15,094 research outputs found
The virtual guide: a direction giving embodied conversational agent
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
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
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
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
Aircraft instrument for indicating malfunctions during takeof
On the theory of cavities with point-like perturbations. Part II: Rectangular cavities
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
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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