1,720,954 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
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
Étude des mécanismes de stimulation de la prolifération des cellules bêta pancréatiques par les acides gras
Get PDFLes îlots de Langerhans, principalement composés de cellules bêta sécrétant l’insuline, jouent un rôle majeur dans l’homéostasie glucidique grâce à leur sécrétion hormonale finement régulée. Dans un contexte d’insulino-résistance associée à l’obésité, la masse fonctionnelle des cellules bêta pancréatiques augmente, en partie grâce à une prolifération accrue. Le diabète de type 2 survient lorsque les mécanismes de compensation échouent et que la sécrétion d’insuline devient insuffisante. Par conséquent, augmenter la prolifération des cellules bêta a été proposée comme approche thérapeutique afin de retarder l’apparition du diabète de type 2.
Parmi les différents facteurs pouvant moduler la prolifération des cellules bêta, les nutriments, en particulier le glucose et les acides gras, jouent un rôle important et plusieurs études chez le rongeur montrent que les nutriments augmentent la prolifération et la masse des cellules bêta avant l’apparition de l’insulino-résistance. De plus, des travaux de notre laboratoire ont montré que l’infusion d’un mélange d’acide gras, le ClinOleic (65% oléate, 20% linoléate et 15% palmitate) et de glucose provoquait une augmentation marquée de la prolifération des cellules bêta chez le rat. L’objectif de cette thèse est donc d’évaluer les mécanismes par lesquels les acides gras stimulent la prolifération des cellules bêta.
Dans un premier article, seul l’oléate, parmi plusieurs acides gras testé, a démonté un effet significatif sur l’augmentation de la prolifération des cellules bêta en présence de glucose ex vivo. La prolifération induite par l’oléate nécessite la formation de sphingolipides à très longue chaîne monoinsaturée, tandis que la perturbation de leur synthèse provoque une diminution de la réponse proliférative. Dans une seconde étude, l’analyse par séquençage d’ARN sur cellules uniques a mis en évidence le rôle important des espèces réactives de l’oxygène, des peroxyrédoxines et du proto-oncogène MYC dans le processus prolifératif des cellules bêta induit par l’oléate. Dans l’ensemble, les travaux présentés dans cette thèse apportent un éclairage nouveau sur le potentiel prolifératif encore énigmatique des cellules bêta pancréatiques et soulignent le rôle des sphingolipides et des espèces réactives de l’oxygène dans ce processus.The islets of Langerhans, mainly composed of insulin-secreting beta cells, plays a major role in glucose homeostasis due to their finely regulated hormone secretion. In a context of insulin resistance associated with obesity, the functional mass of pancreatic beta cells increases, in part due to increased proliferation. Type 2 diabetes occurs when these compensatory mechanisms fail and insulin secretion becomes insufficient. Therefore, increasing beta cell proliferation has been proposed as a therapeutic approach to delay the onset of type 2 diabetes.
Among the various factors that can modulate the proliferation of beta cells, nutrients, in particular glucose and fatty acids, play an important role, and several studies in rodents show that nutrients increase beta-cell proliferation before insulin resistance can be detected. Previous work from our laboratory has shown that infusion of the fatty-acid mixture ClinOleic (65% oleate, 20% linoleate and 15% palmitate) in the presence of glucose markedly increases beta-cell proliferation in rats. The objective of this thesis is to evaluate the underlying mechanisms by which fatty acids stimulate beta-cell proliferation.
In a first study, among several fatty acids tested, only oleate increased beta cell proliferation in presence of glucose ex vivo. Oleate-induced beta-cell proliferation requires the formation of monounsaturated very long chain sphingolipids, while blockade of their biosynthesis dampens the proliferative response. In a second study, single-cell RNA sequencing analysis highlighted the role of reactive oxygen species, peroxiredoxins, and the proto-oncogene MYC in oleate-induced beta cell proliferation.
Overall, the work presented in this thesis sheds new light on the enigmatic proliferative potential of pancreatic beta cells and identifies a role for sphingolipids and reactive oxygen species in this process
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