1,721,023 research outputs found
Contributory role of positron emission tomography in a left ventricular assist device recipient at the time of COVID-19 pandemic
No full textIn this study, We report on the use of fluorine 18-fluorodeoxyglucose (18F-FDG) positron emission tomography (PET) scan examinations for detecting potential COVID-19 respiratory syndrome in asymptomatic left ventricular assist device (LVAD) recipients. Thus, extreme caution and thoughtful approaches should be taken for a timely detection in delicate LVAD populations, especially if patients are living in a high-density COVID-19-infected area, and the potential intention for LVAD treatment is bridge to transplantation
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
Mechanical circulatory supports after pulmonary thrombo-endarterectomy: why, when and how
Full text linkPulmonary endarterectomy (PEA) has radically changed the long-term prognosis of patients with chronic thromboembolic pulmonary hypertension (CTEPH), but the postoperative course is often demanding due to significant hemodynamic and pulmonary circulation variations (1
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
Outflow graft tunneling through the transverse sinus for HeartWare HVAD implantation as bridge to heart transplantation strategy
No full textLeft ventricular assist device graft protection and its intraoperative orientation continues to be a major concern in bridge-to-transplant strategy. Different techniques have been described, including the adoption of a standard full sternotomy approach. We describe our institutional experience of placement of the with HeartWare HVAD® implantable continuous flow pump, with outflow graft tunnelling through the transverse sinus to prepare patients in need of eventual re-sternotomy. Surgical tips are provided in the tutorial videos both for HVAD® placement, and for explantation at the time of heart transplantation
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