Construct · 3 fields · 3 citations

Where does ripple collide?

One name. Different field. Different construct. One map.

● jingle · one word, three constructs Nearest construct by meaning·not indexed
ripple3 CONSTRUCTSCapillary rippleLAMB · CAPILLARY WAVESharp-wave rippleBUZSÁKI · 1992Ripple voltageSEDRA & SMITH · RECTIFIER

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1932Capillary ripple1992Sharp-wave ripple2014Ripple voltage
2026

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Fluid dynamics

Tiny surface waves ruled by surface tension

In fluid dynamics, a ripple is a short-wavelength surface wave whose restoring force is dominated by surface tension rather than gravity, the small wrinkles seen when wind first catches still water or a drop disturbs a pool. Lamb's Hydrodynamics gives the dispersion relation in which, below a few centimetres of wavelength, surface tension sets the wave speed and the shortest waves travel fastest. The referent is a capillary surface wave characterised by wavelength and the tension-driven dispersion, and it is a different construct from residual ripple on a power supply or a burst of brain activity, sharing only the picture of small rhythmic undulations.[1]

Unit
Wavelength and phase speed of the surface wave (surface-tension regime)
Recovery means
Not applicable
Measured by
Characterised by the capillary-wave dispersion relation linking wavelength, frequency, and surface tension

Neuroscience

A fast hippocampal oscillation during rest

In neuroscience, a ripple is a brief, fast (roughly 150–250 Hz) oscillation in the hippocampus, riding on sharp waves during rest and sleep, during which neurons replay recent activity in compressed sequences thought to support memory consolidation. Buzsáki, Horváth, Urioste, Hetke, and Wise's 1992 High-frequency network oscillation in the hippocampus first characterised these high-frequency network events. The referent is a transient fast brain oscillation defined by its frequency band and timing, and it has nothing to do with capillary waves or supply-rail ripple beyond the shared image of a quick wave.[2]

Unit
The frequency band (~150–250 Hz) and duration of the oscillatory event
Recovery means
Not applicable
Measured by
Detected in the local field potential by band-pass filtering and event detection of high-frequency bursts on sharp waves

Power electronics

Leftover AC wobble on a DC supply

In power electronics, ripple is the small residual alternating variation left on the output of a rectifier and filter that is supposed to deliver steady direct current, the leftover of the AC input that the smoothing capacitor could not fully remove. Sedra and Smith's Microelectronic Circuits relates the ripple amplitude to the load current, capacitor size, and line frequency. The referent is an unwanted periodic fluctuation on a DC rail, measured as ripple voltage, and it is unrelated to a water ripple or a hippocampal oscillation, joined to them only by the shared word for a small wave.[3]

Unit
The peak-to-peak ripple voltage on the DC output
Recovery means
Not applicable
Measured by
Measured as peak-to-peak or RMS ripple voltage, or as a ripple factor relative to the DC level

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Nearby collisions

wave3 fields · 4 citationsjingle · one word, three constructsamplitude4 fields · 4 citationsjingle · one word, four constructsband2 fields · 2 citationsjingle · one word, two constructs

References

  1. Lamb, H. (1993). Hydrodynamics (6th ed.). Cambridge University Press. (Original work published 1932) ISBN 9780521458689
  2. Buzsáki, G., Horváth, Z., Urioste, R., Hetke, J., & Wise, K. (1992). High-frequency network oscillation in the hippocampus. Science, 256(5059), 1025–1027. https://doi.org/10.1126/science.1589772
  3. Sedra, A. S., & Smith, K. C. (2014). Microelectronic circuits (7th ed.). Oxford University Press. ISBN 9780199339136

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