Submarine "cloakng device." This way to the stealth sub.

[u-5075]

http://www.cosmosmagazine.com/node/1788

One diagram

Coming soon: cloaked submarines
Wednesday, 16 January 2008
by Joshua Cockfield

Cosmos Online
BRISBANE: They're already masked beneath the waves, but soon these silent killers could be harder to detect - even using sonar.
American scientists have proven that a cloaking device which would render submarines and ships invisible to sonar is theoretically possible.

"We've devised a recipe for an acoustic material that would essentially open up a hole in space and make something inside that hole disappear from sound waves," said Steven Cummer, an electrical and computer engineer at Duke University in Durham, North Carolina.

A 'three-dimensional (3-D) sound cloak' made of this material would render objects within it acoustically invisible by forcing sound waves around them. The discovery follows on from the development of working models of electromagnetic invisibility cloaks, which operate at microwave frequencies.

Bending sound

Sound waves are normally reflected by objects that lie in their path – and these reflected waves can be detected by sonar. The hypothetical cloaking device could prevent this by bending sound waves around an object, to continue moving along their original path.

To do this without disturbing the waves, artificial substances known as 'metamaterials' are required. These materials have unusual properties that are not found in nature, and which arise from their structure rather than their composition - much like how diamond and graphite have very different properties yet they're both made of carbon.

Waves travelling through a conventional material, like air, all behave the same way regardless of the direction in which they are moving. In contrast, electromagnetic waves passing through metamaterials can behave in different ways, such as travelling at different speeds, depending on their direction.

In a previous study, the Duke University team designed an electromagnetic cloak that could make microwaves pass around it. However, other experts doubted that the cloaking concept would be possible with sound waves.

Working cloak: three years away?

"In my mind, waves are waves. It was hard for me to imagine that something you could do with electromagnetic waves would be completely unachievable for sound waves," said Cummer.

His team wondered if they could come up with a specific set of properties for a metamaterial that would have the same effect on sound waves that previously designed cloaking technology would have on microwaves. So they used mathematical modelling to test the idea.

"And somewhat to our surprise, the answer was yes," he said, adding that a working model of the acoustic sound cloak might be possible within two to three years.

"The paper contains significant theoretical and numerical results," commented Sebastien Guenneau, an expert in metamaterials from the University of Liverpool in England. "I think the paper on 3-D acoustic cloaks will have a high impact."

The research is published in the journal Physical Review Letters.

[junglelord]

Sound waves are normally reflected

Sound waves are normally reflected by objects that lie in their path – and these reflected waves can be detected by sonar. The hypothetical cloaking device could prevent this by bending sound waves around an object, to continue moving along their original path.

To do this without disturbing the waves, artificial substances known as 'metamaterials' are required. These materials have unusual properties that are not found in nature, and which arise from their structure rather than their composition - much like how diamond and graphite have very different properties yet they're both made of carbon.

Indeed I am a graduate student of atomic physics, quantum physics, and nanotechnology. I use Zoom Tools a lot. The quantum world is best understood via the Aether Physics Model.

http://www.16pi2.com/aether_physics_model.htm

I also would suggest the Electric Universe

http://www.thunderbolts.info/forum/phpBB3/index.php

One fine example of metamaterials is 2D crystals.
Another is Graphine - single atoms of graphite (pencil lead)..., that are stronger then steel and is also a perfect EM conductor. It is a place where you can create "magic" via metamaterials, as they do defy the normal limits of matter. It all comes down to geometry.


the geometry of the graphite pencil lead is a cube....while the single atom placement creates the hexagon and the new properties of the Graphine....who would have thought your pencil lead is a superconductor and is stronger then steel....truly the pencil is mighter then the sword...in more ways then one.

The "fields" need an explanation.
They are not a product of the matter..............
for instance Aether is a rmfd (rotating magnetic field) that is derived via 16pi^2 x Kc
where Kc is Coulombs Constant. So the field between the magnets is the aether itself.

