1,721,049 research outputs found
Photoelectronic properties of synthetic melanins
No full textMelanins are ubiquitous natural pigments, formed by oxidation and polymerization of catechols, whose absorption spectra increase monotonically from 700 to 250 nm. An investigation of their optical and photoelectric properties, reported here, shows that melanins can be described as an amorphous network of nanometre-sized conjugated clusters, where photogenerated electron-hole pairs undergo either geminate recombination or dissociation, depending on the photon energy
n+-SnO2/a-SiC:H/Metal Thin Film Photodiodes with Voltage-Controlled Spectral Sensitivity
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Gap Density of States in CVD Diamond Films from Photoconductivity and Photoluminescence Data
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Photoelectrical Characteristics of Diamond UV Detectors: Dependence on Device Design and Film Quality
No full textThe assessment of children with suspected laryngopharyngeal reflux: an otorhinolaringological persepective
No full textThe assessment of pediatric laryngopharyngeal reflux (LPR) is controversial. Otorhinolaryngologists may play a role in the evaluation of children with suspected LPR detecting typical airway endoscopic findings and/or associated diseases and may help in the selection of children to be subjected to further instrumental tests. In this perspective the present review aims at examining the available evidence in the literature regarding the assessment of LPR in children. After careful literature search there are no current validated symptoms assessment questionnaires for LPR evaluation in children; flexible fiberoptic nasopharyngolaryngoscopy remains controversial as a diagnostic tool in suspect LPR cases; even though the multichannel intraluminal impedance with pH monitoring has been proposed as the instrumental gold standard, further evidence need to be found for validation in children with typical features of LPR
Response to the letter "Potential role for drug induced sleep endoscopy (DISE) in pediatric OSA"
No full textGoing 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
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