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By manipulating skin cooling during treatment, RF can also be used for heating and reduction of fat. Currently, the most common uses of RF-based devices are to noninvasively manage and treat skin tightening of lax skin (including sagging jowls, abdomen, thighs, and arms), as well as wrinkle reduction, cellulite improvement, and body contouring. [7]
Allan H. Frey was the first American to publish on the microwave auditory effect (MAE). Frey's "Human auditory system response to modulated electromagnetic energy" appeared in the Journal of Applied Physiology in 1961. [1]
Radiofrequency ablation (RFA), also called fulguration, [1] is a medical procedure in which part of the electrical conduction system of the heart, tumor, sensory nerves or a dysfunctional tissue is ablated using the heat generated from medium frequency alternating current (in the range of 350–500 kHz).
[3] [4] These coils require a great deal of RF power because of their size, so they are often driven in quadrature in order to reduce by two the RF power requirements. The condition to attain a high RF magnetic field homogeneity is to approximate spatial cosine current distribution in radiofrequency coil. [ 5 ]
Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency [1] range from around 20 kHz to around 300 GHz.
Patients (usually children, but including adults) with this disorder usually show: [2] [3] [4] Widespread developmental delay; Speech delay; Balance and walking difficulties (may learn to walk at a later-than-average age or may never be ambulatory) Hypotonia; Feeding difficulties (dysphagia is one of the causes) Epilepsy; Excessive daytime ...
Therefore, older adults have a difficult time switching from task 1 to task 2 that is most profound when either the first or second task is difficult. These differences could be due to the fact that older adults have a reduced ability to bypass the central bottleneck , through task automatization. [ 9 ]
The multipactor effect is a phenomenon in radio-frequency (RF) amplifier vacuum tubes and waveguides, ... This page was last edited on 12 January 2025, at 05:20 (UTC).