1,720,955 research outputs found
The role of hearing preservation on electrical thresholds and speech performances in Cochlear Implantation
No full textIntroduction.
Candidacy criteria for cochlear implantation have evolved including patients with more
residual hearing. The purpose of this study was therefore to verify the correlation
between preservation of residual hearing after classic cochlear implantation in adult,
electrical thresholds and speech performances.
Matherials and Methods.
41 patients with CI were involved in our study. They were subdivided into 2 groups
according to the average pre-operative hearing loss at the frequencies of 125 and 250
Hz (low frequency pure tone average- LFPTA). Group A included 21 patients with a
mean LFPTA ≤ 90 dB HL; Group B included 20 patients with a mean LFPTA > 90 dB
HL. They underwent 12 months follow up after cochlear implantation, including
standard audiological investigation, speech discrimination tests and electrical
measurements.
Results.
No significant differences were found in speech perception tests among groups. In
Group A hearing was preserved in 8 (group A1) and was lost in 13 patients (group A2);
the postoperative LFPTA was significantly better (p < 0,0001) in A1. Group A1 patients
present significantly higher C values (p < 0,0001) than the other two groups and the
dynamic range was therefore significantly wider (p<0,001).
Discussion.
Preservation of residual hearing should be attempted in all cases. In fact, although
effects on the speech perception are not evident with the standard evaluation, larger
electrical dynamic range can be achieved and may represent a sign of cochlear "wellbeing"
potentially allowing a more complex electric stimulation of the nerve
Children with cochlear implants: cognitive skills, adaptive behaviors, social and emotional skills.
No full textOBJECTIVE: The aim of this study is to examine cognitive skills, adaptive
behavior, social and emotional skills in deaf children with cochlear implant (CI)
compared to normal hearing children.
METHODS: The study included twenty children affected by profound hearing loss
implanted with a CI compared to 20 healthy children matched to chronological age
and gender.
RESULTS: Results of this study indicated that 55% of children with CI showed a
score in the normal range of nonverbal intelligence (IQ > 84), 40% in the
borderline range (71 < IQ < 84) and 5% were in mild range(50 < IQ < 70). No
significant differences were found after comparison with normal hearing
children.Children with CI reported more abnormalities in emotional symptoms (p =
.018) and peer problems(p = .037) than children with normal hearing. Age of CI
was negatively correlated with IQ (p = .002),positively correlated with emotional
symptoms (p = .04) and with peer problems (p = .02).
CONCLUSIONS: CI has a positive effect on the lives of deaf children, especially
if it is implanted in much earlier ages
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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