Proton irradiation and endometriosis.

Female rhesus monkeys given single total-body exposures of protons of varying energies developed endometriosis at a frequency significantly higher than that of nonirradiated animals of the same age. The minimum latency period was 7 years after exposure. The doses and energies of the radiation received were within the range that could be received by an aircrew member in near-earth orbit during a random solar flare event, leading to the conclusion that endometriosis should be a consideration in assessing the risk of delayed radiation effects in female crewmembers.

Empirical model of intracranial pressure and head motion resulting from a vibrating seated rhesus.

A series of experiments was designed to measure the head X and Z accelerations and the intracranial pressure in the unrestrained head of a rhesus monkey. The subject was exposed to a continuum of vibration frequencies from 2 to 35 Hz and peak acceleration amplitudes of 5, 10, 20, and 40 m/s2. The resulting data was used to build a frequency response model relating the head accelerations and pressures to the torso acceleration.