• 대한수학교육학회지:수학교육학연구
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• 제16권4호
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• pp.297-312
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• 2006

Freudenthal은 수학화 학습지도원리로서 수학의 역사발생 과정을 고려하고 학습자의 상식에서 출발하여 학습자 스스로 지식을 구성하도록 하는 것을 제시하였다. 이 원리를 무리수 지도에 적용한다면 무리수의 존재성을 파악하도록 하는 문제 상황에서 출발해야 한다. 이 연구에서는 Freudenthal의 수학화 학습지도론에 따른 무리수개념 도입 방식을 알아보고, 실제로 Freudenthal의 수학화 학습지도론에 따른 무리수지도 결과 나타나는 학습과정의 특징을 알아보았다. 교수실험에 참여한 학생들은 기존에 학습한 유리수 체계에 대한 반성적 사고를 통하여 무리수의 존재성과 무리수 학습의 필요성을 인식하였으며, 무리수의 역사발생적 배경에 따른 여러 가지 탐구 활동과 측정 활동을 통해 무리수 개념을 발전적으로 이해하면서 학습하였다.

• 디지털융복합연구
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• 제19권1호
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• pp.389-399
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• 2021

본 논문의 연구배경은 플로우 이론을 적용한 u-융합정보시스템이 관광객의 만족도 측정이 부족하기 때문에 연구를 시작하게 되었다. 본 연구의 목적 및 연구 방법은 다음과 같다. 첫째는 플로우 관계정보 표시형식 알고리즘 제안이다. 둘째는 이 알고리즘과 플로우 이론을 접목시켜 콘텐츠 정보품질과 관광객의 성격 유형에 따라 패턴 알고리즘을 생성한 것이다. 본 연구의 기대효과는 플로우 관계정보 표시형식과 관광객의 성격 유형에 따라 패턴 알고리즘을 생성함으로서 u-융합정보시스템의 성공요인을 도출한 것이다. 본 논문의 한계성은 한 지역을 한정적으로 하였으며 데이터의 부족과 소규모 지역으로 객관성이 떨어진다. 추후, 다른 관광지에 제시하는 방법 적용 후, 분석을 통해 효용성을 평가할 필요가 있다. 향후 과제는 전문가 집단의 데이터 보완이 필요하고 여러 지역의 객관성이 보완되어야 할 것이다.

• 한국도서관정보학회지
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• 제14권
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• pp.39-69
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• 1987

The purpose of this research is to analyze the differences between literature (Belles-letters) class in DDC 19 and literature class in KDC 3. The results of the study can be summarized as follows : 1. The section of philosophy and theory of literature in DDC was subdivided according to the properties as including subsection of theory of criticism but KDC didn't subdivide this section. 2. In DDC, the subsections of 'rhetoric in specific languages' and 'rhetoric of specific kinds of composition' in rhetoric section was established and can subdivide according to each languages and subjects. These considerations can be useful as compared with KDC. 3. In DDC, collections or criticism of several literatures in specific forms can be more subdivide according to specific aspects or features dealing with in the collections or criticism by a n.0, pplying Table 3-A when specified more than the literary form. 4. Reviewing a notational rank to be assigned in literatures of specific languages, Latin literature and Classical Greek literature to be ranked in division in DDC was established as subsection in KDC to treat them as literatures of minor languages. 5. The DDC can sometimes a n.0, pply, in literatures of all languages, the notations of Table 3 to be subdivided again as specific kinds of literary forms, but KDC subdivided literary forms as specific kinds of each forms in only Korean, Chinese, Japanese literature. 6. In DDC, even literatures of minor languages are provided with 'the period table for the specific literature' under each literature of specific languages in schedules and these period tables can be a n.0, pplied a n.0, ppropriately, but period numbers in KDC was established in only Korean, Chinese, Japanese literature. 7. The optional use of letter prefixes or special numbers such as 828.99 to distinguish literatures of countries other than the "mother country" which makes the use of period tables feasible, but the KDC can only use to distinguish without the function of dividing a period such as DDC. 8. According to a n.0, pplying Table 3 and 3-A also in literatures of specific languages(810-890), a literature of specific languages, a specific literary form in literature of specific languages and a literature or literary form of specific period, in case of a n.0, pplying 'form divisions 08-09', can subdivide again by a specific aspect or feature dealing with in the works when specified. 9. For grasping the rate of subdividing, after selecting several sample-titles in literary field, they classified by DDC and KDC and gave a definite score in accordance with analytic small subjects. According to the results, the rate of subdividing in literature class of KDC is proved as less 22.8% than DDC. than DDC.

