• Title/Summary/Keyword: Parallel Visualization

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Efficient Parallel Visualization of Large-scale Finite Element Analysis Data in Distributed Parallel Computing Environment (분산 병렬 계산환경에 적합한 초대형 유한요소 해석 결과의 효율적 병렬 가시화)

  • Kim, Chang-Sik;Song, You-Me;Kim, Ki-Ook;Cho, Jin-Yeon
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.32 no.10
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    • pp.38-45
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    • 2004
  • In this paper, a parallel visualization algorithm is proposed for efficient visualization of the massive data generated from large-scale parallel finite element analysis through investigating the characteristics of parallel rendering methods. The proposed parallel visualization algorithm is designed to be highly compatible with the characteristics of domain-wise computation in parallel finite element analysis by using the sort-last-sparse approach. In the proposed algorithm, the binary tree communication pattern is utilized to reduce the network communication time in image composition routine. Several benchmarking tests are carried out by using the developed in-house software, and the performance of the proposed algorithm is investigated.

FDANT-PCSV: Fast Detection of Abnormal Network Traffic Using Parallel Coordinates and Sankey Visualization (FDANT-PCSV: Parallel Coordinates 및 Sankey 시각화를 이용한 신속한 이상 트래픽 탐지)

  • Han, Ki hun;Kim, Huy Kang
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.30 no.4
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    • pp.693-704
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    • 2020
  • As a company's network structure is getting bigger and the number of security system is increasing, it is not easy to quickly detect abnormal traffic from huge amounts of security system events. In this paper, We propose traffic visualization analysis system(FDANT-PCSV) that can detect and analyze security events of information security systems such as firewalls in real time. FDANT-PCSV consists of Parallel Coordinates visualization using five factors(source IP, destination IP, destination port, packet length, processing status) and Sankey visualization using four factors(source IP, destination IP, number of events, data size) among security events. In addition, the use of big data-based SIEM enables real-time detection of network attacks and network failure traffic from the internet and intranet. FDANT-PCSV enables cyber security officers and network administrators to quickly and easily detect network abnormal traffic and respond quickly to network threats.

Analysis and Application of Performance Improvement of a Real-time Simulation Visualization based on Multi-thread Pipelining Parallel Processing (다중 스레드 파이프라인 병렬처리를 통한 실시간 시뮬레이션 시각화의 성능 향상 해석 및 적용)

  • Lee, Jun Hee;Song, Hee Kang;Kim, Tag Gon
    • Journal of the Korea Society for Simulation
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    • v.26 no.3
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    • pp.13-22
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    • 2017
  • This research proposes and applies a pipelining parallel processing technique to enhance the speed of visualizing the results of real-time simulations. Generally, a simulation with real-time visualization consists of three processes: executing a simulation model, transmitting simulation result, and visualizing simulation result. If we have these processes in serial, the latency from simulation to visualization will be very long, which degrades the speed of visualization of data from real-time simulation. Thus, the main purpose of this research is maximizing performance by adapting pipelining parallel processing technique to the real-time simulation visualization. Also we show that performance is improved by adding multi-threading technique to each process. This paper proposes a theoretical performance model and simulation results of the techniques and then we applied this to an air combat simulation model as a case study. As the result, it shows that the performance is greatly enhanced than the original model's execution time.

Realtime Monitoring and Visualization for PDP System (PDP 시스템의 실시간 모니터링 및 시각화)

  • 김수자;송은하;박복자;정영식
    • Journal of Korea Multimedia Society
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    • v.7 no.5
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    • pp.755-765
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    • 2004
  • Recently, the Internet-based distributed/parallel computing using many of idle hosts has been demonstrated its usefulness for processings of a large-scale task and involving several important issues. While executing a large-scale task, the realtime monitoring is required for adaptive strategy of the performance and state change of host. This paper provides the realtime monitoring and visualization on global computing infrastructure called PDP(Parallel Distributed Processing) which is a parallel computing framework implemented with Jana for parallel computing on the Internet.

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Variable Arrangement for Data Visualization

  • Huh, Moon Yul;Song, Kwang Ryeol
    • Communications for Statistical Applications and Methods
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    • v.8 no.3
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    • pp.643-650
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    • 2001
  • Some classical plots like scatterplot matrices and parallel coordinates are valuable tools for data visualization. These tools are extensively used in the modern data mining softwares to explore the inherent data structure, and hence to visually classify or cluster the database into appropriate groups. However, the interpretation of these plots are very sensitive to the arrangement of variables. In this work, we introduce two methods to arrange the variables for data visualization. First method is based on the work of Wegman (1999), and this is to arrange the variables using minimum distance among all the pairwise permutation of the variables. Second method is using the idea of principal components. We Investigate the effectiveness of these methods with parallel coordinates using real data sets, and show that each of the two proposed methods has its own strength from different aspects respectively.

