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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
Ανάπτυξη ευφυών υπολογιστικών μεθόδων για την επίλυση χρονικά μεταβαλλόμενων προβλημάτων
No full textThis PhD thesis presents the development of novel recurrent neural network (RNN) architectures, introducing new activation functions and discrete-time formulations to address time-varying problems in numerical linear algebra. While nonlinear activation functions have been shown to enhance the convergence speed of Zeroing Neural Network (ZNN) models, existing ZNN frameworks typically impose strict constraints—requiring activation functions to be both strictly odd and monotonically increasing. These limitations reduce the flexibility and expressive capacity of the models, underscoring the need for innovation in this area. In response, this thesis proposes enhanced models that significantly improve the accuracy and convergence performance of traditional approaches. The thesis is structured into four chapters. Chapter One introduces foundational concepts from mathematical analysis and matrix theory that support the structure of RNN models. It also reviews key definitions related to RNNs, common recurrent architectures, and widely used activation functions. Essential theorems from dynamical systems theory and core programming techniques employed throughout the research are also discussed. The chapter concludes with a survey of real-world applications where RNNs have proven effective in solving practical problems. Chapter Two extends the Zhang Neural Network (ZNN) framework to handle cases where the time derivative of the Zhangian function does not exist at certain points. To address such scenarios—where the indefinite error function E(t), whether matrix-, vector-, or scalar-valued, contains non-differentiable elements—two novel approaches are proposed. In addition, a new family of activation functions, specifically designed for integration within the ZNN framework, is introduced. These are used to construct advanced models for solving time-varying matrix equations, including the Stein, Sylvester, and Generalized Sylvester equations. Compared to earlier nonlinear RNN models with conventional activation functions, the proposed models exhibit significantly improved convergence rates. Simulink-based simulations validate the effectiveness of these models, demonstrating both faster convergence and improved solution accuracy. In Chapter Three, the thesis explores the application of discretization techniques to the ZNN framework, resulting in the formulation of novel discrete-time RNN models. These models are employed to solve a range of mathematical problems, such as matrix inversion and nonlinear optimization. Additionally, the discrete-time models are applied to robotics tasks, including robotic manipulator control and tracking control for the Stewart platform. Experimental results show that these models outperform existing discrete-time methods in terms of accuracy. Finally, Appendices A and B include Simulink diagrams of the baseline RNN models and activation functions used in comparative analyses, alongside those of the novel formulations proposed in this work.