1,051 research outputs found
Protection of serially connected solar cells against open circuits by the use of shunting diode Patent
Maintaining current flow through solar cells with open connection using shunting diod
Analysis of electric propulsion electrical power conditioning component technology. Volume 1 - Data bank Final report
Analysis of electric propulsion electric power conditioning component technology - data revie
Analysis of electric propulsion electrical power conditioning component technology, volume 2 Final report
Large solar arrays to provide power for electric propulsion engine for Mars mapper spacecraf
Morse matchings on polytopes
We show how to construct homology bases for certain CW complexes in terms of
discrete Morse theory and cellular homology. We apply this technique to study
certain subcomplexes of the half cube polytope studied in previous works. This
involves constructing explicit complete acyclic Morse matchings on the face
lattice of the half cube; this procedure may be of independent interest for
other highly symmetric polytopes
Letters of Credit—A Comparison of Article 5 of the Uniform Commercial Code and the Washington Practice [Part 2]
It is our hope that this discussion will serve a dual purpose: (1) provide a basis for evaluating the desirability of Article 5 and so aid in an over-all evaluation of the Uniform Commercial Code in this period of pre-enactment consideration of the Code\u27s merits, and (2) provide a point of departure for Washington bankers and lawyers who become concerned with letter of credit problems after enactment of the Code. The first of these objectives seems better served if we undertake with each section a critique of its operation in light of the existing practice. This we have done
Letters of Credit—A Comparison of Article 5 of the Uniform Commercial Code and the Washington Practice [Part 1]
It is our hope that this discussion will serve a dual purpose: (1) provide a basis for evaluating the desirability of Article 5 and so aid in an over-all evaluation of the Uniform Commercial Code in this period of pre-enactment consideration of the Code\u27s merits, and (2) provide a point of departure for Washington bankers and lawyers who become concerned with letter of credit problems after enactment of the Code. The first of these objectives seems better served if we undertake with each section a critique of its operation in light of the existing practice. This we have done
Universal velocity distributions in an experimental granular fluid
We present experimental results on the velocity statistics of a uniformly
heated granular fluid, in a quasi-2D configuration. We find the base state, as
measured by the single particle velocity distribution , to be universal
over a wide range of filling fractions and only weakly dependent on all other
system parameters. There is a consistent overpopulation in the distribution's
tails, which scale as . More
importantly, the high probability central region of , at low velocities,
deviates from a Maxwell-Boltzmann by a second order Sonine polynomial with a
single adjustable parameter, in agreement with recent theoretical analysis of
inelastic hard spheres driven by a stochastic thermostat. To our knowledge,
this is the first time that Sonine deviations have been measured in an
experimental system.Comment: 13 pages, 15 figures, with minor corrections, submitted to Phys. Rev.
Caging dynamics in a granular fluid
We report an experimental investigation of the caging motion in a uniformly
heated granular fluid, for a wide range of filling fractions, . At low
the classic diffusive behavior of a fluid is observed. However, as
is increased, temporary cages develop and particles become increasingly
trapped by their neighbors. We statistically analyze particle trajectories and
observe a number of robust features typically associated with dense molecular
liquids and colloids. Even though our monodisperse and quasi-2D system is known
to not exhibit a glass transition, we still observe many of the precursors
usually associated with glassy dynamics. We speculate that this is due to a
process of structural arrest provided, in our case, by the presence of
crystallization.Comment: 4 pages, 5 figures, submitted to Phys. Rev. Let
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