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Visualization of Interacting Parallel Supersonic Free Jets using NO-LIF

  • Niimi Tomohide;Ishida Toshihiko
    • 한국가시화정보학회:학술대회논문집
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    • 2001.12a
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    • pp.36-43
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    • 2001
  • The flow field structures of two interacting parallel supersonic free jets are studied by flow visualization using planar laser-induced fluorescence of NO seeded in nitrogen gas. The experiments are carried out for several distances between two orifice centers and for various ratios of the pressure in the reservoir to that in the expansion chamber. The flow fields are visualized mainly on the plane including two jet centerlines and its characteristic shock system, especially a cell structure formed secondly by interaction of two jets, are analyzed. The positions of the normal shock depending on the pressure ratios are also compared.

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Numerical Visualization of the Shock Wave System Discharged from the Exits of Two-Parallel Ducts (두 평행한 관 출구로부터 방출되는 충격파시스템의 수치해석적 가시화)

  • Jung Sung Jae;Kweon Yong Hun;Kim Heuy Dong;Kang Chang Soo
    • 한국가시화정보학회:학술대회논문집
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    • 2004.11a
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    • pp.72-75
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    • 2004
  • The present study describes a computational work to investigate detailed behaviors of the twin shock waves discharged from the exits of two-parallel ducts. In computations, the Yee-Roe-Davis's TVD scheme was used to solve the unsteady, three-dimensional, inviscid, compressible, Euler equations. The distance between two ducts is varied and the Mach number of the incident shock wave is changed below 2.0. The results obtained show that on the symmetric axis between two-parallel ducts, the maximum pressure achieved by the merge of twin shock waves and its location strongly depend upon the distance between two-parallel ducts and the Mach number of the incident shock wave. It is also found that the twin shock waves discharged from the exits of two-parallel ducts leads to the complicated flow fields, such as Mach stem, spherical waves, and vertical structures.

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Applications of Parallel Coordinate Plots for Visualizing Gene Expression Data (평행좌표 플롯을 활용한 유전자발현 자료의 시각화)

  • Park, Mi-Ra;Kwak, Il-Youp;Huh, Myung-Hoe
    • The Korean Journal of Applied Statistics
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    • v.21 no.6
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    • pp.911-921
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    • 2008
  • Visualization of the gene expression data on a low-dimensional graph is helpful in uncovering biological information contained in the data. In this study, we focus on two modified versions of the parallel coordinate plot. First one is the ePCP(enhanced parallel coordinate plot) which shows "near smooth" connecting curves between axes spaced proportionately to the proximity of re-ordered variables. Second one is APCP(Andrews' type parallel coordinate plot) which is obtained by rotating Andrews' plot that has a form of the parallel coordinate plot. Visualization procdures using ePCP and APCP are given for the lymphoma data case.

Visualization Method of Social Networks Service using Message correlations based on Distributed Parallel Processing (메시지의 상관관계를 이용한 분산병렬처리 기반의 소셜 네트워크 서비스 시각화 방법)

  • Kim, Yong-Il;Park, Sun;Ryu, Gab-Sang
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.17 no.5
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    • pp.1168-1173
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    • 2013
  • This paper proposes a new visualization method based on cloud technique which uses internal relationship of user correlation and external relation of social network to visualize user relationship hierarchy. The visualization method of this paper can well represent user-focused relationship hierarchy on social networks by a correlation matrix. The importance of a access node reflects into user relationship hierarchy by exploiting external relation of social network. Users of the method can well understand user relationships on account of representing user relationship hierarchy from social networks. In addition, the method use hadoop and hive for distribution storing and parallel processing which the result of calculation visualizes hierarchy graph using D3.

Development of Mobile Volume Visualization System (모바일 볼륨 가시화 시스템 개발)

  • Park, Sang-Hun;Kim, Won-Tae;Ihm, In-Sung
    • Journal of KIISE:Computing Practices and Letters
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    • v.12 no.5
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    • pp.286-299
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    • 2006
  • Due to the continuing technical progress in the capabilities of modeling, simulation, and sensor devices, huge volume data with very high resolution are common. In scientific visualization, various interactive real-time techniques on high performance parallel computers to effectively render such large scale volume data sets have been proposed. In this paper, we present a mobile volume visualization system that consists of mobile clients, gateways, and parallel rendering servers. The mobile clients allow to explore the regions of interests adaptively in higher resolution level as well as specify rendering / viewing parameters interactively which are sent to parallel rendering server. The gateways play a role in managing requests / responses between mobile clients and parallel rendering servers for stable services. The parallel rendering servers visualize the specified sub-volume with rendering contexts from clients and then transfer the high quality final images back. This proposed system lets multi-users with PDA simultaneously share commonly interesting parts of huge volume, rendering contexts, and final images through CSCW(Computer Supported Cooperative Work) mode.