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Related Concept Videos

Sound Waves: Resonance01:14

Sound Waves: Resonance

Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Concept of Resonance and its Characteristics01:19

Concept of Resonance and its Characteristics

If a driven oscillator needs to resonate at a specific frequency, then very light damping is required. An example of light damping includes playing piano strings and many other musical instruments. Conversely, to achieve small-amplitude oscillations as in a car's suspension system, heavy damping is required. Heavy damping reduces the amplitude, but the tradeoff is that the system responds at more frequencies. Speed bumps and gravel roads prove that even a car's suspension system is not immune...
Resonance and Hybrid Structures02:16

Resonance and Hybrid Structures

According to the theory of resonance, if two or more Lewis structures with the same arrangement of atoms can be written for a molecule, ion, or radical, the actual distribution of electrons is an average of that shown by the various Lewis structures.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
Resonance in an AC Circuit01:26

Resonance in an AC Circuit

The property of an inductor makes it resist any change in the current passing through it, while the property of a capacitor is to build up the charge across its terminals. Hence, if an inductor and capacitor are connected in series, they have opposite effects on the relative phase between current and voltage. The current through the circuit undergoes forced oscillation at the frequency of the source. The resistance term in an R-L-C circuit acts as a damping term because power is dissipated...

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Related Experiment Video

Updated: May 29, 2026

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
12:21

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

Published on: April 4, 2016

Geometric stochastic resonance in a double cavity.

Pulak K Ghosh1, Russell Glavey, Fabio Marchesoni

  • 1Advanced Science Institute, RIKEN, Wako-shi, Saitama, 351-0198, Japan.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|August 27, 2011
PubMed
Summary

Geometric stochastic resonance synchronizes particle transport across membranes. Oscillating forces, both perpendicular and parallel, drive particle currents, with repulsion playing a key role in controlling this phenomenon.

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Last Updated: May 29, 2026

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
12:21

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

Published on: April 4, 2016

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

Area of Science:

  • Physics, specifically statistical physics and soft matter physics.
  • Interdisciplinary science bridging physics and nanotechnology/biophysics.

Background:

  • Stochastic resonance is a phenomenon where a non-linear system benefits from a certain level of noise.
  • Particle transport through porous media is crucial in various scientific and industrial applications.
  • Understanding particle dynamics under external forces is key to controlling transport phenomena.

Purpose of the Study:

  • To characterize geometric stochastic resonance as a synchronization process in particle diffusion across membranes.
  • To investigate particle currents driven by oscillating forces perpendicular and parallel to the membrane.
  • To explore the influence of particle repulsion on transport dynamics.

Main Methods:

  • Theoretical modeling of particle diffusion in a confined geometry (membrane pore).
  • Analysis of particle currents under combined perpendicular and parallel oscillating forces.
  • Spectral analysis to identify harmonic-mixing current components.
  • Inclusion of inter-particle repulsion effects in the model.

Main Results:

  • Geometric stochastic resonance was demonstrated to be a synchronization process.
  • Particle currents were driven both perpendicular and parallel to the membrane.
  • Harmonic-mixing spectral current components were generated by the combined drives.
  • Particle repulsion was identified as a significant controlling factor in the transport.

Conclusions:

  • Particle transport across porous membranes under oscillating forces can be effectively controlled via stochastic resonance.
  • The findings have potential applications in manipulating the transport of colloids and biological molecules through nanopores.
  • Synchronization dynamics offer a new perspective on understanding and controlling transport in confined systems.