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conference on visualization and data analysis 2007

作者： Moreland, Kenneth Avila, Lisa Fisk, Lee Ann Sandia Natl Labs 1515 Eubank SE Albuquerque NM 87185 USA Kitware Inc Clifton Pk NY USA

ISBN: (纸本)9780819466082

ParaView is a popular open-source general-purpose scientific visualization application. One of the many visualization tools available within ParaView is the volume rendering of unstructured meshes. Volume rendering is a technique that renders a mesh as a translucent solid, thereby allowing the user to see every point in three-dimensional space simultaneously. Because volume rendering is computationally intensive, ParaView now employs a unique parallel rendering algorithm to speed the processes. The parallel rendering algorithm is very flexible. It works equally well for both volumes and surfaces, and can properly render the intersection of a volume and opaque polygonal surfaces. The parallel rendering algorithm can also render images for tiled displays. In this paper, we explore the implementation of parallel unstructured volume rendering in ParaView.

关键词： ParaView volume rendering volume visualization parallel rendering

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Learning Management Systems' database exploration by means of Information visualization-based query tools

Learning Management Systems' database exploration by means o...

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7th IEEE International conference on Advanced Learning Technologies

作者： da Silva, Celmar Guimaraes da Rocha, Heloisa Vieira Univ Estadual Campinas Inst Comp BR-13084971 Campinas SP Brazil

ISBN: (纸本)9780769529165

Learning Management Systems (LMSs) store different kinds of e-learning related data, whose analysis is important for monitoring students' learning processes and for helping detection of potential problems on these processes. Different researches apply Information visualization concepts and techniques for graphically and interactively presenting LMS data for analysis. Nonetheless, these researches show data obtained by predefined database queries, which fit only specific analysis situations, in despite of unforeseen situations derived from final user's knowledge about e-learning domain. Taking into account these situations, this paper presents a solution that enable LMS users to define database attributes they want to analyze, without need to know the internal organization of LMS database. Selected attributes are treated as a universal relation query and, after executed, query results are automatically converted into interactive graphical representations, avoiding user's concern with selecting the more adequate chart.

关键词： Query processing

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Interactive visual analysis of time-series microarray data

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VISUAL COMPUTER 2008年第12期24卷 1053-1066页

作者： Jeong, Dong Hyun Darvish, Alireza Najarian, Kayvan Yang, Jing Ribarsky, William Univ N Carolina Charlotte Visualizat Ctr Charlotte NC 28223 USA Univ N Carolina Dept Comp Sci Bioinformat & Adv Signal Proc Lab Charlotte NC 28223 USA Virginia Commonwealth Univ Sch Engn Dept Comp Sci Biomed Signal & Image Proc Lab Richmond VA 23284 USA

Estimating dynamic regulatory pathways using DNA microarray time-series can provide invaluable information about the dynamic interactions among genes and result in new methods of rational drug design. Even though several purely computational methods have been introduced for DNA pathway analysis, most of these techniques do not provide a fully interactive method to explore and analyze these dynamic interactions in detail, which is necessary to obtain a full understanding. In this paper, we present a unified modeling and visual approach focusing on visual analysis of gene regulatory pathways over time. As a preliminary step in analyzing the gene interactions, the method applies two different techniques, a clustering algorithm and an auto regressive (AR) model. This approach provides a successful prediction of the dynamic pathways involved in the biological process under study. At this level, these pure computational techniques lack the transparency required for analysis and understanding of the gene interactions. To overcome the limitations, we have designed a visual analysis method that applies several visualization techniques, including pixel-based gene representation, animation, and multi-dimensional scaling (MDS), in a new way. This visual analysis framework allows the user to quickly and thoroughly search for and find the dynamic interactions among genes, highlight interesting gene information, show the detailed annotations of the selected genes, compare regulatory behaviors for different genes, and support gene sequence analysis for the interesting genes. In order to enhance these analysis capabilities, several methods are enabled, providing a simple graph display, a pixel-based gene visualization technique, and a relation-displaying technique among gene expressions and gene regulatory pathways.

