1,721,151 research outputs found
Quando proporre l'impianto cocleare
No full textLa presentazione espone le linee guida nazionali ed internazionali all'intervento di impianto cocleare e le indicazioni/controindicazioni
Otosclerosi fenestrale e cocleare a rapida evoluzione: un caso clinico
No full textViene riportato il caso di una giovane donna affetta da otosclerosi bilaterale coclearizzata e descritte le opzioni terapeutiche possibili, oltre ad una disamina della letteratura in merito alle cause di questa rara condizione
Advances in Cochlear Implantation
No full textCochlear implants (CIs) have proven to be an invaluable rehabilitative option for children and adults with severe-to-profound hearing loss, providing improved access to the acoustic environment and, especially, to speech.
The first trial of electrical stimulation of the cochlear nerve was conducted in 1953 by Djourno ed Eyries on a patient operated for chronic otitis media and facial palsy. In 1970, William House in California implanted the first single-channel stimulating electrode to an adult deaf patient, who reported he could perceive sound. Since then, the advancements in CI technology have ben continuous and comparable to “quantum leaps”: in 1984, multichannel CI were developed; strategies of speech processing were progressively improved; at the dawn of the new millennium, CIs were approved for use also in children, and they are now considered the gold standard for profound congenital bilateral hearing loss, with the age at implantation being progressively reduced. Based on the clinical outcomes, the audiological criteria for implantation are currently expanding, in adults, to asymmetric hearing losses, high-frequency losses (“ski-slope audiograms) and also to single-side deafness. Furthermore, children with additional disabilities are not excluded any longer from the opportunity to regain contact with sound.
Meanwhile, molecular genetics allowed to map more than 150 mutations responsible for isolated deafness, imaging can depict the subtle changes in the inner ear compartments, and speech training methods have evolved from language articulation to cognitive tasks based on the improved sensorial input. However, outcomes with a CI can vary significantly, owing to the several factors impacting on performance. It is imperative to address and improve each of these relevant factors, in order to maximize the benefits, that will affect the recipient across his/her lifespan
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
Un caso di persistenza dell’arteria stapedia (AS) associato ad otite media cronica ed acufene pulsante.
No full textDescrizione di un caso di arteria stapedia persistente associata ad otite media cronica ed acufene pulsante congenito.
No full textAppropriate 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
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