• Korean Journal of Mathematics
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• 제5권1호
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• pp.9-16
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• 1997

In this paper, we construct new classes from the idea of [6, Theorem 2.1] and show that the property of operators belonging to the classes is inherited by certain dilations. And we also prove that the existence of common noncyclic vectors for certain families is equivalent to the existence of infinite dimensional common semi-invariant subspace of operators.

• 철학연구
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• 제141권
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• pp.1-42
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• 2017

본 논문은 데카르트의 "성찰"(Meditations)을 중심으로 신 존재증명을 논증한다. 데카르트의 신 존재증명 방식은 공식적으로 전통적인 신앙이 아니라 넌크리스천을 위해 기하학적 방식으로 이성에 호소하였다는 점을 분석적 방식(대부분 Georges Dicker의 방식)을 사용해서 밝힐 것이다. 그의 신 존재 논증은 "성찰 III"에 나타난 첫 번째, 두 번째 증명과 "성찰 V"의 세 번째 증명이다. 데카르트는 "성찰 III"에서 신의 관념은 내 안에 있지만 그 관념의 원인자는 신이며(첫 번째 논증), 이에 근거하여 신의 관념을 가지고 있는 사유하는 자아의 존재를 신만이 원인자(두 번째 논증)라는 우주론적 논증(Cosmological argument)을 제시한다. 이를 위해 그는 먼저 관념들을 형상적 실재성(formal reality)과는 다른 표상적 실재성(representative reality)의 차등에 따라 위계가 정해진다는 것을 진술하고, 이 실재성의 차등이 결과와 원인으로 동일하게 적용되어 최초의 관념인 신에게로 나아가며 나의 존재의 원인(나는 누구로부터 나왔는가?)도 신이 될 수밖에 없다는 것을 논증한다. 세 번째 논증인 존재론적 논증(Ontological argument)에서 필자는 최고의 완전한 존재자인 신이 모양이나 수를 증명하는 것과 수학의 확실성 못지않게 신의 존재(완전성)가 그의 본질에 포함되어 있다는 사실이 명석 판명하다는 데카르트의 논증을 살핀다. 이를 통해 필자는 그의 신 존재 증명의 의도와 의의가 신은 회의의 대상이 될 수 없는 '나는 생각한다 그러므로 존재한다'(cogito ergo sum)를 보증하는 것 즉, 이성을 만족시키고 충족시킬 수 있는 것은 신의 존재 밖에 없었기 때문에 신이 요구되었으며, 인간 이성의 명석 판명한 지각이 참된 인식일 수 있다는 것을 보증해주는 궁극적 근거의 확보였다는 것을 고찰할 것이다. 더 나아가 그의 증명이 전통적인 노선(안셀무스, 토마스 아퀴나스)에 있었지만 그럼에도 불구하고 신 존재증명은 전통과는 다른 의미의 증명이며 전적으로 다른 의미의 신존재였다(Jean-Luc Marion)는 것을 비판적으로 검토할 것이다.

• 한국수학교육학회:학술대회논문집
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• 한국수학교육학회 2010년도 제44회 전국수학교육연구대회
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• pp.261-267
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• 2010

Both history of mathematics and education of mathematics is old subject. The question arises wether can these two important subjects can help each other or not. Unfortunately this idea made mathematics society into two groups; one has idea that history of mathematics can help education of mathematics and other group has idea that not only history of mathematics can not help education of mathematics but also it makes some confusion. In this article the author is going to do some comparison and take some conclusion that history of mathematics can make education of mathematics so active and interesting.

• 한국의류학회지
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• 제33권7호
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• pp.1128-1139
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• 2009

This study is on the works of Hussein Chalayan that is an expression of his idea and abstract concepts such as culture, history, time, space, nature, and humanity. The perspective of E. H. Gombrich is studied to understand the works of Chalayan who is the one of representative fashion designers in the present age. The 'schema and correction' process of E. H. Gombrich provides a suitable interpretation frame that considers the variety of works of art and the deconstruction of genre in the after 20th century. Hussein Chalayan attempts to combine clothes with other territories to show the spirit as materiality. He expresses the clothes that speaks the form of nature, symbolizes the combination of culture, visualizes time and space, and investigates the existence of human beings. Hussein Chalayan poses an endless question about the existence of human beings. He has put a question about the relationship of the human being and time, space, history, and nature. His trial to visualize the metaphysical conception of 'ego' and 'self' through his works makes him the representative designer of the 21st century.

• Kyungpook Mathematical Journal
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• 제29권2호
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• pp.141-147
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• 1989

The existence and uniqueness of solutions of nonlinear Volterra-Fred-holm integral equations of the more general type are investigated. The main tool employed in our analysis is the method of successive approximation based on the general idea of T.Wazewski.

