Become a fan of Slashdot on Facebook

 



Forgot your password?
typodupeerror

+ - New Clock May End Time As We Know It-> 1

Submitted by SonicSpike
SonicSpike (242293) writes "At the heart of this new clock is the element strontium. Inside a small chamber, the strontium atoms are suspended in a lattice of crisscrossing laser beams. Researchers then give them a little ping, like ringing a bell. The strontium vibrates at an incredibly fast frequency. It's a natural atomic metronome ticking out teeny, teeny fractions of a second.

This new clock can keep perfect time for 5 billion years.

"It's about the whole, entire age of the earth," says Jun Ye, the scientist here at JILA who built this clock. "Our aim is that we'll have a clock that, during the entire age of the universe, would not have lost a second."

But this new clock has run into a big problem: This thing we call time doesn't tick at the same rate everywhere in the universe. Or even on our planet.

Right now, on the top of Mount Everest, time is passing just a little bit faster than it is in Death Valley. That's because speed at which time passes depends on the strength of gravity. Einstein himself discovered this dependence as part of his theory of relativity, and it is a very real effect.

The relative nature of time isn't just something seen in the extreme. If you take a clock off the floor, and hang it on the wall, Ye says, "the time will speed up by about one part in 1016."

That is a sliver of a second. But this isn't some effect of gravity on the clock's machinery. Time itself is flowing more quickly on the wall than on the floor. These differences didn't really matter until now. But this new clock is so sensitive, little changes in height throw it way off. Lift it just a couple of centimeters, Ye says, "and you will start to see that difference."

This new clock can sense the pace of time speeding up as it moves inch by inch away from the earth's core."

Link to Original Source

+ - Birds found using human musical scales for the first time->

Submitted by sciencehabit
sciencehabit (1205606) writes "The flutelike songs of the male hermit thrush are some of the most beautiful in the animal kingdom. Now, researchers have found that these melodies employ the same mathematical principles that underlie many Western and non-Western musical scales—the first time this has been seen in any animal outside humans. It’s doubtful that the similarity is due to the physics of the birds’ vocal tract, the team reports. Rather, it seems male hermit thrushes choose to sing notes from these harmonic series. It may be that such notes are easier for the males to remember, or provide a ready yardstick for their chief critics—female hermit thrushes. The study adds to other research indicating that human music is not solely governed by cultural practices, but is also at least partially determined by biology."
Link to Original Source

Comment: Re:God of the gaps (Score 1) 669

by Master Moose (#48264725) Attached to: Pope Francis Declares Evolution and Big Bang Theory Are Right

Church leaders advocate public health policies (like abstinence) that demonstrably do not work in spite of copious scientific evidence showing that they do not work.

Not a scientist here :) but I would like to see the studies where the practice of abstinence has not prevented the spread of STIs and unwanted pregnancies.

Now, I would concede that abstinence often doesn't occur because people generally like to fuck. Maybe I am just being a bit too picky today..

Cloud

Apple Allegedly Knew of iCloud Brute-Force Vulnerability Since March 93

Posted by samzenpus
from the heads-up dept.
blottsie writes Apple knew as early as March 2014 of a security hole that left the personal data of iCloud users vulnerable, according to leaked emails between the company and a noted security researcher. In a March 26 email, security researcher Ibrahim Balic tells an Apple official that he's successfully bypassed a security feature designed to prevent "brute-force" attacks. Balic goes on to explain to Apple that he was able to try over 20,000 passwords combinations on any account.

Comment: Internal Win Modem (Score 1) 334

If they are using an internal WinModem, drivers and the ability to access this over linux may be severely limited. I would suggest if their only access point is a good old fashioned screeching modem that they get brought an external one (assuming that they don't already have one)

I have never seen anything fill up a vacuum so fast and still suck. -- Rob Pike, on X.

Working...