53,381 research outputs found
Microbial burden prediction model program
Model supplements biological surveys of spacecraft by simulating microbial burden accumulation process during periods when surveys are not taken. Important application of model is to predict microbial loading on spacecraft landing capsule immediately prior to terminal heat sterilization
Bipolar current driver for memory circuits
Circuit which logically determines the state of a flip-flop and amplifies the current from a clock pulse provides a bipolar driving current to a memory circuit, the polarity of which is determined by the state of a flip-flop. This principle may be applied to various memory driving circuits where power dissipation must be minimized
Flipflop interrogator and bi-polar current driver Patent
Interrogator and current driver circuit for combination with transistor flip-flop circui
Study of growth parameters for refractory carbide single crystals quarterly status report no. 4, dec. 1, 1964 - mar. 1, 1965
Growth of single crystals of tantalum carbide and hafnium carbide, and their solid solution
A study program on the development of mathematical model/s/ for microbial burden prediction. Volume 1 - Technical report Final report
Mathematical models and computer program for microbial burden prediction - phases 1, 2,
Quantum geometry from 2+1 AdS quantum gravity on the torus
Wilson observables for 2+1 quantum gravity with negative cosmological
constant, when the spatial manifold is a torus, exhibit several novel features:
signed area phases relate the observables assigned to homotopic loops, and
their commutators describe loop intersections, with properties that are not yet
fully understood. We describe progress in our study of this bracket, which can
be interpreted as a q-deformed Goldman bracket, and provide a geometrical
interpretation in terms of a quantum version of Pick's formula for the area of
a polygon with integer vertices.Comment: 19 pages, 11 figures, revised with more explanations, improved
figures and extra figures. To appear GER
Holographic model for heavy vector meson masses
The experimentally observed spectra of heavy vector meson radial excitations
show a dependence on two different energy parameters. One is associated with
the quark mass and the other with the binding energy levels of the quark
anti-quark pair. The first is present in the large mass of the first state
while the other corresponds to the small mass splittings between radial
excitations. In this article we show how to reproduce such a behavior with
reasonable precision using a holographic model. In the dual picture, the large
energy scale shows up from a bulk mass and the small scale comes from the
position of anti-de Sitter (AdS) space where field correlators are calculated.
The model determines the masses of four observed S-wave states of charmonium
and six S-wave states of bottomonium with , 6.1 % rms error. In consistency
with the physical picture, the large energy parameter is flavor dependent,
while the small parameter, associated with quark anti-quark interaction is the
same for charmonium and bottomonium states.Comment: In V5 we just added some clarifying explanations about the model. 5
tables, no figure. Version published in Europhysics Letter
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