ONErpm has around 15,000 artists around the world and 60,000 fans registered on the site. ONErpm ONErpm (ONE Revolution People's Music) is a digital distribution service and fan engagement platform founded in 2010 by Emmanuel Zunz and Matthew Olim, the latter one of the co-founders of CDNow, a pioneer in digital music which was acquired by Amazon in 2000. The company offer such services as direct-to-fan sales, distribution to multiple web outlets including iTunes, Spotify, Amazon MP3, Rdio, Google Music, Deezer, eMusic, YouTube, music sharing widgets and an app that allows artist to stream and sell music on Facebook According to
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