关键词： Visual analysis Information visualization Microarray anaysis Bioinformatics

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LIVE data Workspace: A Flexible, Dynamic and Extensible Platform for Petascale Applications

LIVE Data Workspace: A Flexible, Dynamic and Extensible Plat...

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IEEE International conference on Cluster Computing

作者： Abbasi, Hasan Wolf, Matthew Schwan, Karsten Georgia Inst Technol Coll Comp Atlanta GA 30332 USA

ISBN: (纸本)9781424413874

The data needs of current and future PetaScale applications have increased over the last half decade to the extent that appropriate data management has become a crucial requirement. This concerns not only the storage of data produced by the new class of PetaScale applications, but also the data exchanges needed for coupling applications with concurrent analysis, online data visualization for validation, and others. To address such dynamic code coupling, we introduce the concept of an extensible, dynamic, and flexible data workspace, termed LIVE. In contrast to the data exchanges programmed with MPI, MPI-IO, or grid software, LIVE focuses on data exchanges carried out without a priori knowledge of potential data requirements. Examples include exchanges required by adhoc or dynamically determined methods for data validation, for general data analysis tasks, or for data visualization. Run on an execution environment comprised of integrated dynamic discovery and on-line management services, LIVE is used to create a 'data workspace' for a working molecular dynamics code base utilized by mechanical and materials engineers at Georgia Tech, for multi-scale materials modeling. Measurements of both this application's data workspace and of the basic primitives in the LIVE framework demonstrate that the environment's substantial flexibility has minimal impact on overall performance, and in fact, that it improves performance in a number of usage scenarios. In particular, for a visualization pipeline example derived from our collaborators, we see a slight improvement over a solution based on MPI-IO, and a further improvement of up to 5% by utilizing LIVE's ability to overlap communication with user-specified computation.

关键词： Electronic data interchange

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Interactive cross-detector analysis of vortical flow data

Interactive cross-detector analysis of vortical flow data

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International conference on Coordinated and Multiple Views in Exploratory visualization 2007

作者： Buergerl, Raphael Muigg, Philipp Doleisch, Helmut Hauser, Helwig Vienna Univ Technol Inst Comp Graph A-1040 Vienna Austria VRV Res Ctr Vienna Austria

ISBN: (纸本)9780769529035

In this paper we discuss the application of multiple linked views for advanced vortex investigation inflow data. Local feature detectors and additional measures integrate into an interactive flow feature detection system based on multiple linked views. We discuss how linking and brushing of derived feature information can lead to increased performance in interactive feature analysis. In a case study we demonstrate how the possibility to integrate the information of multiple detectors leads to sound understanding of vortex type features. Enhanced credibility and combined advantages of several detectors can be achieved by uniting the results of multiple feature detectors in multiple coordinated views.

关键词： data reduction

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PRISMA - A multidimensional information visualization tool using multiple coordinated views

PRISMA - A multidimensional information visualization tool u...

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11th International conference Information visualization, IV 2007

作者： Godinho, Paulo Igor A. Meiguins, Bianchi Serique Meiguins, Amanda Simões Gonçalves Do Carmo, Ricardo M. Casseb De Brito Garcia, Marcelo Almeida, Leandro Hernandez Lourenço, Rodrigo Belém-Pará Brazil Belém-Pará Brazil Belém-Pará Brazil

Information visualization techniques have been successfully used to build visual and interactive analysis of data and data relationships. However, dimensionality, volume and diversity make it difficult for a single technique to completely solve the problem. Information visualization tools that support multiple coordinated views allow the user to better understand the dataset by providing different perspectives based on the same set of data items. These tools support the correlation between data views and the coordinated real-time interaction mechanisms. The goal of this paper is to present the PRISMA information visualization tool that explores the use of multiple coordinated views. PRISMA provides usability, portability and extensibility. Initial usability essays are discussed. © 2007 IEEE.

