Results 201 to 210 of about 67,721 (237)
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Shunt protection for superconducting Maglev Magnets
Cryogenics, 1979Abstract Closely coupled, short-circuited shunt coils are proposed for quench protection of super-conducting Maglev magnets which use high resistance, matrix composite conductors. It is shown that, by suitable design, the shunts can reduce ac losses and that the changing currents during magnet energization or vehicle lift off and landing can be ...
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Dynamic telephone receiver with magnetic shunt
The Journal of the Acoustical Society of America, 1989A dynamic telephone receiver which is capable of being used in association with hearing aids, has a flux coil positioned around the pole piece and magnet assembly. To minimize the strong magnetic leakage field radiated from the air gap, which can attract pins, paper clips and other ferrous metals a shunt can be provided at the face of the receiver ...
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Shunt-coupled magnetic-amplifier circuits
Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics, 1959A recent study of magnetic-amplifier theory based on block-diagram techniques1 suggested to this author that one potentially useful basic technique for extracting the output information from the simple self-saturating magnetic amplifier had been seriously neglected in the past. Although it is a well-recognized fact that the output information in a self-
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Magnetic dynamic hysteresis of a resistively shunted Josephson-junction array
Physical Review B, 1994The magnetization curves of a slablike uniform Josephson-junction array with resistive shunts are calculated from the dc and ac Josephson equations and the gauge-invariant phase difference. The parameters are chosen in accord with actual values for high-Tc superconductors (HTSC's).
, Chen, , Sanchez, , Hernando
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Magnetic resonance angiography of dialysis access shunts: Initial results
Magnetic Resonance Imaging, 1996The objective of this study was the feasibility of imaging hemodialysis fistulae with magnetic resonance angiography (MRA). MRA was performed in eight Brescia-Cimino fistulae and seven goretex loop grafts, five of which were stenosed and 10 normal. We compared two MRA methods: a 2D magnetization prepared turbo field echo (MPTFE) and a 3D phase contrast
G J, Waldman +5 more
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Irreversible magnetization effects in a network of resistively shunted tunnel junctions
Physical Review B, 1991We investigate the magnetic behavior of a two-dimensional network of resistively-shunted (zero-capacitance) Josephson junctions, treating magnetic screening effects in a self-consistent manner. By this, we obtain stationary distributions of magnetic flux and hysteresis effects typical of single crystals or ceramic samples of high-{ital T}{sub {ital c}}
, Majhofer, , Wolf, , Dieterich
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Magnetic resonance imaging of the lentiform nuclei in dogs with portosystemic shunts
Journal of Small Animal Practice, 2015OBJECTIVESTo develop and evaluate a method to quantify the T1‐weighted magnetic resonance imaging signal intensity of the lentiform nuclei in dogs, and to determine if there is any significant difference in this signal intensity between dogs with portosystemic shunts and a control group.MATERIALS AND METHODSA retrospective blinded study was performed ...
V, Mortera-Balsa +5 more
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Effect of Vagus Nerve Stimulator Magnet on Programmable Shunt Settings
Neurosurgery, 2004Vagus nerve stimulators and programmable shunt valves are used in the operative care of epilepsy and hydrocephalus, respectively. Both devices use magnetic fields to activate and program their various settings and functions. The authors conducted several ex vivo trials to better elucidate any interplay between the two systems.A pulse generator ...
Rahul, Jandial +3 more
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An unusual diagnosis of atrial shunt defect by magnetic resonance imaging
International Journal of Cardiology, 2009Paroxysmal atrial arrhythmias especially atrial fibrillation are frequently encountered in adult patients with atrial septal defect. However, the diagnosis of atrial defect can be difficult. Thransthoracic echocardiography, the mostly utilized cardiac technique, has shown a limited ability to identify small atrial defects.
Patanè S +5 more
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Is the Ex-PRESS Glaucoma Shunt Magnetic Resonance Imaging Safe?
Journal of Glaucoma, 2010Ex-PRESS mini glaucoma shunt is a miniature, stainless steel, nonvalved device used for the treatment of glaucoma. The purpose of this study was to evaluate the safety of the Ex-PRESS glaucoma shunt during magnetic resonance (MR) imaging.The effect of a magnetic field on the Ex-PRESS glaucoma shunt was evaluated in 4 scenarios.
Noa, Geffen +5 more
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