• The Journal of Korean Philosophical History
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• no.35
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• pp.385-413
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• 2012

This thesis is a study on the relation of between Xiangshu Zhouyi Theory and mathematics, Zhouyi Theory as the one of the study of Chinese classics, was formed by Zhouyi' Eight Diagrams, the theory of Yinyangwuxing and the knowledge of natural science in Han dynasty. 'Xiangshu' had been regarded as the important concept and theory in the history of Zhouyi Theory From the beginning of Han dynasty to the end of Qing dynasty. At this developing of this Periodical Change, 'Xiangshu' had been endoded in the expression system of mathematics. This thesis considers binary system and surplus nembers, multiple and progression, magic square and circular constant, a proportional expression from Zhouyi Theory point of view. Xiangshu Zhouyi theory got the answer of these questions like the origin of Zhouyi, interpreting Guayao-word and Cosmology by using those expression systems of mathematics. Besides mathematics, Xiangshu Zhouyi theory was also related to astronomy, medicine, etc. Xiangshu Zhouyi theory had kept the pace with the general development of natural science. This thesis from the premise that Xiangshu Zhouyi theory kept the pace with natural science, summing up the mathematical expression system in the history of Zhouyi theory, proves that Xiangshu Zhouyi theory had developed according as the conditions of natural science.

• The Journal of Korean Philosophical History
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• no.28
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• pp.387-415
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• 2010

This article examines Zhu Xi(朱熹)'s theory of I-Qing(易經) present in Yi Xue Qi Meng. Zhu Xi aims to establish a novel Confucian theory of I-Qing, examining the study of I-Qing in Han Dynasity and the Taoist theory of I-Qing. To this end, he embraces Shao Yong(邵雍)'s theory of Xian Tian. Adapting the notion of Xian Tian(先天) as developed by Shao, he completes the Image-Number(象數) Theory of Hetu-Luoshu(河圖洛書). While discussing Hetu Luoshu, Zhu Xi argues that the Image and Number are not merely a form of prognostication, but a medium that reveals the principles of the nature and the sagely ways of mind. In addition, by studing I-Zhuan(易傳) in authoring Yi Xue Qi Meng, Zhu Xi maintains that the notions of Image and Number as he understands were to be approved by Confucius. This leads to the unification of Sho Yong's Tai-Ji(太極), Zou Dun Yi(周 敦頤)'s Tai-Ji, and Tai-Ji in Hetu. Through this work, Zhu Xi attempts to construct a systematic philosophy that straddles ontology and value theory, while identifying Li (理) with Xiang (象) and Shu (數). The Image-Number Theory of Hetu-Luoshu has replaced numerous theories of Image and Number at the time of Zhu Xi. Based on this theory, he restores the method of divination as presented in Xi CI Zhuan(繫辭傳). By successfully applying his theory of Image and Number to interpreting a number of recorded examples of divination during the Spring and Autumn period and the Warring States period, Zhu Xi demonstrates that his theory is not only an abstract metaphysical theory, but also can function as an adaptable method of divination.

• The Journal of Korean Philosophical History
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• no.36
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• pp.75-99
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• 2013

In this treatise, the writer aimed to discuss the points that the Zhouyi("周易") which Dasan(茶山) studied is connected with Xiangshuyixue(象數易學). First of all, Dasan(茶山) reconstructed Shiyi("十翼"). The unique thing is that he included such a new topic, called Shiguachuan("蓍卦傳") - manual of divination signs manual in the Shiyi("十翼"). This Shiguachuan("蓍卦傳") is concerned with the method of divination, and is deeply related to the Xiangshuyixue(象數易學). When it comes to the Zhouyi("周易") which Dasan(茶山) studied, Yilisifa(易理四法). As he discussed Xiang(象), it is connected to the Xiangshuyixue(象數易學). Also, there is a link between the Yilisifa(易理四法) and the Shiguachuan("蓍卦傳"). Dasan(茶山) argued that the Yilisifa(易理四法) is a must in interpreting Zhouyi("周易"). Thus, it can be said that the Zhouyi("周易") which Dasan(茶山) studied is connected with the Xiangshuyixue(象數易學). Next, the writer examined Duyiyaozhi("讀易要旨"), Yilun(易論) and Chunqiu guanzhanbuzhu("春秋官占補註")- literally, annotated collection of divination practice by compiler or editor of annals, etc. Duyiyaozhi("讀易要旨") is related to the Xiangshuyixue(象數易學), too. The writer was able to find out the fact that, in relation to the Divination Signs Manual, the Chunqiuguanzhanbuzhu("春秋官占補註") was also connected with the Xiangshuyixue(象數易學). Through these studies, the writer was able to see that how much Dasan(茶山) had exerted his efforts to define and describe Xiang(象) and Shu(數).

