• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.6
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• pp.11-19
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• 2018

Recently, many companies offer various web-based map that is based on GIS(Geographic Information System) information. Google Map, Open street, Bing Map, Naver Map, Daum Map, Vwolrd Map, etc are the few examples of such system. In this paper, we propose a method to visualize ocean forecasting model data considering the flow diagram of tidal current, streamline expression algorithm, and user convenience by using vector field data information that is currently being served. It is confirmed that the proposed method of the flow diagram of tidal current, and stream line expression algorithm is faster than that of conventional ocean prediction model data by more than 2 times.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2015.11a
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• pp.798-805
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• 2015

본 연구는 국가과학기술지식정보서비스(NTIS) 데이터베이스에 등록된 국내 국가연구개발(R&D)사업 중에 플라즈마 기술 관련 Raw-data를 분석하여 플라즈마 기술 분야에 대한 정부 부처별, 연구수행주체별, 연구개발단계별 등 국내 산학연 전반에 투입된 연구개발(R&D) 예산을 조사 및 분석하였다. 특히, 2012~2014년을 기준으로 플라즈마 기술 관련 연구수행주체(정부부처, 국공립연구소, 출연(연), 대학, 대기업, 중소기업, 중견기업) 각각에 대해 연구 관심 분야 및 핵심기술을 알 수 있는 척도인 연구개발단계(기초, 응용, 개발)와 과학기술표준분류체계 등을 포함한 상호 연계성을 식별 가능한 네트워크로 가시화하였다. 이에 본 논문은 NTIS 데이터 기반 다양한 관점의 시사점을 플라즈마 기술 활성화 전략 수립 사례에 적용함으로써 사전기획 강화를 위한 데이터 분석 방법을 제안한다.

• Journal of the Korea Institute of Military Science and Technology
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• v.9 no.4
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• pp.114-119
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• 2006

Data post-processing programs are used for analysis and visualization of the data obtained from computational fluid methods or flow field experiments. In this paper 3D data visualization system which combines a data visualization program with position tracking system using stereo cameras is introduced. This system offers virtual environment for visualization and analysis of three dimensional data.

• Journal of KIISE
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• v.44 no.3
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• pp.332-337
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• 2017

When using IFC data consisting of STEP schema based on the EXPRESS language, it is not easy for collaborating project stakeholders to share BIM modeling shape information. The IFC viewer application must be installed on the desktop PC to review the BIM modeling shape information defined within the IFC, because the IFC viewer application not only parse STEP structure information model but also process the 3D feature construction for a 3D visualization. Therefore, we propose a lightweight data structure design for web visualization by parsing IFC data and constructing 3D modeling data. Our experimental results show the weight reduction of IFC data is about 40% of original file size and the web visualization is able to see the same quality with all web browsers which support WebGL on PCs and smartphones. If applied research is conducted about the web visualization based on IFC data of the last construction phase, it could be utilized in various fields ranging from the facility maintenance to indoor location-based services.

• Journal of KIISE:Computing Practices and Letters
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• v.6 no.5
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• pp.457-467
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• 2000

본 논문에서는 분산 메모리 구조를 갖는 병렬 컴퓨터 상에서 방대한 크기를 갖는 볼륨 데이터의 효과적인 가시화를 위한 병렬 광선 투사법을 제안한다. 데이터의 압축을 기반으로 하는 본 기법은 다른 프로세서의 메모리로부터 데이터를 읽기보다는 자신의 지역 메모리에 존재하는 압축된 데이터를 빠르게 복원함으로써 병렬 렌더링 성능을 향상시키는 것을 목표로 한다. 본 기법은 객체-순서와 영상-순서 탐색 알고리즘 모두의 정점을 이용하여 성능을 향상시켰다. 즉, 블록 단위의 최대-최소 팔진트리의 탐색과 각 픽셀의 불투명도 값을 동적으로 유지하는 실시간 사진트리를 응용함으로써 객체-공간과 영상-공간 각각의 응집성을 이용하였다. 본 논문에서 제안하는 압축 기반 병렬 볼륨 렌더링 방법은 렌더링 수행 중 발생하는 프로세서간의 통신을 최소화하도록 구현되었는데, 이러한 특징은 프로세서 사이의 상당히 높은 데이터 통신 비용을 감수하여야 하는 PC 및 워크스테이션의 클러스터와 같은 더욱 실용적인 분산 환경에서 매우 유용하다. 본 논문에서는 Cray T3E 병렬 컴퓨터 상에서 Visible Man 데이터를 이용하여 실험을 수행하였다.

