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To: Urlman who wrote (521)1/15/2008 12:25:46 PM
From: Savant
   of 1221
Better Nate than Lever.

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To: Urlman who wrote (521)1/26/2008 4:18:06 PM
From: Savant
   of 1221
Fuzzy photos?

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To: Savant who wrote (523)2/2/2008 6:22:38 PM
From: Urlman
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From: Savant3/25/2008 11:17:31 AM
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Market Magic..

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To: Urlman who wrote (524)11/17/2010 9:48:53 PM
From: Savant
   of 1221
Antimatter atoms have been trapped for the first time

Antimatter atoms have been trapped for the first time, scientists say.

Researchers at Cern, home of the Large Hadron Collider, have held 38 antihydrogen atoms in place, each for a fraction of a second.
Antihydrogen has been produced before but it was instantly destroyed when it encountered normal matter.
The team, reporting in Nature, says the ability to study such antimatter atoms will allow previously impossible tests of fundamental tenets of physics.
The current "standard model" of physics holds that each particle - protons, electrons, neutrons and a zoo of more exotic particles - has its mirror image antiparticle.
The antiparticle of the electron, for example, is the positron, and is used in an imaging technique of growing popularity known as positron emission tomography.
However, one of the great mysteries in physics is why our world is made up overwhelmingly of matter, rather than antimatter; the laws of physics make no distinction between the two and equal amounts should have been created at the Universe's birth.
Slowing anti-atoms
Producing antimatter particles like positrons and antiprotons has become commonplace in the laboratory, but assembling the particles into antimatter atoms is far more tricky.
That was first accomplished by two groups in 2002. But handling the "antihydrogen" - bound atoms made up of an antiproton and a positron - is trickier still because it must not come into contact with anything else.
While trapping of charged normal atoms can be done with electric or magnetic fields, trapping antihydrogen atoms in this "hands-off" way requires a very particular type of field.
"Atoms are neutral - they have no net charge - but they have a little magnetic character," explained Jeff Hangst of Aarhus University in Denmark, one of the collaborators on the Alpha antihydrogen trapping project.

“I'm delighted that it worked as we said it should... it shows that the dream from many years ago is not completely crazy”

Professor Gerald Gabrielse Harvard University
"You can think of them as small compass needles, so they can be deflected using magnetic fields. We build a strong 'magnetic bottle' around where we produce the antihydrogen and, if they're not moving too quickly, they are trapped," he told BBC News.

Such sculpted magnetic fields that make up the magnetic bottle are not particularly strong, so the trick was to make antihydrogen atoms that didn't have much energy - that is, they were slow-moving.
The team proved that among their 10 million antiprotons and 700 million positrons, 38 stable atoms of antihydrogen were formed, lasting about two tenths of a second each.
Early days
Next, the task is to produce more of the atoms, lasting longer in the trap, in order to study them more closely.
"What we'd like to do is see if there's some difference that we don't understand yet between matter and antimatter," Professor Hangst said.
"That difference may be more fundamental; that may have to do with very high-energy things that happened at the beginning of the universe.
"That's why holding on to them is so important - we need time to study them."
Gerald Gabrielse of Harvard University led one of the groups that in 2002 first produced antihydrogen, and first proposed that the "magnetic bottle" approach was the way to trap the atoms.
"I'm delighted that it worked as we said it should," Professor Gabrielse told BBC News.
"We have a long way to go yet; these are atoms that don't live long enough to do anything with them. So we need a lot more atoms and a lot longer times before it's really useful - but one has to crawl before you sprint.
Professor Gabrielse's group is taking a different tack to prepare more of the antihydrogen atoms, but said that progress in the field is "exciting".
"It shows that the dream from many years ago is not completely crazy."

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From: Savant11/24/2010 11:30:15 PM
   of 1221
Corporate Profits Were the Highest on Record Last Quarter

CATHERINE RAMPELL On Tuesday November 23, 2010, 3:22 pm EST
The nation’s workers may be struggling, but American companies just had their best quarter ever.

American businesses earned profits at an annual rate of $1.66 trillion in the third quarter, according to a Commerce Department report released Tuesday. That is the highest figure recorded since the government began keeping track over 60 years ago, at least in nominal or non-inflation-adjusted terms.

Corporate profits have been going gangbusters for a while. Since their cyclical low in the fourth quarter of 2008, profits have grown for seven consecutive quarters, at some of the fastest rates in history.

This breakneck pace can be partly attributed to strong productivity growth — which means companies have been able to make more with less — as well as the fact that some of the profits of American companies come from abroad. Economic conditions in the United States may still be sluggish, but many emerging markets like India and China are expanding rapidly.

Tuesday’s Commerce Department report also showed that the nation’s output grew at a slightly faster pace than originally estimated last quarter. Its growth rate, of 2.5 percent a year in inflation-adjusted terms, is higher than the initial estimate of 2 percent. The economy grew at 1.7 percent annual rate in the second quarter.

