Forgot your password?
typodupeerror

+ - Ultra sensitive detection of radio waves with lasers->

Submitted by xOneca
xOneca (1271886) writes "It's a bit outdated, (a month ago) but it didn't appear in Slashdot, despite being interesting.

From the article:

'Noise' in the detector of the measuring instrument limits how sensitive and precise the measurements can be. [...] "We have developed a detector that does not need to be cooled down, but which can operate at room temperature and yet hardly has any thermal noise. The only noise that fundamentally remains is so-called quantum noise, which is the minimal fluctuations of the laser light itself," explains Eugene Polzik, Professor and Head of the research center Quantop at the Niels Bohr Institute at the University of Copenhagen. [...] The experiment consists of an antenna, which picks up the radio waves, a capacitor and a laser beam. The antenna picks up the radio waves and transfers the signal to the capacitor, which is read by the laser beam.

"

Link to Original Source

Comment: Re:Probably the home router... (Score 1) 574

by xOneca (#46293563) Attached to: Whatever Happened To the IPv4 Address Crisis?

What Dagger2 is trying to say is that the same effect can be achieved with a router that does not NAT, but does stateful firewalling. That without all the hassles of having two separate networks at both ends of the router.

Standard home routers could implement it more efficiently than NAT: no need to configure local LAN and no limit in outgoing simultaneous connections (~65000). And if an internal host must be reached from outside, it can be allowed through the firewall (entirely, or just a few ports).

Earth

Did Neandertals Paint Early Cave Art? 126

Posted by timothy
from the everyone's-a-critic dept.
sciencehabit writes "Dating experts working in Spain, using a technique relatively new to archaeology, have pushed dates for the earliest cave art back some 4000 years to at least 41,000 years ago, raising the possibility that the artists were Neandertals rather than modern humans. And a few researchers say that the study argues for the slow development of artistic skill over tens of thousands of years — not a swift acquisition of talent, as some had argued."

Great spirits have always encountered violent opposition from mediocre minds. -- Albert Einstein

Working...