• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.591_592
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• 2009

For a similar price signal to local consumer, a regional clustering is important that can transfer a equal sign to the bus which has each different price on the basis of bus. If you take LMP and local information this method into consideration at the same time, and you give weight on neither one side, buses on a borderline can move on arbitrary. For solving this problem, in this paper will propose a clustering method to have applied new concept called 'electric distance'.

• 복식문화연구
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• 제8권4호
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• pp.562-576
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• 2000

The purpose of this study is to semiotically reinterpret the Korean beauty and symbol inhering in the modern clothing of Korean designers as the context of traditional culture through regarding the clothing including hegemony that is controlling the Korean society and culture as a sign. The theoretical framework for analysis was derived from the semiotically analytic methods of F. Saussure and R. Barthes. The results of the study are as follows ; Korean images reflected in the modern clothing designed by Korean designers are humanistic image, environmental-friendly image, totemic and mythlogical image, equal and peaceful image, and metaphorical and metonymical image. Conclusively, developing a creative design based upon the interpretation of our unique and traditional culture, the clothing could be newly made of historical and cultural resources in the modern lives. If so, I think that the clothing will be not only the visual and decorative art, but also an information which contains implication of our culture, and finally can be established.

• Bulletin of the Korean Chemical Society
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• 제4권4호
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• pp.157-161
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• 1983

Ab initio calculations were performed on systems containing various basic ${\pi}$ fragments and glycines to generalize the ${\pi}$-nonbonded interaction (${\pi}$-NBI) method of determining relative conformational and configurational stability of organic molecules. It was found that the relative stability of conformational isomers can be determined in general by the simple application of the ${\pi}$-NBI method, but the method is not applicable to the geometrical isomerism in which stronger structural factors are involved. The ${\pi}$-NBI effect of a crowded ${\pi}$-structure ($n{\pi}/m$) is maximum for the system in which n is equal to m. In crowded structures containing heteroatoms, ${P^{\pi}}_{ij}$ values of 4N+1 system may become negative, but this sign reversal does not invalidate the predictions based on the ${\pi}$-NBI method.

• 한국학교수학회논문집
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• 제12권3호
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• pp.267-289
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• 2009

학생들은 변수가 등호의 좌변에 있는 일차방정식보다 우변에 있는 일차방정식 문제를 해결하는데 어려움을 겪고 있다. 이러한 어려움을 학생들이 극복할 수 있도록, 기본적인 여러 유형의 일차방정식 문제를 경험할 수 있는 기회를 제공하여야 할 것이다. 그리고 일차방정식의 교수 학습에서 여러 유형의 평가 문항을 구성하여 테스트 한 후에 학생들의 풀이 과정을 면밀히 검토하거나, 개별 면담을 통하여 학생들의 학습상황을 파악하고 이를 토대로 피드백을 통한 오류 교정이 이루어져야 할 필요성이 있다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1995년도 가을 학술발표회 논문집
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• pp.284-292
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• 1995

This paper is on experimental study on the behavior of reinforced concrete columns subjected to longitudinal steel ratio To investigate the effects of concrete strength and longitedinal steel ratio on the behavior of reinforced concrete columns. a series of tests were carried out for thirty-six tied reinforced concrete columns with a 100mm square cross section and three slendemess ratio of 15, 30 and 50. And To study and illustrate the change of the ultimate loads and that of displacements, two different concrete strength of 180,26kfg/$\textrm{cm}^2$, 819,36kfg/$\textrm{cm}^2$ and five different longitudinal steel ratio of 0.5, 1.0, 4.0, 5.7 and 10.3% were used. The boundary conditions at the ends were both hinged and the end eccentricities (17mm) were equal and of the same sign. While the ultimate load capacity of high-strength concrete column was much increased when the columns were short, that was not when the columns were slender. The effect of longitudinal steel ratio on the increased of ultimate load of column was more evident for slender columns than for short ones and the ultimate of longitudinal steel ratio were more pronounced with increasing concrete strength. The more inserted the longitudinal steel, the more increased the ultimate load, but the superabundance of longitudinal steel ratio over the limitation of maximum steel ratio in ACI code was used, it was showed that the ultimate load was rather decreased.

• 항공우주정책ㆍ법학회지
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• 제1권
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• pp.125-146
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• 1989

This paper is examine the problems of U.S.-Korea Air Service Agreement and recommend some directions for its improvement under the rapidly changing circumstance and growing importance of Korean penisula. Since the provisional agreement of 1949, U.S. -Korea Air Service Agreement has consistently been favorable to U.S. side. Fair and equal opportunity is the principle and basis of the bilateral air agreement. Notwithstanding such principle, it is only the U.S. carriers who can freely enter into any market, under the discretion of business strategy, while Korean carrier can serve only three points including Honolulu. In an effort to recitify such serious imbalance, Korea continuousely requested additional rights and has given utmost efforts to accommodate requests made by U.S. carries without much success. When we review aviation market between Korea and U.S. under the present agreement, Korea is fully open to U.S. carries as they can connect from any or all points in the U.S. via any or all points in Korea and all points beyond Korea. Increased number of U.S. carriers are enjoying greater utilization of the opportunity accorded them. Four(4) U.S. carries now operate to Korea using thirteen(13) gateway points and about one hundred fifty(150) on-line points in the U.S. such imbalance can be well understood when we review the exchange of traffic rights between the U.S. and the Pacific rim countries. During the yeras following the 1978 agreement with Korea, the U.S. proceeded to sign liberal agreements with Thailand, Taiwan, Singapore and the Phillipines. In exchange, the U.S. granted the four Pacific rim countries substantially greater rights than were granted to Korea, although Korea was the first Asian nation to sign a pro-competitive aviation agreement which granted U.S. carriers unrestricted market access and pricing flexibility. Moreover, Korea ranks the 2nd trading and tourist partner to the U.S. among the Pacific rim countries (Japan is the largest partner to the U.S. in terms of both trade and tourist market). In this paper such problems in the Korea-U.S. Air Services Agreement are analyzed in terms of historical perspective, U.S. Aviation policy, imbalance status in detail cases, discrimination to Korea comparing to other Asian countries, and theoretical application. And further it discusses current aviation issues between Korea and U.S. such as the ratification of 1980 MOU and various doing business issues of U.S. carriers in Korea. Finally, this paper concludes the analysis and suggests some directions to improve and rectify the problems and imbalance of U.S.-Korea Air Services Agreement in question.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제19권3호
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• pp.223-247
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• 2016

