1,721,006 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
Theoretical and experimental investigation of electronic transport phenomena in oxide based resistive switches
No full textIn this work the conduction mechanism of resistive switching devices is investigated, which could be used as novel data storage memory or for the realization of neuromorphic computing architectures. Those memory cells consist of an insulating oxide between two metal contact electrodes. Under an externally applied electric field the migration of oxygen vacancies is initiated. This reconfiguration induces a non-volatile change in the electrical resistance, which is the central state variable. For a better physical understanding, the investigation of the internal conduction mechanism is of fundamental meaning. In several studies, the conduction mechanism is not the main focus. As a result, several conduction mechanism are suggested for comparable current-voltage (I-V) characteristics.A privilege of this work is the opportunity to investigate the current transport experimentally and also apply different simulation methods. Two representative resistive switching cells based on SrTiO3 and HfO2 are considered, which significantly distinguish in their I-V curve. Measurements and simulations of the SrTiO3 based cell show a transport over the conduction band. The simulation in the case of HfO2 show a transport over the defect states. Independent of this difference, the resistive switching mechanism in both cases could be unified to a huge extend. Additionally, a volatile threshold switching based on a pure electronic nature is explored.At the beginning of this work, electrical measurements on the SrTiO3 based cell are applied at different temperatures. A typical method to find the conduction mechanism is the fitting of analytical equations to the I-V curve. Even though the fitting of the Schottky emission equation leads to positive impressions, a detailed review reveal physical contradictions. The same contradictions generally occur for thermal activated current transport equations. For this reason an atomic quantum mechanical approach is used by means of density functional theory combined with the non-equilibrium Greens function formalism (DFT + NEGF). These ab initio simulations reveal a band transport, which is limited by a tunnelling process through the Schottky barrier at the metal electrode. This simulation method reproduce parts of the measurements. In an additional investigation the simulations are applied, to analyse the Schottky barrier lowering effect. The problem of this method is the huge requirement of computational resources, which limits the flexibility. Consequently, not all measurements could be reproduced with DFT + NEGF. Therefore, a continuum single band transport model is developed on the basis of the DFT + NEGF results. This model could predict correctly all trends of the temperature dependent I-V curves. Based on this, a compact model compatible simplification is developed for the detected current transport. This allows a generalized description of the current in the compact model and replaces the previous preselected conduction mechanism. The descriptions so far reference to the SrTiO3 based resistive cell with a strong exponential I-V dependence. Other resistive switching systems distinguishes because of a less strong I-V dependence. For such an example a HfO2 based resistive switching cell is investigated using DFT + NEGF. Here, the current transport is mainly transmitted over defect states and limited by the defect to electrode tunnelling. In both cases, the tunnelling connection to the electrode is the limiting mechanism. This observation allows to generalize the resistive switching mechanism in HfO2 and SrTiO3. In both cases the resistance change is induced by an increasing and decreasing tunnelling distance to the electrode. Besides the ionic non-volatile resistive switching a further effect of volatile resistive switching is investigated. This effect is purely electronic and based on a thermal instability, which leads to a high number of thermal activated charge carriers. This thermal instability occurs at a certain threshold voltage, which can be predicted in continuum model. Out of it, empirical equation are derived for the dependence on material constants and cell geometry. The same thermal instability could be found in the compact model at comparable voltages. Hence, this volatile switching could have a high relevance for the dynamic of the resistive switching
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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