1,720,955 research outputs found
Role and importance of ultrasound lung comets in acute cardiac care
No full textLung ultrasonography is an emerging, user-friendly and easy-to-use technique that can be performed quickly at the patient’s bedside to evaluate several pathologic conditions affecting the lung. Ultrasound lung comets (ULCs) are an echographic sign of uncertain biophysical characterisation mostly attributed to water-thickened subpleural interlobular septa, but invariably associated with increased extravascular lung water. ULCs have thus been proposed as a complementary tool for the assessment and monitoring of acute heart failure and are now entering into statements in international recommendation documents. Adding lung ultrasonography to conventional echocardiography allows for performing an integrated cardiopulmonary ultrasound examination, and this is an important opportunity for the cardiologist. The technique allows the simultaneous gathering of considerable information about the heart and the lungs to investigate acute and chronic cardio-pulmonary conditions within a non-invasive, radiation-free, single-probe, all-in-one examination. We have here reviewed the pertinent literature on the physical origin of ULCs and on their role and importance in intensive and acute cardiac care settings. We also here propose a new algorithm aimed at implementing evaluation in the diagnostic work-up of patients with suspected acute heart failure. © 2014, The European Society of Cardiology
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
Cardiac magnetic resonance for risk stratification of sudden cardiac death
No full textDespite substantial therapeutic advances in the prevention and treatment of ICM and chronic HF, the burden of SCD remains a global health issue. In clinical practice the primary prevention of SCD is largely based on the identification of severe left ventricular systolic dysfunction by measurement of left ventricular ejection fraction in both ischemic or and non-ischemic heart disease. However, based on this criterion only 10% of primary prophylactic ICD implantations are delivering life-saving therapy, exposing the remaining 90% to all of the risks of ICD implantation and therapy without benefit. CMR is a non-invasive and radiation-free technique able to detect changes in biventricular volumes and function predictive of malignant ventricular arrhtmias and SCD. Of note, CMR offers the unique opportunity of myocardial tissue characterization and the advantage of accurate and reliable detection of arrhythmogenic morphological substrate in both ICM and NICM. LGE is a very established technique to image myocardial fibrosis and a robust predictor of adverse outcome in both ICM and NICM. Nowadays, a growing body of evidence demonstrates LGE imaging could substantially improve patient selection for ICD therapy by providing excellent visualization and characterization of the arrhythmic substrate. Further, the presence of myocardial edema on T2-weighted imaging has been associated with more advanced disease and increased arrhythmic burden in patients with hypertrophic cardiomyopathy. Finally, the development and validation of parametric mapping techniques for the quantification of myocardial edema and diffuse interstitial fibrosis will certainly help improve risk assessment of SCD in the next few years
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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