2,999 research outputs found

    Vibrating-membrane electrometer has high conversion gain

    Get PDF
    Vibrating-membrane transducer in a circuit can measure current below 10 to-the-minus 17 ampere. This electrometer has a high conversion gain and a minimum internal power consumption

    Optimal training sequences for channel estimation in cyclic-prefix-based single-carrier systems with transmit diversity

    Get PDF

    Channel and noise variance estimation and tracking algorithms for unique-word based single-carrier systems

    Get PDF

    Performance of the EP-MBCJR algorithm in time dispersive MIMO office environments

    Get PDF

    A comparison of MIMO-OFDM and MIMO-SCFDE in WLAN environments

    Get PDF

    Natural Color Preservation

    Get PDF
    Specimens are preserved, primarily, in order to demonstrate or study at some future time, their appearance, shape, and structure as found in the living state. Heretofore, no one method of procedure or preservative has completely fulfilled all of these requirements. The development of such an ideal preservative has been unsuccessfully sought since the time of the ancient Egyptians, when the now lost art of embalming mummies was in vogue. The writer recalls reading some of the scientific articles dealing with natural colors in tissues, at about the same time an article appeared in one of the leading popular journals. This article described how the Russians had so ably preserved the body of Nicolai Lenin. It was stated that only one or two Russian scientists were allowed to know the method used. After 24 years of preservation, Lenin\u27s body is still seen in its original lifelike appearance by the hundreds of Russians who daily file by his mortal remains

    Off-Mass-Shell π\piN Scattering and ppppπ0pp \to pp \pi^0

    Full text link
    We adapt the off-shell π\piN amplitude of the Tucson-Melbourne three-body force to the half-off-shell amplitude of the pion rescattering contribution to ppppπ0pp \to pp \pi^0 near threshold. This {\em pion} rescattering contribution, together with the impulse term, provides a good description of the data when the half-off-shell amplitude is linked to the phenomenological invariant amplitudes obtained from meson factory π\piN scattering data.Comment: 3 pages, contributed to STORRI99, Bloomington, Indiana, September 199

    Momentum and Coordinate Space Three-nucleon Potentials

    Full text link
    In this paper we give explicit formulae in momentum and coordinate space for the three-nucleon potentials due to ρ\rho and π\pi meson exchange, derived from off-mass-shell meson-nucleon scattering amplitudes which are constrained by the symmetries of QCD and by the experimental data. Those potentials have already been applied to nuclear matter calculations. Here we display additional terms which appear to be the most important for nuclear structure. The potentials are decomposed in a way that separates the contributions of different physical mechanisms involved in the meson-nucleon amplitudes. The same type of decomposition is presented for the ππ\pi - \pi TM force: the Δ\Delta, the chiral symmetry breaking and the nucleon pair terms are isolated.Comment: LATEX, 33 pages, 3 figures (available as postscript files upon request
    corecore