<div dir="ltr"><div><font size="4">In yesterday's issue of the journal Science there is a research article about IBM's new chip called "TrueNorth" that has logical architecture similar to the mammalian neocortex. It has 256 million electronic synapses; that's about as complex as the brain of a bee. The power density of TrueNorth is only .02 Watts per cm^2 of chip area, for a conventional CPU it it's close to 100 Watts. </font><font size="4">Terrence J. Sejnowski, director of the Salk Institute’s Computational Neurobiology Laboratory said "</font><font size="4">The TrueNorth chip is like the first transistor, </font><font size="4">it will take many generations before it can compete, but when it does,
it will be a scalable architecture that can be delivered to cellphones". </font><font size="4">Horst Simon, deputy director of the Lawrence Berkeley National Laboratory said "</font><font size="4">It is a remarkable achievement in terms of scalability and low power consumption". The following is the abstract of the August 8 2014 article:<br>
<br><i>"Inspired by the brain’s structure, we have developed an efficient,
scalable, and flexible non–von Neumann architecture that
leverages contemporary silicon technology. To
demonstrate, we built a 5.4-billion-transistor chip with 4096
neurosynaptic
cores interconnected via an intrachip network
that integrates 1 million programmable spiking neurons and 256 million
configurable
synapses. Chips can be tiled in two dimensions
via an interchip communication interface, seamlessly scaling the
architecture
to a cortexlike sheet of arbitrary size. The
architecture is well suited to many applications that use complex neural
networks
in real time, for example, multiobject detection
and classification. With 400-pixel-by-240-pixel video input at 30
frames
per second, the chip consumes 63 milliwatts.
</i>"<br><br></font></div><font size="4"> John K Clark <br></font><div><font size="4"><br><br></font><br><br><sup><br></sup></div></div>