X-Message-Number: 25136 From: Date: Tue, 23 Nov 2004 01:31:36 EST Subject: Re: CryoNet #25084 Uploading From T. Donaldson: > > I'm not metaphysically opposed to uploading, I just think it's > unlikely to be a way to save ourselves in any relatively naar > future (say a few hundred years). > FPGA chips (field programmable gate array) may contain more than 4 millions gates. One neuron may be modeled with on the order of 100 gates. So today chips may sustain 40 000 neurons. The speed is at least 1000 time what can do a biochemical system so the chip can be put in batch mode and simulate 1000 different neuron blocks. Its total power is then 40 millions of neurons. A person could then be simulated by 100 chips or so. We can put them on a single printed circuit board. This is present day technology, with components you can order now at market price, not some far away technology. You could argue that 100 gates/ neuron is not sufficient, that Shanon theorem would dictate only 100 batches to smoot out any digital effect,... So a "perfect system woul have ten more chips each ten more powerful and these would be marketed in five years only... The essence of the problem would not change: we have the technology now. Yvan Bozzonetti. Content-Type: text/html; charset="US-ASCII" [ AUTOMATICALLY SKIPPING HTML ENCODING! ] Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=25136