Per - Temmuz 13, 2006

Cmt - Aralık 10, 2005

Quantum bubbles are key to extreme computing

Because each qubit carries two values, a quantum computer with two qubits could carry out four parallel calculations, one with three qubits eight calculations, and so on. "I see no major technical obstacles to the system I envisage working with 100 qubits," says Yao.

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Pzt - Kasım 21, 2005

Let chaos keep your secrets safe

To recreate the chaos you have to send the chaotic light signal made by your first laser, complete with encoded message, to a second laser that is essentially identical: made from the same batch of semiconductor by the same manufacturer and operated at the same temperature and current biases and with the same fraction of light fed back into the cavity (see Diagram).

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Posted at 11:13 PM     Read More  

Cmt - Kasım 19, 2005

Paz - Kasım 13, 2005

Human life: The next generation 

The exponential growth of computing goes back over a century and covers five major paradigms: electromechanical computing as used in the 1890 US census, relay-based computing as used to crack Nazi cryptography in the early 1940s, vacuum-tube-based computing as used by CBS to predict the election of Dwight Eisenhower in 1952, discrete-transistor-based computing as used in the first space launches in the early 1960s, and finally computing based on integrated circuits, invented in 1958 and applied to mainstream computing from the late 1960s.

Mass use of inventions 

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Paz - Ekim 30, 2005

Balloon beams broadband internet from stratosphere 

Video footage (28MB Mpeg) recorded at the test site – the Swedish Space Corporation's space centre at Esrange, 200 kilometres below the Arctic Circle – shows the University of York researchers testing the optical tracking system on the balloon
. 

Posted at 08:39 PM     Read More  

Attack of the quantum worms 

"It's reminiscent of the ways people build military systems that are under attack, which is to keep them shut down a great deal of the time - and then suddenly open up and do something," says Chip Elliott, who works on quantum network security for BBN Technologies in Cambridge, Massachusetts, and helped set up US defence research agency DARPA's quantum cryptography network.

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Sal - Ağustos 30, 2005

Electronic paper debuts in Tokyo 

As well as holographic displays and integrated speech processing and pervasive computing, you could add electronic paper to the set of key technologies that seem to be always just out of reach.

 

Posted at 11:33 PM     Read More  

The prime number hunters close in 

One of the most important, the RSA system, is based on prime numbers - big ones, about a hundred digits long. The RSA system is employed in most computer operating systems, built into the main protocols for secure internet communication, and widely used by governments, corporations and universities.
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Paz - Ağustos 14, 2005