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Angiogram visualization and total velocity blood flow assessment based on intensity information analysis of OCT data

Angiogram visualization and total velocity blood flow assess...

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conference on Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVI/SPIE Photonics West Symposia

作者： Ruminski, Daniel Bukowska, Danuta Gorczynska, Iwona Szkulmowski, Maciej Wojtkowski, Maciej Nicholas Copernicus Univ Inst Phys PL-87100 Torun Poland

ISBN: (纸本)9780819488565

We propose two independent OCT data processing methods allowing visualization and analysis of the blood flow. These methods utilize variations in the OCT intensity images caused by flowing blood. The first method calculates standard deviation of intensity to generate retinal OCT angiograms. We present algorithm of this method and results of application for visualization of the microvasculature in the macular area of the human eye in vivo. The second method calculates cross power spectra of the volumetric intensity images to assess blood flow velocity in three dimensions. Validation of this method for OCT imaging was performed in a flow phantom.

关键词： Optical Coherence Tomography spectral/Fourier domain OCT blood flow retinal microvasculature parafoveal micro-capillaries network

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analysis of maritime traffic off the coast of Portugal 1st

Analysis of maritime traffic off the coast of Portugal

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1st International conference on Maritime Technology and Engineering, MARTECH 2011

作者： Silveira, P. Teixeira, A.P. Guedes Soares, C. Instituto Superior Técnico Technical University of Lisbon Portugal

ISBN: (纸本)9780415621465

This paper aims at studying the maritime traffic off the coast of Portugal. This study is based on AIS (Automatic Identification Scheme) data, which is registered and maintained by the Portuguese coastal VTS control centre (CCTMC), referring to the time period between the 9th July and the 9th August 2008. The decoding of AIS messages is briefly described and computer programs are developed for the analysis and visualization of the AIS information available for the present study. From the analysis of the AIS information, the maritime traffic off the coast of Portugal is characterised and a statistical analysis of the ships in the Traffic Separation Schemes (TSS) is provided. An algorithm is developed to assess the risk profile and the relative importance of routes associated with ports. © 2012 Taylor & Francis Group, London.

关键词： Automation

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Enhancements in scale 6.1

Enhancements in scale 6.1

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International conference on the Physics of Reactors 2012: Advances in Reactor Physics, PHYSOR 2012

作者： Rearden, B.T. Petrie, L.M. Peplow, D.E. Jessee, M.A. Wiarda, D. Williams, M.L. Lefebvre, R.A. Lefebvre, J.P. Gauld, I.C. Goluoglu, S. Oak Ridge National Laboratory Bldg. 5700 P.O. Box 2008 Oak Ridge TN 37831-6170 United States

ISBN: (纸本)9781622763894

The SCALE code system developed at Oak Ridge National Laboratory provides a comprehensive, verified and validated, user-friendly tool set for criticality safety, reactor physics, radiation shielding, and sensitivity and uncertainty analysis. For more than 30 years, regulators, licensees, and research institutions around the world have used SCALE for nuclear safety analysis and design. SCALE provides a "plug-and-play" framework with 89 computational modules, including three deterministic and three Monte Carlo radiation transport solvers that are selected based on the desired solution. SCALE'S graphical user interfaces assist with accurate system modeling, visualization, and convenient access to desired results. SCALE 6.1 builds on the existing capabilities and ease-of-use of SCALE and provides several new features such as enhanced lattice physics capabilities and multigroup Monte Carlo depletion, improved options and capabilities for sensitivity and uncertainty analysis calculations, improved flexibility in shielding and criticality accident alarm system calculations with automated variance reduction, and new options for the definition of group structures for depletion calculations. The SCALE 6.1 development team has focused on improved robustness via substantial additional regression testing and verification for new and existing features, providing improved performance relative to SCALE 6.0, especially in reactor physics calculations and in the nuclear data used for source term characterization and shielding calculations.

关键词： Graphical user interfaces

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visualization analysis on Research Hotspot about International Sports Biomechanics

Visualization Analysis on Research Hotspot about Internation...

