1,720,997 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
Nitric oxide and enteric glia in the regulation of intestinal ion transport in health and disease
No full textBackground & Aims: Enteric glia are increasingly recognized as an important
functional component of the enteric nervous system. They have been indirectly implicated in the regulation of epithelial ion transport, which regulates homeostatic water and ion balance, through the release of the gaseous neurotransmitter nitric oxide, which has multifaceted roles in the physiological regulation and pathophysiological dysregulation of ion transport. However, the roles of enteric glia and nitric oxide in the regulation of ion transport are poorly understood in health and disease. Using nitric oxide synthase inhibition and a model of glial metabolic inhibition, the primary aims of this work were to investigate the physiological regulation of epithelial ion transport by nitric oxide and enteric glia, and how this regulation is altered during intestinal inflammation. Methods: Ion transport was measuring using full-thickness segments of mouse colon in an Ussing chamber apparatus. The release of nitric oxide from enteric glia and neurons within the myenteric plexus was assessed using amperometry and the cellular sites of nitric oxide release were investigated using nitric oxide imaging. Results: Under physiological conditions, nitric oxide release from enteric glia and neurons within the myenteric plexus regulates the nicotinically-mediated biphasic stimulation of epithelial ion transport in a concentration-dependent manner, while nitric oxide and enteric glia are not involved in the regulation of electrically-evoked stimulation of ion transport. Following intestinal inflammation, ion transport is hyporesponsive to stimulation, as the biphasic nicotinic response is reduced, and the response to electrically-evoked stimulation is absent. The inhibition of nitric oxide synthase or
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the metabolic inhibition of enteric glia further inhibits the nicotically-mediated response, and restores the electrically-evoked secretory response. Conclusions: This work demonstrates novel functional roles for nitric oxide released from enteric glia in the nicotinically-mediated physiological regulation and electrically-evoked pathophysiological dysregulation of intestinal ion transport. Additionally, a previously unappreciated role for the myenteric plexus in the regulation of nicotinically-mediated ion transport under physiological conditions is described. The data presented in this thesis highlight and extend the important roles of nitric oxide and enteric glia within the myenteric plexus in gastrointestinal health and disease.indefinit
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 effects of inflammation on the proportions of neuronal subtypes in the guinea pig ileum
No full textBibliography: p. 131-147
The response of the central nervous system to experimental colitis
No full textBibliography: p. 113-13
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