Results 151 to 160 of about 191,488 (182)
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Research of Core Characteristics of Search Coil Magnetometer
Advanced Materials Research, 2012In this paper, the theory of apparent permeability and effective permeability of the core is described. The apparent permeability with coil in different positions of the core is investigated and simulated by HFSS. The best location of the coil is determined according to the curves of the apparent permeability.
Qun Yu, Hou Bo Zhang, Guan Nan Lin
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Search-coil head-thrust and caloric tests in Ménière's disease
Acta Oto-Laryngologica, 2005Our findings suggest that canal function is substantially preserved in subjects with active vertigo attacks as a result of Ménière's disease (MD). In these subjects, the head-thrust test (HTT) may not be as sensitive to canal dysfunction as traditional caloric testing.
Hong Ju, Park +4 more
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Improving the homogeneity of the magnetic field in the magnetic search coil technique
IEEE Transactions on Biomedical Engineering, 2001The magnetic search coil technique is used to obtain accurate eye-movement measurements. For the data analysis it must be assumed that the magnetic field does not change over time (apart from the required modulation). To comply with this assumption either no translational movements of the eye coil(s) are allowed or the magnetic field has to be ...
Jochen Ditterich, Thomas Eggert
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Reconsideration of Bell's phenomenon using a magnetic search coil method
Documenta Ophthalmologica, 1992The exact direction, amplitude and time course of Bell's phenomenon is still controversial. We evaluated the eye movements associated with spontaneous blinks, voluntary blinks and prolonged eyelid closure using a magnetic search coil method. Spontaneous blinks were accompanied by transient downward and nasalward eye movements, and similar movement ...
M, Takagi, H, Abe, S, Hasegawa, T, Usui
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Nystagmus of Pelizaeus-Merzbacher Disease A Magnetic Search-Coil Study
Archives of Neurology, 1991Magnetic search-coil oculography of three brothers with clinically diagnosed Pelizaeus-Merzbacher disease disclosed the presence of binocular elliptical pendular nystagmus in two patients in whom the waveform of the nystagmus was not obvious on inspection. This study, the first reported application of high-resolution oculography to Pelizaeus-Merzbacher
J D, Trobe +3 more
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Applying wire antenna theory to cored search coils
Radio Science, 1998It seems conceivable that the magnetic field pattern around ferromagnetic objects of high permeability is similar to the electric field pattern around conductive objects, provided that the shapes of the magnetic and electric objects are identical. As a result, we expect the mmf behavior in the gap between two ferromagnetic limbs immersed in a magnetic ...
B. Z. Kaplan, U. Suissa
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A note on search coil errors in the measurement of axial magnetic fields
Journal of Scientific Instruments, 1962An expression is derived for magnetic fields with axial symmetry relating the actual value of the flux density at a point on the axis to the flux density measured by a search coil. It is shown that the error due to the search coil depends upon the even order derivatives of the actual flux distribution, and in some cases may be eliminated by careful ...
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A search-coil method of measuring the a.c. resistivity of the earth
Journal of the Institution of Electrical Engineers, 1936The paper describes a method of measuring the a.c. resistivity of the earth based on the Carson-Pollaczek theory for the mutual impedance of earth-return circuits. The method consists in the measurement of the e.m.f.'s induced in a search coil placed at various distances from an earthreturn circuit carrying alternating current.
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The RPW/Search Coil Magnetometer onboard Solar Orbiter
2019Measuring the fluctuating magnetic fields associated to various phenomena such as waves, shocks, and turbulence is essential for the Solar Orbiter mission. These measurements rely on a tri-axial Search Coil Magnetometer (SCM) built at the Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E) in Orléans, France. Two antennas of SCM
Kretzschmar, Matthieu +10 more
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