1,720,967 research outputs found
Prenatal diagnosis of congenital defects of the abdominal wall.
No full textSono esaminati 22 casi di exonfalo e 16 di gastroschisi, registrati dal Centro di epidemiologia e prevenzione delle malformazioni congenite del Veneto. Il tasso di malformazioni associate risulta del 25 % per la gastroschisi e del 40 % per l 'onfalocele. Sono descritti criteri per una diagnosi prenatale accurata delle due malformazioni e viene discusso l'approccio al feto malformato
Atresia delle vie biliari extraepatiche: problema non solo chirurgico.
No full textDopo una revisione critica della letteratura sull'argomento, vengono riportati i risultati dell'intervento di epato-porto-enterostomia nella cura dell'atresia delle vie biliari extraepatiche, di tipo « non correggibile ». Sono anche elencate le complicanze, alcune legate direttamente all'intervento come quelle post operatorie precoci e l 'angiocolite, altre, come l'evoluzione cirrotica e l'ipertensione portale, più probabilmente connesse con la malattia, di base, inoltre, sulla base dell'esperienza personale circa i molteplici problemi chirurgici e medici,di questi, pazienti viene proposto oltre a uno schema di follow-up, uno schema di trattamento post operatorio di tipo medico. Esso include provvedimenti di tipo dietetico (apporto lipidico in parte sotto forma di MCT) e di tipo farmacologico (uso del fenobarbital come coleretico per l a profilassi dell'angiocolite e supplemento di vitamine liposolubili per Via parenterale). Per la sorveglianza della malattia è suggerito un accurato monitoraggio per la colangite , l' ipertensione portale e la evoluzione istologica dell'epatopatia
NEONATAL MALIGNANT SOLID TUMORS
No full textWe reviewed the 8 malignant solid tumors in children less than 1 month of age observed at the Pediatric Surgical Department of Padua University from 1968 to 1985. These were 6 neuroblastomas, 1 Wilms' tumor and 1 angiosarcoma; 5/8 are alive without evidence of disease with a median follow-up of 8 years. The importance of combined therapeutic approach and conservative surgery are stressed. The sensitiveness of infants to both chemotherapy and radiotherapy are considered. Surgery remains the treatment of choice when a radical resection is possible
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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