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Seeing sound: Real-time sound visualisation in visual feedback loops used for training musicians

Seeing sound: Real-time sound visualisation in visual feedba...

引用

9th International conference on Information Visualisation

作者： Ferguson, S Moere, AV Cabrera, D Univ Sydney Sch Architecture Design Sci & Planning Sydney NSW 2006 Australia

ISBN: (纸本)0769523978

Musicians in training need to understand the sound they are producing in order to improve its deficient aspects. Verbal feedback from musical masters is the usual method used for attaining this understanding. However, using real time sound visualisation as a complementary form of feedback allows the large amounts of data typical of real-time acoustic analysis to be employed within training. This improves the efficiency of the feedback loop normally present within musical training and pedagogy. The implementation and effect of such a system is discussed.

关键词： sound visualization real-time visualization

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Detrended Fluctuation analysis: A suitable long-term measure of HRV signals in children with sleep disordered breathing

Detrended Fluctuation Analysis: A suitable long-term measure...

引用

27th Annual International conference of the IEEE-Engineering-in-Medicine-and-Biology-Society

作者： Krishnam, R. Nazeran, H. Chadapalli, S. Haltiwanger, E. Pamula, Y. Univ Texas Dept Elect & Comp Engn El Paso TX 79968 USA

ISBN: (纸本)0780387406

On the body surface the electric field generated by the cardiac muscles consists of electric potential maxima and minima that increase and decrease during each cardiac cycle. The recording of these electric potentials as a function of time is called electrocardiography, and the resulting signal is called the electrocardiogram (ECG). The ECG signal is used extensively as a low cost diagnostic tool to provide information concerning the heart's state of health. Reliable and accurate detection of the QRS complex and R wave peak in ECG signals is essential in computer-based ECG analysis. In this paper we evaluate the significance of Detrended Fluctuation analysis (DFA) for studying heart rate variability in children with sleep disordered breathing. An Enhanced Hilbert Transform (EHT) algorithm was used to derive the Heart Rate Variability (HRV) signal. We compare the DFA values with Approximate Entropy and Poincari Plots of HRV signals as these are very useful in characterization and visualization of HRV data. Our data demonstrated differences in DFA parameters between periods of normal and abnormal breathing and also between sleep stages. These results suggest that DFA is suitable for the long-term analysis of non-stationary time series such as HRV signals and may also be applied in the detection of sleep disordered breathing.

关键词： Detrended Fluctuation analysis (DFA) sleep apnea Heart Rate Variability (HRV) biomedical signal processing

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Multiresolution surface reconstruction from scattered data based on hybrid meshes

Multiresolution surface reconstruction from scattered data b...

引用

5th IASTED International conference on visualization, Imaging, and Image Processing

作者： Keller, P Bertram, M TU Kaiserslautern Kaiserslautern Germany

ISBN: (纸本)0889865280

We present a novel technique to extract a multiresolution surface representation from a dense set of unorganized points within three dimensional space. Without utilization of additional connectivity or topological information our procedure is able to efficiently produce a precise and topologicaly correct reconstruction of the underlying model. Based on a hierarchical spatial partitioning scheme and regular and irregular mesh refinement techniques we obtain a hierarchical quadrilateral mesh datastructure which is known as Hybrid Mesh (HM). We start by constructing a simple quad-mesh whose faces aggregate the surface of the initial bounding voxel encapsulating the entire point cloud. Through the process of voxel refinement we simultaneously perform a combined regular-irregular mesh refinement whereas the considered quad-mesh is adapted to wrap the remaining non-empty subvoxels. We project the mesh vertices on planes obtained by principal component analysis (PCA) for each voxel. We provide numerical examples for reconstructions obtained by our method.

关键词： geometric modeling multiresolution surface reconstruction hybrid meshes

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Virtual reality for 3D visualization in a statics course

Virtual reality for 3D visualization in a statics course

引用

2005 ASEE Annual conference and Exposition: The Changing Landscape of Engineering and Technology Education in a Global World

作者： Johnson, Peter E. Will, Jeffrey D. Graunke, Christopher R. Department of Mechanical Engineering Valparaiso University United States Department of Electrical and Computer Engineering Valparaiso University United States

Work done to study subjects in a statics class taught at Valparaiso University as to the development of the ability of students to visualize in 3D was discussed. Four different media were explored, from paper-and-pencil to a fully immersive virtual reality experience. Wide-ranging data in the course was collected and its analysis was presented. A framework for analyzing virtual reality media for applications in education was included. Special effort was directed towards analyzing the cost to benefit ratio of using different teaching technologies.

关键词： Engineering education

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The visualization platform of virtual prototype for locomotive

The visualization platform of virtual prototype for locomoti...

引用

Asia Simulation conference/6th International conference on System Simulation and Scientific Computing

作者： Zou, YS Ding, GF Zhang, WH Gao, ZX He, Y SW Jiaotong Univ Adv Design & Mfg Technol Res Inst Chengdu 610031 Peoples R China

ISBN: (纸本)7506278413

analysis of multi-body system dynamics is the core content of Virtual Prototyping(VP) of mechanical system. Locomotive can be described as a multi-body system, here presents visualized VP developing platform. The virtual model was obtained from CAD system like CAXA, and the attributes of inertia, mass, etc., were extracted from features, parts and assemblies of CAD environment. The model with uniform format, which includes geometrical data and attribute data, was transmitted into the visualized platform of VP and was mapped into the topology structure of multi-body system of locomotive, in which the dynamics computing equations were constructed and the result was resolved and visualized. All of these were given in integrated visualized VP system named VPMS. A freight car model is built for testifying the system, which obeys the theory mentioned above. The simulating result shows that the platform is satisfying for the visualization of modeling and dynamics computation.

