• 제목/요약/키워드: Visualization Method

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An Experimental Study on Flow Structure inside a Display Cooler Using PIV Techniques (PIV기법을 이용한 전시용 냉장기의 내부 유동장 측정)

  • Park, Cheol-Woo;Baek, In-Je
    • Journal of the Korean Society of Visualization
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    • v.5 no.2
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    • pp.48-55
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    • 2007
  • Flow structure inside a refrigerating compartment of a scale-down display cooler model was investigated experimentally by using PIV (particle image velocimetry) method, a reliable velocity field measurement technique, in the present study. In addition, we also carried out flow visualization regarding flow structure and particle movement inside a display cooler by using a tracer method. As a result, the mean velocity field measurement shows a large scale vortical flow structure inside a refrigerating compartment due to strong entrainment flow, going through a base plate open gaps.

A Study on Volume Visualization Method of Three-Dimensional Ultrasonic Medical Image (삼차원 초음파 의료 영상의 입체 묘사 기법 연구)

  • Choi, J.P.;Ha, M.H.;Ra, J.B.
    • Proceedings of the KOSOMBE Conference
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    • v.1995 no.05
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    • pp.45-48
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    • 1995
  • Visualization of three dimensional medical images has been studied in many ways. For CT and MRI data, 3D rendering schemes are commercially available and widly used. However visualization of ultrasonic 3D data is not popular yet, even though its potentional in medical diagnosis seems very high. In this paper we try to visualize 3D ultrasonic data. The basic method is adopted from the volume rendering technique. Based on the characteristics of the ultrasonic images, 3D visualization algorithm is developed and applied for the 3D image set of a dog heart.

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A Study on the 3-D Digital Modelling of the Sea Bottom Topography (3차원 해저지형 수치모델에 관한 연구)

  • 양승윤;김정훈;김병준;김경섭
    • Journal of the Korea Institute of Military Science and Technology
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    • v.5 no.2
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    • pp.50-61
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    • 2002
  • In this study, 3-dimensional virtual visualization was performed for a rapid and accurate analysis of sea bottom topography, The visualization was done through the extracted data using the developed program and the generated data using the gridding method. The data extraction program was developed with AutoLISP programming language and this program was able to extract the needed sample bathymetry data from the electronic sea chart systematically as well as effectively. The gridded bathymetry data were generated by the interpolation or extrapolation method from the spatially-irregular sample data. As the result of realization for the 3-dimensional virtual visualization, it was shown a proper feasibility in the analysis of the sea bottom topography to determine the route of submarine cable burial.

Visualization of Micro-Scale Plasma Generated in a Semiconductor Bridge (SCB) (반도체브리지로부터 발생되는 마이크로 플라스마 가시화)

  • Kim Jong-Uk;Park Chong-Ook;Kim Sun-Hwan;Lee Jung-Bok
    • 한국가시화정보학회:학술대회논문집
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    • 2002.11a
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    • pp.53-54
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    • 2002
  • Plasma ignition method has been applied in various fields particularly to the rocket propulsion, pyrotechnics, explosives, and to the automotive air-bag system. Ignition method for those applications should be safe and also operate reliably in hostile environments such as; electromagnetic noise, drift voltage, electrostatic background and so on. In the present study, a semiconductor bridge (SCB) plasma ignition device was fabricated and its plasma characteristics including the propagation speed of the plasma, plasma size, and plasma temperature were investigated with the aid of the visualization of micro scale plasma $(i.e.,\;\leq\;350\;{\mu}m)$, which generated from a Micro-Electro-Mechanical poly-silicon semiconductor bridge (SCB).

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AC-Electroosmotic Flows-Fundamental Mechanism and Kinematic Aspects (교류 전기삼투유동 - 근본 메커니즘과 운동학적 양상)

  • Suh, Yonk-Kweon
    • Journal of the Korean Society of Visualization
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    • v.6 no.1
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    • pp.3-16
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    • 2008
  • Controlling fluid flows in micro scales is a non-trivial issue among those who are involved in designing lab-on-chips. Pumping and mixing by using electrokinetic principles has been popular in that the method requires a few parts and it is easy to control. This paper explains the basic mechanism of the electroosmotic flows caused by AC together with presenting some numerical results. In particular, the fundamental, physical idea involved in the mechanism will be illustrated in terms of the kinematic aspect. Since the electroosmotic flows are mainly driven by the motion of ions, we also demonstrate the ion motions by using the numerical-visualization method.

