News tagged with amplitude
Amplitude
Amplitude is the magnitude of change in the oscillating variable with each oscillation within an oscillating system. For example, sound waves in air are oscillations in atmospheric pressure and their amplitudes are proportional to the change in pressure during one oscillation. If a variable undergoes regular oscillations, and a graph of the system is drawn with the oscillating variable as the vertical axis and time as the horizontal axis, the amplitude is visually represented by the vertical distance between the extrema of the curve and the equilibrium value.
In older texts the phase is sometimes very confusingly called the amplitude.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
EP studies helpful in lumbar spinal stenosis prognosis
(HealthDay)—Electrophysiological abnormalities have been identified that are of some prognostic value in determining deteriorating clinical status over the long term for patients with mild-to-moderate lumbar ...
Diseases, Conditions, Syndromes
Dec 28, 2012 |
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Remixed brain waves reveal soundtrack of the human brain
Scientists have combined and translated two kinds of brain wave recordings into music, transforming one recording (EEG) to create the pitch and duration of a note, and the other (fMRI) to control the intensity of the music. ...
Neuroscience
Nov 14, 2012 |
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Alpha wave blocks your mind for distraction, but not continuously
Alpha waves were long ignored, but gained interest of brain researchers recently. Electrical activity of groups of brain cells results in brain waves with different amplitudes. The so called alpha wave, a slow brain wave ...
Neuroscience
Oct 09, 2012 |
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Safe, simple eye test may help save lives by preventing stroke
A simple eye test may someday offer an effective way to identify patients who are at high risk for stroke, say researchers at the University of Zurich. They showed that a test called ocular pulse amplitude (OPA) can reliably ...
Ophthalmology
Jun 07, 2012 |
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A novel method for simultaneously measuring blood pressure and arterial stiffness
Arterial stiffness due to is a major contributor to cardiovascular disease but is very difficult to measure. It also can influence blood pressure readings since these rely on the time taken for arteries to return to normal ...
Medical research
Feb 10, 2012 |
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