• 한국수학교육학회지시리즈B:순수및응용수학
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• 제27권4호
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• pp.171-186
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• 2020

Long back in 1972, it was shown that the sum of the squares of vertex degrees and the sum of cubes of vertex degrees of a molecular graph both have large correlations with total 𝜋-electron energy of the molecule. Later on, the sum of squares of vertex degrees was named as first Zagreb index and became one of the most studied molecular graph parameter in the field of chemical graph theory. Whereas, the other sum remained almost unnoticed until recently except for a few occasions. Thus it got the name "forgotten" index or F-index. This paper investigates extremal graphs with respect to F-index among the class of bicyclic graphs with n vertices and k pendant vertices, 0 ≤ k ≤ n - 4. As consequences, we obtain the bicyclic graphs with largest and smallest F-indices.

• 한국언어정보학회:학술대회논문집
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• 한국언어정보학회 2002년도 Language, Information, and Computation Proceedings of The 16th Pacific Asia Conference
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• pp.92-102
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• 2002

The issue of adjuncts has long been a neglected field of linguistic study whether it be syntactic or semantic. It is only in Pustejovsky (1995) that we find a brief mention of adjuncts. In addition to what the author calls true arguments, default arguments, and shadow arguments, he sets up a class of true adjuncts citing the following sentence, Mary drove down to new York on Tuesday. We will take up a small lexical item sugiru in Japanese, and we will argue that we should posit the notion of implicit adjuncts in describing the properties with the small Japanese lexical item sugiru. Throughout the discussions that follow we will demonstrate how the notion is independently motivated irrespective of what linguistic theory we are going to adopt.

• Structural Engineering and Mechanics
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• 제39권4호
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• pp.579-598
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• 2011

The present work mainly reports a significant development of a novel efficient meshfree method for vibration and buckling analysis of orthotropic plates. The plate theory with orthotropic materials is followed the Kirchhoff''s assumption in which the only deflection is field variable and approximated by the moving Kriging interpolation approach, a new technique used for constructing the shape functions. The moving Kriging technique holds the Kronecker delta property, thus it makes the method efficiently in imposing the essential boundary conditions and no special techniques are required. Assessment of numerical results is to accurately illustrate the applicability and the effectiveness of the proposed method in the class of eigenvalue problems.

• 전자공학회논문지B
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• 제29B권9호
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• pp.37-49
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• 1992

The standard definition of computational vision is a set of inverse problems of recovering surfaces from images. Thus the common characteristics of the most early vision problems are ill-posed. The main idea for solving ill-posed problems is to restrict the class of admissible solutions by introducing suitable a priori knowledge. Standard regurarization methods lead to satisfactory solutions of early vision problems but cannot deal effectively and directly with a few general problems, such as discontinuity and fusion of information from multiple modules. In this paper, we discuss limitations of standard regularization theory and present new stochastic method. We will outline a rigorous approach to overcome part of ill-posedness of image restoration, edge detection, and stereo vision problems, based on Bayes estimation and MRF(Markov random field) model, that effectively deals with the problems. This result makes one hope that this framework could be useful in the solution of other vision problems.

