NSDL teaching resources related to “distribution”

In this exercise, students analyze climate data to find areas in the southern United States that are now close to having conditions in which the malaria parasite and its mosquito hosts thrive and then attempt to forecast when areas might become climatically suitable.

The Changing Geographic Distribution of Malaria with Global Climate Warming

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Deserts, one of the four major terrestial biomes, cover about one-fifth of Earth’s land area. This interactive slide presentation shows some aspects of deserts, including dunes, desert-adapted plants, oases, and sculpted rock formations. There is also a map showing the distribution of the world’s deserts. A background essay and discussion questions are included.

Deserts

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This is a research paper on the occurrence of Waulsortian mounds, also known as Tournasian-early Visean mud mounds. These features are unique because unlike other carbonate buildups in the stratigraphic record, they lack an identifiable frame-building organism. These mounds were the only type of organic buildup known to have formed during the period of strongly suppressed reef building that followed the Late Devonian collapse of the reef-building biotic community.

Probable Influence of Geography on the Development and Global Distribution of Tournasian-early Visean Age (Waulsortian and Waulsorian-like) Mud Mounds

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This report, part of a series that analyzes population and housing data collected from the census of 2000, highlights population size and distribution changes between 1990 and 2000 in regions, states, counties, and large cities. Data, maps, and discussion are used to examine the size of the population increase, which states and regions experienced the largest growth, where the largest proportion of the population lives, and how the population changed in the ten largest American cities.

Population Change and Distribution: 1990 to 2000

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Figure 2: Subcellular distribution of the seven phosphoinositides. Legend: A: each phosphoinositide is thought to have its own predominant subcellular localization, as indicated (modified from a drawing by Andrea Raimondi). B : localization of PI(4,5)P2, PI4P, and PI3P, as revealed by transfected GFP fusion of protein modules that selectively bind these phosphoinositides. The localization of the fusion protein is shown in green: plasma membrane for PI(4,5)P2, the Golgi complex for PI4P, and endosomes for PI3P. (Reprinted with permission from Ref. 24.) From McCrea HJ, De Camilli P.

Mutations in Phosphoinositide Metabolizing Enzymes and Human Disease – Figure 2: Subcellular distribution of the seven phosphoinositides

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A culture area is a region of the world in which people share similar cultural traits. Researchers may define a culture area by plotting the distribution of a single cultural trait, such as maize agriculture, and uniting all the communities that share this trait into a single cultural area. Alternatively, researchers sometimes choose to group communities into a culture area because the communities share several distinctive cultural traits, known as having a common cultural complex.

Friedrich Ratzel, Clark Wissler, and Carl Sauer: Culture Area Research and Mapping

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One of the leading geographers of the first half of the twentieth century, Vernor C. Finch played a major role in reshaping the way spatial information is cataloged and used. A longtime professor at the University of Wisconsin, Finch is best remembered for two innovations. One was the widely-used dot map technique, first used in his 1917 book, Geography of World Agriculture, to show distributions of agricultural variables over a large geographic area. The other was known as the “fractional code,” which allowed for the collection of vast amounts of data for relatively small areas.

Vernor C. Finch: The "Fractional Code" for Land Use Mapping, 1933

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Through his publications in the sociological literature, Doreian accomplished two primary objectives. First, he introduced his colleagues to advanced estimation methods of spatial interaction (Doreian 1976) currently in practice by statisticians, geographers, and mathematical ecologists. Second, Doreian (1980, 1981) showed empirically the importance of incorporating these methods in sociological research. Together, these two accomplishments brought an increased capability for sociologists to perform analyses with spatial data.

Patrick Doreian: Modeling Sociological Processes Using Spatially Distributed Data

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This chapter continues the examination and clarification of concepts relating to point objects, for which as argued in Chapter 1, appropriate, complex/ second order, concepts relate to words like ‘distribution’, ‘dispersion’, ‘density’, ‘pattern’ and ‘scale’ and, at higher level still, third order concepts relating to point process models, stationarity and isotropy/anisotropy.

Patterns of point objects (Unwin, Chapter 3)

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