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Experiment management with metadata-based integration for collaborative scientific research

Experiment management with metadata-based integration for co...

引用

22nd International Conference on data Engineering, ICDE '06

作者： Wang, Fusheng Liu, Peiya Azar, Fred Pearson, John Madlmayr, Gerald Integrated Data Systems Department Siemens Corporate Research Imaging and Visualization Department Siemens Corporate Research Government Programs Siemens Corporate Research Department of Computer Science Johannes Kepler University Linz Siemens Corporate Research

ISBN: (纸本)0769525709

Scientific research in many fields is increasingly a collaborative effort across multiple institutions and disciplines. Scientific researchers need not only an effective system to manage their data, results, and the experiments that generate the results, but also a platform to integrate, share and search these across multiple institutions. Therefore, researchers are able to reuse experiments, pool expertise and validate approaches. In this paper, we present Sci-Port, a system of experiment management and integration for collaborative scientific research. SciPort's architecture uses i) a general transformation-based data model to represent and link experiment processes;ii) hierarchical data classification across multiple institutions according to research programs' goals and organization;iii) metadatacentric representation that concisely captures the context of experiments;and iv) virtual data integration through centralized metadata integration. The system is built for open source, and the metadata-based representation and integration provides a unified framework and tool set to manage and share experiments for scientific research communities. © 2006 IEEE.

关键词： Metadata

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A Foveal Inset for Large Display Environments

A Foveal Inset for Large Display Environments

引用

IEEE Annual International Symposium Virtual Reality

作者： B.A. Ahlborn O. Kreylos B. Hamann O. Staadt Department of Computer Science Institute for Data Analysis and Visualization University of California USA

We introduce a system that adds a foveal inset to large-scale projection displays. The effective resolution of the foveal inset projection is higher than the original display resolution, allowing the user to see more details and finer features in large data sets. The foveal inset is generated by projecting a high-resolution image onto a mirror mounted on a pan-tilt unit (PTU) that is controlled by the user with a laser pointer. Our implementation is based on Chromium and supports many OpenGL applications without modifications.

关键词： Computer displays Tiles Mirrors Calibration Cameras Chromium Hardware Graphical user interfaces Costs Linux

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Discrete sibson interpolation

Discrete sibson interpolation

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作者： Park, Sung W. Linsen, Lars Kreylos, Oliver Owens, John D. Hamann, Bernd IEEE Department of Computer Science University of California Davis CA 95616 Department of Mathematics and Computer Science Ernst-Maritz-Arndt-Universität Greifswald D-17487 Greifswald Germany University of California Davis Department of Mathematics and Computer Science Emst-Moritz-Amdt-Universität Greifswald Germany Department of Electrical and Computer Engineering University of California Davis Davis Institute of Data Analysis and Visualization University of California Davis Department of Computer Science

Natural neighbor interpolation methods, such as Sibson's method, are well-known schemes for multivariate data fitting and reconstruction. Despite its many desirable properties, Sibson's method is computationally expensive and difficult to implement, especially when applied to higher-dimensional data. The main reason for both problems is the method's implementation based on a Voronol diagram of all data points. We describe a discrete approach to evaluating Sibson's interpolant on a regular grid, based solely on finding nearest neighbors and rendering and blending d-dimensional spheres. Our approach does not require us to construct an explicit Voronoi diagram, is easily implemented using commodity three-dimensional graphics hardware, leads to a significant speed increase compared to traditional approaches, and generalizes easily to higher dimensions. For large scattered data sets, we achieve two dimensional (2D) interpolation at interactive rates and 3D interpolation (3D) with computation times of a few seconds. © 2006 IEEE.

关键词： Interpolation

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Segmenting Point Sets

Segmenting Point Sets

引用

International Conference on Shape Modeling and Applications

作者： I. Yamazaki V. Natarajan Zhaojun Bai B. Hamann Department of Computer Science University of California Davis CA USA Institute for Data Analysis and Visualization (IDAV) University of California Davis CA USA

