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Στρατηγικές ευφυών προγραμματιζόμενων δικτύων για αποδοτικές εφαρμογές επόμενης γενιάς
No full textNext-generation Internet Applications (NIA), such as smart-cities and multi-media applications like virtual reality, provide the technological foundation and capabilities necessitated for digital transformation in various economic sectors. With the widespread adoption of these applications, network requirements have become increasingly demanding e.g., they require ultra-low delay for rapid decision-making and high throughput for transferring large amounts of data. In this thesis, we focus on the development of efficient network strategies in order to improve the performance of two specific types of NIA: IoT and cloud-native applications. We focus on two primary network environments that require adaptability to fulfill the needs of the aforementioned NIA: (i) large-scale wireless-based IoT deployments (e.g., smart cities) and (ii) cloud environments that host microservice-based applications with heterogeneous resource demands. In this context, we investigate the potential advantages derived from a synergy of cloud computing, Software-Defined Networking (SDN), Named-Data Networking (NDN), and the microservices paradigm in enhancing NIA performance through efficient traffic steering. Also, we argue that the centralized control feature of SDNs is an appropriate solution for integrating these technologies and creating a highly adaptive network ecosystem. The research is concentrated around three key areas: (i) improving IoT applications' adaptability to Wireless Mesh Network (WMN) to ensure consistent and reliable performance; (ii) implementing microservices adaptive load balancing, which implements efficient resource allocation and utilization, enabling applications to handle a larger number of simultaneous requests without performance compromise; and (iii) predicting the impact of individual microservices on network and processing resources, thereby support the decisions of resource allocation control mechanisms. In order to tackle the aforementioned challenges, this research focuses on the development and evaluation of realistic applications and SDN network environments over WMN, including as well as real indoor and outdoor testbeds. The objective is to promote a framework where NIA can exhibit greater responsiveness and resource efficiency by adapting to the dynamic WMNs and cloud resource requirements.Οι Διαδικτυακές Εφαρμογές Επόμενης Γενιάς (Next-generation Internet Applications, NIA), όπως εφαρμογές του Διαδικτύου των Πραγμάτων (ΙοΤ) και οι εφαρμογές πολυμέσων (π.χ., εικονική πραγματικότητα), παρέχουν την τεχνολογική βάση και τις δυνατότητες που απαιτούνται για τον ψηφιακό μετασχηματισμό σε διάφορους τομείς της οικονομίας. Συνεπώς, με την ευρεία υιοθέτηση αυτών των εφαρμογών οι δικτυακές απαιτήσεις αυξάνονται σημαντικά, π.χ. οι NIA συχνά απαιτούν εξαιρετικά χαμηλή καθυστέρηση για γρήγορη λήψη αποφάσεων, και υψηλή απόδοση για τη μεταφορά μεγάλου όγκου δεδομένων. Σε αυτή τη διατριβή, εστιάζουμε στην ανάπτυξη δικτυακών στρατηγικών για τη βελτίωση της απόδοσης δύο συγκεκριμένων τύπων NIA: (i) εφαρμογές του Διαδικτύου των Πραγμάτων και (ii) εφαρμογές που παρέχονται στο υπολογιστικό νέφος. Η παρούσα διατριβή, επικεντρώνει σε δύο κύρια δικτυακά περιβάλλοντα που απαιτούν προσαρμοστικότητα για την κάλυψη των αναγκών των προαναφερθεισών NIA: (i) μεγάλης κλίμακας ασύρματες αναπτύξεις IoT (π.χ., έξυπνες πόλεις) και (ii) περιβάλλοντα υπολογιστικού νέφους που φιλοξενούν εφαρμογές βασισμένες σε μικροϋπηρεσίες με ετερογενείς απαιτήσεις για υπολογιστικούς πόρους. Σε αυτό το πλαίσιο, ερευνούμε τα πιθανά πλεονεκτήματα που προκύπτουν από τη συνέργεια του: (i) υπολογιστικού νέφους, (ii) των προγραμματιζόμενων δικτύων (Sofrware-Defined Networks, SDN), (iii) της δικτύωσης που βασίζεται σε ονοματοποιημένα δεδομένα (Named-Data Networking, NDN) και (iv) της αρχιτεκτονικής των μικροϋπηρεσιών, στοχεύοντας τη βελτίωση της απόδοσης των NIA μέσω αποτελεσματικής διαχείρισης της κυκλοφορίας. Επίσης, υποστηρίζουμε ότι η δυνατότητα του κεντροποιημένου ελέγχου των SDN είναι κατάλληλη λύση για την ενσωμάτωση των προαναφερθέντων τεχνολογιών επιτρέποντας τη δημιουργία ενός εξαιρετικά προσαρμοστικού δικτυακού οικοσυστήματος. Εστιάζουμε σε τρεις βασικούς άξονες: (i) στη βελτίωση της προσαρμοστικότητας των εφαρμογών IoT που παρέχονται πάνω από δίκτυα ασύρματου πλέγματος, για τη διασφάλιση συνεπούς και αξιόπιστης επικοινωνίας, (ii) στην εφαρμογή εξισορρόπησης φορτίου που προσαρμόζεται στο είδος των μικροϋπηρεσιών, η οποία υλοποιεί αποτελεσματική κατανομή και αξιοποίηση πόρων, επιτρέποντας στις εφαρμογές να ανταποκρίνονται σε μεγαλύτερο αριθμό ταυτόχρονων αιτημάτων χωρίς περιορισμούς στην απόδοση, και (iii) στην πρόβλεψη του αντίκτυπου των μικροϋπηρεσιών στους πόρους, υποστηρίζοντας έτσι τις αποφάσεις των μηχανισμών ελέγχου της κατανομής πόρων. Προκειμένου να αντιμετωπιστούν οι προαναφερθείσες προκλήσεις, η έρευνα περιλαμβάνει την ανάπτυξη και αξιολόγηση πραγματικών εφαρμογών και SDN δικτυακών περιβαλλόντων, συμπεριλαμβανομένου και του πειραματισμού σε πραγματικά δίκτυα ασύρματου πλέγματος. Ο στόχος είναι να προωθηθεί ένα πλαίσιο όπου οι NIA θα μπορούν να επιδείξουν μεγαλύτερη απόδοση και αποτελεσματικότερη κατανομή πόρων, προσαρμόζοντας ‘τες στις δυναμικές συνθήκες του εκάστοτε δικτυακού περιβάλλοντος
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
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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