1,720,960 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
Blue, green, brown, or something in between – the science of eye colour explained
No full textYou’re introduced to someone and your attention catches on their eyes. They might be a rich, earthy brown, a pale blue, or the rare green that shifts with every flicker of light. Eyes have a way of holding us, of sparking recognition or curiosity before a single word is spoken. They are often the first thing we notice about someone, and sometimes the feature we remember most.Across the world, human eyes span a wide palette. Brown is by far the most common shade, especially in Africa and Asia, while blue is most often seen in northern and eastern Europe. Green is the rarest of all, found in only about 2% of the global population. Hazel eyes add even more diversity, often appearing to shift between green and brown depending on the light.So, what lies behind these differences
Development of a small molecule protocol for the differentiation of human pluripripotent stem cells (hPSCs) to photoreceptors
Get PDFPhotoreceptor (PhR) degeneration and death is the ultimate cause of permanent vision loss,common to all retinal degenerative disease (RDD). Millions of people worldwide are affected, with current therapies lacking long-term efficacy. Human pluripotent stem cells (hPSCs) provide a limitless source cell that can be used for differentiation of all retinal cell types. They offer potential for use in transplantation for a host of RDDs. However the development of protocols to provide efficient differentiation of hPSCs to PhRs in sufficient number of clinical grade cells, remains a challenge. This 66-day repeat study used PGP1, CRISPR/Cas9 transgenic reporter hiPSC line to optimise and repeat a protocol for directed differentiation of hiPSC to PhRs using small molecules. Preliminary results across six timepoints demonstrate the presence of cells expressing early PhR markers, along with transcription factors at relevant time points. Live cell images at D27 indicate activation of the mCherry-tagged RCVRN gene. Further immunocytochemistry supports the high expression of RCVRN at D31, and of CRX, PRDM1 and ARR by D52. This is followed by expression of OPSIN-M and ARRESTIN at D66. Flow cytometry data at D52 supports activation of mCherry-tagged RCVRN by 97.4% of culture positive for RCVRN expression. This repeated protocol demonstrates the potential to generate homogeneous populations of PhRs without the need for cell selection.This protocol can be refined to give a Good Manufacturing Practice (GMP) protocol for pre-clinical study
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
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
- …
