1,721,040 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
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
Obtención de híbridos triploides de cítricos
Get PDFLa presencia de semillas en los frutos de mandarina es una característica indeseable ya que el mercado de consumo en fresco no acepta frutos con semillas. Los híbridos triploides de cítricos son de gran interés ya que no producen semillas ni inducen la formación de semillas en otros genotipos por polinización cruzada. Los híbridos triploides se pueden obtener mediante hibridación somática entre protoplastos haploides y diploides y mediante hibridación sexual entre parentales diploides y entre parentales diploides y tetraploides. El objetivo general de esta tesis doctoral es la obtención de parentales para la producción de híbridos triploides de cítricos, la caracterización de los diferentes tipos de hibridaciones sexuales que permiten obtener híbridos triploides y un mejor conocimiento de la biología reproductiva de los cítricos en relación con la obtención de híbridos triploides. Estos objetivos generales se concretan en los siguientes objetivos específicos: 1.Obtención de plantas haploides mediante la técnica de ginogénesis in situ inducida por polen irradiado y posterior rescate y cultivo de embriones in vitro. Se han obtenido genotipos haploides, dobles haploides y aneuploides de clementina `Clemenules´ y uno de los genotipos haploides ha sido elegido por el Consorcio Internacional de Genómica de Cítricos para la secuenciación del genoma completo de los cítricos. 2.Obtención de plantas tetraploides de diferentes genotipos apomícticos de mandarinos, naranjos dulces y pomelos que puedan ser utilizados como parentales masculinos en hibridaciones 2x X 4x para la obtención de híbridos triploides. Mediante citometría de flujo se han
identificado plantas tetraploides espontáneas en 15 genotipos de los 17 estudiados, con frecuencias que oscilaron entre el 9,7% en mandarino `Kinnow´ y el 0,5% en mandarino `Page´. Se demuestra que todos los genotipos tetraploides obtenidos proceden de la duplicación del número de cromosomas de células de la nucela. 3.Obtención de plantas tetraploides de genotipos no
apomícticos de mandarino que puedan ser utilizadas como parentales masculinos y femeninos en hibridaciones 2x X 4x y 4x X 2x. Para ello se realizó el microinjerto in vitro de ápices caulinares tratados con colchicina y orizalina. Se han obtenido plantas tetraploides a partir de la brotación directa del ápice microinjertado y a partir de la segregación de citoquimeras, obteniendo plantas tetraploides estables de las clementinas `Clemenules´, `Fina´, `Marisol´ y mandarino `Moncada´. 4.Obtención de
híbridos triploides mediante hibridaciones 2x X 2x, 2x X 4x y 4x X 2x. Se demuestra que los embriones triploides se encuentran en diferentes tipos de semillas en función del tipo de hibridación realizada y se propone una mejora en cada etapa del proceso de obtención de híbridos triploides. Se evaluaron las eficiencias de las diferentes estrategias en función de los genotipos parentales. Las hibridaciones 4x X 2x y 2x X 4x presentaron la mayor eficiencia en la obtención de híbridos triploides; sin embargo en aquellos genotipos capaces de producir frecuencias muy elevadas de gametos 2n, como mandarino `Fortune´, la estrategia 2x X 2x es muy eficiente. Los resultados obtenidos también demuestran la gran influencia que tiene el parental masculino en la obtención de híbridos triploides, lo que implica la selección de una estrategia u otra. Por fin, se discuten las implicaciones de los
diferentes tipos de hibridación a nivel de las segregaciones y de la diversidad genotípica teórica de las poblaciones triploides. 5.Determinación del origen genético de las plantas regeneradas a partir de semillas parcialmente desarrolladas originadas en las hibridaciones 2x X 4x utilizando genotipos no apomícticos como parentales femeninos. Se demuestra con marcadores microsatélites que el origen de este tipo de poliembrionía ocurre como consecuencia de una embriogénesis secundaria a partir
del embrión zigótico original. Así mismo, esta característica se confirma mediante la regeneración de plantas a partir del cultivo de nucelas in vitro de genotipos no apomícticos de cítricos. Se concluye que la formación de embriones adventicios a partir del embrión zigótico original es un fenómeno frecuente en los genotipos no apomícticos de cítricos y que el desarrollo de estos embriones está generalmente inhibido por el embrión principal. Se discuten las implicaciones que tiene este mecanismo en los programas de mejora genética y además se describe por primera vez la ocurrencia de este mecanismo en la biología reproductiva de los genotipos no apomícticos de cítricos. 6.Establecer un perfil molecular con marcadores microsatélites de 15 nuevos híbridos triploides de mandarino presentados por el Instituto Valenciano de Investigaciones Agrarias en el Registro de Variedades Protegidas de la Oficina Española de Variedades Vegetales. El análisis genético se realizó con un secuenciador automático mediante electroforesis capilar que permite calcular para marcadores heterocigóticos la dosis alélica de cada híbrido triploide lo que genera una diferenciación varietal mucho más potente
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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