39,807 research outputs found

    EPLURIBuS uNuM

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    Many words can be regarded as made up of a sequence of smaller ones. This article takes a look at some

    Analysis of trends in premature mortality by Labour voting in the 1997 general election

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    Mortality relates to voting patterns within areas: mortality is higher the greater the proportion of the electorate who vote Labour or abstain and the converse is the case with regard to the percentage of the electorate who vote Conservative. This reflects the socioeconomic characteristics of individuals who vote for these parties, with Labour being identified with the working class and the Conservatives with the middle class. In the 1997 election, Labour was returned to office after 18 years in opposition. The government has released targets for reducing health inequalities and made it clear that such a reduction is a principal policy aim. These targets may be difficult to meet for two reasons. Firstly, factors influencing inequalities in adult health act from an early age onwards and may not respond rapidly to social change3; secondly, there has as yet been no reduction in social inequality (as indexed by income inequality) under the Labour government.4 Here we use premature mortality as an indicator of which population groups have fared best under the present government

    Metric half-span model support system

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    A model support system used to support a model in a wind tunnel test section is described. The model comprises a metric, or measured, half-span supported by a nonmetric, or nonmeasured half-span which is connected to a sting support. Moments and forces acting on the metric half-span are measured without interference from the support system during a wind tunnel test

    Nuclear bars and blue nuclei within barred spiral galaxies

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    Multicolour near IR photometry for a sample of 32 large barred spiral galaxies is presented. By applying ellipse fitting techniques, we identify significant isophote twists with respect to the primary bar axis in the nuclear regions of ∼\sim70 \%\ of the sample. These twists are identified in galaxies as late as SBbc and are clearly distinguishable from spiral arm morphology. At most seven of the galaxies with isophote twists are inferred to possess secondary (nuclear) bars, the axis ratios of which appear to correlate with morphological type. The remainder may result from triaxial bulges, or from oblate bulges misaligned with the primary bar. The near IR colour distributions in these data show evidence for (red) circumnuclear star forming rings in 4 galaxies. The majority of the sample (19) also possess striking blue nuclear regions, bluer than typical old stellar populations by ∼\sim0.3 mag. in (J--H) and ∼\sim0.23 mag. in (H--K). Such blue colours do not appear to correlate with the presence of nuclear rings or pseudo--rings, nor with the activity of the host galaxy (as determined from emission--line spectroscopic characteristics). Several mechanisms to explain this blue colour are considered.Comment: 24 pages plain LaTex( including table captions), 5 tables and 18 figures. Accepted for publication in MNRAS. Paper and tables available via anonymous ftp://143.167.4.101/pub/papers as sqiid-paper.tex and table1,2,3.tex, table4.ps, table5.ps. Figures available as postcript upon request to first Autho

    Kinetics of non-equilibrium quasiparticle tunneling in superconducting charge qubits

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    We directly observe low-temperature non-equilibrium quasiparticle tunneling in a pair of charge qubits based on the single Cooper-pair box. We measure even- and odd-state dwell time distributions as a function of temperature, and interpret these results using a kinetic theory. While the even-state lifetime is exponentially distributed, the odd-state distribution is more heavily weighted to short times, implying that odd-to-even tunnel events are not described by a homogenous Poisson process. The mean odd-state dwell time increases sharply at low temperature, which is consistent with quasiparticles tunneling out of the island before reaching thermal equilibrium.Comment: Replaced Figure 1 with color version, corrected more typos. Version submitted to PR

    Design of a "Digital Atlas Vme Electronics" (DAVE) Module

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    ATLAS-SCT has developed a new ATLAS trigger card, 'Digital Atlas Vme Electronics' ("DAVE"). The unit is designed to provide a versatile array of interface and logic resources, including a large FPGA. It interfaces to both VME bus and USB hosts. DAVE aims to provide exact ATLAS CTP (ATLAS Central Trigger Processor) functionality, with random trigger, simple and complex deadtime, ECR (Event Counter Reset), BCR (Bunch Counter Reset) etc. being generated to give exactly the same conditions in standalone running as experienced in combined runs. DAVE provides additional hardware and a large amount of free firmware resource to allow users to add or change functionality. The combination of the large number of individually programmable inputs and outputs in various formats, with very large external RAM and other components all connected to the FPGA, also makes DAVE a powerful and versatile FPGA utility cardComment: 8 pages, 4 figures, TWEPP-2011; E-mail: [email protected]

    Absolute linear instability in laminar and turbulent gas/liquid two-layer channel flow

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    We study two-phase stratified flow where the bottom layer is a thin laminar liquid and the upper layer is a fully-developed gas flow. The gas flow can be laminar or turbulent. To determine the boundary between convective and absolute instability, we use Orr--Sommerfeld stability theory, and a combination of linear modal analysis and ray analysis. For turbulent gas flow, and for the density ratio r=1000, we find large regions of parameter space that produce absolute instability. These parameter regimes involve viscosity ratios of direct relevance to oil/gas flows. If, instead, the gas layer is laminar, absolute instability persists for the density ratio r=1000, although the convective/absolute stability boundary occurs at a viscosity ratio that is an order of magnitude smaller than in the turbulent case. Two further unstable temporal modes exist in both the laminar and the turbulent cases, one of which can exclude absolute instability. We compare our results with an experimentally-determined flow-regime map, and discuss the potential application of the present method to non-linear analyses.Comment: 33 pages, 20 figure

    Electrochemical Characterization of Nonaqueous Systems for Secondary Battery Application Quarterly Report, May - Jul. 1968

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    Electrochemical characterization of nonaqueous systems for secondary battery applicatio

    Craft Design and Technology in Primary Schools

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    Craft, Design and Technology, with its problemsolving base is now well established in secondary schools and the recent DES statement on the organisation and content of the 5-16 curriculum has clearly set the Government's seal of approval on this aspect of the secondary curriculum. However, it is important to note that the document also places a strong emphasis on children making an early start in CDT type experiences by providing them right from the infant stage of the primary phase of education.The mere existence, let alone the far-reaching implications of such a statement may surprise both traditionally minded secondary CDT teachers - 'Young kids can't handle tools, let alone design "; and some primary teachers for whom 'science' and 'using tools and materials' have frightening connotations. Despite reactions of this kind, there are at least two crucial issues which must be faced when seriously considering this question

    Characteristics of an anechoic chamber for fan noise testing

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    Acoustical and mechanical design features of NASA Lewis Research Center's engine fan noise facility are described. Acoustic evaluation of the chamber, which is lined with an array of stepped wedges, is described. Results from the evaluation in terms of cut-off frequency and non-anechoic areas near the walls are detailed. Fan models are electrically driven to 20,600 RPM in either the inlet mode or exhaust mode to facilitate study of both fore and aft fan noise. Inlet noise characteristics of the first fan tested are discussed and compared to full-scale levels. Turbulence properties of the inlet flow and acoustic results are compared with and without a turbulence reducing screen over the fan inlet
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