Results 161 to 170 of about 155,608 (212)

Magneto-acoustic phonon antiresonances in Wannier–Stark superlattices

Solid-State Electronics, 1998
We have measured the hopping current of electrons magnetically confined in a 1D superlattice. We find that phonon assisted hopping between Wannier–Stark states vanishes at hopping energies where the momentum of an LA phonon mode satisfies the condition of Bragg reflection in the superlattice. This effect proves that, even in the presence of an external
Nogaret A, Eaves L, Main PC, Henini M, Maude DK, Portal JC, MOLINARI, Elisa, Beaumont SP   +7 more
openaire   +2 more sources

Bioelectric current image reconstruction from magneto-acoustic measurements

IEEE Transactions on Medical Imaging, 1988
An investigation is conducted of the possibility of reconstructing images of current dipoles in a volume conductor from data obtained by the magnetoacoustic technique. A modified form of the algebraic reconstruction technique (ART) is used. Reconstruction results of simulated data show that it is possible to find the location, relative magnitude, and ...
M R, Islam, B C, Towe
openaire   +2 more sources

Utilizing Global Time-Delay Estimation for Axial and Lateral Displacement Computation in Magnetomotive Ultrasound

Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Magnetic nanoparticles (MNPs) are versatile tools in biomedical applications, serving as contrast agents in magnetic resonance imaging, mediators for localized tumor heating in magnetic hyperthermia, and carriers in magnetic drug targeting (MDT ...
C. Huber, Christian Heim, Stefan J. Rupitsch, Helmut Ermert, Ingrid Ullmann, S. Lyer   +5 more
semanticscholar   +1 more source

M-sequence-coded excitation for magneto-acoustic imaging

Medical & Biological Engineering & Computing, 2018
Magneto-acoustic imaging is a novel functional imaging method to electrical characteristics of tissue. It provides valuable tools for diagnosing early stage tumor and monitoring bioelectrical current. Common single short-pulse excitation limits SNR due to the short-pulse duration and low power of magneto-acoustic signal.
Shunqi Zhang, Ren Ma, Tao Yin, Zhipeng Liu   +3 more
openaire   +2 more sources

Review on Biomedical Techniques for Imaging Electrical Impedance

IRBM, 2018
Electrical impedance of a medium helps to predict the behavior of electrical currents in a medium. Electrical impedance refers indeed to the “difficulty”, for an electrical current, to spread through the medium.
Pol Grasland-Mongrain, C. Lafon
semanticscholar   +1 more source

Magneto-Acoustic Properties of UCuGe Single Crystal

Journal of Low Temperature Physics, 2009
We report on results of sound velocity and sound-attenuation measurements performed on the antiferromagnetic (TN=48 K) UCuGe. The measurements have been done on a UCuGe single crystal at different frequencies for longitudinal ultrasound waves propagating along the [001] direction in static (up to 18 T) and pulsed (up to 60 T) magnetic fields applied ...
Yasin, S., Andreev, A. V., Sytcheva, A., Zherlitsyn, S., Wosnitza, J.   +4 more
openaire   +2 more sources

Development of a Comprehensive Equivalent Circuit Model for High-Power Giant Magnetostrictive Electroacoustic Transducers Considering the Effect of Hysteresis

IEEE/OES China Ocean Acoustics
Giant magnetostrictive transducers with superior performance, such as having high energy density and large output force, are the core key devices for underwater acoustic detection.
Hushen Li, Bing Gao, Chaoyi Peng, Wenhu Yang, Zewei Wu, Xinzhe Zhao   +5 more
semanticscholar   +1 more source

Contactless Position Measurement of an Electrical Conductor using GMR Sensors

Sensors Applications Symposium
This article introduces a new method for contact-less position measurement of an electrical conductor (such as a current-carrying wire) using giant magneto-resistive (GMR) sensors.
Deepak Ghavari, V. Kartik
semanticscholar   +1 more source

Inward and outward interaction of magneto-acoustic cylindrical and spherical solitary rings in spin-1/2 fermionic quantum plasma

Indian Journal of Physics, 2022
U. N. Ghosh
semanticscholar   +1 more source

Magneto-acoustic oscillations in a toroidal plasma

Plasma Physics, 1978
Toroidal effects on forced axisymmetric magneto-acoustic oscillations in a conventional Tokamak plasma are investigated to first order in the inverse aspect ratio, using dissipative magnetohydrodynamic theory. It is shown that toroidal effects give rise to poloidally asymmetric components but magneto-acoustic resonance is still obtained and it is ...
openaire   +1 more source