1,720,980 research outputs found
A unique case of foreign body aspiration and recurrent pneumothorax
No full textPaediatric foreign body aspiration can be related to a high morbidity/mortality rate, especially in young children, and pneumothorax can be a severe associated issue. We describe a case of a 13-year-old girl with recurrent pneumothorax in bilateral bullous lung, twice previously treated at our institution by robotassisted bullectomy, and once again showing same signs and symptoms. At conventional thoracoscopy an inorganic foreign body was found to be located pointing upwards the apex. We believe this may have acted as a contributory cause in the persistence of the clinical picture, despite the surgical removal of the underlying pathology
Subcutaneous fistula in infancy: a different diagnosis of a perianal discharging nodule
No full textFistula-in-ano (FIA) is an abnormal communication between the anal canal and the perianal skin with an external exit hole draining spontaneously. In FIA the fistulous tract starts from a deep acute purulent inflammation of the anal region, usually an abscess. Perianal abscess (PA) generally arises from the acute infection of a small gland just inside the anus due to the entry of bacteria or foreign material in the gland. In the first year of life PA and FIA are associated and, in contrast to other age groups, in infants they seem to have mainly a malformative origin, without the presence of an underlying concomitant disease. PA is normally the forerunner sign of FIA while it is exceptional to find FIA alone.
We present here the case of a 8-month-old boy with a superficial subcutaneous fistula-in-ano unpreceded by PA.
Pathogenesis and management are reported as well as a review of the literature
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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