Oxygen vacancies in ZnO Oxygen Vacancies and Catalysis on Ceria Surfaces Gallium vacancies and the yellow luminescence in GaN The role of vacancies and local distortions in the design of new phase-change materials. The Cyclical Behavior of Equilibrium Unemployment and Vacancies Short-Run Equilibrium Dynamics of Unemployment, Vacancies, and Real Wages Oxygen vacancies in transition metal and rare earth oxides: Current state of understanding and remaining challenges Correlation between photoluminescence and oxygen vacancies in ZnO phosphors The Cyclical Behavior of Equilibrium Unemployment and Vacancies – A Comment Visible-light-driven photocatalysis on fluorine-doped TiO 2 powders by the creation of surface oxygen vacancies