• Title/Summary/Keyword: NATURE

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Outer Shock Interaction with Progenitor Winds in Young Core-Collapse SNRs

  • Lee, Jae-Jun
    • The Bulletin of The Korean Astronomical Society
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    • v.37 no.1
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    • pp.72.1-72.1
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    • 2012
  • Studying the environments in which core-collapse supernovae (SNe) explode and evolve is essential to establish the nature of the mass loss and the explosion of the progenitor star. The spatial structure of the outer shock in young core-collapse SNR provides an excellent opportunity to study the nature of the medium into which the remnant has been expanding. I will review studies of the outer shocks in young Galactic SNRs using Chandra X-ray observations and discuss the nature of the winds and the progenitor stars.

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The Nature of Management by Policy-Development and Its Application Problems among Korean Industries (방침관리의 본질과 적용상의 문제점 -우리나라 기업의 적용실태를 중심으로-)

  • 송문익
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.10 no.16
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    • pp.53-61
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    • 1987
  • This study is on the Management by Policy-Deployment(MBP) a Japanese-devised management system which recently call a widespread awareness and applications among major Korean Industries. The principal nature of MBP was compared with Management by Objectives(MBO) as these two systems share similarities in basic nature. Then the major application problems of MBP encountered by the practicing managers were encountered and examined In relation to the Japanese firms organizational culture.

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The Study of Private and Public Nature in Household Work (가사노동의 사적 특성과 공적 특성에 대한 연구)

  • 문숙재
    • Journal of the Korean Home Economics Association
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    • v.34 no.3
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    • pp.199-210
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    • 1996
  • This study is planned to investigate a discussion of private and public nature in household realm. For this purpose, first of all, study precedent concerning the household work and the private and public nature is reviewed. Second, the origin on the privacy of household work and it's relationship of the public part are investigated. Third, it is implicated that through the politicization of household work, it is enable to establish new insight of household work in the family policy.

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Chaotic Analysis of Partial Discharge (CAPD) - A novel approach to identify the nature of PD source (Chaos 이론을 이용한 부분방전 신호분석(CAPD) - 결함 종류 판별을 위한 새로운 접근 방법)

  • 임윤석;구자윤;김성홍;이전선;최재옥;윤정훈;마지훈
    • Proceedings of the IEEK Conference
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    • 2001.09a
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    • pp.975-979
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    • 2001
  • In connection with the monitoring of the insulation degradation of large power apparatus in order to predict their expected service failures, a statistical treatment, such as phase resolved partial discharge analysis (PRPDA), has been established for the on-line monitoring system during the past decades. However, this method has shown some inconveniences to identify the nature of the PD source in power apparatus. In this regard, a novel approach based on the chaotic analysis (CAPD) is proposed describing the fundamental ideas, outcomes and different viewpoints from the conventional PRPDA. As a model for the possible defects causing sudden failures in service, three types of specimen are prepared. And partial discharge signals, originated from those samples, are measured and analyzed by means of CAPD. Throughout this work, it seems that the correlation between the consecutive PD pulses, depending on the nature of PD, could be clarified by CAPD. Thereffre, it could be considered that the nature of PD source can be identified more distinctively when the CAPD is combined with PRPDA.

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Nature-Inspired high sensitivity tactile sensor technology (자연모사 고감도 촉각센서 기술)

  • Kim, Tae Wi;Lee, Eun Han;Kang, Daeshik
    • Vacuum Magazine
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    • v.4 no.3
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    • pp.6-11
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    • 2017
  • The tactile sensor of the future robot is becoming a necessity as a sensory organ which can communicate with the person most directly. Recently, the Nature-inspired technology has provided a new direction for the development of these tactile sensors. Here, we review three different nature-inspired tactile sensory system; high sensitivity pressure sensor inspired by beetle wings, highly sensitive strain sensor inspired by the spider's sensory organs, Tactile sensor inspired by human fingertip. These nature-inspired tactile sensors are expected to provide a breakthrough that not only can sensitively measure the pressure, but also delicately recognize the softness and texture of the material just like human.