• (The)Study of the Eastern Classic
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• no.43
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• pp.233-258
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• 2011

This paper is about Zhuzi(朱子) writings entitled Yixueqimeng("易學啓蒙"). There are only four research articles on Yixueqimeng("易學啓蒙"), although it had taken important role in the process of formation of Zhuzi(朱子) study of changes, comparing with 30 different kinds of research on his works after this Yixueqimeng("易學啓蒙"). In line with this, the author intends to make this paper as a full-scale research article on Zhuzi(朱子) work - Yixueqimeng("易學啓蒙"). Zhuzi(朱子) exposes the meaning of the Xiangshuyixue(象數易學), to wit, the emblem and numerology of Emblem and Numerology in interpreting Zhouyi("周易") again by accepting Hetu("河圖") and Luoshu("洛書"). When discussing the Zhouyi("周易"), Yiliyixue(義理易學) had drawn supports from Wangbi(王弼) Deyiwangxianglun(得意忘象論). Likewise, Zhuzi(朱子) tried to ruminate upon the meaning of the Hetu("河圖") and Luoshu("洛書") through the Yixueqimeng("易學啓蒙"). As he interprets all things through Hetu("河圖") and Luoshu("洛書"), these two systems of emblem have become essential. Even in Shifa(筮法), he elicited Dayanzhishu(大衍之數) from Hetu("河圖") and Luoshu("洛書") so that he related the divination rule to Hetu("河圖") and Luoshu("洛書"). By doing so, Zhuzi(朱子) concatenates Dayanzhishu(大衍之數) to Hetu("河圖") and Luoshu("洛書") too. Furthermore, by interpreting Yongjiu(用九) and Yongliu(用六), which belong to Qiangua(乾卦) and Kungua(坤卦) as prognostication that will be referred to when all six-line symbols are changed, he had made a great contribution to the history of Zhouyi("周易") study. Zhuzi(朱子) is responsible for a sizable part of the history of Zhouyi("周易") study as much as Wangbi(王弼) and Chengyi(程?). Of course, there are some parts where efforts were made in vain, however, the method to interpret the Zhouyi("周易") have developed day by day owing to the efforts of Zhuzi(朱子).

• The Journal of Korean Philosophical History
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• no.43
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• pp.267-293
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• 2014

This paper is aimed at analyzing the characteristics of Image-Meaning theory focused on image in the early days of the Joseon Dynasty and SongMing period. Zhouyi' theory in the early days of the Joseon Dynasty was constructed on the basis of Zhouyi' theory of SongMing period. The characteristics of Image-Meaning theory in the early days of the Joseon Dynasty can be explained largely by two routes. One is the perspective of critical succession on Zhouyi'theory of focusing on meaning that led Chengyi(程?) and Yangwanli(楊萬裏). As the representative of this route, Gwongeun and Toegye not only asserted Image-meaning theory focused on meaning, but also developed a perspective of taking all the image and meaning. The other is the active succession and creative transformation about Image-Meaning theory of Tushuxue that led Chentuan(陳?) and Shaoyong(邵雍). As the representative of that route, Yulgok and Yeohun explained the schematic diagram of the universe of the universe by using methodology of Tushuxue. Furthermore, they actively succeed Shaoyong' Zhouyi theory to expand Image-Meaning theory focused on number. In addition, Cho, Haoyi(曺好益)described the propositions - "meaning is not out of image area, image equipped with meaning all, then there is no law of limitation in image adopted theory. Those propositions are opposed to Chengyi(程?) and Zhuxi(朱熹)' ZhouYi' theory.

