On 7/25/2020 1:56 PM, John Clark wrote:
On Sat, Jul 25, 2020 at 3:23 PM Lawrence Crowell
<[email protected]
<mailto:[email protected]>> wrote:
/> This is no-go unless the problem of ice crystal expansion is
solved./
True, but that problem doesn't need to be solved right now, it can be
left to future technology to figure out. The key question right now is
will my brain enter a turbulent state when it is frozen or will the
fluid flow be laminar? If it's turbulent then small changes in initial
conditions will result in large changes in outcome and I'm dead meat,
even nanotechnology couldn't put Humpty Dumpty back together again.
But if the freezing process is laminar then figuring out what things
were like before they were frozen would be pretty straightforward.
Fluid flow stops being smoothly Laminar and starts to become
chaotically turbulent when a system has a Reynolds number between 2300
and 4000, although you might get some non chaotic vortices if it is
bigger than 30. You can find the approximate Reynolds number by using
the formula LDV/N. L is the characteristic size we're interested in,
we're interested in cells so L is about 10^-6 meters. D is the density
of water, 10^3 kilograms/cubic meter. V is the velocity of the flow,
during freezing it's probably less than 10^-3 meters per second but
let's be conservative, I'll give you 3 orders of magnitude and call V
1 meter per second. N is the viscosity of water, 0.001
newton-second/meter^2, If you plug these numbers into the formula you
get a Reynolds number of about 1. And 1 is a lot less than 2300 so it
looks like any mixing caused by freezing would probably be laminar not
turbulent, so you can still deduce the position where things are
supposed to be.
Actually to my mind the most serious obstacles to the success of my
program are not scientific at all, they are these:
1) Will my brain really be frozen soon after my death?
2) Will my brain remain frozen until the age of nanotechnology?
3) When it becomes possible to retrieve the information in my frozen
brain will anybody think I'm worth the trouble to actually do it?
Concerning that last one, I think it will either be impossible to
revive me or cheap and easy to do , the time when it will be possible
but expensive will be very short. I'm willing to concede that my value
to the Jupiter Brain that will be running things then will be almost
zero, but my (perhaps hopelessly optimistic) hope is that it is not
precisely zero. Anyway, given a choice between no chance and a slim
chance I'll pick a slim chance every time.
Or seeing that it's expensive to revive you, the Jupiter Brain decrees
this shall be repaid by putting your head on a laborbot mining diamonds
in Africa for the next 100yrs. And laborbots don't have to be very
smart, so it's ok that your revived IQ is in the 60's.
Brent
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