Researchers have studied brain injury in children by assessing linear and angular accelerations, without taking into account vibratory loads. A proposed approach employs a new mathematical head model that includes vib...
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Researchers have studied brain injury in children by assessing linear and angular accelerations, without taking into account vibratory loads. A proposed approach employs a new mathematical head model that includes vibration to analyze how shaken-baby syndrome affects babies. To account for vibrations, it applies the finite-element method to model the stresses, strains, and displacements in the neck vertebrae and brain. This research also modeled the effects of a single blow to the head. In both cases, researchers determined the extent of alterations by comparing brain tissue strength with predictions of increased tension. The vibration results predict alterations in the cervical vertebrae in some oscillation modes and are consistent with studies of cervical cord whiplash injuries. The single-blow results predict brain and spinal cord alterations and are consistent with scanner slices made by other researchers. [ABSTRACT FROM PUBLISHER]
Tree visualization is one of the best-studied areas of information visualization; researchers have developed more than 200 visualization and layout techniques for trees. The *** project aims to provide a hand-curated ...
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Tree visualization is one of the best-studied areas of information visualization; researchers have developed more than 200 visualization and layout techniques for trees. The *** project aims to provide a hand-curated bibliographical reference to this ever-growing wealth of techniques. It offers a visual overview that users can filter to a desired subset along the design criteria of dimensionality, edge representation, and node alignment. Details, including links to the original publications, can be brought up on demand. *** has become a community effort, with researchers sending in preprints of their tree visualization techniques to be published or pointing out additional information. [ABSTRACT FROM PUBLISHER]
Supercomputing centers are unique resources that aim to enable scientific knowledge discovery by employing large computational resources-the 'Big Iron.' Design, acquisition, installation, and management of the...
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Supercomputing centers are unique resources that aim to enable scientific knowledge discovery by employing large computational resources-the 'Big Iron.' Design, acquisition, installation, and management of the Big Iron are carefully planned and monitored. Because these Big Iron systems produce a tsunami of data, it's natural to colocate the visualization and analysis infrastructure. This infrastructure consists of hardware (Little Iron) and staff (Skinny Guys). Our collective experience suggests that design, acquisition, installation, and management of the Little Iron and Skinny Guys doesn't receive the same level of treatment as that of the Big Iron. This article explores the following questions about the Little Iron: How should we size the Little Iron to adequately support visualization and analysis of data coming off the Big Iron? What sort of capabilities must it have? Related questions concern the size of visualization support staff: How big should a visualization program be-that is, how many Skinny Guys should it have? What should the staff do? How much of the visualization should be provided as a support service, and how much should applications scientists be expected to do on their own?
We developed an autostereoscopic display for distant viewing of 3D computer graphics (CG) images without using special viewing glasses or tracking devices. The images are created by employing referential viewing area-...
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We developed an autostereoscopic display for distant viewing of 3D computer graphics (CG) images without using special viewing glasses or tracking devices. The images are created by employing referential viewing area-based CG image generation and pixel distribution algorithm for integral photography (IP) and integral videography (IV) imaging. CG image rendering is used to generate IP/IV elemental images. The images can be viewed from each viewpoint within a referential viewing area and the elemental images are reconstructed from rendered CG images by pixel redistribution and compensation method. The elemental images are projected onto a screen that is placed at the same referential viewing distance from the lens array as in the image rendering. Photographic film is used to record the elemental images through each lens. The method enables 3D images with a long visualization depth to be viewed from relatively long distances without any apparent influence from deviated or distorted lenses in the array. We succeeded in creating an actual autostereoscopic images with an image depth of several meters in front of and behind the display that appear to have 3D even when viewed from a distance.
This special section of computer & graphics provided an excellent opportunity to increase the visibility of work being done in Brazil by the Brazilian Virtual Reality researchers, acknowledging the best papers of ...
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This special section of computer & graphics provided an excellent opportunity to increase the visibility of work being done in Brazil by the Brazilian Virtual Reality researchers, acknowledging the best papers of the Ⅻ Symposium on Virtual and Augmented Reality (SVR2010) held in Natal/Brazil in May 2010. SVR is the major event on Virtual and Augmented Reality in Brazil and Latin America, a venue which has been taken place over the past ten years, a sure sign of a well-established and successful community. We are very honored with the invitation by Prof. Joaquim Jorge to be Guest Editors of this special section. We would also like to thank the Brazilian computer Society (SBC) and its team that has supported the SVR conference for many years.
Abstract This paper describes interactive applications used to illustrate an advanced course on multivariable contrssol. The direct manipulation of features in graphics, such as eigenvectors in the phase plane or obse...
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Abstract This paper describes interactive applications used to illustrate an advanced course on multivariable contrssol. The direct manipulation of features in graphics, such as eigenvectors in the phase plane or observer eigenvalues in the complex plane, gives the student the means to explore not only the effect of parameters in the ranges usually considered as realistic, but also to observe the consequences of more extreme choices and get a better understanding of the design methods. The applications are implemented in Sysquake to provide a simple user interface, consistent across a wide range of examples from classical to advanced control.
In this paper, a tele-operation construction robot (TOCR) control system with virtual reality is discussed. The system consists of TOCR driven by hydraulic servo system, two joysticks for controlling the TOCR, and 2-d...
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In this paper, a tele-operation construction robot (TOCR) control system with virtual reality is discussed. The system consists of TOCR driven by hydraulic servo system, two joysticks for controlling the TOCR, and 2-dimensional working environment created by virtual reality technology. And the operator performs the remote operation of the construction robot by manipulating the graphic robot directly in virtual environment using the joysticks. The position and shape of the task objects in virtual world are updated in real-time on basis of image information obtained by a trinocular stereo vision camera fixed in the remote site. To improve the efficiency as well as security of tele-operation, and overcome the shortcomings of conventional visual display, the methods of auto point of view (APV) and semi-transparent object (STO) are introduced in this paper. Finally, the experiments confirmed that one-screen visual display combining APV and STO is superior in operability, safety, and reduction of stress than the conventional visual display.
This paper introduces a methodology for constructing pen and ink style landscape illustrations using B-spline surface models. Following a brief discussion of manual methods and recent developments in automated non-pho...
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This paper introduces a methodology for constructing pen and ink style landscape illustrations using B-spline surface models. Following a brief discussion of manual methods and recent developments in automated non-photorealistic rendering (NPR) techniques, the paper discusses polynomial models for surface rendering and their implementation in the OpenGL graphics interface. It then discusses the generation of silhouettes and form lines for topographic surfaces from a set of triangulated vertices obtained from polygonal tessellations. An implementation of the methodology outlined in the paper is described and tested. The results are analyzed and suggestions for further research are presented.
In this paper, the authors will explore issues in the development of hybrid and online courses for the computer graphics technology field. Course design issues will be explored, as well as course management issues. Th...
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In this paper we set out a future scenario of mobile presence. We will define our understanding of the term mobile presence. We will derive the requirements imposed by mobile presence with respect to computer graphics...
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