INFN CSN3 awarded the Villi prize for the best doctoral thesis in nuclear physics in 2015 to Caterina Michelagnoli, author of a thesis titled: "The lifetime of the 6.79 MeV state in 15O as a challenge for nuclear astrophysics and gamma ray spectroscopy: a new DSAM measurement with the AGATA demonstrator array ", carried out in collaboration with the INFN section and the University of Padua and with the National Laboratories of Legnaro.