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12th International conference Information Visualisation 2008

作者： Lundblad, Patrik Jern, Mikael Forsell, Camilla Linkoping Univ Dept Sci & Technol Norrkoping Sweden

ISBN: (纸本)9780769532684

This paper demonstrates the synergy of common InfoVis and GeoVis interaction techniques and the logistic application domain demonstrated in the customized Visualize Performance data (VISPER) application. In VISPER multi-dimensional, multi-source, time-varying and geospatial digital information from voyage analysis is represented to facilitate decision-making. Using common InfoVis components for multivariate data together with logistics visualization in a new synergy aids the users in their work examining ship and route performance. An evaluation of the usability was performed to gather insights for future development. The results from the evaluation show that the overall impression of VISPER was highly positive and participants enjoyed using it. Feedback obtained was highly valuable and directly applicable for improvements and further development.

关键词： voyage analysis geovisual analytics visual data exploration and analysis usability evaluation

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visualization of gene combinations

Visualization of gene combinations

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12th International conference Information Visualisation 2008

作者： Tominski, Christian Schumann, Heidrun Univ Rostock Inst Comp Sci D-2500 Rostock 1 Germany

ISBN: (纸本)9780769532684

Advances in the field of microarray technology have attracted a lot of attention in recent years. More and more biological experiments are conducted based on microarrays. The challenge researchers face today is to analyze and understand the collected data. We present a visual approach to support understanding microarray data. In contrast to other visualization techniques, which represent expression of genes, we go one step further and make a switch to combinations of genes. Gene combinations bear more information, and hence, can lead to new hypotheses about the data. However the increased amount of information imposes several challenges to an interactive visualization approach. We propose analytical and visual methods to deal with these challenges.

关键词： information visualization visual analysis microarray data

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Visual and analytical extensions for the table lens

Visual and analytical extensions for the table lens

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conference on visualization and data analysis 2008

作者： John, Mathias Tominski, Christian Schumann, Heidrun Univ Rostock Inst Comp Sci D-18059 Rostock Germany

ISBN: (纸本)9780819469816

Many visualization approaches teach us that ease of use is the key to effective visual data analysis. The Table Lens is an excellent example of a simple, yet expressive visual method that can help in analyzing even larger volumes of data. In this work, we present two extensions of the original Table Lens approach. In particular, we extend the Table Lens by Two-Tone Pseudo Coloring (TTPC) and a hybrid clustering. By integrating TTPC into the Table Lens, we obtain visual representations that can communicate larger volumes of data while still maintaining precision. Secondly, we propose to integrate a data analysis step that implements a hybrid clustering based on self-organizing maps and hierarchical clustering. The analysis step helps to extract and communicate complementary structural information about the data and also serves to drive interactive information drill-down.

关键词： information visualization Two-Tone Pseudo Coloring Table Lens

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analysis of eye-tracking experiments performed on a Tobii t60

Analysis of eye-tracking experiments performed on a Tobii t6...

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conference on visualization and data analysis 2008

作者： Weigle, Chris Banks, David C. Univ Tennessee Oak Ridge Natl Lab Joint Inst Computat Sci Knoxville TN 37996 USA

ISBN: (纸本)9780819469816

Commercial eye-gaze trackers have the potential to be an important tool for quantifying the benefits of new visualization techniques. The expense of such trackers has made their use relatively infrequent in visualization studies. As such, it is difficult for researchers to compare multiple devices - obtaining several demonstration models is impractical in cost and time, and quantitative measures from real-world use are not readily available. In this paper, we present a sample protocol to determine the accuracy of a gaze-tacking device.

