1,721,064 research outputs found
Prognosis of early squamous cell carcinoma of the esophagus after surgical therapy
No full textBetween 1980 and 1995, 91 (13.7%) out of 666 patients were determined by pathologic staging to have a superficial squamous-cell esophageal carcinoma of the thoracic esophagus. The male to female ratio was 3.3:1, and the mean age 60 years. Postoperative mortality was 4.3%. The median follow-up was 48 months (range 3-179). Survival was significantly decreased with increased depth of tumour invasion and presence of nodal metastases (P=0.03). Recurrent disease was prevalent in patients with submucosal tumours compared to those with mucosal tumours (P < 0.05). Only intra-epithelial and intramucosal carcinomas deserve the definition of 'early' tumours. Given the relative inaccuracy of current staging modalities and the low morbidity and mortality rates associated with surgical resection, surgery appears to be the mainstay of treatment of superficial squamous-cell esophageal cancer
[Preliminary physiopathologic remarks on the use of the isolated swine liver in the treatment of acute liver failure]
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[Functional evaluation of the intrathoracic stomach after esophagectomy for esophageal cancer]
No full textSixteen patients underwent evaluation of duodenogastric reflux and gastric function 1 to 7 years after esophagectomy, high intrathoracic anastomosis, and pyloric divulsion for esophageal cancer. Ten patients (62%) had either postoperative digestive symptoms or endoscopic mucosal lesions, cholescintigraphy demonstrated duodenogastric reflux in 11 cases (69%). No gastric motor activity was recorded on manometry. 24-hour pH gastric monitoring showed that the area under the curve less than 4 was significantly less than in controls (p = 0.0003). The results of the present study show that duodenogastric reflux is a common event after esophageal replacement with the stomach. The interaction between acid and alkaline secretions plays a role in the pathogenesis of mucosal lesions, and it may explain the partial failure of the current therapeutic strategies
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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