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Posted
by
timothy
from the you-must-become-the-frozen-water dept.
ccktech writes "As reported by NPRand Chemistry world, the journal Science has a paper by David Ehre, Etay Lavert, Meir Lahav, and Igor Lubomirsky [note: abstract online; payment required to read the full paper] of Israel's Weizmann Institute, who have figured out a way to freeze pure water by warming it up. The trick is that pure water has different freezing points depending on the electrical charge of the surface it resides on. They found out that a negatively charged surface causes water to freeze at a lower temperature than a positively charged surface. By putting water on the pyroelectric material Lithium Tantalate, which has a negative charge when cooler but a positive change when warmer; water would remain a liquid down to -17 degrees C., and then freeze when the substrate and water were warmed up and the charge changed to positive, where water freezes at -7 degrees C."
I prefer open security practices instead of warrantless, and if you're tapping information...just do it discreetly and prevent abuse of personal information
In 10 years everybody can buy cheap "sunglass" with similar functionality, so if you like privacy then it's indeed time to invest in shirt and pants that route x-rays around the body:-)