Building on light -
cloaking work, physicists took a small step toward the goal of shielding cities from earthquakes by deflecting incoming energy.
We might be able to make
the cloak work for a brief time, for a microsecond at red, a microsecond at green, a microsecond at blue, and you could make it look translucent.
That cloak worked only for light of a specific microwave frequency.
But
that cloak worked only at a predefined wavelength of light and concealed a very small area, calling attention to the shortcomings of metamaterial approaches.
But
the cloak worked to perfection: Because the laser passed through the unlit gap, the color of the beam didn't change.
Not exact matches
Now imagine the same information
cloaked in the trappings of a great story, «a story about a family in South America that is being affected by changes in the global economy — a story about the father going to
work in a foreign country to earn enough for the family, and the mother having to drive 100 kilometers for health care.»
The
cloak - and - dagger appeal of Logan's
work wore off long ago; he readily confesses his job has become a mixture of boredom and frustration.
Instead, in exchange for increased «privacy,» perhaps the Legislative Council should
work to increase transparency of the Hong Kong corporate world and remove the
cloak that is casting a dark shadow over corporate governance and civil liberties in this unique place.
Poverty and wealth can then become the venue in which redemption once accepted leads to a
working out of salvation for both the giver of the
cloak and the recipient, done within the life of grace.
Ex-lobbyist Todd Howe described how top Gov. Andrew Cuomo aide Joe Percoco helped run the government when he was a campaign manager and helped arrange fundraisers with
cloaked donors while
working for the state, in testimony Tuesday at Percoco's federal bribery trial.
Former lobbyist Todd Howe, a prosecution witness, has testified that Percoco helped run state government when he was a Cuomo campaign manager and helped arrange fundraisers with
cloaked donors while he was
working for the state.
That arrangement initially
cloaked the public relations» firm's
work by classifying the public relations assistance as «attorney - client communication
work product.»
The «invisibility
cloaks» being made in labs today can hide objects when viewed from a wide range of directions and in visible light — both considered implausible developments when the first
working invisibility
cloak was demonstrated just four years ago.
Engineers are
working with metamaterials to create super-microscopes, optical computers, and yes, invisibility
cloaks.
Our
work has relevance to exotic lens design and to the
cloaking of objects from electromagnetic fields.
That reads a bit like a line from a Harry Potter / Star Trek mash - up, but researchers have been
working on real invisibility
cloaks for a while now.
That's because relativistic effects kick in as you approach the speed of light, preventing the
cloak from
working.
In a follow - up paper, Halimeh studied
cloaks that operate at multiple frequencies, and found that a slightly different effect also prevents them from
working at relativistic speeds.
Said Dr Qiu, «This is the first time that such a
cloak has been proven to
work effectively, based on thermotics.
Researchers crossing Albert Einstein's theory of relativity with the theory of invisibility
cloaks have discovered such devices won't
work at high speeds
But the new
work, by a team of engineers from the French ground improvement company Ménard and physicists from Aix Marseille Université in France, is the first to put a seismic wave
cloak to the test.
Pendry's
work on metamaterials is notoriously complicated and serious, so it is ironic that the most famous implication of his research — the invisibility
cloak — began as a joke.
For
cloaking to
work, the metal shapes stamped on the metamaterial must be smaller than the wavelength of the electromagnetic radiation that is aimed at them.
How It
Works: Seismic waves propagate through the Earth much as sound waves move through air, so the concept is similar to the sound
cloak.
It was in the summer of 2008 that Zhang's group took the first small step toward creating a real - world invisibility
cloak by fabricating the first optical metamaterial to
work in three dimensions.
Researchers from QMUL's School of Electronic Engineering and Computer Science,
worked with UK industry to demonstrate for the first time a practical
cloaking device that allows curved surfaces to appear flat to electromagnetic waves.
As well as being visible themselves, these
cloaks only
work for certain viewing directions.
Invisibility
cloak invented, teleportation
works (but not for you), Einstein the swinger, and more.
In their
work with metamaterials, Zhang and his research group have generated the world's first optical invisibility
cloak, mimicked black holes, and created the first plasmonic nanolasers.
Indeed, Xiang Zhang, a physicist at the University of California, Berkeley, questions whether the technique really counts as
cloaking, as it
works only if the fog is already thick enough to obscure the details of an object and everything behind it.
Now, Robert Schittny, Martin Wegener, and colleagues at Karlsruhe Institute of Technology in Germany have developed a
cloak that has all of those properties — although it
works only in foggy or «diffusive» conditions.
It is the first successful
cloaking experiment, but it
works only in two dimensions — the cylinder is detectable when viewed from above.
In vacuum, air, and other surroundings supporting ballistic light propagation according to Maxwell's equations, invisibility
cloaks which are macroscopic, three - dimensional, broadband, passive, and that
work for all directions and polarizations of light, are not consistent with the laws of physics.
In 2011, a team of researchers developed a particularly simple carpet
cloak made of two crystals that could hide centimeter - sized objects, but it
worked only for light polarized in one direction.
Within months, researchers had made a
cloak that
worked for microwaves.
«It's a very nice twist» on the spherical
cloak, says physicist John Pendry of Imperial College London, one of the physicists who first
worked out the idea.
The new
work by Levitov and his colleagues provides one piece of such a system — and potentially of other advanced electro - optical systems, he says, such as negative - refraction materials that have been proposed as a kind of «invisibility
cloak.»
The original
cloak can hide an object from light coming from any direction, but it
works only for light of a single wavelength.
SCNU professor Ao Xianyu, writing on behalf of COER, says that
work on absorption and
cloaking aren't really so disparate, arguing that the mathematical tools of transformation optics are applicable to designing better absorbers.
The artist initially painted the woman with a right arm and hand holding a disk but then covered them with her
cloak in the final
work.
Real invisibility
cloaks are rather complex and
work in certain situations only.
This understanding of how HIV - 1's «invisibility
cloak»
works could lead to the development of effective vaccines against HIV - 1.
Since this ethereal muse always looks spot on
cloaked in an alchemical mix of layers and textures, hitting a vintage shop is the perfect way to
work your magic.
Do not try to use the internet's
cloak of anonymity as some sort of advantage to your end because it simply does not
work that way.
This rankles family patriarch Hap (Rob Morgan), a preacher and a man of stature
cloaked in humility, unable to reconcile the years of backbreaking
work on land he will never own.
In the post - «Bourne» era, the idea of a lone operative
working in the shadows, holing up in rustic European towns while dodging impeccably cutthroat, improbably glamorous enemies, seems almost quaint, even kitschy — the
cloak - and - dagger equivalent of a Hummel figurine.
Like its title suggests, the film is literally
cloaked in darkness, aptly depicted through some fine cinematography
work which is additionally impressive and harsh, in a good way, when it ventures out into the light above.
The Hulk (Ruffalo) has disappeared, Doctor Strange (Cumberbatch)
works under his
cloak of magic, Black Panther (Boseman) is busy with Wakanda, and the Guardians of the Galaxy are off practicing their vaguely mercenary do - gooding in the depths of the cosmos.
He shoots most of the spectacular money moments
cloaked in darkness, as if to cover up shoddy CG
work.