1,720,985 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
Influência das características da plumagem do macho no investimento e sucesso reprodutivo em Sporophila lineola
No full textIn sexually dimorphic bird species, male’s plumage traits are used by females as criteria during mate choice. Female preference is related with plumage traits that is correlated with male quality. By choosing higher quality mates, females can gain direct and/or indirect benefits for their offspring. Once mate plumage traits can affect the offspring viability, it is expected that these traits also influence females' reproductive investment in a given breeding attempt. The differential allocation hypothesis predicts that females invest more in the breeding when paired with preferred males, since these provide better resources and/or genes. In contrast, the compensatory investment hypothesis predicts that females paired with non-preferred males may increase their investment to compensate the poor resources provided by them. We investigate these hypotheses in Lined Seedeaters Sporophila lineola, a socially monogamous songbird with a marked sexual dimorphism. Males have a black plumage with white patches evident on the head, malar region, wing and rump (black-and-white males), while females are brownish. Interestingly, cases of males breeding in female-like plumage (brownish males) are reported. Moreover, given that some aspects of mate choice and the process underlying this phenotypic variation in male’s breeding plumage coloration remain unclear for this species, we also gathered data to improve the knowledge about these topics. This work used breeding data from a seven-year long study of color-banded population in southeastern Brazil. In chapter 1, we describe male displays that suggest nesting sites to females, which could be a sexually selected behaviour in Lined Seedeaters. In chapter 2, we describe the delayed plumage maturation in this species, and we show that males in female-like plumage are formative individuals in their first breeding season. In chapter 3, we report that investment on eggs and offspring survival can be attributed to male plumage colour, and females mated with brownish males have a higher reproductive investment. In the chapter 4, our findings show that coronal stripe and malar patch of black-and-white males influence the female reproductive investment, with females laying smaller eggs when mated with males with larger coronal stripes and malar patches. In summary, we show that plumage traits may be important for revealing the quality differences among males in Lined Seedeaters, consequently affecting female’s reproductive investment and pair breeding performance.Em espécies de aves sexualmente dimórficas, as características da plumagem do macho podem ser usadas pelas fêmeas como critério durante a escolha do parceiro. A preferência da fêmea é direcionada a características que se correlacionam com a qualidade do macho. Escolhendo parceiros de melhor qualidade, as fêmeas podem obter benefícios diretos e/ou indiretos para sua prole. Uma vez que as características da plumagem do macho podem afetar a viabilidade da prole, espera-se que também influenciem o investimento reprodutivo das fêmeas em uma determinada tentativa reprodutiva. A hipótese de alocação diferencial prevê que as fêmeas invistam mais na reprodução quando pareadas com machos preferidos, pois estes fornecem melhores recursos e/ou genes. Em contrapartida, a hipótese do investimento compensatório prevê que as fêmeas pareadas com machos não preferidos podem aumentar seu investimento para compensar os escassos recursos fornecidos por eles. Aqui, investigamos essas hipóteses em Sporophila lineola, o bigodinho, uma ave socialmente monogâmica com marcado dimorfismo sexual. Os machos possuem uma plumagem preta com manchas brancas na cabeça, região malar, asa e uropígio (machos pretos e brancos), enquanto as fêmeas são pardas. Curiosamente, são relatados casos de machos reproduzindo em plumagem semelhante à da fêmea (machos pardos). Uma vez que alguns aspectos da escolha do parceiro e do processo responsável pela variação fenotípica na coloração da plumagem reprodutiva dos machos ainda são desconhecidos para a espécie, aqui reunimos dados que contribuem para o conhecimento sobre estes tópicos. O presente trabalho utiliza os dados reprodutivos de uma população de bigodinhos monitorada por sete anos no sudeste do Brasil. No capítulo 1, descrevemos exibições dos machos que indicam locais de nidificação para as fêmeas, o que pode ser um comportamento sexualmente selecionado. No capítulo 2, descrevemos o atraso na maturação da plumagem, e mostramos que machos com plumagem parda são indivíduos em plumagem formativa em sua primeira estação reprodutiva. No capítulo 3, relatamos que o volume dos ovos e as taxas de sobrevivência da prole estão relacionadas a coloração da plumagem dos machos, e que fêmeas pareadas com machos pardos investem mais na reprodução. No capítulo 4, demonstramos que a faixa coronal e a mancha malar dos machos em plumagem preta influenciam o investimento reprodutivo das fêmeas, de modo que fêmeas colocam ovos menores quando pareadas com machos com maior faixa coronal e maior mancha malar. Em resumo, as características da plumagem podem ser importantes para revelar as diferenças de qualidade entre machos, afetando consequentemente o investimento reprodutivo das fêmeas e o desempenho reprodutivo dos casais nos bigodinhos.CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior2025-08-2
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
The range of the curl‐crested jay: lessons for evaluating bird endemism in the South American Cerrado
No full textAuthor-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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