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Kopperatives Management und Nutzung verteilter Kookkurrenzgraphen
Get PDFThe property of terms to occur adjacently, or in close vicinity, in text corpora can be expressed by co-occurrence graphs. Such data structures proved to be useful tools to extract semantic information in natural language processing and information retrieval. Particularly when organisations and communities work collaboratively on joint documents and corpora, the corresponding co-occurrence graphs may grow prohibitively large to be handled on a single machine.
Hence, methods are devised to cooperatively distribute and process co-occurrence graphs in peer-to-peer computing environments, whose performance shows a near-linear speed-up as compared to the capability of a single processor. Moreover, in each peer, a local co-occurrence graph is built from documents of the users attached to the peer and obtained from elsewhere. These local graphs are used to calculate text centroids from terms contained in them as unique document identifiers and as search keys in queries. They are also useful in reducing the amount of broadcast traffic. Routing and load imbalance of inter-peer traffic are reduced by bio-inspired algorithms designed to work with limited information available on peers locally or on their direct neighbours. Thus, routing paths directly leading to the final destinations are determined in most cases, and memory usage is balanced after a few message exchanges.
To show that decentralised co-occurrence graphs can be employed as the basis of a fully integrated, decentralised search engine, a prototype working on the world wide web is built, implemented, and experimentally evaluated. This search engine uses text centroids to represent short word groups constituting queries as well as long texts in crawling the web for information and for matching queries with documents.Die Eigenschaft von Begriffen, in Textkorpora nebeneinander oder in unmittelbarer Nähe aufzutreten, wird üblicherweise durch Kookkurrenzgraphen modelliert. Derartige Strukturen haben sich als nützliche Werkzeuge zur Extraktion semantischer Informationen in der Verarbeitung natürlicher Sprache und im Information Retrieval bewährt. Arbeiten Organisationen und Gemeinschaften gemeinsam an Dokumenten und Korpora, können die entsprechenden Kookkurrenzgraphen jedoch so groß werden, dass sie auf einer einzelnen Maschine nicht mehr verarbeitet werden können.
Daher werden in der ARbeit zunächst Methoden entwickelt, um Kookkurrenzgraphen in Peer-to-Peer-Umgebun- gen kooperativ zu erstellen und zu verarbeiten. Diese Verarbeitungsumgebungen ermöglichen hierbei durch ihre Leistung eine nahezu lineare Beschleunigung im Vergleich zu den Fähigkeiten eines einzelnen Prozessors aufweist. Darüber hinaus wird durch das System für jeden Peer ein lokaler Kookkurrenzgraph verwaltet, der aus den Dokumenten der Benutzer, die dem Peer zugeordnet sind, und ggf. aus weiteren, interessanten Quellen erstellt wird. Diese lokalen Graphen werden verwendet, um Zentroide zu berechnen, die dann als einzelner Term eine Dokumentenkennung und als Suchschlüssel in Abfragen dient. Sie enthalten ferner nützliche Informationen, um den Umfang von Broadcasts zu verringern. Routing und Lastungleichgewichte zwischen den Peers werden durch biologisch inspirierte Algorithmen verbessert bzw. reduziert, die mit begrenzten Informationen von dem lokalen Peers bzw. seiner direkten Nachbarn arbeiten. Damit können in den meisten Fällen Routingpfade ermittelt werden, die auf optimalen Wegen zu den Endzielen führen; in Bezug auf die Speichernutzung kann hierdurch nach einigen wenigen Schritten einen Ausgleich erzielt werden.
Es wird außerdem gezeigt, daß ein dezentralisierte verwalteter Kookkurrenzgraph als Grundlage für eine vollstän-dig integrierte, dezentrale Suchmaschine verwendet werden kann; ein Prototyp hierzu, der im heutigen World Wide Web funktioniert und verwendet werden kann, wird entworfen, implementiert und experimentell evaluiert. Diese Suchmaschine verwendet Textzentroide, um zu Suchanfragen und Nutzerinteressen passende Dokumente zu finden
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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