Results 241 to 250 of about 6,980,177 (302)
The consequences of the extremely low frequency electromagnetic field (ELF-EMF) exposure on physiological processes in the uterus: novel insights and implications. [PDF]
Front PhysiolKhodadadi M, Zmijewska A, Franczak A.
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Extremely Low Frequency Radiation Enhances Soybean Chlorophyll Index and Nutrient Use Efficiency Under Suboptimal Conditions. [PDF]
Plants (Basel)Miotti F +5 more
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<i>DeepPhysioRecon</i>: Tracing peripheral physiology in low frequency fMRI dynamics. [PDF]
Imaging Neurosci (Camb)Bayrak RG +7 more
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Magnetic Resonance in Medicine, 1989
AbstractIn magnetic resonance imaging, if the object of interest is known to be spatially bounded within the image field‐of‐view. then the high‐intensity, low spatial frequencies can be determined by postprocessing. This allows the system receiver gain to be increased, thereby decreasing the quantization noise from the analog‐to‐digital converters.
J, Jackson, A, Macovski, D, Nishimura
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AbstractIn magnetic resonance imaging, if the object of interest is known to be spatially bounded within the image field‐of‐view. then the high‐intensity, low spatial frequencies can be determined by postprocessing. This allows the system receiver gain to be increased, thereby decreasing the quantization noise from the analog‐to‐digital converters.
J, Jackson, A, Macovski, D, Nishimura
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Low-Frequency Electromagnetic Scattering
SIAM Journal on Mathematical Analysis, 2000The authors study the scattering problem for the time harmonic Maxwell system. The problem is formulated in variational form on a bounded domain by the use of a nonlocal boundary condition. The main part of this paper is concerned with the expansion of the solution into a power series with respect to the frequency.
Ammari, H., Nédélec, J.-C.
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Low frequency photoelastic modulator
Applied Optics, 1984In this paper, we propose a new excitation mode of a photoelastic modulator previously shown to perform low frequency polarization modulation. Photoacoustic and photothermal polarization spectroscopy is possible with this modulation scheme which has the specific advantages of large light throughput and freedom from mechanical vibrations.
J C, Canit, C, Pichon
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LOW-FREQUENCY HEATING REVISITED
Nuclear Fusion, 1981By making use of a general formulation of the MHD energy theorem the power deposited by ideal-MHD waves in a stable plasma is calculated in a straightforward way. When applied to very-low-frequency waves with is the wave vector and the Alfven velocity vector), the principle shows that heating at the shear Alfven wave resonance is inefficient.
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Low-frequency masking patterns
The Journal of the Acoustical Society of America, 1977Tones below 500 Hz show masking effects that are different from those of higher-frequency tones. Where middle- and high-frequency tones have their maximum effect at the masking frequency, and most of the rest of their effect at frequencies higher than themselves, low-frequency tones are consistently most effective in the 400- to 600-Hz range.
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