1,721,071 research outputs found
Function of GH/IGF-I axis in aging:multicenter study in 152 healthy elderly subjects with diffent degrees of physical activity
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Dietary calcium insufficiency in elderly free-living women: an italian multicenter study.
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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
Effectiveness and safety of the A-H1N1 vaccine in children: a hospital-based case-control study
Get PDFObjective: To verify whether vaccination against the
A-H1N1 virus in the paediatric population was effective
in preventing the occurrence of influenza-like illness
(ILI) or was associated with adverse events of special
interest.
Design, setting and patients: A caseecontrol
analysis was performed as part of surveillance of
children hospitalised through the emergency
departments of eight paediatric hospitals/wards for ILI,
neurological disorders, non-infectious mucocutaneous
diseases and vasculitis, thrombocytopaenia
and gastroduodenal lesions.
Results: Among 736 children enrolled from November
2009 to August 2010, only 25 had been vaccinated
with the pandemic vaccine. Out of 268 children
admitted for a diagnosis compatible with the adverse
events of special interest, six had received the A-H1N1
vaccine, although none of the adverse events occurred
within the predefined risk windows. Only 35 children
out of 244 admitted with a diagnosis of ILI underwent
laboratory testing: 11 were positive and 24 negative for
the A-H1N1 virus. None of the A-H1N1 positive
children had received the pandemic vaccine. The OR of
ILI associated with any influenza vaccination was 0.9
(95% CI 0.1 to 5.5).
Conclusions: The study provides additional
information on the benefiterisk profile of the pandemic
vaccine. No sign of risk associated with the influenza
A-H1N1 vaccine used in Italy was found, although
several limitations were observed: in Italy, pandemic
vaccination coverage was low, the epidemic was
almost over by mid December 2009 and the A-H1N1
laboratory test was performed only during the
epidemic phase (in <10% of children). This study
supports the importance of the existing network of
hospitals for the evaluation of signals relevant to new
vaccines and drugs
Treatment of solitary autonomous thyroid nodules by parcutaneous ethanol injection: results of an italian multicenter study
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