1,721,520 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
Obesidade e asma: associação ou epifenômeno?
No full textOBJETIVO: Avaliar a associação entre obesidade e asma pela comparação entre idade, gênero, classificação inicial e controle da asma, valores de volume expiratório forçado no primeiro segundo (VEF1) e fluxo expiratório forçado entre 25 e 75% (FEF25-75%) basais com os índices de massa corpórea (IMC) em adolescentes asmáticos. MÉTODOS: Estudo transversal envolvendo 120 pacientes (1,9 masculino:1 feminino) asmáticos com mediana de idade de 14,1 anos (9 a 20,1 anos), classificados quanto ao controle e gravidade da asma e avaliados pela espirometria utilizando VEF1 e FEF25-75% basais. Esses dados foram descritos pela frequência, médias e desvio padrão ou medianas e variação, sendo analisados pelos testes de ANOVA, teste t não pareado, teste exato de Fisher, Kruskal-Wallis e pela correlação de Pearson, considerando-se significante p<0,05. RESULTADOS: Não houve diferença entre os gêneros em relação à classificação inicial da asma e ao nível de controle. Receberam classificação inicial persistente 91,7% (100 casos), sendo que 106 casos (88,3%) encontravam-se parcial ou totalmente controlados. Não houve diferença estatística entre os pacientes controlados e os demais em relação ao IMC. Não foram encontradas correlações significantes entre zIMC e VEF1 e entre zIMC e FEV25-75%, analisando-se todos os pacientes e apenas pacientes com sobrepeso ou obesos. CONCLUSÕES: Neste estudo, não foi encontrada correlação significante entre sobrepeso/obesidade e asma, utilizando-se parâmetros clínicos, antropométricos e espirométricos
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
Rinite alérgica e asma: coexistência e influência do ambiente domiciliar
No full textRinite alérgica e asma são reações de hipersensibilidade tipo I mediadas por IgE a substâncias estranhas. Estas doenças são muito prevalentes e a asma pode levar ao óbito, fatos que as tornam onerosas à saúde pública. São influenciadas por fatores genéticos, prénatais e ambientais. Este trabalho de revisão objetivou analisar a influência domiciliar da predisposição genética e da diferença de gênero no desenvolvimento da rinite alérgica e da asma e também averiguar a coexistência destas duas doenças
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
Sinusite e asma
Get PDFThe association between sinusitis and asthma has been studied for many years. It is well known that sinusitis and asthma coexist in many patients. Moreover, sinus disease seems to be an aggravating factor for asthma, and several authors relate control of asthma with the effective treatment of concomitant sinusitis. However, thus far, the cause-and-effect relationship remains unclear. Many theories have been proposed to explain this association, mainly the nasal-sinusbronchial reflex, the pharyngeal aspiration, and the activation of inflammatory mediators. The objective of this article is to review the most important theories that correlate sinus disease and asthma, and to analyze the existence of a link between these entities.A associação entre sinusite e asma tem sido estudada por muitos anos. Sabe-se que a sinusite e a asma coexistem em muitos pacientes. Além disso, a afecção dosseios da face parece ser um fator agravante para a asma e diversos autores relataram um melhor controle das crises de asma quando uma sinusite concomitante foiefetivamente tratada. Entretanto, até o momento, a relação causa-efeito permanece incerta. Muitas teorias têm sido propostas para explicar esta associação,principalmente o reflexo naso-sinuoso-brônquico, a aspiração faríngea e a ativação de mediadores inflamatórios. O objetivo deste artigo é revisar as principais teorias que correlacionam as doenças dos seios paranasais à asma, analisando a existência de um vínculo entre estas duas entidades
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