Author Topic: Weekly Science Headlines  (Read 310793 times)

Mesozoic Mister Nigel

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Re: Weekly Science Headlines
« Reply #675 on: May 29, 2012, 11:03:34 pm »
16 Year old kid solves 300 year old physics riddle

The Brain May Disassemble Itself in Sleep

It's bumming me out that I can't get that first link to load...maybe later today.

The second one is fascinating, and I also wonder if there's any connection with the fact that I often wake up understanding math problems that I was struggling with when I went to bed.

Re: first link: Try googling "Shouryya Ray".

Sweet, thanks!
“I’m guessing it was January 2007, a meeting in Bethesda, we got a bag of bees and just started smashing them on the desk,” Charles Wick said. “It was very complicated.”


Telarus

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Re: Weekly Science Headlines
« Reply #676 on: July 10, 2012, 09:07:03 am »
http://www3.griffith.edu.au/03/ertiki/tiki-read_article.php?articleId=37742

Shadow of a single atom captured in a photo image


Quote
In an international scientific breakthrough, a Griffith University research team has been able to photograph the shadow of a single atom for the first time.
"We have reached the extreme limit of microscopy; you cannot see anything smaller than an atom using visible light," Professor Dave Kielpinski of Griffith University's Centre for Quantum Dynamics in Brisbane.

"We wanted to investigate how few atoms are required to cast a shadow and we proved it takes just one," Professor Kielpinski said.

Published this week in Nature Communications, "Absorption imaging of a single atom" is the result of work over the last 5 years by the Kielpinski/Streed research team.   

At the heart of this Griffith University achievement is a super high-resolution microscope, which makes the shadow dark enough to see. No other facility in the world has the capability for such extreme optical imaging.

Holding an atom still long enough to take its photo, while remarkable in itself, is not new technology; the atom is isolated within a chamber and held in free space by electrical forces.

Professor Kielpinski and his colleagues trapped single atomic ions of the element ytterbium and exposed them to a specific frequency of light. Under this light the atom's shadow was cast onto a detector, and a digital camera was then able to capture the image.

"By using the ultra hi-res microscope we were able to concentrate the image down to a smaller area than has been achieved before, creating a darker image which is easier to see," Professor Kielpinski said.

The precision involved in this process is almost beyond imagining.

"If we change the frequency of the light we shine on the atom by just one part in a billion, the image can no longer be seen," Professor Kielpinski said.

Research team member, Dr Erik Streed, said the implications of these findings are far reaching.

"Such experiments help confirm our understanding of atomic physics and may be useful for quantum computing," Dr Streed said.

There are also potential follow-on benefits for biomicroscopy.

"Because we are able to predict how dark a single atom should be, as in how much light it should absorb in forming a shadow, we can measure if the microscope is achieving the maximum contrast allowed by physics."

"This is important if you want to look at very small and fragile biological samples such as DNA strands where exposure to too much UV light or x-rays will harm the material.

"We can now predict how much light is needed to observe processes within cells, under optimum microscopy conditions, without crossing the threshold and destroying them."

And this may get biologists thinking about things in a different way.

"In the end, a little bit of light just might be enough to get the job done."


THAT is bad-ass SCIENCE!
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Salty

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Re: Weekly Science Headlines
« Reply #677 on: July 10, 2012, 06:02:06 pm »
Hey Net, I guess that pile of rice paradox you told me is solved.

It's 1. 1 grain of rice makes a pile.
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Nephew Twiddleton

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Re: Weekly Science Headlines
« Reply #678 on: July 10, 2012, 09:18:03 pm »
Is it more difficult to photograph hydrogen? I ask because i wonder if atomic mass matters at all.
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Telarus

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Re: Weekly Science Headlines
« Reply #679 on: July 20, 2012, 05:13:17 pm »
Got some crazy Slashdot stories for you from this week.

http://politics.slashdot.org/story/12/07/17/1734227/how-ny-gov-cuomo-sidesteps-freedom-of-information-requests-with-his-blackberry
New submitter wrekkuh writes
"The Daily News is reporting that if aides of New York's Governor Andrew Cuomo cannot speak in person or by telephone with the Governor, they are told to use BlackBerry's PIN-to-PIN messaging system — a function that leaves no lasting trail because it bypasses data-saving email servers. Consequently, a Freedom of Information request for all e-mails to and from Governor Cuomo's office resulted in an empty reply from the Records Access Officer: 'Please be advised that the New York State Executive Chamber has conducted a diligent search, but does not possess records responsive to your request.'"