• Journal of Korean Library and Information Science Society
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• v.34 no.2
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• pp.209-231
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• 2003

A literature analysis for the planning and implementation of information system was carried out to establish the oceanographic R&D results, the first in Korea. The study targeted from scientific & technical report and to oceanographic survey data. The focus of the analysis lies in the providing practical information retrieval service for oceanographic R&D results based on the framework of effective Dublin Core metadata. The analyses included information system organization, web information service process, data input-output process, web visualization process, and retrieval for planning and implementation of oceanographic survey data and scientific & technical report.

• Journal of KIISE:Computing Practices and Letters
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• v.8 no.6
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• pp.679-691
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• 2002

Volume visualization is an important subarea of scientific visualization, and is concerned with techniques that are effectively used in generating meaningful and visual information from abstract and complex volume datasets, defined in three- or higher-dimensional space. It has been increasingly important in various fields including meteorology, medical science, and computational fluid dynamics, and so on. On the other hand, virtual reality is a research field focusing on various techniques that aid gaining experiences in virtual worlds with visual, auditory and tactile senses. In this paper, we have developed a visualization system for CAVE, an immersive 3D virtual environment system, which generates stereoscopic images from huge human volume datasets in real-time using an improved volume visualization technique. In order to complement the 3D texture-mapping based volume rendering methods, that easily slow down as data sizes increase, our system utilizes an image-based rendering technique to guarantee real-time performance. The system has been designed to offer a variety of user interface functionality for effective visualization. In this article, we present detailed description on our real-time stereoscopic visualization system, and show how the Visible Korean Human dataset is effectively visualized on CAVE.

• Journal of KIISE
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• v.42 no.7
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• pp.910-918
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• 2015

This paper presents a parameter visualization technique to overcome the limitation of the naked eye in contrast-enhanced ultrasonography. A method is also proposed to compensate for the distortion and noise in ultrasound image sequences. Meaningful parameters for diagnosing liver disease can be extracted from the dynamic patterns of the contrast enhancement in ultrasound images. The visualization technique can provide more accurate information by generating a parametric image from the dynamic data. Respiratory motions and noise from micro-bubble in ultrasound data may cause a degradation of the reliability of the diagnostic parameters. A multi-stage algorithm for respiratory motion tracking and an image enhancement technique based on the Markov Random Field are proposed. The usefulness of the proposed methods is empirically discussed through experiments by using a set of clinical data.

• Korea Information Processing Society Review
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• v.15 no.2
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• pp.75-80
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• 2008

e-Science는 고성능 컴퓨팅 장비와 네트워킹 장비를 이용하여 각종 첨단 실험장비, 대용량 데이터, 연구인력 등을 시간 공간의 제약 없이 동시에 활용하도록 하여 연구 생산성을 혁신적으로 향상시킬 수 있다. 이를 효과적으로 지원하기 위해서는 서로 떨어져 있는 연구자들 간의 협업을 위한 기반을 제공하는 것은 매우 기본적인 서비스이다. e-Science로 진행되는 미래형 협업을 위한 지원은 연구자간의 단순한 화상회의에서부터 고성능 네트워크와 컴퓨팅 자원에 기반을 두어 과학적 가시화(scientific visualization)를 공유하는 환경을 제공하는 것까지 다양하게 망라되어 있다. 본 논문에서는 원격지의 협업 연구자간에 데이터를 공유하고 공유된 시각화를 제공하는 e-Science 협업 환경 기술에 대한 소개를 하고자 한다. 특히 Access Grid를 중심으로 한다양한 협업 환경의 구축 노력들을 소개하면서, 이들 노력을 바탕으로 한 향후의 협업 환경 기술의 발전 방향에 대해 소개한다.

• Journal of the Korea Society for Simulation
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• v.19 no.4
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• pp.249-259
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• 2010

Synthetic environment data used in defense M&S fields, which came from various organization and source, are consumed and managed by their own native database system in distributed environment. But to manage these diverse data while interoperation in HLA/RTI environment, neutral synthetic environment data model is necessary to transmit the data between native database. By the support of DMSO, SEDRIS was developed to achieve this requirement and this specification guarantees loss-less data representation, interchange and interoperability. In this research, to use SEDRIS as a standard simulation database, base research, visualization for validation, data interchange experiment through test-bed was done. This paper shows each research case, result and future research direction, to propose standardized SEDRIS usage process.