1,720,962 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
C5aR1
No full textC5aR1 is the lynchpin of communication between complement activation and the cellular immune response. It acts as a G-protein coupled receptor to attract and activate leucocytes in response to C5a. The genetic locus for C5aR1 consists of two exons separated by a large intron, a structure it shares with the other anaphylatoxin receptors. C5aR1, in humans, is produced as a single 350 amino acid chain. The receptor is widely expressed within myeloid cells, and there have been reports of intracellular lymphocyte expression. In addition, there have been several novel, nonimmune roles described for C5aR1 in the context of development
C5aR2
No full textThe second receptor for C5a is a new addition to the complement family since the first edition of this book. It was discovered in 2000 and, despite its relatively short history, its function has been the subject of controversy. The genetic locus for this receptor consists of two exons separated by a large intron, a structure it shares with C5aR1. C5aR2 in humans is produced as a single 337 amino acid chain. The receptor falls within the larger 7-transmembrane G-protein coupled receptor family and binding with C5a, its primary ligand, occurs with contribution from all extracellular domains of the receptor. On the intracellular domains, C5aR2 lacks the conserved residues necessary for G-protein coupling, yet is able to signal via arrestins, leading to speculation surrounding function
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
C3aR1
No full textC3aR binds the complement activation fragment, C3a. It is a G-protein coupled receptor of 482 amino acids, notable for its large second extracellular loop. As with the other closely related anaphylatoxin receptors, the genetic locus for this receptor consists of two exons separated by a large intron. The receptor is widely expressed, and in high levels on cells of the myeloid lineage. Previously, it has been grouped with C5aR1 as a proinflammatory mediator of the immune response; however, emerging research has shown that C3aR exhibits a modulatory function on immune cells dependent on cell type and environment
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