On the Iitaka fibration of varieties of maximal Albanese dimension

We prove that the tetracanonical map of a variety $X$ of maximal Albanese dimension induces the Iitaka fibration. Moreover, if $X$ is of general type, then the tricanonical map is birational.Comment: to appear in IMR

Le attività del centro Altreitalie e lo sviluppo degli studi sulle migrazioni italiane nelle Americhe

The article presents the history of the Centro Altreitalie, born within the Giovanni Agnelli Foundation in the eighties, and its role in the development of Italian migration studies and researches overseas. It will focus on the activities carried out in Latin America, the first area of investigation at the dawn of Italian migration studies abroad. Today, within the association Globus et Locus, the Centro Altreitalie continues to support and disseminate research results through the journal Altreitalie. Among the most recent publications: Guido Tintori, (ed.) Il voto degli altri, on the Italian vote abroad; Maddalena Tirabassi, Le piemontesi in Argentina; Maddalena Tirabassi and Alvise Del Pra', La meglio Italia, on the new Italian migrations

Derived Categories of Toric Fano 3-Folds via the Frobenius Morphism

In a work of Costa and Mir\'{o}-Roig state the following conjecture: Every smooth complete toric Fano variety has a full strongly exceptional collection of line bundles. The goal of this article is to prove it for toric Fano 3-folds

A non-Gaussian puff model

A model for the dispersion of passive non-Gaussian puffs is presented. The model is based on a general technique for solving the K-equation on the basis of the truncated Gram-Charlier expansion of the concentration field. The model performances are evaluated against experimental ground-level concentrations, using meteorological data collected near the ground

Sensitivity analysis of an operational advanced Gaussian model to different turbulent regimes

A non-reactive air pollution model evaluating ground level concentration is presented. It relies on a new Gaussian formulation (LUPINI R. and TIRABASSI T., J. Appl. Meteor., 20 (1981) 565-570; TIRABASSI T. and RIZZA U., Atmos. Environ., 28 (1994) 611-615) for transport and vertical diffusion in the Atmospheric Boundary Layer (ABL). In this formulation, the source height is replaced by a virtual height expressed by simple functions of meteorological variables. The model accepts a general profile of wind u(z) and eddy diffusivity coefficient Kz . The lateral dispersion coefficient is based on Taylor’s theory (TAYLOR G. I., Proc. London Math. Soc., 20 (1921) 196-204). The turbulence in the ABL is subdivided into various regimes, each characterized by different parameters for length and velocity scales. The model performances under unstable conditions have been tested utilizing two different data sets

A study of the air-sea interaction in the South Atlantic Convergence Zone through Granger causality

Air-sea interaction in the region of the South Atlantic Convergence Zone (SACZ) is studied using Granger causality (GC) as a measure of directional coupling. Calculation of the area weighted connectivity indicates that the SACZ region is the one with largest mutual air-sea connectivity in the south Atlantic basin during summertime. Focusing on the leading mode of daily coupled variability, GC allows distinguishing four regimes characterized by different coupling: there are years in which the forcing is mainly directed from the atmosphere to the ocean, years in which the ocean forces the atmosphere, years in which the influence is mutual and years in which the coupling is not significant. A composite analysis shows that ocean-driven events have atmospheric anomalies that develop first and are strongest over the ocean, while in events without coupling anomalies develop from the continent where they are strongest and have smaller oceanic extension.Peer ReviewedPostprint (author's final draft