I thought of the great precessional
cycle that the pole of the earth describes.
STIR relies on T1 relaxation differences instead of precessional
frequency differences to cancel the signal from fat, thereby minimising susceptibility effects during fat-suppressed imaging.
When fat and water molecules occupy the same voxel, differences in precessional
frequency quench MR signal in that voxel during opposed-phase gradient-echo MR imaging.
His tales are filled with haunting astronomical images--a waning crescent moon casting its feeble light on moldering gravestones; frosty Aldebaran seeming to balance on a steeple over an ancient, worm-bedeviled Massachusetts seaport; Polaris, steeped in prehistoric secrets from its 26,000-year precessional
cycle, "winking hideously like an insane watching eye.
This value is in the range of the precessional
cycle of the Earth's orbit.
pcn] be the precessional
angular speed, and let [v.
So, it is important to build the wideband radar echo model of midcourse precessional
From the perspective of the precessing magnetic moments, the biomagnetic field generated by neuronal activity also contributes to the applied magnetic field, thereby altering their precessional
The best studied is 56 Ari  whose magnetic axis has a precessional
period of 5 years.
THE OPTIMIZING OF THE TRANSMISSION SYSTEM BY USING PRECESSIONAL
The importance of precessional
signals in the tropical climate.
However, all orbital cycles, including the 19 000 to 23 000-year precessional
cycle, were operative regardless of which climatic conditions dominated and what soil developed (Rutter et al.