sine wave

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sine wave

Sinusoidal waveform A waveform of periodic oscillations–eg, in alternating current in which the amplitude of each point in the wave is proportional to the sine of the time from a start point Cardiology An EKG finding described in severe hyperkalemia where the 'P' wave disappears and the QRS complex and 'T' wave merge in an oscillating pattern

sine wave

(sīn wāv)
A symmetric wave representing one complete cycle of a single-frequency oscillation; the displacement of mass over time described by using a function from trigonometry, the sine.
See also: pure tone

sine wave

continuous, oscillating stream of energy, generated by an electrosurgery unit; used during surgery to section/separate soft tissues (see Table 1)
Table 1: Forms of electrosurgery
Electrosurgery typeFeatures
ElectrofulgurationUses a high-voltage, dampened waveform to produce a spark that arcs from the probe tip to the skin lesion, causing superficial charring of the lesion surface
ElectrosectionUses an undampened or mildly damped current in conjunction with a very fine emitting electron to produce a cutting effect through soft tissue
ElectrocoagulationUses an intermittent damped current in conjunction with a larger emitting electrode to produce less intense heat over a larger area to induce coagulation and thereby haemostasis
ElectrodesiccationUses an intermittent damped waveform with high voltage and a lower current emitted from a ball electrode to induce cell dehydration and tissue shrinkage
References in periodicals archive ?
If a two-quadrant sine curve is an appropriate model, then these sine curves would have similar length (in minutes).
However, in this case the period from the transition point may not be a sine curve so exponential and square-root decay functions were considered.
These results indicated that these supply operations maintained high states of readiness throughout the IDTC and avoided the readiness sine curve trough.
Neither of these results is unexpected, since we are dealing with sine curves (roughly speaking), which take much longer to turn the corner than pass through the midpoint.
Abstract: Traditionally fitting a sine curve with three sample points is taken as a combined optimal problem in which three variables are involved.
When utilized with Equipe's traditional sine curve motion control profiling, the new software enabled a standard Equipe ATM robot to transfer 25 200mm wafers between cassettes in under 57 seconds.
Sine curves and three-axis movement get very complicated.