1,720,964 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
Structural and functional characterization of PorA and PorH : the two major porins from Corynebacterium glutamicum
No full textPorA (5 kDa) et PorH (7kDa) sont les deux protéines membranaires majeures de la membrane externe de Corynebacterium glutamicum qui appartient au groupe supragénérique des bactéries Gram-positives contenant plusieurs agents pathogènes i.e. Mycobacterium tuberculosis, M. leprae et C. diphtheriae. Les deux protéines forment des canaux ioniques hétéromériques et présentent la particularité d'avoir une modification post-traductionnelle : estérification par l'acide mycolique. Les deux protéines ont été produites dans deux systèmes d'expression : chez C. glutamicum et dans un système acellulaire utilisant des extraits de E. coli. La présence ou l'absence de modification post-traductionnelle, sur les protéines produites in vivo et in vitro a été caractérisée par spectrométrie de masse MALDI-TOF. Les spectres de dichroïsme cellulaire et de RMN de PorA et PorH uniformément marquées et solubilisées en micelles de LDAO sont caractéristiques de protéines mono-disperses, partiellement structurées, et de qualité compatible avec une détermination de structure par RMN. Le test fonctionnel des protéines, par mesure de conductivité ionique après reconstitution dans une membrane lipidique (technique dite de BLM pour " black lipid membrane ") a montré que a) la modification post-traductionnelle de PorA par un acide mycolique est essentielle (contrairement à celle de PorH) b) la présence simultanée de PorA et de PorH est requise pour la formation d'un canal ionique voltage dépendant typique d'une porine. Afin de mieux comprendre l'importance de l'acide mycolique pour l'activité canal ionique, le complexe protéique PorA-PorH a été reconstitué dans son environnement naturel. Les principaux lipides de la membrane externe du C. glutamicum [Tréhalose dimycolate (TDM), tréhalose monomycolate (TMM) et cardiolipide (CL)] ont été extraits et purifiés par chromatographie d'adsorption et échange d'ions, sous forme protonée et sous forme perdeutériée. Après formation de protéoliposomes les propriétés membranaires de TDM seul ou en mélange avec CL ont été étudiées RMN du deutérium, diffusion dynamique de la lumière et microscopie électronique. L'insertion de PorA et PorH dans des vésicules de TDM a permis de mettre en évidence la reconstitution de l'hétéro-oligomère (contrairement aux micelles de LDAO). Ceci ouvre la voie à la détermination de structure 3D du complexe PorA-PorH fonctionnel par RMN solide et/ou liquide.PorA (5 kDa) and PorH (7 kDa) are two major membrane proteins from the outer membrane of Corynebacterium glutamicum which belongs to the suprageneric group of Gram-positive bacteria containing number of human pathogens such as Mycobacterium tuberculosis, M. leprae and C. diphtheriae. Both PorA and PorH have been shown to form heteromeric ion channels and to be post-translationally modified by mycolic acids (a-alkyl, beta-hydroxy fatty acids).
Both proteins were produced in their natural host with mycolic acid modification, as well as in E. coli based continuous exchange cell-free expression system and thus devoid of mycolic acid modification. The presence or absence of mycolic acid modification on in vivo and in vitro expressed proteins was confirmed by MALDI-TOF mass spectrometry. CD and NMR spectra of 15N/13C uniformly labeled PorA and PorH solubilized in LDAO micelles indicated mono-dispersed and partially folded proteins, compatible with structure determination by NMR. However, functional assays (via black lipid membrane ion-channel conductance measurements) confirmed that a complex associating both proteins is required for function and that the mycolic acid modification on PorA (but not PorH), is an absolute requirement for the formation of a voltage dependent ion-channel. To understand further the importance of covalent or non-covalent interaction of their natural lipid environment on the complex formation, the major C. glutamicum outer membrane lipids [Trehalose dimycolate (TDM), Trehalose monomycolate (TMM) and Cardiolipin (CL)] were purified using adsorption and ion exchange chromatography, both in protonated and perdeuterated form. Prior to proteoliposome reconstitution, the membrane forming properties of TDM alone or in mixture with CL were studied by 2H-NMR, Dynamic Light Scattering and Electron Microscopy. Furthermore, after in vitro reconstitution of PorA and PorH in TDM vesicles (and not in LDAO micelles or DMPC vesicles), evidence for the formation of the hetero oligomeric complex was observed. The 3D structure determination, by liquid and/or solid state NMR, of a functional PorA-PorH complex in its natural lipid environment is now feasible
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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