1,720,957 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
Investigation of the structure-property-relation of electrodes for lithium-ion batteries depending on the current collector, the binder as well as the compression and the evaluation of an ionic liquid as electrolyte
No full textEine große Herausforderung des 21. Jahrhunderts stellt die Bereitstellung von Energie unter gleichzeitiger Reduzierung der globalen Schadstoffemissionen dar. Zur Realisierung dieses Ziels sind effiziente, kostengünstige sowie umweltfreundliche Energiespeichersysteme notwendig. Lithium-Ionen-Batterien sind hierbei aussichtsreiche Kandidaten für derartige Speichersysteme.
Neben der elektrochemisch aktiven Komponente wird das elektrochemische Verhalten von Lithium-Ionen-Batterie-Elektroden durch elektrochemisch inaktive Materialien sowie durch die Elektrodenarchitektur beeinflusst. Die vorliegende Arbeit beschäftigt sich hierbei mit der Struktur-Eigenschafts-Beziehung von Lithium-Ionen-Batterie-Elektroden.
Als Anodenmaterial dient das sichere sowie hochleistungsfähige Li4Ti5O12 und als Kathodenmaterial fungiert das sichere, umweltfreundliche und kostengünstige LiFePO4. Ein guter elektrischer Kontakt zwischen der Aktivmasse und dem Stromabnehmer ist notwendig, um einen schnellen Elektronentransfer zwischen diesen beiden Komponenten zu realisieren. Um diesen Transfer zu beeinflussen, wurde die Oberfläche von den metallischen Stromabnehmern chemisch modifiziert. Mit chemischen, elektrochemischen sowie strukturaufklärenden Analysemethoden werden die Wechselwirkungen zwischen dem Stromabnehmer und der Aktivmasse als Funktion des Stromabnehmers und des Bindersystems diskutiert. Ferner wurde die Mikrostruktur von Elektroden mittels Verdichtung gezielt modifiziert. Anhand von elektrochemischen Messungen werden Schlussfolgerungen über die ionische und elektrische Leitfähigkeit in Abhängigkeit des Verdichtungsgrades gewonnen. Darüber hinaus wird der Einfluss der Primärpartikelgröße des LiFePO4 auf die Elektrodenmikrostruktur sowie auf das elektrochemische Verhalten diskutiert.
Ein weiterer Aspekt der vorliegenden Arbeit stellt die Erhöhung der Sicherheit von Lithium-Ionen-Batterien dar. Üblicherweise werden in Lithium-Ionen-Batterien Elektrolyte auf der Basis organischer Carbonate eingesetzt. Solche Carbonate sind leicht entflammbar und weisen somit ein erhebliches Gefahrenpotential auf. Um diese Gefahrenquelle zu vermeiden wird die Funktionalität der schwer entflammbaren, ionischen Flüssigkeit N-Methoxyethyl-N-methylmorpholinium Bis[(trifluoromethyl)sulfonyl]imid als Elektrolyt in Lithium-Ionen-Batterien bewertet.To ensure the energy demand and to reduce simultaneously the global pollution is one of the most important challenges within the 21st century. Low-cost, efficient as well as environmentally friendly energy storage media are essential to meet these requirements. Among these lithium-ion batteries represent one of the most promising candidates.
The electrochemistry of electrodes for lithium-ion batteries is influenced by the electrochemically active material, electrochemically inactive materials as well as by the electrode architecture. This work concerns with the structure-property relation of lithium-ion battery electrodes.
The safe and the high-power capable Li4Ti5O12 serves as anode material and the safe, environmentally-friendly and low-cost LiFePO4 acts as cathode material. A good electrical con-tact between the active mass and the current collector is crucial to realize a fast electron transfer between these two components. To influence this transfer the surface of the metallic current collectors was chemically modified. Depending on the different current collectors and on the binder system the interactions between the current collector and the active mass using chemical, electrochemical as well as optical analytical methods are investigated. Furthermore, the structure of the electrodes was intentionally modified by compressing. With the help of electrochemical measurements the ionic and the electrical conductivity of such electrodes as a function of the compression is discussed. In addition the impact of the primary particle size of LiFePO4 on the structure and on the electrochemistry is shown.
Besides these investigations safety concerns of lithium-ion batteries are pointed out. Usually the electrolytes for lithium-ion batteries are based on organic carbonates. However, such electrolytes are easily flammable resulting in a significant hazard potential. To eliminate that source of danger the functionality of the flame resistant ionic liquid N-Methoxyethyl-N-methylmorpholinium bis[(trifluoromethyl)sulfonyl]imide is evaluated as an alternative electrolyte for lithium ion batteries
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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