1,720,953 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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Ceria based cathodes for CO 2 electrolysis in solid oxide cells
Get PDFAls alternative Treibstoffgewinnung für "Solid Oxide Fuel Cells" (SOFC) sowie zur Gewinnung von Gasen für chemische Reaktionen werden bereits "Solid Oxide Electrolyse Cells" (SOEC) eingesetzt. Diese haben den großen Vorteil kein weiteres CO2 zu produzieren, wie dies bei der Vergasung von Kohlenstoff unter einer Wasserdampfatmosphäre der Fall ist. Die Reduktion von CO2 geht jedoch mit der Möglichkeit einer Ablagerung von Kohlenstoff an den Elektroden einher. Das Ziel der Arbeit ist es die Nutzbarkeit von gemischt ionisch/elektronisch leitenden Cer0.9Gd0.1O1.95-Kathoden (GDC) auf YSZ-Elektrolyten mit LSCF-Anoden für kontinuierliche CO2-Elektrolyse zu testen. Weiters soll der Einfluss von Nickelpartikeln in den GDC-Kathoden sowie der Zusammenhang zwischen der inneren Oberfläche der porösen Elektroden und der Dünnschichtelektroden bestimmt werden. Die porösen Elektroden wurden auf polykristallinem YSZ-Substrat mit LSCF-Anoden mittels Siebdruckverfahren hergestellt und über Platinpartikel kontaktiert. Für die Dünnfilmelektroden wurde ein Einkristall-YSZ (100) als Substrat verwendet, die Arbeitselektrode mittels "Pulsed Laser Deposition" (PLD) aufgetragen und die Gegenelektrode über Siebdruck appliziert und gesintert. Über eine impedanzspektroskopische Charakterisierung der Dünnschichtelektroden stellte sich ein erheblich verringerter Polarisationswiderstand aufgrund einer Beschichtung mittels Nickelpartikeln auf der Oberfläche heraus. Dieser wurde später auch bei porösen Elektroden beobachtet. Durch Einzelmessungen der jeweiligen Elektrolysezellen wurde die Funktionalität der GDC- sowie Ni/GDC-Kathoden getestet und ein Leistungsvergleich der einzelnen Zellen durchgeführt. An der reinen GDC-Kathode mit einer Schichtdicke von 6,9m, wurde eine maximale Stromdichte von 1,5mA/cm2 bei 2V gemessen. Durch eine Dotierung von 10% Nickel und einer Schichtdicke von 4,8m konnte die Stromdichte auf 3,7mA/cm2 gesteigert werden, wodurch sich mehr als eine Verdoppelung ergab. Der Kohlenstoffmonoxid Produktionsstrom verhielt sich dabei dem elektrischen Strom entsprechend. Undotierte GDC-Kathoden lieferten einen CO-Volumenstrom von 0,32cm3/min während die 10% Nickel dotierten 0,65 cm3/min ergaben. Der Vergleich zwischen Dünnfilm und porösen Elektroden ergab einen deutlichen Unterschied der Stromdichten. Bei reinem GDC Dünnfilm konnten sehr hohe Ströme von 283 mA/cm2 gemessen werden. Gründe hierfür könnten in Degradationen der porösen Elektrode durch Verunreinigung liegen.Solid oxide electrolysis cells are used for the creation of fuels for solid oxide fuel cells (SOFC) as well as gases for chemical reactions. The big advantage of the fuel production through fuel cells is the CO2 neutrality during the creation instead of the use of coal gasification with steam. A main problem we face here is the deposition of carbon on the electrodes, which has to be prevented to maintain the usability of the cell. The goal of this work is to test the usability of mixed ionic/electronic conducting Ce0.9Gd0.1O1.95 cathodes (GDC) on YSZ-electrolyte with LSCF-anodes for CO2 electrolysis. Furthermore, the influence of nickel particles in GDC cathodes was tested and the performance of porous electrodes and thin film electrodes were compared. Porous electrodes have been screen printed on polycrystalline YSZ substrates with LSCF as counter electrodes and platinum particles as connecting elements. The thin film electrodes are on yttrium stabilized zirconia single crystal (100) electrolytes. The GDC electrodes are applied by pulsed laser deposition (PLD) and the counter electrodes (LSCF) are screen-printed and sintered. By impedance spectroscopy, the polarisation resistances of all samples could be obtained. The introduction of nickel reduced the polarisation resistances for all samples. The functionality of the cells was tested by applying direct voltage on the cells. The performances of the cells were compared through the amount of gas produced as well as by the current applied during the measurement. For pure porous GDC-cathodes with a film thickness of 6,9m at a voltage of 2V, a maximum current density of 1,5mA/cm2 was obtained. The nickel doping of 10% increased the current density of the GDC layer (film thickness: 4,8m) at the same conditions to 3,75mA/cm2. The CO flow corresponds to the current density. In the process pure GDC produced 0,32 cm3/min of CO per minute while doped GDC generated 0,65 cm3/min. Both had a Faraday efficiency of about 87% during the measurement. The cells with thin film electrodes showed much better performance with current densities up to 283mA/cm2. Reasons for their better performance are possibly poisoning effects due to impurities in the porous electrodes
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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