1,720,953 research outputs found
Glass waste as a substitute for fine aggregate in mixtures hot machined asphalt
No full textAsphalt paving is a technique involving the creation of asphalt mixtures composed of
asphalt binder and natural aggregates. In this context, there is a constant need to
exploit these natural resources for road paving and maintenance. Therefore, studies
that seek alternative materials to replace aggregates are useful. One such material is
glass, which in Brazil has low recycling rates and is primarily disposed of in landfills.
Thus, this study aimed to investigate the replacement of sand with glass powder in hotmix
asphalt at proportions of 20%, 50%, and 100%. The methodology involved testing
to characterize the aggregates and glass powder, as well as conducting Marshall
stability tests and tensile strength tests to evaluate the mechanical behavior of the
asphalt mixtures. The results of the granulometric analysis of sand and glass powder
showed that both materials have similar granulometric curves. Consequently, this
finding indicated that there were no significant changes for the working range used in
this research, Range C. Regarding mechanical behavior, all studied proportions
yielded results above the minimum defined by DNIT Standard 031/2006. Specifically,
the proportion with 50% sand replacement with glass powder met both mechanical and
volumetric parameters, demonstrating it as the most suitable option for replacement.
Therefore, it is understood that replacing natural aggregate with glass powder is a
viable solution for use in asphalt mixtures and provides a sustainable way to reduce
natural aggregate exploitation while giving an additional use to glassA pavimentação asfáltica é uma técnica que consiste na execução de misturas
asfálticas, compostas por ligante asfáltico e agregados naturais. Nesse sentido,
necessita-se da constante exploração destes recursos naturais para a pavimentação
de vias e manutenção dos pavimentos rodoviários. Desse modo, tornam-se úteis
estudos que buscam materiais alternativos para substituição dos agregados, no qual
pode-se citar o vidro, material que, no Brasil, apresenta baixas taxas de reciclagem e
cujo principal destino final são os aterros sanitários. Assim sendo, este trabalho
objetivou o estudo da substituição da areia por pó de vidro em misturas asfálticas
usinadas a quente em proporções de 20%, 50% e 100%. Para isso, a metodologia
consistiu em ensaio para caracterização dos agregados e do pó de vidro, ensaios de
estabilidade Marshall e resistência à tração, para a avaliação do comportamento
mecânico das misturas asfálticas. Os resultados da granulometria da areia e do pó de
vidro demonstraram que ambos materiais possuem curvas granulométricas similares.
Logo, tal achado o contribuiu para que não houvesse alterações significativas para a
faixa de trabalho utilizada na presente pesquisa, faixa C. Assim, no que se refere ao
comportamento mecânico, todas as proporções estudadas apresentaram resultados
acima do mínimo definido pela Norma DNIT 031/2006, no qual a proporção com 50%
de substituição da areia pelo pó de vidro atendeu tanto aos ensaios mecânico, quanto
aos parâmetros volumétricos analisado, desta forma, demonstrando ser a opção mais
adequada para substituição. Portanto, entende-se que a substituição do agregado
natural pelo pó de vidro é uma solução viável para aplicação em misturas asfálticas,
além de ser um meio sustentável para a diminuição da exploração do agregado natural
e fornecer uma utilidade extra ao vidr
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
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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