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Essays on International Migration using Big Data Analytics

How can social big data help to understand issues related to international migration? Official data such as census, survey and administrative data have been traditionally the main data source to study migration. However, these data have some limitations. They are inconsistent across different nations because countries employ different definitions of international migration and characterisations of migrants. Moreover, collecting traditional data is costly and time consuming, thus tracking...

Fibering Hyperbolic Manifolds and Hyperbolic Groups

In this thesis, we present new results regarding hyperbolic manifolds that fiber over the circle, and some consequences these have on hyperbolic groups. In particular, we construct a 5-dimensional hyperbolic manifold that fibers over the circle, and other hyperbolic manifolds ranging from dimension 4 to 8 that algebraically fiber. Our method, inspired by the work of Jankiewicz, Norin, and Wise, and relying on Bestvina-Brady theory, begins with a hyperbolic right-angled polytope. It involves a...

«Non è più tempo di stare in innazione». Economia politica e Riforme nella Venezia del secondo Settecento (1759-1791)

Incrociando storia intellettuale e storia politica, la ricerca verte sui progetti di riforma economica elaborati a Venezia nel secondo Settecento. Anzitutto, analizza il modo in cui fu interpretato l'avvento della «guerra d'industria»: per sopravvivere, Venezia doveva riscoprire le massime degli antenati e recepire emulativamente l'economia politica europa. In seguito, essa dimostra che l'economia politica fu considerata una «scienza di stato» che illuminava la legisla...

Electron and light confinement in laterally structured graphene devices

The electron liquid is a model used to study the interactions among electrons in physical systems. An example is given by graphene, a two-dimensional (2D) material in which the electron liquid is formed by massless relativistic electrons. Because of this, graphene has widely been exploited to study exotic phenomena. For example, the transmission of carriers across potential barriers in graphene is influenced by Klein tunnelling, which reduces the backscattering. Consequently, electrons in gra...

Development of computational strategies to simulate structures, reactivity and spectroscopic features of molecules at the interstellar ice interface

Molecules in space are detected through their spectroscopic signatures, and there are several telescopes scanning the Universe to capture signals from new molecules. Laboratory experiments and simulations complement observations.Computational astrochemistry provide atomistic perspectives that are difficult to achieve experimentally. The physical conditions of the ISM impose severe constraints on chemical reactivity. We re-investigated the formation process of ethanimine, a prebiotic molecule,...

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9 Tesi PhD: [927] Home page macrotipologia

Prodotti recenti

Essays on International Migration using Big Data Analytics

Fibering Hyperbolic Manifolds and Hyperbolic Groups

«Non è più tempo di stare in innazione». Economia politica e Riforme nella Venezia del secondo Settecento (1759-1791)

Electron and light confinement in laterally structured graphene devices

Development of computational strategies to simulate structures, reactivity and spectroscopic features of molecules at the interstellar ice interface

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Disciplina SNS