Deezer France. Almost immediately after the partnership began, the rate of users signing up for Deezer's premium services went from 6,000 a month to 100,000; by January 2011, 500,000 people were subscribing to the service, with the million-subscriber mark reached in the middle of 2011, half a year ahead of schedule. The two companies expanded their partnership in September 2011 to include Orange contract customers in the United Kingdom. Also in September, Deezer added Facebook integration to its service, allowing users to send music to one another via that social media service. Deezer was launched in France in 2007. On 7
Tidal barrage pressure). When the water level outside of the basin or lagoon changes relative to the water level inside, the turbines are able to produce power. The basic elements of a barrage are caissons, embankments, sluices, turbines, and ship locks. Sluices, turbines, and ship locks are housed in caissons (very large concrete blocks). Embankments seal a basin where it is not sealed by caissons. The sluice gates applicable to tidal power are the flap gate, vertical rising gate, radial gate, and rising sector. Only a few such plants exist. The first was the Rance Tidal Power Station, on the Rance river,