• 한국콘텐츠학회논문지
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• 제8권6호
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• pp.121-129
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• 2008

소리를 이용한 정보의 표현 방법은 무형의 특징을 가진 매체를 이용하여 어떠한 방법을 통하여 구체적인 형태를 이끌어 내는가에 대한 문제에서 시작된다. 이 과정에서 소리를 매개체로 이용하여 구성되는 오디오-비쥬얼 시스템은 청각적 소재를 이용한 시각적 표현이라는 방법적 측면에서 감각 기관의 연계에 대한 역할을 맡고 있는 부분에서 청각의 시각화라는 비 구체적 감각에 대한 구체화라는 변형의 의미를 갖는다. 오디오-비쥬얼 시스템 형태를 통한 작품을 표현하는데 있어 기존에 사용되던 프로그래밍을 통한 비규칙적 프로시쥬얼(Procedure)적 동적(動的) 이미지 또는 비동적(非動的) 이미지를 사용한 표현 방법에서 시각적 출력 방법의 제한으로 인한 표현 방법의 제한이 생겨날 수 있는 부분에 있어 동적 이미지를 이용한 오디오-비쥬얼 시스템을 통하여 소리를 매체로 한 다양한 표현 결과물을 이끌어낼 수 있다. 본 논문에서는 동적 이미지를 사용한 오디오-비쥬얼 시스템을 통해 다양한 청각적 소재의 시각화 방법 및 소리를 이용한 애니메이션 표현법의 새로운 대안을 제시한다.

• 한국가시화정보학회지
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• 제7권2호
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• pp.17-21
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• 2010

This paper presents the fabrication and performance measurement of a temperature sensor array on a flexible substrate attachable to a curved surface using MEMS technology. Specifically, the fabrication uses the well-developed printed circuit board fabrication technology for complex electrode definition. The temperature sensor array are lifted off with a $10{\times}10$ matrix in a $50\;mm{\times}50\;mm$ to visualize temperature distribution. Copper is used as temperature sensing material to measure the change in resistances with temperature increase. In a thermal oven with temperature control, the temperature sensor array is Characterized. The constant slope of resistance change is obtained and temperature distribution is measured from the relationship between resistance and temperature.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2019년도 춘계학술대회
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• pp.479-481
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• 2019

최근, 가상현실(VR) 기술을 이용하여 다양한 산업 분야의 훈련 시스템을 제작하여 교육에 널리 활용하고 있다. 가상현실 기반 훈련 시스템은 안전할 뿐만 아니라 재료의 낭비도 없고, 언제 어디서든 실습을 해 볼 수가 있어서 여러 가지 장점이 있다. 예를 들면, 가상현실 용접 훈련 시뮬레이션 시스템은 몰입형 환경에서 철판 모재의 접합을 실제와 같이 수행할 수 있어서 현장 작업자 및 신입 교육 훈련에 널리 쓰이고 있다. 이 때 철판 모재 접합을 사실적으로 표현하는 것이 훈련의 효과를 극대화하기 위해 중요하지만 기존의 기술로는 접합의 효과를 자연스럽게 표현하기에는 한계가 있었다. 본 연구에서는 용접 훈련 시스템을 구축하기 위해 접합 효과를 쉐이더 기반으로 표현하는 방법을 경험 DB와 수학적 모델 기반으로 제시하고자 한다. 본 연구 논문의 결과를 용접 훈련 시스템에 적용하면 철판 모재의 접합 가시화를 사용자에게 정밀도 높게 제공하여 용접 훈련 효과를 보다 향상하는데 도움을 줄 수 있겠다.

• 한국해양공학회지
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• 제10권3호
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• pp.105-116
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• 1996

In this paper, we report the experimental results for the flow pattern and the material transport around a cavity subject to a sinusoidal external flow at the far region to ward the open side of the cavity. A tilting mechanism is used to generate a oscillatory flow inside a shallow rectangular container having a cavity at one side. The surface flow visualization is performed to obtain the unsteady behavior of vortices generated at two edges situated at the entrance of the cavity. It was found that at the period 4.5 sec., the behavior of the vortices is asymmetric, and there exists a steady residual flow in the cavity. The bottom flow patterns are also visualized. There are two regions outside of the cavity where the bottom fluid particles concentrate. The material transport in this flow model is very peculiar; fluid particles in the cavity flows outward through the passage along the walls starting from the edges, and particles in the outer region approach the cavity from the central region.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2008년도 춘계학술대회논문집
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• pp.679-682
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• 2008

