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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Extent of coronary artery disease and clinical outcomes with ticagrelor monotherapy versus aspirin after coronary artery bypass grafting: Insights from the TiCAB trial
No full textAbstract OBJECTIVES Patients with extensive coronary artery disease (CAD) have a higher risk of cardiovascular events. This post hoc analysis of the Ticagrelor in CABG (TiCAB) trial examined the association of ticagrelor monotherapy versus aspirin with clinical outcomes after CABG in relation to the extent of CAD. METHODS The TiCAB trial randomized CABG patients to ticagrelor (90 mg twice daily) or aspirin (100 mg daily) for 12 months. Patients were stratified by SYNTAX score terciles: low (≤22), intermediate (23–32), and high (≥33). The primary end-point was major adverse cardiac and cerebrovascular events (MACCE) at 12 months, including cardiovascular death, myocardial infarction, stroke, or repeat revascularization. Secondary end-points included individual MACCE components and major bleeding events. Cox proportional hazards models were used to assess treatment effects. RESULTS Among 752 patients, 33.4% had low, 36.0% intermediate, and 30.6% high SYNTAX scores (median 26.5 [20.0–33.0]). MACCE rates were similar across groups (low: 7.8%; intermediate: 9.2%; high: 8.8%; p = 0.87), though the incidence of repeat revascularization differed significantly among SYNTAX score groups (p = 0.02). Ticagrelor did not show a significant MACCE benefit over aspirin in any SYNTAX score group (low: HR 2.27, 95% CI 0.87–5.94; intermediate: HR 1.02, 95% CI 0.46–2.27; high: HR 1.76, 95% CI 0.70–4.46; Pint=0.41). Secondary outcomes, including bleeding, aligned with overall trial results. CONCLUSIONS This analysis did not find a differential benefit of ticagrelor versus aspirin across CAD complexity levels as measured by the SYNTAX score. Further studies are warranted to refine antiplatelet strategies for patients with complex CAD undergoing CABG
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Sex differences among patients receiving ticagrelor monotherapy or aspirin after coronary bypass surgery: A prespecified subgroup analysis of the TiCAB trial
No full textBackground
There is limited evidence on the association of sex with outcomes among patients undergoing coronary bypass surgery (CABG) and treated with ticagrelor monotherapy or aspirin.
Methods
This was a pre-specified sub-analysis of TiCAB, an investigator-initiated placebo-controlled randomized trial. Primary efficacy endpoint was the composite of cardiovascular death, myocardial infarction, stroke, or repeat revascularization 1 year after CABG. Safety endpoint was BARC type 2, 3 or 5 bleeding.
Results
A total of 280 (15.0%) women and 1579 (85.0%) men were included. Compared with men, women were older (66.1 ± 10.2 vs. 70.1 ± 9.3 years) with more acute presentation (17.0% vs 21.1%). The incidence of the primary endpoint was similar between women and men (9.2% vs. 8.9%, HR 1.08, 95%CI 0.71–1.66, P = 0.71). Cardiovascular death occurred more often in women (2.9% vs 1.0%, adjusted HR 2.87, 95%CI 1.23–6.70, P = 0.02). The incidence of bleeding was similar between the sexes (2.2% vs. 2.5%, HR 0.91, 95% CI 0.51–1.65, P = 0.77). Ticagrelor vs aspirin was associated with a similar risk of the primary endpoint in women (10.6% vs. 7.9%, HR 1.39, 95%CI 0.63–3.05, P = 0.42) and men (9.5% vs. 8.2%, HR 1.15, 95%CI 0.82–1.62, P = 0.41;pinteraction = 0.69), and a similar risk of bleeding in women (2.9% vs. 1.4%, HR 2.09, 95%CI 0.38–11.41, P = 0.40) and men (2.2% vs. 2.8%, HR 0.80, 95%CI 0.42–1.52, P = 0.49;pinteraction = 0.35).
Conclusions
Among women and men undergoing CABG, ticagrelor monotherapy was associated with a similar risk of the primary efficacy endpoint and bleeding compared with aspirin. The risk of cardiovascular death was increased in women irrespective of antiplatelet therapy
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
The ROMA trial: 7 years of trial activities and the development of the ROMA trial network
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