On the properties and evolution of binary and single neutron stars / Ralph Antoine Marie Joseph WijersThe mass-ratio distribution of binary stars / Sake Jogchum HogeveenOn the properties and evolution of proto-planetary nebulae / door Sander SlijkhuisOn gaseous discs around stars / Martinus Hubertus Maria HeemskerkA study of the fundamental properties of M-giant stars / Marc-Alexander FluksOptical variability in compact sources / Paul Joseph Groot