Search results for "Epos"
showing 10 items of 1649 documents
Qui Exsitum Parentes Dederunt : a formulation in prose of the immatura (praepostera) mors topos on a roman inscription in ager Tarraconensis (Renau, …
2016
Mediante un análisis gráfico y lingüístico y examinando la tradición de la epigrafía latina sepulcral, la frase con la que concluye esta inscripción, y que no pertenece al formulario habitual de la epigrafía en prosa, se interpreta como una formulación del tópico de la immatura (praepostera) mors Not only the graphic and linguistic analysis, but also the typical tradition in Latin sepulchral inscriptions, suggest that the final sentence, which does not belong to the usual form epigraphy prose, should be interpreted as a formulation of the immatura (praepostera) mors topos
In situ micro-Raman and X-ray diffraction study of diamonds and petrology of the new ureilite UAE 001 from the United Arab Emirates
2008
International audience; A new olivine-pigeonite ureilite containing abundant diamonds and graphite was found in the United Arab Emirates. This is the first report of a meteorite in this country. The sample is heavily altered, of medium shock level, and has a total weight of 155 g. Bulk rock, olivine (Fo79.8-81.8) and pyroxene (En73.9-75.2, Fs15.5-16.9, Wo8.8-9.5) compositions are typical of ureilites. Olivine rims are reduced with Fo increasing up to Fo96.1-96.8. Metal in these rims is completely altered to Fehydroxide during terrestrial weathering. We studied diamond and graphite using micro-Raman and in situ synchrotron X-ray diffraction. The main diamond Raman band (LO=TO mode at ~1332 c…
La qualità inclusiva della scuola: dalle pratiche didattiche alla formazione degli insegnanti.
2017
Lo scenario nazionale ed internazionale si sta muovendo verso una scuola inclusiva. L’attenzione della ricerca pedagogica viene posta sui fattori chiave dei processi di inclusione: la formazione degli insegnanti, lo sviluppo ed il monitoraggio dei contesti educativi nonché la produzione e l’incremento di pratiche didattiche inclusive. La ricerca è stata divisa in due momenti: ha coinvolto nella prima fase 853 insegnanti in servizio e 1651 alunni frequentanti la scuola primaria presso le scuole del territorio siciliano; nella seconda fase sono stati coinvolti 22 insegnanti e le loro relative classi di 3 scuole primarie di Palermo e provincia.
Qualità inclusiva della scuola e formazione degli insegnanti a supporto di alunni con Bisogni Educativi Speciali
2016
L’acceso dibattito aperto ormai da diversi anni sulle tematiche legate al processo inclusivo nella scuola a livello nazionale ed internazionale, rappresenta lo sfondo dal quale parte e si sviluppa il presente lavoro di ricerca. Il contesto di riferimento dello studio è stato la Scuola Primaria in generale, scisso in due luoghi specifici: le scuole del territorio siciliano in cui svolgono il proprio agire educativo gli insegnanti in servizio; il Corso di Laurea in Scienze della Formazione Primaria per i docenti in formazione.
L'habitat néolithique récent de Geispolsheim "Forlen" (Bas-Rhin) : contribution à la périodisation de la culture de Munzingen et à l'étude de ses rel…
2011
The recent Neolithic site of Forlen in Geispolsheim, attributed to the recent Munzingen, has yielded a series of enclosures containing ceramic forms unprecedented in the context of Munzingen B. We have detected the influence of late productions by the Pfyn culture and propose the identification of a new stage in the recent Munzingen, which we have unoriginally named Munzingen C, and is typified by the appearance of ceramic forms with rounded profiles. This episode may date from around 3650-3550 BC, a late dating that has been confirmed by two carbon 14 tests. The discovery allows a strong claim to be made that ancient trading networks that linked the Rhine Valley with the Swiss Plateau and …
Cathodoluminescence and photoluminescence study of trap centers in amorphous silicon oxynitride
2002
Amorphous silicon oxynitride (a-SiO/sub x/N/sub y/) films with different compositions were prepared using low-pressure chemical vapor deposition (LPCVD) technique, The cathodoluminescence and photoluminescence of this samples were measured from the red band to the ultraviolet band to study the trap centers in silicon oxynitride. A 1.8-1.9 eV band was found and is attributed to the oxygen and nitrogen atoms with unpaired electrons whereas the 2.7 eV band is attributed to two-fold coordinated silicon atoms with two electrons. The 5.4 eV shoulder is due to the peroxy radicals and other ultraviolet bands are supposed to due due to the Si-Si bonds.
Anomalous and normal Hall effect in hydrogenated amorphous Si prepared by plasma enhanced chemical vapor deposition
2010
The double sign anomaly of the Hall coefficient has been studied in p -doped and n -doped hydrogenated amorphous silicon grown by plasma enhanced chemical vapor deposition and annealed up to 500 °C. Dark conductivity as a function of temperature has been measured, pointing out a conduction mechanism mostly through the extended states. Anomalous Hall effect has been observed only in the as-deposited n -doped film, disappearing after annealing at 500 °C, while p -doped samples exhibit normal Hall effect. When Hall anomaly is present, a larger optical band gap and a greater Raman peak associated with Si-H bond are measured in comparison with the cases of normal Hall effect. The Hall anomaly wi…
Atomic Layer Deposition of Aluminum Oxide on TiO2 and Its Impact on N3 Dye Adsorption from First Principles
2011
The atomic layer deposition of aluminum oxide on an OH-terminated TiO2(101) anatase surface was studied employing density functional theory calculations. The formation of the Al2O3−TiO2 interface during the first atomic layer deposition cycle was modeled by studying the dissociative adsorption of an Al(CH3)3 precursor, followed with a H2O-pulse reaction step that changes the surface termination. Calculations provide evidence for the formation of a discontinuous, atomically rough aluminum oxide layer after the first cycle. To explore the role of the aluminum oxide layer on adsorption of a ruthenium-based N3 dye molecule, various adsorption geometries were investigated. Calculations show that…
Investigation of Activities for Pt-M Bimetallic Nanoparticles Catalysts on the Oxygen Reduction Reaction
2015
Bi-metallic Pt3Ni/C and Pt3Co/C electrocatalysts were successfully synthesized by a solvent free chemical vapour deposition method with a narrow particle size distribution. The results showed that the electrochemical surface area was increased by adding the additional Ni or Co to a pure Pt catalyst. Pt3Ni/C catalyst exhibited a significant enhancement of oxygen reduction reaction activity. The catalysts were characterized by EDS, XRD, HRTEM and electrochemical activity was determined using cyclic voltammetry.
Influence of oxide substrates on monolayer graphene doping process by thermal treatments in oxygen
2019
Abstract The structural and the electronic properties of monolayer graphene made by chemical vapor deposition and transferred on various oxide substrates ( SiO 2 , Al 2 O 3 , and HfO 2 ) are investigated by Raman Spectroscopy and Atomic Force Microscopy in order to highlight the influence of the substrate on the features of p-doping obtained by O 2 thermal treatments. By varing the treatment temperature up to 400 °C, the distribution of the reaction sites of the substrates is evaluated. Their total concentration and the consequent highest doping available is determined and it is shown that this latter is linked to the water affinity of the substrate. Finally, by varing the exposure time to …