1,721,004 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
Systematic, biogeographic and microhabitat-based morphometric variation of the bivalve Anomalocardia squamosa (Bivalvia: Veneridae: Chioninae) in Thailand
Get PDFThe venerid genus Anomalocardia is tropical American in origin, yet has a distribution spanning the tropical western Atlantic to western Pacifi c oceans. This distribution makes it the most widespread genus of the monophyletic, tropical American Chioninae. Other tropical American chionine genera have either remained restricted to American waters since their originations at various times during the early Neogene, or have sparse fossil or relict Recent distributions in the northwestern Pacifi c. This is in spite of tremendous diversifi cation throughout Atlantic and Pacifi c American waters. Here we analyze the morphologic variation of A. squamosa (Linneaus, 1758) from Thailand, focusing specifi cally on the correspondence between morphological variability and microhabitat variation, with the eventual goal of uncovering possible adaptive advantages of Anomalocardia relative to other chionine genera. Signifi cant variation was found among sites, characterized by differences in the shape of valve commissures and siphonal regions. The variation corresponds qualitatively with differences in sediment and water energy. We further compare A. squamosa to the congeneric, western Atlantic A. brasiliana (Gmelin, 1791), and the related eastern Pacifi c species, Iliochione subrugosa (Wood, 1828), establishing A. squamosa as a geographically widespread species, and fi nding all the taxa to be morphologically distinct. Finally, the analysis of A. brasiliana reveals that individuals from the Caribbean are morphologically distinct from Brazilian individuals.Fil: Roopnarine, Peter D.. California Academy of Sciences. Department of Invertebrate Zoology and Geology; Estados UnidosFil: Signorelli, Javier Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Laumer, Christopher. Lawrence University. Department of Biology; Estados Unido
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
Isotopic Composition of Crassostrea Virginica Shells as Indicator of the Effects of the Deepwater Horizon Oil Spill
No full textv, 29p.Through sclerochronological methods, this study examined the effects of the Deepwater Horizon oil spill on C. virginica specimens. Oysters are principal benthic filter feeders that effectively bioaccumulate substances, making them ideal organisms for this study. Stable carbon and oxygen isotope data of modern Gulf of Mexico specimens, a historic Gulf of Mexico specimen, and a specimen collected from Chesapeake Bay were compared. Increasingly negative 8I3C values for the spill-affected specimen samples indicate the addition of organic carbon into the food web, temporally correlating to the Deepwater Horizon event
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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