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
Développement d'une nouvelle approche pour la séparation du thorium des éléments de terres rares dans des lixiviats miniers
No full textLa demande pour les éléments de terres rares (ETR) ne cesse d'augmenter avec les années ce qui ne devrait pas s'essouffler à moyen long terme puisque leurs propriétés chimiques sont essentielles pour de nombreuses technologies vertes et durables qui réduisent la consommation d'énergie fossile et les gaz à effet de serre. Comme le thorium et l'uranium possèdent des caractéristiques similaires aux ETR, ceux-ci sont aussi présents dans les réseaux cristallins des minerais d'ETR. Par le fait même, le lixiviat résultant de l'extraction des ETR des minerais peut contenir ces actinides. Leur présence n'est pas souhaitable lors de la production d'ETR dû au caractère radioactif de ces éléments. Le travail décrit dans le cadre de ce mémoire traite de la séparation du thorium des éléments de terres rares au sein de lixiviats miniers. Pour retirer celui-ci du lixiviat, la stratégie de l'extraction au point trouble a été envisagée. L'étude s'est basée sur trois principaux lixiviats miniers. Search Minerals a mandaté SGS Canada inc. pour faire des essais pilotes "acid baking/water leach". De ceux-ci en est résulté, le lixiviat en milieu sulfurique. Un lixiviat en milieu nitrique ainsi qu'un lixiviat en milieu chlorhydrique issu d'essais en laboratoire à CanmetMINES ont également été utilisés. Les extractions au point trouble classiques traitent des liquides ayant des matrices moins chargées en ions et des concentrations en analyte beaucoup plus faibles que dans les lixiviats miniers. L'objectif du développement de la méthode d'extraction au point trouble était d'adapter la méthode à une matrice de lixiviats miniers en plus de concentrer le thorium dans la phase riche en surfactant. Des huit ligands testés, deux se sont démarqués. Le P,P'-di-(2-éthylhexyle) méthane diphosphonique acide (H₂DEH[MDP]) est celui possédant le potentiel d'extraction le plus important permettant sélectivement le transfert du Th dans les micelles mixtes dans un lixiviat sulfurique. L'acide éthylènediaminetétraméthylène phosphonique (EDTMP) a aussi prouvé son potentiel à séparer le Th des ETR dans un lixiviat chlorhydrique. L'optimisation des systèmes en changeant les concentrations en réactifs utilisés a été effectuée. Les analyses élémentaires ont montré que cette technique était prometteuse pour une application pour le domaine minier. L'exploration de l'extraction séquentielle du Th suivie de la séparation et préconcentration des ETR lourds des ETR légers avec l'isopropyl diglycolamide (i(pr)-DGA) a été réalisée. Les résultats préliminaires ont montré la capacité potentielle de la technique à réaliser la séparation.The demand for rare earth elements (REE) continues to increase over the years and should not slow down in the medium to long-term horizon since their chemical properties are essential for many green and sustainable technologies which mitigate the consumption of fossil energy and greenhouse gases. Since thorium and uranium exhibit similar characteristics to REE, these are also present in the mineral lattice of REE ores. As a result, the leachate from the extraction of REE from minerals may contain actinides. Their presence is undesirable during the production of REE due to the radioactive nature of these elements. The work described in this thesis deals with the separation of thorium from the rare earth elements of mining leachates. To remove them from the leachate, the cloud point extraction strategy was considered. The study was based on three main mining leachates. Search Minerals commissioned SGS Canada inc. to carry out acid baking/water leach pilot tests. From these resulted the sulfuric medium leachate. A nitric medium leachate as well as a hydrochloric medium leachate from laboratory testing at CanmetMINING have also been used. Classic cloud point extractions are typically applied to solutions with less ionic content and much lower analyte concentrations than in mining leachates. The goal of developing this new cloud point extraction method was to concentrate the thorium in the surfactant-rich phase. Of all the ligands tested, two stood out. The P, P - di- (2-ethylhexyl) methane diphosphonic acid (H₂DEH [MDP]) is the one with the greatest extraction potential, allowing the selective transfer of Th into mixed micelles in a sulfuric leachate. The ethylene diamine tetra (methylene phosphonic acid) (EDTMP) has also demonstrated its potential to separate Th from REE in hydrochloric leachate. The optimization of the systems by changing the concentrations of reagents used was carried out. The elemental analyses showed that this technique was promising for an application in mineral processing. The exploration of the sequential extraction of Th followed by the separation and preconcentration of heavy REE from light REE with isopropyl diglycolamide (i(pr)-DGA) was carried out. Preliminary results showed its potential ability to perform this task
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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