1,720,968 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Variations on the Author
Get PDF“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
Get PDFWe 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
Modelling actual and potential wind erosion risk by using readily available data on weather elements and GIS : "a pilot study from Denmark and Switzerland"
Get PDFWind erosion is a complex process which is affected generally by the combined impact of wind erosivity and soil erodibility. According to the complexity of the wind erosion process, the main aim of this research was to design a practical model to predict potential and actual wind erosion risk based on spatial distribution of wind erosivity and soil erodibility. For representation of the potential and actual wind erosion risk in this study, two pilot countries with very different environmental settings were selected; Denmark and Switzerland. In order to be able to implement the model even in areas with minimal data availability, the structure of the GIS-based model was designed for a limited number of key parameters, which can be easily accessed even in regions with inadequate data. Three basic aspects distinguish the proposed model from other models:
1) Separation of wet- and dry-times is taken into account for the wind data analysis;
2) The impact of climate change is considered for factors that are used in the model;
3) Running the model for given return periods based on extreme wind velocity analysis.
The soil moisture content is one of the most important and dynamic factors determining soil resistance to wind erosion, because it affects threshold wind velocities for particle detachment. Presence or absence of moisture in the soil should therefore, be included in wind erosion risk assessments. In order to include soil moisture conditions into the wind data analysis, a sub-model was developed to separate wet and dry periods in weather time series. Weather data and soil moisture content collected during one year in Foulum were used to calibrate the model.
The reason why soil moisture conditions were considered for the wind data analysis was the theory that using wind data for calculation of wind frequency distributions regardless of the status of soil moisture would lead to an overestimation of wind erosion. To confirm or reject this hypothesis, the frequency distribution of wind velocity in conventional method (all-times) and proposed method (dry-times) was compared by using the pairwise Wilcoxon test. The results showed that in 99.6% and 97.1% of tests the difference between two distributions were significant at 99% confidence level for Denmark and Switzerland respectively. Change detection analysis of wind erosivity maps, revealed that 56.02% and 30.63% of the territory of Denmark and Switzerland experience an overestimation of wind erosivity, if the conventional approach would be used. However, underestimation was also observes in considerable parts of these countries, but almost all of these areas were located in regions, which are not prone to wind erosion.
To investigate the impact of climate change on various wind factors, the Mann-Kendall trend test and the Sen’s slope estimator method for detecting the trend and estimating its magnitude were used. The results revealed that, in general, most wind factors experience a slightly decreasing trend in both countries. The median of trends of each input factor was considered to assess the impact of climate change on wind erosion risk modeling.
For running the model according to a given return period it was necessary to analyzed extreme wind velocities and to extract return levels for desired return periods. For this goal the Peak Over Threshold (POT) method was considered and the time series was fitted by the Generalized Pareto distribution (GPD) model. To ensure the independence of the extracted extreme values, a peak over threshold identifier algorithm was designed based on the detection of windiness of periods.
According to the results of above mentioned investigations, a GIS-based model was designed and successfully implemented to generate spatio-temporal distributions of potential and actual wind erosion risk by using a two-dimensional minimum curvature spline technique to spatially interpolate data, as well as a fuzzy overlay technique to combine fuzzy membership rasters.
The results of model in Switzerland confirmed that, wind erosion is not a threat in this country and only in limited areas of croplands (1.7% of croplands) the risk of wind erosion was estimated to be high. In Denmark 11.48% of total land surface was ranked in the class of high actual wind erosion risk, which are generally located in the north-west and south-west of Jutland peninsula as well as north of Vendsyssel-Thy and Zealand.
The spatial distribution of actual wind erosion risk in Denmark revealed that almost all of the estimated high risks occurs in “Croplands” and “barren or sparsely vegetated” lands, which included 18.4% and 10.3% of these land types respectively. Therefore, it should be emphasized that the role of human activities can have a significant impact on the increase or decrease of wind erosion risk in both countries
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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