18,286 research outputs found

    Kinetic Study of Electrically Activated Reacting Systems at Relatively Low Temperature Levels Progress Report, Sep. 1965 - Mar. 1966

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    Chemical process for study of thermodynamic and kinetic behavior of electrically activated reaction

    Fiber distributed feedback laser

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    Utilizing round optical fibers as communication channels in optical communication networks presents the problem of obtaining a high efficiency coupling between the optical fiber and the laser. A laser is made an integral part of the optical fiber channel by either diffusing active material into the optical fiber or surrounding the optical fiber with the active material. Oscillation within the active medium to produce lasing action is established by grating the optical fiber so that distributed feedback occurs

    Systolic VLSI for Kalman filters

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    A novel two-dimensional parallel computing method for real-time Kalman filtering is presented. The mathematical formulation of a Kalman filter algorithm is rearranged to be the type of Faddeev algorithm for generalizing signal processing. The data flow mapping from the Faddeev algorithm to a two-dimensional concurrent computing structure is developed. The architecture of the resulting processor cells is regular, simple, expandable, and therefore naturally suitable for VLSI chip implementation. The computing methodology and the two-dimensional systolic arrays are useful for Kalman filter applications as well as other matrix/vector based algebraic computations

    Laser action generated within a light pipe: A concept

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    Laser light could be generated within light pipe itself, thereby eliminating coupling losses. Theoretical calculations have shown feasibility of light-pipe laser propagating in circularly-polarized TE mode. It is predicted that fiber-optic distributed-feedback laser would have gain on order of 25 dB

    Density and flux distributions of neutral gases in the lunar atmosphere

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    Neon, argon, and helium density and flux distributions in lunar atmospher

    Search for uncharged faster than light particles

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    Searching for uncharged particles with spacelike four momentum traveling faster than ligh
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