7,643 research outputs found

    QCD Predictions for Charm and Bottom Production at RHIC

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    We make up-to-date QCD predictions for open charm and bottom production at RHIC in nucleon-nucleon collisions at \sqrt{S} = 200 GeV. We also calculate the electron spectrum resulting from heavy flavor decays to allow direct comparison to the data. A rigorous benchmark, including the theoretical uncertainties, is established against which nuclear collision data can be compared to obtain evidence for nuclear effects.Comment: 5 pages, 4 figure

    Initial radio-frequency gas heating experiments to simulate the thermal environment in a nuclear light bulb reactor

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    Initial radio frequency gas heating experiments to simulate thermal environment in nuclear light bulb reacto

    Experimental investigations to simulate the thermal environment, transparent walls, and propellant heating in a nuclear light bulb engine

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    Simulating thermal environment, transparent walls, and propellant heating in nuclear light bulb engin

    Carbonation cell materials compatibility

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    Material test and evaluation program for compatibility of materials with alkaline and acid electrolyte environments of carbonation cell syste

    Space Trajectory Error Analysis Program (STEAP) for halo orbit missions. Volume 2: Programmer's manual

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    The six month effort was responsible for the development, test, conversion, and documentation of computer software for the mission analysis of missions to halo orbits about libration points in the earth-sun system. The software consisting of two programs called NOMNAL and ERRAN is part of the Space Trajectories Error Analysis Programs. The program NOMNAL targets a transfer trajectory from earth on a given launch date to a specified halo orbit on a required arrival date. Either impulsive or finite thrust insertion maneuvers into halo orbit are permitted by the program. The transfer trajectory is consistent with a realistic launch profile input by the user. The second program ERRAN conducts error analyses of the targeted transfer trajectory. Measurements including range, doppler, star-planet angles, and apparent planet diameter are processed in a Kalman-Schmidt filter to determine the trajectory knowledge uncertainty

    Olievervuiling op zee

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    The effect of bedrest on various parameters of physiological function. part xii- the effect of bedrest on bone mass and calcium balance

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    Bed rest effect on various parameters of physiological functions - bone mass and calcium balanc

    In-situ monitoring for CVD processes

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    Aiming towards process control of industrial high yield/high volume CVD reactors, the potential of optical sensors as a monitoring tool has been explored. The sensors selected are based on both Fourier transform infrared spectroscopy (FTIR) and tunable diode laser spectroscopy (NIR-DLS). The former has the advantage of wide spectral capability, and well established databases. NIR-DLS spectroscopy has potentially high sensitivity, laser spatial resolution, and the benefits of comparatively easier integration capabilities-including optical fibre compatibility. The proposed technical approach for process control is characterised by a 'chemistry based' feedback system with in-situ optical data as input information. The selected optical sensors continuously analyze the gas phase near the surface of the growing layer. The spectroscopic data has been correlated with process performance and layer properties which, in turn establish data basis for process control. The new process control approach is currently being verified on different industrialised CVD coaters. One of the selected applications deals with the deposition of SnO2 layers on glass based on the oxidation of (CH3)2SnCl2, which is used in high volume production for low-E glazing
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