All matter exists in forward frequency/time and must have either left or right hand spin.
In fact all matter exists in 1/2 spin quantum domain....

PHI (the Golden Mean Ratio) is the result of the two spin ratios....rmfd Aether and primary angular momentum of matter. These two spin domains exist at one time to crate the geometry of all forms. It is also responsible for the Octave series and also the periodic table in spiral form.

The vortex is the archetype form, look to the spiral galaxy.


I see no place where nature is not curved. There are five dimensions.
Time is best understood as its inverse property, frequency.
Mass is a dimension and is a 2D string in a perfect circle.
Mass is only linear. Think of a piece of paper. Mass is the side, EM charge is the surface....two ways of seeing the same thing.


All charge is distributed. Electrostatic Charge must be quantified.
EM charge already is quantified, but misplaced. EM is the reason a nucleus stays together, the so called gluon. ES when quantified shows a geometric relationship to EM charge that creates the so called Weak Force.

Gavity is gravity. There is no such thing as a Black Hole. There is no Dark Matter or Dark Energy. The universe is Electric. The Plasma Universe is the key to knowledge...it is not "hot gas", it is Plasma, a different state of matter...do not be dumbed down.


Tesla created Impusle Current with his Magnifying Transmitter and left AC current behind. This is Scalar Technology...think Russian Woodpecker.

[tom dougherty]

There is no such thing

There is no such thing as a Black Hole.

Then what the hell is Cygnus X-1, and why is it producing so many X-rays?

[junglelord]

Its a plasmoid Z Pinch.
The

Its a plasmoid Z Pinch.
The sun is a Z Pinch...not a thermonuclear device.
If it was a thermonuclear divice, then how can the hottest temperature be at the corona? You know if it was an thermonuclear oven as they claim, then how could the extreme distance from the oven be the hottest point? The surface of the sun is only 6000 degrees, the corona is in the millions....

Besides a black hole is not sound math, you cannot divide by zero.

http://www.sjcrothers.plasmaresources.com/Ricci.html

Recent articles

$Billions Sucked into Black Holes - Science in the Present Time
13 March, 2009 ~ Dr. Jeremy Dunning-Davies
As more and more money is being requested for scientific experiments which are becoming more and more elaborate, it becomes increasingly important to attempt to explain the basic theory behind the work involved to those who, in the end, pay the bill - YOU - the members of the general public

http://www.thunderbolts.info/thunderblogs/guest_jdd.htm

Thunderblog is a good place to start

http://www.thunderbolts.info/thunderblogs/index.htm

Check the Astronomy Picture of the Day to learn why and how they refuse to admit the universe is electric and try to say its controlled by gravity....that is a crock of poppycock.

http://www.thunderbolts.info/tpod/00archive.htm

See the Plasma Universe
http://www.plasma-universe.com/index.ph ... iverse.com

Plasma Cosmology

http://www.plasmacosmology.net/

Plasma Cosmology

This web site aims to provide an introduction to the emerging Plasma Universe paradigm, and to explore some of the many profound implications.

Mainstream science, for the most part, looks on the universe as electrically neutral and purely mechanical; a place where the weak force of gravity holds fort. Plasma Cosmology, by contrast, acknowledges the electrodynamic nature of the universe. Gravity and inertia are NOT the only forces at work.

The history of science, of course, is fraught with controversy, and it is important to bear in mind that the situation today is little different.

What is Plasma?

Plasma is the fourth state of matter. It differs from solids, liquids and gases in so far as it's atoms are divided into free-floating 'negative' electrons and 'positive' ions (an atom which has lost its electron/s). It is sometimes referred to as an ionized gas.

Students are generally taught about only three states of matter, and when Plasma does get a mention, little importance is assigned. Not only should plasma be added to the list, but the order should be reversed to put it in first place. The reasons for this will become clear.

The term Plasma was borrowed from blood plasma in order to describe its almost life-like and self-organising properties.

