Follow Slashdot blog updates by subscribing to our blog RSS feed

 



Forgot your password?
typodupeerror
×

Submission + - Low-Cost 3D-Printed Prosthetic Hand to be Tested on Amputees in Ecuador (gizmag.com)

Zothecula writes: A PhD candidate and six undergraduate students at the University of Illinois at Urbana-Champaign (UCIC) have created a low-cost, programmable, 3D-printed prosthetic hand that may soon change the lives of amputees in Ecuador. The hand costs just $270 to manufacture, making it a small fraction of the cost of a typical prosthetic of this type.

Submission + - First Experimental Demonstration of a Trapped Rainbow Using Silicon

KentuckyFC writes: Back in 1947, a pair of physicists demonstrated that when a beam of light reflects off a surface, the point of reflection can shift forward when parts of the beam interfere with each other. 60 years later, another group of physicists discovered that this so-called Goos-Hanchen effect could sometimes be negative so the point of reflection would back towards the source rather than away from it. They even suggested that if the negative effect could be made big enough, it could cancel out the forward movement of the light. In other words, the light would become trapped at a single location. Now, physicists have demonstrated this effect for the first time using light reflected of a sheet of silica. The trick they've employed is to place a silicon diffraction grating in contact with the silica to make the interference effect large enough to counteract the forward motion of the light. And by using several gratings with different spacings, they've trapped an entire rainbow. The light can be easily released by removing the grating. Until now, it has only been possible to trap light efficiently inside Bose Einstein Condensate at temperatures close to absolute zero. The new technique could be used as a cheap optical buffer or memory, making it an enabling technology for purely optical computing.

Comment Re:That's Kinda Creepy... (Score 1) 110

The article doesn't say though. Some neuroscientists argye that the initiation of action may preceed the initation of the perception of "willing it":

http://en.wikipedia.org/wiki/N...

If that is the case, it could be there's a method of forcing movement that would be perceived as your own actions.

It could be that every action you've ever taken fits that description of forced movement. Forced by the way your genes built you, or the way your environment influenced the build, or by the resident influence of memes.

From a certain perspective, a social organism is just the interface between genes and memes. Both use you to replicate, both often fool you into thinking a threat to them is also a threat to you.

Comment Re:US Citizenship (Score 4, Informative) 190

"I too have been a close observer of the doings of the Bank of the United States. I have had men watching you for a long time, and am convinced that you have used the funds of the bank to speculate in the breadstuffs of the country. When you won, you divided the profits amongst you, and when you lost, you charged it to the bank. You tell me that if I take the deposits from the bank and annul its charter I shall ruin ten thousand families. That may be true, gentlemen, but that is your sin! Should I let you go on, you will ruin fifty thousand families, and that would be my sin! You are a den of vipers and thieves. I have determined to rout you out, and by the Eternal, (bringing his fist down on the table) I will rout you out!
-Andrew Jackson

Comment Cane toads (Score 1) 282

Same thing is happening among the cane toads spreading from one side of Austrailia to the other. The fastest ones on the frontier only mate with each other, making super fast cane toads.

Slashdot Top Deals

"Remember, extremism in the nondefense of moderation is not a virtue." -- Peter Neumann, about usenet

Working...