关键词： user studies usability eye-gaze tracking

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A tourism information analysis tool for mobile devices

A tourism information analysis tool for mobile devices

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12th International conference Information Visualisation 2008

作者： Viana Pinheiro, Sergio Clayton Meiguins, Bianchi Serique Goncalves Meiguins, Aruanda Simoes Almeida, Leandro Hernandez Fed Univ Para Programa Posgrad Ciencia Computacao BR-66059 Belem Para Brazil Centro Univ Para CESUPA Area Ciencias Tecnol Belem Para Brazil

ISBN: (纸本)9780769532684

This paper presents a data analysis tool for mobile devices. Coordinated views are used to enhance the user's perception over data and diminish the difficulties caused by the lack of resources these mobiles present, specially when it comes to display size. The tool was totally developed in JavaME, what guarantees portability, scalability and code reuse. It presents two visualization techniques, implemented and coordinated with filters, scatterplot graph with georeferenced maps and treemap. Besides, preliminary usability tests were performed with users.

关键词： information visualization coordinated views visualization tools treemap scatterplot mobile devices

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Towards the visualization of multi- Dimensional stochastic distribution data

Towards the visualization of multi- Dimensional stochastic d...

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Computer Graphics and visualization 2008 and Gaming 2008: Design for Engaging Experience and Social Interaction 2008, MCCSIS'08 - IADIS Multi conference on Computer Science and Information Systems

作者： Potter, Kristin Krüger, Jens Johnson, Christopher Scientific Computing and Imaging Institute University of Utah United States

ISBN: (纸本)9789728924638

Uncertainty information is an important characteristic associated with much of the data scientists encounter. While such uncertainty information is often available, incorporating uncertainty into visualization techniques has proved challenging. This paper presents novel visualization approaches for a class of uncertainty data that is generated from the sensitivity analysis of electrical conductivity within a model of bioelectric fields from the heart. The data can be characterized as a set of probability density functions (PDFs) defined across a triangular mesh;however, we are also interested in the relationship between input and output parameters of the sensitivity analysis. This increases the complexity of the data set and motivates a visualization approach that provides for exploration of the data set. © 2008 IADIS.

关键词： Probability density function

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VIP: visualization of Integrated Proteomics data

VIP: Visualization of Integrated Proteomics Data

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8th IEEE International conference on Bioinformatics and Bioengineering

作者： Giannopoulou, Eugenia G. Lepouras, George Manolakos, Elias S. Univ Peloponnese Dept Comp Sci & Technol Tripolis 22100 Greece Univ Athens Dept Informat & Telecommun GR-15784 Athens Greece

ISBN: (纸本)9781424428441

The post-genomic era is characterized by the rapid data accumulation leading to unwieldy and large volumes of biological data. The proteomics results (large sets of identified proteins or peptides) that originate from several workflow steps, play an important role in the analysis of a proteomics experiment. As a result, the area of high-throughput proteomics created new visualization challenges in interpreting large-scale datasets. We present VIP, an interactive visualization tool for proteomics data, which integrates protein or peptide features emanating at every step of the proteomics analysis and combines them visually in synthetic maps. Our novel tool offers the flexibility to choose any desired features according to the analysis objectives, examine simultaneously more than one maps and interact with the visualization by querying and filtering the results. The synthetic maps visualization aims not only at summarizing proteomics experiments in a unified manner for both 2DE-MS and LC-MS based analyses, but also at providing a quick and combined overview of protein/peptide features, thus facilitating the data analysis and interpretation.

关键词： visualization

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Visualizing time-dependent data in multivariate hierarchic plots design and evaluation of an economic application

Visualizing time-dependent data in multivariate hierarchic p...

