Aeration devices are introduced along chute spillways and at bottom outlets to prevent cavitation damage in high velocity flows. Bottom aerators are characterised by large quantities of air entrained along the jet interfaces but also by a strong de-aeration process near the impact of the water jet with the spillway bottom. In this paper, the aeration and de-aeration occurring respectively in th...

Adv. Funct. Mater. 2020, 30, 2000537 DOI: 10.1002/adfm.202000537 The originally published article contains an error in the images for V group, scale bar, and caption Figure S11. correct S11 is as follows: arguments conclusions of original are not affected. authors apologize any inconvenience caused. Please note: publisher responsible content or functionality supporting information supplied by a...

The stepped channel design have been used since more than 3,000 years. It is understood that low flows behave as successions of free-jets (i.e. nappe flow) while large discharges skim over the pseudo-bottom formed by the step edges. For a range of intermediate flow rates, a transition flow regime takes place. The dominant feature is stagnation on the horizontal step face associated with signifi...

Stepped block protection has considerable potential as a low-cost method for the construction of chute spillways and the protection of embankments from erosion by overtopping flow. Stepped spillways are structurally stable, resistant to water loads and significantly increase the rate of energy dissipation on the spillway face thus eliminating or greatly reducing the need for a large energy diss...

Artificial neural networks (ANN’s) are associated with difficulties like lack of success in a given problem and unpredictable level of accuracy that could be achieved. In every new application it therefore becomes necessary to check their usefulness vis-à-vis the traditional methods and also to ascertain their performance by trying out different combinations of network architectures and learnin...

Mobile touchscreen applications present new opportunities for children’s language learning. This systematic review synthesizes the evidence on impact of features mobile Experimental studies published from 2010 onwards with children aged 3 to 11 years old were included. Of 1,081 screened, identified, which examined four applications: inbuilt narration, real-time conversation prompts, augmented r...