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 $f(c)$, 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 $f\propto\exp(\mathrm{const.}\times c^{-3/2})$. More importantly, the high probability central region of $f(c)$, 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, $\phi$. At low $\phi$ the classic diffusive behavior of a fluid is observed. However, as $\phi$ 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