• 한국수학교육학회지시리즈D:수학교육연구
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• 제13권2호
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• pp.103-108
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• 2009

We present the thoughts behind a course combining the subjects of differential equations and infinite series. The key point is how to connect the two topics in a course with a natural flow.

• 자연과학논문집
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• 제13권1호
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• pp.97-111
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• 2003

본 연구는 가평스키장계획을 통해 스키슬로프의 계획기준을 살펴보는데 있다. 본 대상지는 경기도 가평군 하천리에 위치하고 있고 면적은 $1,594,001m^2$이다. 가평스키장의 설계목표는 본 부지에 가장 적합하고 경쟁력있는 스키코스를 설계하는데 있다. 설계과정은 먼저 부지조사와 분석, 설계프로그램의 지형분석의 종합, 슬로프계획, 타스키장과의 비교를 통한 특화계획 등을 포함한다. 본 스키장은 총 슬로프연장 8,738m이고 5기의 리프트와 10개의 스키슬로프로 조성되며 2개의 중급자, 3개의 중상급자, 4개의 상급자, 1개의 최상급자코스로 구성된다. 가평스키장은 모글이나 하프파이프같은 특화된 스키장으로서 상급자와 보더전용의 스키장으로 개발전략을 수립한다.

• Bulletin of the Korean Chemical Society
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• 제26권11호
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• pp.1856-1860
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• 2005

• Molecules and Cells
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• 제26권4호
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• pp.338-343
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• 2008

An embryonic stem cell is a powerful tool for investigation of early development in vitro. The study of embryonic stem cell mediated neuronal differentiation allows for improved understanding of the mechanisms involved in embryonic neuronal development. We investigated expression profile changes using time course cDNA microarray to identify clues for the signaling network of neuronal differentiation. For the short time course microarray data, pattern analysis based on the quadratic regression method is an effective approach for identification and classification of a variety of expressed genes that have biological relevance. We studied the expression patterns, at each of 5 stages, after neuronal induction at the mRNA level of embryonic stem cells using the quadratic regression method for pattern analysis. As a result, a total of 316 genes (3.1%) including 166 (1.7%) informative genes in 8 possible expression patterns were identified by pattern analysis. Among the selected genes associated with neurological system, all three genes showing linearly increasing pattern over time, and one gene showing decreasing pattern over time, were verified by RT-PCR. Therefore, an increase in gene expression over time, in a linear pattern, may be associated with embryonic development. The genes: Tcfap2c, Ttr, Wnt3a, Btg2 and Foxk1 detected by pattern analysis, and verified by RT-PCR simultaneously, may be candidate markers associated with the development of the nervous system. Our study shows that pattern analysis, using the quadratic regression method, is very useful for investigation of time course cDNA microarray data. The pattern analysis used in this study has biological significance for the study of embryonic stem cells.

• Current Research on Agriculture and Life Sciences
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• 제7권
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• pp.185-199
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• 1989

The main goal of this research was to develop a Golf course planning Methodology in terms of use and preservation of natural resources which consider balance of Ecosystem. This study suggested the necessity of analysis of natural resources in the development site prior to its planning. The analysis will give a benefits both the profits of private enterprise and national interests for reuse of natural resources. Study site was planned region of Kyungpook Country Club, which located near Weagwan. In connection with this study, natural resources which will reuse in the planning stage and soil status in the development site were analyzed.

• Natural Product Sciences
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• 제6권2호
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• pp.53-55
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• 2000

In the course of continous work for the discovery of anti-thrombotic constituents from tubers of Gastrodia elata, citric acid 1,5-dimethyl ester was isolated from ethylacetate soluble fraction prepared from the methanol extract. The structure of the compound was determined by the spectroscopic data. The anti-thrombotic effect of this compound was observed with prolonging the bleeding time in thrombin-induced thrombosis model of mice.

• Natural Product Sciences
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• 제3권2호
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• pp.104-105
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• 1997

In the course of continous work on tubers of Gastrodia elata, a new constituent was isolated from the ethyl acetate soluble fraction prepared from the methanol extract. The structure of the compound was identified as ${\alpha},{\alpha}'-[bis-2-(5-carboxaldehydo)furanyl]-dimethyl$ ether from the elemental analytical and spectroscopic data. This compound was once isolated from Cirsium chlorolepis and named as cirsiumaldehyde. This is the first furan type compound isolated from Gastrodia elata.

• 보험의학회지
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• 제16권
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• pp.23-28
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• 1997

• 한국과학교육학회지
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• 제1권1호
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• pp.61-72
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• 1978

By gettidg out from the existing class work with planning and execution in separate form of each class, and the research on each unit: it is suggested that the whole school system should be unified as oneunit through the proper restoration, and to aim the maximum effects of education, exalt thes pecialty of each teacher in the natural science course. Therefore: To select the text and material for the Element science carefully, secure the effectiveness of the study by each particulars of the text, and to establish the model for teaching properly arranged. Through the cooperative system of formational of teaching, to improve the basic knowledge of the course by deepening study objectives and separate teaching for each objects. Through the cooperative system, the main issues of the Elementary science course is solved, and by maintaining this method refine the speciality of teacher and rationalize he education operation.

• 한국과학교육학회지
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• 제25권6호
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• pp.650-657
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• 2005

The study purported to develop STS education course material at the university level in order to enhance science literacy and understanding of the relationships among science, technology and society. A developed STS course was provided to 265 freshmen and sophomore students, majoring in the Humanities and the Social Sciences, the Natural Sciences and Engineering, and Fine Arts. Students participated in the survey examining changes in students' attitudes toward and perspectives on STS before and after the implementation. Ten questionnaires were selected from VOSTS for the survey. One additional questionnaire asked the students to elaborate their opinions on the need for a STS education course. The responses to the survey were analyzed according to types of questions and students' majors. As result, the developed STS course significantly increased students' science literacy. Among the participants, 97.7% responded that there is a need for STS education and provided reasons for such need. These results imply that there is a definite need for a STS class at the university level. According to the analyses of responses, there were different responses depending on the students' major. These differences imply that the major, academic background, level of interest in science, and knowledge of science of the students affect their perceptions on identifying the need for a STS education course.