27,887 research outputs found

    Involution products in Coxeter groups

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    For W a Coxeter group, let = {w ∈ W | w = xy where x, y ∈ W and x 2 = 1 = y 2}. It is well known that if W is finite then W = . Suppose that w ∈ . Then the minimum value of ℓ(x) + ℓ(y) – ℓ(w), where x, y ∈ W with w = xy and x 2 = 1 = y 2, is called the excess of w (ℓ is the length function of W). The main result established here is that w is always W-conjugate to an element with excess equal to zero

    Technology as an economic catalyst in rural and depressed places in Massachusetts

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    This paper uses case studies, including two cities (Lynn and New Bedford), a sub-city district (Roxbury) and two towns in rural Franklin County (Greenfield and Orange), to examine the role of technology as a potential economic catalyst in rural and depressed places in Massachusetts. Though the five target areas vary in size, density, geographic area, demographic characteristics and economic resources, each exhibits chronic patterns of economic distress related to the decline of manufacturing, construction and other key industries

    A study of the early detection of insect infestations and density/distribution of host plants

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    There are no author-identified significant results in this report

    A study of the early detection of insect infestations and density/distribution of host plants

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    The author has identified the following significant results. With comparative observations of film types and seasonal influences on reflectance characteristics, many crop varieties can be identified. This study shows that citrus, sugar cane, brush, some winter vegetables, and grain crops could be identified. Vegetative patterns in border areas can be detected. This information can be useful in detecting avenues of entry of pest species and areas of stress that require vigilance in stopping the spread of destructive species. Influence of some environmental factors on crops that may be confused with pest injury, or related factors, can be detected and identified with Skylab data (S-190B)

    A study of the early detection of insect infestations and density/distribution of host plants

    Get PDF
    There are no author-identified significant results in this report

    A study of the early detection of insect infestations and density/distribution of host plants

    Get PDF
    There are no author-identified significant results in this report

    A study of early detection of insect infestations and density/distribution of host plants

    Get PDF
    There are no author-identified significant results in this report
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