• 제목/요약/키워드: Imaginary

검색결과 792건 처리시간 0.027초

Study of the Correlation of Plasma Resonance and the Refractive Index to Dielectric Dispersion in the Complex Plane

  • Zhou, Xiao-Yong;Shen, Yan;Hu, Er-Tao;Chen, Jian-Bo;Zhao, Yuan;Sheng, Ming-Yu;Li, Jing;Zheng, Yu-Xiang;Zhao, Hai-Bin;Chen, Liang-Yao;Li, Wei;Jiang, Xun-Ya;Lee, Young-Pak;Lynch, David W.
    • Journal of the Optical Society of Korea
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    • 제17권1호
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    • pp.27-32
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    • 2013
  • Based on the dispersive feature of the dielectric function of noble metals and the wave vector conservation in physics, both the plasma effect and the complex refractive index, which are profoundly correlated to the complex dielectric function and permeability, have been studied and analyzed. The condition to induce a bulk or a surface plasma in the visible region will not be satisfied, and there will be one solution for the real and the imaginary parts of the refractive index, restricting it only to region I of the complex plane. The results given in this work will aid in understanding the properties of light transmission at the metal/dielectric interface as characterized by the law of refraction in nature.

외부 가진력의 주파수에 따른 강제진동시스템의 특성 (Characteristics of Forced Vibration System According to the Frequency of External Exciting Force)

  • 김종도;윤문철
    • 융합정보논문지
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    • 제11권9호
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    • pp.130-137
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    • 2021
  • 주파수를 갖는 외부 가진력에 의하여 강제 진동의 특성을 가진력의 진폭과 주파수에 따라 그 특성을 분석하였다. 변위, 속도 및 가속도를 얻기 위해 수치해석을 수행하여 주파수 응답을 얻었고 특히 주파수 영역에서 시스템 고유진동수와 가진 주파수의 발생 위치를 밝히고자 각각의 FRF의 분석을 하였다. 외부 가진에 의한 진동모델에서 변위, 속도 및 가속도의 거동과 주파수 응답함수에서 고유진동 주파수와 주변의 가진 모드 분포도 파워 스펙트럼과 실수부와 허수부의 FRF 에서 나타났으며 각 모드 특성도 구하였다. 진동의 응답은 가진 신호의 크기와 주파수를 주어 정현파의 가진력으로 외부 가진력을 근사화 하였고 이런 가진력에 의하여 발생하는 모드를 구별할 수 있었다. 상당 질량, 감쇠 및 강성을 변화시켜 수치 분석 후 외부 가진력에 의한 강제 진동 응답 특성을 체계적으로 분석하였다.

승령(GB18) 혈위와 취혈 방법에 대한 고찰 (Review on the Point Location and Locating Method of GB18)

  • 구성태
    • Korean Journal of Acupuncture
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    • 제35권4호
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    • pp.203-209
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    • 2018
  • Objectives : The GB18 belongs to one of the 92 controversial points in the development of WHO standard of acupuncture point location. The number of Chon measurement of GB18 is described differently in the A-B Classic of Acupuncture and Moxibustion (ChimGuGakEulKyung; AB Classic) and the Complete Compendium of Acupuncture and Moxibustion(ChimGuDaeSeong; Complete Compendium). The aim of the study is to review the point location of GB18 and compare the relation of the location of BL7. In addition, I would like to propose new locating method of GB18. Methods : In order to review I examined the expressions of the location of GB18 and the mapping location on the acupuncture chart in the landmark classic acupuncture literatures. Results : In the most literatures, the location of GB18 was described by the distance from the GB17. The distance was 1.5 chon with one exception of 1 chon. The intervals from GB15 to GB18 was 1 chon or 1.5 chon. Although the distance from the anterior hairline is the same as 4 chon, mapping points of GB18 and BL7 on the acupuncture chart were different. Conclusions : Consequently, in the AB Classic, meaning of the location is the actual distance of scalp surface. In the Complete Compendium, however, meaning of the location is the hypothetical distance in the imaginary scalp surface. Therefore, it is safe to find the GB18 on the same level with GV20 on the connecting line of bilateral auricular apexes. The relation of GB18 and BL7 should be reconsidered.

디지털 연기 연구 (Digital Acting Method)

  • 박호영
    • 한국콘텐츠학회논문지
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    • 제18권11호
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    • pp.205-212
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    • 2018
  • 각기 다른 매체에서 요구하는 연기 표현방법의 특성을 이해하고 표현하는 방법을 습득하면 다양한 매체에서 요구하는 연기를 표현하는데 수월하다. 각 매체에서 요구하는 연기 스타일은 매체의 특성에 따라 다르게 표현된다. 특히, 컴퓨터 그래픽 기술을 이용한 디지털 연기는 배우들이 상상의 공간을 가상해서 마치 그 공간에 있는 것처럼 연기로 표현한다. 컴퓨터 그래픽 후반작업을 통해서 최종 스크린에 보일 실제 공간이 완성되고 실제 상황에 따른 이야기를 만들어낸다. 모션 캡쳐를 응용한 디지털 배우의 역할은 영화에서 차지하는 비중이 점점 커지고 있다. 실사 배우와 디지털 캐릭터 간에 자연스러운 상호 리액션 연기 등은 디지털 배우들만 등장하는 애니메이션영화에서는 트랜드로 자리 잡았다. 애니메이션영화에서 실제 배우는 디지털 배우의 캐릭터를 연결시켜주는 주요한 역할을 해낸다. 디지털 배우의 핵심은 개성적 캐릭터 연기를 구현하는 것이다. 트랜스미디어 시대에 디지털 연기는 그 중요성이 날로 높아지고 있다.

