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Invecchiamento, stress ed ipertensione. 101° Congresso Nazionale Società Italiana di Medicina Interna, Torino 18-22 Novembre 2000
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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
Chronic contained rupture of abdominal aortic aneurysms [Aneurismi dell'aorta addominale rotti cronici tamponati]
No full textBackground. To evaluate on the basis of our experience in 12 patients with chronic contained rupture (CCR) of an abdominal aortic aneurysm, the aetiopathogenesis of the disease, its clinical presentation, its diagnosis and the results of surgery. Methods. From January 1990 to June 1999 a total of 768 patients underwent surgery for abdominal aortic aneurysm: 662 (86.2%) were operated electively and 106 (13.8%) in emergency. Six hundred and fifty- four (85.1%) patients presented an aneurysm without fissuration or rupture (Group A), 102 (13.3%) showed a fissured aneurysmatic sac (Group B) and 12 (1.6%) presented CCR (Group C). Age, gender, risk factors, associated vascular disease and outcome of surgery were compared in the three groups and the anatomic and clinical characteristics of patients with CCR were examined. Results. No statistically significant differences were found between the 3 groups for risk factors or associated vascular disease. Patients with CCR are often normotensive and show smaller retroperitoneal haematoma compared to patients in Group B. Operative mortality in Groups A, B and C was respectively 3, 41.2 and 8.3%. Conclusions. Owing to its possible evolution into free rupture, CCR calls for rapid diagnosis and treatment. CT is the most reliable means of diagnosis. Patients with CCR are more often normotensive and present smaller retroperitoneal haematomas compared to ruptured aneurysm. Retroperitoneal drainage is recommended, together with bacterial culture of the haematoma and more frequent postoperative controls to prevent graft infection
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
Different patterns of blood pressure variability age-related increase in males and females
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