the flow of life-dream.......say what????????

[Guest guest]

Nisargadatta , " toombaru2006 " <lastrain wrote:

>

> Nisargadatta , " iietsa " <iietsa@> wrote:

> >

> > ...

> >

> > there are resistance to the flow of life everywhere...

> > ...why just dont let life flow with its own buisness...

> > ...iietsa

> >

>

>

> Electricity exists only in resistance.

>

>

> toombaru

 

 

 

 

 

um...ah...maybe adrian (see below) just doesn't know what the hell he

talking about...i understand he's had NO kensho let alone a full blown

satori.but he seems to be in agreement with most junior high physics

books. who'd a thunk they'd be learnin' them kids all wrong. lookie

here what them guys and books is sayin in direct conradiction to our

resident whiz:

 

 

" For materials that carry electricity without resistance, a little

nanotechnology turns a major turnoff into a turn-on, says a team of

researchers. Ordinarily, a magnetic field quashes the currents flowing

freely through a superconductor. But when decked out in tiny magnetic

dots, a superconductor may behave just the opposite way and carry

electricity freely only when exposed to a magnetic field, the team

reports in the 16 May PRL. Their technique might someday boost the

current-carrying capacity of superconducting wires, or set the bits in

quantum computers.

 

Usually, superconductivity and magnetic fields get along about as well

as a pair of squabbling three-year-olds. When made sufficiently

strong, a magnetic field disrupts the resistance-free flow of

electricity and turns a superconductor into an ordinary conductor.

This effect limits the amount of free-flowing current a superconductor

can carry, as the current itself produces a magnetic field, which can

grow large enough to scramble the superconductivity. For years,

physicists have known, however, that a few exotic compounds have a

paradoxical penchant for magnetic fields and will conduct electricity

freely only when subjected to one--a phenomenon known as field-induced

superconductivity.

 

But any superconductor can be made to pull off that trick if it is

studded with little magnetic dots, say Martin Lange, Victor

Moshchalkov, and their colleagues from the Catholic University of

Leuven in Belgium. To prove it, the researchers studied microchips

covered with films of lead, which becomes a superconductor when cooled

within a few degrees of absolute zero. On top of the lead, they spread

a grid of tiny magnetic dots, each measuring 800 nanometers across and

separated from its neighbors by 1.5 micrometers. The magnetization of

the dots could point either up or down. If it pointed up, the dots

created a field pattern that pointed up through the lead directly

beneath each dot and then curled around to point down through the lead

in between the dots. These fields killed the superconductivity in the

film, just as expected.

 

Then the researchers applied an external magnetic field that also

pointed up through the film. Between the dots this external field

cancelled the field from the dots themselves, allowing the

superconductivity to switch on and the film to carry electricity

without resistance. Of course, directly under the dots, the external

field reinforced the one that was already there and further suppressed

the superconductivity, leaving little islands where current was

inhibited. " It's like a Swiss cheese, " Moshchalkov says. " You have

holes. But luckily for us, a lot of [superconducting] material remains. "

 

The magnetic dots might someday be incorporated into superconducting

wires to counter the fields the wires themselves produce and thus

increase the amount of current they can carry, Moshchalkov says. Or

they might be used to set up currents flowing both ways at once around

tiny superconducting rings. Such rings might someday server as the

bits in ultra-fast quantum computers.

 

Those applications may be years away, but the technique already

demonstrates the tremendous potential of combining disparate

materials, such as magnets and superconductors, with nanotechnology,

says Francesco Tafuri of the Italian National Institute for the

Physics of Matter and the Second University of Naples. " It's the best

combination of two things that probably hold the keys to the future, "

Tafuri says, " hybrid systems and nanostructures. "

 

--Adrian Cho

Adrian Cho is a freelance science writer in Grosse Pointe Park, Michigan.

 

...maybe this holds true only in michigan and ontario?

 

...things go differently in califonia?

 

....that's special.

 

 

..b b.b.