공동주택 분양 관리 단계의 BIM 기반 가상현실 적용성 확보를 위한 개선방향 도출에 관한 연구 (A Study on Improvements Direction for Applying BIM-based Virtual Reality of Apartment Sales Phase)

  • 이주연;김택중;최윤기
    • 한국건설관리학회논문집
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    • 제20권2호
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    • pp.86-94
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    • 2019
  • 건설프로젝트가 복잡화, 대형화됨에 따라 사업단계별 참여주체 간 의사소통 및 협업을 위해 BIM기술 도입이 가속화 되고, BIM을 활용한 효율적인 시각화 방식의 도입에 대한 사용자의 요구가 발생하고 있다. 이러한 요구에 따라 BIM과 NUI 융복합 기술의 세계 시장은 지속적으로 성장하고 있지만 국내에서는 전무한 실정이다. 특히 공동주택의 분양단계는 고객의 의사결정을 위해 건축정보를 가장 효과적으로 전달해야 하는 필요가 있다. 본 연구는 공동주택 분양단계 프로세스별 분양마케팅 전략 및 마케팅 사례분석을 통해 공동주택 분양단계의 현황을 분석하고, 분양마케팅 시 건축정보 전달 측면에서 발생하는 문제점에 대해 AHP 기법을 활용하여 중요도 및 우선순위 분석을 진행하였다. 이를 해결하기 위해 BIM 기반의 가상현실 기술을 적용할 수 있는 방안을 제안한다.

인공지능: 그 문화적 상상력과 사회적 시스템 (Artificial Intelligence: Cultural Imagination and Social System)

  • 송영현;이혜경
    • 한국융합학회논문지
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    • 제10권8호
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    • pp.195-203
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    • 2019
  • 이 글은 인공지능과 인간이 함께 사회적 가치를 만들어 가는 작업이 중요하게 대두되는 현재의 시점에서 생활과 연관된 문화와 제도에 대한 패러다임의 전환을 모색해 보는 것을 목적으로 한다. AI와 관련된 현상들이 현대 사회에서 어떻게 작동하는가에 주목하는 접근 방법은 이 연구의 기초를 이룬다. 이에 "AI 현상"을 사회 문화의 일부로 수렴하면서 그 의미를 밝히기 위해 다양한 문헌 자료를 활용, 윤리나 기술평등 같은 가치를 연계시켜 AI의 사회 제도적 면을 짚어 보고자 하였다. 사회의 구성원들이 함께 할 수 있는 AI와 접목된 기술 문화를 추론하는 일도 기능적인 면에서의 기술적 이해 못지않게 중요한 일이다. 따라서 이 연구가 문화적 상상력과 사회적 시스템이 어우러져 만들어내는 새로운 문화, 즉 "인공지능 문화"의 가능성을 제시할 수 있기를 바란다. 그렇기에 이 글은 하나의 시론적인 성격도 더불어 갖는다.

Sensitivity analysis based on complex variables in FEM for linear structures

  • Azqandi, Mojtaba Sheikhi;Hassanzadeh, Mahdi;Arjmand, Mohammad
    • Advances in Computational Design
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    • 제4권1호
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    • pp.15-32
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    • 2019
  • One of the efficient and useful tools to achieve the optimal design of structures is employing the sensitivity analysis in the finite element model. In the numerical optimization process, often the semi-analytical method is used for estimation of derivatives of the objective function with respect to design variables. Numerical methods for calculation of sensitivities are susceptible to the step size in design parameters perturbation and this is one of the great disadvantages of these methods. This article uses complex variables method to calculate the sensitivity analysis and combine it with discrete sensitivity analysis. Finally, it provides a new method to obtain the sensitivity analysis for linear structures. The use of complex variables method for sensitivity analysis has several advantages compared to other numerical methods. Implementing the finite element to calculate first derivatives of sensitivity using this method has no complexity and only requires the change in finite element meshing in the imaginary axis. This means that the real value of coordinates does not change. Second, this method has the lower dependency on the step size. In this research, the process of sensitivity analysis calculation using a finite element model based on complex variables is explained for linear problems, and some examples that have known analytical solution are solved. Results obtained by using the presented method in comparison with exact solution and also finite difference method indicate the excellent efficiency of the proposed method, and it can predict the sustainable and accurate results with the several different step sizes, despite low dependence on step size.