• Journal of Information Science Theory and Practice
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• 제11권1호
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• pp.79-88
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• 2023

This study aimed to develop an ontology for Thai country songs by using the seven steps of an ontology development process. Hozo-Ontology Editor software and Ontology Application Management Framework were tools used in this study. Nine classes of ontology were identified: song, singer, emotion, author, language used, language type, song style, original, and content, and it was found that the song class had a relationship with all of the other classes. The developed ontology was evaluated by seeking opinions from experts in the field of Thai country songs, who agreed that the ontology was highly effective. Additionally, the evaluation employed the knowledge retrieval concept, and the precision, recall, and overall effectiveness were measured, with a precision of 92.59%, a recall of 86.21%, and an overall effectiveness (F-measure) of 89.28%. These results indicate that the developed ontology is highly effective in describing the scope of knowledge of Thai country songs.

• Korean Journal of Mathematics
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• 제6권2호
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• pp.221-229
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• 1998

Let $k$ be a real abelian field and $k_{\infty}$ be its $\mathbb{Z}_p$-extension for an odd prime $p$. Let $A_n$ be the Sylow $p$-subgroup of the ideal class group of $k_n$, the $nth$ layer of the $\mathbb{Z}_p$-extension. By using the main conjecture of Iwasawa theory, we have the following: If $p$ does not divide $\prod_{{{\chi}{\in}\hat{\Delta}_k},{\chi}{\neq}1}B_{1,{\chi}{\omega}^{-1}$, then $A_n$ = {0} for all $n{\geq}0$, where ${\Delta}_k=Gal(k/\mathbb{Q})$ and ${\omega}$ is the Teichm$\ddot{u}$ller character for $p$. The converse of this statement does not hold in general. However, we have the following when $k$ is of prime conductor $q$: Let $q$ be an odd prime different from $p$. and let $k$ be a real subfield of $\mathbb{Q}({\zeta}_q)$. If $p{\mid}{\prod}_{{\chi}{\in}\hat{\Delta}_{k,p},{\chi}{\neq}1}B_{1,{\chi}{\omega}}-1$, then $A_n{\neq}\{0\}$ for all $n{\geq}1$, where ${\Delta}_{k,p}$ is the $Gal(k_{(p)}/\mathbb{Q})$ and $k_{(p)}$ is the decomposition field of $k$ for $p$.

• 한국콘텐츠학회논문지
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• 제17권4호
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• pp.25-35
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• 2017

본 연구에서는 한국의 유아 교사들이 창의성 교육에 관한 개념을 어떻게 인식하고 있는지 그 과정에 관하여 탐색하는 것을 목적으로 질적 연구를 수행하였다. 면접대상자는 서울 소재 유치원에 재직하고 있는 현직교사 4명이며, 반구조화된 심층면접을 통하여 면접 자료를 수집하였다. 수집된 자료는 질적 연구방법 중 木下(기노시다)의 수정근거이론(Modified Grounded Theory Approach)을 채택하여 분석하였다. 자료 분석 결과, 유아교육 분야의 전문가 집단이라 할 수 있는 유아 교사들은 독특한 사고, 풍부한 표현력 등이 창의성교육의 핵심개념이라고 파악하고 있었다. 이와 같은 개념은 주로 아이들과의 직접적인 만남이 이루어지는 학습, 누리과정 교수 등을 통해서 창의성 개념을 형성하는 것으로 나타났다. 이보다 앞서 수행된 초 중등 교사들을 대상으로 창의성 개념을 탐색한 선행연구와 비교해 볼 때, 유아 교사들은 창의성 교육에 관하여 상당히 일치된 핵심개념을 서로 공유하고 있다는 것이 본 연구를 통해 밝혀졌다. 본 연구결과는 유아교육 분야에서는 비교적 창의성 교육에 관한 개념이 일관성 있게 받아들여지고 있으며, 교육현장에서도 유아들에게 개념 및 교수방법 등이 양호하게 잘 전달되고 있음을 의미한다.