1,720,965 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
Un caso di elastosis perforans serpiginosa in un paziente in terapia con D-penicillamina per morbo di Wilson e follow-up dopo 18 anni.
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UN RARO CASO DI CHERATODERMIA:L'ACROCHERATOELASTOIDOSI
No full textL'acrocheratoelastoidosi è una cheratodermia palmoplantare eereditaria ad eziopatogenesi non ancora completamente conosciuta. Tale patologia è caratterizzata da papule traslucide del colore della cute normale o giallognole, del diametro di 4-5 mm, localizzate a livello della superficie palmare delle mani e plantare dei piedi. Riportiamo un caso di una donna di 50 anni, nella quale abbiamo posto diagnosi di acrocheratoelastoidosi
Isolated oral lesions: an unusual manifestation of secondary syphilis
No full textThe oral cavity is the most common extragenital site of infection. We report a case of a 50-year-old female with isolated oral ulceration as the presenting manifestation of secondary syphilis. In contrast with the oral lesions of primary syphilis, which tend to be solitary, painless, indurated ulcers, oral lesions of secondary syphilis are typically painful, multiple, and accompanied by a concomitant cutaneous eruption
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