Exploring a Teaching Method of Limits of Functions with Embodied Visualization of CAS Graphing Calculators (CAS 그래핑 계산기의 임베디드 시각화를 통한 함수의 극한 지도 방안 탐색)

  • Cho, Cheong-Soo
    • Communications of Mathematical Education
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    • v.25 no.1
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    • pp.63-78
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    • 2011
  • The purpose of this study is to explore a teaching method of limits of functions with more intuitive and visual of CAS graphing calculators rather than with the rigorous ${\epsilon}-{\delta}$ method. Texas Instruments Voyage200 CAS graphing calculators are used for studying the possibility of the use of technology in calculus course. For this, various related theoretical constructs are reviewed: concept image, concept definition, cognitive conflict, the use of visualization of technology for calculus concepts, the theory of APOS, and local straightness. Based on such theoretical constructs this study suggests a teaching method of limits of functions with embodied visualization of CAS graphing calculators.

An Efficient 3D Visualization Method of AUV Motion Using Interpolation of Position Data (보간법을 이용한 무인잠수정 3차원 운동의 효율적인 가시화 기법)

  • Lee, Hee-Suk;Jun, Bong-Huan;Kim, Ki-Hun;Kim, Sang-Bong
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • 2006.11a
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    • pp.327-330
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    • 2006
  • With the increasing requirements for the survey and development of the ocean, the demands on the of AUV(Autonomous Underwater Vehicle) technologies have been increased. Reconstruction and replay of the AUV motion on the basis of the data stored during the execution of mission, can help the development of control strategies for AUVs such as mission planning and control algorithms. While an AUV cruises for her mission, her attitude and position data are is recorded. The data can be used for visualization of the motion in off-line. However, because most of the position data gathered from acoustic sensors have long time-interval and include intermittent faulty signal, the replayed motion by the graphic simulator can not demonstrate the motion as a smooth movie. In this paper, interpolation methods are surveyed to reconstruct the AUV position data. Then, an efficient 3D visualization method for AUV motion using the interpolation method is proposed. Simulation results arc also included to verify the proposed method.

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A Method of Visualization and Fast Estimation of Parameter in Continuous Time Signal (연속적인 신호에서 고속 파라미터 추정과 시각화 방법)

  • Kim, Heon-Tea;Shim, Kwan-Sik;Nam, Hea-Kon;Choi, Joon-Ho;Lim, Yeong-Chul;Kim, Eui-Sun
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.24 no.8
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    • pp.84-93
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    • 2010
  • This paper describes a method of visualization and fast estimation of parameter in continuous time signal. The parameter estimation method of this paper directly estimate the parameters on the basis of the discrete Fourier transform. Also, this paper present to efficient visualization method of dominant parameters obtained in continuous time signal. The proposed methods are applied to test functions with three dominant modes. The results show that the proposed methods are highly applicable to parameter estimation and visualization in continuous time signal.

A Study of Classical Makeup of the Korean Age by Using Language Visualization (언어 시각화를 통한 한국의 시대별 고전화장 연구)

  • Barng, Kee-Jung
    • Journal of Fashion Business
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    • v.22 no.1
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    • pp.114-123
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    • 2018
  • The purpose of this study is to investigate the visual elements for effectively conveying the make-up method of the Korean history. We will do basic research on language visualization through visual poetry by using a make-up method as a visual expression element. Our research methods consisted of a related literature research, an internet search, and case study methods. The make-up methods of Korean classical make-up through visual poetry consisted of a through literature review. First, make-up methods, cosmetics, jewelry, and hair styles are shown in the classic make-up style of each age. Second, classical make-up visual poetry shows the identity, gender, and character depictions. Third, there were many visual metaphors about the hair types, figures, and hair among the classical make-up methods of each age. I think that this topic is worth researching as an appropriate medium to increase attractiveness. This research is with visual expression elements of the Korea make-up method. This study analyzed the Korean traditional make-up method that expresses and reinterprets visual metaphors. The results of this study can be applied for basic research.

Mass Conservative Fluid Flow Visualization for CFD Velocity Fields

  • Li, Zhenquan;Mallinson, Gordon D.
    • Journal of Mechanical Science and Technology
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    • v.15 no.12
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    • pp.1794-1800
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    • 2001
  • Mass conservation is a key issue for accurate streamline and stream surface visualization of flow fields. This paper complements an existing method (Feng et al. 1997) for CFD velocity fields defined at discrete locations in space that uses dual stream functions to generate streamlines and stream surfaces. Conditions for using the method have been examined and its limitations defined. A complete set of dual stream functions for all possible cases of the linear fields on which the method relies are presented. The results in this paper are important for developing new methods for mass conservative streamline visualization from CFD and using the existing method.

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