1,722,229 research outputs found
A follow-up study of second tumor and recurrence among subjects with cancer of the oral cavity, pharynx and larynx
No full textDislessia e codifica fonologica: un test informatizzato per la valutazione
No full textviene presentato uno strumento informatizzato per la valutazione precoce della codifica fonologic
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
MEDICAL HISTORY AND THE RISK OF NON-HODGKIN LYMPHOMAS
No full textThe relationship between selected aspects of medical history and the risk of non-Hodgkin's lymphomas (NHLs) was investigated using data from a hospital-based case-control study conducted in northern Italy on 177 cases of NHL and 561 controls in hospital for acute conditions, other than nonneoplastic or immunological. Among six viral diseases considered, only herpes zoster (shingles) had a relative risk (RR) significantly above unity [RR = 2.7; 95% confidence intervals (Cl), 1.5 to 4.7]. The association, however, was restricted to subjects whose diagnosis of herpes zoster dated back to less than 10 years, suggesting that this slow-acting virus could be reactivated by the early development of NHL. Six of eight bacterial diseases considered showed RR above unity, and the estimate was significant for scarlet fever (RR = 1.9; 95% Cl, 1.1 to 3.5) and pyelonephritis (RR = 5.3; 95% Cl, 1.8 to 16.2). These associations were not restricted to the few years before lymphoma diagnosis. When various classes of infectious or inflammatory diseases were grouped together, no association was evident for viral infections (RR = 0.8; 95% Cl, 0.6 to 1.2), acute bacterial diseases (RR = 1.0; 95% Cl, 0.7 to 1.5), or allergic conditions (RR = 1.0; 95% Cl, 0.6 to 2.1). The risk estimates were nonsignificantly above unity for chronic bacterial diseases (RR = 1.2; 95% Cl, 0.7 to 1.2) and autoimmune conditions (RR = 1.4; 95% Cl, 0.9 to 2.2), and significantly elevated for chronic inflammatory disease (RR = 1.9; 95% Cl, 1.2 to 3.0). Thus, this study confirms that subjects with NHL tend to report a general pattern of elevated frequency of selected chronic infectious and inflammatory diseases
Relations between vegetable, fruit and micronutrient intake. Implications for odds ratios in a case-control study
No full textObjective: To investigate whether the protection observed for some micronutrients, such as beta-carotene, in several observational studies may simply reflect vegetable and fruit intake. Design: A case-control study conducted in Italy. Subjects: The subjects were 1225 colon cancer patients, 728 rectal cancer patients and 4154 hospital controls. Results: For the 16 micronutrients considered, the more closely a micronutrient was correlated with total vegetable and fruit intake, the more it appeared protective against colorectal cancer. Conclusion: When studying the effect of a nutrient on disease risk in an observational setting, its relation to other nutrients and foods must be taken into account
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