From: Robert J. Bradbury (bradbury@aeiveos.com)
Date: Sat Apr 05 2003 - 05:46:45 MST
(I'm leaving aside comments on many of Lee's comments since we will
most likely deal with them offlist and perhaps produce a paper).
On Fri, 4 Apr 2003, Lee Corbin wrote:
> Well, the disassembly I had in mind was just scrambling---
> and sadly happens soon after any kind of death. Getting
> mangled still far above the level of constituent atoms
> usually results in death.
Granted -- I suspect that Rafal or Anders could comment more
authoritatively on this.
I said:
> > But my read of what it seems like robust nanotech enables is
> > that it need not be that way (there are limits but it seems
> > like they involve ability to deliver energy and remove heat).
Lee said:
> I don't think that I understand you here. I should start a new
> thread about this, however.
I'm wrestling with the limits-of-known-physics problems. Eric's
design for a 1 cm^3 nanocomputer requires 100,000 watts of power.
Now Eric may know how to deliver that much power to that small of
a volume but I certainly don't. Nanotech -- even running at
extremly efficient rates does produce heat. Eric (and Kieth Henson)
did patent the most efficient heat removal system I'm aware of
[Henson, H. K., and K. E. Drexler. (1988) Heterodensity heat
transfer apparatus and method. U.S. Patent #4,759,404] -- it
is discussed to some extent in Nanosystems.
Bottom line (for my thinking) is that if you are going to measure
the location and type of trillions (or more) atoms one is going to
have to wrestle with some significant power delivery and heat removal
problems. To the best of my knowledge nobody has looked at this.
Its impact may be that there may be some very significant time
constraints on how fast one could do even a destructive upload.
It could well be that one might be consumed by ones internal
bacteria before a reliable upload could be accomplished.
Of course one can work around this by working at cryogenic
temperatures -- but then that places severe constraints on
the amount of heat the uploading process can generate.
Uploading (or teleporting) might well end up having to be
a *very* slow process.
Robert
This archive was generated by hypermail 2.1.5 : Sat Apr 05 2003 - 05:54:26 MST