911 resultados para Railroad tracks Queensland
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Magdeburg, Univ., Fak. für Naturwiss., Diss., 2014
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Climate change has been taking place at unprecedented rates over the past decades. These fast alterations caused by human activities are leading to a global warming of the planet. Warmer temperatures are going to have important effects on vegetation and especially on tropical forests. Insects as well will be affected by climate change. This study tested the hypothesis that higher temperatures lead to a higher insect pressure on vegetation. Visual estimations of leaf damage were recorded and used to assess the extent of herbivory in nine 0.1ha plots along an altitudinal gradient, and therefore a temperature gradient. These estimations were made at both a community level and a species level, on 2 target species. Leaf toughness tests were performed on samples from the target species from each plot. Results showed a strong evidence of increasing insect damage along increasing temperature, with no significant effect from the leaf toughness.
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Distinguishing subpopulations in group behavioral experiments can reveal the impact of differences in genetic, pharmacological and life-histories on social interactions and decision-making. Here we describe Fluorescence Behavioral Imaging (FBI), a toolkit that uses transgenic fluorescence to discriminate subpopulations, imaging hardware that simultaneously records behavior and fluorescence expression, and open-source software for automated, high-accuracy determination of genetic identity. Using FBI, we measure courtship partner choice in genetically mixed groups of Drosophila.
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This paper investigates the factors in_uencing grade performance in two different high school tracks (academic and vocational), including the effect of the amount of work achieved while studying. The empirical strategy analyzes grade progression through the outcomes, passing, repeating and dropping out, conditioning on previous outcomes, and dealing with the endogeneity introduced by the working variable. The analysis is based on a unique Spanish data with information on schooling and labor histories. Findings show that working reduces performance in both tracks, mainly during the first year, although the ffects are less detri- mental in the vocational path. Additionally, good performance in compulsory education, at- tending a private high school, or having high-educated parents improve outcomes, particularly in academic high school.
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Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Rail Transportation.
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Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Rail Transportation.
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Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Rail Transportation.
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Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Rail Transportation.
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Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Rail Transportation.
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Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Rail Transportation.
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Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Rail Transportation.
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Quarterly newsletter of the Iowa Department of Transportation's Office of Rail Transportation.
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Quarterly newsletter of the Iowa Department of Transportation's Office of Rail Transportation.
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Quarterly newsletter of the Iowa Department of Transportation's Office of Rail Transportation.
