1,720,962 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
Ceramic coated fuel claddings for lead-cooled fast reactors
No full textLAUREA MAGISTRALETra i diversi prototipi presenti in Generation IV, il reattore veloce raffreddato a Piombo si pone come il più promettente. La scelta del Piombo come termovettore potrebbe risolvere tutti i problemi associati all’uso di altri metalli come l’instabilità chimica o l’attivazione sotto irraggiamento. Tuttavia, l’utilizzo del piombo ad oggi non è stato possibile per la sua aggressività nei confronti degli acciai strutturali dai 500 °C. Sopra questa temperatura, raggiunta all’interno del core, i materiali strutturali non sono in grado di resistere alla corrosione ed erosione.
Per permettere l’impiego del piombo liquido è necessario proteggere le superfici con cui il piombo entra in contatto. Pertanto, uno dei possibili rimedi consiste nel trattare superficialmente i materiali interessati. In tal senso, il processo di alluminazione insieme al controllo dell’ossigeno nel termovettore porta alla formazione di un efficace strato di allumina. Allo stesso tempo questo tipo di film presenta alcuni svantaggi quali la scarsa resistenza al fretting e alla rottura per fatica, nonché la creazione di specie secondarie sotto irraggiamento.
Un’interessante alternativa consiste nel ricoprire l’acciaio con rivestimenti ceramici. Per ottenere un rivestimento efficace, il film deve essere il più denso e compatto possibile, ben adeso, compatibile con il substrato e resistente ai fenomeni sopracitati. La deposizione laser-impulsato (PLD) oltre a produrre film di questo tipo presenta il vantaggio di poter essere condotta a basse temperature e su qualsiasi tipo di substrato. Diversi studi hanno dimostrato l’efficacia dell’allumina per PLD nella protezione degli acciai in contatto con piombo fluente. Il materiale possiede inoltre notevoli proprietà fisiche conferite da un comportamento intermedio ceramico/metallico. Rimangono comunque alcune perplessità in merito al suo utilizzo dovute principalmente alla mancanza di self-healing oltre che al comportamento sotto creep o ciclaggio termico, soprattutto nel caso di substrati non planari. Ulteriori studi sono richiesti per qualificare questo tipo di materiale, valutando ad esempio l’impiego di un bonding layer metallico.Among 4th Generation Nuclear Reactors, Lead-cooled Fast Reactors represent one of the most promising concepts. Lead stands above all metals because, ideally, it can solve issues associated with other types of coolant, including sodium (strong chemical reactivity) or lead-bismuth eutectic (activation under irradiation). Nevertheless, the bottleneck is lead aggressiveness towards structural steels, especially above 500-550 °C. Over this temperature range, which will be reached by in-core components, traditional materials cannot withstand erosion degradation and corrosion.
To allow the development and construction of this new generation reactors it is necessary to protect structural steels from these phenomena. One possible solution is treating the material to obtain a surface layer able to survive operational conditions. A successful example is the aluminizing surface treatment, together with the controlled injection of oxygen into the coolant. This guarantees the formation of a protective alumina scale. However, the treatment has some drawbacks, such as fretting corrosion, low cycle fatigue and radiation-induced phase instability.
A promising alternative consists in covering metals surface with ceramic coatings. Specific requirements must be achieved: high density and compactness, strong interfacial bonding, wear resistance and mechanical compatibility with steels. For this purpose, Pulsed Laser Deposition appear as the most suitable technique. In addition, it offers different others advantages: it can be carried out at room temperature and on every types of materials. An extensive characterization campaign has shown that PLD-grown Al2O3 is a perfect candidate for protecting steels in HLM environment. Previous works have also demonstrated strong adhesion, combined with a mix of metal- and ceramic-like properties. On the other hand, some of the main issues regarding the use of such coating concern the lack of self-healing properties, creep strength and resistance to thermal cycling, especially in the case of films grown on non-planar surfaces. Thus, further improvements are needed like the possible inclusion of a metallic bonding layer inside the system
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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