14,994 research outputs found

    An interferometer based phase control system

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    An interferometer based phase control system for focusing and pointing the solar power satellite (SPS) power beam is discussed. The system is ground based and closed loop. One receiving antenna is required on Earth. A conventional uplink data channel transmits an 8 bit phase error correction back to the SPS for sequential calibration of each power module. Beam pointing resolution is better than 140 meters at the rectenna

    A power satellite sonic simulator

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    A simulator is described which generates and transmits a beam of audible sound energy mathematically similar to the solar power satellite (SPS) power beam. The simulator provides a laboratory means for analysis of ground based closed loop SPS phase control and of ionospheric effects on the SPS microwave power beam

    A sonic satellite power system microwave power transmission simulation

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    A simulator is described which generates and transmits a beam of audible sound energy mathematically similar to the SPS power beam. The simulator provides a laboratory means for analysis of ground based closed loop SPS phase control and of ionospheric effects on the SPS microwave power beam

    Sonic simulation of the SPS power beam

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    A Satellite Power System Microwave Transmission Simulator is described. The simulator generates and transmits a beam audible sound energy which is mathematically similar to the microwave beam which would transmit energy to Earth from a Solar Power Satellite. This allows areas such as power beam formation to be studied in a laboratory environment

    Beat frequency interference pattern characteristics study

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    The frequency spectra and corresponding beat frequencies created by the relative motions between multiple Solar Power Satellites due to solar wind, lunar gravity, etc. were analyzed. The results were derived mathematically and verified through computer simulation. Frequency spectra plots were computer generated. Detailed computations were made for the seven following locations in the continental US: Houston, Tx.; Seattle, Wa.; Miami, Fl.; Chicago, Il.; New York, NY; Los Angeles, Ca.; and Barberton, Oh

    Coarse-grained strain dynamics and backwards/forwards dispersion

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    A Particle Tracking Velocimetry experiment has been performed in a turbulent flow at intermediate Reynolds number. We present experimentally obtained stretching rates for particle pairs in the inertial range. When compensated by a characteristic time scale for coarse-grained strain we observe constant stretching. This indicates that the process of material line stretching taking place in the viscous subrange has its counterpart in the inertial subrange. We investigate both forwards and backwards dispersion. We find a faster backwards stretching and relate it to the problem of relative dispersion and its time asymmetry.Comment: 13 pages, 7 figue

    A theoretical study of microwave beam absorption by a rectenna

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    The rectenna's microwave power beam absorption limit was theoretically confirmed by two mathematical models descriptive of the microwave absorption process; first one model was based on the current sheet equivalency of a large planar array above a reflector and the second model, which was based on the properties of a waveguide with special imaging characteristics, quantified the electromagnetic modes (field configurations) in the immediate vicinity of a Rectenna element spacing which permit total power beam absorption by preventing unwanted modes from propagating (scattering) were derived using these models. Several factors causing unwanted scattering are discussed

    Nonlinear Dynamics of a Bose-Einstein Condensate in a Magnetic Waveguide

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    We have studied the internal and external dynamics of a Bose-Einstein condensate in an anharmonic magnetic waveguide. An oscillating condensate experiences a strong coupling between the center of mass motion and the internal collective modes. Due to the anharmonicity of the magnetic potential, not only the center of mass motion shows harmonic frequency generation, but also the internal dynamics exhibit nonlinear frequency mixing. We describe the data with a theoretical model to high accuracy. For strong excitations we test the experimental data for indications of a chaotic behavior.Comment: 4 pages, 4 figure

    Qui Tam Actions for Citizen Enforcement of the Refuse Act of 1899 against Polluters

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    It may be possible for private citizens to enforce the Refuse Act of 1899 when prosecutors refuse to act. This is possible, proponents suggest, by applying the ancient theory of qui tam to criminal sanctions in the Refuse Act. So far, the scheme has met with no reported judicial approval. ...The court again recognized in 1943 that qui tam suits have been frequently permitted by legislative action . . . . A number of Federal statutes authorize qui tam action by the common informer.12 As late as 1970, the Hudson River Fisherman\u27s Association was granted $2,000, under the 1899 Rivers and Harbors Act, for exposing polluters of the Hudson River. The question is: Did Congress, by allowing the payment of one half of the fine in Section 411, give citizens the right to bring qui tam actions to enforce the Refuse Act
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