1,721,031 research outputs found
Incidence and short-term prognosis of late sustained ventricular tachycardia after myocardial infarction. Results from GISSI-3 database
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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
Incidence and short-term prognosis of late sustained ventricular tachycardia after myocardial infarction: Results of the Gruppo Italiano per lo Studio della Sopravvivenza nell'Infarto Miocardico (GISSI-3) Data base
No full textBackground There is little epidemiologic information from large multicenter databases on sustained monomorphic ventricular tachycardia occurring after the initial 48 hours of myocardial infarction. Methods We reassessed its incidence and short-term prognosis in 16,842 patients with a definite myocardial infarction enrolled in the Gruppo Italiano per lo Studio della Soprovvivenza nell'Infarto Miocardico (GISSI-3) trial. Results The incidence rate of late sustained ventricular tachycardia by 6 weeks was around 1%. Older age, a history of hypertension, diabetes, and myocardial infarction, nonadministration of lytic therapy, Killip class >1, greater than or equal to6 leads with ST-segment elevation, higher heart rate, and bundle branch block on admission were significantly more frequent among patients with than without late sustained ventricular tachycardia. Patients with ventricular tachycardia had a more complicated course in-hospital and posthospital to 6 weeks than the reference group did. The arrhythmia was associated with a significant excess of pump failure, atrial flutter-fibrillation, asystole, atrioventricular block, ventricular Fibrillation within the first 48 hours of myocardial infarction, and recurrent ischemic events. Larger left ventricular end-systolic volumes and lower ejection fractions were more frequent among ventricular tachycardia patients than in the reference group by 6 weeks. Death rates by 6 weeks were 35% for patients with ventricular tachycardia and 5% for those without the arrhythmia. Irrespective of the stratification of patients by site and type of infarct and presence/absence of bundle branch block, the occurrence of the arrhythmia was associated with reduced 6-week survival. Conclusion In a proportional hazard regression model late sustained ventricular tachycardia was retained as a strong, independent predictor of 6-week mortality after myocardial infarction (hazard ratio 6. 13, 95% confidence interval 4.56-8.25)
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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