• 대한수학교육학회지:학교수학
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• 제12권3호
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• pp.439-454
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• 2010

본 연구는 두 명의 중학교 2학년 학생들이 어떻게 단위 분할 도식의 수정, 변경을 통하여 분수나눗셈 상황에서 그들 자신만의 자가-생성 알고리듬을 만들어 나가는지 보여주고 있다. 교육실험이 연구방법으로 사용되었고, 일년간 행해진 교육실험 중 일부분의 자료가 본 연구를 위해 분석되었다. 두 명의 참여 학생들은 기준단위와 제수사이의 상호 관계 구성과 활용으로 분수나눗셈을 위해 전통적으로 학습되어 왔던 '뒤집어서 곱하기'와 같은 역할을 하는 그들 자신의 자기-생성 알고리듬을 구성할 수 있었다. 본 연구결과는 또한 학생들이 만들어 낸 알고리듬을 이해할 수 있는 것이 훌륭한 수학 교사로서의 질을 결정하는 하나의 요소로 고려 되어야 함을 보여주고 있다.

• Journal of Advanced Marine Engineering and Technology
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• 제36권1호
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• pp.133-140
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• 2012

In this study, a reliable control scheme with PID combined controller will be considered. The combined controller in this study is PID algorithm with parameters tuned by using ILC (iterative learning control) approach. The controller was applied to the vibration isolator using an induction motor which works as an actuator. This isolator is developed to eliminate the influence of vibration from rotating machineries on the small ship. The NI cRIO real time controller with FPGA is loaded to get or generate control signals. Crank mechanism which converts rotating energy into translational force is adopted and the relation between control force and torque generated from actuator is also analyzed. A Labview program is composed for controlling practice. Experimental results will be described to show the effectiveness of the proposed control schemes.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
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• pp.775-779
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• 2002

Currently, high-resolution satellite imagery such as KOMPSAT and IKONOS has been tentatively utilized to various types of urban engineering problems such as transportation planning, site planning, and utility management. This approach aims at software development and followed applications of remotely sensed imagery to transportation geographic analysis. At first, GDPA (Gradient Direction Profile Algorithm) and main modules in it are overviewed, and newly implemented results under MS visual programming environment are presented with main user interface, input imagery processing, and internal processing steps. Using this software, road network are automatically generated. Furthermore, this road network is used to transportation geographic analysis such as gamma index and road pattern estimation. While, this result, being produced to do-facto format of ESRI-shapefile, is used to several types of road layers to urban/transportation planning problems. In this study, road network using KOMPSAT EOC imagery and IKONOS imagery are directly compared to multiple road layers with NGI digital map with geo-coordinates, as ground truth; furthermore, accuracy evaluation is also carried out through method of computation of commission and omission error at some target area. Conclusively, the results processed in this study is thought to be one of useful cases for further researches and local government application regarding transportation geographic analysis using remotely sensed data sets.