1,721,448 research outputs found
El tractor
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Reply-Letter to the Editor-Nutritional status and all cause mortality in older adults with acute coronary syndrome
No full textNo abstract availabl
Functional assessment 3.0: From wire through angio to OCT
No full textPrecision percutaneous coronary intervention (PCI) is a constantly
evolving field, which is redefining the standards for indicated and
optimised procedures. Physiological assessment of coronary stenoses is recommended by clinical practice guidelines as a tool to
investigate the presence of ischaemia-generating lesions and to
assist in making decisions on coronary revascularisation1
. Imagingguided PCI is associated with a more favourable prognosis than
an angio-guided approach, especially in complex coronary settings
(i.e., left main stem disease, chronic total occlusion, long lesions
with severe calcifications)2
. The utilisation of either physiology or
imaging post PCI to optimise the procedural result is associated
with improved outcomes2,3. Against this background, a single tool
able to provide both imaging and functional information is particularly appealing and may improve the penetration of both physiology
and imaging. Indeed, despite strong evidence coming from randomised clinical trials and registries, physiology and intracoronary
imaging are still underused, because the main barrier, more than
economic and technical issues, is the persistence of confidence in
the angio-guided approach by a significant number of operators4,5.
In the present issue of EuroIntervention, Huang et al present
a retrospective analysis to evaluate the diagnostic performance of
an optical coherence tomography (OCT)-based functional assessment (optical flow ratio [OFR
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
Lo studio COMPLETE e il futuro della rivascolarizzazione dei pazienti con infarto miocardico con sopraslivellamento del tratto ST e malattia coronarica multivasale [The COMPLETE trial and the future of revascularization in patients with ST-elevation myocardial infarction and multivessel disease]
No full textLa recente presentazione e pubblicazione dello studio COMPLETE (Complete vs Culprit-only Revascularization to Treat Multi-vessel Disease After Early PCI for STEMI) permette di aggiungere un importante tassello al trattamento ottimale dei pazienti con infarto miocardico acuto con sopraslivellamento del tratto ST (STEMI) e malattia multivasale1. Se trattare o meno con rivascolarizzazione percutanea (PCI) e impianto di stent le lesioni non responsabili dell’infarto (non culprit) riscontrate occasionalmente durante la procedura di PCI primaria è un dilemma che molteplici studi hanno cercato di affrontare2-12. Anche in un precedente numero del Giornale Italiano di Cardiologia l’argomento era stato affrontato e discusso13
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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