O'Neill's data

Contained in the same paragraph as below:

"The principal centers for these studies have been the U.S. Navy Medical
Center at Pensacola, Florida and the Soviet Space program's ORBIT
centrifuge facility in the U.S.S.R. Although there are limitations to
the completeness with which such earthbound tests truly duplicate
conditions in space, there appears to be general agreement on the
following points: first, almost no one has any difficulty in adjusting
to rotation rates of one per minute or less. Second, as the rate climbs
above two, three, four rotations per minute and even higher, more and
more people find it difficult to adjust......

Snip (lazy typist syndrome)

...In the case of a habitat in space, the range of interest is between
one and three rotations per minute - high enough to be of concern, but
low enough that most of the subjects so far tested have been able to
adapt to it, usually within a day or two....

Snip

.....For the earliest habitats, economy appears to dictate that a
rotation rate of about 2 RPM be chosen, for Earth normal-gravity, and
that the applicants for jobs in the early habitats undergo tests to
determine whether they are unusually vulnerable to motion sickness in
space."

The first part gives you a place to start searching,

also
google for - habitat rotation studies
brings up
http://www.nas.nasa.gov/About/Education/SpaceSettlement/spaceres/II-1.html
(Thanks to Al Globus) which leads to a reference

Billingham, J.: Physiological Parameters in Space Settlement Design.
Third Princeton/AIAA Conference on Space Manufacturing Facilities,
Princeton, NJ., Paper 77-549, May 9-12, 1977.

that should give you a starting point.
(also try google for artificial gravity rotation)

Brett

Saatvik Agarwal wrote: