904 research outputs found

    First Results of the 74 MHz VLA-Pie Town Link. Hercules A at Low Frequencies

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    We present the results of the first successful observations of the Pie Town link with the Very Large Array (VLA) at 74 MHz on Hercules A. The improvement in resolution from 25 arcsec to 10 arcsec resolves the helical- and ring-like features seen at higher frequencies. We also present new high dynamic range images of this powerful radio galaxy at 325 MHz. Our low frequency observations confirm the multiple outburst interpretation of the spectral index differences at high frequencies. Comparison between our radio and ROSAT X-ray data does not reveal any association between the X-ray emission from the cluster and the radio lobes. There are no extra regions of radio emission at 74 MHz.Comment: 9 pages, 7 figures, accepted for publication in MNRA

    Bis(4-cyano­phenolato)[hydro­tris­(3,5-dimethyl­pyrazol­yl)borato]nitro­syl­molybdenum(II)–4-hydroxy­benzonitrile–dichloro­methane (1/1/1)

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    In the title compound, [Mo(C15H22BN6)(C7H4NO)2(NO)]·C7H5NO·CH2Cl2, the central MoII atom adopts a distorted cis-MoO2N4 octa­hedral geometry with the hydro­tris­(3,5-dimethyl­pyrazolylborate) anion attached to the metal in an N,N′,N′′-tridentate tripodal coordination mode. Two O-bonded 4-cyano­phenolate anions and a nitrosyl cation complete the coodination of the MoII atom. Two intra­molecular C—H⋯O and one C—H⋯N hydrogen bonds help to establish the configuration of the complex mol­ecule. The crystal structure is stabilized by inter­molecular C—H⋯N and C—H⋯O hydrogen bonds

    (4-tert-Butyl­pyridine)­chlorido[hydro­tris­(3,5-dimethyl­pyrazol-1-yl)borato]nitro­sylmolybdenum(I) dichloro­methane monosolvate

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    In the title compound, [Mo(C15H22BN6)Cl(NO)(C9H13N)]·CH2Cl2, the MoI atom adopts a distorted MoClN5 octa­hedral geometry with the hydro­tris­(3,5-dimethyl­pyrazol­yl)borate anion in an N,N′,N′′-tridentate tripodal (facial) coordination mode. A 4-tert-butyl­pyrine ligand, chloride anion and a nitrosyl cation complement the coodination of the MoI atom and an intra­molecular C—H⋯Cl hydrogen bond helps to stabilize the configuration of the complex mol­ecule. The packing is stabilized by an inter­molecular C—H⋯Cl hydrogen bond involving the complex mol­ecule and the CH2Cl2 solvent mol­ecule

    Genetic variation and possible origins of weedy rice found in California.

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    Control of weeds in cultivated crops is a pivotal component in successful crop production allowing higher yield and higher quality. In rice-growing regions worldwide, weedy rice (Oryza sativa f. spontanea Rosh.) is a weed related to cultivated rice which infests rice fields. With populations across the globe evolving a suite of phenotypic traits characteristic of weeds and of cultivated rice, varying hypotheses exist on the origin of weedy rice. Here, we investigated the genetic diversity and possible origin of weedy rice in California using 98 simple sequence repeat (SSR) markers and an Rc gene-specific marker. By employing phylogenetic clustering analysis, we show that four to five genetically distinct biotypes of weedy rice exist in California. Analysis of population structure and genetic distance among individuals reveals diverse evolutionary origins of California weedy rice biotypes, with ancestry derived from indica, aus, and japonica cultivated rice as well as possible contributions from weedy rice from the southern United States and wild rice. Because this diverse parentage primarily consists of weedy, wild, and cultivated rice not found in California, most existing weedy rice biotypes likely originated outside California

    What’s new? A first appraisal of the Juncker Commission

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    Although still in its early phases, the Juncker Commission has already broken new ground. Not only is Jean-Claude Juncker the first Commission President to be selected by the Spitzenkandidaten process, an extra-constitutional system that has reconfigured the European Union’s institutional balance, but he has transformed the structure and operation of the College in order to create a more political, and therefore more effective, Commission, and made good – so far – on his promise ‘to do better on the bigger things and be small on the small things’. This article examines this three-fold transformation. It looks at the innovations and change associated with the Juncker Commission. It considers what motivated them and how they were achieved, sets them in historical perspective, and discusses their implications for the institutions and for the EU more broadly

    Laser ultrasound for the study of thin sheets

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    Laser ultrasound is now an accepted and mature technology. However it is still seeking its first fully commercial industrial application although there are several potential uses in prototype form. The major advantage of laser ultrasound is that it is a non contact technique and can therefore be used on hot or moving components. The pulsed laser source generates simultaneously longitudinal and shear bulk waves and Rayleigh surface waves. When the material is in the form of a thin sheet the latter propagate as Lamb or plate waves providing the ultrasonic wavelength is greater than the sheet thickness

    Decoration in Praying Hall of Mosque: A Review of Current Literature

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    AbstractThe most intention of decorating the interior of the mosque is to create of feeling remembering Allah. The challenge is to avoid the wasteful as well the negative impact to users. Among of Islamic scholars agreed the decoration in the interior of mosque shall be done in a moderate way since is has not been prohibited in Islam. This paper intended to search the literature on the function of decoration of the interior of the mosque as well its effects towards people either negative or positive way. The significance of this paper is to identify the best way in decorating of the interior of the mosque

    Holographic Screening Length in a Hot Plasma of Two Sphere

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    We study the screening length of a quark-antiquark pair moving in a hot plasma living in two sphere S2S^2 manifold using AdS/CFT correspondence where the background metric is four dimensional Schwarzschild-AdS black hole. The geodesic solution of the string ends at the boundary is given by a stationary motion in the equatorial plane as such the separation length LL of quark-antiquark pair is parallel to the angular velocity ω\omega. The screening length and the bound energy are computed numerically using Mathematica. We find that the plots are bounded from below by some functions related to the momentum transfer PcP_c of the drag force configuration. We compare the result by computing the screening length in the quark-antiquark reference frame where the gravity dual are "Boost-AdS" and Kerr-AdS black holes. Finding relations of the parameters of both black holes, we argue that the relation between mass parameters MSchM_{Sch} of the Schwarzschild-AdS black hole and MKerrM_{Kerr} of the Kerr-AdS black hole in high temperature is given by MKerr=MSch(1a2l2)3/2M_{Kerr}=M_{Sch}(1-a^2l^2)^{3/2}, where aa is the angular momentum parameter.Comment: Major revision: title changed, adding authors, 13 pages, 8 figures, etc. Accepted for publication in European Physical Journal

    The New Political Economy of EU State Aid Policy

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    Despite its importance and singularity, the EU’s state aid policy has attracted less scholarly attention than other elements of EU competition policy. Introducing the themes addressed by the special issue, this article briefly reviews the development of EU policy and highlights why the control of state aid matters. The Commission’s response to the current economic crisis notably in banking and the car industry is a key concern, but the interests of the special issue go far beyond. They include: the role of the European Commission in the development of EU policy, the politics of state aid, and a clash between models of capitalism. The special issue also examines the impact of EU policy. It investigates how EU state aid decisions affect not only industrial policy at the national level (and therefore at the EU level), but the welfare state and territorial relations within federal member states, the external implications of EU action and the strategies pursued by the Commission to limit any potential disadvantage to European firms, and the conflict between the EU’s expanding legal order and national
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