1,720,987 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
Etude du rôle du zinc et des cystéines dans la dimérisation de la protéine FUR (Ferric Uptake Regulator) d'E.coli : une approche structurale par RMN
No full textThe FUR protein (Ferric Uptake Regulator) is a global regulator ubiquitous in Gram-negative bacteria. Binding of Fe2+ in vivo activates the FUR protein for DNA binding. Fe-FUR binds to the promotor of FUR regulated genes, causing their repression. This work consists of an NMR structural study of the non-activated dimer of FUR (2*17 kDa) which contains one zinc ion per monomer. The FUR monomer was also studied and does not contain the zinc ion. Reduction of the cysteines, and binding of zinc to the protein, leads to dimerization. Circular dichroism and NMR showed that folding of the C-terminal domain of the monomer (dimerization domain) occurs upon dimerization. The secondary structure observed in the monomer and the dimer are similar, except for the first residues. In the monomer, these are organized as a helix while they are unfolded in the non-activated dimer. As this first helix is observed in the activated dimer of P.aeruginosa, we propose it plays a role in the regulation mechanism. A truncated protein named FUR1-82 was constructed, purified, and crystallized. Its structure is superimposable onto the N-terminal domain structure of P. aeruginosa FUR and the 1H-15N-HSQC spectra of FUR1-82 and FUR monomer are nearly identical. Binding of the monomer and the dimer to the DNA consensus sequence study, using fluorescence anisotropy, showed that both forms are able to bind DNA specifically, but with different affinities. The monomer has a 5 fold decreased affinity compared to the dimer in presence of excess metal. Overall, the results obtained allowed us to propose a dimerization mechanism of E.coli FUR and an activation mechanism with a role for the N-terminal Α helix.La protéine FUR (Ferric Uptake Regulator) est un régulateur global ubiquitaire chez les bactéries Gram-négatives. Sa liaison au Fe2+, in vivo, entraîne la répression de l'expression des gènes qu'elle contrôle. Ce travail est une étude structurale par RMN de la forme dimérique non activée de FUR d'Escherichia coli, un dimère de 2*17 kDa contenant un ion zinc par monomère. Une forme monomérique oxydée, capable de dimériser en présence de réducteur et de zinc, a également été isolée et étudiée. Le dichroïsme circulaire et la RMN montrent que la dimérisation entraîne une structuration du domaine C-terminal lors de l'incorporation du zinc. Les structures secondaires du domaine N-terminal du monomère et du dimère sont très proches. Seuls les premiers résidus sont structurés en hélice Α dans le monomère et déstructurés dans le dimère non activé. Cette hélice, observée dans le dimère activé de FUR de P. aeruginosa, pourrait jouer un rôle dans le mécanisme de régulation. Une protéine tronquée (FUR1-82) a été construite, purifiée, cristallisée. Sa structure est superposable à celle du domaine N-terminal de FUR de P. aeruginosa et le spectre 1H-15N-HSQC est superposable aux signaux du domaine N-terminal de FUR monomère. L'étude, par anisotropie de fluorescence, de la liaison du monomère et du dimère à l'ADN montre qu'ils se lient spécifiquement à l'ADN en présence de métal, contrairement à la forme tronquée. L'affinité du monomère pour l'ADN est 5 fois plus faible que celle du dimère en excès de métal. L'ensemble de ces données nous a permis de proposer un mécanisme de dimérisation de FUR d'E. coli ainsi qu'un mécanisme d'activation mettant en jeu cette hélice Α N-terminale
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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