1,721,155 research outputs found
A national study of the epidemiology, clinical features and microbiology of the haemolytic uraemic syndromes
No full textThis thesis reports the analysis of clinical, laboratory and microbiological data from a national collaborative study of the haemolytic uraemic syndromes (HUS), in which data was obtained from the acute phase and at follow-up to one year from the illness. Two hundred and ninety eight children were notified, stool samples were obtained from 198, and follow-up data was available from 272. Ninety five percent of cases presented after a prodromal illness of diarrhoea, and of these 75% had bloody diarrhoea. The incidence was greatest in the one to two year age range, most commonly affected under five's, and 80% of cases presented between April and October. Verocytotoxin producing Escherichia coli (VTEC) were isolated from 33%, although the success rate was related to the timing of samples - VTEC were isolated from 66% of cases in whom stools were collected at up to 3 days from onset of diarrhoea. By comparison, VTEC were isolated from only 8% of children who had bloody diarrhoea but had not developed HUS. The mortality rate for children with diarrhoea-associated HUS was 7.7%, with 12.3% having long term sequelae. A high presenting neutrophil count was noted in those who died in the acute phase and in those with long term sequelae. Sixteen children did not have a prodromal illness, and presented sporadically throughout the year. VTEC were not isolated from any case. Although the mortality and morbidity was 78%, the presenting neutrophil count was uniformly low in this group. This study confirmed that for epidemiological, clinical and microbiological reasons cases of HUS with or without a diarrhoeal prodrome must be considered separately, and that the former group is closely associated with VTEC in the United Kingdom.</p
The iCub Cognitive Humanoid Robot: An Open-System Research Platform for Enactive Cognition
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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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