1,720,961 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
The 3'-UTR C>T polymorphism of the oxidized LDL-receptor 1 (OLR1) gene does not associate with coronary artery disease in Italian CAD patients or with the severity of coronary disease
No full textBackground and aim: Oxidized low-density tipoproteins (OxLDLs) play a critical rote in endothetiat dysfunction, which is implicated in the pathogenesis of atherosclerosis. Vascular enclothelial cells internalize and degrade oxLDL through the endothelial lectin-like oxidized LDL receptor 1 (OLR1). OLR1 is up-regulated in several pathological conditions, including hypertension, hyperlipidernia, diabetes, atherosclerosis and inflammation, and represents therefore a good candidate for coronary artery disease (CAD). Recently, a 3'-UTR (188 C > T) SNP in the OLR1 gene has been reported to be associated with coronary artery stenosis and myocardial infarction. In the present study we investigated whether the OLRI gene 188 C > T SNP is a genetic risk marker for CAD in Italian patients with angiographically defined coronary atherosclerosis, and assessed its relation with clinical and metabolic abnormalities, including severity of disease (classified as restenosis, single- or multiple coronary vessels disease, and MI). Methods: The 3'-UTR C > T SNP was detected in real-time PCR in 351 subjects with CAD and in 215 control subjects. Results: The OLR1-T allele frequencies were 48.9% in the CAD subjects and 47.7% in controls, with no significant difference between the two groups. Also, the 3'-UTR C > T SNP did not associate with any of the parameters of severity of disease. Furthermore, none of the other clinical and metabolic parameters were associated with the OLR1 gene SNP. Conclusions: Our observations suggest that, in our population, the 3'-UTR C > T polymorphism of the OLR1 gene is unlikely to play a role in the pathogenesis of coronary artery disease. (c) 2005 Elsevier B.V. All rights reserved
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
Search for genetic variants of the SYNTAXIN 1A (STX1A) gene: the -352 A > T variant in the STX1A promoter associates with impaired glucose metabolism in an Italian obese population
No full textInt J Obes (Lond). 2008 Mar;32(3):413-20. Epub 2007 Oct 2. Search for genetic variants of the SYNTAXIN 1A (STX1A) gene: the -352 A>T variant in the STX1A promoter associates with impaired glucose metabolism in an Italian obese population. Romeo S, Sentinelli F, Cavallo MG, Leonetti F, Fallarino M, Mariotti S, Baroni MG. Source Department of Medical Sciences, Endocrinology and Metabolism, University of Cagliari, Cagliari, Italy. Abstract OBJECTIVE: To test if sequence variations of the SYNTAXIN 1A (STX1A) gene contribute to the susceptibility to type 2 diabetes in a cohort of overweight/obese subjects. METHODS: A total of 717 overweight/obese individuals underwent oral glucose tolerance test and were stratified in four groups according to fasting and 2 h glucose levels (NGT, IGT, CGI, T2DM), representing the natural history of diabetes from normal glucose tolerance to overt disease. These subjects were analysed by a two-step genetic study. Functional analysis was performed by electrophoretic mobility shift assay (EMSA) and by supershift with CCAAT/enhancer-binding protein (C/EBP)beta antibody. RESULTS: Among the several sequence variations detected in the STX1A gene, the T allele of the -352 A>T single nucleotide polymorphism in the promoter was found in a lower frequency in the subset of individuals with greater impairment of insulin secretion (CGI). To confirm that a lower frequency of the T allele was associated with this condition, we genotyped a second group of 202 overweight/obese individuals with type 2 diabetes, and the frequency of the T allele was reduced in this group also (PT variant in insulin secretion
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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