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
Téphro et cryptotephrostratigraphie des séquences marines d'eau profonde : quels enseignements peut-on tirer du volcan de la Montagne Pelée et de l'éruption du Young Toba Tuff ?
No full textLa compréhension de l'histoire volcanique passée en termes de fréquence, de chronologie, d'évolution magmatique et de dynamique éruptive est un point fondamental et crucial pour l'évaluation des dangers et des risques volcaniques sur la société et le climat. Les séquences terrestres sont souvent incomplètes en raison des lacunes sédimentaires dues à l'érosion et/ou à l'enfouissement des dépôts à la suite d'éruptions successives et d'événements destructeurs récurrents (c'est-à-dire les effondrements de flancs de volcans). Cependant les dépôts marins peuvent être des archives très utiles pour contraindre plus précisément la chronologie et les caractéristiques des éruptions manquées car ils préservent mieux les produits volcaniques dans le temps. Dans cette thèse, nous avons présenté deux études téphrostratigraphiques marines dans le but de reconstruire l'histoire volcanique et magmatique de l'activité de la Montagne Pelée au cours des 130 derniers ka (Martinique, arc des Petites Antilles) et d'étudier dans le temps la super-éruption du Youngest Toba Tuff qui s'est produite il y a environ 74 ka dans l'île de Sumatra (Indonésie). À cet égard, nous avons étudié les fragments de verre vierge de produits volcaniques préservés dans deux enregistrements sédimentaires marins distincts (U1397A et BAR94-25). En utilisant une approche d'investigation multidisciplinaire combinant des observations téphro-chronostratigraphiques (δ18O) et des analyses géochimiques et texturales in-situ des verres volcaniques, nous avons pu identifier plus précisément les phases de construction de la Montagne Pelée pendant sa période active et reconstruire la chronique de la plus jeune éruption du Toba Tuff à très haute résolution temporelle et sur une plus longue période. En particulier, nous revisitons la chronologie de la Montagne Pelée en étendant la durée de l'activité de la Paléo Pelée de ~50 ka à > 130 ka (probablement jusqu'à 190 ka) et l'étape intermédiaire (étape de la Grande Rivière) de 20 à ~50 ka. Pour la première fois, nous identifions de nombreux produits de l'activité de la Paléo-Pelée (50-130 ka) qui montrent des compositions de magma felsique plus évoluées que les stades plus jeunes. De plus, nous enregistrons plusieurs coulées pyroclastiques provenant du sud de la Dominique, dont l'activité se concentre sur quatre périodes principales couvrant la séquence de Roseau Tuff (37-41 ka), l'ignimbrite de Layou (~65 ka) et l'effondrement du flanc du complexe volcanique Plat Pays. Nous suggérons que cet événement destructeur a pu se produire à plusieurs reprises entre 87-98 ka. En ce qui concerne l'éruption du Youngest Toba Tuff, nous proposons un nouveau scénario éruptif, suggérant qu'il ne s'agit pas d'une éruption cataclysmique unique de courte durée à ~ 74-75 ka, mais plutôt d'une série durable de plusieurs épisodes volcaniques. Sur la base d'analyses texturales et de rapports spécifiques d'éléments traces (par exemple U-Th, Hf-Ta, Ba-Y), nous montrons que cette activité volcanique est en fait composée de multiples éruptions pliniennes divisées en trois périodes d'activité principales : l'activité pré-YTT (VAP1, 101 à ~79 ka), l'activité paroxystique YTT durable (VAP2, ~75-65 ka) et l'activité résurgente Post-YTT (VAP3, ~63 à au moins 49 ka). En conséquence, nous fournissons de nouvelles hypothèses de travail pour mieux reconstruire les séquences éruptives du YTT, en termes de chronologie, de durée et de magnitude, ainsi que pour évaluer son impact potentiel sur le climat et l'environnement à l'échelle mondiale.Understanding past volcanic history in terms of frequency, chronology, magmatic evolution and eruptive dynamics is a fundamental and crucial point for volcanic hazard and risk assessments on society and climate. On-land sequences are often incomplete because of the sedimentary gaps due to the erosion and/or burial of deposits following later eruptions and recurrent destructive events (i.e. volcano flank-collapse events). Variable and inter-related factors such as eruption size, magma production rate, magma composition, eruptive style, and age, nature and thickness of deposits may contribute to the low preservation potential of volcanic deposit, promoting under-recording of past activity. In contrast, large-scale events are more likely to be documented by geological archives over time because of the emission of large amounts of ash (tephra) that are easily transported distally before being deposited as tephra fallouts in the underlying landscape. In this sense, marine deposits can be a very useful archive for constraining more precisely the chronology and the characteristics of missed eruptions because they better preserve volcanic products over time. In this thesis, we presented two marine tephrostratigraphic studies with the aim of reconstructing the volcanic and magmatic history of Montagne Pelée activity during the last 130 ka (Martinique, Lesser Antilles arc) and investigating over time the super-eruption of Youngest Toba Tuff that occurred about 74 ka ago in the island of Sumatra (Indonesia). In this regard, we studied the pristine glass fragments of volcanic products preserved in two separate marine sedimentary records (U1397A and BAR94-25). Using a multidisciplinary investigative approach combining tephro-chronostratigraphic observations (δ18O) and in-situ geochemical and textural analysis of the volcanic glasses, we were able to more accurately identify the construction phases of Montagne Pelée during its active period and to reconstruct the chronicle of the Youngest Toba Tuff eruption at very high temporal resolution and over a longer time span. In particular, we revisit the chronology of Mt. Pelée by extending the duration of the Old-Pelée activity from ~50 ka to > 130 ka (likely up 190 ka) and the intermediate stage (Grand Rivière stage) from 20 to ~50 ka. For the first time, we identify numerous products of Paleo Pelée activity (50-130 ka) that show more evolved felsic magma compositions than the younger stages. Additionally, we record several pyroclastic flows originated from South Dominica, whose activity concentrate over four main periods covering the Roseau Tuff sequence (37-41 ka), the Layou ignimbrite (~65 ka) and the flank collapse of Plat Pays Volcanic Complex. We suggest that this destructive event may have occurred at multiple times between 87-98 ka. Regarding the Youngest Toba Tuff eruption, we propose a new eruptive scenario, suggesting not a single short-lived cataclysmic eruption at ~ 74-75 ka, but rather an enduring series of several volcanic episodes. On the basis of textural analysis and specific trace element ratios (e.g. U-Th, Hf-Ta, Ba-Y), we show that this volcanic activity is actually composed of multiple Plinian eruptions divided in three main activity periods: the Pre-YTT activity (VAP1, 101 to ~79 ka), the paroxysmal YTT activity lasting (VAP2, ~75-65 ka) and the Post-YTT resurgent activity (VAP3, ~63 to at least 49 ka). Accordingly, we provide new working hypothesis to better reconstruct the YTT eruptive sequences, in terms of chronology, duration and magnitude, as well as to assess its potential climate and environmental impact on a global scale
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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