1,720,956 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Comportamiento de anclajes postinstalados en concreto de alta resistencia, sometidos a carga de tensión y corte.
Full text linkEn los últimos 40 años, el desarrollo mundial en infraestructura ha mostrado un auge en la
construcción de edificaciones de grandes alturas. Hoy día, empresas como Argos son
capaces de producir concretos con resistencias a la compresión de hasta 83 MPa, un
ejemplo de esta tendencia es el rascacielos ‘Burj Khalifa’, edificación que requirió la
colocación de concretos con resistencias máximas de 80 MPa.
La mejora de las características de los concretos, especialmente las relativas a su
resistencia, ejerce una influencia decisiva en la elevación de los valores límites de
resistencia del concreto contemplados en los distintos códigos internacionales. Estos límites
son establecidos por falta de información y ensayos que permitan realizar las tareas de
diseño de manera conservadora.
Esto mismo ocurre en el tema de investigación planteado, situación que se explica en el
apéndice D del reglamento colombiano NSR-10 y el reglamento americano ACI-318-14, en
el cual se establece un límite superior de 55 MPa en el diseño de los anclajes postinstalados
a menos que se realicen los ensayos correspondientes.
Debido a esto, se planteó un programa experimental en el cuál se analizaría el
comportamiento de anclajes postinstalados en concretos de alta resistencia, para esto, se
construyeron 13 losas macizas de concreto, sobre las cuales se anclaron 114 barras
roscadas, donde 78 de estos anclajes fueron ensayados a cargas de tensión, mientras que
el resto se ensayaron a cortante.
Los resultados obtenidos de estos ensayos fueron comparados con las ecuaciones que
determinan la resistencia teórica de los anclajes, así como la modalidad de falla esperada
de los mismos ante diferentes configuraciones geométricas y de materiales. Se pudo
observar que para los ensayos confinados a tensión la falla predominante se presenta en
el acero, al igual que para los ensayos a cortante.
Para los ensayos no confinados se concluyó que para profundidades menores a 2.5 veces
el diámetro para barras de 3/8” la falla predominante es por adherencia, mientras que para
profundidades mayores a 2.5 veces el diámetro y menores a 7.5 veces el diámetro, la falla
predominante es por arrancamiento del concreto, presentándose para barras de 5/8” hasta
profundidades de 5 veces su diámetro. Y finalmente para profundidades mayores a las
descritas predomina la falla del acero.In the last 40 years, the world development in infrastructure has shown a boom in the
construction of buildings of great heights. Today, companies such as Argos are able to
produce concrete with compressive strengths of up to 83 MPa, an example of this trend is
the 'Burj Khalifa' skyscraper, a building that required the placement of concrete with
maximum strengths of 80 MPa.
The improvement of concrete characteristics, especially those related to their strength,
exerts a decisive influence on the elevation of the concrete resistance limit values
contemplated in the different international codes. These limits are established due to lack of
information and tests that allow the design tasks to be carried out conservatively.
The same occurs in the research topic, a situation that is explained in appendix D of the
colombian code NSR-10 and the american ACI-318-14, which establishes an upper limit of
55 MPa in the design of the post-installed anchors unless the corresponding tests are carried
out.
Due to this, an experimental program was proposed in which the behavior of post-installed
anchors in high-strength concrete was analyzed, for this, 13 solid concrete slabs were built,
on which 114 threaded rods were anchored, where 78 of these anchors were tested at
tensile loads, while the rest were shear tested.
The results obtained from these tests were compared with the equations that determine the
theoretical strength of the anchors, as well as the modality of expected failure of the same
with different geometric configurations and materials. It could be observed that for confined
tests, the predominant failure occurs in steel, as well as for shear tests.
For the unconfined tests it was concluded that for depths less than 2.5 times the diameter
for 3/8" rods the predominant fault is for bond failure, while for depths greater than 2.5 times
the diameter and less than 7.5 times the diameter, the fault predominant is by concrete
breakout, appearing for bars 5/8" to depths of 5 times its diameter. And finally, for depths
greater than those described, steel failure predominates.MaestríaMagíster en Ingeniería Civil con Énfasis en Estructura
Variations on the Author
Full text link“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
Full text linkWe 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
Full text linkWe 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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