• Title/Summary/Keyword: Dimensional nature

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China's recent establishment of its ADIZ and its implications for regional security (중국의 방공식별구역(ADIZ) 선포와 역내 안보적 함의)

  • SHIN, Chang-Hoon
    • Strategy21
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    • s.33
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    • pp.148-177
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    • 2014
  • The regional security and stability in Northeast Asia has become more complicated because of a sudden establishment of China's Air Defense Identification Zone (ADIZ) on 23 November 2013. One dimensional conflicts on the territorial sovereignty over the islands between the regional States has developed into the two dimensional conflicts like maritime delimitations among the States concerned since they have all ratified the 1982 United Nations Convention on the Law of the Sea which adopts the 200 nautical mile Exclusive Economic Zone regime. Moreover, due to the notion of the outer limit of the continental shelf, the conflicts have developed into three dimensional ones in order to acquire more natural resources even in the seabed. To make matters worse, such three dimensional conflicts have expanded to the airspace as well. The paper will analyze what implications the sudden declaration of China's ADIZ have for the regional security in Northeast Asia from the perspectives of public international law. To this end, the paper 1) starts with the debates on the legal nature of the ADIZ, 2) identifies the Chinese government's political motives for the establishment of the ADIZ over the East China Sea, 3) assesses the responses of the regional States and the USA to the China's establishment of the ADIZ, and then 4) discuss what implications the overlapped ADIZ of the three key States in the region have for the regional security and stability.

Wall Heat Conduction and Convection Heat Transfer from a Cylinder in Cross Flow (원형 실린더 주위의 전도-대류 열전달)

  • 이상봉;이억수;김시영
    • Journal of Ocean Engineering and Technology
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    • v.15 no.3
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    • pp.1-8
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    • 2001
  • With uniform heat generation within the wall of the cylinder placed in a cross flow, heat flows by conduction in the circumferential direction due to the asymmetric nature of the fluid flow around the perimeter of the cylinder. The circumferential heat flow affects the wall temperature distribution to such an extent that in some cases significantly different results may be obtained for geometrically similar surfaces. In the present investigation, the effects of circumferential wall heat conduction on local convective heat transfer is investigated for the case of forced convection around horizontal cylinder in cross flow of air. Two-dimensional temperature distribution $T_w$/(${\gamma}$,${\theta}$) is presented through the numerical analysis. The one-dimensional and two-dimensional solutions are in good agreement with experimental results of local heat transfer coefficients.

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Development of an Efficient Method to Consider Weld Distortion in Tolerance Analysis (용접변형을 고려한 효율적 공차해석 기법 개발)

  • Yim Hyunjune;Lee Dongyul;Lee Jaeyeol;Kwon Ki Eak;Shin Jong-Gye
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.29 no.10 s.241
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    • pp.1377-1383
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    • 2005
  • A general and efficient methodology has been developed to analyze dimensional variations of an assembly, taking into account of weld distortion. Weld distortion is generally probabilistic because of the random nature of welding parameters such as the welding speed, maximum welding temperature, ambient temperature, etc. The methodology is illustrated through a very simple example of two perpendicular plates fillet-welded to each other. Two steps comprise the methodology: establishment of a weld-distortion database, and tolerance analysis using the database. To establish the database, thermo-elasto-plastic finite element analyses are conducted to compute the weld distortion for all combinations of discrete values of major welding parameters. In the second step of tolerance analysis, the weld distortion retrieved from the database is used in addition to the dimensional tolerances of the parts. As a result of such an analysis, sensitivities of the assembly's dimensional variations to the part tolerances and weld distortion are obtained, which can be help improve the dimensional quality of the assembly.

Study on 3 Dimensional Images Using LED by PLS with No Viewing Zone Forming Optics (LED를 PLS 배열로 사용한 시역 형성 광학계가 없는 3차원 영상의 시역에 대한 연구)

  • Choi, Kyu-Hwan;Kim, Sung-Kyu;Son, Jung-Young
    • Korean Journal of Optics and Photonics
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    • v.19 no.2
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    • pp.116-121
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    • 2008
  • A two dimensional point light source array can replace both the viewing zone forming optics and the back light panel in the contact-type 3 dimensional imaging systems based on LC panels. This replacement can make the system structure of the 3 dimensional imaging systems no different from that of the conventional LCD and can reduce undesirable visual effects caused by the viewing zone forming optics. The problem with the point light source array is the visual quality deterioration of the system due to the non-ideal nature of the array.

Creativity Strategy of 3-Dimensional Illustration -through Printed Media- (3-D 일러스트레이션의 표현 전략 -인쇄매체를 중심으로-)

  • 신용순
    • Archives of design research
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    • v.13 no.2
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    • pp.123-132
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    • 2000
  • Illustration is the work that brings out objective analyzing nature and things in many direction. Its purpose is to deliver the theme in an effective manner to appeal to the proper audience. Especially for 3 dimensional illustration, it is really important because its creativity can be complicated. Also, 3-D illustration are comprised of many materials and skills, so it is vital that 30D illustration is scientific and practical. In the research I am selecting on illustration that can be used in publishing and advertisements. I intend to give a clear understanding of 3-D illustration to my audience. In order to do that I have suggested an illustration must be developed through creativity strategy. Also through suggesting the condition of effective illustration, I want to help to set systematic and practical strategy of 3-D illustration.

