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检索条件"任意字段=10th Conference on Theory and Practice of Computer Graphics 2012, TPCG 2012"

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Choice of internet governance structure: A cross-country study of national level factors 17

Choice of internet governance structure: A cross-country stu...

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10th International conference on theory and practice of Electronic Governance, ICEGOV 2017

作者： Pandey, Neena De, Rahul Indian Institute of Management - Bangalore Bannerghatta Road Bengaluru India

ISBN: (纸本)9781450348256

Internet's ever increasing positive and negative consequences (both intended and unintended) are leading to increased demand towards its improved design and better governance mechanisms. However, countries across the world are divided over the choice of Internet governance structure, i.e. multi-stakeholder versus multilateral form. this paper explores the role of institutional quality of countries on this choice. We base our empirical analysis on the WCIT-2012 data (of 144 countries) using the theory of legitimacy of governance forms. the analysis supports our hypothesized relationship. Further, a qualitative study of the ICT policies of 25 countries reveals the role of Internet affordances in this relationship. It also reveals how major national and international events can change the perceived affordances of Internet for countries which may have an effect on their preference for a particular governance structure. © 2017 ACM.

关键词： computer programming

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Improved automatic recognition of engineered nanoparticles in scanning electron microscopy images 10

Improved automatic recognition of engineered nanoparticles i...

引用

10th International conference on computer Vision theory and Applications, VISAPP 2015

作者： Kockentiedt, Stephen Toennies, Klaus Gierke, Erhardt Dziurowitz, Nico thim, Carmen Plitzko, Sabine Department of Simulation and Graphics Otto von Guericke University Magdeburg Magdeburg Germany Federal Institute for Occupational Safety and Health Berlin Germany

ISBN: (纸本)9789897580901

the amount of engineered nanoparticles produced each year has grown for some time and will grow in the coming years. However, if such particles are inhaled, they can be toxic. therefore, to ensure the safety of workers, the nanoparticle concentrations at workplaces have to be measured. this is usually done by gathering the particles in the ambient air and then taking images using scanning electron microscopy. the particles in the images are then manually identified and counted. However, this task takes much time. therefore, we have developed a system to automatically find and classify particles in these images (Kockentiedt et al., 2012). In this paper, we present an improved version of the system with two new classification feature types. the first are Haralick features. the second is a newly developed feature which estimates the counts of electrons detected by the scanning electron microscopy for each particle. In addition, we have added an algorithm to automatically choose the classifier type and parameters. this way, no expert is needed when the user wants to train the system to recognize a previously unknown particle type. the improved system yields much better results for two types of engineered particles and shows comparable results for a third type.

关键词： Nanoparticles

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On the fractal behaviour of AA patterns

On the fractal behaviour of AA patterns

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10th conference on theory and practice of computer graphics 2012, tpcg 2012

作者： Ahmed, Abdalla G.M.

ISBN: (纸本)9783905673937

"AA Patterns" is a recently discovered kind of algorithmic art in the form of pixel patterns;where each pixel in a 2D bitmap is set or unset according to a simple test applied to its coordinates pair. In spite of their iterationfree algorithm, AA Patterns exhibit signs which suggest some relation to fractals. this paper investigates this relationship, and reveals a new fractal which comes from an iteration-free process. © the Eurographics Association 2012.

关键词： computer graphics

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Path tracing on massively parallel neuromorphic hardware

Path tracing on massively parallel neuromorphic hardware

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10th conference on theory and practice of computer graphics 2012, tpcg 2012

作者： Richmond, P. Allerton, D.J. Department of Automatic Control Systems Engineering University of Sheffield United Kingdom

ISBN: (纸本)9783905673937

Ray tracing on parallel hardware has recently benefit from significant advances in the graphics hardware and associated software tools. Despite this, the SIMD nature of graphics card architectures is only able to perform well on groups of coherent rays which exhibit little in the way of divergence. this paper presents SpiNNaker, a massively parallel system based on low power ARM cores, as an architecture suitable for ray tracing applications. the asynchronous design allows us to demonstrate a linear performance increase with respect to the number of cores. the performance perWatt ratio achieved within the fixed point path tracing example presented is far greater than that of a multi-core CPU and similar to that of a GPU under optimal conditions. © the Eurographics Association 2012.

关键词： computer graphics

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ViewFusion: Correlating structure and activity views for execution traces

ViewFusion: Correlating structure and activity views for exe...

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10th conference on theory and practice of computer graphics 2012, tpcg 2012

作者： Trümper, Jonas Telea, Alexandru Döllner, Jürgen Hasso-Plattner-Institute Potsdam Germany University of Groningen Netherlands

ISBN: (纸本)9783905673937

Visualization of data on structure and related temporal activity supports the analysis of correlations between the two types of data. this is typically done by linked views. this has shortcomings with respect to efficient space usage and makes mapping the effect of user input into one view into the other view difficult. We propose here a novel, space-efficient technique that 'fuses' the two information spaces - structure and activity - in one view. We base our technique on the idea that user interaction should be simple, yet easy to understand and follow. We apply our technique, implemented in a prototype tool, for the understanding of software engineering datasets, namely static structure and execution traces of the Chromium web browser. © the Eurographics Association 2012.

