1,721,011 research outputs found
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
Mécanique et remodelage cardiaque des lésions congénitales obstructives du coeur gauche
No full textL’objectif de cette thèse est d'analyser en échocardiographie le remodelage et la fonction cardiaque après correction optimale d’un obstacle congénital du cœur gauche et d’identifier de potentiels marqueurs de risque de survenue de fibrillation atriale. Le premier axe de ce travail est une étude prospective multicentrique qui présente le profil évolutif des arythmies atriales chez les adultes porteurs d’une cardiopathie congénitale. Cette étude démontre l’importance de la fibrillation atriale qui devient l’arythmie prédominante après l’âge de 50 ans chez ces patients. Le deuxième axe de travail s’intéresse à la rigidité atriale, un indice échocardiographique corrélé à la présence de fibrose et à la survenue de fibrillation atriale. Nous avons montré que la rigidité atriale est anormale malgré la correction optimale d’un obstacle congénital du cœur gauche, en particulier chez les patients opérés d’une coarctation aortique. Les troisième et quatrième axe de recherche ont exploré spécifiquement le remodelage et la fonction cardiaque après cure de coarctation. Dans la troisième étude, l’analyse en 2D strain a permis d’identifier une forte prévalence de dysfonction atriale chez des adultes et adolescents opérés d’une coarctation aortique. La fonction atriale est influencée par l’anatomie de l’arche aortique ; une relation entre la fonction atriale et la survenue d’évènements cardiovasculaires a été trouvée. Enfin, dans le dernier travail, l’analyse du cœur droit en 2D strain a permis de révéler des anomalies de la fonction ventriculaire droite après cure de coarctation. Nos résultats illustrent l’apport potentiel des nouvelles techniques d’imagerie comme le 2D strain pour identifier des patients à risque de développer une fibrillation atriale dont la prévention est un des enjeux majeurs de la cardiologie congénitale adulte.The objective of this thesis is to analyze myocardial mechanics and cardiac remodeling and function, using transthoracic echocardiography, after optimal correction of a congenital obstruction of the left ventricle and to identify potential risk markers for the occurrence of atrial fibrillation. The first focus of this work is a prospective multicenter study presenting the evolutionary pattern of atrial arrhythmias in adults with congenital heart disease. This study demonstrates the prominence of atrial fibrillation, which becomes the predominant atrial arrhythmia after the age of 50 in these patients. The second area of study focuses on left atrial stiffness, a recent echocardiographic index well correlated with the presence of atrial fibrosis and occurrence of atrial fibrillation. We demonstrate that left atrial stiffness may be abnormal despite optimal correction of a congenital left heart obstruction, especially in patients experiencing aortic coarctation and in overweight patients. The third and fourth lines of research specifically explore remodeling and cardiac function in patients whose aortic coarctation has been repaired. In the third area of research, we use two-dimensional strain analysis to detect a high prevalence of left atrial dysfunction in adults and adolescents after aortic coarctation repair. Left atrial dysfunction is influenced by the anatomy of the aortic arch; a potential relationship with cardiovascular events and left atrial function is identified. Finally, in the last area of research, we identify anomalies of the right ventricular function after coarctation repair. Our results illustrate the potential contribution of new imaging techniques such as two-dimensional strain to identify patients at risk of developing atrial fibrillation, the prevention of which is one of the current challenges in adult congenital cardiology
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
Recommendations of an expert group for the cardiac assessment of non-dystrophic myotonia adult patients treated with mexiletine
Full text linkMexiletine (NaMusclaTM) is indicated for the symptomatic treatment of myotonia in adults with non-dystrophic myotonia. A cardiac assessment is required as mexiletine may have a pro-arrhythmic effect. Long-term safety data supporting the use of mexiletine in patients with non-dystrophic myotonia combined with the extensive clinical experience of an expert group resulted in creation of an algorithm for cardiac monitoring of patients treated with mexiletine. To define the treatment algorithm, several expert workshops including three neurologists, five cardiologists from different French neuromuscular reference centers and one pharmacologist from Italy were set up. These workshops aimed to define the screening and surveillance tools required to ensure the safe use of mexiletine in patients. The recommendations are based on the summary of product characteristics (SmPC), a review of the literature on the safety of mexiletine-treated patients with non-dystrophic myotonia, and the expertise of the authors. The expert group concluded that the cardiac safety profile of mexiletine in these patients appears to be similar to that in the general population. Therefore, patients with non-dystrophic myotonia treated with mexiletine should be monitored as per any patient with cardiac problems who are prescribed a class 1b anti-arrhythmic
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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