1,720,968 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
Study of all-optical wavelength conversion and regeneration subsystems for use in wavelength division multiplexing (WDM) telecommunication networks
No full textIn this thesis, we study all-optical processing techniques based on non-linear semiconductor optical amplifiers for the functionalities of second and third generation optical networks. In particular, devices for all-optical wavelength conversion with regenerative properties have been investigated. The configurations under investigation are based on the non-linear four-wave mixing process which arises when fields with proper spectral and power arrangement are coupled into the active medium. The performance characteristics of the devices are determined by the properties of the optical amplifier as well as by the operating conditions like the gain of the optical amplifier, the power levels and the frequency detuning of the pump and the information signal. In the first part of this thesis, the noise properties of the converted signal generated by the four-wave mixing based wavelength conversion process were investigated. The investigation of the noise characteristics was carried out by a theoretical analysis and the corresponding experimental confirmation, including the separate study of noise induced by the four wave mixing process itself and the amplified spontaneous emission noise from the amplifier. The study of the noise properties at the new wavelength was performed for the intensity as well as the phase noise of the converted signal. The useful conclusions from this study were used for the investigation of the regenerative properties of the mixing process. The second part of this thesis starts with the experimental investigation and the confirmation of the regenerative properties of the four wave mixing process in a semiconductor optical amplifier. The regeneration and simultaneous wavelength conversion of 2.5 Gbps optical signals is experimentally demonstrated. Furthermore, the second part includes the design and optimization by numerical simulation of a wavelength conversion system with regenerative properties, for use in nodes of wavelength division multiplexing optical networks. In this thesis, an alternative configuration for the pump and data signal is proposed for the first time, in order to obtain non-linear response from the optical amplifier. Based on this approach the new signal exhibits improved noise characteristics and lower bit error rate. The numerical investigation showed successful regenerative operation at 40 Gbps.Σε αυτή τη διατριβή μελετούμε νέες τεχνικές αμιγώς οπτικής επεξεργασίας σήματος για οπτικά δίκτυα δεύτερης και τρίτης γενιάς, οι οποίες βασίζονται σε μη γραμμικούς ημιαγωγικούς οπτικούς ενισχυτές. Συγκεκριμένα, διερευνήθηκαν διατάξεις οι οποίες επιτελούν λειτουργίες μετατροπής μήκους κύματος με αναγεννητικά χαρακτηριστικά. Οι διατάξεις εκμεταλλεύονται το μη γραμμικό φαινόμενο της μίξης τεσσάρων κυμάτων που εγείρεται εφόσον κύματα κατάλληλης ισχύος και φασματικής απόστασης εισαχθούν σε ενεργό μέσο. Οι επιδόσεις και οι ιδιότητες των διατάξεων επεξεργασίας σήματος καθορίζονται από τα χαρακτηριστικά των οπτικών ενισχυτών, καθώς και από τις συνθήκες λειτουργίας όπως η απολαβή του οπτικού ενισχυτή, η ισχύς και η φασματική απόσταση των κυμάτων άντλησης και πληροφορίας που χρησιμοποιούνται. Στο πρώτο μέρος της εργασίας αυτής παρέχεται μια θεωρητική ανάλυση και η πειραματική επιβεβαίωση των ιδιοτήτων θορύβου της μετατροπής μήκους κύματος μέσω της διαδικασίας της μίξης τεσσάρων κυμάτων. Μελετώνται ξεχωριστά η επίδραση της διαδικασίας της μίξης τεσσάρων κυμάτων και του θορύβου αυθόρμητης εκπομπής από τον οπτικό ενισχυτή στα χαρακτηριστικά θορύβου του σήματος στο νέο μήκος κύματος, για δύο περιπτώσεις. Η πρώτη περίπτωση αφορά τον θόρυβο πλάτους και η δεύτερη τον θόρυβο φάσης του σήματος στην έξοδο. Από την μελέτη εξάγονται χρήσιμα συμπεράσματα τα οποία χρησιμοποιούνται για την διερεύνηση των αναγεννητικών χαρακτηριστικών της διαδικασίας της μίξης. Στο δεύτερο μέρος της εργασίας αυτής πραγματοποιείται η πειραματική επιβεβαίωση των αναγεννητικών χαρακτηριστικών της διαδικασίας της μείξης τεσσάρων κυμάτων σε οπτικό ημιαγωγικό ενισχυτή. Επιτυγχάνεται πειραματικά η αναγέννηση διαμορφωμένων οπτικών σημάτων ρυθμού 2.5 Gbps με ταυτόχρονη μετατροπή μήκους κύματος. Στην συνέχεια πραγματοποιείται η σχεδίαση και η βελτιστοποίηση μέσω αριθμητικής προσομοίωσης ενός συστήματος μετατροπής μήκους κύματος με ιδιότητες αναγέννησης διαμορφωμένων οπτικών σημάτων, για χρήση σε κόμβους δικτύων πολυπλεξίας μήκους κύματος. Στην εργασία αυτή προτείνεται για πρώτη φορά μια εναλλακτική διάταξη των κυμάτων άντλησης και πληροφορίας για την εκμετάλλευση της μη γραμμικής απόκρισης του οπτικού ενισχυτή και προκειμένου το νέο κύμα να φέρει βελτιωμένα χαρακτηριστικά θορύβου και άρα μικρότερο ρυθμό σφαλμάτων. Η θεωρητική διερεύνηση έδειξε επιτυχή λειτουργία σε ρυθμούς μέχρι 40 Gbps
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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