• 제목/요약/키워드: visualization technique

검색결과 882건 처리시간 0.019초

New Digital Esthetic Rehabilitation Technique with Three-dimensional Augmented Reality: A Case Report

  • Hang-Nga, Mai;Du-Hyeong, Lee
    • Journal of Korean Dental Science
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    • 제15권2호
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    • pp.166-171
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    • 2022
  • This case report describes a dynamic digital esthetic rehabilitation procedure that integrates a new three-dimensional augmented reality (3D-AR) technique to treat a patient with multiple missing anterior teeth. The prostheses were designed using computer-aided design (CAD) software and virtually trialed using static and dynamic visualization methods. In the static method, the prostheses were visualized by integrating the CAD model with a 3D face scan of the patient. For the dynamic method, the 3D-AR application was used for real-time tracking and projection of the CAD prostheses in the patient's mouth. Results of a quick survey on patient satisfaction with the two visualization methods showed that the patient felt more satisfied with the dynamic visualization method because it allowed him to observe the prostheses directly on his face and be more proactive in the treatment process.

암 모기 흡혈과정 가시화 (Visualization of blood sucking phenomena of a female mosquito)

  • 김보흠;이상준
    • 한국가시화정보학회:학술대회논문집
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    • 한국가시화정보학회 2007년도 추계학술대회
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    • pp.114-115
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    • 2007
  • As a carrier of malaria and sneak of blood, mosquitoes are regarded as an unpleasant insect. However, there are novel phenomena that happen inside a mosquito. Among them, we focused on the blood sucking function of a female mosquito. The main objective of this study was to investigate the mosquito's pumping mechanism in order to resolve the problem encountered when we inject or transport biologic fluids into a micro-chip. To analyze the pumping mechanism, we visualized the blood sucking process inside a female mosquito. Flow characteristics of blood flow in a proboscis were investigated experimentally using a micro-PIV velocity field measurement technique. The anatomical variation of head, thorax, abdomen which work as pumps and valves, was visualized using the syncrotron X-ray micro-imaging technique.

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광-전기역학 기술을 이용한 미생물의 미세유체역학적 제어 (Opto-electrokinetic Technique for Microfluidic Manipulation of Microorganism)

  • 권재성
    • 한국가시화정보학회지
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    • 제17권1호
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    • pp.69-77
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    • 2019
  • This paper introduces microfluidic manipulation of microorganism by opto-electrokinetic technique, named rapid electrokinetic patterning (REP). REP is a hybrid method that utilizes the simultaneous application of a uniform electric field and a focused laser to manipulate various kinds and types of colloidal particles. Using the technique in preliminary experiments, we have successfully aggregated, translated, and trapped not only spherical polystyrene, latex, and magnetic particles but also ellipsoidal glass particles. Extending the manipulation target to cells, we attempted to manipulate saccharomyces cerevisiae (S. cerevisiae), the most commonly used microorganism for food fermentation and biomass production. As a result, S. cerevisiae were assembled and dynamically trapped by REP at arbitrary location on an electrode surface. It firmly establishes the usefulness of REP technique for development of a high-performance on-chip bioassay system.

유동장 데이터의 입체적 가시화를 위한 3-D 가상현실 기법의 적용 (STUDY ON 3-D VIRTUAL REALITY FOR STEREOSCOPIC VISUALIZATION OF FLOW FIELD DATA)

  • 하재황;김병수
    • 한국전산유체공학회:학술대회논문집
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    • 한국전산유체공학회 2010년 춘계학술대회논문집
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    • pp.347-351
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    • 2010
  • In this paper, our effort to apply 3-D Virtual Reality system for stereoscopic visualization of flow data is briefly described. This study is an extension of our previous and on-going research efforts to develop DATA(Data Analysis and Visualization Application) program, which is a data visualization program developed by using Qt as GUI development environment and OpenGL as graphic library. The program is developed upon the framework of object-oriented programming and it was originally developed by using Qt 3.3.3 environment. In this research the program is converted into a Qt 4.3.3-compatible version, and this new version is developed on Visual Studio 2005. And to achieve a stereoscopic viewing capability, two graphic windows are used to render its own viewing image for the lift and right eye respectively. These two windows are merged into one image using 3D monitor and the viewers can see the data visualization results with stereoscopic depth effects by using polarizing glasses. In this paper three dimensional data visualization with stereoscopic technique combined with 3D Monitor is demonstrated, and the current achievement would be a good start-up for further development of low-cost high-quality stereoscopic data visualization system.

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연성회로기판 기반 수평전열관 표면의 비등기포거동 가시화 실험 연구 (Visualization Experiment for Nucleate Boiling Bubble Motion on a Horizontal Tube Heater Fabricated with Flexible Circuit Board)

  • 김재순;김유나;박군철;조형규
    • 한국가시화정보학회지
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    • 제14권2호
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    • pp.52-60
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    • 2016
  • The Passive Auxiliary Feedwater System(PAFS) is one of the advanced safety concepts adopted in the Advanced Power Reactor Plus(APR+). To validate the operational performance of the PAFS, detailed understanding of a boiling heat transfer on horizontal tube outside is of great importance. Especially, in the mechanistic boiling heat transfer model, it is important to visualize the phenomena but there are some limitations with conventional experimental approaches. In the present study, we devised a heater based on the Flexible Printed Circuit Board (FPCB) for a more comprehensive visualization and subsequently, a digital image processing technique for the bubble motion measurement was established. Using the measurement technique, important parameters of the nucleate boiling are analyzed.

