Kalpana one

I couldn't find a publication date on this. Does anyone know?
We might invite the writers of the paper here to discuss it and answer
our questions.

Ralph wrote
>>... its a shame to use artificial light for crop raising when
>>theres so much natural sunlight. Agricultural is by far you
>>main power requirement. A way around this is to attach solar
>>collectors to the outside of the colony's hull and divert the
>>sunlight into the agricultural areas with fiber optics.

It does seem strange to allow sunlight into the habitable areas, but
use artificial light for agronomy. I wonder why was this was chosen?
Also, I can't see how sunlight enters the habitable area; From the
endcaps which are parallel to the sunlight's incoming direction, with
no mirrors?
With no light pipes or directed lighting, we must assume that all
lighting in the inner low-G decks is artificial. Again, with light
pipes, sunlight can be brought in anywhere, with no moving parts.
It'd be interesting to see a study of the relative mass and cost of
conventional electric lighting and light pipes for different
applications.

Al Globus wrote:
> The exterior of the hull is rotating at 2rmp, giving you 1g
>away from the colony. Of course, as you move away from the
>hull the force becomes greater.

Understood. Was this intended to rebut Ralph's suggestion for exterior
light collectors? Sure, they'd be under outward pull, but they could be
much smaller than the huge "petals" of O'Neill's Island 3.
One reason the Kalpana 1 designers might not like it is the need to
turn them away from the light-pipe inlets. Another suggestion comes to
mind: swing them only a bit so they direct light onto PV arrays instead
of the inlets.