Introduzione, in [Meridiana : rivista di storia e scienze sociali : 92, 2, 2018].

The period between the two World Wars marks the end of mass emigration for Italy. In the course of thirty years, the migratory flows were transformed: the number of starters was reduced and the trajectories changed. The new restrictions established by immigration countries – (e.g. the Quota Acts in the Twenties) – and the advent of the fascist regime redesigned the paths of Italian emigrants. At first, Mussolini gathered the legacy of liberal governments; then, since the end of the Twenties, he inaugurated a new migration policy, in line with the demographic policy of the regime and strengthening the link between emigration and foreign policy. As the historian Bertonha wrote, emigration bec…

Sensitivity of the Cherenkov Telescope Array to spectral signatures of hadronic PeVatrons with application to Galactic Supernova Remnants

The local Cosmic Ray (CR) energy spectrum exhibits a spectral softening at energies around 3~PeV. Sources which are capable of accelerating hadrons to such energies are called hadronic PeVatrons. However, hadronic PeVatrons have not yet been firmly identified within the Galaxy. Several source classes, including Galactic Supernova Remnants (SNRs), have been proposed as PeVatron candidates. The potential to search for hadronic PeVatrons with the Cherenkov Telescope Array (CTA) is assessed. The focus is on the usage of very high energy $\gamma$-ray spectral signatures for the identification of PeVatrons. Assuming that SNRs can accelerate CRs up to knee energies, the number of Galactic SNRs whi…

Systematic review with meta-analysis: the haemodynamic effects of carvedilol compared with propranolol for portal hypertension in cirrhosis.