6,215 research outputs found

    Microlensing path parametrization for Earth-like Exoplanet detection around solar mass stars

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    We propose a new parametrization of the impact parameter u0 and impact angle {\alpha} for microlensing systems composed by an Earth-like Exoplanet around a Solar mass Star at 1 AU. We present the caustic topology of such system, as well as the related light curves generated by using such a new parametrization. Based on the same density of points and accuracy of regular methods, we obtain results 5 times faster for discovering Earth-like exoplanet. In this big data revolution of photometric astronomy, our method will impact future missions like WFIRST (NASA) and Euclid (ESA) and they data pipelines, providing a rapid and deep detection of exoplanets for this specific class of microlensing event that might otherwise be lost.Comment: 8 pages, 7 figures, accepted to be published in The Astronomical Journa

    On the link between rotation, chromospheric activity and Li abundance in subgiant stars

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    The connection rotation-CaII emission flux-lithium abundance is analyzed for a sample of bona fide subgiant stars, with evolutionary status determined from HIPPARCOS trigonometric parallax measurements and from the Toulouse-Geneva code.Comment: 9 pages, 8 figure

    Onciderini Thomson, 1860 (Coleoptera: Cerambycidae: Lamiinae) types of the Museum fĂĽr Naturkunde - Leibniz Institute for Evolution and Biodiversity Science, Berlin (ZMHB)

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    The primary types of Onciderini Thomson, 1860 (Coleoptera: Cerambycidae: Lamiinae) of the Museum fĂĽr Naturkunde - Leibniz Institute for Evolution and Biodiversity Science, Berlin (ZMHB), Germany, are catalogued and illustrated. Data on the original combination, current name, gender, and type locality are verified and presented. There are 16 primary types of Onciderini including four in Oncideres Lacordaire, 1830 and three in Trestonia Buquet, 1859. Of the 16 primary types, seven were described by Ubirajara R. Martins, four by Wilhelm Ferdinand Erichson, and three by Ernst Friedrich Germar

    Onciderini Thomson, 1860 (Coleoptera: Cerambycidae: Lamiinae) types of the Museum fĂĽr Naturkunde - Leibniz Institute for Evolution and Biodiversity Science, Berlin (ZMHB)

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    The primary types of Onciderini Thomson, 1860 (Coleoptera: Cerambycidae: Lamiinae) of the Museum fĂĽr Naturkunde - Leibniz Institute for Evolution and Biodiversity Science, Berlin (ZMHB), Germany, are catalogued and illustrated. Data on the original combination, current name, gender, and type locality are verified and presented. There are 16 primary types of Onciderini including four in Oncideres Lacordaire, 1830 and three in Trestonia Buquet, 1859. Of the 16 primary types, seven were described by Ubirajara R. Martins, four by Wilhelm Ferdinand Erichson, and three by Ernst Friedrich Germar

    A new genus and seven new species of Onciderini Thomson, 1860 (Coleoptera: Cerambycidae: Lamiinae) from Central and South America

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    Thomsonista Nearns and Nascimento, a new genus of Onciderini Thomson, 1860 (Coleoptera: Cerambycidae: Lamiinae), is described and illustrated. Seven new species of Onciderini are described and illustrated: Hesychotypa antonkozlovi from Ecuador; Hesychotypa danilevskyi from Panama; Lingafelteria pandolfii from Brazil; Oncideres antonkozlovi and Oncideres erwini from Peru; Oncideres johnmarvini from Costa Rica and Panama; and Thomsonista antonkozlovi from Colombia. Thomsonista Nearns y Nascimento, un nuevo género de Onciderini Thomson, 1860 (Coleoptera, Cerambycidae, Lamiinae), es descrito e ilustrado. Siete nuevas especies de Onciderini son descritas e ilustradas: Hesychotypa antonkozlovi de Ecuador; Hesychotypa danilevskyi de Panamá; Lingafelteria pandolfii de Brasil; Oncideres antonkozlovi y Oncideres erwini de Perú; Oncideres johnmarvini de Costa Rica y Panamá; y Thomsonista antonkozlovi de Colombia. Note: a higher res version (15 MB) is attached below as supplementary file

    Estimativas de parâmetros genéticos de acessos de Myrciaria dubia por marcadores fenotípicos.

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    O camucamuzeiro (Myrciaria dubia), pertencente à família Myrtaceae, é uma espécie nativa da Amazônia que está em processo de domesticação. O objetivo deste trabalho foi estimar parâmetros genéticos de acessos de camucamuzeiro do Banco Ativo de Germoplasma da Embrapa Amazônia Oriental, por meio de marcadores fenotípicos. Foram avaliados 4? acessos, por meio da amostragem de 40 frutos maduros (epicarpo totalmente roxo) por acesso, nos quais foram mensurados sete caracteres? massa de fruto, comprimento de fruto, diâmetro de fruto, peso da casca, espessura da casca, número de sementes e peso de sementes. Os caracteres, massa de frutos e espessura da casca contribuíram com mais de ?0% para a dissimilaridade. A herdabilidade foi alta para todos os caracteres com destaque para a massa e o diâmetro de fruto, que também apresentaram maiores correlações genéticas. Verificou-se que há variabilidade entre os acessos do BAG de camucamuzeiro e que devido às correlações significativas entre as variáveis podem-se adotar métodos de seleção indireta como ferramenta auxiliar no processo de domesticação e melhoramento desta espécie

    Mineração em metadados aplicados ao processo de desenvolvimento de coleções

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    The increasing of the new scientific areas, along with the multitude of information items, it's pushing the librarians to find creatively novel ways to gather information for the development of the collection under their responsability. This must definitely change the usual practice of these professionals towards mastering moderns IT tools in order to better analyse a huge volume of data in a shorter amount of time. Hence, this paper discusses a proposal of building metadata of the syllabus plans, within a university to easy the minering some important information out of them as part of a master collection development policy
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