1,720,969 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
Vibrational properties of epitaxial silicene on Ag(111)
No full textThis dissertation works out the vibrational properties of epitaxial silicene, which was discovered by Vogt et al. in 2012 by the epitaxial synthesis on the silver substrate. Its two-dimensional (2D) character is modified in comparison to the free-standing silicene due to its epitaxial nature, since the underlying substrate alters the physical properties of silicene as a result of the strong hybridization of the electronic levels of the substrate and adlayer. The growth of silicene layers is complicated by the sensitivity of the Si structures to the experimental conditions, mainly temperature, resulting in the formation of several seemingly different surface reconstructions. Another Si structure appears on the Ag surface at a supramonolayer coverage. The Raman spectroscopy was utilized to understand the relation between different Si structures and reveal their origin as well as to investigate the phonon-related physical properties of two-dimensional Si sheets.
The central core of this work is the growth and characterization of these 2D silicene monolayers on the Ag (111) surface as well as the formation of silicene multilayer structures. The characterization of these materials was performed using in situ surface-sensitive measurement methods such as Raman spectroscopy and low-energy electron diffraction under ultra-high vacuum conditions due to high chemical reactivity of epitaxial silicene. Additional characterization was done ex situ by means of scanning force microscopy. The experimentally determined spectral signature of the prototypical epitaxial (3x3)/(4x4) silicene structure was confirmed by ab initio calculations, in collaboration with theory groups. The Raman signatures of the other 2D and 3D Si phases on Ag (111) were determined which allowed us to provide a clear picture of their formation depending on the preparation conditions.
The monitoring of the silicene multi-layer growth yielded the vibrational signature of the top layer, reconstructed in a (√3x√3) fashion. It was compared to the inverse, (√3x√3)-Ag/Si(111), system showing the vast amount of similarities, which suggest that the (√3x√3) reconstruction belong to the silver layer. The chemical and physical properties of this surface structure additionally strengthen this equivalence.
The possibility of functionalization of epitaxial silicene was demonstrated via exposure to the atomic hydrogen under UHV conditions. The adsorbed hydrogen covalently bonds to the silicene lattice modifying it and reducing its symmetry. As shown by Raman spectroscopy, such modification can be reversed by thermal desorption of hydrogen. The excitation-dependent Raman measurements also suggest the change of the electronic properties of epitaxial silicene upon hydrogenation suggesting that its originally semi-metallic character is modified into a semiconducting one.Die experimentellen Forschungsarbeiten zum Thema Silicen basieren auf den 2012 von Vogt et al. durchgeführten Untersuchungen zu dessen Synthese auf Silbersubstraten. Diese Untersuchungen lieferten die Grundlage, auf der zweidimensionales (2D) epitaktisches Silicen sowie weitere 2D Materialien untersucht werden konnten. In den anfänglichen Arbeiten konnte dabei gezeigt werden, dass sich die Eigenschaften von epitaktischem Silicen gegenüber den theoretischen Vorhersagen von frei-stehendem Silicen unterscheiden. Darüber hinaus verkomplizieren sich die experimentellen Untersuchungen dieses 2D Materials, da auf dem Ag(111) Wachstumssubstrat sechs verschiedene 2D Si Polytypen existieren. Eine detaillierte Darstellung dieser Untersuchungen findet sich in dem einführenden Kapitel der vorliegen Promotionsschrift. Der zentrale Kern dieser Arbeit beschäftigt sich mit dem Wachstum und der Charakterisierung dieser 2D Silicen Monolagen auf Ag(111) Oberflächen sowie der Bildung von Silicen- Multilagen Strukturen. Die Charakterisierung dieser Materialien wurde in situ mit oberflächenempfindlichen Messmethoden wie der Raman Spektroskopie und der niederenergetischen Elektronenbeugung unter Ultrahochvakuum-Bedingungen durchgeführt. Eine zusätzliche Charakterisierung erfolgte ex situ mittels Raster-KraftMikroskopie. Die experimentell bestimmte spektrale Raman-Signatur der prototypischen epitaktischen (3x3)/(4x4) Silicene Struktur wurde durch ab initio Rechnungen, in Zusammenarbeit mit Theoriegruppen, bestätigt. Durch diesen Vergleich wir die zweidimensionale Natur der epitaktischen Silicen-Schichten vollständig bestätigt, wodurch andere mögliche Interpretationen ausgeschlossen werden können. Darüber hinaus wurden die Ramans-Signaturen der weiteren 2D und 3D Siliziumphasen auf Ag(111) bestimmt, wodurch sich ein klares Bild der Bildung dieser Strukturen in Abhängigkeit von den Präparationsbedingungen ergibt. Um die Möglichkeit der Funktionalisierung von Silicen und der weiteren 2D Si Strukturen zu testen, wurden diese unter UHV Bedingungen atomarem Wasserstoff ausgesetzt. Durch die Bindung zu den Wasserstoffamen wird die kristalline Struktur der Silicen-Schichten modifiziert und die Symmetrie reduziert, was sich deutlich in der spektralen Raman-Signatur zeigt. Wie mittels Raman Spektroskopie gezeigt werden konnte, kann diese Modifikation durch thermische Desorption des Wasserstoffs rückgängig gemacht werden, ist also reversibel. Raman Messungen mit verschiedenen Anregungswellenlängen deuten darüber hinaus auf die Änderung der elektronischen Eigenschaften der Silicen-Schichten durch die Hydrierung hin. Der ursprüngliche halbmetallische Charakter der epitaktischen Silicen-Schicht geht möglicherweise in einen halbleitenden Zustand über. Das Wachstum von Silicen Multilagen wurde ebenfalls mit in situ Ramanspektroskopie verfolgt. Die sich dabei ergebene Raman-Signatur wurde mit der Raman-Signatur von Ag terminiertem Si(111) verglichen. Hier zeigen sich große Ähnlichkeiten, die auf eine ähnliche atomare Struktur hindeuten und zeigen, dass Ag Atome für die Ausbildung der Oberflächenstruktur während des Wachstums der Si-Lagen verantwortlich sind. Die chemischen und physikalischen Eigenschaften dieser Struktur bestärken zusätzlich diese Äquivalenz
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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