922 research outputs found

    Herbivory increases diversification across insect clades.

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    Insects contain more than half of all living species, but the causes of their remarkable diversity remain poorly understood. Many authors have suggested that herbivory has accelerated diversification in many insect clades. However, others have questioned the role of herbivory in insect diversification. Here, we test the relationships between herbivory and insect diversification across multiple scales. We find a strong, positive relationship between herbivory and diversification among insect orders. However, herbivory explains less variation in diversification within some orders (Diptera, Hemiptera) or shows no significant relationship with diversification in others (Coleoptera, Hymenoptera, Orthoptera). Thus, we support the overall importance of herbivory for insect diversification, but also show that its impacts can vary across scales and clades. In summary, our results illuminate the causes of species richness patterns in a group containing most living species, and show the importance of ecological impacts on diversification in explaining the diversity of life

    The Underground Theater presents: “The Community Beneath Our Feet”

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    ReportOur project includes a complete kit to be shared by all interested in the IPM project we have produced. Our goal is to better inform students about soil and the organisms in and on the soil and also help them understand that the way we treat soil and plants makes an impact on our environment. The kit contains: An original play for school age children where the audience becomes characters in the play. A ‘how to video’ to help with background material; IPM information and ideas for developing the play, encouraging the facilitators to make it their own production. Reproducible drawings of organism that the audience participants will wear. An activity book (“The Bug-tivity Newspaper”) that is passed out to the audience. It contains IPM and good-bug, bad-bug information, experiments and other fun activities for the family that helps them understand more about our environment and how the choices we make affect it

    Superanalogs of the Calogero operators and Jack polynomials

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    A depending on a complex parameter kk superanalog SL{\mathcal S}{\mathcal L} of Calogero operator is constructed; it is related with the root system of the Lie superalgebra gl(nm){\mathfrak{gl}}(n|m). For m=0m=0 we obtain the usual Calogero operator; for m=1m=1 we obtain, up to a change of indeterminates and parameter kk the operator constructed by Veselov, Chalykh and Feigin [2,3]. For k=1,12k=1, \frac12 the operator SL{\mathcal S}{\mathcal L} is the radial part of the 2nd order Laplace operator for the symmetric superspaces corresponding to pairs (GL(V)×GL(V),GL(V))(GL(V)\times GL(V), GL(V)) and (GL(V),OSp(V))(GL(V), OSp(V)), respectively. We will show that for the generic mm and nn the superanalogs of the Jack polynomials constructed by Kerov, Okunkov and Olshanskii [5] are eigenfunctions of SL{\mathcal S}{\mathcal L}; for k=1,12k=1, \frac12 they coinside with the spherical functions corresponding to the above mentioned symmetric superspaces. We also study the inner product induced by Berezin's integral on these superspaces

    Requirement specifications for standardized Local Area Networks and applications for Naval Aviation squadrons.

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    This thesis will address unique characteristics and requirements for implementing a Local Area Network (LAN) and standard applications at the Naval Aviation squadron level. The introduction will present the history and basic concept of LAN's at squadrons as well as defining the problem that exists. Examples of Local Area Networks are presented to provide a basic understanding of the technology involved. The organization of Naval Aviation squadrons is discussed to illustrate the high level functional requirements. Areas to be covered in the requirements specifications are then discussed to ensure completeness and the overall success of this concept. Performance, documentation, training, support and security are a few of the issues that are addressed. Complete specifications, a coordinated and well thought out plan and designation of a project manager are critical elements that cannot be ignored if the project is to succeed.http://archive.org/details/requirementspeci00masoLieutenant, United States Navy ReserveApproved for public release; distribution is unlimited

    Estudio de una escultura con inscripción ibérica procedente del santuario del Cerro de los Santos

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    La línea de trabajo sobre imagen en la cultura ibérica ha aportado a la arqueología ibérica excelentes resultados, tanto desde el punto de vista de la dinamización teórica de la disciplina, como en su aplicación concreta al estudio y la interpretación de determinados programas iconográficos en sus contextos arqueológicos (OLMOS 1992, 1996; ARANEGUI 1997, entre otros). Uno de los sujetos de investigación de especial relevancia de esta línea ha sido la religiosidad y sus diversas manifestaciones. En este sentido, los exvotos ibéricos labrados en caliza y bronce (RUIZ BREMÓN 1989a; PRADOS1992), sin olvidar aquellos elaborados en terracota, representan un material de estudio privilegiado

    Alien Registration- Lapoint, Louise (Presque Isle, Aroostook County)

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    https://digitalmaine.com/alien_docs/33513/thumbnail.jp
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