초등 수학 교육에서 대수적 사고의 중요성이 부각되는 것과 관련하여 본 연구에서는 우리나라 3학년 학생 197명을 대상으로 대수적 사고에 대한 전반적인 실태와 문제해결 과정에서 드러나는 특징을 살펴보았다. 특히 우리나라 초등 수학과 교육과정에서는 대수적 사고 요소를 성취기준이나 지도상의 유의점으로 명시하고 있지 않지만 암묵적으로 지도되는 실정이기 때문에, 대수적 사고 요소를 강조한 외국의 사례와 비교 분석함으로써 우리나라 학생들의 대수적 사고의 특징을 파악할 것으로 기대되었다. 연구 결과 대체적으로 대수적 사고 요소에 대한 학습이 이루어진 선행 연구의 집단과 유사하게 높은 정답률을 보였다. 반면 우리나라 학생들이 사용한 해결 전략의 특징으로 등식과 방정식을 해결하는 과정에서 구조적인 전략 보다는 계산적인 전략이 주도적으로 나타났으며, 대수식을 나타낼 때 등호를 사용하여 구체적인 수를 도출하려는 경향을 알 수 있었다. 본 연구를 통하여 우리나라 초등학교 3학년 학생들의 대수적 사고에 대한 전반적인 실태를 파악하고 대수적 사고의 지도 방향에 대한 시사점을 모색하는데 도움이 될 것이라 기대한다.

• 한국학교수학회논문집
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• 제20권2호
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• pp.141-161
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• 2017

초등학교에서 자연수의 혼합계산은 사칙계산이 섞여 있는 수식의 계산 순서를 알고 해결할 수 있는 능력을 길러 주는데 초점을 두고 있다. 이런 목표에 비추어 본 연구에서는 초등학생 67명과 예비교사 57명을 대상으로 수식과 문장제로 이루어진 검사지를 이용하여 혼합계산에 대한 해결 정도와 오류 유형을 분석하였다. 검사 결과, 초등학생들은 수식과 문장제로 된 혼합계산에서 86.2%와 73.5%의 정답률과 수식에서 계산 순서의 오류, 문장제에서 수식을 구성하지 못하는 오류를 나타내었다. 예비교사들의 경우에 나타난 몇 개의 오류와 해결과정에 비추어 혼합계산이 이루어지는 식의 계산 원리와 규약을 이해할 수 있도록 교과 교육 내용을 유의해서 지도할 필요를 제시하였다. 또한 검사 결과를 통해 혼합계산 시 괄호 사용의 유무와 적절성, 등호 개념의 사용 방법에서 문제점을 확인할 수 있었다.

• 신재생에너지
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• 제4권4호
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• pp.30-36
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• 2008

The possibility of whether the induced wind from a vehicle traveling on highway can be used in wind power generation has been verified through computational flow analysis. The bus which is presumed to accompany relatively strong and wide range of induced wind compared to passenger vehicles because of its wide frontal area has been set as the subject of research. In order to ensure the reliability of research, the flow analysis surrounding the bus on a flat road where median strip is not installed has been compared with a preceding research while the validity of grid system and interpretation method used in this research have been assured by a qualitative method. In case of the median strip type wind power generator system, because it has been verified that a strong streamwise wind speed (5 m/s) is derived from the contraction effect of flow passage between the bus and the median strip while maintaining a relatively consistent upwind wind speed (1.4 m/s) in vertical direction in the wake area after the bus passes by although the change of wind speed is intense, it was decided as having some possibility of wind power generation. In case of the traffic sign panel type wind power generator system installed at the upper top of highway, because the wind speed of 2 m/s level has been derived for a limited time only at a section equal to the length of the bus and a faint induced wind speed less than 0.5 m/s was shown at other regions, it was decided as having almost no possibility of wind power generation.

• 대한수학교육학회지:학교수학
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• 제17권3호
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• pp.391-405
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• 2015

본 연구에서는 시선추적기(Eye-Tracker)를 활용하여 웹기반 저울 교수학습 프로그램을 이용한 대수적 실험이 학생들의 방정식에 대한 관계적 사고를 형성 시키는지를 학생들의 시선 움직임으로 확인하고자 하였다. 연구문제를 해결하기 위해 전주의 J초등학교 4학년 학생 24명을 대상으로 방정식(a+b+c=d+_) 문제를 3블록, 4가지 형식(12문항)으로 제시하여 시선추적기를 통해 사전사후검사를 실시하고 전략이 뚜렷하지 않은 경우는 면담을 실시하여 인지 과정을 살펴보았다. 수업은 웹기반 수저울 중심으로 등호에 대한 개념 이해와 관계적 사고가 형성되도록 짜여졌다. 그 결과 웹기반 수저울은 받침점을 기준으로 좌우를 비교하도록 하는 과제 해결과정에서 등호에 대한 개념 형성 뿐 아니라, 평형을 이루기 위해 좌우를 살피는 문제 해결과정을 통해 관계적 사고를 형성할 수 있었다.