Extracting features from point sets is becoming increasingly important for purposes like model classification, matching, and exploration. We introduce a technique for segmenting a point-sampled surface into distinct features without explicit construction of a mesh or other surface representation. Our approach achieves computational efficiency through a three-phase segmentation process. The first phase of the process uses a topo-logical approach to define features and coarsens the input, resulting in a set of supernodes, each one representing a collection of input points. A graph cut is employed in the second phase to bisect the set of supernodes. Similarity between supernodes is computed as a weighted combination of geodesic distances and connectivity. Repeated application of the graph cut results in a hierarchical segmentation of the point input. In the last phase, a segmentation of the original point set is constructed by refining the segmentation of the supernodes based on their associated feature sizes. We apply our segmentation algorithm on laser-scanned models to evaluate its ability to capture geometric features in complex data sets

关键词： Shape Feature extraction Spectral analysis data analysis data visualization Computer science data mining Computational efficiency Geophysics computing Laser beam cutting

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Experiment Management with Metadata-based Integration for Collaborative Scientific Research

Experiment Management with Metadata-based Integration for Co...

引用

International Conference on data Engineering

作者： Fusheng Wang Peiya Liu J. Pearson F. Azar G. Madlmayr Integrated Data Systems Department Siemens Corporate Research Inc. USA Siemens Corporate Research Inc. USA Imaging and Visualization Department Siemens Corporate Research Inc. USA Department of Computer Science Johannes Kepler University of Linz Austria

ISBN: (纸本)9781424429448

Scientific research in many fields is increasingly a collaborative effort across multiple institutions and disciplines. Scientific researchers need not only an effective system to manage their data, results, and the experiments that generate the results, but also a platform to integrate, share and search these across multiple institutions. Therefore, researchers are able to reuse experiments, pool expertise and validate approaches. In this paper, we present Sci- Port, a system of experiment management and integration for collaborative scientific research. SciPort’s architecture uses i) a general transformation-based data model to represent and link experiment processes; ii) hierarchical data classification across multiple institutions according to research programs’ goals and organization; iii) metadatacentric representation that concisely captures the context of experiments; and iv) virtual data integration through centralized metadata integration. The system is built for open source, and the metadata-based representation and integration provides a unified framework and tool set to manage and share experiments for scientific research communities.

关键词： Collaboration Collaborative work Instruments Information retrieval data systems Government data visualization Computer science data models Large scale integration

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Marching diamonds for unstructured meshes

Marching diamonds for unstructured meshes

引用

VIS 05: IEEE visualization 2005, Proceedings

作者： Anderson, John C. Bennett, Janine C. Joy, Kenneth I. Institute for Data Analysis and Visualization Computer Science Department University of California Davis

ISBN: (纸本)0780394623

We present a higher-order approach to the extraction of isosurfaces from unstructured meshes. Existing methods use linear interpolation along each mesh edge to find isosurface intersections. In contrast, our method determines intersections by performing barycentric interpolation over diamonds formed by the tetrahedra incident to each edge. Our method produces smoother, more accurate isosurfaces. Additionally, interpolating over diamonds, rather than linearly interpolating edge endpoints, enables us to identify up to two isosurface intersections per edge. This paper details how our new technique extracts isopoints, and presents a simple connection strategy for forming a triangle mesh isosurface. © 2005 IEEE.

关键词： Feature extraction

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Real time change detection and alerts from highway traffic data 05

Real time change detection and alerts from highway traffic d...

引用

ACM/IEEE 2005 Supercomputing Conference, SC'05

作者： Grossman, Robert Sabala, Michal Aanand, Anushka Eick, Steve Wilkinson, Leland Zhang, Pei Chaves, John Vejcik, Steve Dillenburg, John Nelson, Peter Rorem, Doug Alimohideen, Javid Leigh, Jason Papka, Mike Stevens, Rick National Center for Data Mining University of Illinois Chicago Open Data Research Department of Computer Science University of Illinois Chicago Electronic Visualization Laboratory University of Illinois Chicago Argonne National Laboratory

ISBN: (纸本)1595930612

We developed a testbed containing: real time data from over 830 highway traffic sensors in the Chicago region, data about weather, and text data about events that might affect traffic. The goal was to detect in real time interesting changes in traffic conditions. Given the size and complexity of the data, we choose to build a large number of separate baseline models. We built a separate baseline for each hour in the day, for each day in the week, and for every 2 or 3 traffic sensors, resulting in over 42,000 separate baseline models. We also built a baseline engine to build the necessary baselines automatically. We modified an open source scoring engine to process in real time each new sensor reading, update the appropriate feature vectors, score the updated feature vectors using the baseline models, and send out real time alerts when deviations from the baselines were detected. © 2005 IEEE.

