--- "John G. Rose" <[EMAIL PROTECTED]> wrote:

> There's Newtonian and relativistic intelligence.  Probably can model
> intelligence formulas after physics because without physics there are no
> bits so time needs to be in there as well.  Intelligence is affected by the
> speed of light as data transmission rates max out in relation to it.  No?
> If you have a cognition engine it operates over time and it will have units.

If we measure intelligence in bits, then we can place limits on what can be
achieved.  Landauer's principle says that each irreversible bit operation
(such as a bit assignment) requires kT ln 2 energy, where k is Boltzmann's
constant and T is the temperature. 
http://en.wikipedia.org/wiki/Landauer's_Principle

At the temperature of the universe, 2.725 K, 
http://en.wikipedia.org/wiki/Cosmic_microwave_background_radiation
each bit operation requires 2.6e-23 Joules.

The mass of the universe is the subject of debate,
http://hypertextbook.com/facts/2006/KristineMcPherson.shtml

so let's assume 25% of critical density, which according to
http://www.astronomynotes.com/cosmolgy/s9.htm is 3H^2/(8 pi G) = 1.06e-26
Kg/m^3 (where H is Hubble's constant and G is the gravitational constant). 
Astronomers mostly agree that the universe is about 4% visible matter, 21%
ordinary dark matter and 75% "dark energy" responsible for the outward
acceleration of the galaxies.  (I think that dark energy is actually ordinary
gravity.  An observer falling into a black hole will observe nearby objects
appear to accelerate away).  So (returning to the big bang model) for a sphere
of radius 13.7 billion lightyears, this gives a mass of 7.5e52 Kg.

If we convert this mass to energy by E = mc^2 we have 6.75e69 J.  This gives
us 2.6e92 bit operations before the universe reaches thermodynamic
equilibrium.

We must use them wisely.



-- Matt Mahoney, [EMAIL PROTECTED]

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