نتایج جستجو برای: nutation
تعداد نتایج: 487 فیلتر نتایج به سال:
Conventional single-voxel localization for MR spectroscopy (MRS) is restricted to selecting only rectangular-shaped regions of interest (ROIs). The complexity of tissue shapes of interest and the desire to maximize the signal-to-noise ratio (SNR) while minimizing partial-volume effects require more sophisticated localization techniques. A group of spatially selective RF pulses are proposed in t...
[Purpose] We investigated the effects of individual strengthening exercises for the stabilization muscles on the nutation torque of the sacroiliac joint in a sedentary worker with nonspecific sacroiliac joint pain. [Subject] A 36-year-old female complained of pain in the sacroiliac joints. [Methods] The subject performed individual strengthening exercises for the stabilization muscles for nutat...
Electron spin transient nutation (ESTN) experiments show that the spin multiplicity of the ground state of C60 in frozen solution is a doublet with S ) /2. In purified samples, there is no evidence for excited states or other species with higher multiplicity. In the anions of C120O (n ) 2, 3, 4), where the CW EPR experiments have shown that a mixture of species is present, ESTN experiments conf...
2 3 Na two-dimensional nutation N M R was applied to N a t + *Zr 2 Si v P 3 _ v O, 2 with x = 0, 1, and 2. The nutat ion spectrum in each compound consists of two clearly separated peaks corresponding to the two crystallographically inequivalent sodium sites. In the compound with x = 2 the nuclear quadrupole coupling constants (e Qq/h) and the asymmetry parameters (rj) were by spectral simulati...
Direct numerical simulations of flows in cylinders subjected to both rapid rotation and axial precession are presented and analysed in the context of a stability theory based on the triadic resonance of Kelvin modes. For a case that was chosen to provide a finely tuned resonant instability with a small nutation angle, the simulations are in good agreement with the theory and previous experiment...
The authors present the detailed theory and the new results associated with the triple quantum (TQ) nutation and the line narrowing effect of the TQ resonance in the two-level NMR system which we reported previously. The TQ resonance is induced in the spin-locked system by the oscillating field produced by the sinusoidal phase modulation (PM) of the RF field. The theory predicts that the TQ nut...
It was demonstrated recently that on ultrashort time scales magnetization dynamics does not only exhibit precession but also nutation. Here, we investigate how nutation can contribute to spin switching leading towards ultrafast data writing. We use analytic theory and atomistic simulations discuss the behavior of ferromagnets antiferromagnets in high-frequency magnetic fields. In ferromagnets, ...
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