关键词： Real time systems

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Feature tracking in VR for cumulus cloud life-cycle studies

Feature tracking in VR for cumulus cloud life-cycle studies

引用

Joint 9th International Workshop on Immersive Projection Technology and the 11th Eurographics Symposium on Virtual Environments, IPT/EGVE 2005

作者： Griffith, E.J. Post, F.H. Koutek, M. Heus, T. Jonker, H.J.J. Data Visualization Group Faculty of Electrical Engineering Mathematics and Computer Science Netherlands Department of Multi-Scale Physics Faculty of Applied Sciences Delft University of Technology Netherlands

ISBN: (纸本)3905673215

Feature tracking in large data sets is traditionally an off-line, batch processing operation while virtual reality typically focuses on highly interactive tasks and applications. This paper presents an approach that uses a combination of off-line preprocessing and interactive visualization in VR to simplify and speed up the identification of interesting features for further study. We couch the discussion in terms of our collaborative research on using virtual reality for cumulus cloud life-cycle studies, where selecting suitable clouds for study is simple for the skilled observer but difficult to formalize. The preprocessing involves identifying individual clouds within the data set through a 4D connected components algorithm, and then saving isosurface, bounding box, and volume information. This information is then interactively visualized in our VR Cloud Explorer with various tools and information displays to identify the most interesting clouds. In a small pilot study, reasonable performance, both in the preprocessing phase and the visualization phase, has been measured. © The Eurographics Association 2005.

关键词： Virtual reality

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Marching diamonds for unstructured meshes

Marching diamonds for unstructured meshes

引用

IEEE Conference on visualization

作者： J.C. Anderson J.C. Bennett K.I. Joy Institute for Data Analysis and Visualization Computer Science Department University of California Davis USA

We present a higher-order approach to the extraction of isosurfaces from unstructured meshes. Existing methods use linear interpolation along each mesh edge to find isosurface intersections. In contrast, our method determines intersections by performing barycentric interpolation over diamonds formed by the tetrahedra incident to each edge. Our method produces smoother, more accurate isosurfaces. Additionally, interpolating over diamonds, rather than linearly interpolating edge endpoints. enables us to identify up to two isosurface intersections per edge. This paper details how our new technique extracts isopoints, and presents a simple connection strategy for forming a triangle mesh isosurface.

关键词： Isosurfaces Interpolation data analysis data visualization Computer science Aircraft data mining Chromium Computer graphics Surface cracks

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Evolutionary morphing

Evolutionary morphing

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VIS 05: IEEE visualization 2005, Proceedings

作者： Wiley, David F. Amenta, Nina Alcantara, Dan A. Ghosh, Deboshmita Kil, Yong J. Delson, Eric Harcourt-Smith, Will Rohlf, F. James John, Katherine St. Hamann, Bernd Institute for Data Analysis and Visualization Department of Computer Science University of California Davis American Museum of Natural History Lehman College City University of New York Department of Ecology and Evolution State University of New York Stony Brook

ISBN: (纸本)0780394623

We introduce a technique to visualize the gradual evolutionary change of the shapes of living things as a morph between known three-dimensional shapes. Given geometric computer models of anatomical shapes for some collection of specimens - here the skulls of the some of the extant members of a family of monkeys - an evolutionary tree for the group implies a hypothesis about the way in which the shape changed through time. We use a statistical model which expresses the value of some continuous variable at an internal point in the tree as a weighted average of the values at the leaves. The framework of geometric morphometrics can then be used to define a shape-space, based on the correspondences of landmark points on the surfaces, within which these weighted averages can be realized as actual surfaces. Our software provides tools for performing and visualizing such an analysis in three dimensions. Beginning with laser range scans of crania, we use our landmark editor to interactively place landmark points on the surface. We use these to compute a "tree-morph" that smoothly interpolates the shapes across the tree. Each intermediate shape in the morph is a linear combination of all of the input surfaces. We create a surface model for an intermediate shape by warping all the input meshes towards the correct shape and then blending them together. To do the blending, we compute a weighted average of their associated trivariate distance functions and then extract a surface from the resulting function. We implement this idea using the squared distance function, rather than the usual signed distance function, in a novel way.

关键词： Computer graphics

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