关键词： Information analysis

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visualization of users' activities in a specific environment

Visualization of users' activities in a specific environment

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2007 Winter Simulation conference

作者： Mikovec, Zdenek Maly, Ivo Slavik, Pavel Curin, Jan Czech Tech Univ Dept Comp Engn & Sci Karlovo Namesti 13 Prague 12135 Czech Republic Iran Univ Sci & Technol Tehran Iran

ISBN: (纸本)9781424413058

Evaluation of user interface design is usually based on usability testing methods. In this paper we analyzed and described the user behavior in the form of the user model. The user model is built on a data set which was acquired through observation of user behavior. The criterion we use for the evaluation of the usability of interface design is the user cognitive load. We present different tools for visualization, simulation and easier analysis of the user model. Because each of the methods and tools presented use only part of the user model, in the end we present methods on how to use the complete user model to correctly describe user behavior. In order to understand such a complex model we need to have a proper visualization tool. The concept of such a visualization tool is presented at the end of this paper.

关键词： visualization

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Increase knowledge visualization and interactivity through interactive web-based dash-board system based on graph-based technique: A framework of interactive dashboard knowledge visualization system for higher education

Increase knowledge visualization and interactivity through i...

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11th World Multi-conference on Systemics, Cybernetics and Informatics, WMSCI 2007, Jointly with the 13th International conference on Information Systems analysis and Synthesis, ISAS 2007

作者： Wan Mohd, Wan Maseri Binti Zain, Jasni Mohd Embong, Abdullah Faculty of Computer System and Software Engineering University College of Engineering and Technology Malaysia

ISBN: (纸本)1934272175

We propose a novel approach of knowledge visualization method by adopting graph-based visualization technique and incorporating Dashboard concept for higher education institutions. Two aspects are emphasized, knowledge visualization and human-machine interaction. The knowledge visualization helps users to analyze the comprehensive characteristics of the students, lecturers and subjects after the clustering process and the interaction enable domain knowledge transfer and the use of the human's perceptual capabilities, thus increases the intelligence of the system. The knowledge visualization is enhanced through the dashboard concept where it provides significant patterns of knowledge on real-world and theoretical modeling which could be called wisdom. The framework consists of the system architecture and design for higher education environment is presented in this paper.

关键词： data mining

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Computer simulation framework for flatfish aquaculture

Computer simulation framework for flatfish aquaculture

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conference on Frontiers in the Convergence of Bioscience and Information Technologies

作者： Ceong, Heetaek Park, Kyehwa Jung, Sungju Chonnam Natl Univ Dept Mobile Software Jeonnam South Korea Sunchon Natl Univ Dept Comp Engn Jeonnam South Korea Chaonan Natl Univ Dept Aqualife Med Jeonnam South Korea

ISBN: (纸本)9780769529998

We propose the simulation framework that is a software framework for minimizing the effort of accessing integrated information from sensing data within aquaculture monitoring system. Simulation framework is composed by filtering and data integration module, state modeling module, data analysis module, data maintenance module, and visualization module.

关键词： Computer simulation Aquaculture Marine animals Medical simulation Filtering data analysis data visualization Computerized monitoring data mining Temperature sensors

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VOS: A new method for visualizing similarities between objects

VOS: A new method for visualizing similarities between objec...

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30th Annual conference of the German-Classification-Society

作者： Van Eck, Nees Jan Waltman, Ludo Erasmus Univ Fac Econ Inst Econ PO Box 1738 NL-3000 DR Rotterdam Netherlands

ISBN: (纸本)9783540709800

We present a new method for visualizing similarities between objects. The method is called VOS, which is an abbreviation for visualization of similarities. The aim of VOS is to provide a low-dimensional visualization in which objects are located in such a way that the distance between any pair of objects reflects their similarity as accurately as possible. Because the standard approach to visualizing similarities between objects is to apply multidimensional scaling, we pay special attention to the relationship between VOS and multidimensional scaling.

关键词： visualization

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