평가 문항을 통한 중학교 과학영재 학생들의 빛 개념 지식상태 분석

이형재,하지선,박상태 韓國英才學會 2011 영재교육연구 Vol.21 No.4

이 연구에서는 K대학교 영재교육원의 중학교 과학영재 학생들 30명을 대상으로 빛에 관한진단평가 15문항을 개발하여 적용하였다. 그리고 빛에 대한 학생들의 지식상태에 관하여 지식공간론을 활용하여 분석하고 이것으로부터 얻은 위계를 도식화함으로써 중학교 과학영재학생들의 지식상태를 파악함은 물론 교수 학습 방법을 개선하기 위한 기초자료로 활용하고자하였다. 이러한 연구 목적을 달성하기 위하여 중학교 과학영재 학생들의 빛에 대한 지식상태평가결과를 분석하였고, 문항 간 위계구조 및 개별 학생들의 지식상태를 분석하였다. 그 결과학습 집단 내에서 개인별로 서로 다른 지식구조를 갖고 있었고, 이에 따른 학습 진단도 서로다르게 평가해야 함을 알 수 있었으며, 평가 문항과 문항 간의 관계(위계 구조)와 개별 학습자의 지식상태를 알 수 있게 한다는 시사점을 얻을 수 있었다. In this study, we developed and applied 15 evaluation questions about light to 30middle school students in K University Science Education Institute for the Gifted .Then we used the theory of knowledge space and analyzed the middle school ScienceGifted Students' knowledge state about light. By schematizing the hierarchy from it, weintended to not only measure students' knowledge state about light, but use it as thebasic materials to improve teaching methods. To achieve the purpose of this study, weanalyzed the evaluation results and individual knowledge state and hierarchy ofquestions. As a result, there were different knowledge structures in the individual, andwe found that we should diagnose them differently. In addition, we have hadimplications that it has the connection with each questions and the individualknowledge state.

폐쇄형 원심펌프의 임펠러유동해석

김태한,권형정 동의공업대학 2001 論文集 Vol.27 No.1

Compute simulations for closed type centrifugal pump is carried out using the commercial code CFX Tascflow. Computed results, which are pressure, velocity between impeller and other impeller, required power and performance etc, was compared with actual experimental data. We found that there are hard loads due to velocity and pressure at in/outlet impeller, and pump head is within 10% error limit when volute head loss is considered to 20% loss of total head. Accordingly it is possible to get optimal impeller shape through the iteration improvement works. But, as this study was done for only impeller in order to confirm the validity of Tascflow program, computation including the volute is required for actual comparison. For this, volute data treatment process for grid generation remains with future projects.

生物學的 改良劑를 利用한 슬럿지의 脫水

김형석,신남철,이태호,박승조 동아대학교 환경문제연구소 1991 硏究報告 Vol.14 No.2

To conditioning sludge to occure in the course of food processing industry, after culturing Rhoodotorula glutinis, dosing a certain amount of culture solution into the sludge and measured the variation of total suspended solids and then, in the aerobic and anaerobic conditions after manage sludge, examining the result of measured specific resitance, the coefficient of cmopressibility to know the dewateability. Arrangements of this result are as follows : 1) As the result of total suspended solids concentration by change of aeration time and the amount of Rhodotorula glutinis dose, optimal dose was Rhodotorula glutinis 10㎖ by 20㎖ sludge. The very suitable aeration time was 4-5days. 2) After dosing biological conditioner(Rhodotorula glutinis) 60㎖ by 11 sludge in aerobic condition, aeration for five days. The results of specific resistance, the coefficient of compressibility were 22.71×10^(5)m/㎏ 1.6, respectively. 3) In the cases of using Rhodotoruls glutinis for biological conditioner, using polymer for chemical conditioner. This results are as follows : Biological conditioner ; the moisture content of sludge cake 77.7% Chemical conditioner ; the moisture content of sludge cake 70.3% But, I author propose that biological conditioner is more useful than chemicals in the total operating and maintenance cost.

