1,720,954 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
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
Simulation of a packed absorber for recovering propanone from air
No full textThe process of separating certain components is one of the most important operations in the chemical
industry. Absorption columns are used in various unit operations to separate compounds to specify
and market them, thus playing a fundamental role in the purification and concentration of chemical
substances. The problem related to this equipment is associated with erroneous handling and
unfamiliarity with computer modeling, especially from an industrial point of view, which leads to
high operating, energy, and raw material costs, as well as affecting product quality, emitting pollutants
into the atmosphere, and compromising the plant's operational safety. Therefore, this study focuses
on a gas absorption column 1 m high and 0.07 m in diameter, with a glass Raschig ring filling, where
water was used as a solvent to remove the volatile organic compound (acetone or propanone) present
in the air. That said, to achieve more economical and efficient separations, this work aimed to simulate
this column in particular, using the Aspen Plus® software as a tool, evaluating not only the influence
of operational variables on transport phenomena but also on hydrodynamic behavior. The simulation
was validated with experimental data obtained in the laboratory by Barbosa and Góis (2024), for the
pressure drop, the fraction of acetone absorbed, and the volumetric mass transfer coefficient (KL.a).
In conclusion, from the simulated results obtained by the hydrodynamic study together with the mass
transfer, it was possible to validate the empirical data already collected in the column, regarding the
pressure drop, for the air-acetone-water system with Raschig rings, using the Sherwood-Leva-Eckert
(SLE) modeling, which showed an average deviation of 20%. In addition, the volumetric mass
transfer coefficient (KL.a) was validated for a gas flow rate of 0.85 g/min, based on Bravo-Fair rate
based modeling. For the other phenomena, the Bravo-Fair rate-based model proved to be the most
suitable for the study, showing that an increase in gas flow is associated with a greater pressure drop,
an increase in the probability of flooding, an increase in the fraction of acetone absorbed, in the
interfacial mass transfer area and a better fit of the model about the experimental KL.a. Thus, the study
provided reliability in analyzing the phenomena, as well as proposing improvements and
substantiating topics that have not yet been studied experimentally in the column, thus facilitating
future studies.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)O processo de separação de determinados componentes representa uma das operações mais
importantes na indústria química. As colunas de absorção são utilizadas em diversas operações
unitárias na separação de compostos visando sua especificação e comercialização, desempenhando
assim, um papel fundamental na purificação e concentração de substâncias químicas. A problemática
relacionada a este equipamento está associada à manipulação de forma errônea e à não familiarização
com a modelagem computacional, principalmente do ponto de vista industrial, o que acarreta altos
custos operacionais, energéticos e de matérias-primas, além de afetar a qualidade dos produtos, emitir
poluentes para a atmosfera e comprometer a segurança operacional da planta. Assim, o presente
estudo tem enfoque em uma coluna de absorção gasosa de 1 m de altura e 0,07 m de diâmetro, com
recheio do tipo anéis de Raschig de vidro, onde se utilizou a água como solvente para remoção do
composto orgânico volátil (acetona ou propanona) presente no ar. Posto isso, para alcançar separações
mais econômicas e eficientes, o intuito desse trabalho foi o de simular esta coluna em especial,
utilizando como ferramenta o software Aspen Plus®, avaliando não só a influência de variáveis
operacionais nos fenômenos de transporte como também no comportamento hidrodinâmico. A
simulação foi validada com os dados experimentais obtidos em laboratório por Barbosa e Góis (2024),
para a queda de pressão, a fração de acetona absorvida e o coeficiente volumétrico de transferência
de massa (KL.a). Em conclusão, a partir dos resultados simulados obtidos pelo estudo hidrodinâmico
juntamente com a transferência de massa, foi possível validar os dados empíricos já obtidos na coluna,
referentes à queda de pressão, para o sistema ar-acetona-água com anéis de Raschig, utilizando a
modelagem de Sherwood-Leva-Eckert (SLE), que apresentou um desvio médio de 20%.
Adicionalmente, validou-se o coeficiente volumétrico de transferência de massa (KL.a) para a vazão
de gás de 0,85 g/min, com base na modelagem rate-based de Bravo-Fair. Para os demais fenômenos,
o modelo rate-based de Bravo-Fair mostrou-se o mais adequado para o estudo, evidenciando que o
aumento da vazão de gás está associado a uma maior queda de pressão, a uma elevação na
probabilidade de inundação, a um acréscimo na fração de acetona absorvida, na área interfacial de
transferência de massa e a um melhor ajuste do modelo em relação ao KL.a experimental. Assim, o
estudo deu confiabilidade em analisar os fenômenos, além de propor melhorias e fundamentar tópicos
que ainda não foram estudados experimentalmente na coluna, facilitando assim estudos futuros
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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