1,720,972 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
Environment and complex lifecycle parasites : influence of biotic and abiotic factors in the distribution of acanthocephalan and their behavioural manipulation
No full textLa position des parasites manipulateurs dans les réseaux trophiques, dépendante et à l’interface de plusieurs espèces hôtes « libres » dans l’écosystème, les rendrait plus sensibles aux modifications de leur environnement. Nos résultats ont démontré que les fortes abondances de cystacanthes et d’adultes P. laevis sont retrouvées dans des eaux à forte pollution bactériologique et sont également corrélées avec les fortes abondances leur hôte intermédiaire G. pulex et une faible biodiversité d’invertébrés benthiques et de poissons. Les hôtes G. pulex et Squalius cephalus tolérants et abondants permettent à P. laevis de proliférer même dans un milieu fortement pollué. Les observations comportementales ont démontré que les G. pulex infectés présentent une baisse de la photophobie, une plus forte attraction vis-à-vis de la surface de l’eau, et des déplacements accrus en eau courante. De plus, nous avons prouvé que la manipulation comportementale de P. laevis sur son hôte était effective même dans des conditions de forte pollution saline. L’intensité de la manipulation n’est pas influencée par des changements de la température de l’eau, de la densité de G. pulex ou encore de la présence de S. cephalus. In fine, ces travaux de recherche apportent des informations complémentaires sur la compréhension de l’influence de l’écosystème, sur l’écologie et la transmission des acanthocéphales. Ils démontrent également la nécessité d’un réalisme accru des expérimentations en milieux contrôlés et ouvrent enfin de nouvelles perspectives sur l’utilité des parasites manipulateurs au sein des écosystèmes tant sur des aspects fonctionnels que d’indication de qualité des milieuxThe position of manipulative parasites in trophic networks is dependent of several free host species in the ecosystem and make them more sensitive to changes in their environment. Our results attest that the distribution of acanthocephalans parasites was influenced by the quality of the ecosystem. The high abundances of cystacanths and adults P. laevis were correlated with high bacteriological pollution and were also correlated with high abundance of its G. pulex intermediate host and with low fish and invertebrate species diversity. The choice of tolerant and abundant G. pulex and S. cephalus hosts allows P. laevis to thrive even in heavy polluted environments. Moreover our results in laboratory demonstrate the multidimensional nature of the phenotypic alterations induced by P. laevis in G. pulex. Infected G. pulex were more photophilous, had a greater water surface attraction, and increased their distance cover in running water. In addition, we have shown that P. laevis could maintain their capacity to manipulate their host despite salt pollution. We also find that the intensity of P. laevis manipulation was not influenced by changes in temperature, G. pulex conspecifics presence and S. cephalus cues. This study provide new information about the influence of the ecosystem on the ecology of acanthocephalans and their transmission. Moreover, this work demonstrates the need for an increasing realism of behavioural observations to explain the phenotypic alterations in details. Finally, this thesis highlights future prospects about the usefulness of manipulative parasites in ecosystems, both in terms of functional and bioindication characteristic
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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