13,177 research outputs found

    Experimental investigation of reactor-loop transients during startup of a simulated SNAP-8 system

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    Primary loop transients during startup of Rankine cycle space power system in SNAP 8 simulato

    Consequences of the Factorization Hypothesis in pbar p, pp, gamma p and gamma gamma Collisions

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    Using an eikonal analysis, we examine the validity of the factorization theorem for nucleon-nucleon, gamma p and gamma gamma collisions. As an example, using the additive quark model and meson vector dominance, we directly show that for all energies and values of the eikonal, that the factorization theorem sigma_{nn}/sigma_{gamma p} = sigma_{gamma p}/sigma_{gamma gamma} holds. We can also compute the survival probability of large rapidity gaps in high energy pbar p and pp collisions. We show that the survival probabilities are identical (at the same energy) for gamma p and gamma gamma collisions, as well as for nucleon-nucleon collisions. We further show that neither the factorization theorem nor the reaction-independence of the survival probabilities depends on the assumption of an additive quark model, but, more generally, depends on the opacity of the eikonal being independent of whether the reaction is n-n, gamma p or gamma gamma.Comment: 8 pages, Revtex, no figures. Expanded discussion, minor correction

    Advanced Langmuir Probe (LP)

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    The dynamic response of the MK-2 version of the Langmuir probe amplifier was studied. The settling time of the step response is increased by: (1) stray node-to-ground capacitance at series connections between high value feedback resistors; and (2) input capacitance due to the input cable, FET switches, and input source follower. The stray node-to-ground capacitances can be reduced to tolerable levels by elevating the string of feedback resistors above the printing board. A new feedback network was considered, with promising results. The design uses resistances having much lower nominal values, thereby minimizing the effect of stray capacitances. Faster settling times can be achieved by using an operational amplifier having a higher gain-bandwidth product

    The High Energy Behavior of the Forward Scattering Parameters---An Amplitude Analysis Update

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    Utilizing the most recent experimental data, we reanalyze high energy \pbar p and pp data, using the asymptotic amplitude analysis, under the assumption that we have reached `asymptopia'. This analysis gives strong evidence for a log(s/s0)\log \,(s/s_0) dependence at {\em current} energies and {\em not} log2(s/s0)\log^2 (s/s_0), and also demonstrates that odderons are {\em not} necessary to explain the experimental data.Comment: 7 pages in LaTeX, 4 figures and 5 files, uuencoded in file "sigall.uu

    Rethinking the Oedipus Complex

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    SON AND FATHER: BEFORE AND BEYOND THE OEDIPUS COMPLEX Peter Bios, Ph.D. Free Press, New York, 1985 $27.95 186 page

    Experimental pressure drop investigation of wetting and nonwetting mercury condensing in uniformly tapered tubes

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    Pressure drop of wetting and nonwetting mercury condensing in tapered tubes - turbogenerator system

    Biodiversity in drinking water distribution systems:a brief review

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    In drinking water distribution systems, three groups of living organisms are usually found in the biofilm and circulating water: heterotrophic bacteria, free-living protozoa, and macro-invertebrates. Indirect evidence suggests that protozoa grazing in distribution systems can partially eliminate biomass production and accidental microbiological pollution. This paper examines the biodiversit in drinking water distribution systems
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