Re: unfortunately, it's old Message #5 Posted by PeterP on 2 Apr 2009, 11:08 a.m., in response to message #4 by Michael de Estrada
hmm, some people beg to differ. I recently heard Ray Kurzweil at a conference in New York and then went on to read his books. He has very convincing arguments that we will achieve human brain capacity calculations in our life-time (and far beyond).
He estimates the processing power of the human brain to be between 10^14 and 10^16 MIPS (100 bn neurons x 1000 synapes per neuron x 200 calculations per second)
Quote: The human brain has about 100 billion neurons. With an estimated average of one thousand connections between each neuron and its neighbors, we have about 100 trillion connections, each capable of a simultaneous calculation. That's rather massive parallel processing, and one key to the strength of human thinking. A profound weakness, however, is the excruciatingly slow speed of neural circuitry, only 200 calculations per second. For problems that benefit from massive parallelism, such as neural-net-based pattern recognition, the human brain does a great job. For problems that require extensive sequential thinking, the human brain is only mediocre.
With 100 trillion connections, each computing at 200 calculations per second, we get 20 million billion calculations per second. This is a conservatively high estimate; other estimates are lower by one to three orders of magnitude. So when will we see the computing speed of the human brain in your personal computer?
(the whole article can be found here)
Another related article about this can be found on his very informative web-page The Law of Accelerating Returns
His book, 'The Singularity is Near' is definitely worth a read and I would guess the crowed here would generally enjoy it. A Wiki-summary can be found here
Last but not least, I found the slides he showed during his presentation. They are worth a quick peak. I find they quite convincingly show the smoothness and predictability of exponential growth. Highly recommend to take a peek...Graphs & Slides
Cheers
Peter
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