1,721,161 research outputs found
An innovative intrastromal keratoprosthesis surgery assisted by femtosecond laser.
No full textPurpose: To demonstrate the surgical application of a new model of epidescemetic keratoprosthesis.
Methods: A 53-year-old man was referred to our center with severe alkali burns in both eyes and was
treated by a combined corneal graft associated with KeraKlear implantation assisted by femtosecond
laser and cataract surgery with implantation of an intraocular lens.
Results: After 1 month, visual acuity was 0.6 logMAR in both eyes with −2 sphere correction. Slitlamp
examination and anterior segment optical coherence tomography revealed that the device was
centered in the pupil area with no infection. No sign of extrusion was detected.
Conclusions: The advantage of this device is that it involves nonperforating surgery, thus reducing the
postoperative risk of infection and necrosis of tissue around the prosthesis. Large-scale studies with a
long follow-up period are required to evaluate the outcome of use of this device
infectious keratitis following CXL. A systematic review of reported cases; management visual outcommes and treatment proposed
No full textAbstract Aim: To describe the infectious complications and the group of pathogens involved in the infection following corneal crosslinking, the visual outcome, and the treatment proposed. Methods: A Medline (National Library of Medicine, Bethesda, MD, USA) search from October 2000 to October 2013 was performed to identify all articles describing infectious keratitis following corneal crosslinking treatment. Nineteen articles were selected. Ten articles reported infectious complications of corneal crosslinking treatment were included. Nine articles were excluded, because seven described sterile keratitis, one article was in German, and one reported general complication without describing the infection complication. Results: A total number of infections reported included 10 eyes. The infectious keratitis was associated with bacteria in five eyes (50%): gram-positive bacteria in three eyes (30%) (staphylococcus epidermidis, S. aureus and streptococcus salivarius plus S. oralis, respectiv
Anterior segment optical coherence tomography in evaluation of severe fungal keratitis infections treated by corneal crosslinking
No full textPurpose: Anterior segment optical coherence tomography (OCT) is a relevant diagnostic tool in the
evaluation of corneal changes following corneal crosslinking (CXL) treatment in patients infected by a
severe fungal corneal infection.
Methods: Two patients with severe fungal keratitis that was unresponsive to medical treatment were
treated with CXL. Corneal melting was present in all cases. Anterior segment OCT showed the preoperative
depth and extension of the infiltrate and the modification during the follow-up.
Results: Blockage of the melting was achieved in one patient and one patient developed a corneal
perforation. Anterior segment OCT allowed control of the evolution of fungal infection and evaluation
of the corneal tissue response to the CXL. It is also able to identify the extent and depth of the inflammation.
This parameter seems more important than corneal pachymetry to ensure the safety of CXL
procedures in infectious keratitis.
Conclusions: The different behavior of infla
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
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