1,721,032 research outputs found
Aluminum and microplastic release from reflective agricultural films disrupt microbial communities and functions in soil
No full textSubsurface colloids : stability, sampling, and transport under gravitational and centrifugal accelerations
Full text linkThesis (Ph.D.), Department of Crop and Soil Sciences, Washington State UniversityDepartment of Crop and Soil Sciences, Washington State Universit
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Sorption and its effects on transport of organic dyes and cesium in soils
Full text linkThesis (Ph.D.), Department of Crop and Soil Sciences, Washington State UniversityDepartment of Crop and Soil Sciences, Washington State Universit
Laboratory column technique for the measurement of colloid transport in variably-saturated porous media
Full text linkThesis (M.S.), Soil Science, Washington State UniversityDepartment of Crop and Soil Sciences, Washington State Universit
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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Leaching of nutrients and copper from compost in bioretention systems by intermittent rainstorms
Full text linkStormwater runoff from impervious surfaces such as rooftops, parking lots, and roadways can pose a threat to receiving waters through transport of dissolved and particulate contaminants. Bioretention systems are engineered systems that rely on vegetation and mixtures of soil, sand, and compost to filter stormwater runoff by removing contaminants and modulating discharge. Studies have shown, however, that bioretention systems can leach metals and nutrients, and compost is thought to contribute to this leaching. In order to safely implement bioretention systems for stormwater management, it is crucial to determine the composition of compost leachate. This thesis reports on the leaching of chemical constituents from compost following intermittent rainstorms. The specific objectives of this thesis were to (1) characterize the chemical properties of compost leachate during a single rainstorm as a function of time, (2) characterize the chemical properties of compost leachate during sequential rainstorms, and (3) compare leachate from mature composts of two different ages. Columns of 6- and 24-months-old compost were constructed in triplicate, and irrigated with deionized water to simulate a 6-month, 24-hour storm in the Seattle-Tacoma region. Each sample was analyzed for water quality parameters including pH, electrical conductivity (EC), particulate concentration, dissolved organic carbon (DOC), and surface tension. In addition to these parameters, composite samples from selected storms were analyzed for total Kjeldahl nitrogen, nitrate/nitrite, total and ortho-phosphorus, and total and dissolved copper concentrations. Results indicate a decreasing trend in EC, DOC, nitrogen, phosphorus, and copper in the leachate following successive storms. Each new storm event caused an initial peak in EC and DOC concentrations in the leachate. A mass balance of copper indicates that less than 3% of the original copper content from both composts leached out after nine storm events. Nonetheless, copper concentrations exceeded regulatory discharge standards. Although not always significant, the 6-months compost leached higher amounts of constituents, including dissolved organic carbon and copper, than the 24-months compost. The major results of this thesis show that compost serves as a sustained source of leaching, regardless of age
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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