1,721,125 research outputs found
Less sodium and more potassium to reduce cardiovascular risk
No full textAn increase in the dietary consumption of salt is associated with a progressive increase in blood pressure (BP) values, and with an increase in the incidence of cardiovascular disease. Reducing the dietary intake of sodium in the population is a public health goal in many countries around the world. Numerous studies have described a linear relationship between high dietary salt intake and the development of arterial hypertension, as well as a negative association between high potassium intake and BP values. Furthermore, there is evidence that a reduction in salt consumption and an increase in potassium consumption can be associated with a decrease in BP values, improving the general state of health. Therefore, it would be desirable to further improve awareness of the risks associated with an excessive intake of salt and low potassium by maintaining public education campaigns and trying to overcome the numerous obstacles to a process of greater responsibility for people regarding nutrition
Authors' response to comment on: Less sodium and more potassium to reduce cardiovascular risk and the PURE study
No full textOsteoprotegerin in Cardiovascular Disease:Ally or Enemy?
No full textThe OPG/RANK/RANKL axis is now recognized as a master regulator of bone remodeling, controlling osteoclast's maturation and extracellular matrix calcification. Nevertheless, a number of clinical and basic science studies conducted in the last few years demonstrated that the triad could be also involved in several physiological and pathological processes outside the bone tissue. In particular, evidences have been collected showing an active participation of OPG and RANKL in vascular pathology, including atherogenesis and arterial calcification. A series of epidemiological studies also showed that increased circulating levels of OPG are associated with significant, independent predictive value for future cardiovascular mortality/morbidity. However, the human studies did not unravel whether OPG should be considered as a promoter, a protective mechanism or is instead neutral with regard of vascular disease progression. Main objective of the present review is to summarize findings from both in vivo and in vitro investigations on the role played by OPG in vascular disease progression and to delineate a plausible scenario on the actual involvement of the OPG/RANK/RANKL triad and TRAIL in cardiovascular pathology
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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