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Ansiolisi perioperatoria nei pazienti sottoposti a tromboendoarterectomia carotidea (TEAC).
No full textAnsiolisi periopeatoria nei pazienti sottoposti a tromboendoarterectomia carotidea (TEAC)
No full textEndovenous laser treatment (EVLT) in saphenous vein insufficiency. Preliminary study
No full textBACKGROUND: The aim of this study was to verify the efficacy of this novel method for the treatment of chronic venous insufficiency. METHODS: From 1/09/2002 to 30/09/2004 we treated 150 patients with internal saphenous vein insufficiency using the EVLT® treatment. The laser device used was adiode laser with an energy emission of 810 nm. We performed the procedure in all cases in the operating theater. In the cases of percutaneous insertion, we used the ecodoppler intraoperative evaluation. The ecodoppler control was performed in all cases to test the endoluminal and sapheno-femoral cross right position. This was also confirmed by skin transillumination. General anaesthesia was used only in the first 7 (4.6 %) patients; peridural anaesthesia was performed in 38 (25.4 %) patients and loco-regional anaesthesia in 105 (70 %). Where necessary, we performed flebectomies using the Muller technique. RESULTS: In the first two (6 %) cases we observed an incomplete but asymptomatic saphenous vein obliteration due to an incorrect technique. In 138 (92 %) cases, there was a completed saphenous vein obliteration at the one-month ecocolordoppler control and the ecocolordoppler vein identification was very difficult at the 4-month followup. The initial 21 (14 %) patients were submitted to a sixmonth ecocolordoppler control with complete obliteration of the treated vein in all cases. At the 12-month follow-up, of the 90 patients examined, 87 were found to have a complete vein obliteration and 90 were symptom-free, and at the 24-month follow-up, 37 of the 40 patients examined had a complete vein obliteration. CONCLUSIONS: Modern surgery aims at being as minimally invasive as possible. Laser treatment in our opinion, and in this we are supported by the literature, may be the best alternative to traditional surgery for chronic venous insufficiency due to its avoidance of skin incision, and incision-associated complications, with optimal early and late surgical results
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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