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
Glial Orchestrated Neurodegeneration: An Important Crossroad for Neural Stem Cell Therapy to the Intestine
No full textDispelling 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
Effects of Short-Chain Fatty Acids Propionate, Acetate, Butyrate on the Growth of Clostridium difficile in Co-culture with an Escherichia coli atoE Mutant
No full textThere are three major short-chain fatty acids (SCFAs) that play a role in gastrointestinal health: propionate, butyrate, and acetate. SCFAs have probiotic effects that lead to a healthy gastrointestinal environment such as providing energy, maintaining the epithelial lining, and roles in gene regulation and immunity. There is evidence that SCFAs function as important cell signals that affect the metabolism and overall physiology of the gastrointestinal tract. While SCFAs have been shown to reduce the amount of inflammation in association with GIT diseases, they also have been known to affect metabolic signaling processes and immunity. Determining which species of SCFAs are present could help us better understand their roles in the gut microbiome, metabolism, and cellular signaling propagation. High fiber diets and dietary supplementation of commensal strains such as Lactobacillus and Bifidobacterium have been shown to increase the amounts of SCFAs in the gastrointestinal tract. Clostridium difficile (C. diff) is a gram-positive, spore-forming, bacillus-shaped anaerobe. C. diff, normally a minor component of the gastrointestinal flora, is resistant to most broad-spectrum antibiotics. Dystopia of the normal flora, caused by antibiotic treatment for unrelated infections, causes an overgrowth of C. diff. In recent years there has been an increased number cases of C. diff infection (CDI) and antibiotic-associated diarrhea (AAD). The antibiotic-induced disruption in the natural gastrointestinal flora diminishes our own microbiome-mediated colonization resistance, allowing C. diff to proliferate, sporulate and produce toxins. This study aimed to examine if SCFAs play a role in the initial onset and growth of C. diff in a broth culture. Upon examining each of the three major SCFAs singly and in combination (1 uM/SCFA concentration), no major effect on the growth of C. diff was observed. Using spent media from BW25113 (WT) and BW25113 (atoE, SCFA mutant), C. diff showed a trend toward less growth and delayed onset of exponential growth as the concentration of spent media went up. Using mM concentrations in a 3:1:1 ratio of acetate, propionate, and butyrate respectively will mimic the human gastrointestinal tract more efficiently, and may have more of an effect on the growth of C. diff. It is suggested to try 30mM for acetate, and 10mM for propionate and butyrate.Biolog
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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