1,720,973 research outputs found

    Does oral anticoagulant therapy (OAT) play a key role in triggering and maintaining calciphylaxis? A case report proposing a new etiological and nosological review

    Get PDF
    Calcific uremic arteriolopathy (CUA) is a rare but very serious morbid condition often observed during secondary hyperparathyroidism (HPTS). CUA affected patients by advanced chronic kidney disease (CKD). The Authors report a clinic case of a 63-year female diabetic patient on chronic hemodialysis that suddenly showed progressive necrotic cutaneous lesions similar to CUA. The status HPTS was in good control. This case led the authors to consider different etiological causes especially when vascular calcification. In the patient the main noxae could be the anticoagulant oral therapy (AOT) together smoking and inflammation induced by a severe malnutrition. Therapies proposals were sodium thiosulfate, based amino acids nutrition, an accurate and constant surgical medication of necrotic injuries. After the complete healing of skin lesions and good correction of nutritional status, the Authors asserted that OAT especially if associated with malnutrition smoking and diabetes can lead to necrotic lesions similar but not classifiable as calciphylaxis

    Going Beyond Counting First Authors in Author Co-citation Analysis

    Get PDF
    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

    Get PDF
    “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

    Get PDF
    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
    corecore