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TECH SPACE
New way to write magnetic info could pave the way for hardware neural networks
by Staff Writers
London, UK (SPX) Nov 27, 2017


Illustration of the atomic force microscope tip writing a nanowire.

Researchers have shown how to write any magnetic pattern desired onto nanowires, which could help computers mimic how the brain processes information.

Much current computer hardware, such as hard drives, use magnetic memory devices. These rely on magnetic states - the direction microscopic magnets are pointing - to encode and read information.

Exotic magnetic states - such as a point where three south poles meet - represent complex systems. These may act in a similar way to many complex systems found in nature, such as the way our brains process information.

Computing systems that are designed to process information in similar ways to our brains are known as 'neural networks'. There are already powerful software-based neural networks - for example one recently beat the human champion at the game 'Go' - but their efficiency is limited as they run on conventional computer hardware.

Now, researchers from Imperial College London have devised a method for writing magnetic information in any pattern desired, using a very small magnetic probe called a magnetic force microscope. With this new writing method, arrays of magnetic nanowires may be able to function as hardware neural networks - potentially more powerful and efficient than software-based approaches.

The team, from the Departments of Physics and Materials at Imperial, demonstrated their system by writing patterns that have never been seen before. They published their results in Nature Nanotechnology.

Dr Jack Gartside, first author from the Department of Physics, said: "With this new writing method, we open up research into 'training' these magnetic nanowires to solve useful problems. If successful, this will bring hardware neural networks a step closer to reality."

As well as applications in computing, the method could be used to study fundamental aspects of complex systems, by creating magnetic states that are far from optimal (such as three south poles together) and seeing how the system responds.

Research paper

TECH SPACE
Scalable clusters make HPC development easy as Raspberry Pi
Los Alamos NM (SPX) Nov 22, 2017
A quest to help the systems software community work on very large supercomputers without having to actually test on them has spawned an affordable, scalable system using thousands of inexpensive Raspberry Pi nodes. It brings a powerful high-performance-computing testbed to system-software developers, researchers, and others who lack machine time on the world's fastest supercomputers. "It's ... read more

Related Links
Imperial College London
Space Technology News - Applications and Research


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