1,721,066 research outputs found
Ruolo dell’acido urico nell’ipertensione arteriosa e nella progressione delle nefropatie.
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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
Improvvisa perdita bilaterale della vista in una paziente in trattamento emodialitico Cronico:un caso di neurite ottica ischemica non artritica anteriore(NAION)
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Safety and Potential Side Effects of beta2-Agonists: A Still Debated Question.
No full textIn the last years, the safety profile of β2-agonists has been largely discussed as there are concerns about the adverse effects of their regular use. In this review, we analyze the main questions relating both morbidity and mortality of currently available β2-agonists. Although questions still remain regarding the issue of safety, evidence from epidemiological studies is strongly suggestive that the use of β2-agonists is not dangerous
Long-term growth hormone therapy in mitochondrial cytopathy.
No full textObjective: To describe in a 5-year-old Caucasian male with mitochondrial cytopathy, a biochemical growth hormone (GH) deficiency associated with normal GH biological activity as evaluated by Nb-2 cell bioassay and normal serum IGF-I and IGFBP3 values increasing slightly after GH administration. Method: Serum GH concentrations were measured with a commercial immunofluorometric assay and with a biological assay, which uses the Nb2 cell line. Serum IGF-I and IGFBP3 concentrations were measured with RIA. Results: The GH-supplementary therapy was initially effective in terms of growth gain, but no therapeutic benefit was observed over a long period of time. Conclusion: In patients suffering from mitochondrial cytopathy, short stature seems to be attributed more to a disease-related inadequate protein substrate than to the non-classical GH deficiency
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