1,722,777 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
Amniotic derived progenitor cells in different animal species in view of cell therapy applications
No full textAnti-inflammatory and immunomodulatory miRNA cargo of microvesicles obtained from equine amniotic progenitor cells in different time-span of in vitro culture
No full textMesenchymal stromal cells (MSCs) were found to secrete many factors with therapeutic relevance for their anti-oxidants, anti-apoptotic, anti-fibrotic, angiogenic, immunomodulatory and chemiotactic activities. The culture supernatant of MSCs (in our case namely of equine amniotic derived cells) is defined secretome or conditioned medium (CM) and it is composed of soluble and no soluble factors secreted by cells. Soluble factors are represented by cytokines and growth factors, while microvesicles (MVs), that it has recently been demonstrated to be an integral component of cell-to-cell communication during tissue regeneration, represent no soluble factors (Bruno et al., 2009 Journal of the American Society of Nephrology 20, 1053–1067). Our previous data showed that equine amniotic derived CM, administrated in vivo in equine spontaneous tendon lesion, is able to regenerate the injured tissue overlapping the results obtained by using in vivo the cells of origin in the same pathology (Lange-Consiglio et al., 2013 Stem Cells Development 22, 3015–3024). We also studied the amniotic derived MVs and we found that they are involved in downregulation of pro-inflammatory genes in in vitro LPS stressed equine tendon and endometrial cells (Lange-Consiglio et al,. 2016 Stem Cells Development 25, 610–621; Perrini et al,. 2016 Stem Cell Research and Therapy 7, 169). Usually, protocols to produce CM and MVs are different: CM can be collected after 12-96 hours of culturing cells without renewal of tissue culture medium, while MVs are usually collected culturing cells overnight. Future comparative study of regenerative medicine using CM and MVs will be difficult to interpret because there are not information about the quality of secretion of cells and the difference in micro-RNA cargo in MVs isolated after only 1 night of culture or isolated from CM that usually required a longer culture time. In this context, the aim of this relation is to comparatively report the miRNA content in AMCs and their MVs in two time points chosen between 1 night and 4 nights (the longer time of production of CM identified in literature and used in our previous studies) to evaluate the effect of different times of culture on quality of secretome. An enrichment of miRNAs, that have an important role in the immunity and anti-inflammatory response, is found both in cells and MVs at 4 nights of culture compared to 1 night. Simultaneously, an increase of MVs size due to the presence of apoptotic bodies is discovered. It will be interesting to isolate these apoptotic bodies in order to understand how their miRNA content is able to affect the miRNA library. In this way, it would be possible to give a more precise answer to the question if is better the secretoma of 1 night or 4 nights
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
