81,270 research outputs found

    A tentative explanation of cosmological red shift

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    The authors suggest a possible alternative explanation of cosmological red shift. They consider that there exists a background field in the universe, and that light (the photon) has an extremely weak interaction with this background, and as result, experiences an energy loss. By analogy with damped oscillations, the authors introduce a dumping term with the first derivative with respect to time in the wave equation. The solution yields a linearly reduced frequency of the light with travel distance. The purpose of this exercise is to demonstrate how a simple alternative interpretation of the Hubble relation can be generated

    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

    Experimental evaluation of atmospheric effects on radiometric measurements using the EREP of Skylab

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    The author has identified the following significant results. Test sites were located near the Great Salt Lake and the Salton Sea. Calculations were performed for a set of atmospheric models corresponding to the test sites, in addition to standard models for summer and winter midlatitude atmospheres with respective integrated water vapor amount of 2.4 g/sq cm and 0.9 g/sq cm. Each atmosphere was found to contain an average amount of continental aerosol. Computations were valid for high solar elevation angles. Atmospheric attenuation quantities were computed in addition to simulated EREP S192 radiances

    On dispersion and characteristic motions of temperature rate dependent materials

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    Three dimensional theory of thermomechanical material developed using techniques of continuum mechanics and law of thermodynamic

    Shifting RbR_b with AFBbA^b_{FB}

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    Precision measurements at the ZZ resonance agree well with the standard model. However, there is still a hint of a discrepancy, not so much in RbR_b by itself (which has received a great deal of attention in the past several years) but in the forward-backward asymmetry AFBbA^b_{FB} together with RbR_b. The two are of course correlated. We explore the possibilty that these and other effects are due to the mixing of bLb_L and bRb_R with one or more heavy quarks.Comment: 11 pages, 1 Figure, LaTex fil

    Spin correlations and velocity-scaling in color-octet NRQCD matrix elements

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    We compute spin-dependent decay matrix elements for S-wave charmonium and bottomonium in lattice nonrelativistic quantum chromodynamics (NRQCD). Particular emphasis is placed upon the color-octet matrix elements, since the corresponding production matrix elements are expected to appear in the dominant contributions to the production cross sections at large transverse momenta. We use three slightly different versions of the heavy-quark lattice Green's functions in order to minimize the contributions that scale as powers of the ultraviolet cutoff. The lattice matrix elements that we calculate obey the hierarchy that is suggested by the velocity-scaling rules of NRQCD.Comment: 25 pages, 2 figures, 2 tables, further discussion of effective lattice cutoffs and uncertainties, additional minor revisions, version to be published in Phys. Rev.

    Rank-ordered Multifractal Spectrum for Intermittent Fluctuations

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    We describe a new method that is both physically explicable and quantitatively accurate in describing the multifractal characteristics of intermittent events based on groupings of rank-ordered fluctuations. The generic nature of such rank-ordered spectrum leads it to a natural connection with the concept of one-parameter scaling for monofractals. We demonstrate this technique using results obtained from a 2D MHD simulation. The calculated spectrum suggests a crossover from the near Gaussian characteristics of small amplitude fluctuations to the extreme intermittent state of large rare events.Comment: 4 pages, 5 figure
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