사령수(四靈獸) 민화의 도상해석학적 분석에 의한 패션문화상품 디자인 개발 (Development of Fashion Cultural Product Design Based on the Iconological Analysis of Four Auspicious Animals in Korean Folk Painting)

  • 김지영
    • 패션비즈니스
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    • 제23권2호
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    • pp.18-33
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    • 2019
  • The purpose of this study is to develop fashion cultural products that contain an example of cultural symbolism, which is based on the results of iconological analysis seen on imaginary animals. The method of research was to derive design ideas through a verbal association method, using the technique of mind map as based on the iconological analysis results. In the scarf design, four auspicious animals were used as the main motifs, and the background elements that appeared with each folk painting were used as sub-motifs for each of the four animals. In this case, the Yong was expressed with an image of clouds and flames as sub-motifs, and was strongly represented by the presence of a contrast color combination. In what follows, the Bonghwang was used with the sun and feathers in a stable structure due to its four-way arrangement, and was expressed with its soft light tone. The Shingoo was used with blue and khaki colors of dull and deep tone, and the image of aquatic plants and lotus were used. Finally, with the Kirin was represented by a symmetrical structure as characterized with a dull toned color and square border that provides a sense of stability. The clutch bags were as generally expressed using simple animal motifs, and were composed of a uniform motif and color. The design process used the Illustrator CS6 to perform motifs design. In the end, the process finally developed the actual product of eight scarves and four clutch handbags.

충청수영 영보정의 유식과 시경 공간 연구 (A Study on YuSik and Sikyung Space of Yeongbojeong in Chungcheong-Suyeong)

  • 김명래
    • 대한건축학회논문집:계획계
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    • 제34권8호
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    • pp.77-86
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    • 2018
  • The purpose of this study is to examine the condition of the architectural location and the history of Yeongbojeong and investigate the motivation which formed the YuSik space and the poetical circles of it. And another purpose of the study is to discover how Yeongbojeong, located in a military camp in Western coast, displayed the poetic scenery so to be the poetic summer house among so many Nujeongs in Joseon. Yeongbojeong is currently located in Soseong-ri, Ocheon-myeon, Boryeong City, Chungnam. Yeongbojeong has the biggest size among all the summer houses in the country with 24 architectural rooms. And Yeongbojeong is not only the summer house in which people could simply see its scenery, but beyond the poetic space of Joseon, it was the unique poetic summer house which enables poets and calligraphers to enjoy imaginary freedom. The time range of the study was from the building of Yeongbojeong in 1504 to its demolish in 1901, and its space range was taken focused on the particular scenery which was seen from around Yeongbojeong. To investigate the architectural aspect of Yeongbojeong, the existing records about the summer houses, "OcheonGoonJi" and the landscape paintings etc. were referred. The travel records and poems in the work collection of the famous poets who explored Yeongbojeong were referred to examine the formation of the Yeongbojeong poetical circles. The result of the study shows the process that Yeongbojeong had become the famous national place with scenery and how it became the most visited YuSik space. And this study figured out the full account of Yeongbojeong poetical circles which had been formed by so many poets of the country for 4 hundred years.

미국의 로맨스 소설과 프래그머티즘 철학과의 연속성에 관한 고찰-허먼 멜빌의 『모비딕』을 중심으로 (A Study of the Continuity Between the American Romance Novel and American Pragmatism: A Reading of Herman Melville's Moby-Dick)

  • 황재광
    • 영어영문학
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    • 제58권2호
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    • pp.217-247
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    • 2012
  • This essay attempts to read Melville's Moby-Dick as a prefiguration of American pragmatism, especially Jamesian version of it. Underlying this project is the assumption that the American Romance and James's pragmatism partake in the enduring tradition of American thoughts and imagination. Despite the commonality in their roots, the continuity between these two products of American culture has received few critical assessments. The American Romance has rarely been discussed in terms of American pragmatism in part because critics have tended to narrowly define the latter as a kind of relativistic philosophy equivalent to practical instrumentalism, political realism and romantic utilitarianism. Consequently, they have favored literary works in the realistic tradition for their textual analyses, while eschewing a more imaginative genre like the American Romance. My contention is that James's version of pragmatism is a future oriented pluralism which is unable to dispense with the power of imagination and the talent for seeing unforeseen possibilities inherent in nature and culture. James's pragmatism is in tune with the American Romance in that it savours the attractions of alternative possibilities created by the genre in which the imaginary world is imbued with the actual one. The pragmatic impulse in Moby-Dick finds its finest expression in the words and acts of Ishmael. Through this protean narrator, Melville renders the text of Moby-Dick symbolic, fragmentary and thereby pluralistic in its meaning. With his rhetoric of incompletion and by refraining from totalizing what he experiences, Ishmael shuns finality in truth and entices the reader to join his intellectual journey with a non-foundational notion of truth and meaning in view. Ishmael also envisages pragmatists' beliefs that experience is fluid in nature and the universe is in a constant state of becoming. Yet Ishmael as the narrator of Moby-Dick is more functional than foundational.