1,720,958 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
A novel approach for generating digital chirp signals using FPGA technology for synthetic aperture radar applications
No full textIn this dissertation a novel digital chirp signal generator is proposed, analyzed, and realized. The new system generates digital chirp signals with the lowest level of spurious harmonic distortion, less memory size and low hardware complexity in comparison with other systems and techniques reported in the literature.
In this improved digital chirp generator the start frequency and phase can be controlled by the initial content of the counter and the accumulator. Furthermore, the sweep rate can also be controlled by means of location and size of the address lines. The proposed system is a hybrid of the digital chirp generator and the system using the methodology of the piecewise polynomial interpolation based on the direct digital frequency synthesizer. Moreover, an optimization technique is applied to enhance the performance of this chirp generator and to avoid the attenuation in the speed of its operations.
The new digital chirp generator uses a clock to trigger the counter (first integrator) and after that its output feeds the accumulator (second integrator), the decimal value of selected digital lines of the content of the accumulator, which represents the phase, is then used to calculate the value of the chirp sine using the interpolator. This interpolator uses predetermined interpolation coefficients to fit the sine wave from the calculated phase instead of using a predetermined waveform stored in a big size memory. This implies, that a smaller look-up table for sine and cosine functions is used in comparison with the previous techniques.
A new improved parallel processing technique is proposed in order to increase the bandwidth of the chirp signal up to 320 MHz and more based on the used level of the parallelism.
As a comparison with the look-up table method, the size of the ROM in the new method is reduced by a factor of more than 128 when using 12 address lines, and Spurious Free Dynamic Range (SFDR) reaching 100.9 dBc.
The system is realized using the Innovation Integration X5-TX platform with FPGA Xilinx VIRTEX-5 used with the parallel processing technique to generate a chirp signal with high bandwidth up to 320MHz using 200 MHz clock frequency.In dieser Dissertation wird ein neuartiger Chirp-Signal-Generator vorgeschlagen, analysiert und realisiert. Das neue System erzeugt digitale Chirp-Signale mit im Vergleich zu den aus der Literatur bekannten Systemen und Techniken geringsten harmonischen Verzerrungen, reduziertem Speicherbedarf und niedrigerem Hardware-Aufwand.
Bei diesem verbesserten digitalen Chirp-Signal-Generator kann die Startfrequenz und Phase durch den initialen Inhalt des Zählers und des Akkumulators gesteuert werden. Darüber hinaus kann auch die Steigung der Frequenzrampe durch die Anzahl und die Beschaltung der Adressleitungen gesteuert werden. Das vorgeschlagene System ist ein Hybrid aus einem digitalen Chirp-Generator und einem System, das auf einem direkten digitalen Frequenzsynthesizer basiert und die Methode der stückweisen polynomialen Interpolation verwendet. Des Weiteren wird eine Optimierungstechnik angewandt, um die Leistung des Chirp-Generators zu verbessern und eine Verlangsamung der Rechengeschwindigkeit zu vermeiden.
Der neue digitale Chirp-Generator verwendet einen, um einen Taktgenerator Zähler (ersten Integrator) zu takten, dessen Ausgang den Akkumulator (zweiten Integrator) speist. Der Dezimalwert ausgewählter digitaler Leitungen des Akkumulatorinhalts, welcher die Phase repräsentiert, wird dann verwendet, um den Wert des Chirp-Signals mittels des Interpolators zu berechnen. Dieser Interpolator verwendet im Voraus berechnete Interpolationskoeffizienten, um die Sinusfunktion aus der berechneten Phase zu erzeugen, anstatt eine vorgegebene, in einem großen Speicher abgelegte Wellenform zu verwenden. Dies hat zur Folge, dass im Vergleich zu den bisherigen Verfahren eine kleinere Look-Up-Tabelle für die Sinus- und Kosinusfunktionen verwendet wird.
Eine neue, verbesserte parallele Verarbeitungstechnik wird vorgeschlagen, um die Bandbreite des Chirp-Signals auf bis zu 320 MHz und mehr (je nach Grad der Parallelisierung) zu vergrößern.
Im Vergleich zur Methode mit Look-Up-Tabellen wird die Größe des Speichers durch die neue Methode um einen Faktor von mehr als 128 bei Verwendung von 12 Adressleitungen reduziert, und der störungsfreie dynamische Bereich (Spurious Free Dynamic Range, SFDR) erreicht einen Wert von 100,9 dBc.
Das System wurde realisiert auf der Plattform "Innovation Integration X5-TX" mit einem Xilinx VIRTEX-5 FPGA. Verwendet wurde die parallele Verarbeitungstechnik, um mit einer Taktfrequenz von 200 MHz ein breitbandiges Chirp-Signal mit einer Bandbreite von bis zu 320 MHz zu erzeugen
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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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