Since the 1933 classic “The Invisible Man” the latest installment of Harry Potter, devices that bring the invisibility had been part of the popular fantasy film. In recent years, the scientists used special types of ’target’ materials have shown that fantasy invisibility could one day become reality.

Invisibility is fashionable in 2008, but according to a new paper in the latest issue of the journal Optics Express, current techniques are already obsolete.

Some materials under a cloak of invisibility allows objects invisible to be seen again and a group of Chinese researchers are already working on an “anti-cloak ’to cancel their invisibility.

“Concealment is a major problem since the invisibility can help survival in hostile environment,” said Chen Huanyang Shanghai Jiao Tong University in China.

That is why we set out to break it.

Metamaterials can sometimes be effectively invisible because of how they interact with light. All materials scatter, bounce, absorb, reflect and otherwise alter the light rays that strike them.

We perceive color, for example, because different materials and coatings to interact with light differently. Transformation of the media cloaks are special materials that can bend light so much really happens throughout the complete object. In 2006, scientists from Duke University in the laboratory showed that an object of metamaterial is partly invisible when viewed using microwaves.

Sounds great, right? Not so fast. Invisibility, and that has been achieved so far in the laboratory is very limited. It works, but only by a narrow band of wavelengths of light. No one has yet found a way to make objects invisible to the wide range of wavelengths our eyes are adapted to see, said Chen.

An even greater problem for anyone who has aspirations to be hidden in public one day that the invisibility is achieved through the transformation of the media is a two-way street. With the light that penetrates not a perfect invisibility cloak, there would be no way of a person invisible to see the outside. In other words, people would be invisible also blind – is not exactly what Harry Potter had in mind.

But now, Chen and his colleagues have developed step to partially cancel the invisibility of the layer of camouflage effect. His “anti-blanket” would be a material with optical properties ideally suited to a cloak of invisibility. (In technical jargon, a layer anti-anisotropic would be negative refractive index is the material that corresponds to the impedance of the positive index of refraction of the invisibility cloak).

While a cloak of invisibility to bend light around an object, any region that came into contact with the anti-layer guide to some light back so that it became visible. This would enable an observer to see the invisible foreign press a layer of anti-mantle material in contact with an invisibility cloak.

“With the fight against the mantle, Potter can see outside if you want,” said Chen, who led the research along with colleagues at the University of Shanghai Jiao Tong University and the Hong Kong Science and Technology.

This work was funded by the National Natural Science Foundation of China, the Minister of National Education for the Changjiang Scholars Program and Innovative research team at the University of Hong Kong and the Central Allocation Fund.

The first beam in the Large Hadron Collider at CERN has turned around the full 27 kilometers of the world’s most powerful particle accelerator at 10h28 this morning. This historic event marks a key moment in the transition of more than two decades of preparation for a new era of scientific discovery.

“It’s a fantastic moment,” said LHC project leader Lyn Evans, “now we can look forward to a new era of understanding on the origins and evolution of the universe.”

Launching a new particle accelerator is more than just flipping a switch. Thousands of each element must work in harmony, times have to be synchronized with one billionth of a second, beams and a fine human hair has to be placed on the head in a collision. Today’s success puts a tick next to the first of these measures, and in the coming weeks as the LHC operators to gain experience and confidence with the new machine, the machine of the acceleration of the systems will game, and the beams will collide to allow the research program to begin.

After colliding beams have been established, there will be a period of measurement and calibration for the four major LHC experiments, and the new findings may begin to appear around a year. Experiments at the LHC will allow physicists to complete a journey that started with Newton’s description of gravity. The gravity acts on mass, but so far science can not explain the mechanism that creates mass. Experiments at the LHC will provide the answer. LHC experiments will also seek to probe the mysterious dark matter in the universe – visible matter seems to account for only 5% of what must exist, while about a quarter is believed to be dark matter. Will investigate why the nature of the preference for matter over antimatter, and that the probe matter as it existed at the beginning of time.

“The LHC is a discovery of the machine,” said CERN Director General Robert Aymar, “his research program has the potential to change our point of view of the universe deeply, continuing a tradition of the curiosity that as old as humanity same. ”

Tributes have come from laboratories around the world who have contributed to the success of today.

