1,720,954 research outputs found
Dificuldades de aprendizagem em componentes curriculares da área de física em um curso de nível superior: estudo de caso
Get PDFAs dificuldades de aprendizagem são um problema em qualquer nível de ensino, inclusive no ensino superior, com isso toda a trajetória acadêmica pode sofrer com os efeitos dessa problemática. Nesse contexto, este artigo visa contribuir com os estudos referentes às dificuldades de aprendizagem no ensino superior, especificamente na área da física. O texto aborda a organização pedagógica do curso Interdisciplinar em Ciência e Tecnologia no âmbito da Universidade Federal Rural do Semi-Árido e elenca a questão da evasão escolar como uma das consequências que podem ocorrer quando não se tem ações para trabalhar as dificuldades de aprendizagem, relacionando a retenção com o referido tópico. A pesquisa bibliográfica realizada adotou uma abordagem exploratória e utilizou a metodologia de coleta de dados junto aos estudantes do curso por meio de formulário eletrônico, para, em seguida, realizar uma análise quantitativa dos resultados obtidos. Nas considerações apontou-se a didática utilizada e a base educacional em matemática como duas causas desse problema, o que corrobora com o referencial utilizado. Assim, concluiu-se ser imprescindível a compreensão acerca desta temática, de modo a se produzir inferências que levem a uma intervenção qualificada: a tutoria e a necessidade de consolidação de aprendizagens no Ensino Básico foram apontadas como possíveis soluções.14 f
Análise de argamassa com substituição parcial do agregado areia por eps e aditivo de melamina sulfonada
Get PDFA busca por materiais de construção mais eficientes e sustentáveis tem impulsionado inovações constantes no campo da engenharia civil. Uma abordagem promissora que vem ganhando destaque é a substituição parcial do agregado miúdo por poliestireno expandido (EPS) e adição de aditivos. Diante disso, o objetivo da pesquisa foi investigar como a substituição parcial do agregado por poliestireno expandido (EPS) e o acréscimo do aditivo Melamina Sulfonada influência a argamassa de revestimento. As argamassas foram produzidas com a substituição do agregado miúdo pelo pó de EPS, nas proporções de 0%, 15%, 30% e 45%, com o uso de um aditivo a base de Melamina Sulfonada em argamassas, em concentrações de 0% e 0,2% em relação ao peso do cimento. Foram realizados testes para caracterizar os agregados e analisar as propriedades das argamassas no estado fresco e endurecido. A adição de EPS e Melamina Sulfonada alterou as propriedades da argamassa, aumentando o consumo de cimento ao substituir o agregado miúdo por EPS e impactando os custos de produção. A Melamina Sulfonada melhorou a trabalhabilidade da argamassa, reduziu a relação água/cimento e diminuiu a densidade de massa no estado endurecido, facilitando sua aplicação. Além disso, atuou como redutor de evaporação, prolongando o tempo para a argamassa atingir estabilidade. Essa combinação mostrou potencial para melhorar eficiência, resistência, durabilidade e reduzir custos na construção civil, promovendo soluções mais sustentáveis.The search for more efficient and sustainable building materials has been driving constant innovations in the field of civil engineering. A promising approach that has been gaining prominence is the partial replacement of fine aggregate with expanded polystyrene (EPS) and the addition of additives. Therefore, the aim of the research was to investigate how the partial replacement of aggregate with expanded polystyrene (EPS) and the addition of the Melamine Sulfonate additive influence the rendering mortar. The mortars were produced with the replacement of the fine aggregate by EPS powder, in proportions of 0%, 15%, 30%, and 45%, using a Melamine Sulfonate-based plasticizing additive in proportions of 0% and 0.2% relative to the weight of cement. Tests included aggregate characterization, properties in the fresh state (consistency index and bulk density), and hardened state (bulk density and water loss due to evaporation). The addition of EPS and Melamine Sulfonate significantly influenced the mortar properties. Cement consumption increased with the replacement of fine aggregate with EPS, impacting production costs. The addition of Melamine Sulfonate reduced the water/cement ratio and improved the workability of the mortar. The bulk density in the hardened state decreased with Melamine Sulfonate, facilitating application. Moreover, Melamine Sulfonate acted as an evaporation reducer, prolonging the time required for the mortar to reach stability. The research shows that the combination of EPS and Melamine Sulfonate can result in mortars with enhanced properties in terms of efficiency, strength, durability, and production costs. This approach contributes to the development of more sustainable and effective solutions in civil construction.28 f
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
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