46,496 research outputs found

    Adjustable mount for a trihedral mirror Patent

    Get PDF
    Adjustable rigid mount for trihedral mirror formed of alloy with small coefficient of thermal expansion supporting screws and spring-biased plate

    Complementary MOS four-phase logic circuits

    Get PDF
    Technique can provide four-phase clock signal from single-phase clock and requires only one power supply voltage. This arrangement saves considerable power compared to circuits having load resistor between power supply and ground

    Directed flow, a signal for the phase transition in Relativistic Nuclear Collisions?

    Full text link
    The sign change of the slope of the directed flow of baryons has been predicted as a signal for a first order phase transition within fluid dynamical calculations. Recently, the directed flow of identified particles has been measured by the STAR collaboration in the beam energy scan (BES) program. In this article, we examine the collision energy dependence of directed flow v1v_1 in fluid dynamical model descriptions of heavy ion collisions for sNN=320\sqrt{s_{NN}}=3-20 GeV. The first step is to reproduce the existing predictions within pure fluid dynamical calculations. As a second step we investigate the influence of the order of the phase transition on the anisotropic flow within a state-of-the-art hybrid approach that describes other global observables reasonably well. We find that, in the hybrid approach, there seems to be no sensitivity of the directed flow on the equation of state and in particular on the existence of a first order phase transition. In addition, we explore more subtle sensitivities like e.g. the Cooper-Frye transition criterion and discuss how momentum conservation and the definition of the event plane affects the results. At this point, none of our calculations matches qualitatively the behavior of the STAR data, the values of the slopes are always larger than in the data.Comment: 7 pages, 7 figure

    ELECTRICITY CONSUMPTION IN RURAL VS. URBAN AREAS

    Get PDF
    Average Winter electricity consumption for rural residents in Utah is significantly greater than for those living in urban areas. Based on data from a 1980 survey of Utah residents, this rural-urban consumption differential was investigated using multiple regression analysis. It was determined that the stock of electricity-using devices, climate, and demographic characteristics were the most important determinants of variations in household electricity consumption. The hypothesis that rural residents use electricity-consuming devices more intensively than their urban counterparts was rejected.Resource /Energy Economics and Policy,

    Coherent-Classical Estimation for Linear Quantum Systems

    Full text link
    We study a coherent-classical estimation scheme for a class of linear quantum systems, where the estimator is a mixed quantum-classical system that may or may not involve coherent feedback. We show that when the quantum plant or the quantum part of the estimator (coherent controller) is an annihilation operator only system, coherent-classical estimation without coherent feedback can provide no improvement over purely-classical estimation. Otherwise, coherent-classical estimation without feedback can be better than classical-only estimation for certain homodyne detector angles, although the former is inferior to the latter for the best choice of homodyne detector angle. Moreover, we show that coherent-classical estimation with coherent feedback is no better than classical-only estimation, when both the plant and the coherent controller are annihilation operator only systems. Otherwise, coherent-classical estimation with coherent feedback can be superior to purely-classical estimation, and in this case, the former is better than the latter for the optimal choice of homodyne detector angle.Comment: Minor corrections; 10 pages, 13 figures, journal version. arXiv admin note: substantial text overlap with arXiv:1403.534
    corecore