The particle which has two different characteristics on both sides is called Janus particle which is emerging as a key material in microscale transport systems. For example, if one hemisphere has polarity and the other does not, then nonpolar sides would attract each other so that a complex cluster is formed. Thus, this fascinating material can be used as an element of twisting ball panel display, complex micro-scale clusters, drug delivery unit, and active detecting beads. The keywords in developing Janus particle are size and uniformity. Former researches solved uniformity but downsizing still remains a problem. There are three methods to generate small size particles in microchannels: co-flowing, cross-flowing, and elongational flows. In this research, we generate Janus particles smaller than 10-${\mu}$m in diameter using elongational flow in microchannels. And we use UV initiator with Hydrogen UV source to solidify micro size particles. One hemisphere of the particle is coated with rhodamin for visualization.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제9권3호
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• pp.187-201
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• 2005

The spreadsheet Microsoft Excel is the most widely used mathematical tool in today's workplace. Moreover, it is also an outstanding means for developing a surprisingly wide range of creative and innovative educational uses within such areas as mathematical modeling, visualization, and instruction. The spreadsheet's format provides us with a tool that closely parallels the way in which we naturally carry out problem solving, while the spreadsheet creation process itself illuminates the underlying mathematical concepts. In addition, the spreadsheet's visual layout allows us to introduce a broad variety of challenging and interesting topics, and to design creative demonstrations through eye-catching animated graphics. The material presented comes from actual classroom mathematics teaching experience in both industrially advanced and developing nations. A series of highly visual interactive illustrations from mathematics, the natural and social sciences, computing, engineering, and the arts provide a number of usable examples. The material discussed is applicable at diverse levels, ranging from schools and universities through adult education and in-service teacher development programs.

• 한국가시화정보학회:학술대회논문집
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• 한국가시화정보학회 2004년도 Proceedings of 2004 Korea-Japan Joint Seminar on Particle Image Velocimetry
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• pp.41-45
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• 2004

The dynamic particle image velocimetry (PIV) is consisted of a high frequency pulse laser, high speed cameras and a timing controller. The three velocity components of flow downstream of an axial flow fan for PC cooling system are measured using the dynamic PIV system. An Axial flow fan has seven blades of 72 mm in diameter. The rotating speed is 1800 rpm. The downstream flow is visualized by smoke particles of about $0.3-1\;{\mu}m$ in diameter. The three-dimensional instantaneous velocity fields are measured at three downstream planes. The swirl velocity component was diffused downstream and the change in time-mean vorticity distribution downstream was also discussed. The spatio-temporal change in axial velocity component with the blades passing is recognized by the instantaneous vector maps. And the dynamic behavior of vorticity moving with the rotating blades is discussed using the unsteady vorticity maps.

• International Journal of Naval Architecture and Ocean Engineering
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• 제9권2호
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• pp.209-218
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• 2017

Sea ice is the main factor affecting the safety of the Arctic engineering. However, traditional numerical methods derived from classical continuum mechanics have difficulties in resolving discontinuous problems like ice damage. In this paper, a non-local, meshfree numerical method called "peridynamics", which is based on integral form, was applied to simulate the interaction between level ice and a cylindrical, vertical, rigid structure at different velocities. Ice in the simulation was freshwater ice and simplified as elastic-brittle material with a linear elastic constitutive model and critical equivalent strain criterion for material failure in state-based peridynamics. The ice forces obtained from peridynamic simulation are in the same order as experimental data. Numerical visualization shows advantages of applying peridynamics on ice damage. To study the repetitive nature of ice force, damage zone lengths of crushing failure were computed and conclude that damage zone lengths are 0.15-0.2 times as ice thickness.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2013년도 제46회 KOSCO SYMPOSIUM 초록집
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• pp.97-98
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• 2013

Flame behaviors in meso-scale rectangular channels are largely influenced by heat recirculation through wall. In order to investigate the effects of wall thermal property on the heat recirculation and flame behaviors, meso-scale rectangular channels, of which upper and lower walls are made of quartz, stainless steel and silicon carbide and front and rear walls of quartz for flame visualization, were fabricated in this study. As a result, characteristic mixture velocities of propane-air flame, such as transition, stationary, and instability onset velocities, were measured for each channel and various mixture conditions. The results show that thermal conductivity has a close relationship to the characteristic velocities.

• 대한안전경영과학회지
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• 제14권4호
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• pp.147-152
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• 2012

Supply chain including transportation expend the 21% of domestic energy consumption. It is necessary to diminish the excess energy usage at entire supply chain. This paper deals with the application of MFCA(Material Flow Cost Accounting) for SCM to save energy consumption. We construct the material center corresponding to each logistics function in order to apply the MFCA for GCM(Green Chain Management). We also construct the MFCA framework which consists of MFCA Database Management, MFCA Visualization, GCM Data Integration, GCM Data Tracking, and MFCA Data Predict & Assignment. We expect to help determining the range of logistics function to apply the MFCA for GCM.