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The Xi’an 2012 International conference on Sport Science and Physical Education(ICSSPE 2012)

作者： Jun-jie WANG Pei-yong WANG Jing-min LIU Department of Physical Education Tsinghua University

Objective:To analyze the research hotspot of international sports biomechanics within the last 5 years and further provides some valuable conclusions and findings to researchers,manager, decision-makers,and other ***:By adopting SCIE,SSCI,and A&HCI in the Web of Science as the data source,the author used the CiteSpaceⅡsoftware to make visual analysis for 520 sports biomechanics literatures published from 2008 to 2012 and their references,and further demonstrate the results by ***:By analyzing the node types,such as the country/keyword/term/cited reference with the CiteSpaceⅡ,the results show that the research on sports biomechanics is mainly in developed countries focusing on biomechanics,neuromuscular control,injury prevention and recovery,and long-term neurologic outcomes by ***:Keeping track of the research hotspots and significant changes will contribute to the development of sports biomechanics.

关键词： Sports Biomechanics Scientometrics visualization CiteSpaceⅡ

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Wide-area, Web-based Mobility analysis Using Probe data

Wide-area, Web-based Mobility Analysis Using Probe Data

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International IEEE conference on Intelligent Transportation Systems

作者： Michael L. Pack University of Maryland Center for Advanced Transportation Technology Laboratory

ISBN: (纸本)9781467330640

This paper describes a web-based visual analytics monitoring system for identifying major bottlenecks, reporting on travel time reliability, and displaying other congestion measures using private sector vehicle probe data fused with agency incident/event data where available. This system represents an exponential leap forward in capabilities to report on system performance in terms of speed and ease of access, usability, and overall data availability. This paper demonstrates how states are using the system to justify construction projects, demonstrate the benefits of transportation projects, identify areas for improvement, and analyze travel times using a variety of data sources, with an emphasis on vehicle probe data. The underlying system includes probe data from as early as 2008 through today that is being used to analyze trends from year-to-year, month-to-month, and day-to-day. The resulting suite of tools provide significant new capabilities to researchers and analysts that will likely fuel additional research.

关键词： Probes Reliability Measurement Roads data visualization Vehicles

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Wheat Three-Dimensional Reconstruction and visualization System

Wheat Three-Dimensional Reconstruction and Visualization Sys...

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Computer and Computing Technologies in Agriculture VI——6th IFIP WG 5.14 International conference(CCTA2012) Part I

作者： Hao Zhang Qiang Wang Hui Zhang Yali Ji Xinming Ma Lei Xi Information and Management Science College Henan Agricultural University Agronomy College Henan Agricultural University Henan Agricultural University

ISBN: (纸本)9783642361234

The study object is wheatThrough the observation and analysis on the morphological structure of wheat plant,the concepts of macrostate,substate and microstate are put forward,the wheat growth mechanism model is established,and thus the description and control of wheat morphogenesis process could be *** on the branch structure characteristics of plant,the wheat morphological data model based on axis structure is proposed to realize the structural storage of plant topological structure and organ morphological feature *** this basis,based on the thought of "growth model-morphological feature model-geometric modeling-display model",the technical framework of wheat form visualization is established and on the VC++ platform,the virtual wheat growth system is built with OpenGLThe running result of the system shows that wheat morphological feature can be well simulated with the system to realize the virtual display of the growth process in the individual growth period of wheat.

关键词： Wheat Plant morphological Virtual visualization

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IEEE TRANSACTIONS ON visualization AND COMPUTER GRAPHICS 2011年第12期17卷 2459-2468页

作者： Paiva, Jose Gustavo S. Florian-Cruz, Laura Pedrini, Helio Telles, Guilherme P. Minghim, Rosane Univ Fed Uberlandia Uberlandia MG Brazil Univ Sao Paulo ICMC BR-05508 Sao Paulo Brazil Univ Estadual Campinas IC Campinas SP Brazil

An alternative form to multidimensional projections for the visual analysis of data represented in multidimensional spaces is the deployment of similarity trees, such as Neighbor Joining trees. They organize data objects on the visual plane emphasizing their levels of similarity with high capability of detecting and separating groups and subgroups of objects. Besides this similarity-based hierarchical data organization, some of their advantages include the ability to decrease point clutter;high precision;and a consistent view of the data set during focusing, offering a very intuitive way to view the general structure of the data set as well as to drill down to groups and subgroups of interest. Disadvantages of similarity trees based on neighbor joining strategies include their computational cost and the presence of virtual nodes that utilize too much of the visual space. This paper presents a highly improved version of the similarity tree technique. The improvements in the technique are given by two procedures. The first is a strategy that replaces virtual nodes by promoting real leaf nodes to their place, saving large portions of space in the display and maintaining the expressiveness and precision of the technique. The second improvement is an implementation that significantly accelerates the algorithm, impacting its use for larger data sets. We also illustrate the applicability of the technique in visual data mining, showing its advantages to support visual classification of data sets, with special attention to the case of image classification. We demonstrate the capabilities of the tree for analysis and iterative manipulation and employ those capabilities to support evolving to a satisfactory data organization and classification.

