on searching for efficient solid-state hole transporting materials (HTMs) to replace redox mediators in liquid electrolytes. In this study, all solid-state DSSCs with a biscarbazolebased hole transporting polymer were fabricated, and effects of molecular weight on the photovoltaic properties of them were examined. When a higher molecular weight polymer was applied as the HTM, the solid-state DSSC showed a higher power conversion efficiency, compared to that with a lower molecular weight polymer, probably due to an more efficient intramolecular charge transport of the higher one.
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디지털 기술을 활용한 멤브레인 서피스의 변형 기법 체계화에 대한 연구
김경석,김성욱,전유창 한국문화공간건축학회 2021 한국문화공간건축학회논문집 Vol.- No.74
In the transition from modern architecture to contemporary architecture, architects who are oriented to digital architecture have begun to embody free-form architecture with a high level of complexity by actively using digital technology in new works, which was difficult to imagine and implement in a previous way. In particular, with the advent of new materials, the introduction of material transformation and processing methods using digital technology has brought about a paradigm shift in implementing architectural forms, breaking away from the previous way of using architecturally common materials. Amid this trend, membrane surface, which were not conventional shape and form in the field of architecture, have recently become easier for architects to design without physical knowledge due to the development of parametric design tools that can easily change the material morphology. Hence, they have begun to be widely used as surface to build the skin or shape of a general building without their conventional recognition. In this study, the tensioning technique is used to define the deformation technique of the membrane surface and establish a new classification system among digital morphology techniques. Afterward, the newly developed methodology for the membrane surface is established by systemizing the type of shape generation using the established deformation technique and presenting the design process. This design methodology is meant to support the methodology for realizing the architectural shape by using the membrane surface from the actual designer's point of view and to explore the possibility of using it.
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