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질문형성기법 적용 수업이 초등학교 저학년 학생의 창의적 인재 역량에 미치는 효과
오승연 ( Oh¸ Seungyeon ),문성환 ( Moon¸ Seonghwan ) 인하대학교 교육연구소 2020 교육문화연구 Vol.26 No.6
이 연구는 학생이 질문의 주체가 되어 학생 스스로 답을 찾아가는 질문형성기법이 초등학교 저학년 학생의 창의적 인재 역량에 미치는 효과에 대해 알아보기 위하여 수행하였다. 이를 위하여 초등학교 2학년의 통합교과(바른 생활, 슬기로운 생활, 즐거운 생활)를 대상으로 11회기(20차시) 분량의 질문형성기법을 적용한 교육 프로그램의 개발 및 적용을 통해 질문형성기법 경험 유무에 따라 초등학생의 창의적 인재 역량을 비교 분석하였다. 검사 도구는 상호 소통과 배려 속에 창의성을 얼마나 발휘하는지 분석 해 볼 수 있는 창의적 인재 역량 검사지를 활용하였다. 그 결과 질문형성기법을 적용한 통합교과 교육 프로그램이 초등학교 2학년 학생의 창의적 인재 역량 신장에 긍정적인 효과를 발휘함을 확인할 수 있었다(t=6.663, p<0.001). 이 연구에서 개발한 프로그램은 질문형성기법(QFT)의 효과적인 저학년용 교수·학습 자료 개발을 위한 기초 자료로 활용될 수 있을 것이다 This study aims to find out the effects of the integrated curriculum education program using Question Formulation Technique(QFT) in which a student becomes the subject of a question and finds the answer on his or her own on the improvement of Creative Leader Competency. In order to accomplish the purpose of research, QFT-based integrated curriculum education program of 11 sessions (a total of 20 hours) is developed, and Creative Leader Competency of second-grade elementary school students is analyzed. The examination was conducted using Creative Leader Competency test paper to analyze how creative it is to interact with each other and to be considerate. As a result, the integrated curriculum education program which applied QFT showed a positive effect on the development of Creative Leader Competency of second-grade elementary school students(t=6.663, p<0.001). The developed program will be a reference material for developing QFT teaching and learning materials for lower grades.
Materials and nano‑structural processes for use in solid oxide fuel cells: a review
Seungyeon Jo,Bharat Sharma,Dae‑Hwan Park,Jea‑ha Myung 한국세라믹학회 2020 한국세라믹학회지 Vol.57 No.2
Solid oxide fuel cells (SOFCs) are considered to be the focus of investigation for energy systems owing to their efficiency in converting chemical energy into electrical energy, low carbon footprint, and fuel flexibility. Despite their high performance and durability, SOFCs suffer from critical problems such as carbon coking, agglomeration, and poor redox stability. This review presents research on the development of nanostructures for use in commercial SOFC systems and highlights various aspects of research and applications across the globe. The materials utilized for anodes, electrolytes, and cathodes are discussed and compared, detailing how their respective properties can attain high catalytic activity, conductivity, and stability at low temperatures with the aim of direct application using diverse fuels such as hydrogen, hydrocarbons, and carbon fuels. This review also discusses and compares the various processes used for the synthesis of the electrodes and electrolytes used in SOFCs, such as physical vapor deposition (PVD), chemical vapor deposition (CVD), infiltration, and in situ exsolution, that have gained much attention with a view to increase the active areas, decrease the Ohmic resistance, and reduce the manufacturing price.
Seungyeon Choi,Dong Hoon Lee,Hee-Joung Kim,Young-Wook Choi,Sunghoon Choi 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.76 No.4
Task-based assessment of image quality using a theoretical observer model has recently gained attention in medical imaging fields. Observer models whose performance can suitably match that of a human observer under various imaging conditions have been considered a key concept for virtual clinical studies. This work focused on experimental study in which a prototype digital breast tomosynthesis (DBT) system, developed by the Korea Electrotechnology Research Institute, was used to compare the task-based Fourier metrics of a detectability index with the performance of human observers. Different angular ranges of ±7°, ±10.5°, ±14°, ±17.5°, ±21°, and ±24.5° were used to detect four different sizes of spheroidal masses with the same 15-projection samplings. A total of 16 human observers participated in the study. Human observer performance was measured using four-alternative forced choice (4AFC) tests for different detection tasks, including detecting spheroidal masses. To determine the task-based detectability index (d´), the non-prewhitening matched filter observer was calculated by analyzing the task function, local spatial resolution, and local noise of spheroidal masses. The percentage of signals correctly detected (Pc) with the 4AFC tests was then compared with the detectability index for tasks presented in 2D slices (d´^2slice). The average Pc for 16 human observers was 0.87 (range = 0.56--1). Results showed that Pc decreased as the angular range increased from ±7° to ±24.5° with different mass sizes. Our result also showed that the performance of the task-based theoretical model observer could reasonably estimate d´ for all inserted lesions of different sizes and acquired under different conditions, while presenting a trend similar to those of the human observers. Consequently, our study is expected to contribute to quantitative imaging performance analysis under various DBT imaging acquisition parameters.
Seungyeon Han(한승연),Insook Han(한인숙) 한국콘텐츠학회 2021 한국콘텐츠학회논문지 Vol.21 No.11
본 연구의 목적은 농촌 지역의 자원과 테크놀로지가 부족한 초등학교 1인 학급 환경에서 교사의 테크놀로지 활용이 학습의 향상에 어떤 도움을 주는지에 관한 질적 연구를 통해 수업 설계를 위한 시사점을 도출하는 데 있다. 연구 참여자는 초등학교 5학년 학생 1인과 교사 1인이었으며 교사 및 학생 인터뷰와 교실 수업 관찰, 학생 일지 등의 자료를 수집하고 분석하였다. 연구 결과 자원과 테크놀로지가 부족할 뿐 아니라 1인 학급 상황의 한계에도 불구하고, 기존 도구의 창의적 활용과 다양한 온라인 테크놀로지를 활용함으로써, 개별 학습자의 요구와 수준에 맞는 적응적 학습의 제공, 다른 지역 학생과의 협력학습, 교육과정의 재설계 등 학습향상을 위한 다양한 교수전략을 통해 디지털격차를 극복하고 있음을 확인할 수 있었다. 본 연구의 결과는 자원과 예산부족, 학생 수 경감에 따른 농촌 지역 학교의 위기에서 새로운 대안과 효과적 학습경험 제공의 가능성을 제시하고 있다. The aim of this study was to describe how a teacher used technologies to improve underserved student’s learning in a low-resourced rural elementary classroom and provide implications for teachers’ use of technology. The in-depth case study was conducted in a one-student classroom setting that isolated the fifth grader from social and collaborative learning opportunities. The qualitative data was collected in forms of classroom observation field notes, teacher interviews, student interviews and student’s reflection journals. Findings are as follows: First, technology partakes an import role in a one-student classroom to support student’s collaborative learning. Second, to overcome a digital divide, the teacher created a technology-enhanced environment with alternative methods of her own and supplemented teacher-created resources. Third, the teacher used technologies to support adaptive instruction based on student’s needs.