1,721,441 research outputs found

    Some lattice-based scientific problems, expressed in Haskell

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    The paper explores the application of a lazy functional language, Haskell, to a series of grid-based scientific problems---solution of the Poisson equation and Monte Carlo simulation of two theoretical models from statistical and particle physics. The implementations introduce certain abstractions of grid topology, making extensive use of the polymorphic features of Haskell. Updating is expressed naturally through use of infinite lists, exploiting the laziness of the language. Evolution of systems is represented by arrays of interacting streams

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed

    Map showing location of crest-stage and low-flow partial-record gaging stations

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    This digital image was produced in the Summer of 2012 by the Maryland State Archives (MSA) from the original map held by the Maryland Geological Survey (MGS). We are indebted to the staff of the MGS and MSA for helping us make this these images available.This map is Figure 4 from Carpenter, D. H., “Characteristics of Streamflow in Maryland”. Baltimore: Maryland Geological Survey, 1983 (Report of Investigations No. 35)

    Map Showing Location of Gaging Stations Available for low-flow Regression Analysis

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    This digital image was produced in the Summer of 2012 by the Maryland State Archives (MSA) from the original map held by the Maryland Geological Survey (MGS). We are indebted to the staff of the MGS and MSA for helping us make this these images available.This map is Figure 9 from Carpenter, D. H., “Characteristics of Streamflow in Maryland”. Baltimore: Maryland Geological Survey, 1983 (Report of Investigations No. 35)
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