1,720,953 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
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
Design of scaled-up flow fields for vanadium redox flow battery through 3D CFD modelling and experimental analysis
No full textLAUREA MAGISTRALELa crescente domanda di energia elettrica a livello globale unita alle crescenti preoccupazioni ambientali legate alla produzione di energia favorisce la rapida inclusione di tecnologie rinnovabili e micro-reti nel settore energetico. In questo scenario, vista la natura intermittente delle energie rinnovabili, le tecnologie di stoccaggio si pongono in un ruolo fondamentale per garantire la stabilità e mantenere un'elevata efficienza della rete. Tra i sistemi di accumulo di energia elettrochimica, le batterie a flusso di vanadio (VRFBs) sono uno dei dispositivi più promettenti per applicazioni stazionarie su larga scala grazie alla loro elevata efficienza complessiva, alla loro lunga vita utile e all’indipendenza tra potenza ed energia. Nonostante questi vantaggi, non sono competitive sul mercato a causa dell'alto costo e della bassa densità di energia e di potenza.
L’obiettivo della tesi è quello di aumentare le dimensioni di una VRFB fino al livello di prototipo a partire da una cella su scala di laboratorio. L'attenzione si concentra sull'effetto che l'architettura del flow field ha sulle prestazioni della cella, sulla durata dei cicli e sul suo impatto sul fenomeno della cross-contamination e sulle cadute di pressione. La fase di progettazione è assistita da un modello fisico CFD tridimensionale. Infatti, comprendendo come le quantità fluidodinamiche ed elettrochimiche della cella siano influenzate dalla geometria del flow field i distributori più promettenti possono essere selezionati e successivamente analizzati attraverso una dettagliata campagna sperimentale. Diverse geometrie interdigitated caratterizzate da diversi principi di funzionamento sono studiate con particolare attenzione, valutando l'effetto che i fenomeni di trasporto di massa e la distribuzione dei reagenti hanno su scale più grandi. In una seconda fase vengono valutate le prestazioni cicliche degli stessi flow field per capire come i fenomeni di cross-contamination e degradazione influenzino le operazioni della batteria. Nel corso dell’elaborato le prestazioni delle celle scalate sono continuamente confrontate con quella della cella di riferimento, per capire come le quantità fluidodinamiche ed elettrochimiche cambino variando la dimensione della cella. Un'ulteriore analisi locale stabilirà l'efficacia delle modifiche locali al flow field mediante inserti in grafite opportunamente progettati.
I risultati della campagna sperimentale sono promettenti. Le informazioni raccolte sull'impatto che l'architettura del flow field ha sui fenomeni caratteristici della batteria pongono le fondamenta per una ricerca approfondita sulle batterie a flusso di vanadio su scala pre-commerciale.The increasing electricity demand worldwide together with the growing environmental concerns related to energy production are favoring the quick inclusion of renewable technologies and micro-grids in the power generation portfolio. In this scenario, considering the intermittent nature of renewable energy, storage technologies play a key role to ensure grid stability and maintain high grid efficiency. Among the electrochemical energy storage systems, Vanadium Redox Flow Batteries (VRFB) are one of the most promising devices for large-scale stationary applications due to their high round-trip efficiency, long lifetime and independence between power and energy. Despite these appealing characteristics, VRFB are not competitive on the market because of the high cost and the low energy and power density.
This thesis objective is to perform a VRFB scale-up to prototype level starting from a lab-scale cell. The focus is placed on the effect that the flow field architecture has on cell performance and cycle life as well as its impact on cross-contamination phenomenon and pressure drops. The design phase is assisted with a 3D CFD physical model, indeed, understanding how the fluid-dynamic and electrochemical quantities of the cell are influenced by the flow field geometry the more promising distributors could be selected and analyzed through a detailed experimental campaign.
Interdigitated geometries characterized by different design concepts are investigated with particular attention to the impact that mass transport phenomena and reactants’ distribution have at larger scales. In a second phase, the flow fields cycling operations are evaluated to understand how cross-contamination and degradation phenomena influence the VRFB cycle life. A continuous comparison with the reference lab-scale cell is performed to understand how fluid-dynamic and electrochemical quantities change varying the cell dimension.
A further local analysis wants to establish the effectiveness of local flow field modifications by means of suitably designed graphite inserts, whose presence influences the velocity field enhancing the mass transport mechanisms, without excessively penalizing the pressure drops.
The entire experimental campaign leads to promising results, especially referring to the cycling operations of the battery. Moreover, the information collected concerning the influence of flow field architecture on characteristic cell phenomena at larger scales lay the foundations for advanced research on pre-commercial scale VRFB
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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