"Alex Terrell" wrote in message
ups.com...

This may be the case for raidation shielding, but not for impact
shielding, where a multilayer design is far far superior, but makes
heat rejection problematic.

And I think probably for that reason is why multilayer designs aren't
assumed for Island One.

The natural illumination option needs to reject more
heat,

Why do you assume this? The primary mirror can be coated with an
optical filter to absorb non wanted frequencies. What is then
cioncentrated and beamed in to the cylinder is close to 100% useful. In
comparison, no artifical lighting comes close to being this efficient.

Just trying to let the other side of this debate have a point.


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Regards,
Mike Combs
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By all that you hold dear on this good Earth
I bid you stand, Men of the West!
Aragorn