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국민학교 고학년에 적용한 새로운 수학적 개념의 이해에 관한 연구 : 집합, 관계 개념을 중심으로 Of the Concepts in Sets and Relations
강석태 群山敎育大學 1972 論文集 Vol.5 No.-
One of several important innovations in mathematics education today is new subject matter. New mathematical concepts are considered important. According to the issue of mathematics education today, this research has been attempted to find out the extent of the scope and sequence and the ways of improving teaching method of new mathematical concepts, namely sets and relations, to be understood by the fifth and sixth grade children in the elementary school. This study has been carried out through the following process : 1) I have chosen one elementary school classroom teacher who is able to teach the new mathematical concepts to the children in the elementary school. 2) We have several meeting to determine the scope and sequence and the proportion of sets and relations in fifth and sixth grade of the elementary school. 3) With the subject matter determined, we made each lesson plan for fifth and sixth grade and taught it to each class for ten hours. 4) The achievement of the children was tested with the items which are limited the domain of knowledge and comprehension but which is not drawn up in accordance with taxonomy of educational objectives. The results were analyzed according to the determined criteria. The results of the study may be summarized as follows : 1) It is shown that we can generally teach the concepts of sets and relations to fifth and sixth grade children. According to the above statement, it suggests that we can teach the basic parts of sets concepts and basic operation to third or fourth grade children in the elementary school. 2) It is shown that when even the basic sets and relations concepts need the higher mental processes, we can not teach them to fifth and sixth grade children in the elementary school. 3) It is shown that we have to help elementary school classroom teachers understand the new mathematical concepts and practice them for the children in the elementary school.
$^{87}$Rb Bose-Einstein Condensation on an Atom Chip with T-Shaped or Dimple Wires
강석태,김승진,민동훈,이동진,김중복 한국물리학회 2017 New Physics: Sae Mulli Vol.67 No.7
We achieved a rubidium-87 Bose-Einstein condensation (BEC) in a magnetic trap by using an atom chip designed with a T-shaped wire (T+Z wire), and we analyzed the characteristics of the produced BEC. The characteristics of the newly designed T+Z wire trap were compared with those of our previous design, a Dimple+Z wire. We also compared the atom distribution, number of atoms, and temperature of the BEC produced in the T trap to that of the BEC produced in the dimple trap. The number of atoms in the BEC produced in the BEC in the new system was lower than it was in the previous system, but the new system was able to produce lower-temperature condensed atoms. This fact confirmed the stability of the bi-directional current control circuit in the new system, which is different from the circuit in the previous system.
광자기 포획을 위한 실리콘 기반 피라미드형 거울의 편광 특성 연구
강석태,이동진,김은강,김중복,엄준성,진준태,이승섭 한국물리학회 2017 New Physics: Sae Mulli Vol.67 No.7
We investigated the image of light reflected by a pyramidal mirror with a vertex angle of 70.5 degrees and a length of one side of 1.5 mm. The pyramidal mirror was produced by using photolithography, bulk etching of silicon, and electroplating. As a result, three different types of reflection paths were observed, and the changes in the polarization of the reflected light were measured for each of the three types. In addition, the polarization change was theoretically calculated by using the Fresnel equation with the reflection angle for each of the three types and the complex refractive index of the mirror. The validity of the measured values was verified through comparison with the theoretical values, and an analytical model for the change in the polarization caused by reflection from a pyramidal mirror with a vertex angle of 70.5 degrees was developed. 우리는 광 리소그라피와 실리콘의 화학적 식각 과정 및 전기도금을 통해 한 변의 길이가 1.5 mm이고 70.5$^\circ$의 꼭지각을 갖는 피라미드형 거울을 제작 하였으며, 거울 면에 의한 반사광의 상을 관찰하여 조사하였다. 그 결과, 3가지 유형의 반사 경로가 있음을 확인하였으며, 각 유형의 반사광의 편광 변화를 측정하였다. 또한 3가지 유형에서의 반사각과 반사 물질의 복소 굴절율을 고려하여 프레넬 방정식을 통한 이론적 계산을 수행하였다. 이론값과의 비교를 통해 측정값의 타당성을 검증하였으며, 꼭지각이 70.5$^\circ$인 피라미드형 거울의 편광 변화 분석 모델을 구축하였다.
강석태,유명종 제어·로봇·시스템학회 2019 제어·로봇·시스템학회 논문지 Vol.25 No.9
Terrain Referred Navigation (TRN) has been suggested to as a means to compensate for GPS vulnerabilities. TRN makes use of an interferometic ratio altimeter (IRA) to gather terrain information, resulting in a highly non-linear relation between actual altitude and estimated altitude. Therefore, TRN requires a filter which can endure high non-linearity. This paper proposed the use of immune particle filter to improve TRN performance. The proposed filter works by discriminating particles into three groups of superior, neutral, inferior particles. After discrimination, the filter replaces inferior particles to other particles. Replaced particles undergo hyper-mutation to obtain particle diversity. Simulation results have shown this procedure enhances the overall performance and robustness of the filter and TRN system.
강석태 群山敎育大學 1976 論文集 Vol.10 No.-
This note is intended to make a study on the properties of almost continious functions among the particular discontinious functions known up to now and on the relations between them. In this note, as an approach the particular analytical properties of those almost continious functions will be intensively developed.
합금표면에 대한 선택 Sputtering의 Computer Simulation
강석태 연세대학교 대학원 1983 延世論叢 Vol.20 No.1
There are two different standpoints for understanding the sputtering of binary alloys which results in enrichment of the lower sputtering component atoms in the sputtered surface layer called preferential sputtering. The one involves a kinetic model based on the collision cascades. In general the heavier components are found to be enriched in the surface layer. The other consists the differences in the physical parameters of constituent atoms., e.g., surface binding energies, etc. The Monte Carlo calculations may provide more intimate insight into these problems because these physical parameters can easily be introduce different or equal for the constituent atoms in the calculation procedure, if necessary. This calculation provides sputtering yields, energy and angular distribution for the constituent atoms in a alloy target. The pressent results suggest that the Monte Carlo calculation technique has become a useful approach to preferential sputtering.