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學校數學의 構造的 把握 : Major Concern About the Secondary School Math 中等學校 數學을 中心으로
金永國 서원대학교 교육연구소 1982 敎育發展 Vol.2 No.1
This paper aims to introduce a term "the structure of school math.", which is supposed to be a little aide for the structural understanding of school math.. The structure of school math is an organization of essential elements which are indispensable for the learning of secondary school math.. Different from the structure of pure math., the structure of school math. Can be independent category of secondary school math. the structure of school.. the structure of school math.. To make the structure of a topic we must analyze the content of that topic in the light of the charater of modern math. and its compositional trait to deduce the essential elements. Next devide these elements into three parts. a)the elements which are related with forming a set or mathematical category. b)the elements which are related with the properties of the space. c)the elements which are related with making this space more to the purpose for the higher development. To decide where an element could be included among the above three parts there should be some criterions, and I listed them. On the adventage of structural understanding, the followings could be said. a)The structure is supposed to give a unifying comprehension of contents. b)The structure enables teachers to teach every element with more definite objectives and by appropriate methods. c)Structurally conceived knowledge has more power in apprication to the real world problems then which is not. d)If student know the structure of a topic, then they can learn others more easily. Although this structure has many benefits, there are some components which should be treated carefully. The failure of New Math. movement in America reveals many facts which we must take into consideration in teaching math. Associated with this some remarks are commented.
金永國 홍익대학교 영상애니메이션연구소 2003 디자인영상논문집 Vol.- No.3
Transmitting information of contemporary communication society has been changing tremendously beyond our imagination. We have got more used to acquire information actively through digital media than learn information passively by means of traditional printing media. Newspaper advertising need to be both visual expression effect for the moderns who avoid read newspaper and strong appeal function for the readers under the reality of advertising media. Recently, we have seen exceptional advertising using experimental typographic application instead of formal typographic advertising. It seems to suggest the device that increases lasting advertising effects applying typography character. As far as recent newspaper advertising, headline shows less important than visual image relatively. From reading newspaper to seeing newspaper in transitional period, the importance of appropriate experimental expressions in advertising headline is becoming influential with the reading basic function. It typography is important that as a view point of receiving information actively through experimental advertising headline not simply delivery information. Through using letters which are symbolic sign systems of language have to approach to the receivers with effective Information systems. In hence, seeking the organizational methods in information society expanding advertising range, it will be supposed to be efficient correspondent attitude.
GaAs/AlGaAs 양자우물 원적외선 탐지기의 제작에 관한 연구
김영국 慶南大學校 附設 基礎科學硏究所 1993 硏究論文集 Vol.5 No.-
Long wavelength infrared photodetector utilizing the intersubband transition is GaAs/AlGaAs multiple quantum well has been fabricated and investigated. The peak appears around 10㎛ and the bandwidth is 4㎛. The responsivity is 0.26 A/W and peak detectivity ?? = 1.1×?? cm·??·??.
Mg_2SiO_4 열형광체의 자외선 선량에 대한 열형광발광 특성
김영국 慶南大學校 附設 工業技術硏究所 2003 硏究論文集 Vol.21 No.1
Mg_2SiO_4 : Dy, Tb열형광체 소자를 가압, 가열하여 제작하였다. Mg_2SiO_4 : Dy, Tb 열광형체 소자의 열광이 가압, 가열온도와 가열시간에 따른 변화를 통해 최적 파라미터들을 결정하였다. Mg_2SiO_4 : Dy, Tb열형광 선량계의 글로우 곡선의 주 피크는 UV에너지와 미립알갱이들의 결정 크기에 비례함을 알 수 있었다. 자외선 조사시간의 증가에 따라서 열자극 발광의 강도는 증가하였고, TL 글로우 곡선의 주 peak는 낮은 온도 쪽으로 이동하였다. Mg_2SiO_4 : Dy, Tb pellets were made by using a sintering process, including pressing and heat treatment. In the present study, the optimum parameters of the sintering for the Mg_2SiO_4 : Dy, Tb pellets obtained such as the pressing pressure, the sintering temperature and the sinter ing time were in terms of thermoluminescence. Experimental results showed that the main peak of the glow curve for Mg_2SiO_4 : Dy, Tb thermoluminescence dosimeter was clearly correlated with the energy of the UV and with the grain size. The intensity of the TL glow curve increased and its main peak position shifted to lower temperature with increasing UV irradiation time.