1,720,968 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
Impacts radiatifs des aérosols sur la dynamique en couche limite urbaine : application à la campagne CAPITOUL
No full textLa modélisation de l'aérosol se pose actuellement comme un point de passage obligé pour la compréhension du système atmosphérique. Son rôle multiple le place au centre de préoccupations environnementales comme météorologiques. Aujourd'hui, de nombreuses études attestent que de par ses propriétés physico-chimiques, l'aérosol a un impact direct complexe sur le bilan radiatif du fait de ses propriétés diffusantes et absorbantes. Il a été également montré qu'il avait un fort impact indirect lorsqu'on considère sa capacité d'activation en gouttelettes nuageuses. Enfin et selon différents rapports de l'Organisation Mondiale de la Santé, l'aérosol fin et ultra fin (particules fines inhalables) pose un vrai problème de santé publique (cancers, asthmes,...). Cette étude s'inscrit dans ce contexte et a pour principal objectif d'étudier les impacts radiatifs de l'aérosol urbain sur la couche limite. L'un des objectifs est d'étudier et d'évaluer les rétroactions des aérosols sur la dynamique de la couche limite urbaine au travers des interactions entre les particules atmosphériques et le rayonnement. La campagne de mesure CAPITOUL qui eut lieu entre 2004 et 2005 à Toulouse a servi de cadre à cette étude. Un cadastre d'émissions des aérosols et des gaz a tout d'abord été établi. Puis, une modélisation de l'aérosol urbain, principalement émis par des sources anthropiques (trafic routier et industries), a permis l'étude de l'évolution granulométrique et chimique, ainsi que l'analyse de la distribution spatiale des particules, fortement dépendante de la résolution adoptée. Ensuite, un module permettant de prendre en compte les caractéristiques des aérosols (taille, composition, concentration) calculées en chaque point et à chaque pas de temps lors du calcul des flux radiatifs a été développé. Ce module a permis de calculer les flux radiatifs influencés par la nature absorbante ou diffusante des aérosols. Les impacts sur ces flux et sur la température de la couche limite dans le cas réel de la campagne CAPITOUL sont présentés et comparés aux impacts dus à la surface urbaine seule.Nowaday, aerosol modelling is an absolute interest for the understanding of the complex atmospheric system. The role of aerosol particles is considered crucial for air quality, meteorological and climatical purpose. Several studies show that the aerosol physical and chemical behaviours affect the atmospheric radiative budget by scaterring and aborbing the radiative fluxes. Moreover, it has also been shown that the physical and chemical description of the aerosol is necessary to give shape to water droplets. Finally, several reports from the World Health Organisation show that the fine aerosol particles can cause major diseases as cancer or pulmonary diseases, and should be now considered as a public health matter. This study takes place in this context, and aims at estimating the radiative feedbacks of urban aerosol on the boundary layer. The CAPITOUL field experiment, which took place in the city of Toulouse during one year from march 2004 to february 2005, is the framework of a modelling study during a 2-day IOP. First, an emission inventory has been set up to reproduce the gaz and particles emissions. Then, a simulation exercise aims at reproduce the aerosol evolution at the fine scale of 500 m, and the very specific spatial distribution at different resolutions. In order to estimate the impact of aerosol particles on radiation, a radiative module has been developped to compute online the aerosol optical properties depending on the complex aerosol physical and chemical parameters. The radiative fluxes are then impacted by the aerosol scaterring and aborbing behaviour, leading to change in the urban dynamics. Those feedbacks on radiative fluxes lead to a change of the boundary layer's temperature. The impacts are also compared to the urban surface impacts
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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