100,379 research outputs found

    Attraction of \u3ci\u3ePedilus Lugubris\u3c/i\u3e (Coleoptera: Pyrochroidae) to \u3ci\u3eEpicauta Murina\u3c/i\u3e and \u3ci\u3eEpicauta Fabricii\u3c/i\u3e (Coleoptera: Meloidae) and New Food Plant Records for \u3ci\u3eEpicauta\u3c/i\u3e Spp.

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    Pedilus lugubris was found associated with Epicauta murina feeding on Lathyrus venosus foliage and with E. fabricii feeding on Lupinus perennis flowers. Epicauta cinerea and E. funebris were found feeding on foliage of Anemone canadensis and Physalis heterophylla, respectively. This is the first reported association of P lugubris with any species of Epicauta, and the first reported use of Lathyrus venosus by E. murina, of Lupinus perennis by E. fabricii, of Anemone canadensis by E. cinerea and of Physalis heterophylla by E. funebris

    The Alien \u3ci\u3eHippodamia Variegata\u3c/i\u3e (Coleoptera: Coccinellidae) Quickly Establishes Itself Throughout Wisconsin

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    (excerpt) Hippodamia variegata (Goeze) (Coleoptera: Coccinellidae) is a Palaearctic species that was first reported to be established in the Nearctic near Montreal, Quebec, in 1984 (Gordon 1987). Since then, this small beetle has been expanding its range in North America, a process summarized by Gardiner and Parsons (2005). It was first reported from Michigan in 2005 (Gardiner and Parsons 2005) and from Ohio in 2007 (Pavuk et al. 2007)

    Comparison of Compression Schemes for CLARA

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    CLARA (Compact Linear Advanced Research Accelerator)at Daresbury Laboratory is proposed to be the UK's national FEL test facility. The accelerator will be a ~250 MeV electron linac capable of producing short, high brightness electron bunches. The machine comprises a 2.5cell RF photocathode gun, one 2 m and three 5 m normal conducting S-band (2998MHz) accelerating structures and a variable magnetic compression chicane. CLARA will be used as a test bed for novel FEL configurations. We present a comparison of acceleration and compression schemes for the candidate machine layout.Comment: 3 pages, 5 figures, IPAC 201

    In-medium electron-nucleon scattering

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    In-medium nucleon electromagnetic form factors are calculated in the quark meson coupling model. The form factors are typically found to be suppressed as the density increases. For example, at normal nuclear density and Q2∼0.3GeV2Q^2 \sim 0.3 { GeV}^2, the nucleon electric form factors are reduced by approximately 8% while the magnetic form factors are reduced by only 1 - 2%. These variations are consistent with current experimental limits but should be tested by more precise experiments in the near future.Comment: 14 pages, latex, 3 figure

    Carrion Beetles (Coleoptera: Silphidae) of Wisconsin

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    The first comprehensive faunal survey of the carrion beetles (Coleoptera: Silphidae) of Wisconsin is presented. Six genera and 14 species are recorded from the state, including a new state record, Heterosilpha ramosa (Say). Nicrophorus americanus Olivier was not recovered during this study. An annotated checklist includes species-specific geographical and temporal distributions, remarks on foods and habitat, and counties of specimen collections for each species

    Mapping biodiversity value worldwide: combining higher-taxon richness from different groups

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    Maps of large-scale biodiversity are urgently needed to guide conservation, and yet complete enumeration of organisms is impractical at present. One indirect approach is to measure richness at higher taxonomic ranks, such as families. The difficulty is how to combine information from different groups on numbers of higher taxa, when these taxa may in effect have been defined in different ways, particularly for more distantly related major groups. In this paper, the regional family richness of terrestrial and freshwater seed plants, amphibians, reptiles and mammals is mapped worldwide by combining: (i) absolute family richness; (ii) proportional family richness; and (iii) proportional family richness weighted for the total species richness in each major group. The assumptions of the three methods and their effects on the results are discussed, although for these data the broad pattern is surprisingly robust with respect to the method of combination. Scores from each of the methods of combining families are used to rank the top five richness hotspots and complementary areas, and hotspots of endemism are mapped by unweighted combination of range-size rarity scores

    Self-magnetic compensation and Exchange Bias in ferromagnetic Samarium systems

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    For Sm(3+) ions in a vast majority of metallic systems, the following interesting scenario has been conjured up for long, namely, a magnetic lattice of tiny self (spin-orbital) compensated 4f-moments exchange coupled (and phase reversed) to the polarization in the conduction band. We report here the identification of a self-compensation behavior in a variety of ferromagnetic Sm intermetallics via the fingerprint of a shift in the magnetic hysteresis (M-H) loop from the origin. Such an attribute, designated as exchange bias in the context of ferromagnetic/antiferromagnetic multilayers, accords these compounds a potential for niche applications in spintronics. We also present results on magnetic compensation behavior on small Gd doping (2.5 atomic percent) in one of the Sm ferromagnets (viz. SmCu(4)Pd). The doped system responds like a pseudo-ferrimagnet and it displays a characteristic left-shifted linear M-H plot for an antiferromagnet.Comment: 7 pages and 7 figure

    Three-body recombination in a three-state Fermi gas with widely tunable interactions

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    We investigate the stability of a three spin state mixture of ultracold fermionic 6^6Li atoms over a range of magnetic fields encompassing three Feshbach resonances. For most field values, we attribute decay of the atomic population to three-body processes involving one atom from each spin state and find that the three-body loss coefficient varies by over four orders of magnitude. We observe high stability when at least two of the three scattering lengths are small, rapid loss near the Feshbach resonances, and two unexpected resonant loss features. At our highest fields, where all pairwise scattering lengths are approaching at=−2140a0a_t = -2140 a_0, we measure a three-body loss coefficient L3≃5×10−22cm6/sL_3 \simeq 5\times 10^{-22} \mathrm{cm}^6/\mathrm{s} and a trend toward lower decay rates for higher fields indicating that future studies of color superfluidity and trion formation in a SU(3) symmetric Fermi gas may be feasible
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