1,720,982 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
Mehrdimensionale photothermische Defektrekonstruktion in anisotropen Medien
Get PDFUm höhere Nutzlasten, größere Reichweiten und einen geringeren Treibstoffverbrauch zu erzielen, ist die Luftfahrtindustrie bestrebt, das Gewicht von Flugzeugstrukturen zu reduzieren. Dieses Bestreben hat die Entwicklung von künstlichen Verbundstrukturen vorangetrieben, und heutzutage bestehen moderne Flugzeugstrukturen bereits zu 50 Prozent aus faserverstärkten Kunststoffen. Faserverstärkte Kunststoffe sind sehr anfällig für Schlagschäden, da diese die mechanischen Eigenschaften der Verbundstruktur erheblich beeinträchtigen. Schlagschäden können sicherheitskritische Defekte wie Delaminationen in der Verbundstruktur verursachen. Um sicherheitskritische Defekte zu detektieren, sind hochentwickelte zerstörungsfreie Prüfmethoden, wie beispielsweise die aktive Thermografie, notwendig. Zur wirtschaftlichen Bauteilprüfung benötigt die Industrie zuverlässige und schnelle zerstörungsfreie Prüfmethoden. Grundsätzlich können diese Anforderungen durch die Prüfung mittels aktiver Thermografie erfüllt werden, die zudem eine berührungslose zerstörungsfreie Prüfmethode darstellt. Ein Nachteil dieser Prüfmethode ist jedoch die deutliche Abnahme der örtlichen Auflösung mit zunehmender Abbildungstiefe, wodurch unscharfe Defektabbildungen entstehen. Zudem erlauben die existenten Rekonstruktionsverfahren der aktiven Thermografie, insbesondere bei anisotropen Materialien und unter der Berücksichtigung des lateralen Wärmeflusses, keine 3D Defektvisualisierung. In dieser Arbeit wird ein neuer Ansatz zur aktiven Thermografie-Datenauswertung, das sogenannte virtuelle Wellenkonzept, für die Anwendung auf anisotrope Materialien und für photothermische Temperatursignale erweitert. Darüber hinaus wird die Abnahme der räumlichen Auflösung mit zunehmender Abbildungstiefe durch die Einbindung von Vorinformationen in das Regularisierungsverfahren, wie zum Beispiel Positivität und Sparsity (bezeichnet dünnbesetzte Matrizen), teilweise kompensiert. Zudem wird ein neuartiger Ansatz für die Bestimmung des anisotropen thermischen Diffusivitäts-Tensors vorgeschlagen, und ein mathematischer Zusammenhang dieses Tensors mit dem Tensor der virtuellen Schallgeschwindigkeiten hergeleitet. Mithilfe dieses Zusammenhanges kann der anisotrope Wärmefluss entzerrt werden, wodurch eine 3D Defektvisualisierung und Defektrekonstruktion in faserverstärkten Kunststoffen ermöglicht wird. Das vorgeschlagene 3D Rekonstruktionsverfahren wird auf kohlenstofffaserverstärkte Materialien mit künstlichen Defekten, abgebildet durch Flachbodenbohrungen, und auf reale Defekte, abgebildet durch Delaminationen, angewendet. Zusammenfassend stellt diese Dissertation ein schnelles, leicht interpretierbares 3D Rekonstruktionswerkzeug zur photothermischen Defekterkennung in anisotrope Materialien vor.To enable higher payloads, longer ranges and lower fuel consumption, the aviation industry is striving to reduce the weight of aircraft structures. This ambition has boosted the development of man-made composite structures, and today modern aircraft structures already consist of 50 percent fiber-reinforced polymers. Fiber-reinforced polymers are highly susceptible to impact damage, which significantly affects the mechanical properties of the composite structure. Impact damage can cause safety-critical subsurface defects such as delaminations in the composite structure. Advanced non-destructive testing methods such as active thermography are necessary to reveal safety critical defects. The industry requires reliable and fast non-destructive testing methods for economical part inspection. In principle, these requirements can be met by active thermography testing, which is also a contactless non-destructive testing method. However, a drawback of this method is the significant decrease in spatial resolution with increasing imaging depth, which results in blurred images. In addition, current active infrared thermography methods are lacking in 3D representation of subsurface defects or do not account for lateral heat flow. In this thesis, a new approach for active thermography data evaluation, called the virtual wave concept, is extended for application to anisotropic materials and for photothermal temperature signals. Moreover, the degradation of spatial resolution with increasing imaging depth is partially compensated by incorporating prior information such as positivity and sparsity into the regularization procedure. In addition, a novel approach for the estimation of the anisotropic thermal diffusivity tensor is proposed, which enables the rectification of the anisotropic heat flux and a 3D visualization of subsurface defects in fiber-reinforced samples. The proposed 3D reconstruction method is applied to carbon fiber reinforced materials with artificial defects, represented by flat bottom holes, and to real defects, represented by delaminations. To summarize, this doctoral thesis presents a fast, easily interpretable 3D reconstruction tool for photothermal subsurface defect detection in anisotropic media
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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