Research Topics 2011

New Brain-type Device with Human-like Memorizing and Forgetting Behavior

-A Single Artificial Device Realizes Complex Biological Synaptic Behavior-

June 27, 2011

This research was conducted by
Takeo Ohno, Tohru Tsuruoka, Kazuya Terabe, Tsuyoshi Hasegawa, Masakazu Aono and James K. Gimzewski

“Memorization of necessary information” and “forgetting of unnecessary information”, which are key features of neural behaviors in the human brain, has been achieved by newly-developed synaptic device. Since the size of the device is in the same order of that of a biological synapse, it is expected that the device would contribute for developing artificial intelligence, performance of which is as high as that of the human brain.

fig. 1

Figure 1. Memorization model of the human brain. Rehearsal with the higher repetition rate causes the long-term memory (red line), and that with lower repetition rate only causes the short-term memory (blue line)

fig. 1

Figure 2. Experimental result of image storing using different repetition rates. ‘2’, which was inputted with the lower repetition rate, was stored in the short-term memory, resulting in the decay of the memorization level after the inputs. On the other hand, ‘1’, which was inputted with the higher repetition rate, was stored in the long-term memory maintained persistently.

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