“The completion of the LHC marks the beginning of a revolution in particle physics,” said Pier Oddone, director of the U.S. Fermilab. “We congratulate CERN and its member countries to create the foundation for many nations to join in this great enterprise. We appreciate the support that the DOE and NSF have provided throughout the construction of the LHC. In the United States is proud to have contributed to acceleration and detectors at the LHC, along with thousands of colleagues around the world with whom we share this search. ”

“I congratulate you on the launch of the Large Hadron Collider,” said Atsuta Suzuki, Director of Japan’s KEK laboratory, “This is a historic moment.”

“It’s been a fascinating and rewarding experience for us,” said Vinod C. Sahni, director of India, Raja Ramanna Center for Advanced Technology, “I extend our best wishes to CERN for a productive run with the LHC machine in the years to come.”

“As some say,” A short trip of a proton, one giant leap for mankind! “Fluids and indeed all of Canada is pleased to witness this amazing feat,” said Nigel S. Lockyer, Director of Canada ’S Fluids lab. “Everybody has participated CERN, but welcomed especially by bringing the world together to embark on this incredible adventure.”

On a visit to CERN shortly before the LHC for the implementation of United Nations Secretary General, Ban Ki-moon said: “I am very honored to visit CERN, a scientific institution very valuable and a shining example of what community internationally can achieve through joint efforts and contribution. I wish to convey my deepest admiration to all scientists and wish them every success for his research for the peaceful development of scientific progress. “

The next big breakthrough in computer processors will move from today the two dimensions of the three-dimensional chip circuits, and the first three-dimensional synchronization circuits are running at 1.4 gigahertz at the University of Rochester.

Unlike previous attempts at 3-D chips, the chip Rochester is not simply a number of processors stacked on top of one another. It was designed and built specifically to optimize all processing functions vertically through multiple layers of processors, like regular chips optimize functions horizontally. The design means tasks such as Synchronicity, power distribution, and long-distance signaling are all fully operational in three dimensions for the first time.

“I call it a bucket now, because it is not just a chip more,” said EBY Friedman, Distinguished Professor of Electrical and Computer Engineering at the Faculty of Rochester and program director of the processor. “This is the method of calculation is going to have to do in the future. When the chips are flush against each other, they can do things they could never do with a 2D chip.”

Friedman, in collaboration with engineering students Vasilis Pavlidis, said that many in the industry of integrated circuits, we are talking about the limits of miniaturization, a point at which it will be impossible to package chips closer to each other and, therefore limit the ability of future processors. “He said that a number of integrated circuit designers anticipate sometime in the enlargement of the third dimension, stacking transistors on top of each other.

But with the vertical expansion will come a series of difficulties, and Friedman said that the key is a design in 3-D chip where all the layers interact as a single system. Friedman said that all three levels of 3-D chip to act in harmony is like trying to design a system to monitor traffic for all United States-and then two more layers United States over the first and somehow that every bit of traffic from any point on any level at its destination at any other level, and at the same time coordinate the smuggling of millions of other drivers.

That complicate the outcome of the two layers of U.S. with something like China and India, where the rules of driving and the roads are very different, and the complexity and challenge of designing a control system to work in any single chip beginning to be evident, Friedman said.

As each layer can be a different processor with a different function, such as converting audio files to MP3 or detection of light for a digital camera, Friedman said that the 3-D chip is essentially a circuit board folded up into a small package. He said that the chips inside something like an iPod can be compacted to one tenth of its current size with ten times the speed.

What makes it all possible is the architecture Friedman and his students designed, which uses many of the tricks of regular processors, but also the accounts of the various impedances that can be produced from chip to chip, operating speeds different , And different power requirements. The manufacture of the chip is unique, too. Manufactured at MIT, the chip must have million holes drilled into the insulation separating the layers in order to allow the multitude of vertical connections between transistors on different layers.

“Are we going to hit a point where we can not scale integrated circuits any smaller? Horizontally, yes,” said Friedman. “But we will begin to climb vertically, and that will never end. At least not in my life. Talk to my grandchildren about that.”