Still, most economists say the current growth rate is far too slow to recover the considerable ground lost during the recession.

“The economy is not growing fast enough to reduce significantly the unemployment rate or to prevent a slide into deflation,” Paul Dales, a United States economist for Capital Economics, wrote in a note to clients. “This is unlikely to change in 2011 or 2012.”

The increase in output in the third quarter was driven primarily by stronger consumer spending. Wages and salaries also rose in the third quarter, which might help bolster holiday spending in the final months of 2010.

Private inventory investment, nonresidential fixed investment, exports and federal government also contributed to higher output. These sources of growth were partially offset by a rise in imports, which are subtracted from the total output numbers the government calculates, and a decline in housing and other residential fixed investments.

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To: Savant who wrote (526)12/4/2010 3:22:36 PM
From: Urlman
   of 1221
Hey Savant!

I haven't checked in in a looong time.

Good to see you around these parts.

I just remembered this old thread
Subject 28491

Scott Adams is a great thinker
don't let his dilbert cartoons pigeon hole your thinking about him....


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To: Urlman who wrote (528)12/18/2010 10:43:34 AM
From: Savant
   of 1221
Spin Doctors work Magic...
Spintronics: A New Way To Store Digital Data
by Joe Palca

December 17, 2010

Enlarge HYNIX/AFP/Getty Images
Semiconductor computer chips like this one rely on electricity — positive or negative charges — to store data. Using high power magnets in a lab, researchers have developed a new way to store data in the spin of an atom's nucleus.

HYNIX/AFP/Getty Images
Semiconductor computer chips like this one rely on electricity — positive or negative charges — to store data. Using high power magnets in a lab, researchers have developed a new way to store data in the spin of an atom's nucleus.
text size A A A December 17, 2010
Scientists at the University of Utah have taken an important step toward the day when digital information can be stored in the spin of an atom's nucleus, rather than as an electrical charge in a semiconductor.

The scientists' setup requires powerful magnets and can only be operated at minus 454 degrees Fahrenheit, so don't expect to see spin memory on the shelf at a computer store anytime soon.

Christoph Boehme, an associate professor at the University of Utah, says the most important thing he and his team have done is show that it's possible to store information in spin and read it rather easily.

Here's how they did it: First, they used a strong magnetic field to make sure all their atoms were pointing in the same direction. Then they measured which way the nucleus of an atom was spinning. Physicists don't talk about spinning clockwise or counterclockwise — they call the spins either up or down.

"This up and down can now represent information," says Boehme. "An up means a one, and a down means a zero."

Storing and manipulating these zeroes and ones — bits, in computer parlance — is at the heart of how computers work. Today, those zeroes and ones are stored using electric charge — positive or negative. In the future, things might be different.

"Instead of electronics, people want to use spins and build spintronics, and if you do so, you need to be able to store information," says Boehme.

'Multiple Universes'

As they report in the journal Science, they were able to store information in spins for nearly two minutes. But that wasn't the key achievement.

"The main focus of our study was to show you could read it with an electronic device," he says. In other words, they could use conventional electronics to read out the stored memory. Spintronics has some advantages over electronics. In theory, spin memory should be faster and take less energy to run than electronic memory.

Now, Boehme is working with conventional bits of information. But because he's working with atoms, the setup can take you into the mind-bending world of quantum information. Quantum physics is all about how atoms work.

"In quantum information, I can have a bit which is zero and one at the same time," says John Morton, a physicist at the University of Oxford in England. This idea of being in two places at once is hard to explain. Morton says one way to think about it is to imagine there are multiple universes out there.

"Whenever quantum mechanics allows something to exist in two states at the same time, the universe splits," says Morton, "and you have a universe where it's one thing and a universe where it's in the other state. You can along those lines think about a quantum computer as many parallel computers running in different universes."

Related NPR Stories

Quantum Physics Leaps Into The Visible World
Researchers observe "weird" quantum behavior in an object visible to the naked eye.
Constructive and Destructive Interference In Quantum Mechanics

Oct. 11, 2010
And as long as you can get those universes to talk with another, then you have a very, very powerful computer.

The Magic Of Quantum Computing

Now, don't feel bad if you're not quite getting why quantum computing is such a desirable thing to have.

"It's not an easy one to explain," says Stephen Lyon, a professor of electrical engineering at Princeton University. He and his colleagues are always trying to entice undergraduates to go into the field of quantum computing.

"The approach we've been taking is to say, if you think of a number between one and four, with a quantum computer you could know the number every time with only a single guess. That doesn't at all tell you how it works, but it does tell you that there's something in there that's kind of different from what most people are used to," says Lyon."It's kind of magical."

Of course it's not really magical — it's physics. Weird physics, but physics.

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From: Savant12/24/2010 2:19:01 AM
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To: Savant who wrote (529)1/22/2011 5:33:36 PM
From: Urlman
   of 1221
Dr Quantum - Double Slit Experiment

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