关键词： Similarity Trees Multidimensional Projections Image Classification

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Latent State visualization of Neural Firing Rates

Latent State Visualization of Neural Firing Rates

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5th International IEEE Engineering-in-Medicine-and-Biology-Society (EMBS) conference on Neural Engineering (NER)

作者： Brockmeier, Austin J. Kriminger, Evan G. Sanchez, Justin C. Principe, Jose C. Univ Florida Dept Elect & Comp Engn POB 116130 NEB 486Bldg 33 Gainesville FL 32611 USA Univ Miami Dept Biomed Engn Coral Gables FL 33146 USA

ISBN: (纸本)9781424441419

Visualizing the collective modulation of multiple neurons during a known behavioral task is useful for exploratory analysis, but handling the large dimensionality of neural recordings is challenging. We further investigate using static dimensionality reduction techniques on neural firing rate data during an arm movement task. This lower-dimensional representation of the data is able to capture the neural states corresponding to different portions of the behavior task. A simulation using a dynamical model lends credence to the ability of the technique to generate a representation that preserves underlying dynamics of the model. This technique is a straightforward way to extract a useful visualization for neural recordings during brain-machine interface tasks. Meaningful visualization confirms underlying structure in data, which can be captured with parametric modeling.

关键词： data visualization Image color analysis Joints Neurons Nonlinear dynamical systems Principal component analysis Trajectory arm movement task biomechanics biomedical measurement brain-computer interfaces brain-machine interface tasks latent state visualization medical computing neural firing rate data neural firing rates neural recordings neural states neurophysiology static dimensionality reduction techniques

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visualization of Measured data for Wireless Devices BluesenseAD

Visualization of Measured Data for Wireless Devices Bluesens...

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5th Kuala Lumpur International conference on Biomedical Engineering (BIOMED 2011)

作者： Krejcar, O. Janckulik, D. Kelnar, M. VSB TU Ostrava FEECS Dept Measurement & Control Ostrava Czech Republic

ISBN: (纸本)9783642217289

This paper deals with the visualization of data measured by the wireless Bluetooth module BluesenseAD. The module measures the input voltage signal by an A / D converter and sends it via bluetooth to a computer for processing. BluesenseAD can be used for measurement in many applications ranging from simple measurement of voltage, temperature up to the ECG curves. data visualization is proceeded in the form of timing chart display, and more so, it can be saved and thus available for any subsequent detailed analysis. The user interface provides access to basic utilities for configuring the serial link, parameters of the measured signals display, readout and control instrument for direct communication. The whole program is developed in C # development environment in Microsoft Visual Studio 2008.

关键词： Bluetooth visualization A/D converter C#

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Visualizing the Evolution of Social Networks 1

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15th Portuguese conference on Artificial Intelligence (EPIA 2011)

作者： Oliveira, Marcia Gama, Joao Univ Porto Fac Econ Rua Campo Alegre 823 P-4100 Oporto Portugal

ISBN: (数字)9783642247699

ISBN: (纸本)9783642247682

In recent years we witnessed an impressive advance in the social networks field, which became a "hot" topic and a focus of considerable attention. Also, the development of methods that focus on the analysis and understanding of the evolution of data are gaining momentum. In this paper we present an approach to visualize the evolution of dynamic social networks by using Tucker decomposition and the concept of trajectory. Our visualization strategy is based on trajectories of network's actors in a bidimensional space that preserves its structural properties. Furthermore, this approach can be used to identify similar actors by comparing the shape and position of the trajectories. To illustrate the proposed approach we conduct a case study using a set of temporal friendship networks.

关键词： data Evolution data visualization Social Networks Trajectories Tucker3 model

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