field gradients
Force detected nuclear magnetic resonance independent of field gradients
... This thesis describes a new method of magnetic resonance detection based on mechanical displacements caused by magnetic forces, which is general with respect to sample and pulse sequence. A spin-bearing sample placed ...
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NMR Chromatography: Molecular Diffusion in the Presence of Pulsed Field Gradients in Analytical Chemistry Applications
... Figure 1. General description of the diffusion coefficient measurement in NMR. The Hahn spin echo sequence is shown at the top. After the first 90˚ pulse all the spins are aligned in the same direction (same phase) when ...
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A gyrokinetic analysis of electron plasma waves at resonance in magnetic field gradients
... obliquely propagating waves can be unstable. However, since these authors assumed a cold background plasma they did not include the important effects of cyclotron damping by the background plasma or equivalently, mode ...
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Measurement of magnetic field gradients by the hall effect
... magnetic field gradient measuring device, which uses the Hall effect in germanium, has been ...The field sensitive element is a bar of germanium 1 mm by 1 mm by 12 mm with two sets of Hall leads attached 2 ...
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Influence of Magnetic Field Gradients on the Pearlitic Transformation in Steels
... 3.1 Effect of magnetic field gradients on hardness Initially, specimens of all kinds were subjected to pearlitic transformation with the heat pattern shown in Fig. 1 with and without the field gradient of 50 T/m. It ...
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Magnetic resonance imaging of metal artifact reduction sequences in the assessment of metal-on-metal hip prostheses
... magnetic field M of water is reduced compared with the external magnetic field ...magnetic field within the material is strengthened (a feature of paramagnetic ...magnetic field between the ...
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Can ultrasound be used to stimulate nerve tissue?
... electric field gradients are comparable to typical TMS gradients, because the ultrasonically-induced fields pass from maximum to minimum in a much shorter distance, ...
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Continuous Wave NMR Imaging in the Solid State
... relaxation times of less than 30 μs are typical. This difference stems predominately from intranuclear line broadening mechanisms, which are averaged to zero in liquids by rapid random isotropic motion, but which are not ...
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Micro magnetic resonance imaging study of live quail embryos during embryonic development
... from that of the control group. Their distributions were very similar with a P value of nearly 1.0 and a KS distance (D) of only 0.031 (Supplementary Data Figure S1), which indicates that their profiles were almost ...
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Derivation of force constants based on the electric field gradient
... electric field gra- dients ...electric field gradients, and the second order force constant and its har- monic oscillator frequency have been derived from elec- tric field ...
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Reflectance anisotropy spectroscopy of magnetite (110) surfaces
... the optical transitions, associated with anisotropic strain or electric field gradients caused by the (110) surface termination or an native oxide layer, are responsible for the strong signal observed. The ...
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Extended T2-IVIM model for correction of TE dependence of pseudo-diffusion volume fraction in clinical diffusion-weighted magnetic resonance imaging.
... magnetic field gradients of varying strengths (b-values), has shown utility in oncology for disease localisation, diagnosis, stag- ing and assessing therapy response (Yamada et al 1999, Taouli et al 2009, ...
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Evaluation of diffusion models in breast cancer.
... usion” field gradients, such as imaging or susceptibility-related intrinsic gradients, signal attenuation depends on the square of the sum of gradients ...
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Near-field analysis of terahertz pulse generation from photo-excited charge density gradients
... pulse field radiated from photo-excited Fe:InGaAs surfaces suggest that the photo-excited charge carrier dynamics in the plane of the surface play a key role in the process of THz pulse generation, particularly ...
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Gradients of curves
... The gradient of a straight line tells us a great deal about the line. It shows us whether the line is rising or falling and how steep it is. When you walk up a hill, it is very rare to find that the slope of the hill is ...
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Magnetohydrodynamic waves in braided magnetic fields
... spatial gradients in the Alfvén speed, gas and magnetic pressures, density and ...complex field simulations exhibit an increase in the mean ...complex field sim- ulations (s2–s5 and t5) are typically ...
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Charge density analysis for crystal engineering
... rameters, respectively, F and F * are calculated and ex- perimental structure factors and σ 2 is the uncertainty of each structure factor. This leads to an “experimental wavefunction” from which physical properties can ...
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EUV and X ray spectroscopy of the active sun
... Figure 1.14 gives an overview of the processes involved in the standard model for solar flares. During the impulsive (or rise) phase of a flare, energy is deposited into the loop (marked a on Figure 1.14). It is ...
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Morphogens, their identification and regulation
... If morphogens are transported by restricted diffusion, another numerical analysis also predicts the significance of morphogen receptors in establishing robust gradients. It has been proposed that morphogens are ...
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Faceted and dendritic morphology change in alloy solidi cation
... The modelling of facets in phase field is done via a specification of the surface energy, the mobility, or both. We focus on surface energy anisotropy modelling. The link between the surface energy anisotropy and ...
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