SV: Capacity of the brain

Ronnie Sahlberg ronnie.sahlberg at mbox301.swipnet.se
Fri Oct 22 16:47:03 EST 1999



Ronnie Sahlberg wrote:
> 
> Erik Max Francis wrote:
> >
> > Ronnie Sahlberg wrote:
> >
> > > Who needs fancy stuff like that. FTL communications are much easier:
> > > look at the heat-dissipation equations.
> > > Heat travels infinitely fast, that's much much faster than light.
> > > Using heat-dissipation for communications would allow intergalactic
> > > communication systems with close to zero RTT.
> >
> > Uh, you're obviously not using the right equations.
> 
> Well actually I am, but the equation is faulty. It is only a good
> approximative model
> of the physic characteristics of heat, not an exact description of.
> 
> The easiest example is fot the heat-dissipation equation
> in one dimension:
> Assume an infinite long string with an equal temperature at every point
> of the string.
> Apply heatpulse at point p at time t=0 of said string.
> 
> Examine function describing heat distribution along the string.
> Examine value of this function at t=epsilon (epsilon approaching 0)
> especially "interesting" are the values of this function infinitely far
> from
> point p. It is small but non-zero.
> 
> ergo: heat travels at infinite speed (according to famous
> partial-diff-equation).
> 
> br ronnie sahlberg

I.e.: Assuming the heat-dissipation equation is correct, the problem
of FTL communication is reduced to the engineering task of designing a
very accurate and sensitive thermometer.



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