1,720,997 research outputs found
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
Autosomal Recessive Bestrophinopahty: new Observations on the Retinal Phenotype. Clinical and Molecular Report of an Italian Family
No full textPURPOSE:
To describe the genotype and phenotype in a 9-year-old boy with bilateral retinopathy.
METHODS:
The patient, his healthy (by history) nonconsanguineous parents and his sister were examined by best-corrected visual acuity, matrix frequency doubling technology, monocular static field analysis, fundus autofluorescence imaging, optical coherence tomography, Ganzfeld electroretinography (ERG), pattern ERG, multifocal ERG, electro-oculography and genotyping of the BEST1 gene.
RESULTS:
The patient presented with an Arden ratio of 1.25, an unremarkable ERG and fluorescent yellow deposits distributed throughout the fundus suggestive of autosomal recessive bestrophinopathy (ARB). Genotyping revealed a homozygous nonsense mutation in BEST1 (p.R200X). The parents and the sister, who were heterozygous mutation carriers, presented with normal ophthalmological function.
CONCLUSIONS:
ARB is a rare retinal disorder. We contribute a novel patient report indicative of ARB, assessed by clinical examination and confirmed by genotyping of BEST1, to the short list of ARB cases in the literature
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
Efficacy of oral acetazolamide and topical dorzolamide therapy for X-linked juvenile retinoschisis maculopathy
No full textPurpose: To evaluate the response of macular cysts after treatment with acetazolamide tablet or dorzolamide eye drops in 2 brothers with juvenile X-linked retinoschisis (XLRS).
Methods: We carried out a retrospective evaluation of two brothers (four eyes) with XLRS, treated with acetazolamide tablet (375 mg daily) for three months, followed by dorzolamide 2% eye drops three times a day for further three months. The change in best-corrected visual acuity (VA) and central macular thickness (CMT; central 1 mm subfield thickness) from optical coherence tomography (OCT) was analysed over the follow-up period. Genetic analysis for mutations in the retinoschisis gene (RS1) was also performed.
Results: The age of patients at the start of treatment was 18 and 20 years, and follow-up duration was 6 months. In patient 1 CMT at the final follow-up was significantly better than at baseline (RE 563 vs 430 μm, LE 501 vs 277 μm), as well as VA (RE 3/10 (0,522 logMAR) LE 3/10 (0,522 logMAR).vs RE 6/10 (0,221 logMAR), LE 5/10 (0,301 logMAR) ); in patient 2 CMT at the final follow-up was also better than at baseline (RE 496 vs 416 μm, LE 519 vs 455 μm), hoever VA remained unchanged (RE 4/10 (0,397 logMAR) and LE 5/10 (0,301 logMAR)). Oral acetazolamide administered for three months achieved a substantial reduction of macular cysts and, to a lesser extent, of visual acuity, with no adverse effects. The topical 2% dorzolamide did not obtain a further reduction of CMT and the visual acuity was unchanged. Sequence analysis of the RS1 gene identified a hemizygous 589C>T (Arg197Cys) missense mutation in exon 6. The patients' mother was heterozygous 589C/T and also an unaffected sister was heterozygous for this mutation. This mutation has not been previously reported in Italian families with XLRS.
Conclusions: This study showed that both oral acetazolamide and topical dorzolamide have effect in reducing or stabilize central macular thickness and improve or stabilize VA in 2 patients with XLRS maculopathy associated with a hemizygous 589C>T (Arg197Cys) missense mutation in exon 6. Given the potential requirement for long term treatment, the utility of acetazolamide may be limited by potential systemic side effects, while a topical medication would be preferable for long term treatment
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