Η παρούσα διδακτορική διατριβή παρουσιάζει την ανάπτυξη νέων αρχιτεκτονικών επαναλαμβανόμενων νευρωνικών δικτύων (Recurrent Neural Networks − RNNs), εισάγοντας νέες συναρτήσεις ενεργοποίησης και διακριτές χρονικές διατυπώσεις, με στόχο την αντιμετώπιση χρονικά μεταβαλλόμενων προβλημάτων της αριθμητικής γραμμικής άλγεβρας. Αν και έχει αποδειχθεί ότι οι μη γραμμικές συναρτήσεις ενεργοποίησης βελτιώνουν την ταχύτητα σύγκλισης των μοντέλων Zeroing Neural Network (ZNN), τα υφιστάμενα πλαίσια ZNN επιβάλλουν αυστηρούς περιορισμούς—απαιτώντας οι συναρτήσεις ενεργοποίησης να είναι ταυτόχρονα περιττές και μονότονα αύξουσες. Αυτοί οι περιορισμοί μειώνουν την ευελιξία και την εκφραστική ικανότητα των μοντέλων, αναδεικνύοντας την ανάγκη για καινοτομία στον τομέα αυτό. Ως απάντηση, η διατριβή προτείνει ενισχυμένα μοντέλα που βελτιώνουν σημαντικά την ακρίβεια και την απόδοση σύγκλισης των παραδοσιακών προσεγγίσεων. Η διατριβή οργανώνεται σε τέσσερα κεφάλαια. Στο Πρώτο Κεφάλαιο εισάγονται θεμελιώδεις έννοιες από τη μαθηματική ανάλυση και τη θεωρία πινάκων που υποστηρίζουν τη δομή των RNN μοντέλων. Παρουσιάζονται βασικοί ορισμοί σχετικοί με τα RNN, οι πιο διαδεδομένες επαναλαμβανόμενες αρχιτεκτονικές, καθώς και ευρέως χρησιμοποιούμενες συναρτήσεις ενεργοποίησης. Επιπλέον, συζητούνται βασικά θεωρήματα από τη θεωρία δυναμικών συστημάτων και προγραμματιστικές τεχνικές που χρησιμοποιούνται καθ’ όλη τη διάρκεια της έρευνας. Το κεφάλαιο ολοκληρώνεται με μια επισκόπηση εφαρμογών πραγματικού κόσμου όπου τα RNN έχουν αποδειχθεί αποτελεσματικά στην επίλυση πρακτικών προβλημάτων. Στο Δεύτερο Κεφάλαιο επεκτείνεται το πλαίσιο του Zhang Neural Network (ZNN) ώστε να αντιμετωπίζει περιπτώσεις στις οποίες η χρονική παράγωγος της Zhang συνάρτησης δεν υφίσταται σε ορισμένα σημεία. Για την επίλυση τέτοιων περιπτώσεων—όπου η συνάρτηση σφάλματος E(t), είτε πρόκειται για πίνακα, διάνυσμα ή βαθμωτή ποσότητα, περιέχει μη διαφορίσιμα στοιχεία—προτείνονται δύο νέες προσεγγίσεις. Επιπλέον, εισάγεται μια νέα οικογένεια συναρτήσεων ενεργοποίησης, σχεδιασμένη ειδικά για ενσωμάτωση στο πλαίσιο ZNN. Οι συναρτήσεις αυτές χρησιμοποιούνται για την κατασκευή προηγμένων μοντέλων επίλυσης χρονικά μεταβαλλόμενων εξισώσεων πινάκων, όπως οι εξισώσεις Stein, Sylvester και Γενικευμένη Sylvester. Σε σύγκριση με προηγούμενα μη γραμμικά RNN μοντέλα με συμβατικές συναρτήσεις ενεργοποίησης, τα προτεινόμενα μοντέλα παρουσιάζουν σημαντικά βελτιωμένους ρυθμούς σύγκλισης. Προσομοιώσεις σε περιβάλλον Simulink επιβεβαιώνουν την αποτελεσματικότητα των μοντέλων, καταδεικνύοντας ταχύτερη σύγκλιση και αυξημένη ακρίβεια των λύσεων. Στο Τρίτο Κεφάλαιο εξετάζεται η εφαρμογή τεχνικών διακριτοποίησης στο πλαίσιο των ZNN δικτύων, οδηγώντας στη διαμόρφωση νέων διακριτών χρονικών μοντέλων RNN. Τα μοντέλα αυτά χρησιμοποιούνται για την επίλυση ποικίλων μαθηματικών προβλημάτων, όπως η αντιστροφή πινάκων και η μη γραμμική βελτιστοποίηση. Επιπλέον, τα διακριτά μοντέλα εφαρμόζονται σε ρομποτικές εφαρμογές, όπως ο έλεγχος ρομποτικού βραχίονα και ο έλεγχος παρακολούθησης της πλατφόρμας Stewart. Τα πειραματικά αποτελέσματα δείχνουν ότι τα προτεινόμενα μοντέλα υπερέχουν των υπαρχόντων διακριτών μεθόδων ως προς την ακρίβεια. Τέλος, τα Παραρτήματα Α και Β περιλαμβάνουν τα διαγράμματα Simulink των βασικών RNN μοντέλων και των συναρτήσεων ενεργοποίησης που χρησιμοποιήθηκαν στις συγκριτικές αναλύσεις, καθώς και εκείνων που προτείνονται στο πλαίσιο αυτής της εργασίας
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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