Log periodic dipole arrays /

"Contract No. AF33(616)-6079 Project No. 9-(13-6278) Task 40572. Sponsored by: Wright Air Development Center"

Evaluation of the computation of wave direction with three-gage arrays /

Issued July 1977.

Empirical analysis of critical bare arrays of cylinders containing enriched UO₂(NO₃)₂ /

Includes bibliographic references (page 13).

Pagine sparse, raccolte da G. Castellano.

Mode of access: Internet.

I. Arrays of sex pheromone traps and the important variables affecting catches of gypsy moth, Lymantria dispar (Linneaus [sic]) Lepidoptera: Lymantriidae /

"May 1980."

Istoria delle cose auuenute in Toscana dall'anno 1300, al 1348. Et dell'origine della Parte Bianca [et] Nera, che di Pistoia si sparse per tutta Toscana [et] Lombardia ... / scritta per autore che ne' medesimi tempi visse ...

Edit16,

Notizie della santa casa della gran Madre di Dio Maria Vergine adorata in Loreto : già sparse in fogli sciolti /

Mode of access: Internet.

Pagine sparse,

Mode of access: Internet.

Lettere inedite e sparse di Costanza Monti Perticari,

Mode of access: Internet.

Inscrizioni sparse per Castiglione delle Stiverie raccolte sul fine dell'anno MDCCLIX : cosái come stanno incise.

Acquisition made accessible thanks to a 2015-2017 grant from the Council on Libraries and Information Resources.

Design and performance of large solar thermal collector arrays : proceedings of the International Energy Agency Workshop on the Design and Performance of Large Solar Thermal Collector Arrays, San Diego, California, 10-14 June 1984 /

Mode of access: Internet.

Comparison of three commercial sparse-matrix crystallization screens

Sparse-matrix sampling using commercially available crystallization screen kits has become the most popular way of determining the preliminary crystallization conditions for macromolecules. In this study, the efficiency of three commercial screening kits, Crystal Screen and Crystal Screen 2 (Hampton Research), Wizard Screens I and II (Emerald BioStructures) and Personal Structure Screens 1 and 2 (Molecular Dimensions), has been compared using a set of 19 diverse proteins. 18 proteins yielded crystals using at least one crystallization screen. Surprisingly, Crystal Screens and Personal Structure Screens showed dramatically different results, although most of the crystallization formulations are identical as listed by the manufacturers. Higher molecular weight polyethylene glycols and mixed precipitants were found to be the most effective precipitants in this study.

Nonlinear dynamics of a satellite with deployable solar panel arrays

The multibody dynamics of a satellite in circular orbit, modeled as a central body with two hinge-connected deployable solar panel arrays, is investigated. Typically, the solar panel arrays are deployed in orbit using preloaded torsional springs at the hinges in a near symmetrical accordion manner, to minimize the shock loads at the hinges. There are five degrees of freedom of the interconnected rigid bodies, composed of coupled attitude motions (pitch, yaw and roll) of the central body plus relative rotations of the solar panel arrays. The dynamical equations of motion of the satellite system are derived using Kane's equations. These are then used to investigate the dynamic behavior of the system during solar panel deployment via the 7-8th-order Runge-Kutta integration algorithms and results are compared with approximate analytical solutions. Chaotic attitude motions of the completely deployed satellite in circular orbit under the influence of the gravity-gradient torques are subsequently investigated analytically using Melnikov's method and confirmed via numerical integration. The Hamiltonian equations in terms of Deprit's variables are used to facilitate the analysis. (C) 2003 Published by Elsevier Ltd.

Effect of mutual coupling on the interference rejection capabilities of linear and circular arrays in CDMA systems

This paper is concerned with assessing the interference rejection capabilities of linear and circular array of dipoles that can be part of a base station of a code-division multiple-access cellular communication system. The performance criteria for signal-to-interference ratio (SIR) improvement employed in this paper is the spatial interference suppression coefficient. We first derive an expression for this figure of merit and then analyze and compare the SIR performance of the two types of arrays. For a linear array, we quantitatively assess the degradation in SIR performance, as we move from array broadside to array end-fire direction. In addition, the effect of mutual coupling is taken into account.

Quantum-error correction on linear-nearest-neighbor qubit arrays

A quantum circuit implementing 5-qubit quantum-error correction on a linear-nearest-neighbor architecture is described. The canonical decomposition is used to construct fast and simple gates that incorporate the necessary swap operations allowing the circuit to achieve the same depth as the current least depth circuit. Simulations of the circuit's performance when subjected to discrete and continuous errors are presented. The relationship between the error rate of a physical qubit and that of a logical qubit is investigated with emphasis on determining the concatenated error correction threshold.