1,720,976 research outputs found
Pandemia. L’ennesimo stress test per lo Statuto dei lavoratori
No full textThe essay looks at the 50th anniversary of the Workers’ Statute (“Statuto”) moving from the recent ongoing economic and social crisis related to the Covid-19 pandemic. According to the author’s opinion, this new stress test for the Statuto does confirms its vitality. The Statuto stands still up to date as a tool to ensure to all workers the effective enjoining of fundamental rights at work
Echocardiographic evidence of transmural contraction gradient: The role of ventricular geometry to maintain normal chamber function in human hypertension
No full textLEFT-VENTRICULAR HYPERTROPHY AND GEOMETRIC REMODELING IN HYPERTENSION - STIMULI, FUNCTIONAL CONSEQUENCES AND PROGNOSTIC IMPLICATIONS
No full textObjective: To provide a coherent overview of the stimuli to development of abnormal left ventricular geometric patterns, their impact on cardiac function and their relationship to the prognosis of hypertension, studies performed by the authors and other investigators are reviewed. Results: Clinical and experimental studies have shown that an elevated left ventricular mass reflects the additive effects on the heart of higher arterial pressure over time, increased cardiac volume load related to obesity, sodium intake or other stimuli, reduced contractile efficiency of the myocardium and altered arterial hemodynamics related to vascular hypertrophy and atherosclerosis. The heart may adapt to hypertension by developing concentric or eccentric left ventricular hypertrophy, or the newly described pattern of concentric left ventricular remodeling, or by retaining normal left ventricular geometry. Each geometric pattern is associated with a distinct combination of pressure and volume stimuli, contractile efficiency (reduced in those with concentric left ventricular hypertrophy or remodeling) and prognosis (worst with concentric hypertrophy and best with normal left ventricular geometry). An appraisal of left ventricular mechanics by a physiologically appropriate midwall-shortening/end-systolic stress relationship can identify impaired contractility in an appreciable proportion of hypertensive patients. Numerous studies have shown that increased left ventricular mass and abnormal geometry have a strong predictive value for cardiovascular death, myocardial infarction and stroke. Conclusions: Increasing evidence has demonstrated the central importance of left ventricular mass and geometry in the pathophysiology and prognosis of hypertension. These measures of preclinical disease can aid clinical decision-making by separating patients into those with a high or a relatively low risk, and hence a need for pharmacological treatment or its intensification, as well as providing useful bioassays for a spectrum of clinical and experimental research
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
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