Plasma sometimes emits light when under the excitation of electrical and magnetic fields. Polar auroras bear witness to this fact.


Where is it?

Plasma is almost everywhere. At least ninety-nine percent of the known universe is, in fact, matter in its plasma state! The Sun is a giant ball of plasma.
Plasma in space consists entirely of ions and electrons, and is thus very energetic or 'hot'. Only when cooled does it form the matter to which we are familiar here on Earth]www.thunderbolts.info[/url] is updated with fascinating plasma related news on a daily basis.

You can now view the Thunderbolts video at Google Video. If this link doesn't work, go to Google Video and try a search for Thunderbolts.
http://video.google.co.uk/videoplay?doc ... &plindex=0

[u-5075]

'NOTHER ARTICLE ABOUT SONAR "INVISIBLE"

'NOTHER ARTICLE ABOUT SONAR "INVISIBLE" SUBMARINES

http://www.msnbc.msn.com/id/31369750/ns ... e-science/

'Cloak of silence' tech could hide submarines
Same tech could be used to create high-definition, in-utero baby pictures

By Eric Bland
Discovery

updated 11:09 a.m. ET, Mon., June 15, 2009
A new invisibility cloak for sound could help doctors find tiny tumors or hide submarines from enemy sonar.

"Our focus is not about dampening noise, but to guide sound waves around structures," said Nicholas Fang, a professor a the University of Illinois at Urbana Champaign and coauthor, along with Shu Zhang and Leilei Yin, on a paper that appears in the journal Physical Review Letters.

For example, "if we have a coating on a submarine that bends acoustics waves before they hit the surface, guiding them around the submarine smoothly, then you won't be able to detect a submarine using sonar."



The same technology that could render a military submarine invisible to sonar could also be used to create high-definition, in-utero baby pictures or detect previously undetectable, tiny tumors.

Invisibility cloaks, whether for sound or light, both manipulate waves. Harry Potter-style invisibility cloaks manipulate beams of light. Acoustic invisibility cloaks manipulate waves of pressure. Whatever the wave type, the principle is basically the same; bend a wave around an object without breaking it.

The concept is the same, but the design is quite different. One of the many differences between the two types of waves is size.

Sound waves are larger than electromagnetic waves. To manipulate either wave requires structures many times smaller than the size of the wave. Because the properties of the material are determined by their physical structure and not their chemical make-up, as they traditionally are, they are called metamaterials.

"If you need to build an ultrasonic metamaterial, the dimension of the physical structure is tens or hundreds of microns," said Fang. "Compare that with optical metamaterials, and you are talking about hundreds of nanometers. That makes it a lot more amenable for research."

The sonic invisibility cloak works a lot like a musical instrument.

Musical instruments amplify sound waves using shaped cavities. The sonic metamaterial uses cubes and octagons to create holes that can then bend the wave around the structure. The most obvious application would be as a coating for submarines that want to avoid detection from enemy sonar.

Besides bending waves around a structure, the CD-sized metamaterial can also focus sound waves into a sub-millimeter-sized area, an area smaller than traditional ultrasound machines can currently see. Known as a super lens, it could enable doctors to see babies in utero in much higher definition or detect tumors that are currently too small for ultrasonic detection.

"We have seen some very exciting demonstrations," said Fang. "But to make this as a practical structure we need another three to five years."


Click for related content
Invisibility cloak closer than ever to reality
Cosmic Log: Seeing through invisibility
'Invisibility cloak' directs light away from eye

Other researchers are excited by the development.

"This is one of the very first metamaterials that has been designed to work and actually do something useful for sound waves instead of electromagnetic waves," said Steven Cummer, a professor at Duke University who helped develop the original invisibility cloak in 2005.

"I would say that the Illinois design for two-dimensional acoustic metamaterials is pretty straightforward to manufacture. I certainly hope that it can be transitioned to an actual application," said Cummer.