9 research outputs found

    Efficient Resource Usage Techniques in Multiservice Networks

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    This paper is concerned with the saturation probability of aggregate traffic data arrival rate on a communication link. This performance metric, also referred to as tail distribution of aggregate traffic, is essential in traffic control and management algorithms of high speed networks including future QoS Internet. In this paper efficient closed-form upper bounds have been derived for the saturation probability when very few information is available on the aggregate traffic. The performance of these estimators is also performed via numerical examples

    Real-time Synthesis of Bleeding for Virtual

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    Abstract. Simulating bleeding in a virtual reality surgical simulator is an important task that still has not found a visually appealing solution. Bleeding in a simulator not only tests a surgeon to deal with critical issues, but also affects the environment by obscuring the view in which the surgeon has to operate. For any virtual reality surgical simulator, bleeding has to be treated, while at the same time the bleeding has to be responsive to any feedback that the surgeon may be conducing to the virtual reality environment. And all this has to be performed in real-time, i.e. at frame-rate. In this paper we present a methodology for solving this particular problem and show preliminary results of real-time visualization of bleeding in a dynamic virtual reality environment.

    Real-time Synthesis of Bleeding for Virtual

    No full text
    Abstract. Simulating bleeding in a virtual reality surgical simulator is an important task that still has not found a visually appealing solution. Bleeding in a simulator not only tests a surgeon to deal with critical issues, but also affects the environment by obscuring the view in which the surgeon has to operate. For any virtual reality surgical simulator, bleeding has to be treated, while at the same time the bleeding has to be responsive to any feedback that the surgeon may be conducing to the virtual reality environment. And all this has to be performed in real-time, i.e. at frame-rate. In this paper we present a methodology for solving this particular problem and show preliminary results of real-time visualization of bleeding in a dynamic virtual reality environment.

    Real-time Synthesis of Bleeding for Virtual

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    Simulating bleeding in a virtual reality surgical simulator is an important task that still has not found a visually appealing solution

    Enhancing the visual realism of hysteroscopy simulation

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    Visualization is a very important part of a high fidelity surgical simulator. Due to modern computer graphics hardware, which offers more and more features and processing power, it is possible to extend the standard OpenGL rendering methods with advanced visualization techniques to achieve highly realistic rendering in real-time. For an easy and efficient use of these new capabilities, a stand-alone graphics engine has been implemented, which exploits these advanced rendering techniques and provides an interface in order to ensure the interoperability with a software framework for surgical simulators

    Real-time Synthesis of Bleeding for Virtual

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    In this paper we present a method for simulating bleeding in a virtual reality hysteroscopic simulator for surgical training. The simulated bleeding is required to be visually appealing while at the same time instantaneously responsive to any feedback that the surgeon may be conducing to the virtual environment. In order to meet these real-time requirements, we have based the simulation on graphical fluid solvers. These solvers primarily work best over a 2D domain. For correct visualization in the hysteroscopic simulator, it is, however, necessary to perform the simulation fully in 3D. Therefore in this paper we also present the design modifications for 3D graphical fluid solving and show how to use parallelization to maintain real-time behavior. We also discuss how the incorporation of massless particles into the simulation can improve the visual quality of the results by limiting numerical dissipation e#ects
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