1,721,344 research outputs found
Overall cancer incidence and mortality trends among elderly and adult Europeans
No full textOverall cancer incidence and mortality trends among elderly and adul
SMOKING-HABITS AND NON-HODGKINS-LYMPHOMA - A CASE-CONTROL STUDY IN NORTHERN ITALY
No full textBackground. A potential relationship between nonHodgkin's lymphoma and tobacco smoking has been reported. This was further considered in a case-control study conducted in northern Italy in the provinces of Milan and Pordenone. Methods. A total of 429 cases of incident, histologically confirmed non-Hodgkin's lymphoma and 1,157 controls in hospital for acute, nonneoplastic, nonimmunological, non-tobacco-related diseases were interviewed during their hospital stay. Relative risk (RR) estimates and their 95% confidence intervals (CI), according to various measures of tobacco smoking, were derived from multiple logistic regression equations including terms for age, sex, study center, body mass index, and alcohol and coffee drinking. Results. Compared with that for never smokers, the multivariate RR was 1.0 (95% Cl, 0.8 to 1.4) for both current smokers and ex-smokers. No trend in risk emerged with the number of cigarettes smoked per day (RR = 0.9, 95% Cl, 0.7 to 1.3 for less than 20 cigarettes/day, and RR = 1.2, 95% Cl, 0.8 to 1.8, for 20 or more cigarettes/day), or tar yield (RR = 1.2 for less than 17 mg, 1.0 for 17-20 mg, and 0.9 for more than 20 mg). Similarly, no trend in risk was observed with duration of smoking (RR = 1.0 for less than 30 years, 1.0 for 30-39 years, and 1.1 for 40 or more years) or age at starting smoking (RR = 1.1 for less than 20 years, 1. 0 for 20-29 years, and 1.1 for 30 years or over) and, for ex-smokers, with time since quitting (RR = 1.1 for less than 10 years and 1.0 for 10 or more years of smoking cessation). Conclusions. The present study found no association between various measures of tobacco smoking and nonHodgkin' s lymphoma. (C) 1994 Academic Press, Inc
Trends di incidenza e mortalità dei tumori negli anziani e negli adulti in Europa e in Italia.
No full textTrends di incidenza e mortalità dei tumori negli anziani e negli adult
Screening patterns within organized programs and survival of Italian women with invasive cervixal cancer.
No full text
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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