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.



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