What the Heck?! Thread (Closed)

Status
Not open for further replies.

Jeff Head

General
Registered Member
clECKZP.png
I think that map has a problem with the relative sizes of Texas and Florida.

Texas is ranked 2nd in population with a current estimate of 27,695,284

Florida is ranked 3rd in population with a current estimate of 19,893,297

Either Florida is too big, or Texas too small on that map IMHO.
 

Miragedriver

Brigadier
I think that map has a problem with the relative sizes of Texas and Florida.

Texas is ranked 2nd in population with a current estimate of 27,695,284

Florida is ranked 3rd in population with a current estimate of 19,893,297

Either Florida is too big, or Texas too small on that map IMHO.

That is just one more reason why we call not trust what comes from the journalism sector. They need to hire SDF members for their Quality Control.:rolleyes:


Back to bottling Grenache and measuring state sizes
 

no_name

Colonel
I think that map has a problem with the relative sizes of Texas and Florida.

Texas is ranked 2nd in population with a current estimate of 27,695,284

Florida is ranked 3rd in population with a current estimate of 19,893,297

Either Florida is too big, or Texas too small on that map IMHO.

I think the map is not showing absolute population of the states, but population density, and Texas is much bigger than Florida. Though I have to say the article was not explicit in mentioning that.

That is also why Alaska looks so tiny, even if it had low population to begin with.
alaska.jpg
 

Jeff Head

General
Registered Member
I think the map is not showing absolute population of the states, but population density, and Texas is much bigger than Florida. Though I have to say the article was not explicit in mentioning that.
Thanks.

That would definitely explain it and would definitely account for the sizing shown there between Texas and Florida...but then I would expect a place like Connecticut of New Jersey to look even larger.

Perhaps it is an algorithm that factors both actual population and density so that the density doesn't completely override things either way?..
 

no_name

Colonel
Thanks.

That would definitely explain it and would definitely account for the sizing shown there between Texas and Florida...but then I would expect a place like Connecticut of New Jersey to look even larger.

Perhaps it is an algorithm that factors both actual population and density so that the density doesn't completely override things either way?..

Looking back again I now think they only scale the size to number of people and not density. Hawaii is about twice the total population of Alaska and looks about twice the size on that figure. If scaled for area it should be drawn a lot bigger compared to Alaska.

The shape of the states probably made area estimation hard. Florida looks long but it is also narrower.
 

Equation

Lieutenant General
View gallery

Ripped from the pages of a sci-fi novel, physicists have crafted a wormhole that tunnels a magnetic field through space.


"This device can transmit the magnetic field from one point in space to another point, through a path that is magnetically invisible," said study co-author Jordi Prat-Camps, a doctoral candidate in physics at the Autonomous University of Barcelona in Spain. "From a magnetic point of view, this device acts like a wormhole, as if the magnetic field was transferred through an extra special dimension."

The idea of a wormhole comes from Albert Einstein's theories. In 1935, Einstein and colleague Nathan Rosen realized that the general theory of relativity allowed for the existence of bridges that could link two different points in space-time. Theoretically these Einstein-Rosen bridges, or
Please, Log in or Register to view URLs content!
, could allow something to tunnel instantly between great distances (though the tunnels in this theory are extremely tiny, so ordinarily wouldn't fit a space traveler). So far, no one has found evidence that space-time wormholes actually exist. [
Please, Log in or Register to view URLs content!
]

The new wormhole isn't a space-time wormhole per se, but is instead a realization of a futuristic "invisibility cloak" first proposed in 2007 in the journal
Please, Log in or Register to view URLs content!
. This type of wormhole would hide electromagnetic waves from view from the outside. The trouble was, to make the method work for light required materials that are extremely impractical and difficult to work with, Prat said.

Magnetic wormhole

But it turned out the materials to make a magnetic wormhole already exist and are much simpler to come by. In particular,
Please, Log in or Register to view URLs content!
, which can carry high levels of current, or charged particles, expel magnetic field lines from their interiors, essentially bending or distorting these lines. This essentially allows the magnetic field to do something different from its surrounding 3D environment, which is the first step in concealing the disturbance in a magnetic field.

Please, Log in or Register to view URLs content!

A new device has created a magnetic wormhole, in which a magnetic field enters one end and seems to …
So the team designed a three-layer object, consisting of two concentric spheres with an interior spiral-cylinder. The interior layer essentially transmitted a magnetic field from one end to the other, while the other two layers acted to conceal the field's existence.

The inner cylinder was made of a ferromagnetic mu-metal. Ferromagnetic materials exhibit the strongest form of
Please, Log in or Register to view URLs content!
, while mu-metals are highly permeable and are often used for shielding electronic devices.

A thin shell made up of a high-temperature superconducting material called yttrium barium copper oxide lined the inner cylinder, bending the magnetic field that traveled through the interior.

The final shell was made of another mu-metal, but composed of 150 pieces cut and placed to perfectly cancel out the bending of the magnetic field by the superconducting shell. The whole device was placed in a liquid-nitrogen bath (high-temperature superconductors require the low temperatures of
Please, Log in or Register to view URLs content!
to work).

Normally, magnetic field lines radiate out from a certain location and decay over time, but the presence of the magnetic field should be detectable from points all around it. However, the new magnetic wormhole funnels the magnetic field from one side of the cylinder to another so that it is "invisible" while in transit, seeming to pop out of nowhere on the exit side of the tube, the researchers report today (Aug. 20) in the journal
Please, Log in or Register to view URLs content!
.

"From a magnetic point of view, you have the magnetic field from the magnet disappearing at one end of the wormhole and appearing again at the other end of the wormhole," Prat told Live Science.

Broader applications

There's no way to know if similar magnetic
Please, Log in or Register to view URLs content!
, but the technology could have applications on Earth, Prat said. For instance, magnetic resonance imaging (MRI) machines use a giant magnet and require people to be in a tightly enclosed central tube for diagnostic imaging.

But if a device could funnel a magnetic field from one spot to the other, it would be possible to take pictures of the body with the strong magnet placed far away, freeing people from the claustrophobic environment of an
Please, Log in or Register to view URLs content!
, Prat said.

To do that, the researchers would need to modify the shape of their magnetic wormhole device. A sphere is the simplest shape to model, but a cylindrical outer shell would be the most useful, Prat said.

"If you want to apply this to medical techniques or medical equipment, for sure you will be interested in directing toward any given direction," Prat said. "A spherical shape is not the most practical geometry."
Please, Log in or Register to view URLs content!


Star Trek world here we come!:)
 
Status
Not open for further replies.
Top