关键词： Virtual Prototype visualization locomotive multi-body system topology

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MAPVIS:: A map-projection based tool for visualizing scalar and vectorial information lying on spheroidal surfaces

MAPVIS:: A map-projection based tool for visualizing scalar ...

引用

9th International conference on Information Visualisation

作者： Rekik, W Béréziat, D Dubuisson, S Univ Paris 06 Lab Informat F-75015 Paris France

ISBN: (纸本)0769523978

In this article, we present a novel fast algorithm dedicated to the visualization of scalar and vectorial information lying on elliptical surfaces. As the geometry of the data is simple and not relevant, and inside structures are meaningless, standard visualization methods appear to be not well adapted to our context. Our algorithm is based on map projections, good candidates to unroll elliptical surface around a region of interest, without being computationally prohibitive. It has the merit to project, on a 2D cartographic reference, different views of scalar as well as, vectorial 3D information lying on the surface. We display results for synthetic and cell wall simulations data.

关键词： Information analysis

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NetViewer: A network traffic visualization and analysis tool 19

NetViewer: A network traffic visualization and analysis tool

引用

19th Large Installation System Administration conference, LISA 2005

作者： Kim, Seong Soo Narasimha Reddy, A.L. Texas AandM University United States

The frequent and large-scale network attacks have led to an increased need for developing techniques for analyzing network traffic. If efficient analysis tools were available, it could become possible to detect the attacks, anomalies and to appropriately take action to contain the attacks before they have had time to propagate across the network. This paper describes NetViewer, a network monitoring tool that can simultaneously detect, identify and visualize attacks and anomalous traffic in real-Time by passively monitoring packet headers. NetViewer represents the traffic data as images, enabling the application of image/video processing techniques for the analysis of network traffic. NetViewer is released free to the general public. By employing a freely available visualization tool, the users of NetViewer can comprehend the characteristics of the network traffic observed in the aggregate. NetViewer can be employed to detect and identify network anomalies such as DoS/DDoS attacks, worms and flash crowds. NetViewer can also provide information on traffic distributions over IP address/port number domains, utilization of link capacity and effectiveness of Quality of Service policies. © LISA *** right reserved.

关键词： Quality of service

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Super-resolution SAR imaging via nonlinear regressive model parameter estimation method

Super-resolution SAR imaging via nonlinear regressive model ...

引用

2nd conference on Computer Graphics, Imaging, and Vision: New Trends 2005

作者： Wang, Xiong-Liang Wang, Zheng-Ming Department of Mathematics Institute of Science National University of Defense Technology Changsha 410073 China

ISBN: (纸本)0769523927

A novel SAR super-resolution imaging method is described Firstly, SAR image peak extraction is carried out in the image domain and the coarse feature parameter estimation is obtained. Secondly, Parameter estimation of nonlinear regressive model is carried out in the phase history domain and the fine feature parameter estimation is obtained. Finally, from the estimated parameter and based on the point-scattering model, the simulated phase history data of large dimensions is generated. By FFT imaging, higher resolution image is obtained. Experimental examples have shown that this method offer significant advantages over the FFT methods to better resolve the dominant target scatterers. © 2005 IEEE.

关键词： Image analysis

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Pattern visualization for machine translation output 05

Pattern visualization for machine translation output

引用

Human Language Technology conference and conference on Empirical Methods in Natural Language Processing, HLT/EMNLP 2005, Co-located with the 2005 Document Understanding conference, DUC and the 9th International Workshop on Parsing Technologies, IWPT

作者： Lopez, Adam Resnik, Philip Institute for Advanced Computer Studies Department of Computer Science University of Maryland College Park MD 20742 United States Institute for Advanced Computer Studies Department of Linguistics University of Maryland College Park MD 20742 United States

We describe a method for identifying systematic patterns in translation data using part-ofspeech tag sequences. We incorporate this analysis into a diagnostic tool intended for developers of machine translation systems, and demonstrate how our application can be used by developers to explore patterns in machine translation output. © 2005 Association for Computational Linguistics.

关键词： Machine translation

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VisAR : A new technique for visualizing mined association rules

VisAR : A new technique for visualizing mined association ru...

引用

1st International conference on Advanced data Mining and Applications

作者： Techapichetvanich, K Datta, A Univ Western Australia Sch Comp Sci & Software Engn Perth WA 6009 Australia

ISBN: (纸本)354027894X

Many business organizations generate a huge amount of transaction data. Association rule mining is a powerful analysis tool to extract the useful meanings and associations from large databases and many automated systems have been developed for mining association rules. However, most of these systems usually mine many association rules from large databases and it is not easy for a user to extract meaningful rules. visualization has become an important tool in the data mining process for extracting meaningful knowledge and information from large data sets. Though there are several techniques for visualizing mined association rules, most of these techniques visualize the entire set of discovered association rules on a single screen. Such a dense display can overwhelm analysts and reduce their capability of interpretation. In this paper we present a novel technique called VisAR for visualizing mined association rules. VisAR consists of four major stages for visualizing mined association rules. These stages include managing association rules, filtering association rules of interest, visualizing selected association rules, and interacting with the visualization process. Our technique allows an analyst to view only a particular subset of association rules which contain selected items of interest. VisAR is able to display not only many-to-one but also many-to-many association rules. Moreover, our technique can overcome problems of screen clutter and occlusion.

关键词： visualization visual exploration association rules market basket

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