关键词： computer graphics

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Hardware accelerated medical data visualisation on the Web

Hardware accelerated medical data visualisation on the Web

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10th conference on theory and practice of computer graphics 2012, tpcg 2012

作者： Wei, H. Clapworthy, G.J. Liu, E. Zhao, Y. McFarlane, N.M.B. Dept. of Computer Science and Technology University of Bedfordshire Luton United Kingdom

ISBN: (纸本)9783905673937

this paper proposes a way to develop high-quality real-time web-based medical 3D data visualisation. Isosurface extraction is used as an example to discuss how to use programmable graphics Processing Units (GPUs) and shaders to improve rendering performance on the web. the method is designed to reduce data transmission. When data is ready, the performance penalty can be considered negligible. A method to estimate memory usage to balance client memory limitation and rendering quality is also described. A way of using the frame rate to measure performance on the web is suggested, which could be used in future web visualisation. © the Eurographics Association 2012.

关键词： Data visualization

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Large scale pedestrian multi-simulation for a decision support tool

Large scale pedestrian multi-simulation for a decision suppo...

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10th conference on theory and practice of computer graphics 2012, tpcg 2012

作者： Karmakharm, T. Richmond, P. Department of Automatic Control and Systems Engineering University of Sheffield United Kingdom

ISBN: (纸本)9783905673937

Ability to simulate pedestrian behaviour on a large scale is essential in identifying potential dangers in public spaces during an evacuation. Multiple designs must be tested with varying parameters and run multiple times to achieve statistical significance due to the model's stochastic nature. In this short paper, we describe our prototype decision support tool that enables concurrent simulation on GPU-enabled computers by merging them to increase efficiency and dispatching simulation jobs across multiple machines on the network. Preliminary results with our GPU-optimised model have been shown to run at faster than real-time simulation speeds. © the Eurographics Association 2012.

关键词： computer simulation

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Physical and perceptual limitations of a projector-based high dynamic range display

Physical and perceptual limitations of a projector-based hig...

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10th conference on theory and practice of computer graphics 2012, tpcg 2012

作者： Wanat, Robert Petit, Josselin Mantiuk, Rafal School of Computer Science Bangor University United Kingdom

ISBN: (纸本)9783905673937

High dynamic range (HDR) displays capable of reproducing scenes of high luminance (exceeding 2,000 cd/m2) and contrast (more than 10,000:1) are a useful tool for research on visual performance, image quality or colour appearance. In this paper, we describe a projector-based HDR display, giving details on its hardware components and software for driving and calibrating the display. We report the colorimetric properties of the display: the colour reproduction accuracy, colour gamut and local contrast dependent on the size of displayed checkerboard pattern. To verify whether our display can produce local contrast inducing the colour that appears perfectly black to the observer, we conducted an experiment with human observers. Our results indicate that for the test pattern, the effective local contrast of our display (2500:1) is sufficient to produce perfectly black colour, which requires a contrast between 1300:1 and 2400:1. © the Eurographics Association 2012.

关键词： Colorimetry

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theory and practice of computer graphics 2012, tpcg 2012 - Eurographics UK Chapter Proceedings

Theory and Practice of Computer Graphics 2012, TPCG 2012 - E...

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10th conference on theory and practice of computer graphics 2012, tpcg 2012

ISBN: (纸本)9783905673937

the proceedings contain 15 papers. the topics discussed include: backwards compatible JPEG stereoscopic high dynamic range imaging;physical and perceptual limitations of a projector-based high dynamic range display;light clustering for dynamic image based lighting;path tracing on massively parallel neuromorphic hardware;using Quest3D to develop VES: a tool for enhancing electrical safety and design in the built environment;simplified user interface for architectural reconstruction;large scale pedestrian multi-simulation for a decision support tool;ViewFusion: correlating structure and activity views for execution traces;advanced, automatic stream surface seeding and filtering;analyzing and visualizing multivariate volumetric scalar data and their uncertainties;hardware accelerated medical data visualization on the web;and visualizing a spherical geological discrete element model of fault evolution.

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Visualizing a spherical geological discrete element model of fault evolution

Visualizing a spherical geological discrete element model of...

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10th conference on theory and practice of computer graphics 2012, tpcg 2012

作者： Longshaw, S.M. Turner, M.J. Finch, E. School of Computer Science University of Manchester United Kingdom Research Computing University of Manchester United Kingdom Basin Studies and Petroleum Geoscience School of Earth Atmospheric and Environmental Sciences University of Manchester United Kingdom

ISBN: (纸本)9783905673937

Discrete Element Modelling (DEM) is a numerical technique that uses a system of interacting discrete bodies to simulate the movement of material being exposed to external forces. this technique is often used to simulate granular systems;however by adding further elements that inter-connect the bodies, it can be used to simulate the deformation of a large volume of material. this method has precedent for use in the Earth Sciences and recently, with the increase of available computing power, it has been put to good use simulating the evolution of extensional faults in large scale crustal experiments that involve over half a million individual spherical bodies. An interactive environment that provides high quality rendering is presented, showing that interactivity is key in allowing the intelligent application of visualization methods such as colour-mapping and visibility thresholds in order to extract fault information from a geological DEM. It is also shown that glyph representation alone is not sufficient to provide full insight into the complex three dimensional geometries of the faults found within the model. To overcome this, a novel use of the MetaBall method is described, which results in implicit surface representations of sphere sub-sets. the surfaces produced are shown to provide greater insight into the faults found within the data but also raise questions as to their meaning. © the Eurographics Association 2012.

关键词： Faulting

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