The unsteady flow field in a reversible pump-turbine is investigated during the continuous load rejection using a 3D computational fluid dynamic analysis.Numerical calculations are carried out using the detached eddy simulation (DES) turbulence model and a new approach involving automatic mesh motion.In this way, the instability of the flow field u
This article shows how activists in the open data movement re-articulate notions ninkasi lager of democracy, participation, and journalism by applying practices and values from open source culture to the creation and use of data.Focusing on the Open Knowledge Foundation Germany and drawing from a combination of interviews and content analysis, it a
The fossiliferous Upper Varswater Formation at Langebaanweg (South Africa) produced remains of at least five species of owls (Strigiformes).Tyto richae sp.nov.is the first palaeospecies of Tytonidae described from an African fossil site, though indeterminate remains referable to the genus Tyto are known from the Middle stomahesive protective powder