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Comparative study between conventional concrete and concrete with addition of optical fiber
No full textThe main objective of this study is to carry out a comparative study between conventional
concrete and concrete with the addition of optical fiber. To this end, experimental tests of
compressive strength were carried out on cylindrical specimens (28 days) and of light
transmittance on translucent panels manufactured with diameters of 3.00mm, 1.00mm and
0.75mm, containing 4% proportion by volume of fibers for both the specimens and the
translucent panels. The focus of the study is on the comparison between the manufactured
specimens, seeking to evaluate which mixture presented the best results when subjected to
compressive loading and which of the polymeric optical fibers (POF) presented the most
favorable results. Furthermore, we also sought to evaluate and compare the results of light
transmittance on translucent panels under natural light at 10 am, 12 pm, 2 pm and 4 pm on
both sides of the panels (A and B), over 28 days, and under artificial light using an LED lamp.
From the study, it was evident that the specimens with the addition of POF presented lower
compressive strength results when compared to conventional concrete. However, among the
mixtures with addition, it appears that concrete with larger diameter POF (3.00mm) presented
the most favorable results. With regard to light transmittance, it was found that face B of the
panel with a POF of Ø1.00mm presented the most favorable results. However, the total
average result between the panels indicates that the panel with a Ø3.00mm POF obtained the
most satisfactory results under natural light. Under artificial light, the results were very close,
with a slight advantage for the panel with a Ø1.00mm POF, whose difference in relation to
the panel with a larger diameter was only 1 Lux. Therefore, it is concluded that among the
concretes with the addition of optical fiber experimentally tested, the mixture with larger
diameter POF (Ø3.00mm) presented the most favorable results, achieving compressive
strength values closer to conventional concrete and simultaneously obtaining the most
satisfactory total average results in terms of luminous transmittance under natural light, with a
minimal difference under artificial lightO presente estudo tem como principal objetivo realizar um estudo comparativo entre o
concreto convencional e o concreto com adição de fibra ótica. Para isso, foram realizados
ensaios experimentais de resistência à compressão em corpos de prova cilíndricos (28 dias) e
de transmitância luminosa em painéis translúcidos fabricados com diâmetros de 3,00mm,
1,00mm e 0,75mm, contendo 4% de proporção em volume de fibras tanto para os corpos de
prova quanto para os painéis translúcidos. O foco do estudo está na comparação entre os
corpos de prova confeccionados, buscando avaliar qual mistura apresentou os melhores
resultados quando submetida ao carregamento compressivo e qual das fibras óticas
poliméricas (FOP) apresentou os resultados mais favoráveis. Além disso, buscou-se também
avaliar e comparar os resultados de transmitância luminosa nos painéis translúcidos sob luz
natural nos horários de 10h, 12h, 14h e 16h em ambas as faces dos painéis (A e B), ao longo
de 28 dias, e sob luz artificial utilizando uma lâmpada de LED. Pelo estudo, ficou evidente
que os corpos de prova de com adição de FOP apresentaram resultados de resistência à
compressão inferiores quando comparados ao concreto convencional. Entretanto, dentre as
misturas com adição, verifica-se que o concreto com FOP de maior diâmetro (3,00mm)
apresentou os resultados mais favoráveis. No que se refere à transmitância luminosa,
constatou-se que a face B do painel com FOP de Ø1,00mm apresentou os resultados mais
favoráveis. Contudo o resultado médio total entre os painéis indica que o painel com FOP de
Ø3,00mm obteve os resultados mais satisfatórios sob luz natural. Sob luz artificial os
resultados mostraram-se muito próximos, com uma ligeira vantagem para o painel com FOP
de Ø1,00mm, cuja diferença em relação ao painel de maior diâmetro foi de apenas 1 Lux.
Dessa forma, conclui-se que dentre os concretos com adição de fibra ótica ensaiados
experimentalmente, a mistura com FOP de maior diâmetro (Ø3,00mm) apresentou os
resultados mais favoráveis, alcançando valores de resistência à compressão mais próximos do
concreto convencional e obtendo simultaneamente os resultados médios totais mais
satisfatórios no tocante à transmitância luminosa sob luz natural, com uma diferença mínima
sob luz artificia
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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