Deezer company also introduced two subscription services—users paying €4.99 monthly received higher-quality music without ads, and users paying €9.99 monthly gained access to downloadable applications for computers, as well as Android, BlackBerry, and iOS mobile devices. In January 2010, the company's CEO and co-founder, Jonathan Benassaya, was replaced as CEO by Axel Dauchez, after fewer than 15,000 of Deezer's 12 million users signed up for its subscription services. In August 2010, mobile operator Orange partnered with Deezer in a deal to include free access to Deezer Premium, the highest tier of Deezer's streaming packages, with some of Orange's telecommunications contracts in
Shrouded tidal turbine Shrouded tidal turbine The shrouded tidal turbine is an emerging tidal stream technology that has a turbine enclosed in a venturi shaped shroud or duct (ventuduct), producing a sub atmosphere of low pressure behind the turbine. The venturi shrouded turbine is not subject to the Betz limit and allows the turbine to operate at higher efficiencies than the turbine alone by increasing the volume of the flow over the turbine. Claimed improvements vary, from 1.15 to 4 times higher power output than the same turbine minus the shroud. The Betz limit of 59.3% conversion efficiency for a turbine in an