1,720,980 research outputs found
High platelet reactivity and periprocedural myocardial infarction in patients undergoing percutaneous coronary intervention: A significant association beyond definitions
No full textNo abstract availabl
Clopidogrel Versus Ticagrelor for Antiplatelet Maintenance in Diabetic Patients Treated With Percutaneous Coronary Intervention: Results of the CLOTILDIA Study (Clopidogrel High Dose Versus Ticagrelor for Antiplatelet Maintenance in Diabetic Patients)
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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
Efficacy of clopidogrel reloading in patients with acute coronary syndrome undergoing percutaneous coronary intervention during chronic clopidogrel therapy (from the Antiplatelet therapy for reduction of myocardial damage during angioplasty [ARMYDA-8 RELOAD-ACS] trial)
No full textDispelling 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
Impact of Chronic Renal Failure on Ischemic and Bleeding Events at 1 Year in Patients With Acute Coronary Syndrome (from the Multicenter START ANTIPLATELET Registry)
No full textChronic renal failure (CRF) impairs prognosis in patients with acute coronary syndromes (ACS); the differential impact of CRF on ischemic and bleeding events in the setting of ACS is unclear. We explored the predictive role of CRF, identified by different equations for the glomerular filtration rate estimation, on the occurrence of the composite end point, including both ischemic cardiovascular and major bleeding (major adverse cardiovascular and bleeding events [MACBE]) at 1 year, and its components. We accessed each patients data from 718 participants in the prospective, multicenter, and START ANTIPLATELET registry, performed on patients with ACS. The ability to predict the risk of MACBE was modest and similar for Cockcroft-Gault, MDRD, and CKD-EPI equations (area under the curves: 0.55, 95% confidence interval [CI] 0.47 to 0.63; 0.53, 95% CI 0.45 to 0.61; 0.54, 95% CI 0.46 to 0.62; respectively, overall p = 0.63). The incidence of MACBE in patients with CRF was 12.6 versus 7.4 per 100 patients/year in those with preserved renal function (adjusted odds ratio [OR] 1.80, 1.02 to 3.20, p = 0.045); the absolute excess in events rate due to CRF was higher for ischemic events (3.5%) than for major bleeding (2.6%). The increased occurrence of MACBE was even greater in patients with CRF and concomitant anemia (OR 2.16) and in patients with severe CRF (OR 2.78). In conclusion, our study indicates that, in patients with ACS, CRF impairs the clinical outcome at 1 year, especially when severe and when is concomitant with anemia. CRF is associated with greater absolute increase of ischemic events than major bleeding
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