• 농촌계획
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• 제9권4호
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• pp.19-34
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• 2003

The purpose of this study is to investigate an epistemological recognition of rural society. This study suggests an epistemological reorientation for rural society circumscribing diverse theoretical thoughts as well as empirical evidences. Traditional theoretical perspectives in urban-rural dichotomy envisioned by modernistic idea have regarded rural society as a premodern and underdeveloped society. The perspectives also have regarded city as a symbol of civilization and development. These perspectives thought of the function of rural society as a periphery that can survive as a back-up for urban-oriented prosperity. This study shows that these idea have been concentrated on agricultural expansionism and productivism which do not function in the post-modem societies my longer. The present study argues that these modernistic idea give little understanding of implicit value of rural society. Owing to the functional change of rural society which is quite omnipresent in the 21'st centuries in the world, the present study argues that the value of rural society should work even in the market society that has traditionally been regarded as an working-mechanism in urban society. The present study drives a new insight showing that rural renaissance is an explicit existence instead of a phenomenal one.

• 대한수학회지
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• 제51권4호
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• pp.703-719
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• 2014

This paper is concerned with the traveling wave solutions of nonlocal dispersal models with nonlocal delays. The existence of traveling wave solutions is investigated by the upper and lower solutions, and the asymptotic behavior of traveling wave solutions is studied by the idea of contracting rectangles. To illustrate these results, a delayed competition model is considered by presenting the existence and nonexistence of traveling wave solutions, which completes and improves some known results. In particular, our conclusions can deal with the traveling wave solutions of evolutionary systems which admit large time delays reflecting intraspecific competition in population dynamics and leading to the failure of comparison principle in literature.

• Communications for Statistical Applications and Methods
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• 제14권2호
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• pp.443-457
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• 2007

This paper deals with the problem of testing the existence of change in mean and estimating the change-point using nonparametric bootstrap technique. A test statistic using Gombay and Horvath (1990)'s functional form is applied to derive a test statistic and nonparametric change-point estimator with bootstrapping idea. Achieved significance level of the test is calculated for the proposed test to show the evidence against the null hypothesis. MSE and percentiles of the bootstrap change-point estimators are given to show the distribution of the proposed estimator in simulation.

• 대순사상논총
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• 제26집
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• pp.143-182
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• 2016

The Qi(氣) concept in the Orient is the important concept which forms the world-view and thinking structure of the Oriental. The idea of Qi unfolds two ways. The first is the cosmogony that is the theory explaining the creation and change of universe through the change of Qi. The second is the preservation theory that think human body is full of Qi and we can be the immortal by raising Qi inside human body. The canon of Daesoonjinrihoe(大巡眞理會), Jeon-gyung(典經) also says about Qi many times especially in the doctrines about the object of belief and Cheonjigongsalon(天地公事論). This paper is willing to systematize the discussion of Qi in Daesoon(大巡) thought through researching Sangjeguan (上帝觀) and Cheonjigongsalon. The object of religious faith in Daesoonjinrihoe is Gucheon(九天)-yeungwon(應元)-noisung(雷聲)-bohwa(普化)-cheonjon(天尊)-gangsung(姜聖)-sangje(上帝) and Won(元) concept in the explanation of this divinity is deeply related to Wonqi(元氣) thought of the Oriental traditional Qi idea. And the theory of Qi(Qilon, 氣論) in Sangjeguan is related to electricity and the idea that the supreme God governs all things by electricity is the very original interpretation only found in Daesoon thought. The Qilon in Cheonjigongsalon is based on the Qilon of traditional thought that sees Qi is the element of all things and all thing are formed by the change of Qi. And the unique feature of the Qilon is saying that the supreme God, Cheungsan(甑山) operates Qi of universe and arouses the change of Qi. That is to say, God Cheungsan saved the world and all living beings by eliminating and giving and changing and moving and gathering and combining Qi. The characteristics of Qilon in Cheonjigongsalon is that the transcendental existence having human body has the control of the change of Qi in the universe. In conclusion, Qilon of Dasesoon thought tells that Gucheon-Sangje Chengsan governs all things by electricity and he fixed the old world and opened the new world like paradise by conducting the change of Qi.

• 대한한의학원전학회지
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• 제28권1호
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• pp.195-206
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• 2015

Objectives : Before Liver, Heart, Spleen, Lung, Kidney was widely accepted as Five Viscera, there had been several former types of Viscera system in pre-Western Han era. Above them, the Five Viscera system consisted of Liver, Heart, Stomach, Lung, Kidney was not yet hardly studied. So we tried to prove it's existence and tried to find it's historical context. Material and Methods : Via preceding research analysis, 6 books were selected as research material, and some other pre-Eastern Han dynasty classics were also analyzed. Results : We found direct evidence of above Five Viscera system in Zhuixingxun (墜形訓) in Huainanzi (淮南子), Wusemaizhen (五色脈診), and Western Han dynasty lacquer figure with meridian-points (excavated in Laoguanshan, Chengdu, China). Other clues showing existence of above Five Viscera system was also found in Yinyangshiyimaijiujing (陰陽十一脈灸經), Pianquecanggongliechuan (扁鵲倉公列傳). The rising of above Five Viscera system was related to physiological viewpoint transition of viscera in Western Han dynasty. Conclusions : In Western Han dynasty there was another Viscera System consisted of Liver, Heart, Stomach, Lung, Kidney.