[en] This work describes the construction of a EPR cavity with tunable resonance frequency and coupling, particularly designed for double electron-nucleus resonance such as ENDOR and Dnp

[en] We study entanglement dynamics of two and three atoms stored in a common nonperfect cavity together with some other nonentangled atoms. It is guessed at first thought that the presence of nonentangled atoms would favor the decoherence process of the interested entangled atoms. We show, on the contrary, that it is not so. Namely, as results of a rigorous nonperturbative analysis, disentanglement rate of the interested atoms decreases with the increase of the number of nonentangled atoms. If the number of nonentangled atoms is sufficiently large, the entanglement of interested atoms could be protected efficiently.

[en] Scientific measurements of sound generation and radiation by musical instruments are surprisingly hard to correlate with the subtle and complex judgments of instrumental quality made by expert musicians

No abstract available

[en] These letters discuss the reliability of relaxation time measurement in vivo with reference to the paper by Johnson et al (1987) describing a method based on the minimum number (three) of scan images for calculation. (UK)

No abstract available

[en] NMR imaging principle is explained. Practice, more difficult, is presented and NMR imager is described. NMR spectroscopy in vivo and notion of spectroscopic chemical shift which is the basis of this spectroscopy are also presented

[en] The magnetic field distribution within a primitive cell of the equilibrium flux-line lattice of a uniaxial superconductor is obtained for any orientation of vortex axes within the crystal in intermediate fields. The numerical procedure is described for mapping of both longitudinal and transverse field components with respect to the vortex axes (or to the direction of the induction B, which is the same). For a general orientation of B within the crystal, the transverse field, which is comparable in value to the longitudinal one in low fields, becomes small with respect to B in intermediate fields, but remains comparable to the variable part of the longitudinal component. The nuclear magnetic resonance line shapes are discussed for an arbitrary orientation of an intermediate external field

[en] This invention relates to a known magnetic resonance method wherein, after excitation of magnetic resonance in nuclei in a cross-sectional slice of a body to be examined, a first gradient magnetic field, Gy, having a periodically reversing gradient in a first direction across the slice is applied in conjunction with a series of pulses of a second gradient magnetic field, Gx, in a second direction across the slice orthogonal to the first direction. The free induction decay signals and rephasing signals emitted by the nuclei as the first and second gradients are applied are sensed, the rephasing signal reversed to form, in effect, further free induction decay signals, and the first and further free induction decay signals arranged in a two dimensional array to give free induction decays for two orthogonal directions. Data relating to the planar region are then acquired by subjecting the signal array to a two-dimensional Fourier Transform process. The invention provides an improvement to such a method comprising varying the time between successive pulses of the second gradient Gx, thereby effectively to apply a spatial filter to the data for a given rate of data acquisition. (author)

[en] Published in summary form only