1,721,090 research outputs found
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
Reconstruction and energy extrapolation of the implosion core for low-converging cryogenic implosions
Get PDFLAUREA MAGISTRALEIl presente lavoro di tesi si colloca nel contesto di ricerca di fusione a confinamento inerziale (ICF).
In questo approccio, lo scopo \`{e} di far implodere un bersaglio in modo da scaldarne il centro a temperature di milioni di gradi , con lo scopo di ottenere un sufficiente numero di reazioni di fusione nucleare, causando un'instabilit\`{a} termonucleare che permetta di ottenere pi\`{u} energia di quella introdotta nel sistema. Esperimenti di fusione che rispettino i criteri menzionati non sono mai stati effettuati in laboratorio.
Le due strutture prinicipali nell'ambito di ricerca ICF negli Stati Uniti sfruttano due approcci differenti: la National Ignition Facility (NIF) si concentra prevalentemente in approccio indiretto, mentre il laser OMEGA conduce esperimenti in approccio diretto a simmetria sferica. NIF correntemente non pu\`{o} essere configurato in modo da ottenere illuminazione diretta a simmetria sferica; di conseguenza, le implosioni su una scala minore effettuate su OMEGA sono utilizzate come surrogato per testare l'approccio diretto.
Lo scopo della presente tesi consiste nel fornire estrapolazioni idroequivalenti per implosioni con alto adiabat e bassa convergenza effettuate su OMEGA, sulla scala di NIF, ovvero a energie laser tra 1.9 e 2.5 MJ. I valori stimati per l'energia prodotta sulla scala di NIF con configurazione diretta a simmetria sferica sono stati stimati essere tra 5 e 8 volte superiori ai valori migliori ottenuti su NIF ad oggi.
Questo lavoro di natura computazionale consiste nella ricostruzione degli esperimenti di OMEGA, seguita da un riscalamento alle energie di NIF, usando la teoria di idro-equivalenza, fornendo cos\`{i} stime per le principali osservabili.
Gli strumenti utilizzati per questa analisi consistono in un codice di implosione 1-D per la fase di accelerazione e in un codice di fluidodinamica radiativa 2-D, utilizzato per simulare la fase di decelerazione. \`{E} necessario sottolineare che \`{e} possibile che le ricostruzioni trovate in questo lavoro di tesi non siano uniche, ma permettono di avere un buon accordo con i valori sperimentali.The current thesis work was done in the context of inertial confinement fusion (ICF) research.
In this approach to nuclear fusion energy research, the goal is to implode a target in order to heat its center to millions of degrees to produce sufficient fusion reactions, initiating a thermonuclear instability allowing to obtain more energy than is put into the system. Controlled nuclear fusion fullfilling these energy criteria has yet to be achieved in laboratory setting.
The two facilities currently pursuing ICF research in the U.S.A. rely on two different approaches: the National Ignition Facility (NIF) mainly focuses on indirect drive, while the OMEGA laser pursues spherically-symmetric direct drive.
Since the NIF laser beams cannot currently be reconfigured to produce a spherically-symmetric direct illumination, the smaller scale implosions at OMEGA and used as a surrogate to test the direct drive approach.
It is the goal of this thesis project to provide extrapolations for high-adiabat, low-converging cryogenic OMEGA implosions to NIF energies of 1.9 to 2.5 MJ, in order to motivate NIF to pursue direct illumination in the future. Currently, it is estimated that fusion energy outputs of the order of 5 times the current highest energy output obtained on NIF for the 1.9 MJ case and of the order of 8 times in the 2.5 MJ case can be obtained on NIF with spherically-symmetric direct illumination.
This work is mainly computational and relies on the reconstructon of implosion experiments performed on the OMEGA laser and a subsequent energy scaling to NIF energies using the theory of hydro-equivalent scaling, thus providing estimates for the main experimental observables.
The computational tools used for this analysis are a 1-D implosion code for the acceleration phase of the implosion and a 2-D radiation hydrodynamics code used to simulate the deceleration phase of implosions. It should be pointed out that the reconstructions found for the purposes of this work may not be unique, but provide a close match with the experimental observables
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
- …
