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Post by Aardvaaks on Sept 28, 2009 7:47:54 GMT 10
I wasnt sure whether this fits in Art, or science or tech, or that it was just a cruel trick with hedgehogs, but Nasa has been developing this material and it is being used as building dampners.
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Post by Wes Gear on Sept 29, 2009 0:18:33 GMT 10
A ferrofluid, (portmanteau of the Latin word ferrum, meaning iron, and the word fluid) is a liquid which becomes strongly polarised in the presence of a magnetic field.
Ferrofluids are colloidal mixtures composed of nanoscale ferromagnetic, or ferrimagnetic, particles suspended in a carrier fluid, usually an organic solvent or water. The ferromagnetic nano-particles are coated with a surfactant to prevent their agglomeration (due to van der Waals forces and magnetic forces). Although the name may suggest otherwise, ferrofluids do not display ferromagnetism, since they do not retain magnetization in the absence of an externally applied field. In fact, ferrofluids display (bulk-scale) paramagnetism, and are often described as "superparamagnetic" due to their large magnetic susceptibility. Permanently magnetized fluids are difficult to create at present.[1]
The difference between ferrofluids and magnetorheological fluids (MR fluids) is the size of the particles. The particles in a ferrofluid primarily consist of nanoparticles which are suspended by Brownian motion and generally will not settle under normal conditions. MR fluid particles primarily consist of micrometre-scale particles which are too heavy for Brownian motion to keep them suspended, and thus will settle over time due to the inherent density difference between the particle and its carrier fluid. These two fluids have very different applications as a result. -source wiki-
good stuff aard!
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Post by realorfake on Sept 29, 2009 1:34:46 GMT 10
Remember tho, NASA will never develop anything useful or revolutionizing. NASA is the glass ceiling of technology. They keep us happy with pictures of outer space and remote control RV's that collect dirt and sand all while the underground facilities here on earth are playing with the cool toys...like light sabers.
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Post by Aardvaaks on Sept 29, 2009 4:04:02 GMT 10
Remember tho, NASA will never develop anything useful or revolutionizing. NASA is the glass ceiling of technology. They keep us happy with pictures of outer space and remote control RV's that collect dirt and sand all while the underground facilities here on earth are playing with the cool toys...like light sabers. Well ROF you have took the shine well and truly off this thread however I have to totally agree, we the general public are kept well in the dark with techy developments, well we get some crumbs but this stuff is well behind those used by the elite, computer development is a typical example.
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Post by Wes Gear on Sept 29, 2009 12:36:57 GMT 10
agreed! some stuff is so classified they can't incorporate it into any projects without tilting the world sideways with its technological leap..........so it sits in some top secret facility gathering dust...........better to let it go to waste than give the slightest hint they have something of that caliber.
fuck the cold war mentality!
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Post by Aardvaaks on Oct 13, 2009 6:52:03 GMT 10
We do get snippets that piece together slowly, I mean at the start of this thread I thought yeh great that fluid can be used in an artistic way, or as a cushioning medium, now linking with the anti gravity theme we have Ferrofluids containing Mercury as a friction free medium in a mercury anti gravity drive probably employed in the USAF nuclear powered flying triangle TR3B. Wow.
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