1,720,960 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
Tolerância térmica comportamental: implicações para a ecologia e conservação de anfíbios e répteis
No full textEctothermic animals depend on the environmental conditions in their habitat (eg temperature) to carry and maintain their physiological functions. Due to current global warming and the high diversity in the Neotropics endangered by rising temperatures, the understanding of its thermal ecology, along with aspects of its life history and phylogenetic relationships are necessary for its conservation. In this thesis I experimentally estimated the behavioral thermal tolerances of 67 species of Neotropical amphibians and reptiles. Additionally, I explored how these are related in different ecological, physiological and macroevolutionary aspects. In Chapter 1 I validated the experimental method for estimating behavioral thermal tolerances in snakes and investigated whether captive conditions affect these thermal tolerances in pitvipers. In Chapter 2, I investigated whether behavioral thermal tolerances help to explain distribution patterns and some aspects of the natural history of Neotropical frogs. In Chapter 3, I used a macroevolutionary approach to explore the relationship between tolerances and environmental characteristics in a monophyletic group of Neotropical pitvipers. Finally, in Chapter 4, I estimated and compiled a database of voluntary thermal tolerances from 53 species of amphibians and reptiles to provide a baseline for understanding the thermal tolerances of ectothermic vertebrates. The chapters were specifically designed and executed to describe, in a broad perspective, the implications of thermal tolerances on the ecology, evolution and life history of Neotropical ectotherms. The results of each chapter present important points for the understanding, interpretation and use of thermal tolerances in ecological, physiological and phylogenetic studies. This should result in a more complete approach and a more general understanding of both behavioral and physiological requirements and strategies, as well as the creation of more realistic scenarios of climate change in ectothermic vertebrates.Animais ectotérmicos dependem das condições ambientais no seu habitat (por exemplo, temperatura) para levar e manter as suas funções fisiológicas. Devido ao aquecimento global atual e a alta diversidade no Neotrópico em perigo pelo aumento das temperaturas, faz com que o entendimento da sua ecologia térmica, junto com aspectos da sua história de vida e relações filogenéticas sejam necessárias para a sua conservação. Nesta tese eu estimei experimentalmente as tolerâncias térmicas comportamentais de 67 espécies de anfíbios e répteis Neotropicais. Adicionalmente explorei como estas se relacionam em diversos aspectos ecológicos, fisiológicos e macroevolutivos. No capitulo 1 eu validei o método experimental para estimar tolerâncias térmicas comportamentais em serpentes e investiguei se condições de cativeiro afetam essas tolerâncias térmicas em jararacas. No capitulo 2, investiguei se tolerâncias térmicas comportamentais ajudam a explicar os padrões de distribuição e alguns aspectos de história natural de sapos Neotropicais. No capitulo 3, usei uma abordagem macroevolutiva para explorar a relação entre as tolerâncias e características ambientais em um grupo monofilético de Jararacas Neotropicais. Por fim, no capitulo 4, eu estimei e compilei um banco de dados de tolerâncias térmicas voluntarias de 53 espécies de anfíbios e répteis para fornecer uma linha de base para a compreensão das tolerâncias térmicas dos vertebrados ectotérmicos. Os capítulos foram especificamente pensados e executados para descrever, em uma perspectiva ampla, as implicações das tolerâncias térmicas na ecologia, evolução e história de vida de ectotermos Neotropicais. Os resultados de cada capítulo apresentam pontos importantes para o entendimento, interpretação e uso das tolerâncias térmicas em estudos ecológicos, fisiológicos e filogenéticos. Isso deve resultar em uma abordagem mais completa e em um entendimento mais geral sobre os requerimentos e estratégias tanto comportamentais quanto fisiológicas, assim como a criação de cenários mais realistas das mudanças climáticas nos vertebrados ectotérmicos
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
Supporting Information_Diaz-Ricaurte et al_Predation_Spilotes
No full text<p>Supplementary videos of the paper "<strong>Diet of the Neotropical snake genus <em>Spilotes</em> Linnaeus, 1758 (Squamata: Colubridae): A review, including two new records involving birds and a description of their anti-predator responses" .</strong></p>
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
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