 :fnord: :fnord: :fnord:


http://news.slashdot.org/story/12/07/18/2031237/trolling-al-qaeda-for-peace
The Mister Purple writes
"There is a small initiative underway to combat Islamic militant recruiting on the Internet... by trolling them. Quoting the article: 'The program, called Viral Peace, seeks to occupy the virtual space that extremists fill, one thread or Twitter exchange at a time. Shahed Amanullah, a senior technology adviser to the State Department and Viral Peace's creator, tells Danger Room he wants to use "logic, humor, satire, [and] religious arguments, not just to confront [extremists], but to undermine and demoralize them." Think of it as strategic trolling, in pursuit of geopolitical pwnage.' So, does this mean that I'm promoting peace when I post YouTube comments?"

 :lulz:


http://tech.slashdot.org/story/12/07/17/2250243/asimovs-psychohistory-becoming-a-reality
northernboy writes
"Today's LA Times has an article describing how a Wikileaks data dump from Afghanistan plus some advanced algorithms are allowing accurate predictions about the behavior of large groups of people. From the article: 'The programmers used simple code to extract dates and locations from about 77,000 incident reports that detailed everything from simple stop-and-search operations to full-fledged battles. The resulting map revealed the outlines of the country's ongoing violence: hot spots near the Pakistani border but not near the Iranian border, and extensive bloodshed along the country's main highway. They did it all in just one night. Now one member of that group has teamed up with mathematicians and computer scientists and taken the project one major step further: They have used the WikiLeaks data to predict the future.' Considering they did not discriminate between types of skirmish, but only when and where there was violence, this seems like an amazing result. It looks like our robotic overlords will have even less trouble controlling us than I previously thought."

 :aaa:


http://science.slashdot.org/story/12/07/19/2038203/political-ideology-shapes-how-people-perceive-temperature
benfrog writes
"In what likely isn't that much of a surprise, a study has shown that political ideology shapes how we perceive temperature changes (but not drought/flooding conditions). (An abstract of the study is here. 8,000 individuals were asked about temperatures and drought/flood events in recent years, then their political leanings. Answers regarding drought/flood events tended to follow the actual changes in conditions, while answers regarding temperature tended to follow people's political beliefs."

 :eek:


Those last two are super interesting to me.
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Telarus

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Re: Weekly Science Headlines
« Reply #680 on: August 07, 2012, 08:57:01 am »
http://www.adelaide.edu.au/news/news55081.html

Giant moa had climate change figured out
Then, humans with pointy sticks killed them all....
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Re: Weekly Science Headlines
« Reply #683 on: August 08, 2012, 05:26:08 am »
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Re: Weekly Science Headlines
« Reply #684 on: August 11, 2012, 09:59:46 pm »
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LMNO

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Re: Weekly Science Headlines
« Reply #685 on: August 22, 2012, 03:59:52 pm »
Dude, that's a game changer, if you can produce it cheaply.

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Re: Weekly Science Headlines
« Reply #686 on: November 13, 2012, 08:21:57 pm »
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Mesozoic Mister Nigel

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Re: Weekly Science Headlines
« Reply #687 on: November 13, 2012, 09:29:08 pm »
That sounds so nasty.
“I’m guessing it was January 2007, a meeting in Bethesda, we got a bag of bees and just started smashing them on the desk,” Charles Wick said. “It was very complicated.”


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Re: Weekly Science Headlines
« Reply #688 on: November 13, 2012, 09:45:24 pm »
Specially made to order Spamcakes?
Once knew a man who shat himself to death eating too much citrus.

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Re: Weekly Science Headlines
« Reply #689 on: November 13, 2012, 10:43:04 pm »
That sounds so nasty.

 :?
why? it looks like it's just cnc cupcake icing at the moment....
they mention 'turkey domes' which is a little odd, but i imagine it's not any stranger than lunchmeat...