1,721,510 research outputs found
Localising re-entry in atrial fibrillation: Anatomical clues to the substrate of rotors
No full textAnand N. Ganesan, Prashanthan Sander
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
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
Primary Deep Sclerectomy in Open-Angle Glaucoma: Long-Term Outcomes and Risk Factors for Failure
No full textPurpose: To report long-term outcomes of primary deep sclerectomy (DS) in open-angle glaucoma (OAG) and identify factors influencing surgical failure and postoperative complications. Design: Retrospective cohort study. Participants: Consecutive OAG patients undergoing primary DS with follow-up of 1 year or more. Methods: Three intraocular pressure (IOP) success cutoffs were defined: 18 mmHg or less and 20% reduction, 15 mmHg or less and 25% reduction, and 12 mmHg or less and 30% reduction. Cox multivariable regression analysis investigated factors influencing failure and postoperative complications. Main Outcome Measures: The primary outcome was the success rate of DS according to the defined criteria. Secondary outcomes included IOP over time and factors predictive of failure. Results: Five hundred thirteen eyes of 409 patients with a mean age ± standard deviation (SD) of 70.2 ± 9.8 years and follow-up of 84.1 ± 41.6 months. Mean ± SD IOP decreased from 23.5 ± 7.3 mmHg to 13.3 ± 3.9 mmHg, 12.8 ± 4.3 mmHg, and 12.4 ± 4.3 mmHg at 3, 5, and 7 years, respectively (P < 0.001). Success rates at 3, 5, and 7 years were 66.3% (95% Confidence Interval [CI] 62.2%–70.7%), 57.9% (95% CI 53.4%–62.7%), and 54.0% (95% CI 49.4%–59.1%), respectively, for IOP of 18 mmHg or less; 44.5% (95% CI 40.3%–49.1%), 34.6% (95% CI 30.4%–39.4%), and 29.8% (95% CI 25.6%–34.6%), respectively, for IOP of 15 mmHg or less; and 18.1% (95% CI 15.0%–21.9%), 11.9% (95% CI 9.2%–15.4%), and 10.0% (95% CI 7.5%–13.4%), respectively, for IOP of 12 mmHg or less. For all cutoffs, laser goniopuncture (P < 0.001), needling (P < 0.001), and postoperative antiglaucoma medications (P < 0.001) were associated with increased failure. Intraoperative mitomycin C (MMC) was associated with reduced failure for IOP of 15 mmHg or less (P = 0.006) and IOP of 12 mmHg or less (P = 0.001), whereas higher preoperative IOP (P = 0.001) with increased failure for IOP of 12 mmHg or less. Conclusions: Deep sclerectomy is an effective, long-lasting primary surgical procedure for OAG. Intraoperative MMC enhances survival, whereas higher preoperative IOP and postoperative maneuvers are predictors of increased failure
Laser goniopuncture after deep sclerectomy: incidence, long-term outcomes and risk factors for failure
No full textAims To report the incidence, risk factors and long-term outcomes of laser goniopuncture (LGP) in patients with previous deep sclerectomy (DS). Methods Retrospective cohort study of 1765 eyes (1385 patients) undergoing DS with or without cataract surgery between 2001 and 2020 in two UK institutions. Kaplan-Meier was used to estimate LGP incidence. DS success after LGP was calculated for criteria A, B, and C defined as intraocular pressure (IOP) of ≤18, ≤15 and ≤12 mm Hg with 20%, 25% and 30% reduction, respectively. Cox regression was used to investigate factors associated with the risk of failure. Results LGP had an estimated incidence of 33.3% (30.9%-35.6%), 56.3% (53.5%-58.9%) and 62.8% (59.7%-65.6%) at 1, 3, 5 years, respectively. Mean (±SD) IOP significantly (p<0.001) decreased from 21.2 (±6.0) mm Hg pre-LGP to 13.8 (±5.2) mm Hg and 12.9 (±4.7) mm Hg at 3 and 5 years post-LGP, respectively. Success rates at 3 and 5 years were, respectively, 40.9% (37.5%-44.6%) and 33.7% (30.3%-37.6%) for criterion A; 27.1% (24.0%-30.5%) and 22.3% (19.3%-25.7%) for criterion B and 13.9% (11.6%-16.7%) and 11.6% (9.5%-14.3%) for criterion C. In all models, higher pre-LGP IOP (p<0.001) and higher pre-LGP medication number (p<0.001) were associated with increased failure, while male gender (p≤0.004), intraoperative mitomycin C (p≤0.031), longer interval between DS and LGP (p≤0.01) with reduced failure. Conclusion Most patients undergoing DS will eventually require LGP. LGP is effective at rescuing eyes with a failing DS. This study identifies several factors associated with LGP outcomes, knowledge of which may help clinicians predict LGP success
- …