• Journal of the Korean Society of Propulsion Engineers
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• v.20 no.4
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• pp.34-39
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• 2016

Arrhenius kinetic constants, the activation energy and the pre-exponential factor, of energetic material $BKNO_3$ are estimated using Differential Scanning Calorimetry (DSC). Different from the conventional way, the activation energy was estimated more precisely through DSC aging trial, and the consumed fraction by heat was calculated by comparing the integration of heat flow. We suggested the condition of accelerated aging test for the energetic material $BKNO_3$ and reconsidered the meaning of the thermal accelerated aging.

• Journal of the KSME
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• v.32 no.1
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• pp.4-17
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• 1992

이 글에서는 복합적층판의 역학적 특성인 층간분리, 모재균열, 초기파손 후의 거동에 대한 문헌을 간단히 서술하고 그 특성을 살펴 보았다. 이상에서 살펴본 바와 같이 이방성인 층으로 구성된 복합적층 구조의 역학적 특성은 균질인 단일구조와 달리 각층의 재료상수가 달라층과 층 사이의 층간응력이 존재하여 층간분리현상이 발생하지 않도록 섬유방향뿐만 아니라 적층순서를 중요한 설계변수로 고려하여야 한다. 또한 모재균열로 인한 기계적 거동의 변화를 이해하고 초기파손 후의 손상을 고려한 해석을 수행하여 복합적층 구조의 응력해석 및 파손, 강도예측을 한다.

• Proceedings of the Materials Research Society of Korea Conference
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• 1996.05a
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• pp.79-79
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• 1996

• Proceedings of the KIEE Conference
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• 2002.11d
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• pp.103-105
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• 2002

전기-기계 결합시스템에서의 동특성을 정확히 해석하기 위해서는 해석모델의 전기회로 방정식과 운동방정식이 함께 고려되어야 한다. 이때 시스템의 다양한 입력과 기하학적인 구조 등에 대한 등가회로 상수는 시스템의 전반적인 특성에 매우 민감하게 작용하므로 중요하게 고려 되어야한다. 본 논문에서는 전자기시스템의 회로상수를 미리 계산한 다음 이를 기계 역학시스템에 적용하여 다양한 전기적 입력과 외부 부하특성에 대하여 어떻게 동작하는지를 알아보았다. 전자기시스템의 회로상수 추출을 위해 전자장해석은 유한요소법을 이용하였으며 전기회로 방정식과 운동방정식이 함께 고려된 상태 미분방정식은 4차 Runge-Kutta 미분방정식 해법을 이용하여 운동특성을 해석하였다. 계산된 결과는 수학적으로 검증된 미분방정식과 비교하여 검증하였다.

• Journal of the Korean Ceramic Society
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• v.22 no.4
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• pp.15-20
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• 1985

$(Ba_{0.5} Pb_{0.5})_{1-x} Nd_x TiO_3$ 중의 $_x(Nd$의 양)를 변화시키면서 격자상수와 전기전도도를 측정하였다 c축과 a축의 비(c/a) 의 극대값은 실온에 있어서 전기전도도의 극대값과 일치하였다. 이것은 Nd원자의 치환위치와 강유 전성의 변화에 의한 것으로 고찰되었다 Curie 온도이하에서는 Nd 첨가량의 증가에 따라 전기전도도의 활성화에너지가 증가하는 경향을 나타내었다 이것은 입경의 감소에 따른 Spontaneous polarization의 저하가 원인으로 고찰되었다 첨가량의 역학을 입계의 potential barrier의 높이와 관련지어 논하였다.