PhD Graduate in ASTRONOMY ASTROPHYSICS AND SPACE SCIENCE XXXIV JAVIER CARRON DUQUE co-supervisor: N. Vittorio JULIANA CRESTANI RIBEIRO DE SOUZA co-supervisor: Giuseppe Bono ANDREA D'AMBROSIO co-supervisor: F. Curti RICCARDO FERRAZZOLI co-supervisor: P. Soffitta FLAMINIA FORTUNI co-supervisor: Adriano Fontana WILLIAM GIARÈ co-supervisor: A. Melchiorri LORENZO MELE co-supervisor: Silvia Masi SABRINA MORDINI LORENZO MUGNAI co-supervisor: Enzo Pascale MARIA GABRIELA NAVARRO OVANDO AJAY RATHEESH LORENZO ROBERTI co-supervisor: Marco Limongi FEDERICA SASSANO XXXII ANNA SILVIA BALDI STEFANO CARLETTA RAFFAELE STEFANO CATTOLICO FABIO COLUMBRO NAZANIN DAVARI ANG LIU ALESSIO MARINO FABRIZIO RENZI VALERIO ROSCANI PIETRO SCARICA MARIANNA TORELLI ANDREA TRAVASCIO GIORGIO VIAVATTENE