1,721,186 research outputs found
Finally a highly specific test for the differential diagnosis of dyspnea: BNP determination
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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
SEVERE INTRAVASCULAR HAEMOLYSIS AS DELAYED MANIFESTATION OF PERIVALVULAR LEAK IN PATIENTS WITH MITRAL VALVE REPLACEMENT: A REPORT OF TWO CASES
No full textHaemolytic anaemia following mitral valve replacement is uncommon, however in patients who suffer from some degree of perivalvular leak, severe and potentially fatal recurrent intravascular haemolysis can be an annoying problem. We report the cases of two patients with severe haemolytic anaemia observed some years after mitral valve replacement. In one of the two patients the presence of an association between a valvular leak after mitral valve replacement and a calcific atrial wall produced severe and recurrent haemolysis that required multiple blood transfusions. In the second patient the presence of a single valvular leak after mitral valve replacement induced an episode of haemolytic anaemia some years after the operation. These cases point out that in case of unexplained worsening anaemia, a transthoracic (TT) and transesophageal (TE) echocardiogram should be performed, and the possibility of atrial wall alterations in the producing of anaemia should be kept in consideration. In these cases reoperation resolved the recurrence of anemization
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
D-dimer serum levels in a case of type B aortic dissection. A rapid test for the early diagnosis of acute aortic disease?
No full textI trattamenti raccomandati per ridurre il rischio di eventi cardiaci maggiori perioperatori.
No full textNuove linee guida americane 2013 ACC/AHA sul trattamento del colesterolo plasmatico per ridurre il rischio cardiovascolare aterosclerotico: confronto con le raccomandazioni ESC/EAS per la gestione delle dislipidemie
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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
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