These dancers are costumed in Chinese dresses, complete with fans Monday 27 August, 2007.

And so here it is in the stomatopod. And again, this is a situation where engineers are very familiar with this phenomenon, because it destroys boat propellers.

So with Firefly, what we did is the problem is electronics get hot and you have to put in vents or fans to keep them cool in most products.

Small turbines are pointed by a simple wind vane, while large turbines generally use a wind sensor coupled with a servo motor.

So, this is the capery where you get fitted for your cape, and then you walk up these three steel graded steps and then we turn on three hydraulic fans from every side and then you can see the cape in action.

Another concern voiced by the Governor of Qunaitra was the installation of large air fans on the western side of the Jabal al Sheikh summit that in case of leaks would blow nuclear waste radiation into Syria.

People have been struggling for years to try and design a very fast rotating boat propeller that doesn't cavitate and literally wear away the metal and put holes in it, just like these pictures show.

Be it corn shellers you've got ploughs you've got fan mills all these things and these are not, again, antiques. These are you can order these. You can go to the web and you can buy them now, brand new made. So in a certain sense, technologies don't die.

So, as you can see in this prototype, gigantic piano strings, each string is controlled with a little robotic element either little bows that stroke the strings, propellers that tickle the strings, acoustic signals that vibrate the strings. We also have an army of robots on stage.

The current version is a turboshaft engine, producing 36 MW, using the Trent 800 core to drive a power turbine which takes power to an electrical generator or to mechanical drives such as waterjets or propellers.