1,720,973 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
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
1H NMR-based metabolomics on human mature milk reveals the effects of oral VLS#3 probiotic supplementation to mothers
No full textBackground Perinatal manipulation of maternal gut microflora has been recently proposed as a possible dietary strategy to reduce the risk of disease in the infant. However, how a modulation of gut microbiota can affect the host physiology, the breast milk composition, and finally the infant physiology is still unclear. We applied a metabolomics approach, based on 1H NMR spectroscopy and multivariate analysis, to characterize the mature breast milk metabolome. Furthermore, we evaluated the feasibility of revealing the changes in breast milk composition induced by oral VLS#3 probiotic mixture supplementation. Methodology Pregnant women have been administered perinatally with either oral VLS#3 or placebo. Breast milk was drawn one month after delivery, extracted into polar and organic phases and analysed by 1H NMR spectroscopy. The metabolic profiles were defined by applying statistical multivariate methods on the collected spectra. Immunological assays were performed on the same milk samples to determine the interleukin levels. Principal findings 1H NMR spectra allowed to classify the milk samples on the basis of Lewis epitopes. VLS#3 supplementation to mothers induced a different milk metabolome characterized by a significant decrease in the levels of some fucosyl-oligosaccharides and citrate levels, and an increase in MUFA, phosphatidylglycerols, and succinate levels. Milks from probiotic supplemented mothers showed a significant increase in TGF- and IL-10 levels. Conclusions 1H-NMR-based global metabolic profiling is a powerful analytical approach to investigate the subtle changes on human milk induced by a diet intervention. Our results can have important implications to understand how the modulation of mother gut microbiota affects the breast milk composition, and thence the infant health
Alginate beads as immobilization matrix for hepatocytes perfused in bioreactor
No full textBecause of their peculiar physico-chemical properties, alginate beads have often been proposed as an alternative cell immobilization matrix for many biotechnological applications. For entrapped hepatocytes perfused in a bioreactor, alginate beads have been demonstrated to promote viability and three-dimensional cell organization. In order to optimise the hepatocyte cell culture, we investigated the relationship between alginate beads properties, at high and low content of guluronic acid (G), and the relative cell viability and reorganization when perfused in a bioreactor. The primary structure of alginates did not apparently influence the hepatocytes culture in 8 h of perfusion in a bioreactor. However, our results confirm a preference for beads with a high content of G due to their superior mechanical resistance
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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