3,050 research outputs found

    The Singing Insects of Michigan

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    Excerpt: The so-called singing insects are all those that make loud, rhythmical noises. They include members of three groups of Orthoptera (Gryllidae, Tettigoniidae, and Acridoidea) and one family of Homoptera (Cicadidae). There are about 300 noisy species in these four groups in eastern North America, perhaps a thousand in all of North America, and 25-30 thousand in the entire world. Only about 1000 of the world species have been studied in any detail, mostly in North America, Europe, Japan, and Australia

    Word Adjacency Graph Modeling: Separating Signal From Noise in Big Data

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    There is a need to develop methods to analyze Big Data to inform patient-centered interventions for better health outcomes. The purpose of this study was to develop and test a method to explore Big Data to describe salient health concerns of people with epilepsy. Specifically, we used Word Adjacency Graph modeling to explore a data set containing 1.9 billion anonymous text queries submitted to the ChaCha question and answer service to (a) detect clusters of epilepsy-related topics, and (b) visualize the range of epilepsy-related topics and their mutual proximity to uncover the breadth and depth of particular topics and groups of users. Applied to a large, complex data set, this method successfully identified clusters of epilepsy-related topics while allowing for separation of potentially non-relevant topics. The method can be used to identify patient-driven research questions from large social media data sets and results can inform the development of patient-centered interventions

    The evolution of genitalia and mating behavior in crickets (Gryllidae) and other Orthoptera

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    http://deepblue.lib.umich.edu/bitstream/2027.42/56377/1/MP133.pd

    Boundedness properties of fermionic operators

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    The fermionic second quantization operator dΓ(B)d\Gamma(B) is shown to be bounded by a power Ns/2N^{s/2} of the number operator NN given that the operator BB belongs to the rr-th von Neumann-Schatten class, s=2(r−1)/rs=2(r-1)/r. Conversely, number operator estimates for dΓ(B)d\Gamma(B) imply von Neumann-Schatten conditions on BB. Quadratic creation and annihilation operators are treated as well.Comment: 15 page
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