gnixdep - Slashdot User

Comment Energy costs (Score 1) 193

by gnixdep on Friday March 21, 2008 @10:14AM (#22818804) Attached to: Buckyballs Can Store Concentrated Hydrogen

The cost of splitting hydrogen from water, then recombining it in a fuel cell is huge. It operates at approximately 35% efficiency. Lithium-ion batteries have a round trip efficiency of over 90%, are cheaper, and can be recharged in minutes.

Hydrogen has been passed by as a technology, and nobody seems to realize it yet, because it has enough capital behind it which is pushing for it's adoption so the investments made can be paid off.

"Spooky" Science Points Towards Quantum Computing 294

Posted by ScuttleMonkey on Friday September 07, 2007 @01:14PM from the more-success-quantum-theory-has-the-sillier-it-looks dept.

Stony Stevenson writes to tell us that University of Michigan physicists have been able to establish an "entanglement" between two atoms trapped more than a meter apart in different enclosures using light. This shows how two different atoms can have a sort of communication, something Einstein referred to as 'spooky action-at-a-distance'. "By manipulating the photons emitted from each of the two atoms and guiding them to interact along a fibre-optic thread, the researchers were able to detect the resulting photon clicks and entangle the atoms. Professor Monroe explained that the fibre-optic thread was necessary to establish entanglement of the atoms. But the fibre could be severed and the two atoms would remain entangled, even if one were 'carefully taken to Jupiter'."

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