1,721,018 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
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
Effect of lercanidipine on kidney microanatomy in Cohen-Rosenthal diabetic hypertensive rats.
No full textThe study was undertaken to determine the effect of treatment with the dihydropyridine-type calcium antagonist lercanidipine on the renal vasculature in Cohen-Rosenthal diabetic hypertensive rats, a genetic model of hypertension associated with type 2 diabetes mellitus. Eight animals were given a daily oral dose of 3 mg/kg lercanidipine in drinking water for 8 weeks, and 6 control animals received no treatment. The effects on blood pressure, glucose level, and kidney microanatomy were evaluated. Lercanidipine reduced systolic blood pressure and glucose level. In the control group small arteries and glomerular arterioles exhibited wall thickening and luminal narrowing. Lercanidipine administration prevented the changes in small-sized arteries and glomerular arterioles. The glomerular changes observed in the untreated Cohen-Rosenthal diabetic hypertensive rats were not seen in the lercanidipine-treated animals. Lercanidipine also had beneficial effects on the renal vasculature, suggesting that the compound may be considered for treating hypertension associated with diabetes
EFFECT OF TREATMENT WITH LERCANIDIPINE ON HEART OF COHEN-ROSENTHAL DIABETIC HYPERTENSIVE RATS
No full textEffect of treatment with lercanidipine on heart of Cohen-Rosenthal diabetic hypertensive rats
No full textThe influence of treatment with the dihydropyridine-type Ca2+ antagonist lercanidipine on heart and coronary microanatomic changes was investigated in spontaneously hypertensive rats, Cohen-diabetic rats, and Cohen-Rosenthal diabetic hypertensive rats. At 12 weeks of age, animals were left untreated (control groups) or were treated for 8 weeks with an oral dose of 3 mg/kg per day of lercanidipine. Wistar-Kyoto rats were used as a normotensive reference group. In spontaneously hypertensive rats and diabetic hypertensive rats, systolic blood pressure was higher in comparison with Wistar-Kyoto rats. Augmented pressure values were decreased by lercanidipine treatment. Systolic blood pressure was slightly higher in Cohen-diabetic rats than in Wistar-Kyoto rats, and this increase was countered by treatment with lercanidipine. In spontaneously hypertensive rats, diabetic rats, and diabetic hypertensive rats, the thickness of left ventricle and cardiocyte area were increased. Focal connective tissue areas and diffuse accumulation of connective tissue were observed in the left ventricle of spontaneously hypertensive and Cohen-diabetic rats, respectively. Pharmacological treatment countered left ventricle thickening and restored cardiocyte area values in subendocardium. An increased thickness of tunica media accompanied by luminal narrowing was found in coronary artery branches of control spontaneously hypertensive and diabetic hypertensive rats. Treatment with lercanidipine countered vascular changes primarily in small-sized coronary arteries. These results indicate that hypertensive, diabetic, and diabetic hypertensive rats undergo cardiac hypertrophy and vascular changes affecting small-sized coronary arteries. Treatment with lercanidipine countered hypertension-related cardiac and coronary changes, suggesting that this dihydropyridine-type Ca2+ antagonist may improve heart and coronary structure in diabetes associated with hypertension
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
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