• Journal of Information Processing Systems
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• 제19권6호
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• pp.722-729
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• 2023

Visual analytic for intangible cultural heritage has recently developed in China. Using advanced interactive visualization tools experts can observe data distribution trends and explore the implicit relationships among data within a short time. It can enhance human cognitive and analytical abilities and improve the scientific preservation of intangible cultural heritage. To support this research topic, we have reviewed recent visualization works on intangible cultural heritage in China. We divide these works into three types: text visualization, multi-dimensional visualization, and geographical visualization. Each type is illustrated by several representative works. New development trends in this area are also discussed.

• 지능정보연구
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• 제20권2호
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• pp.39-58
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• 2014

빅데이터의 중요성에 대한 인식이 확산되고, 관련한 기술이 발전됨에 따라, 최근에는 빅데이터의 처리와 분석의 결과를 어떻게 시각화할 것인지가 매우 관심 받는 주제로 부각되고 있다. 이는 분석된 결과를 보다 명확하고 효과적으로 전달하는 데에 있어서 데이터의 시각화가 매우 효과적인 방법이기 때문이다. 시각화는 분석 시스템과 사용자가 소통하기 위한 하나의 그래픽 사용자 인터페이스(GUI)를 담당하는 역할을 한다. 통상적으로 이러한 GUI 부분은 데이터의 처리나 분석의 결과와 독립될 수록 시스템의 개발과 유지보수가 용이하며, MVC(Model-View-Controller)와 같은 디자인 패턴의 적용을 통해 GUI와 데이터 처리 및 관리 부분 간의 결합도를 최소화하는 것이 중요하다. 한편 빅데이터는 크게 정형 데이터와 비정형 데이터로 구분할 수 있는데 정형 데이터는 시각화가 상대적으로 용이한 반면, 비정형 데이터는 시각화를 구현하기가 복잡하고 다양하다. 그럼에도 불구하고 비정형 데이터에 대한 분석과 활용이 점점 더 확산됨에 따라, 기존의 전통적인 정형 데이터를 위한 시각화 도구들의 한계를 벗어나기 위해 각각의 시스템들의 목적에 따라 고유의 방식으로 시각화 시스템이 구축되는 현실에 직면해 있다. 더욱이나 현재 비정형 데이터 분석의 대상 중 대부분을 차지하고 있는 텍스트 데이터의 경우 언어 분석, 텍스트 마이닝, 소셜 네트워크 분석 등 적용 기술이 매우 다양하여 하나의 시스템에 적용된 시각화 기술을 다른 시스템에 적용하는 것이 용이하지 않다. 이는 현재의 텍스트 분석 결과에 대한 정보 모델이 서로 다른 시스템에 적용될 수 있도록 설계되지 못하는 경우가 많기 때문이다. 본 연구에서는 이러한 문제를 해결하기 위하여 다양한 텍스트 데이터 분석 사례와 시각화 사례들의 공통적 구성 요소들을 식별하여 표준화된 정보 모델인 텍스트 데이터 시각화 모델을 제시하고, 이를 통해 시각화의 GUI 부분과 연결할 수 있는 시스템 모델로서의 시각화 프레임워크인 TexVizu를 제안하고자 한다.

• Genomics & Informatics
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• 제12권1호
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• pp.21-34
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• 2014

A visual analysis approach and the developed supporting technology provide a comprehensive solution for analyzing large and complex integrated genomic and biomedical data. This paper presents a methodology that is implemented as an interactive visual analysis technology for extracting knowledge from complex genetic and clinical data and then visualizing it in a meaningful and interpretable way. By synergizing the domain knowledge into development and analysis processes, we have developed a comprehensive tool that supports a seamless patient-to-patient analysis, from an overview of the patient population in the similarity space to the detailed views of genes. The system consists of multiple components enabling the complete analysis process, including data mining, interactive visualization, analytical views, and gene comparison. We demonstrate our approach with medical scientists on a case study of childhood cancer patients on how they use the tool to confirm existing hypotheses and to discover new scientific insights.

• 대한수학교육학회지:학교수학
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• 제1권1호
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• pp.135-156
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• 1999

The purpose of this study is to discuss about the role of the visualization as an effective method of teaching abstracted mathematics, to analyze visual materials in middle and high school mathematics and to suggest various visualized materials for teaching mathematics effectively. Though formal, symbolic and analytical teaching method is a major characteristic of mathematics, the students should be taught to understand through intuition and insight, and formalize the mathematical concepts progressively. Especially the sight is one of the most important basics of cognition for intuition and insight. Therefore, suggesting mathematical contents through the visual method makes the students understand and formalize the mathematical concepts more easily. In this study, we tried to investigate the meaning and role of visualization in mathematics teaching. And, we discussed about the four roles of visualization in the process of mathematics teaching and learning confirmation and memorization of the mathematical truth, proving theorem and solving problems which is one of the most important purposes of teaching mathematics, According to the roles of visualization, we analyzed visual materials currently taught in middle and high school, and suggested various visual materials useful in teaching mathematics. The investigated fields are algebra where visual materials are little used, and geometry where they are use the most. The paper-made-textbook can't show moving animation vigorously. Hence we suggested visual materials made by GSP and applets in IES .

