1,720,971 research outputs found
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
Clean-in-Place system identification
No full textOrientadores: Flávio Vasconcelos da Silva, Rubens GedraiteDissertação (mestrado) - Universidade Estaual de Campinas, Faculdade de Engenharia QuímicaResumo: A presença de resíduos em superfícies mal higienizadas pode aumentar a incidência de microrganismos e ocasionar problemas operacionais nos equipamentos de processo. A identificação da dinâmica do processo pode contribuir para a melhoria da sua eficiência, racionalizando o uso de água e energia empregada nas operações de enxágue. Atualmente, a maioria dos processos de limpeza CIP é conduzida com base em procedimentos padronizados considerando a experiência dos operadores de processo no que tange ao tempo de funcionamento do ciclo. Este trabalho aborda, em um primeiro momento, a implantação da instrumentação e do sistema de controle necessários para monitorar e controlar o processo e, na sequência, o levantamento experimental do comportamento do sistema a estímulos na vazão e/ou temperatura de operação do processo. Para tal foi utilizado um trocador de calor instalado em planta piloto com o objetivo de relacionar, ao longo do tempo, a variação da alcalinidade (pH) da água empregada para remoção do detergente alcalino utilizado no processo de limpeza com a temperatura e vazão da mesma. Neste trabalho a planta utilizada possui dimensões de uma planta semi-industrial típica; tal característica possibilita que se considerem as dinâmicas e fenômenos encontrados em plantas reais, obtendo-se resultados de grande interesse prático. Os equipamentos utilizados (sensores, interfaces e atuadores) são padrão de mercado, adequadamente combinados e instalados de maneira a permitir o estudo de vários aspectos relacionados às etapas de um processo CIP. Testes foram realizados na planta partindo dos parâmetros de sintonia calculados pelo método ITAE por Rovira para o controle de vazão do fluido de processo. Os valores finais dos parâmetros PID que apresentaram o melhor resultado e foram utilizados na planta foram: Kp= 2,68 e Ti= 0,101 s. Devido à diferença na dinâmica para aumento e redução da temperatura para o controle de temperatura do fluido de processo, partiu-se dos parâmetros de sintonia calculados pelo Método CHR sem sobre valor. Os valores finais dos parâmetros PID que apresentaram o melhor resultado nos testes e foram utilizados na planta foram: para o aumento da temperatura Kp = 6,394, Ti = 3,640 s e Td=0,621 s, e para a diminuição da temperatura, foi utilizado o controlador proporcional com o parâmetro Kp = 0,08. A cinética da remoção foi avaliada a partir da variação do pH medido. Foram identificadas as dinâmicas da planta para diferentes condições operacionais que mostram que os parâmetros dinâmicos do sistema são fortemente influenciados pelas vazões e pouco afetados pelas temperaturas utilizadas, com maior contribuição para valores mais elevados de vazão (16 L.min-1), onde há menor consumo de água. Apesar de a identificação aproximada apresentar um modelo (com erro) que representa a resposta do processo, motivou-se o uso de uma metodologia de identificação mais refinada com o objetivo de comparação. Esta foi obtida através de modelos baseados no sistema de Inferência Fuzzy Neuro-Adaptativo (ANFIS) através do aplicativo Simulink/MATLAB'MARCA REGISTRADA'. Os resultados obtidos com os modelos foram validados por comparação com os dados experimentais. Para este processo duas entradas (a saída atrasada em uma amostragem - pH [k-1] - e a vazão atual - F[k]) e uma saída (o pH atual - pH[k]) para o treinamento da rede, mostraram ser mais adequadas para modelar a resposta da dinâmica do pH na etapa de enxague estudada. O erro médio foi de 0,011 quando comparados os dados experimentais coletados com o modelo obtido (tanto com o uso do algoritmo Grid partition quanto com o algoritmo Subtractive Clustering e com o uso de 3 ou 5 funções de pertinência do tipo triangular)Abstract: The presence of residues in poorly cleaned surfaces may increase the micro-organisms incidence and cause operational problems in process equipments. The process dynamics identification can contribute to improve efficiency, rationalizing the energy and water used in rinsing operations. Nowadays, most of CIP cleaning process is conducted based on standard procedures considering the process operators' experience regarding the operating time cycle. This paper discusses, at first, the instrumentation and control system implementation required to monitor and control the process and, after that, the experimental tests to analyze the system behavior to stimuli in flow and/or process operating temperature. For that it was used a heat exchanger installed in a pilot plant in order to relate, over time, the water alkalinity (pH) variation used to remove alkaline detergent used in the cleaning process with the temperature and flow rate of the same. The plant used in this study has the typical dimensions of a semi-industrial plant; this characteristic makes it possible to consider the dynamic and phenomena found in real plants, obtaining results of great practical interest. It was used industry standard equipments (sensors, actuators and interfaces) properly combined and installed so as to allow the study of various aspects related to the CIP process stages. Tests were done in the plant starting with the tuning parameters calculated by the ITAE by Rovira method to control the process fluid flow. The final PID parameters values that presented the best results and were used in the plant were: Kp = 2.68 and Ti = 0.101 s. Due to the difference in dynamics for increasing and decreasing temperature to control the process fluid temperature, It was started from the tuning parameters calculated by the CHR method without over value. The final PID parameter values that had the best results in the plant and were used were: for the temperature increase Kp = 6,394, Ti = 3,640 s and Td=0,621 s, and for decreasing temperature it was used a proportional controller with the parameter Kp = 0.08. The kinetics removal was evaluated starting from the measured pH variation. The plant dynamics were identified for different operating conditions which shows that the system's dynamic parameters are strongly influenced by the flow and little affected by the temperatures used, with a greater contribution for higher flow levels (16 L.min-1), where there is less water consumption. Although the approximate identification provide a suitable model (with error) that represents the process response, there was a motivation for the use of a more refined identification methodology with the objective of comparing. It was obtained by Adaptive Neuro-Fuzzy Inference System (ANFIS) model-based via Simulink/MATLAB'TRADE MARK' software. The results obtained with those models were validated by comparison with the experimental data. For this process two inputs (the output delayed by one sample - pH [k-1] - and the current flow - F[k]) and one output (the current pH - pH [k]) to the network training, revealed to be more appropriate to model the pH dynamics response in the rinse step studied. The average error was 0,011 when comparing the experimental collected data with the obtained model (either using the Grid Partition algorithm and the Subtractive Clustering algorithm and using 3 or 5 triangular membership functions)MestradoSistemas de Processos Quimicos e InformaticaMestre em Engenharia Químic
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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