Digital interaction: where are we going?

In the framework of the AVI 2018 Conference, the interuniversity center ECONA has organized a thematic workshop on "Digital Interaction: where are we going?". Six contributions from the ECONA members investigate different perspectives around this thematic

On the temporal spreading of the SARS-CoV-2.

The behaviour of SARS-CoV-2 virus is certainly one of the most challenging in contemporary world. Although the mathematical modelling of the virus has made relevant contributions, the unpredictable behaviour of the virus is still not fully understood. To identify some aspects of the virus elusive behaviour, we focused on the temporal characteristics of its course. We have analysed the latency trends the virus has realized worldwide, the outbreak of the hot spots, and the decreasing trends of the pandemic. We found that the spatio-temporal pandemic dynamics shows a complex behaviour. As with physical systems, these changes in the pandemic's course, which we have called transitional stages of contagion, highlight shared characteristics in many countries. The main results of this work is that the pandemic progression rhythms have been clearly identified for each country, providing the processes and the stages at which the virus develops, thus giving important information on the activation of containment and control measures

Laser ablation methods for cultural heritage: restoration, conservation, consolidation

Scuola "Archimede" in Scienze, Comunicazione e Tecnologie, Fisica eTecnologie Quantistiche Ciclo XXVII a.a. 2014This thesis, developed in the period between March 2012 and November 2014, focuses on the researches on new methods for cleaning, diagnostics and restoration of Cultural Heritage assets. These methods are based on the use of Laser Ablation in various media (air, water and vacuum) and on different materials, such as alloys, metals and artificial stone materials. Furthermore, the thesis proposes different types of investigation, consolidation and restoration of archaeological artefacts, introducing new possible strategies of diagnostics and enhancements in the study of cultural heritage, through the contribution of nanotechnology and nanomaterials, still slightly used in the field of Cultural Heritage. The main objective of the thesis is to verify the applicability of different techniques in different environments, also trying to make the employed methodologies less invasive and more effective. In fact, a fundamental point is LA cleaning on various materials, directly in situ, using portable equipment and prototypes can be used in subaerial and underwater environments to selectively remove of crusts and deterioration patinas that often cover archaeological artifacts. The prototype has been realized during PhD and it can be used for measurements of LA cleaning and for Raman and PL spectroscopy. For testing the diagnostic methodology efficacy, the investigations were carried out by non-destructive methods on different types of materials (such as bronze, ceramics and precious metals) in different environments (subaerial and underwater), obtaining information comparable to laboratory measurements. Morphological studies were carried out using optical microscopy, Scanning Electron Microscopy SEM and Atomic Force Microscopy AFM (rarely used in Cultural Heritage). Chemical analysis were carried out with different spectroscopic techniques including X-Ray Fluorescence spectroscopy (XRF), X-ray Photoelectron Spectroscopy (XPS), PhotoLuminescence (PL), CathodoLuminescence (CL ) and finally the Energy Dispersive X-ray (EDX). Another aim concerns the study of particulate generated by LA cleaning for application in the consolidation of the artifact and high tech (photovoltaic and optoelectronic applications). Indeed, we study the production and characterization of nanoparticles and nanocomposites based on TiO2 and SiO2 for application to restoration and consolidation in archaeological artifacts, for exploring the possibility to use NPs as consolidating materials without introducing chemical, physical or esthetical changes in artifacts. Finally, our study has demonstrated that LA cleaning does not affect the Thermoluminescence measure. This thesis develops into five chapters. In the first chapter, we will introduce the LA processes, the second describes the Diagnostic techniques and experimental setup. Instead, in the third chapter we will discuss the materials analyzed, while in the fourth chapter describes the use of by-products generated from LA for consolidation of Cultural Heritage assets and for realization of nanocomposites for high-tech applications. Finally, in the fifth chapter we will conclude the study by listing the achievements.Università della Calabri

Applicazione di tecniche di datazione ed indagini diagnostiche su reperti archeologici ossei, ceramici e lapidei

Scuola "Archimede" in Scienze, Comunicazione e Tecnologie Ciclo XXVI, a.a. 2007-2013Università della Calabri

Graphene synthesis by top-down and bottom-up strategies

Dottorato di Ricerca in Fisica e Tecnologie Quantistiche Ciclo XXVIII, a.a. 2015-2016Graphene is a two-dimensional structure arranged in a hexagonal form (similar to a honeycomb) that has unique physicochemical properties and has generated interest in the scientific community for its properties and applications. To produce graphene, several methods are used, all of them can be divided in two approaches: the bottom-up approach and top-down approaches. In this work, both routes will be explored. In the bottom-up approach, the properties of graphene over a mono crystalline nickel surface obtained by chemical vapor deposition (CVD) will be studied. In the top-down approach, natural graphite will be used to construct graphene based materials with innovative approaches. Obtained products are characterized by Auger electron spectroscopy, Low energy electron diffraction, Scanning (SEM)and transmission (TEM) electron microscopy, Raman spectroscopy , X-ray photoelectron spectroscopy (XPS) and Energy electron loss spectroscopy (EELS). As a result, in the bottom-up approach, Cesium restored the linearity of the graphene and it behaved as a free-standing graphene, when is well known that exist a strong interaction between graphene and the metal substrate. In the top-down approach, graphene oxide free-defect layers that are very large and transparent were obtained. Preparated layers chemically seem to coordinate zeolite crystals probably to obtain the necessary energetic stabilization.Università della Calabri

Waves of infection and waves of communication: the importance of sharing in the era of Covid-19

No abstract availabl

Recommendations for participation in leisure-time physical activity and competitive sports of patients with arrhythmias and potentially arrhythmogenic conditions Part II: ventricular arrhythmias, channelopathies and implantable defibrillators.

Contains fulltext : 50503.pdf (publisher's version ) (Closed access)This consensus paper on behalf of the Study Group on Sports Cardiology of the European Society of Cardiology follows a previous one on guidelines for sports participation in competitive and recreational athletes with supraventricular arrhythmias and pacemakers. The question of imminent life-threatening arrhythmias is especially relevant when some form of ventricular rhythm disorder is documented, or when the patient is diagnosed to have inherited a pro-arrhythmogenic disorder. Frequent ventricular premature beats or nonsustained ventricular tachycardia may be a hallmark of underlying pathology and increased risk. Their finding should prompt a thorough cardiac evaluation, including both imaging modalities and electrophysiological techniques. This should allow distinguishing idiopathic rhythm disorders from underlying disease that carries a more ominous prognosis. Recommendations on sports participation in inherited arrhythmogenic conditions and asymptomatic gene carriers are also discussed: congenital and acquired long QT syndrome, short QT syndrome, Brugada syndrome, catecholaminergic polymorphic ventricular tachycardia, arrhythmogenic right ventricular cardiomyopathy and other familial electrical disease of unknown origin. If an implantable cardioverter defibrillator is indicated, it is no substitute for the guidelines relating to the underlying pathology. Moreover, some particular recommendations for patients/athletes with an implantable cardioverter defibrillator are to be observed