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Some 30% of disc galaxies have a pronounced central bar feature in the disc plane and many more have weaker features of a similar kind. Kinematic data indicate that the bar constitutes a major non-axisymmetric component of the mass distribution and that the bar pattern tumbles rapidly about the axis normal to the disc plane. The observed motions are(More)
Two-syllable words (burden; furrow; mantle; ration) each spoken in happy, angry, sad, and neutral tones of voice were dichotically paired. For each presented word-pair, subjects were asked to localise ("left"; "right") or reject the presence of one pre-specified word on one block of trials and one pre-specified emotional tone on a second trial block. Right(More)
Galactic synchrotron emission is a potentially confusing foreground, both in total power and in polarization, to the Cosmic Microwave Background Radiation. It also contains much physical information in its own right. This review examines the amplitude, angular power spectrum and frequency spectrum of the synchrotron emission as derived from the presently(More)
The paper presents the first results obtained with the Jodrell Bank – IAC two-element 33 GHz interferometer. The instrument was designed to measure the level of the Cosmic Microwave Background (CMB) fluctuations at angular scales of 1 • − 2 •. The observations analyzed here were taken in a strip of the sky at Dec=+41 • with an element separation of 16.7 λ,(More)
Fully cured epoxy samples of Araldite DLS 772 / 4 4' DDS with an amine to epoxy ratio of 0.8M were dissolved in 4M nitric acid in a microwave reaction system at a temperature of 120 o C for a total of 75 minutes. The dissolved compound was collected and dried. High Performance Liquid Chromatography was used to analyze and separate the components in the(More)
Samples of an epoxy resin system, based on Araldite DLS 772 and 4 4' DDS (a hardener) with an amine / epoxy ratio of 0.8 were cured using conventional and microwave heating. The cured samples were cut into the required dimensions using ASTM standards, and then subjected to Density, Dynamic Mechanical Thermal Analysis and Flexural tests. It was observed that(More)
Attack of Portland cement by ambient sulfates presents a considerable risk to structures in some environments. In this study, x-ray microtomography, a high resolution variant of medical " CT " , noninvasively mapped the progression of damage in Portland cement resulting from exposure to an aqueous solution of Na 2 SO 4 (sodium ion concentration of 10,000(More)
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