1,721,398 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
Expression of 8-OH-G, GFAP and Iba-1 in catheterized rats.
No full text<p>(A) Photomicrographs of immunostaining for 8-OH-G (green), GFAP (red) and Iba1 (red) in normal rats and catheterized rats. Enlargements in the insets demonstrate the changes in cell shape and expression of 8-OH-G, GFAP and Iba-1. There is no significant difference in number of cells showing immunoreactivity for 8-OH-G, GFAP and Iba-1 between catheterized rats and normal rats. Scale bars, 100 µm and 25 µm in the inset. (B1, B2 and B3) Number of cells showing immunoreactivity for 8-OH-G, GFAP and Iba-1 in both sides of spinal dorsal horn. Data are expressed as mean±SEM. n = 10 for B1-3. Compared to the normal rats, catheterization did not induced significant production of 8-OH-G, activation of glial cells.</p
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
Numbers of cells expressing 8-OH-G, GFAP, Iba-1 and numbers of double-stained cells in all rats.
No full text<p>(A1, A2) Merged images of photomicrographs immunostaining for 8-OH-G (green) and GFAP (red) in L5 sections of neuropathic rats treated with NS were taken as example, a rectangular area was manually outlined in the dorsal horn using the rectangular marquee tool, and the size of every selected area is 50 cm×22 cm (2500 µm×1100 µm in the spinal sections). At 20-fold magnification, counts were obtained of the numbers of cells in the areas outlined in the rectangular that were positive for 8-OH-G, GFAP and Iba-1, double staining cells in the areas were also counted. (B1, B2) Number of cells showing immunoreactivity for 8-OH-G in both sides of spinal dorsal horn. (B3, B4) Number of cells showing immunoreactivity for GFAP and Iba-1 in both sides of spinal dorsal horn. (B5, B6) Number of 8-OH-G-ir astrocytes and 8-OH-G-ir microglia in both sides of spinal dorsal horn. Data are expressed as mean±SEM. n = 10 for B1-6. Compared with the sham rats, L5 SNL induced significant production of 8-OH-G, activation of glial cells and increase of 8-OH-G-ir glial cells, †p<0.01, by one-way ANOVA. HRS blocked the production of 8-OH-G, glial activation and increase of 8-OH-G-ir glial cells, *p<0.01, by one-way ANOVA. Compared to contralateral side, L5 SNL induced significant production of 8-OH-G, activation of glial cells and increase of 8-OH-G-ir glial cells in ipsilateral side. #p<0.01, by one-way ANOVA.</p
Immunostaining for 8-OH-G and Iba1 in sham rats, NS-treated neuropathic rats and HRS-treated neuropathic rats.
No full text<p>Pictures in columns B and C are magnification of the insets shown in column A. Enlargements in the insets in columns B, C and D demonstrate the changes in cell shape and expression of 8-OH-G (green) and Iba-1 (red). Double-staining demonstrate colocalization (arrows) of 8-OH-G and Iba1. Note that an increased number of cells showing immunoreactivity for 8-OH-G and Iba-1 in neuropathic rats treated with NS as compared to the sham rats. And number of cells showed colocalization of 8-OH-G and Iba-1 in NS treated neuropathic rats was significantly increased as compared to the sham rats. HRS greatly reversed L5 SNL induced production of 8-OH-G, activation of microglia, and increase of 8-OH-G-ir microglia. Scale bars, 100 µm and 25 µm in the inset.</p
Immunostaining for 8-OH-G and GFAP in sham rats, NS-treated neuropathic rats and HRS-treated neuropathic rats.
No full text<p>Pictures in columns B and C are magnification of the insets shown in column A. Enlargements in the insets in columns B, C and D demonstrate the changes in cell shape and expression of 8-OH-G (green) and GFAP (red). Double-staining demonstrate colocalization (arrows) of 8-OH-G and GFAP. Note that an increased number of cells showing immunoreactivity for 8-OH-G and GFAP in neuropathic rats treated with NS as compared to the sham rats. And number of cells showed colocalization of 8-OH-G and GFAP in NS treated neuropathic rats was significantly increased as compared to the sham rats. HRS greatly reversed L5 SNL induced production of 8-OH-G, activation of astrocytes, and increase of 8-OH-G-ir astrocytes. Scale bars, 100 µm and 25 µm in the inset.</p
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
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