1,720,954 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
Modelagem molecular de ZIF-8 pristina e modificada termicamente: aplicações para captura de carbono
Get PDFIn this work, we study Metal-Organic Frameworks (MOFs) as a new material able to capture CO2 efficiently. These frameworks are promising regarding carbon capture due to high surface areas, tunable pore size, and a high potential for industrial-scale production. In particular, we study a specific MOF, the Zeolitic Imidazolate Framework 8 (ZIF-8), composed of zinc coordinated with imidazole, structured in a sodalite framework. Through first- principles calculations based on the Density Functional Theory (DFT) using a functional with nonlocal van der Waals correction, the optB86b, we investigate CO2 adsorption in ZIF-8 by identifying different adsorption sites and their respective adsorption energy. Furthermore, using atomistic simulations based on Grand Canonical Monte Carlo, the selectivity of carbon considering reservoirs with different mixtures at distinct concentrations and thermodynamic conditions was calculated. Moreover, recent experimental findings indicate that thermal post- treatment of ZIF-8 can enhance its carbon capture capability. Therefore, we modeled propositions of possible defects induced by this kind of treatment and study their stability and how they affect adsorption. Our results indicate that thermal treatments near 900 ºC can enhance carbon capture up to 15 to 18.5 times the CO2 uptake of pristine ZIF-8. Since thermal treatments are cheap and easy to be scaled, these treatments can designate ZIF-8 treated as a proper filler to be used in mixed-matrix membranes, enabling a membrane design that can be efficient and economically viable to capture carbon.Nesse trabalho estudamos Estruturas Metal-Orgânicas (MOFs, do inglês Metal- Organic Frameworks) como um novo material capaz de capturar dióxido de carbono (CO2) eficientemente. Essas estruturas são muito promissoras quanto à captura de carbono devido à sua grande área de superfície, tamanho de poro ajustável e um alto potencial de escalabilidade à nível industrial. Em particular, estudamos uma MOF específica, a Estrutura Zeolítica de Imidazolato 8 (ZIF-8, do inglês Zeolitic Imidazolate Framework 8) composta por zinco coordenado com imidazol, estruturado como uma sodalita. Através de cálculos de primeiros princípios baseados na Teoria do Funcional da Densidade (DFT), utilizando um funcional com correções não locais de van der Waals, optB86b, investigamos a adsorção de CO2 na ZIF-8, identificando diferentes sítios e as respectivas energias de adsorção. Além disso, por meio de simulações atomísticas, utilizando Monte Carlo no ensemble Grã Canônico, foi calculado a seletividade de carbono considerando reservatórios com diferentes misturas em diferentes concentrações e condições termodinâmicas. Ademais, recentes resultados experimentais indicam que o tratamento térmico da ZIF-8 pode aumentar a sua capacidade de captura de carbono. Assim, modelamos proposições de como os defeitos são induzidos por esses tratamentos e estudamos suas estabilidades e impactos na adsorção. Nossos resultados indicam que os tratamentos térmicos perto de 900 ºC podem aumentar a captura de carbono de 15 a 18.5 vezes a adsorção de ZIF-8 pristino. Sendo assim, esses tratamentos podem designar a ZIF-8 tratada como um adequado material a ser usado em membranas de matrizes mistas, permitindo um design de membrana que seja eficiente e economicamente viável para captura de carbono
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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