1,720,958 research outputs found
Transoral robotic surgery: Tongue base reduction and supraglottoplasty for obstructive sleep apnea
No full textA transoral robotic version of Chabolle's tongue base reduction with hyoid epiglottoplasty for obstructive sleep apnea syndrome is described. The main tongue base and supraglottic surgical steps are pointed out, as well as the indications and potential complications. The advantages and limits of this minimally invasive approach are discusse
Successful combined use of videolaryngoscopy and pediatric stylet in an adult case of acute epiglottitis
No full textTo the Editor:
Acute epiglottitis is a potentially life-threatening infection of the supraglottic structures, which can lead to sudden, fatal airway obstruction (1). Among children, the incidence of epiglottitis has been reduced by the introduction of vaccination against Haemophilus influenzae H. In contrast, the incidence in adults has shown a steady increase, becoming today a much more common disease (2,3). Epiglottitis in adults has many causes, and vigilance and familiarity with the clinical presentation is required for swift recognition and treatment. Non-infectious causes of epiglottitis also occur in the adult population; its onset is linked to the presence of foreign bodies, inhalation burns, inhalation of drugs, chemical burns, systemic disease, or reactions to chemotherap
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
Two-sided dorsal plus ventral oral graft bulbar urethroplasty: long-term results and predictive factors
No full textOBJECTIVE:
To evaluate long-term outcomes of the 2-sided dorsal plus ventral oral graft (DVOG) urethroplasty by preserving the narrow urethral plate in tight bulbar strictures and investigate which factors might influence long-term outcomes.
METHODS:
This is a single-center retrospective study of 166 patients who underwent DVOG urethroplasty for tight bulbar strictures by a single surgeon (E.P.) between 2002 and 2013. The strictured urethra was opened ventrally; the exposed urethral plate was incised in the midline and augmented dorsally and ventrally using 2 oral grafts. Outcome was considered a failure when any postoperative instrumentation was needed. According to stricture length, patients were classified in 3 groups as follows: ≤1.5 cm (group 1), >1.5 and ≤3.9 cm (group 2), and ≥4 cm (group 3). Time to failure was analyzed using Kaplan-Meier estimates and Cox regression.
RESULTS:
Median follow-up was 47 months (interquartile range, 33-95.5 months). Of the 166 patients, 149 (89.8%) were successful and 17 (10.2%) were failures. Most of the failures (90%) were observed during the first 5 years of follow-up; afterward, the success rate remained stable. The stricture length was a significant predictor of surgical outcome (odds ratio, 1.743 per cm; confidence interval, 1.2-2.5; P <.001); patients with a urethral stricture ≥4 cm presented a higher risk of late failure. Age, stricture etiology, and previous treatment were not significant predictors of surgical outcome.
CONCLUSION:
With long-term follow-up, the treatment of tight bulbar strictures using a 2-sided DVOG urethroplasty showed a high success rate. The stricture length is an independent predictor of failur
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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