1,721,009 research outputs found

    Portal vein embolization and cholangiocarcinoma

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    Preoperative portal vein embolization (PVE) is increasingly used to optimize the volume and function of the future liver remnant (FLR) and to reduce the risk for complications after major hepatectomy for cholangiocarcinoma. In patients with hilarcholangiocarcinoma who are candidates for extended hepatectomy, careful preoperative preparation using biliary drainage, FLRvolumetry, and PVE optimizes the volume and function of the FLR prior to surgery. Appropriate use of PVE has led to improved postoperative outcomes after major hepatectomy for cholangiocarcinoma and oncological outcomes similar to those in patients who undergo resection without PVE. FLRvolumetry is necessary for proper selection of patients for PVE. Analysis of the degree of hypertrophy of the FLR after PVE complements analysis of the pre-PVEFLR volume. FLR degree of hypertrophy and FLR volume are the best predictors of early outcome after major hepatectomy for cholangiocarcinom

    The use of a smartphone application to disseminate guidelines on pancreatic cystic neoplasms

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    Officially release in October 2019, iCyst was developed as part of the project entitled “Current application of the European evidence‐based guidelines on pancreatic cystic tumors”, which was promoted by the Department of General and pancreatic Surgery – The Pancreas Institute, University of Verona Hospital Trust (Institutional Review Board approval number 2390CESC – Comitato Etico delle Province di Verona e Rovigo), and received funding from the United European Gastroenterology Activity Grants – Support of Standards & Guidelines initiatives, dissemination of existing clinical practice 2019 (endorse by the European Digestive Surgery – EDS)

    Risk stratification tools for branch‐duct intraductal papillary mucinous neoplasms of the pancreas

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    Prediction models have been built to improve the correct identification of high‐risk IPMNs and thus the selection of patients for surgery. However, there are currently no tools to recommend the best IPMN surveillance strategy and to distinguish those who might not warrant surveillance at all

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The 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

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    “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

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    We 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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