1,720,976 research outputs found
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
Biodisponibilità dell'estradiolo in differenti modalità di somministrazione dellla terapia ormonale sostitutiva
No full textIdentification of patients with high osteoporosis risk: Analysis of FRAX and phalangeal ultrasonography in a female population in North-East Italy
No full textAim. Osteoporosis is a worldwide health problem and bone fractures from osteoporosis are among the major causes of disability, with a great impact on the national health budgets. The aim of our study was to analyze the efficacy of FRAX algorithm and phalan-ger ultrasound to predict the risk of osteoporotic fractures, in order to identify a high risk population to examine with a second level diagnostic analysis. Methods. The study population was composed of 1208 premenopausal, perimenopausal, and postmenopausal women, between 40 and 81 years. For each woman phalangeal QUS was performed and FRAX index was calculated. The FRAX index was evaluated according to standard plots available on web (http://www. shed.ac.UK/FRAX/index.htm). Results. Analysing the correlation between women age and phalanger bone ultrasound values we know that all parameter decrease with increasing of age. We found a significant difference between FRAX index and the ultrasound parameters (P<0.05) to predict a major osteoporotic fracture, we did not find differences between age and ultrasound parameters. Furthermore, we show that after correction per age of the women the ultrasound parameters lose their significant correlation with major osteoporotic fractures. Finally, FRAX index showed a good AUC and in our population and a 10-year probability over 9-4% of major osteoporotic fractures had a good specificity (88%) and sensitivity (83%) to predict osteoporotic fractures. Conclusion. Our data suggest that FRAX in-dex alone could be used to address high risk women to more invasive tests but we need more data about ultrasound parameters.Funding.-This study was supported by grants from Tavagnacco municipality, Udine, Italy
Valutazione dell'efficacia predittiva del modello di Gail nel calcolo del rischio di carcinoma della mammella
No full text24-Hour ambulatory blood pressure monitoring in smoker and non smoker post-menopuasal women treated with ERT
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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
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