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Showing 1 to 14 of 14 for “"alternating field"”.
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The Loss in Solid Poles of Synchronous Machines On Load
… waves and of the effect of the superposed main field, which is stationary relative to the poles. The major part of the work is concerned with the effect of a superposed parallel steady field on the permeability and losses for an alternating field in mild steel. Experiments show that, for a given …
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Modeling and control of a self-assembled robotic swimmer
… and a non-magnetic bead are exposed to an alternating magnetic field that is oriented per- pendicular to the liquid surface [1]. It can be steered by modulating the frequency of the alternating field. We model the swimmer as a unicycle and learn a mapping from frequency to forward speed and …
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Dynamic Electroporation Modelling
… and simulation of the effects of electric fields on a single spherical cell are undertaken. Of interest is the effect that different electric field waveforms have on the induced transmembrane potential of the cell and by consequence the electropermeabilization of the cell membrane in terms …
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Microfabricated magnetophoretic focusing systems for the separation of submicrometer particles
Magnetic separation is an actively researched field due to its broad applicability to the mineral, chemical, and biological industries. The objective of this work was to design, fabricate, and test systems to study magnetophoresis of particles in suspension. To achieve this goal, two system …
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An ultra-high resolution pulsed-wire magnet measurement system
… depends in part on the quality of the magnetic field in the undulator. Ideally the magnetic field on the axis of the undulator is transverse to the axis and sinusoidally varying due to the periodic sequence of alternating field dipole magnets. The resulting ideal trajectory of a relativistic …
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Spin dynamics of fine magnetic particles
… to show the complex motion of the moments in an alternating field and it was found that positive and negative cycles of the field produced an asymmetry in the motion. This asymmetry leads to one of the easy magnetisation directions being favoured so that when the field is cycled to zero a …
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Decline of the lunar dynamo
… determining the lifetime of the magnetic field informs about the nature of the dynamo generation mechanism, which in turn may provide constraints for the body's thermal (for convection-based dynamos) and dynamical history (for precession-based dynamos). Several recent paleomagnetic studies …
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Electrofusion of Escherichia coli with Giant Lipid Vesicles and the Compaction of Escherichia coli Nucleoid
… and hybrid synthetic lipid vesicles. Electric field-mediated fusion (electrofusion) is one of the most popular fusion methods owing to the simple implementation and quick inducibility of the fusion. In electrofusion, an alternating electric field is applied on cells/vesicles and chain-like …
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Development of Gold-Magnetite Hybrid Nanoparticles for Advanced Radiotherapy
… were determined by dynamic light scattering and alternating field magnetometer. The potentialities of H-NPs for MR imaging were studied using a human 4T-MRI scanner. Nanoparticles were proven to induce concentration-dependent contrast enhancement in T2*-weighted MR-images. The biosafety, the …
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Paleomagnetic and mineral magnetic studies of zinc-lead ore deposits in the Metaline (Washington state, USA) and Midlands (Ireland) ore fields
Keywords: Ore deposits, Ireland, Ore fields, Zinc-lead ore, Metaline ore field, Midlands ore field . Carbonate-hosted Zn-Pb deposits of the Metaline (USA) and Irish Midlands (Ireland) ore fields exhibit features of both MVT and SEDER deposits, and therefore, play an important role in the debate …
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A magnetic resonance study of the screening of electric fields in metals
We have observed zero field resonance in zinc-doped aluminum samples by means of the Ramsey-Pound magnetic field cycling technique. Experiments were performed near 1.2o K in order to obtain Tl sufficiently long to perform a cycle in a time less than Tl , Near 53.5 kc/sec and 27 kc/sec we see pure …
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Tiny Space Magnets: X-ray Microscopy and Nanopaleomagnetism of Meteoritic Metal
… presence or absence of a dynamo-driven magnetic field. These observations provide essential constraints on the degree of differentiation, core solidification timescales and the driving forces for convection. This thesis focusses on the paleomagnetic information recorded by iron and stony-iron …
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Induction Motors With Rotor Helical Motion
… static end effect, which manifests itself by the alternating field component, is represented by additional circuit branch similar to the ones of motor with alternating magnetic field. Each type of the end effects is modeled and included separately. The results regarding determination of basic …
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Direction and intensity of Earth's magnetic field at the Permo-Triassic boundary
The Earth's magnetic field is generated by the motion of liquid iron-rich material in the outer core. One of the most drastic manifestations of the dynamics in the outer core are polarity reversals of the magnetic field. The processes controlling geomagnetic reversals, however, are still poorly …