1,720,964 research outputs found
Relation between body mass, stature and VO2MAX with measures of physical performance in football athletes
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Previous issue date: 2015Introdução: A modalidade do futebol feminino tem apresentando grande adesão nos últimos anos, despertando assim o interesse de investigações sobre variáveis que podem predizer o desempenho, tais como, medidas antropométricas e testes físicos. Objetivo: O presente estudo investigou as possíveis associações entre massa corporal, estatura e VO2Max como o desempenho físico de atletas de futebol feminino. Matérias e Métodos: A amostra foi constituída por 18 atletas de futebol do sexo feminino, cujas características de idade 19,8 ± 1,4anos, altura 1,65 ± 0,4cm, massa corporal 59 ± 8kg. O desempenho físico foi avaliado através de testes físicos, sendo: sprints máximos de 10 e 30 metros, teste de Cooper de 12 minutos, teste de salto vertical e teste Illinois. Para testar possíveis associações entre a massa corporal, à estatura e o VO2Max com medidas de desempenho físico, foram empregados os testes de correlação de Pearson (r) e regressão linear simples (r2). Para todas as análises foi adotado o coeficiente de significância estatística p < 0,05. Resultados: Os dados apontaram relação apenas entre o VO2Max e o teste Illinois como significativa dentro das12 relações testadas, 10 delas foram negativas indicando pelo menos uma tendência de que, quanto maior a massa corporal e a estatura, menores os resultados nos testes de desempenho. Conclusão: De acordo com os resultados constatados, as medidas antropométricas mensuradas e as fracas correlações do VO2Max com os testes físicos, não apresentaram ser variáveis determinantes sobre o desempenho das atletas de futebolIntroduction: The women's football has established more attention at the last years, thus arousing the interest of research on variables that can predict the performance, such as anthropometric measures and physical tests. Objective: This study investigated the possible association between body mass, height and VO2Max as the physical performance of female football athletes. Materials and Methods: The sample consisted of 18 female soccer players, whose characteristics age 19.8 +/- 1.4 years old, height 1.65 +/- 0.4 cm, body mass 59 +/- 8 kg. Physical performance was evaluated through physical tests, as follows: maximum sprints of 10 and 30 meters, the Cooper test 12 minutes, Illinois test and vertical jump test. To test possible associations between body mass, height and VO2Max with measures of physical performance tests were used the Pearson correlation (r) and linear regression (r2). For all analyzes we used a coefficient of statistical significance p < 0.05. Results: The data showed only relationship between VO2Max and the Illinois as being significant relationships inside 12 tested, 10 of them were negative, indicating at least a tendency that how much higher the body mass and height, lower are results in performance testing. Conclusion: According to the results observed, the indicated anthropometric measurements and weak correlations of VO2Max with showed physical tests are not determining variables on the performance of soccer players.[da Silva, Jose Eduardo; Brito, Romulo Soler] Prefeitura Municipal Taubate, Sao Paulo, Brazil[Voltolini, Julio Cesar] Universidade de Taubaté (Unitau), Dept Biol, Sao Paulo, Brazi
Effect of the landscape on the presence and abundace of the brown howler Alouatta guariba clamitans in forest fragments of southeastern Brazil
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Previous issue date: 2017Este estudo avaliou a influência de métricas da paisagem na presença e abundância de Alouatta guariba clamitans, em 21 remanescentes de Mata Atlântica, em Taubaté, SP. Utilizando um levantamento extensivo, entre agosto de 2014 e julho de 2015, no qual foram percorridas trilhas, das 8:00 às 12:00 e das 13:00 às 17:00 hs, totalizando um esforço amostral de 672 horas. Para obter a presença/ausência da espécie, foram considerados registros diretos e indiretos. As métricas da paisagem foram analisadas no ArcGIS v.9.3. Quanto às análises estatísticas, utilizou-se a regressão logística múltipla e a regressão linear múltipla, ambas realizadas no BioEstat v.5.0. O bugio-ruivo esteve presente em 57,14% (n = 12) dos remanescentes. Foi encontrada associação positiva entre a presença deste primata e a área do fragmento (Chi² = 1,16; P = 0.00). Não foi obtida relação entre ocupação e distância média dos fragmentos do entorno (Chi² = 1.19; P = 0.31), nem entre ocupação e índice de forma (Chi² = 0.53; P = 0.37). Foi obtida associação negativa entre a área do fragmento e a abundância populacional (r² = -0.53; P = 0.03). Assim, a variável área foi a mais importante, demonstrando ser fundamental sua incorporação na elaboração de modelos preditivos da ocorrência do bugio-ruivo. Embora a hipótese da configuração metapopulacional precise ser melhor investigada, nossos resultados sugerem que a manutenção dos fragmentos pequenos e médios (4.1-35 ha) pode ser importante para a conservação da espécie na região.This study evaluated the influence of landscape’s metrics on the presence and abundance of Alouatta guariba clamitans in 21 Atlantic Rainforest fragments in Taubaté, Southeastern Brazil. Using broad surveys completed between August 2014 and July 2015, we walked trails in the forest from 8:00 to 12:00 and from 13:00 to 17:00 hs, totalizing 672 hours of observation. Both direct and indirect records were considered to confirm the presence of the species. Landscape metrics were analysed in ArcGIS v.9.3. Multiple logistic regression and multiple linear regression analyses were performed in BioEstat v.5.0. The brown howler monkey was present in 57.14% (n = 12) of the fragments. A positive association between the presence of this primate and the area of the fragment was detected (χ² = 1.16, P<0.01). Occupation was not associated to the average distance from the surrounding fragments (χ² = 1.19, P = 0.31) or to the shape index of the fragment (χ² = 0.53, P = 0.37). A negative association was observed between fragment area and howler population abundance (r² = -0.64, P = 0.02). Therefore, area was the most important explanatory variable and should be incorporated in the elaboration of predictive models of brown howler monkey occurrence. Although hypothesis of metapopulation configuration needs to be better investigated, our results suggest that the maintenance of small and medium fragments (4.1-35 ha) may be important for the conservation of the species in this region.[Voltolini, Julio Cesar] Universidade de Taubatéde Almeida e Silva, Anne Sophie] Universidade Federal de Santa Maria, BrasilBarbisan Fortes, Vanessa] Universidade Federal de Santa Maria, Brasi
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
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