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A Study on Hair Art Design Shaped Flower Image (꽃의 이미지를 형상화한 헤어 아트 디자인 연구)

  • Jin, Young-Mi;Kim, Soung-Nam
    • Journal of the Korean Society of Fashion and Beauty
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    • v.5 no.1 s.12
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    • pp.51-55
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    • 2007
  • These days, hair design is recognized as a kind of molding arts which peform expression skill to create personal self as well as practical skill. Recently, the efforts to express hair design sublimating it to art works have continued. For these reasons, this study had purposes as follows; First, it developed creative and original design producing works to shape the flower image that was an important material of hair design. Second, it presented the possibility to express the field of hair design with art. In the flow of age, nature has provided design with unlimited creative motive. Flowers, among various materials, show the nature's change, combination and order and impose diverse symbolic meanings. Therefore, flowers are good materials to express the works. Through the process of decolorizing and dyeing with hair, five works of nature's fragrance, hope, reed flowers, windflower, magnolia blossom had been produced. The results of the process were as follows; First, the transformation of shape through the simple process taking the image of shaping flower as subject matter could be a motive of new hair design art. Second, if the various images of flowers were expressed as hair art with three-dimensional shape, it could be works with value of beauty. Through the process of this study, it was proved that nature could be endless subject matter for art. Therefore, with continuous studies, it can be motive of developing designs in producing work activities of many hair designers. In addition, academic development will be achieved through wide and diverse studies.

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Understanding Medicine as a Multi-dimensional Concept in the Legal Context (의료 개념의 다층적 이해와 법)

  • Kim, Na-Kyoung
    • The Korean Society of Law and Medicine
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    • v.11 no.2
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    • pp.75-112
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    • 2010
  • This article analyses the concept of medicine in the legal context. It is not easy to define the concept of medicine because medical practice has various dimensions and the situation in which the practice is performed has a broad variety. The duty of medical law is to build the boundary of protection in that the nature of medicine would not be distorted by the factors of social systems like industry or governmental authorities. Without understanding the various dimensions - especially the dimension of Humanities and Sociology - of the medicine it is not possible to draw the limit on the performance of medicine appropriately. Concerning the medical practice (especially in the context of the regulation of medical licence), the enacted law (Medical Act) defines the concept just for form's sake and it finally depends on the interpretation of the legal enforcement authorities. Moreover, between the judgments of the courts there exists no coherent principles for the regulation and the interpretation of the Medical Act depends often on the riskiness, the abstract concept, which finally leads the interpretation to depend on the subject of the practice. On the contrary, the development and scientific movement of the technology tends to tighten the range of the medical professionals of medical practice and the perspectives of the medicine. Medical act is actually oriented at the patient's understanding of him- or herself. The above-mentioned tendency of the interpretation and the legal policy could lead the medicine away from its nature.

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A Numerical Certification to Estimated Dimensions of the Observed Land-Sea Breeze Data (해륙풍관측 data의 차원추정 값에 대한 수치적 검증)

  • Lee Hwa-Woon;Kim Yoo-Keun;Lee Young-Gon
    • Journal of Environmental Science International
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    • v.8 no.6
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    • pp.661-667
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    • 1999
  • Estimating dimensions of attractors are the most basic tools to analyze properties of chaotical dynamic systems. In this paper, we estimate correlation dimensions of meteorological variables, such as wind speed (v) and temperature (T) observed in Kimhae International Airport when the land-sea breeze circulation is appeared and find low non-integer values that reflect the deterministic chaos characterizing the dynamics. We compare the results with the correlation dimensions of 2-dimensional model that is calculated by finite element method. Though the correlation dimensions of the calculated wind speed ( v) are less than those of the observed wind speed ( v), we can suggest that the land-sea breeze circulation has not a unique mechanism. The land-sea breeze phenomenon is a complicated dynamics, which is constructed with various scale motions of atmosphere. In further research, we hope to find more accurate dynamics of land-sea breeze through wide observations and using of more sophisticated prediction models.

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Assessment of an Aesthetic Model of Science for NOS Teaching (예비교사의 과학의 본성 지도를 위한 과학의 미학적 모델 측정 방안)

  • Kwon, Sunggi;Nam, Ilkyun
    • Journal of Science Education
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    • v.44 no.2
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    • pp.197-204
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    • 2020
  • In order to teach the nature of science which is one of the goals of science education, the aesthetic model of science was developed into a two-dimensional model through theoretical reviews on the aesthetic aspect of science. We represented 10 kinds of scientific experiments that scientists thought are beautiful in the aesthetic space of science. This paper tried to represent the greatest and famous scientific experiments in the history of science into the aesthetic space of science to find the suitability or usefulness of that model. At the same time, we were able to develop measuring tools as the Likert-scale with pictures of scientific experiments. Through this, we propose various teaching approaches on the nature of science (NOS) based on the aesthetic model of science and the potential for utilization in measuring the effects of the ways of teaching NOS.

Coupling characteristics of localized modes of line defects in two-dimensional photonic crystals (2차원 광자결정 도파로에서 결함모드의 결합특성)

  • Cho, Dae-Hee;Park, Hye-Young;Kee, Chul-Sik;Lim, H.
    • Proceedings of the KIEE Conference
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    • 2003.10a
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    • pp.270-272
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    • 2003
  • We have investigated the coupling characteristics of localized modes of line defect i.e., guided modes, in photonic crystals. The parity of the coupled guided modes is not conserved when the distance between the line defects changes. By comparing the coupling characteristics of localized modes without the oscillatory nature such as cavity modes of metallic Fabry-Parot cavities with those of localized modes in photonic crystals, we confirmed that this parity nonconservation is attributed to the oscillatory nature of the evanescent waves of localized modes in photonic crystals.

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