Glycol Oleates의 합성과 절삭유제로서의 물성

최형기,이호식,이치우,강신춘,노시태 한양대학교 공학기술연구소 1993 공학기술논문집 Vol.2 No.1

Glycololeates for the application of cutting fluid were synthesized from oleic acid and glycols such as ethylene glycol, diethylene glycol and triethylene glycol. The ratio of glycol-monooleate and dioleate in product according to the reaction condition was analyzed by TLC, CC and HPLC. Properties of glycololeates as cutting fluid were examined by various testing methods such as profile test, pH test, anti-foaming test friction coefficient test and emulsion stability test to compare those of base oil and cutting fluid trading in the market. Non-catalytic reaction of glycololeates synthesis was showed too low conversion rate, but too fast conversion rate and deep color deterioration of products was obtained with acid-catalyses reaction. Using the SnCl2 catalyst, conversion rate was medium range and products which suitable for the application of cutting fluid with mild colored and with desirable mono- and di-oleate composition was obtained. Cutting fluidal properties of glycololeates with SnCl2 catalyst were better than those of base oil, and were similar level to those of cutting fluid containing various additives.

정신분열증 환자에서 Risperidone과 Haloperidol이 혈장 Homovanillic Acid와 5-Hydroxy Indolacetic Acid농도에 미치는 영향

여운태,김중영,김영섭,곽용태 용인정신의학연구소 1998 용인정신의학보 Vol.5 No.2

교육대학원에 있어서 초등 과학교육 영역의 중요성과 그 운영방안

오진태,옥치율,한영욱,이형철,김용권,임채성 釜山敎育大學校 1994 부산교육대학 논문집 Vol.30 No.1

The future society is expected to be rapidly change in all areas, that is, the length of change time is becoming much smaller than that of generation time. It is very important to prepare the citizens who possess scientific literacy which actively cope with the rapid changes and specialization of society. The sources of rapid changes may be due to the developments in science and technology. Therefore, the importance of science education will be increasingly high. Scientific literacy should be improved basically and systematically from the early stages of formal education. Teachers who are responsible to educate children should be able to research in the areas of science education as well as science itself, and to have capacity to transmit them to the classroom. To do this, the graduate course and the science education within the system beyond the level of college education are essential parts of teacher education. In the graduate course, it is important that science itself and pedagogy of science should be balanced.

Dickinson의 Death Poems

金亨泰 韓社大學 1980 대학논문집 Vol.10 No.-

Emily Dickinson contemplates or 'observes' death and immortality in so many ways. But in general her death-immortality poems can be grouped into two. One is the type that the observer herself plays the role of a dying person, the other is the one that she watches process of other people's death. Dickinson is so faithful to her own soul that she even tries to examine death as if she herself were dying. It seems to her that Death approaches like a lover with some evil contrivance or like an emperor with a majestic air, or stings like a bee, visits like a friend, kills mercilessly like an assassin, makes a surprise attack like a snake, or so forth. The effects death has on a human body are stony coldness, dead silence, and fearful numbness. Death in Dickinson's poems, however, means soul's entrance to a timeless dimension which she leaves in mystery. The port's agony lingers between Death's two contrastive effects-the body's sufferings and decay, and the soul's rest and immortality. And one of the strongest point of Dickinson as a poet is that she most fruitfully uses very simple and familiar images in our everyday life even when she deals with the very heavy subject death.

정신분열병 환자의 말초 임파구에서 D5도파민 수용체 mRNA의 변화

김형섭,곽용태 용인정신의학연구소 1998 용인정신의학보 Vol.5 No.2

초고주파 소자 해석을 위한 벡터유한요소법에 관한 연구

김영태,김형석 순천향대학교 부설 산업기술연구소 2001 순천향 산업기술연구소논문집 Vol.7 No.1

In this paper, the vector finite elements are abopted to calculate eigenvalues of RF and microwave components. Simulation results show that spurious solutions are completely avoided because of the divergence free nature of the vector elements. This paper seeks to extend these low-order elements to higher orders to improve the accuracy of numerical solutions. Investigation of numerical results for a rectangular waveguide was provided. A vector finite element program was implemented to allow propagation constants and electric field distributions to be directly computed in the rectangular and circular waveguides which are partially filled with the dielectric.

AMESim를 이용한 유압 굴삭기용 Main Control Valve의 해석에 관한 연구

임태형,최종환,양순용,이병룡,안경관 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-

The hydraulic excavator has been a popular research object for automation because of its multi-workings and economic efficiency. When it works crane tasks, most of disasters happen. The objective of this paper is to design each components and to construct boom, arm, bucket circuit. These models modeled with AMESim show us change of variables and behavior of excavator. Simulation model will be used for simulator of excavator.