1,720,976 research outputs found
Le colecistiti acute alitiasiche: fisiopatologia e trattamento
No full textThe absence of reliable correlation between clinical features and pathological evolution and the molteplicity of risk factors, often related to various pathophysiological pathways, make of acute acalculous cholecystitis a clinical entity well distinct from other affecting gallbladder. In spite of the slight incidence, its occurrence among serious multiple trauma patients may reach 90%. The arguability of diagnostic criteria and the missed or delayed recognition, then affecting timing of surgery are important in determining morbidity and mortality of this condition. The Authors reviewed 16 patients operated for acute acalcolous cholecystitis. US, although sometimes underestimate the severity of affection and cause false negatives, had been the first choice investigation because of its rapidity, facility of execution and repeatability. TC adds subsequent information when US images were doubtful and reveleated pericholecystic involvement more carefully. Hepatobiliary scintigraphy has high diagnostic accuracy but needs of too long execution time. Reasons of early cholecystectomy lay on clinical and experimental evidences that focal or diffuse ischemic damage of gallbladder's wall may affect natural history of the illness and infectious overwhelming is a late event. Surgical intervention has been performed in 16 patients, must within 24 hours. Morbility has been very low, mortality scored 18.7%
Subareolar injection may more accurate than peritumoral injection for sentinel lymph node biopsy in breast cancer
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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
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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