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12th International conference Information Visualisation 2008

作者： Tekusova, Tatiana Schreck, Tobias Fraunhofer Comp Graph Inst Darmstadt Germany Tech Univ Darmstadt Darmstadt Germany

ISBN: (纸本)9780769532684

For successfully competing in a modem economy, large amounts of hierarchic time-dependent data need to be analyzed. As an example, one could consider the geographic composition of inflation in the European Union, or the revenue by product (sub) categories of a firm in the last month. Analysts wish to interpret the structure of the data not only at a single point in time, but examine the changes in the data categories through time. The analysts may need to consider additional dimensions to composition and time, such as the growth rate or profit rate. To reflect such analytic requirements, we have developed an interactive visualization of multi-dimensional, structured data taking the time dimension into account. The data are displayed in a three dimensional hierarchic circular or column plot. The time-dimension of the data is represented by animation. Our system provides interactive tools for the visual data analysis and variable set-up of the data display. For better orientation in the data space, we have enhanced the visualization with smooth transitions between different data selections in case of 3D hierarchic plots. The techniques presented can be applied to various data domains. A user study using European inflation data has shown the usefulness for effective economic analysis.

关键词： Economic analysis

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Advanced interactive medical visualization on the GPU

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JOURNAL OF PARALLEL AND DISTRIBUTED COMPUTING 2008年第10期68卷 1319-1328页

作者： Tatarchuk, Natalya Shopf, Jeremy DeCoro, Christopher Princeton Univ Princeton NJ 08544 USA

Interactive visual analysis of a patient's anatomy by means of computer-generated 3D imagery is crucial for diagnosis, pre-operative planning, and surgical training. The task of visualization is no longer limited to producing images at interactive rates, but also includes the guided extraction of significant features to assist the user in the data exploration process. An effective visualization module has to perform a problem-specific abstraction of the dataset, leading to a more compact and hence more efficient visual representation. Moreover, many medical applications, such as surgical training simulators and pre-operative planning for plastic and reconstructive surgery, require the visualization of datasets that are dynamically modified or even generated by a physics-based simulation engine. In this paper we present a set of approaches that allow interactive exploration of medical datasets in real time. Our method combines direct volume rendering via ray-casting with a novel approach for isosurface extraction and re-use directly on graphics processing units (GPUs) in a single framework. The isosurface extraction technique takes advantage of the recently introduced Microsoft DirectX (R) 10 pipeline for dynamic surface extraction in real time using geometry shaders. This surface is constructed in polygonal form and can be directly used post-extraction for collision detection, rendering. and optimization. The resulting polygonal surface can also be analyzed for geometric properties, such as feature area, volume and size deviation, which is crucial for semi-automatic tumor analysis as used, for example, in colonoscopy. Additionally, we have developed a technique for real-time volume data analysis by providing an interactive user interface for designing material properties for organs in the scanned volume. Combining isosurface with direct volume rendering allows visualization of the surface properties as well as the context of tissues surrounding the region and gives

关键词： Isosurface extraction Volume rendering Real-time rendering Medical visualization Isosurface rendering Programmable shaders GPU DirectX10 Geometry shaders Stream-out Marching cubes Marching tetrahedra Ray casting Ray marching Transfer function editing

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Visualize this: Opportunities and challenges for the travel survey community - A resource paper 8

Visualize this: Opportunities and challenges for the travel ...

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8th International conference on Survey Methods in Transport, ISCT 2008

作者： Lawson, Catherine T. University at Albany AlbanyNY12222 United States

New computer-assisted techniques for visualizing data are evolving in a number of areas in transportation. For example, in engineering, 3D visualization and micro-simulation techniques are being applied for the identification and evaluation of geometric and operational solutions for improving visually impaired pedestrian access to roundabouts and channelized turn lanes. For planning, visualization is being used for corridor analysis. data visualization is being used as a tool for improving decision making within transit agencies, as well as a tool for understanding truck trip generation on highways. Many of these new techniques take advantage of archived intelligent transportation systems (ITS) data. Examples of other innovative data sources include: global positioning systems (GPS);geographic information systems (GIS);computer-aided design (CAD);and a variety of visualization tools available for use with travel survey data. As the various techniques and software applications move forward, consideration needs to be made on how the "lessons learned" from these applications can facilitate the use of data visualization techniques for travel survey data analysis and decision-making. © 2008 8th International conference on Survey Methods in Transport, ISCT 2008. All rights reserved.

关键词： data visualization

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