نتایج جستجو برای: nutation

تعداد نتایج: 487  

Journal: :Magnetic resonance in medicine 2007
Qin Qin John C Gore Mark D Does Malcolm J Avison Robin A de Graaf

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...

2015
Won-gyu Yoo

[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...

Journal: :Symposium - International Astronomical Union 1979

2003
Simon C. Drew John F. Boas John R. Pilbrow Peter D. W. Boyd Parimal Paul Christopher A. Reed

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...

2012
Hiroshi Ohki Nobuo Nakamura

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...

2015
T. Albrecht H. M. Blackburn J. M. Lopez R. Manasseh P. Meunier

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...

Journal: :Journal of magnetic resonance 2003
Hiroshi Hatanaka Manabu Sugiyama Noriyuki Tabuchi

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...

Journal: :Physical Review B 2022

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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