Quaternary paleoclimatic signals from the Levant have been frequently correlated with the most widely used stratigraphic divisions of high latitudes. In this article, relevant data, underlying concepts and new information are critically reviewed to highlight sources of uncertainty. Comparison between four sites from the Bekaa Valley demonstrate the problem of correlations and paleoenvironmental diversity of the region.

Severe Plastic Deformation (SPD) techniques have been used by researchers for last three decades in order to obtain Ultra-Fine Grained (UFG) materials. Equal Channel Angular Pressing (ECAP) is preferred more than other SPD techniques thanks to its high performance and practicability. Hexa Equal Channel Angular Pressing (Hexa-ECAP) – modified ECAP technique which enables to apply ECAP routes for cylindrical samples properly – was preferred in this study. Within the objective of this study, the effects of coefficient and ram velocity on the mean effective strain and strain inhomogeneity of Hexa-ECAP processed Al7075 aluminium alloy were investigated. Also, the effects of ram velocity and friction coefficient on hardness homogeneity were investigated benefitting from the similarity between the hardness distribution and the strain distribution.

Semiconducting GaN can realize high performance electronic and power devices owing to its high electron mobility and thermal conductivity where good metal-semiconductor contact is prerequisite. In this work, using thermal atomic layer deposition (ALD), ZnO interlayer was grown at 80°C on GaN and the Pt/ZnO/GaN heterojunctions were electrically characterized. The analyses on the current–voltage (I–V) and capacitance (C–V) data showed that the forward I–V conduction was involved with the inhomogeneous Schottky barrier. The higher density of interface states from I–V data than that from C–V data was attributed to nonuniform distribution of interface states. In addition, high density of interface states caused localized high electric field, caused higher Poole Frenkel emission coefficients than the theoretical one.

Il contributo ha un duplice obiettivo. Da una parte, mira a problematizzare la disomogeneità dei tratti del cosiddetto italiano neostandard, spesso presentato come un inventario monolitico di forme e fenomeni linguistici. Dall’altra, intende collocare tale varietà linguistica, nella prospettiva glottodidattica della lingua italiana, tuttora fortemente ancorata nella grammatica normativo-prescrittiva e nei canoni dell’italiano standard. Nello specifico, verranno esaminati alcuni tratti neostandard in forte espansione nell’italiano contemporaneo dal punto di vista della complessità strutturale e semantica, del valore funzionale e comunicativo e dell’estensione nell’uso odierno.