1,721,019 research outputs found
Which stent stenosis of the esophagus which [Quale stent in quale stenosi dell'esofago].
No full textSelf expandable esophageal prosthesis
today represent an effective palliative
treatment in esophageal cancer and
in cases of stenosis or fistula into the
trachea or in the mediastinum, with a
limited number of complications. Covered
metal ones are preferable, while the
plastic stents present a more difficult
position and higher incidence
of migration. Results in benign stenosis
are less successful: their use is
recommended only in selected cases.
Further long-term prospective data are
awaited before biodegradable stents can
be recommended for the management
of benign esophageal lesions
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
Liver microsomal trygliceride transfer protein (MTP) is involved in HCV related hepatic steatosis through genotype specific pathways
No full textVariations 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
Television advertising and children's food choices = Pubblicità televisiva e scelte alimentari dei bambini
No full textThe aim of this work is to provide a picture about the problem of childhood obesity and its relationship with mass media and food advertising. Examining scientific literature, we described the epidemiology of obesity focusing on its increase in children and young people. In particular, it will be examined the effects of television advertising addressed to children, in order to explain how it operates and affects children's food choices. Finally, we will provide information about health promotion and prevention strategies to fight obesity both in European Union (EU) and in Italy. For the EU strategies, we considered the 'Action Plane on Childhood Obesity 2014-2020'. In the case of Italy we focused our attention primarily on SIAN (Servizio Igiene degli Alimenti e della Nutrizione) that operate through the local health authorities of the various Italian regions, to promote health. Moreover, we considered the actions that have taken place to reduce the influence of mass media and food advertising on the food habits of children
Alcohol consumption and risk of Barrett's Esophagus. Mini-review of recent literature
Full text linkAlcohol consumption has a substantial importance in the causation of cancer of the oral cavity, pharynx, liver, colon, rectum; and in women, breast. It is also recognized as an independent risk factor for esophageal squamous cell carcinoma (ESCC). Nevertheless, the association with esophagus adenocarcinoma (EAC) is still not completely defined; as well as the association between alcohol intake and Barrett's Esophagus (BE). The aim of this mini-review is to summarize recent findings from population studies focused on the association between alcohol consumption and risk of BE. The research was carried out in PubMed, filtering for studies conducted in the period 2009-2015. Our mini-review has shown no association between the consumption of alcohol and BE. Some type of alcoholic beverages has shown an inverse association. Direct public health applications of these findings are limited, considering the causal link between moderate-to-heavy alcohol consumption with increased risks of several cancers. Given the rising incidence of BE and EAC, it is important to understand the interplay of dietary and lifestyle factors that influence the development of these conditions
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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