• 한국가시화정보학회지
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• 제3권2호
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• pp.45-50
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• 2005

Electro-osmotic flow (EOF) instability in a microchannel has been experimentally investigated using a micro-PIV system. The micro-PIV system consisting of a two-head Nd:Yag laser and cooled CCD camera was used to measure instantaneous velocity fields and vorticity contours of the EOF instability in a T-shape glass microchannel. The electrokinetic flow instability occurs in the presence of electric conductivity gradients. Charge accumulation at the interface of conductivity gradients leads to electric body forces, driving the coupled flow and electric field into an unstable dynamics. The threshold electric field above which the flow becomes unstable and rapid mixing occurs is about 1000V/cm. As the electric field increases, the flow pattern becomes unstable and vortical motion is enhanced. This kind of instability is a key factor limiting the robust performance of complex electrokinetic bio-analytical devices, but can also be used for rapid mixing and effective flow control fer micro-scale bio-chips.

• Journal of Ship and Ocean Technology
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• 제8권4호
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• pp.34-44
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• 2004

Engine visualization is the most important process to develop the new engine. But this step has a major difficulty that is almost impossible to access the engine on running. Therefore, little indication from the experimental and analytical results has been so far. This work has conducted the important issue of developing a quartz liner. And it has given us good qualitative and quantitative results of temperature and stress fields in the quartz cylinder by considering forced convection of outside quartz liner, thickness of the quartz liner and preheating effect to operate quartz engine safely.

• 한국가시화정보학회:학술대회논문집
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• 한국가시화정보학회 2001년도 Proceedings of 2001 Korea-Japan Joint Seminar on Particle Image Velocimetry
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• pp.62-74
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• 2001

Present paper describes the principles of PIV measurement approaching from the analytical view, which enables to explain the general form of principles covering all the PIV measurement, and that gives theoretical basis for its higher measurement performances. The explanation of the measurement principles started from the definition of governing equation in differential form as same as the gradient method, and the integral along the particle path line was executed to show the principle of the correlation method with same basis. The integral processes clearly shows the analytical reason why the correlation peak gives the terminal point of path line, and how the effects of deformation and rotation of fluid appears in the correlation map. These results have no differences from our experiences and understandings of the conventional PIV measurement definition in final form. However, the analytical approach enable to understand those facts a priori, and it makes easy to achieve the innovative higher performances of measurement. Analytical explanation clearly shows the behavior of the residual errors caused by the fluid motion, and it enables to analyze the measurement uncertainty theoretically.

• KEPCO Journal on Electric Power and Energy
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• 제4권1호
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• pp.13-17
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• 2018

According to the recent blackouts, large blackouts can be described by cascading outages. Cascading outage is defined by sequential outages from an initial disturbance. Sequential and probabilistic approach are necessary to minimize the blackout damage caused by cascading outages. In addition, conventional cascading outage analysis models are computationally complex and have time constraints, it is necessary to develop the new analytical techniques. In this paper, we propose the advance visualization model for probabilistic analysis of cascading failure risks. We introduce the visualization model for identifying size of cascading and potential outages and estimate the propagation rate of sequential outage simulation. The proposed model is applied to Korean power systems.

• 한국소음진동공학회논문집
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• 제13권8호
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• pp.626-636
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• 2003

The beat distribution property of the King Seong-deok Divine Bell is investigated by experiment and analysis. The beat map method is proposed to explain the beat distribution property on the circumference of the bell. For the analytical investigation, an analytical model of the vibration beat is derived on a slightly asymmetric shell of revolution by using the modal expansion method. In the analytical method, the beat map can be drawn only if the modal parameters of the bell are obtained. The analytical beat model is applied to draw the beat map of the King Seong-deok Divine Bell. The validity of the analytical method is verified by comparing the analytical beat maps with the experimental results. This paper proposes a visualization method of the beat and theoretically identifies the reason why the clear and unclear beats repeat periodically along the circumference of the bell and how the striking position influences the beat distribution property.

• 한국정보처리학회논문지
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• 제7권2호
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• pp.477-487
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• 2000

본 논문에서는 체적 시각화 과정을 이론적으로 고찰하여 시각화 모델을 제시하고 그 모델로 유도된 관계로부터 미분 방정식을 이용하여 분석적 체적 시각화 해법을 구하였다. 이 분석적 방법을 제적 시각화의 대표적인 방법인 Levoy의 이산적 광선 추적법과 비교하여 본 연구에서 제시한 방법의 특수한 형태가 Levoy의 이산적 방법임을 보였다. 그리고 체적 데이터를 시각화기 위해서는 사용자가 시각화하기를 원하는 부위를 선택하고 이 부분만을 추출하는 영역 분할 작업이 필요하다. 본 논문에서는 영역확장법에 기반을 둔 효율적인 3차원 영역 분할 기법을 개발하여 위의 분석적인 방법을 이용하여 3차원 제적 데이터의 시각화를 위한 시스템을 구현하였다. 그리고 본 접근법에 대한 의의와 유용함에 대한 가설적인 결론을 구현된 시스템을 이용한 실험에 근거하여 유도하였다. Lovoy의 이산적인 방법과 분석적인 방법을 같은 데이터에 대해 3차원 영역 분할 수행 후 적용한 실험은 분석적인 방법이 이산적인 방법에 비해 렌더링된 이미지의 질이 더 좋음을 보여준다.