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진로탐색을 강화한 수학과 자유학기제 통계 프로그램 개발 및 적용
강태경 ( Kang Tae Kyung ),이서빈 ( Lee Seo Bin ),고상숙 ( Choi-koh Sang Sook ) 한국수학교육학회 2017 수학교육 Vol.56 No.2
This study was to investigate the effect of the statistics education program for the test-free semester. Two tests of questionnaires were used after revising some items for the subjects and statistical contents covered according to the purpose of the study during the 2nd semester, 2016. one was for finding students` attitude toward statistics and the other for understanding my career exploration. The statistics education program was developed for 5 lesson units and was applied to two classes with 53 students of one middle school in Gyeonggi-province. The results showed that students` understanding on career exploration was improved especially, in self understanding, perceiving career world related to statistics, and economical & educational understanding in statistical career. Also, the three areas such as interest, value, and effort among five areas about students` statistical attitude which was measured by the attitude test revised from the previous study, were improved with statistical significance. Moreover, we analyzed the degree of students` satisfaction over the program. Most of students were satisfied with the program saying that “I could not believe it is over now. The time has gone so fast.” or “My mentor(a pre-service teacher) helped me a lot.” Therefore, the program for the test-free semester should include the contents for exploring future-career and relating to real life.
태양광 발전시스템을 위한 LCMPPT제어기에 관한 연구
강태경(Kang, Tae-Kyung),고강훈(Kho, Kang-Hoon),최석원(Choi, Seok-Won),한호동(Han, Ho-Dong),이현우(Lee, Hyun-Woo) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.11
This paper proposes a simple MPPT control scheme of a Current-Control-Loop Error system Based that can be obtains a lot of advantage to compare with another digital control method, P&O and IncCond algorithm that is applied mostly a PV system. An existent method is needed an expensive processor such as DSP that calculated to change the measure power of a using current and voltage sensor at the once. Therefore, it is applied a small home power generation system that required many expenses. But, a proposed method is easy to solve the cost reduction and power unbalance problems that it is used by control scheme to limit error of a current control of common sensor. This proposed algorithm had verified through a simulation and an experiment on battery charger using PIC that is the microprocessor of a low price.