Effects of Metallic Parameters for Distribution of Fatigue Crack Growth Rate - Dependence of Grain Size -; (피로크랙진전속도의 분포에 대한 금속학적 인자의 영향 - 결정입자 의존성 -)

  • Yoon, Han-Yong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.20 no.7
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    • pp.2141-2147
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    • 1996
  • The strength of material is scattered owing to the inhomogenity of microstructure, in spite of the same material. Therefore, in order to design the mechanical structure with the reliability engineering, it is important to grasp the statistical nature of material strength. In this paper, effects of grain sezes for the statistical nature of the fatigue crack growth was discussed. And the statistical nature of mechanical properties was compared with the statistical nature of the fatigue crack growth rate.

Development of a Rural Amenity Values Assessment Model by Analytic Hierarchy Process (AHP 기법에 의한 농촌 어메니티 가치 평가 모델 개발)

  • Bae, Seung-Jong;Chung, Ha-Woo
    • Journal of The Korean Society of Agricultural Engineers
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    • v.49 no.5
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    • pp.33-44
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    • 2007
  • This study proposed a Rural Amenity Values Assessment Model (RAVAM) to evaluate the rural amenity resources based on the Myun as a spatial unit. In RAVAM, 61 rural amenity resources were classified into almost intact nature resources, interaction between nature and man resources, man-made resources, respectively. Especially, Rural Scenic Value Index (RSVI) was developed to quantify rural scenic views as a rural amenity resource. RSVI was utilized in evaluation process of rural amenity resources. The weighing factors for the amenity resources were evaluated from the step wise pair-comparison results of 11 specialists by Analytic Hierarchy Process(AHP). In the results, the weighting values of almost intact nature resources, interaction between nature and man resources, man-made resources were 496, 323 and 181, respectively, among total value being 1,000.

A study of Crown ornament of Ancient Egypt (고대 이집트 관식에 관한 고찰)

  • Park, Ok-Lyun;Yeo, Sang-Mee
    • Korean Journal of Human Ecology
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    • v.10 no.2
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    • pp.179-188
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    • 2001
  • The purpose of this study was to research the symbolic of Ancient Egyptian Crown ornament. The results of this study were summarized as follows. Ancient Egyptians expressed the authority of king and nature worship to the crown ornament. The volume and scale of shape symbolized the authority of king and the nature worship. The brillant and plentiful of colors symbolized the strong1y authority of king. The numbers of patterns symbolized the authority of king and the nature worship.

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Effects of the Nature Game Experience Learning on Schoolchild's Environmental Sensitivity Change in Jeju Gotjawal Forest (제주 곶자왈 숲 자연 놀이 체험 학습이 초등학생의 환경 감수성 변화에 미치는 영향)

  • Ko, Sung-Woo;Hong, Seung-Ho
    • Hwankyungkyoyuk
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    • v.23 no.3
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    • pp.97-114
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    • 2010
  • The aims of this study are to develop and apply a Nature Game program for the ecological experience learning in Jeju Gotjawal forest and analyze the environmental sensitivity change of the students. The results obtained in 4th graders of A elementary school of Seogwipo-city are as follows: It was found that attention, susceptibility and practice will of environment protection for forest environment of the experimental class were significantly higher than those of the comparison class. And it was found that interest and curiosity into forest environment were also elevated in the results of the qualitative evaluation, suggesting that we could get the effect of developed Nature Game program on ecological experience learning. If various ecological experience learning programs considering the regional-specific characteristics are developed to cause students' interest and curiosity, students would come to participate in the protection activity of environment aggressively a little more.

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The Convergence of Oriental Medicine and Western Medicine on the Harmony of Eum and Yang (음양조화원리(陰陽調和原理)를 통한 동서의학(東西醫學) 회통(會通))

  • Park, Ki-Soo;Lee, Si-Hyeong
    • Journal of the Korean Institute of Oriental Medical Informatics
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    • v.18 no.1
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    • pp.116-137
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    • 2012
  • The topic of this study is to ask and answer about 'What matters most in medicine'. And the purpose of this study is to establish paradigm which guarantee 'the original principles of science in medicine' and 'the safety of human life in medicine'. The organized characteristics of this study is as follows. 1. 'The harmony of nature (heaven, earth and human)' is the base of medicine. Because medicine control life directly and all life is 'the son of nature'. 2. 'The harmony of Eum and Yang' is the essential power of universe and the key of metabolism of all life including human, animals and plants. Because 'the nature of universe' and all 'Life field' is 'electro-magnetic field'. 3. The Convergence of Oriental medicine and Western medicine orients 'the harmony of Eum and Yang'.

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