Half a croissant, on a plate, with a sign in front of it saying '50c'
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Tuning Fork Battery

 3d printed fractal resonator
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This is a fractal tuning fork, 3d printed so that its vibrating behavior is optimized. The material, shape and size all could be varied adaptively to maximize its vibratory energy storing cspability. So it would start as a hard round blob at one end and gradually become an infinty of springy branches at the other end. If not a battery at least it would make a cool bouncing tree statue.
—JesusHChrist, Mar 10 2013

Physical model of Tree vibration http://www.ncbi.nlm...gov/pubmed/23196396
A place to start [csea, Mar 11 2013]

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       Actually maybe this should be the inside out version of this -- a hard sphere with adaptive springy branches that go toward its center, attached to another hard sphere at the center - so an adaptive gyroscope.
—JesusHChrist, Mar 11 2013
   

       I read this as Turing Fork Battery, which is a series of magnets and coils secreted in the handles of cutlery of your local maths faculty...but you could do the knives and spoons as well.
—not_morrison_rm, Mar 11 2013
   

       // If not a battery //   

       Best part of the idea. ^
—csea, Mar 11 2013
   


 

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