Thought for the month

“You know," said Arthur, "it's at times like this, when I'm trapped in a Vogon airlock with a man from Betelgeuse, and about to die of asphyxiation in deep space that I really wish I'd listened to what my mother told me when I was young." "Why, what did she tell you?" "I don't know, I didn't listen.” From The Hitchhiker's Guide to the Galaxy, Douglas Adams, Author (1952-2001)

Thursday, 24 May 2012

Whose sonic screwdriver?

I still think that Dr Who has the edge for overall usefulness, but a group at the University of Dundee have come up with their version of a sonic screwdriver. The team used an array to form an ultrasound beam that can both carry momentum to push away an object in its path and, by using a beam shaped like a helix or vortex, cause objects to rotate. The Sonic Screwdriver can be viewed rotating a rubber disc.

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