1,721,009 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
Abstracts of Theses in the Field of Elementary Education, Southwest Texas State Teachers College, 1943-1952
No full textNo abstract prepared.Curriculum and Instructio
A Survey of Municipal Recreation in San Antonio
No full textNo abstract prepared.Curriculum and Instructio
The phylogenetic placement of two enigmatic metazoan parasites: Polypodium hydriforme and Myxozoa
Get PDFThe species Polypodium hydriforme and the phylum Myxozoa are both intracellular fish parasites. Both parasites possess putative nematocysts, the stinging structure characteristic of all cnidarians. This morphological evidence has historically supported, with some contention, a placement of these taxa within Cnidaria. Yet, current molecular data, in the form of 18S rDNA, has challenged this placement. Repeated phylogenetic analyses of 18S rDNA data alone have revealed myxozoans and Polypodium to be long-branched taxa, often falling sister to one another other, but consistently grouping, with albeit weak support, as sister to Bilateria. In the following work I reevaluated the most complete available molecular data, augmenting it where possible, in an effort to drawn stronger conclusions with regards to the phylogenetic placement of these two enigmatic, parasitic, putative cnidarian taxa. Results of a more comprehensive taxon sampling of 18S rDNA support Polypodium as a cnidarian and myxozoans as sister to Bilateria. This suggests that previous 18S rDNA analyses of Polypodium suffered from artifacts of long-branch attraction. Molecular sequence variation discovered within Polypodium is also reported. Finally, rDNA and phylogenomic data, which support two competing molecular phylogenetic hypotheses for Myxozoa's classification, are revisited here. New analyses reveal significant conflict within phylogenomic data purported to support a cnidarian placement. Combined analyses of the most comprehensive rDNA and phylogenomic data available, weakly support the controversial placement of Myxozoa as sister to Bilateria. While this placement remains tentative, results suggest that phylogenomic studies with limited taxonomic sampling should be interpreted cautiously. Comprehensive sampling remains one of the best ways to over come artifactual placements of long-branched clades
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
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