관내 응축 시 2상유동 단면구조의 가시화 (Visualization of cross-sectional two-phase flow structure during in-tube condensation)

  • ;김형대
    • 한국가시화정보학회지
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    • 제14권2호
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    • pp.18-24
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    • 2016
  • This paper presents an experimental investigation to visualize cross-sectional two-phase flow structure and identify liquid-gas interface for condensation of steam at a low mass flux in a slightly inclined tube using the axial-viewing technique, which permits to look directly into flow during condensation of steam. In this technique, two-phase flow is viewed along the axis of a pipe by locating a high-speed video camera in front of a viewer that is fitted at the outlet of the pipe. A short section of the pipe is illuminated and is recorded through the viewer, which is kept free of liquid by mildly introducing air. Experiments were conducted in a pipe of 19.05 mm in inner diameter at atmospheric pressure. Cross-sectional two-phase flow structure is obtained at a steam mass flux of $2.62kg/m^2s$ as a function of steam quality in the range from 0.5 to 0.9. The results show that stratified-wavy flow is a unique flow pattern observed in the scope of the present study. Condensate film thickness, stratification angle and void fraction were measured from the obtained flow structure images. Finally, heat transfer coefficient was calculated using the measurement data and discussed in comparison with existing correlations.

미소 액적 내부 유동의 속도측정에 관한 연구 - 굴절영상의 이미지 보정 (Study on the Measurement of Fluid Velocity Within a Small Droplet - Compensation of Refracted Image)

  • 허영근;전영훈;서용권
    • 한국가시화정보학회지
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    • 제7권2호
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    • pp.42-46
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    • 2010
  • In this paper we report the method of visualizing and measuring the fluid flow within a small droplet of millimeter size. We use a vertical laser sheet in visualization of the micrometer size and special attention is given to the arrangement of microscope to obtain clear images. Then we use a PIV technique to measure the velocity of the internal flow from the images taken. Since the droplet is of spherical shape, the images represent highly deteriorated picture of the real objects due to the refraction phenomenon. In order to compensate the refraction, we in this study developed two kinds of methods for the real velocity. In the first method, the refracted images are directly used to obtain the velocity in the image space, and then the velocity is transformed to the real space. In the second method the images are first transformed to the real-space objects, and then the PIV is used to measure the velocity field. We compared the two results to prove the usefulness of the compensation technique.

가시화 기법을 이용한 로터리 압축기 상부의 오일 거동 분석 (Analysis of Oil Behavior inside Upper Part of Rotary Compressor Using Visualization Technique)

  • 조필재;이승갑;윤영;고한서
    • 설비공학논문집
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    • 제17권8호
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    • pp.772-779
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    • 2005
  • An efficiency of a refrigeration cycle and a reliability of a compressor can be reduced if a refrigerant including excessive lubricating oil is exhausted from the compressor. Thus, the analysis of the oil behavior inside the compressor is required to prevent the problem. A tested rotary compressor with visualization windows has been manufactured in this study to investigate the oil behavior using developed visualization techniques. The oil behaviors at various operating conditions have been quantified to obtain the relationship with the outlet pressure inside the compressor. Also, the effect of the operating conditions on the quantity of the exhausted oil from the rotary compressor has been investigated using a manufactured test model.

가상현실 기술을 이용한 입체영상 시각화 기법에 관한 연구 (A Study on the Methodology of Stereo-Scope Visualization Using Virtual Reality Technique)

  • 신미해;임경진;서성원;홍록기;전미연;김의정
    • 한국정보통신학회:학술대회논문집
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    • 한국해양정보통신학회 2010년도 춘계학술대회
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    • pp.374-377
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    • 2010
  • 가상현실 기술을 이용한 시각화는 사용자에게 극대화 된 몰입감을 제공함으로써 기존의 시각화 기법과는 차별화 된 경험을 제공한다. 본 논문에서는 가상현실 기술을 이용한 새로운 입체영상의 시각화 기법을 제안하고, 이에 대한 활용가능성에 대해 논의한다. 이를 통해 사용자들은 더욱 높은 수준의 몰입감을 느끼며, 가상현실을 경험할 수 있을 것이다.

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기상 및 대기질 정보의 3차원 표출 최적화를 위한 시제품 개발 연구 (Prototype Development for Optimization Technique of 3D Visualization of Atmospheric Environmental Information)

  • 김건우;나하나;정우식
    • 한국환경과학회지
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    • 제28권11호
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    • pp.1047-1059
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    • 2019
  • To address the increase of weather hazards and the emergence of new types of such hazards, an optimization technique for three-dimensional (3D) representation of meteorological facts and atmospheric information was examined in this study as a novel method for weather analysis. The proposed system is termed as "meteorological and air quality information visualization engine" (MAIVE), and it can support several file formats and can implement high-resolution 3D terrain by employing a 30 m resolution digital elevation model. In this study, latest 3D representation techniques such as wind vector fields, contour maps, stream vector, stream line flow along the wind field and 3D volume rendering were applied. Implementation of the examples demonstrates that the results of numerical modeling are well reflected, and new representation techniques can facilitate the observation of meteorological factors and atmospheric information from different perspectives.