Search results for "OLED"
showing 10 items of 349 documents
IL VICERÉ GARÇIA DE TOLEDO E I CANTIERI REALI. UN LOGGIATO “ALLA GENOVESE” PER PALERMO
2014
The State Archive of Genoa keeps one of the few drawings related to the reconfiguration projects of the Royal Palace of Palermo in modern age. It's a pen drawing, partly in watercolor, depicting partially the front and the pavement of a long open gallery to be realized in the new eastern façade of the palace; the plan is attached to the contract, signed March 14th 1567 in Genoa, where the sculptors Giacomo Guidetti and Antonio Carabio were commissioned to supply all the necessary marbles and floor surfaces to realize the loggia.
Sex differences in the prevalence of Helicobacter pylori infection: an individual participant data pooled analysis (StoP Project)
2019
Background Helicobacter pylori (H. pylori) infection is more frequent among men, though the magnitude of the association might be inaccurate due to potential misclassification of lifetime infection and publication bias. Moreover, infection is common, and most studies are cross-sectional. Thus, prevalence ratios (PRs) may be easier to interpret than odds ratios (ORs). Aim The aim of this study was to quantify the association between sex and H. pylori infection using controls from 14 studies from the Stomach Cancer Pooling (StoP) Project. Participants and methods H. pylori infection was defined based on IgG serum antibody titers or multiplex serology. Participants were also classified as infe…
A comprehensive fracture prevention strategy in older adults : The European union geriatric medicine society (EUGMS) statement
2016
Published also in Aging Clinical and Experimental Research, Vol.28, No.4, WOS: 000379034800030 Prevention of fragility fractures in older people has become a public health priority, although the most appropriate and cost-effective strategy remains unclear. In the present statement, the Interest group on falls and fracture prevention of the European union geriatric medicine society (EUGMS), in collaboration with the International association of gerontology and geriatrics for the European region (IAGG-ER), the European union of medical specialists (EUMS), the Fragility fracture network (FFN), the International osteoporosis foundation (IOF) - European society for clinical and economic aspects …
The diagnostic significance of cholescintigraphy and ultrasound examination in cholestatic syndromes in infancy
1988
Thirty-three neonates and infants with cholestatic syndromes of various etiologies were evaluated by cholescintigraphy and ultrasound examinations. The results of these two diagnostic procedures were compared with the final diagnosis as confirmed by liver biopsy and/or laparotomy and the clinica follow-up of the infants. Fourteen patients had an obstructive cholangiopathy (11 biliary atresia, 2 choledochal cysts, 1 congenital choledochal stenosis), 13 had neonatal hepatitis, and 6 had cholestasis of another etiology. Typical ultrasonic and/or scintigraphic findings confirmed or excluded the need for surgical exploration in 28 patients. Thus, for must infants with cholestatic syndromes it is…
Parametric thermal analysis for the optimization of Double Walled Tubes layout in the Water Cooled Lithium Lead inboard blanket of DEMO fusion reactor
2019
Abstract Within the roadmap that will lead to the nuclear fusion exploitation for electric energy generation, the construction of a DEMOnstration (DEMO) reactor is, probably, the most important milestone to be reached since it will demonstrate the technological feasibility and economic competitiveness of an industrial-scale nuclear fusion reactor. In order to reach this goal, several European universities and research centres have joined their efforts in the EUROfusion action, funded by HORIZON 2020 UE programme. Within the framework of EUROfusion research activities, ENEA and University of Palermo are involved in the design of the Water-Cooled Lithium Lead Breeding Blanket (WCLL BB), that …
A simple method for the photometric characterization of organic light-emitting diodes
2022
A simple method for the photometric characterization of organic light-emitting diodes (OLEDs) is reported. It is based on the indirect measurement of the total emitted optical power by using a calibrated photodiode and the optical emission spectrum and space emission diagram of the OLED. From this and by measuring the current–voltage characteristic of the OLED all the relevant radiometric and photometric quantities can be extracted, including the external quantum efficiency. The usual method to collect all photons emitted by a LED source in the half space uses an integrating sphere with the LED source placed at the entrance hole and a photodiode (PD) placed at an exit hole at some point on …
Komplicētas žultsakmeņu slimības iznākumi pēc endoskopiskās retrogrādās holangiopankreatogrāfijas
2019
Endoskopiskā retrogrādā holangiopankreatogrāfija (ERHP) ir visjutīgākā un efektīvākā diagnostikas un ārstēšanas metode pankreatobiliārās sistēmas slimībām. Tomēr kā jebkura invazīva procedūra, ERHP var radīt nopietnas komplikācijas, kuras var būt saistītas ar pašas procedūras tehniku vai tās laikā pielietoto sedāciju. Kā piemēru var minēt ar pašu procedūru saistītās - post-ERHP pankreatītu un asiņošanu. Holedoholitiāzes gadījumā ERHP ir būtiska ārstēšanas metode. Darba hipotēze bija - pacientiem ar holedoholitiāzi bez citām žultsakmeņu slimības komplikācijām hospitalizācijas dienu skaits ir mazāks un ERHP komplikāciju risks zemāks. Pētījuma mērķis bija salīdzināt ar ERHP saistītu komplikāci…
Hybrid organic-inorganic Light Emitting Diodes
2013
Hybrid organic inorganic light emitting diodes are nowadays attracting great attention due to their intrinsic air stability and solution processability, which could result in low-cost, large area, light emitting devices. Despite the fact that high luminance values have been already demonstrated in recent publications, the efficiency of HyLEDs has been limited by its peculiar hole-dominated electronic mechanism. In particular, the electron injection is promoted by the hole accumulation at the metal oxide EIL/organic interface, but at the same time this mechanism leads to limits the device efficiency. It is known from the research in OLEDs that when the recombination zone is close to an inter…
Optimized search strategy for detecting scientifically strong studies on treatment through PubMed.
2011
OBJECTIVE: To develop optimal MEDLINE search strategies for retrieving sound clinical studies of the etiology, prognosis, diagnosis, prevention, or treatment of disorders in adult general medicine. DESIGN: Analytic survey of operating characteristics of search strategies developed by computerized combinations of terms selected to detect studies meeting basic methodologic criteria for direct clinical use in adult general medicine. MEASURES: The sensitivities, specificities, precision, and accuracy of 134,264 unique combinations of search terms were determined by comparison with a manual review of all articles (the "gold standard") in ten internal medicine and general medicine journals for 19…
Identifying lifetime as one of the key parameters responsible for the low brightness of lanthanide-based OLEDs.
2021
OLEDs based on lanthanide complexes have decisive optical advantages but are hampered by low brightness. Despite the efforts to optimize several parameters such as quantum yield and charge carrier mobility, there seems to be another key parameter that hinders their performances. Experimental data are therefore collected for mixed-ligand europium complexes with bathophenanthroline and different classes of anionic ligands and screened to identify the key parameter responsible for this situation, which turns out to be the long lifetime of their excited states. A broad literature search supports this conclusion, showing that lanthanide complexes are inferior to other classes of OLED emitters of…