1,721,139 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
Genome-wide analysis of copy number changes and loss of heterozygosity in myelodysplastic syndrome with del(5q) using high-density single nucleotide polymorphism arrays.
No full textBACKGROUND: We undertook a genome wide single nucleotide polymorphism analysis of a spectrum of patients with myelodysplastic syndrome del(5q) in order to investigate whether additional genomic abnormalities occur. Single nucleotide polymorphism array analysis has been shown to detect not only gene deletions but also regions of uniparental disomy that can pinpoint particular regions for mutation analysis. DESIGN AND METHODS: We studied 42 cases of myelodysplastic syndrome with del(5q), comprising 21 patients with 5q- syndrome and 21 with del(5q) (not 5q- syndrome), and 45 healthy controls by genome wide single nucleotide polymorphism analysis with the 50K Affymetrix single nucleotide polymorphism arrays. RESULTS: The del(5q) was characterized in all cases. The commonly deleted region of the 5q- syndrome extends between the genes SH3TC2 (proximal boundary) and GLRA1 (distal boundary) and measures 2.9 Mb. Copy number changes in addition to the del(5q) were observed in 10 of 21 patients with del(5q) myelodysplastic syndrome but in none of the patients with the 5q- syndrome. A total of 63 regions of uniparental disomy greater than 2 Mb were detected in 40 of 42 patients, dispersed on 18/23 chromosomes. In the 5q- syndrome group 31 regions of uniparental disomy were identified in 19 of 21 patients, the largest one being 7.6 Mb. All 21 patients with del(5q) myelodysplastic syndrome had uniparental disomy; in total 32 regions of uniparental disomy were identified in the 21 patients, including six regions of uniparental disomy > 10 Mb. Eight recurrent regions of uniparental disomy were observed among the 42 patients. For eight patients we had T-cell DNA as a germline control and four recurrent regions of uniparental disomy were identified that were present only in the neutrophil and not T-cell DNA. One small region of uniparental disomy at 10p12.31-p12.2 was observed in four patients with the 5q- syndrome. CONCLUSIONS: This study shows that regions of uniparental disomy greater than 2 Mb are found in the 5q-syndrome and del(5q) myelodysplastic syndrome, although large regions of uniparental disomy (>10 Mb) are only found in the latter group. The recurrent regions of uniparental disomy may indicate the position of novel leukemia-associated genes
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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