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Simpsonichthys de Carvalho
No full text[[Simpsonichthys de Carvalho]] Simpsonichthys de Carvalho is the most diversified genus of seasonal aplocheiloid killifishes, comprising 44 valid species (Costa, 2005, 2006). Species of Simpsonichthys occur over a vast neotropical area, including the Amazonas, Paraná-Paraguay, and São Francisco river basins of northeastern, central, and eastern South America, and in several other smaller coastal rivers basins (Costa, 2006). The greatest diversification is concentrated in the rio São Francisco basin, with 19 endemic species (Costa, 2005, 2006). Six species (S. trilineatus (Costa & Brasil, 1994); S. auratus Costa & Nielsen, 2000; S. similis Costa & Hellner, 1999; S. alternatus (Costa & Brasil, 1994); S. delucai Costa, 2003; and S. zonatus (Costa & Brasil, 1990)) are endemic to the rio Paracatu and rio Urucuia drainages, two adjacent drainages constituting the southwestern portion of the rio São Francisco basin. Among them, four species form two well corroborated clades (S. trilineatus and S. auratus, and S. alternatus and S. delucai), with all four hypothesized to be more closely related to species of Simpsonichthys endemic to the rio Tocantins basin than to congeners occurring in other parts of the rio São Francisco basin (Costa, 1996, 2003, 2006). Three new species belonging to these clades were collected by the second author in the middle rio Paracatu drainage, and are herein described.Published as part of Wilson J. E. M. Costa & Gilberto C. Brasil, 2006, Three new species of the seasonal killifish genus Simpsonichthys, subgenus Hypsolebias (Teleostei: Cyprinodontiformes: Rivulidae) from the rio Paracatu drainage, rio São Francisco basin, Brazil., pp. 41-55 in Zootaxa 1244 on page 4
Simpsonichthys
No full text[[Genus Simpsonichthys]] Simpsonichthys Carvalho is the most diverse genus of Neotropical annual killifishes, comprising 40 valid species, all inhabiting seasonal pools in central and northeastern South America. Monophyly of Simpsonichthys and intrageneric species assemblages have been defined in recent phylogenetic studies (e. g., Costa, 2003). Among these assemblages, the clade herein termed Simpsonichthys notatus species group comprises S. notatus (Costa & Brasil), from the upper Rio Tocantins basin, and S. stellatus (Costa & Brasil), S. rufus Costa & Nielsen, S. similis Costa & Hellner, S. trilineatus Costa & Brasil, S. auratus Costa & Nielsen, from the middle Rio São Francisco basin, and S. ocellatus Costa, Nielsen & De Luca, from the Rio Jequitinhonha basin. It is diagnosed by a unique frontal squamation pattern, in which the A-scale has all margins free (Costa, 2003). A new species of this clade, collected in a temporary pool associated to the headwaters of the Rio Crixás, upper Rio Tocantins basin, central Brazil, is described.Published as part of Wilson J. E. M. Costa & Gilberto C. Brasil, 2004, Simpsonichthys radiosus sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): a new annual killifish from the upper Rio Tocantins basin, central Brazil., pp. 1-7 in Zootaxa 737 on page
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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