1,720,954 research outputs found
Structural numerical analysis between plate and solid element models using a "C" profile beam
No full textThis work presents a study on stress analysis in channel “C” beams using plate element
models and solid element models. The search carried out in this study has relevance for
the development of products in aeronautical engineering, especially with regard to stress
analysis in “C” channel beams its application in aircraft structures. The work addresses
the need for solutions based on global models composed of plate elements, proposing
the variation of parameters such as the radius to evaluate the correlation between the
voltages of the different modeling methods. The methodology addresses the use of virtual
test specimens, in using the plate model as a baseline with a convergence analysis of
tensions. The results evaluated the difference between the tensions obtained between the
different models proposing the use of a voltage increment factor Ki and demonstrate that
the solid element model is more conservative for the analysis of the maximum stress in
the central region (vertex) of a “C” channel beam, on the other hand, the plate model
proved to be more conservative for the analysis of stresses in the radius from the same
region. It is noted the relevance of the level of refinement and its relationship with
the computational cost associated with the numerical precision of the analyses. It is
highlighted the importance of the fidelity of the boundary conditions and application
conditions of the load to ensure accurate and reliable results. The Ki factor can be used
as tension correction between models once the problem is modeled according to previous
studies. Furthermore, suggestions for future work are highlighted, such as parameter
variation, local refinement, and boundary condition enhancement and load application.Trabalho de Conclusão de Curso (Graduação)Este trabalho apresenta um estudo acerca da análise de tensão em vigas de perfil “C”
utilizando modelos de elementos de placa e modelos de elementos sólidos. A pesquisa
realizada neste estudo tem relevância para o desenvolvimento de produtos na engenharia
aeronáutica, especialmente no que diz respeito à análise de tensão em vigas de perfil
“C” e sua aplicação em estruturas de aeronaves. Aborda-se a necessidade de soluções
baseadas em modelos globais compostos por elementos de placa e propõe-se a variação
de parâmetros como o raio para avaliação da correlação entre as tensões dos diferentes
métodos de modelagem. A metodologia aborda o uso de corpos de prova virtuais, em que
se usa o modelo de placas como baseline com uma análise de convergência de tensões.
Os resultados avaliaram a diferença entre as tensões obtidas entre os diferentes modelos
propondo a utilização de um fator de incremento de tensão Ki e demonstram que o modelo
de elementos sólidos é mais conservativo para a análise da tensão máxima na região central
(vértice) de uma viga perfil “C” e que o modelo de placas se mostrou mais conservativo
para a análise das tensões no raio da mesma região. Nota-se a relevância do nível de
refinamento e a sua relação com o custo computacional associado à precisão numérica das
análises. Destaca-se a importância da fidelidade das condições de contorno e das condições
de aplicação da carga para garantir resultados precisos e confiáveis. O fator Ki pode ser
utilizado como correção de tensão entre modelos uma vez que o problema esteja modelado
conforme estudos prévios. Além disso, são apontadas sugestões para trabalhos futuros,
como a variação de parâmetros, o refinamento local, e o aprimoramento das condições de
contorno e aplicação de carga
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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