Search results for "sperimentale"

Partnership for training. Genitori, docenti e dirigenti a confronto. Strumenti e modelli di valutazione

2022

This paper focuses on the need to work on co-responsability between school and family. This aim is developed assuming that a growing interest on quality schools involves the construction of significant alliances. Building a common "Pact" between these two important educational agencies means increasing a global and meaningful development of the students. The Ecological systems theory explains how the child, on his path of bio-psycho-social maturation, is constantly influenced by different and interdependent "systems", which simultaneously exert their effect over the child. In view of this natural interdependence, the school-family alliance becomes a pivot upon which to base the pact of co-r…

High-Resolution 3-D CZT Drift Strip Detectors for Prompt Gamma Ray and Neutron Detection in BNCT

2021

Spectroscopic imagers based on high-Z and wide-bandgap compound semiconductor detectors are widely proposed for the detection of prompt gamma rays in boron neutron capture therapy (BNCT). BNCT is a therapy based on the neutron capture reaction 10B (n,α)7Li. To perform a real-time monitoring of the spatial distribution of 10B during the treatments, the detection of the prompt gamma rays (478 keV), produced by the 7Li recoil nuclei, can be helpful. In this work, we presented the potentialities of new high-resolution CZT drift strip detectors, recently developed by our group, for BNCT measurements. The detectors, exploiting the analysis of the collected-induced charge pulses from anodes, catho…

Il progetto Nessuno resta indietro: formazione alla ricerca didattica

2022

La chiusura delle scuole che ha provocato un incremento significativo della povertà educativa ha sollecitato l’opportunità di progettare interventi integrati di service learning per favorire il recupero e il potenziamento dei minori in difficoltà. 869 studenti del Corso di Laurea Magistrale in Scienze della Formazione Primaria dell’Università degli Studi di Palermo, sono stati coinvolti nella progettazione e nella realizzazione di percorsi didattici mirati, rivolti agli alunni “fragili” di 33 scuole palermitane. Complessivamente sono state erogate 60,000 ore in DAD di attività di recupero e di potenziamento dell’apprendimento di alunni della scuola primaria di Palermo. Le attività didattich…

Deep-learning based reconstruction of the shower maximum X max using the water-Cherenkov detectors of the Pierre Auger Observatory

2021

The atmospheric depth of the air shower maximum $X_{\mathrm{max}}$ is an observable commonly used for the determination of the nuclear mass composition of ultra-high energy cosmic rays. Direct measurements of $X_{\mathrm{max}}$ are performed using observations of the longitudinal shower development with fluorescence telescopes. At the same time, several methods have been proposed for an indirect estimation of $X_{\mathrm{max}}$ from the characteristics of the shower particles registered with surface detector arrays. In this paper, we present a deep neural network (DNN) for the estimation of $X_{\mathrm{max}}$. The reconstruction relies on the signals induced by shower particles in the groun…

Stability of sol-gel silica glass for CPV and ultraviolet LED applications

2011

This paper concerns the characterization of silica glass obtained by a sol-gel technique as to its suitability in the terrestrial and space concentrated photovoltaic (CPV), and ultraviolet light emitting diode (UV LED) industrial sectors. The sol-gel material tested is produced by Evonik Industries and marketed under the brand name SAVOSIL™. The tests performed were aimed at determining the endurance of the material to radiation exposure and consist of exposure to gamma radiation and 355 nm UV laser light. In these tests the transmittance of the glass was measured before and after the exposure to the radiation to determine the effect of the radiation treatment. In the case of the test with …

Resonance Raman of oxygen dangling bonds in amorphous silicon dioxide

2017

We investigate the origin of a resonance Raman band induced by ionizing radiation in amorphous silicon dioxide (silica glass), which can be detected under ultraviolet laser excitation. A silica sample, rich of oxygen-excess related defects, was prepared by treating some length of a pure-silica-core multimode fiber in an O2 atmosphere (at high temperature and pressure) and by irradiating it with X-rays at 10 MGy(SiO2) dose. A micro-Raman study revealed a gaussian band peaking at 896 cm−1 with a full width at half maximum of 32 cm−1, which could be detected by exciting the sample with the 325-nm line of a HeCd laser. This spectral feature is absent in the Raman spectra performed with the 442-…

Comparison of gamma and beta-ray irradiation effects in sol-gel Ge-doped SiO2

2009

Effects of Excimer Laser Irradiation on the Morphological, Structural, and Electrical Properties of Aluminum-Implanted Silicon Carbide (4H-SiC)

2022

This paper reports on the effects of excimer laser irradiation on an aluminum (Al)-doped silicon carbide (4H-SiC) layer. Specifically, high-concentration (1 × 1020at/cm3) Al-implanted 4H-SiC samples were exposed to a few pulses of 308 nm laser radiation (pulse duration of 160 ns), with fluence varying from 1.0 to 2.8 J/cm2. As a starting point, the laser-induced modifications of the morphological, microstructural, and nanoelectrical properties of the exposed 4H-SiC surface were monitored by combining different techniques. From these investigations, an evolution of the surface morphology was observed that can be ascribed to a conversion during irradiation of the uppermost part of the 4H-SiC …

Consapevolmente intelligenti: un’indagine esplorativa sull’uso dei social network nella scuola primaria

2017

Abstract – Social Networks are a noteworthy opportunity to build a more caring and responsible society, a practice that is assimilated by learning to use the Web in a conscious way. The media competence takes the form of expertise both to active participation to the Web and to society. The focus is on the need to acquire the know-how to exploit the media, with particular reference to social networks, in a clever way so as to make them intelligent instruments. From an educational point of view, Social Networks offer a different potential because they are able to support the functions of socialization, of sharing and of coordination; to encourage dialogue, promote resources sharing and improv…

Social network, texting e solitudini verbali. L’analisi linguistico-espressiva delle interazioni tra gli studenti universitari su fb

2019

Nowadays, social platforms play a leading role in the ways of social communication and knowledge building. Young people are the main recipients and users of these means, both with positive effects in the learning and cognitive field and also with negative consequences in the social-relational field. Considered in terms of linguistic-communicative analysis, when used in the teaching do-main, social networks have both the advantage of providing ac-cessible corpora of conversational exchanges and that of contin-uously re-proposing the operational and pragmatic centrality of the subject/user. Starting from the parallel between the models of real conver-sation and the realizations of virtual com…