15,094 research outputs found

    The virtual guide: a direction giving embodied conversational agent

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    We present the Virtual Guide, an embodied conversational agent that can give directions in a 3D virtual environment. We discuss how dialogue management, language generation and the generation of appropriate gestures are carried out in our system

    Incremental tape recorder and data rate converter Patent

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    Development of data storage system for storing digital data in high density format on magnetic tap

    Macroscopic mechanical oscillators at the quantum limit using optomechanical cooling

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    We discuss how the optomechanical coupling provided by radiation pressure can be used to cool macroscopic collective degrees of freedom, as vibrational modes of movable mirrors. Cooling is achieved using a phase-sensitive feedback-loop which effectively overdamps the mirrors motion without increasing the thermal noise. Feedback results able to bring macroscopic objects down to the quantum limit. In particular, it is possible to achieve squeezing and entanglement.Comment: 15 pages, 8 figures, RevTe

    Macroscopic thermal entanglement due to radiation pressure

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    Can entanglement and the quantum behavior in physical systems survive at arbitrary high temperatures? In this Letter we show that this is the case for a electromagnetic field mode in an optical cavity with a movable mirror in a thermal state. We also identify two different dynamical regimes of generation of entanglement separated by a critical coupling strength.Comment: Accepted in Phys. Rev. Let

    Airplane take-off performance indicator Patent

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    Aircraft instrument for indicating malfunctions during takeof

    On the theory of cavities with point-like perturbations. Part II: Rectangular cavities

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    We consider an application of a general theory for cavities with point-like perturbations for a rectangular shape. Hereby we concentrate on experimental wave patterns obtained for nearly degenerate states. The nodal lines in these patterns may be broken, which is an effect coming only from the experimental determination of the patterns. These findings are explained within a framework of the developed theory.Comment: 14 pages, 3 figure

    Terminal guidance system

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    A terminal guidance system is described including a heading command subsystem and a glide-slope command subsystem which develop command signals for use in guiding an aircraft or other vehicle into a preselected heading and/or altitude at a terminal point. The heading command subsystem is responsive to certain input data and continuously develops command signals for use in directing the aircraft from a remote location to a terminal point so that upon arrival it has a preselected terminal heading. The glide-slope command subsystem is responsive to certain other input data and continuously develops command signals for use in controlling the rate of descent of the aircraft so that it will have a preselected altitude and glide-slope upon arrival at the terminal
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