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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
aqueous extract reduces glycemia and ameliorates lipid profile and oxidative damage in hypercholesterolemic-diabetic rats
No full textVariations 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
Globularia alypum aqueous extract decreases hypertriglyceridemia and ameliorates oxidative status of the muscle, kidney, and heart in rats fed a high-fructose diet
No full textZygophyllum album aqueous extract reduces oxidative damage in red blood cells and attenuates pro-inflammatory plasma markers in hypercholesterolemic-diabetic rats
Get PDFZygophyllum album (Z. album) is used in traditional medicine for a long time for its anti-diabetic activities. This study had to assess Z. album extract supplementation effects on redox and inflammatory statuses in hypercholesterolemic-diabetic rats. Male rats Wistar (n=36), weighing 200±10 g were divided into three groups (n=12). The first group was rendered hypercholesterolemic (HC) with a high cholesterol diet (1 %). The second group was rendered diabetic (D) by intraperitoneal injection of streptozotocin (STZ) (35 mg/kg of body weight). The third group was rendered hypercholesterolemic-diabetic (HC-D); each group was divided into two groups (n=6), untreated groups (HC, D, HC-D) and treated groups with 1 % Z. album extract (HC-Za, D-Za and HC-D-Za). After 28 days, Z. album treatment lead to a decrease in RBC’s TBARS contents in HC-Za (-44 %), D-Za (-66 %) and HC-D-Za (-23 %) groups. An increase in the antioxidant enzymes activities (superoxide dismutase, glutathione peroxidase, glutathione reductase and catalase) was observed in HC-Za, D-Za and HC-D-Za (p <0.05). IL-1 β and IL-6 concentrations were reduced by -44, -50 and -33 % and -49, 38 and -41 %, respectively in treated groups. A decrease in TNF-α as well as homocysteine and CRP was observed in Z. album treated groups (p <0,05). In conclusion, Z. album reduces radical attack and improves the anti-inflammatory proprieties in hypercholesterolemic-diabetic rats
Sardine proteins (Sardina pilchardus) combined with green lemon zest (Citrus latifolia) improve blood pressure, lipid profile and redox status in diabetic hypertensive rats
No full text
Purpose
This paper aims to study the effect of green lemon zest combined with sardine proteins in diabetic hypertensive rats (DHRs).
Design/methodology/approach
Male Wistar rats (n = 30) weighing 250 ± 10 g were divided into five groups. The first group consumed a diet containing 20 per cent casein (C). The other four groups are rendered diabetic by intraperitoneal injection of streptozotocin (40 mg/kg body weight), then hypertensive by subcutaneous implantation controlled time-release pellet containing ouabain (0.25 mg/pellet). One untreated group (DHR) consumed 20 per cent casein and the three other groups consumed the same diet supplemented with 2 per cent green lemon zest (DHR-lz), or with 20 per cent of sardine protein (group DHR-sp) or with the combination of both sardine proteins and green lemon zest (group DHR-sp + lz).
Findings
DHRs feeding on the combination of both sardine protein (sp) and lemon zest (lz) induced a significant decrease of diastolic blood pressure and heart rates values compared with DHR (p < 0.05). The HDLC values were increased by +55 per cent in DHR-sp + lz compared with DHR group. Moreover, plasma non-HDLC concentrations were decreased significantly compared to DHR, DHR-lz, DHR-sp and C groups. In DHR-sp + lzvs DHR group, TBARS values were decreased by −25 per cent in the liver. Moreover, kidney TBARS were significantly reduced by −66, −51, −65 and −67 per cent compared with C, DHR, DHR-lz and DHR-sp, respectively.
Originality/value
These results suggest that consumption of green lemon zest combined with sardine proteins can reduce blood pressure and tissue oxidative damage and, therefore, help to prevent cardiovascular complications in hypertensive diabetic patients.
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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
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