1,720,956 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
Simulationsbasierte Optimierung in der Reihenfolgeplanung
No full textUnter steigendem Kostendruck und den Kundenbedürfnissen nach kurzen Lieferzeiten sowie hoher Termintreue kommt der effizienten Planung und Steuerung der Herstellprozesse in produzierenden Unternehmen zentrale Bedeutung zu. Als Teil der Produktionssteuerung befasst sich die Reihenfolgeplanung dabei mit der Optimierung der Zuweisung von Fertigungsaufträgen zu Produktionskapazitäten. Im Falle flexibler Kleinserien-Fertigungen ergeben sich bei dieser Problemstellung spezifische Rahmenbedingungen. Vor diesem Hintergrund wird im Rahmen der vorliegenden Arbeit beurteilt, welche Methoden geeignet sind, die Reihenfolgeplanung für Make-to-Order Gegebenheiten in einer Werkstätten- oder Reihenfertigung zu optimieren. Zu diesem Zweck soll ein Simulations-Programm entwickelt werden, das Warteschlangensysteme in Form diskreter Ereignissimulation modelliert - Die Implementierung eines solchen Frameworks ist dabei primärer Gegenstand der Untersuchung. Die resultierende Simulation soll durch einen flexiblen Aufbau verschiedenartige Produktionsszenarien abbilden und diese anhand gängiger Kennzahlen wie Umlaufbestand, Durchlaufzeit und Liefertreue bewerten können. Das Simulationsprogramm basiert dabei auf dem Konzept der objektorientierten Programmierung und die zur Modellierung angewendete Vorgehensweise wird hinsichtlich ihrer wesentlichen Konzepte und Rahmenbedingungen erläutert. Ergänzend zur Entwicklung der grundlegenden Modellstruktur sollen Prioritätsregeln als Steuerungsmechanismus der Fertigungsreihenfolge integriert werden. Die Funktionsweise der Software und die Analyse der Simulationsergebnisse werden dabei exemplarisch anhand von Realdaten erläutert. Im Rahmen dieser Versuche kann gezeigt werden, dass die Prioritätsregel Least Slack per Remaining Operation dazu beitragen kann, die Liefertreue einer Produktion zu erhöhen. Die Reihung nach aufsteigender Restbearbeitungszeit (Shortest Remaining Processing Time) hingegen, führt zu einer deutlichen Reduktion von Umlaufbestand und Durchlaufzeit, hat aber gleichzeitig negativen Einfluss auf die Termintreue. Zusätzlich wird gezeigt, dass die Reduktion der Auftragslosgröße bei ausreichend kleinen Rüstzeiten die Verbesserung aller drei Kenngrößen bewirken kann.Today, manufacturers are faced with increasing customer needs and growing competition from globalized markets. It is therefore imperative to optimize planning processes with regards to short lead times, low inventory levels and satisfying delivery reliability. In this context, job production and batch production pose specific challenges which require consideration. Sequencing represents a part of short term, operative production planning and is concerned with efficiently allocating jobs to production resources. This thesis aims at finding appropriate methods to optimize sequencing for make-to-order manufacturers within a job or batch production environment. For this purpose, a custom event simulation program is developed in the form of a C# application. Using object oriented programming, the simulation is designed as a queueing system which is capable of modelling all production facilities in high detail. It allows for monitoring the system’s behavior, measuring and evaluating a variety of performance indicators as well as examining the viability of specific changes to the production plant. The simulation’s underlying framework is described comprehensively and is used in order to completely model a batch production system. Consequently, priority rules, a heuristic approach to sequencing, are integrated into the simulation program. Based on three commonly used performance indicators (mean throughput time, mean WIP inventory and delivery reliability), case scenarios are defined and evaluated. Real case data is then used in order to evaluate the program and to obtain simulation results. These confirm that the priority rule Least Slack per Remaining Operation is useful in order to increase delivery reliability. If the company’s objectives comprise short throughput times and low WIP inventory, ordering jobs/batches by the Shortest Remaining Processing Time represents a good solution. Additionally, job orders with smaller lot sizes are tested and the corresponding results show substantial improvements in all three aforementioned categories in case of short setup times.Masterarbeit Wien, FH Technikum Wien 201
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
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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