1,720,956 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
Does the ultrasonic activation of calcium silicate-based sealers affect their physicochemical properties?
No full textEste estudo avaliou a influência da agitação ultrassônica por dez e vinte segundos nas propriedades físico-químicas dos cimentos Bio-C Sealer, BioRoot e Sealer Plus BC. Foram formados três grupos experimentais: sem agitação (NA), com agitação ultrassônica por 10 segundos e com agitação ultrassônica por 20 segundos. Os cimentos foram manipulados de acordo com as instruções dos fabricantes e inseridos em uma seringa de 3 mL adaptada para receber 1 mL a fim de realizar a agitação ultrassônica com inserto ultrassônico 20/.01. Os moldes para as análises físico-químicas foram preenchidos e foram realizados os testes de tempo de presa inicial e final, escoamento, radiopacidade e solubilidade, avaliados de acordo com a especificação ANSI/ADA nº. 57. Também foram realizados testes para avaliação de pH e liberação de íons cálcio com períodos experimentais de 1, 24, 72 e 168 horas com pHmetro e espectrofotômetro colorimétrico, respectivamente. Os dados foram analisados por análise de variância, testes Student-T e Tukey. O tempo de agitação ultrassônica aumentou progressivamente o tempo de presa inicial para todos os cimentos biocerâmicos. Vinte segundos de agitação ultrassônica aumentaram os valores médios de escoamento para Sealer Plus BC, Bio-C Sealer em comparação com nenhuma ativação. A agitação ultrassônica não influenciou a radiopacidade e solubilidade dos cimentos testados. Agitação ultrassônica por 20 segundos aumentou o pH do Sealer Plus BC e Bio-C Sealer em 168h e aumentou a liberação de íons cálcio para Sealer Plus BC e Bio-C Sealer em 168h. Podemos concluir que a agitação ultrassônica por vinte segundos interfere em algumas propriedades físico-químicas dos cimentos à base de silicato de cálcio.This study evaluated the influence of ultrasonic agitation for ten and twenty seconds on the physicochemical properties of Bio-C Sealer, BioRoot and Sealer Plus BC sealers. Three experimental groups were formed: without agitation (NA), ultrasonic agitation for 10 seconds (UA10S) and ultrasonic agitation for 20 seconds (UA20S). The sealers were manipulated according to the manufacturers instructions and inserted into a 3 mL syringe adapted to receive 1 mL in order to perform the ultrasonic agitation with an ultrasonic insert 20/.01. The molds for the physicochemical analyzes were filled and the tests of initial and final setting time, flow, radiopacity and solubility were performed, evaluated according to ANSI/ADA specification nº. 57. Tests were also performed to evaluate pH and calcium ion release with experimental periods of 1, 24, 72 and 168 hours with pHmeter and colorimetric spectrophotometer, respectively. Data were analyzed by analysis of variance, Student-T and Tukey tests. The ultrasonic agitation time progressively increased the initial setting time for all bioceramic sealers. Twenty seconds of ultrasonic agitation increased mean flow values for Sealer Plus BC and Bio-C Sealer compared to no activation. Ultrasonic agitation did not influence the radiopacity and solubility of the tested sealers. Ultrasonic agitation for 20 seconds increased the pH of Sealer Plus BC and BioC Sealer at 168h and increased calcium ion release for Sealer Plus BC and Bio-C Sealer at 168h. We can conclude that ultrasonic agitation for twenty seconds interferes with some physicochemical properties of calcium silicate-based sealers
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
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