Gauge thresholds in the presence of oblique magnetic fluxes
  We compute the one-loop partition function and analyze the conditions for tadpole cancellation in type I theories compactified on tori in the presence of internal oblique magnetic fields. We check open - closed string channel duality and discuss the effect of T-duality. We address the issue of the quantum consistency of the toroidal model with stabilized moduli recently proposed by Antoniadis and Maillard (AM). We then pass to describe the computation of one-loop threshold corrections to the gauge couplings in models of this kind. Finally we briefly comment on coupling unification and dilaton stabilization in phenomenologically more viable models 
Massimo Bianchi and Elisa Trevigne (Dipartimento di Fisica and Sezione   I.N.F.N. - Universita` di Roma ``Tor Vergata'')