1,720,964 research outputs found
Giuria Esterna del Premio letterario Galileo per la divulgazione scientifica - XIII edizione.
No full textCommentary on paper entitled "the effects of ketogenic diet on systolic and diastolic blood pressure: A systematic review and meta-regression analysis of randomized controlled trials"
No full textThe commentary on the paper entitled "The effects of ketogenic diet on systolic and diastolic blood pressure: A Systematic Review and Meta-Regression Analysis of Randomized Controlled Trials," provides a critical appraisal of the evidence presented and identifies key areas for further inquiry. The original paper, which compiles results from 34 high-quality studies, concludes that ketogenic diets significantly reduce systolic and diastolic blood pressures. While acknowledging these findings, the commentary highlights several issues, such as the lack of uniformity in intervention durations and the observed heterogeneity in systolic blood pressure results, suggesting that the impact of the ketogenic diet may vary significantly based on these factors. It also points out the need for clarity in discussing the term "ketogenic diets" due to the diverse protocols that exist. Moreover, the commentary enriches the discussion by proposing that future research should explore the underlying physiological mechanisms in greater depth and consider the impact of dietary composition on metabolic health and blood pressure regulation. This reflection aims to refine the conclusions drawn from the meta-analysis and suggests a more nuanced approach to studying and implementing ketogenic diets in hypertension management
Giant coronary aneurysm and acute myocardial infarction: clinical case report and literature review
No full textCoronary artery aneurysm (CAA) is defined as a localized dilatation of a coronary artery that is larger than the diameter of the adjacent normal vessel by 1.5–2 times [1, 2]. Fusiform aneurysms, with the longitudinal diameter larger than the transversal one, are more common than saccular ones [3]. Most frequently, the right coronary artery (RCA) is involved (40.4%) [4, 5]. In rare cases, if the dilated segment is more than 20 mm in diameter, CAAs are called “giant CAA” (GCAA), which have been reported to have an incidence of 0.02% [6, 7]. The occurrence of multiple CAAs located in more than one coronary artery is even more uncommon [8]. The presence of aneurysmal dilation of coronary vessels may be defined as CAA or coronary artery ectasia (CAE); however, CAE indicates a more diffuse dilatation including 50% or more of the length of a coronary artery. The purpose of this manuscript is to discuss the currently available different therapeutic options of the CAAs and to report our experience with a clinical case of multiple CAAs with GCAA
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
Gut Microbiome and Carotid Artery Intima-Media Thickness: A Narrative Review of the Current Scenario
Full text linkUp to the last update, the gut microbiome (GM) had been associated with a different physiologic host process, including those affecting cardiovascular health. The carotid intima-media thickness (IMT) is an indicator of atherosclerosis and cardiovascular risk. The GM influence on atherosclerosis progression has garnered growing attention in recent years but the consensus in subclinical atherosclerosis remains elusive. The aim of this narrative review is to investigate the connection between the GM and carotid IMT, encompassing mechanisms like the microbiome impact on metabolite production, and systemic inflammation, and its effects on endothelial function. The literature analysis revealed that the GM appears to exert an influence on carotid IMT development, likely through mechanisms involving metabolites’ production, systemic inflammation, and endothelial function modulation. Additional research, however, is needed to finely elucidate the relationship between the GM and atherosclerosis. Specifically, more extensive studies are required to pinpoint individuals at the highest risk of developing atherosclerosis based on their GM composition. This will facilitate the enhancement and optimization of cardiovascular disease prevention strategies and enable the treatments’ customization for each patient. Further investigations are required to refine patient outcomes in the context of probiotics and other interventions aimed at improving microbiome composition and function
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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