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> Jupiter brains must be hollow spheres. Reason for this: Volume grows cubically, surrounding area has just quadratic growth. See the first link. As well, Robi
by gwern 10y ago
> Jupiter brains must be hollow spheres. Reason for this: Volume grows cubically, surrounding area has just quadratic growth.
See the first link. As well, Robin Hanson has some discussions of scaling heat dissipation with optimal pipe technology & branching on his OB blog and in the book form of _Age of Em_.
- nabla9 10y agoAny technical solution like convection pipes just rearranges the area needed for heat transfer around. If you have have effective heat transfer you can have more compact computing core. For example, massive radiator disk with edge towards the sun. I think the choice depends on whether brains are latency limited, local computation limited or communication volume limited. I speculate that they are local computation limited in the largest scale.