1,721,010 research outputs found
Inducible nitric oxide synthase and vascular endothelial growth factor expression in laryngeal neoplasia: correlation with angiogenesis
No full textExpression of CD44 standard and variant isoforms in parotid gland and parotid gland tumors
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Reduction of transforming growth factor-beta type II receptor(TGF-beta RII) expression in laryngeal carcinogenesis
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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
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
Fluorescence in-situ hybridization and dermoscopy in the assessment of controversial melanocytic tumors.
Full text linkAlthough the 'gold standard' for melanoma diagnosis remains histopathological analysis, presently dermoscopists play a significant role in the diagnostic process. However, even a combined approach may not allow a clear-cut judgment on equivocal melanocytic lesions. Fluorescence in-situ hybridization (FISH) can offer assistance in the evaluation of chromosome abnormalities associated with malignancies, and its role is emerging in melanoma diagnosis. The aim of this study was to evaluate the diagnostic role of the FISH in the assessment of controversial lesions, defined as those lesions showing discrepancies between dermatoscopic and histological evaluations. Twenty clinically and histologically ambiguous melanocytic lesions were selected. After the first histopathologic diagnosis, a second pathologist examined the specimens in a blinded review for a second opinion and to identify the most suitable areas to hybridize using probes specific to RREB1, MYB, and CCND1 genes and the centromere of chromosome 6. The first histopathological evaluation led to the diagnosis of melanoma in seven cases, whereas the second identified eight cases of malignant melanoma and was in agreement with the first in 65% of cases and with dermoscopy in 40% of cases. Cytogenetic abnormalities detected by FISH are markers of malignancy that can be useful in the characterization of difficult-to-diagnose melanocytic tumors, when the dermatologist and the pathologist have a different opinions
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