1,721,033 research outputs found
Fattori di rischio protrombotici nei pazienti con neuropatia ottica ischemica anteriore non arteritica.
No full textpost filter thromboembolic prophylaxis in vena cava filter carriers
No full textpost filter thromboembolic prophylaxis in vena cava filter carrier
Use of edoxaban for the treatment of venous thromboembolism in HIV-infected patients
No full textUse of edoxaban for the treatment of venous thromboembolism in HIV-infected patients
Thromboembolic events following mRNA vaccines for COVID 19: a case series
No full textTo the Editor,
In response to the SARS-COV-2 pandemic, different types of vaccines have been developed: mRNA vaccines, non-replicative vector vaccines, inactivated and subunit vaccines [1]. By late December 2020, mass vaccination campaigns have started all around the world. Thromboembolic events have been reported after SARS-COV-2 vaccines [2], in particular after ChAdOx1 n COV-19 vaccine (Oxford- AstraZeneca) [3] and the Ad26.COV2.S (Johnson Johnson/Janssen) [4]. In these cases, a particular severe syndrome has been described (VITT) characterized by thrombosis, particularly at unusual sites including cerebral/splanchnic thrombosis, mild to severe thrombocytopenia and positive PF4-heparin ELISA and platelet activation assays [3, 5]. Despite the excellent safety profile of mRNA vaccines, some cases of venous thromboembolism(VTE) related to this type of vaccination have been recently reported in literature [6–8], including cerebral vein thrombosis [9–11]. Herein, we described our single centre experience of 15 cases of VTE following mRNA vaccination. From May 2021 to September 2021, 112 patients were admitted to our Institute for VTE. Among them, fifteen patients were admitted for the onset of a thromboembolic event occurred after the administration of mRNA vaccines. Nine were male and 6 were female. The median age was 51 years (range 29–74 years), with 13 patients younger than 60 years old. Overall, 11 patients received Comirnaty BNT 162b2 Pfizer/BioNTech vaccine while 4 the Spikevax 1273 Moderna vaccine
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
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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