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Related Concept Videos

Energy and Power of a Wave00:58

Energy and Power of a Wave

The total energy associated with a wavelength is the sum of the potential energy and the kinetic energy. The average rate of energy transfer associated with a wave is called its power, which is total energy divided by the time it takes to transfer the energy. For a sinusoidal wave, energy and power are proportional to the square of both the amplitude and the angular frequency.
Waves can also be concentrated or spread out, as characterized by the intensity of the wave. Intensity is directly...
Intensity and Pressure of Sound Waves01:05

Intensity and Pressure of Sound Waves

The intensity of sound waves can be related to displacement and pressure amplitudes by using their wave expressions and the definition of intensity. The critical step to achieve this is to write the power delivered by the particles on the wave as the product of force and velocity and simplify the force per unit area as the pressure. The velocity of the medium's particles can be derived from the displacement.
Unlike the time average of a sinusoidal term, which is zero since it is positive and...
Intensity Of Electromagnetic Waves01:22

Intensity Of Electromagnetic Waves

The energy transport per unit area per unit time, or the Poynting vector, gives the energy flux of an electromagnetic wave at any specific time. For a plane electromagnetic wave with E0 and B0 as the peak electric and magnetic fields and traveling along the x-axis, the time-varying energy flux can be given by the following equation:
Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
Velocity and Acceleration of a Wave00:51

Velocity and Acceleration of a Wave

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Standing Waves01:17

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Related Experiment Video

Updated: Jun 28, 2026

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
08:54

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

Published on: February 13, 2018

"Wave" as defined by wave intensity analysis.

Jiun-Jr Wang1, Nigel G Shrive, Kim H Parker

  • 1Department of Cardiac Sciences, Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Canada. jjwang@ucalgary.ca

Medical & Biological Engineering & Computing
|October 22, 2008
PubMed
Summary
This summary is machine-generated.

Wave intensity analysis (WIA) offers an alternative to Fourier analysis for describing arterial waves. This method effectively captures both periodic and non-periodic wave propagation, defining interactions through forward and backward traveling intensity peaks.

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Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
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Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

Published on: July 19, 2016

Related Experiment Videos

Last Updated: Jun 28, 2026

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
08:54

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

Published on: February 13, 2018

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
11:00

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

Published on: July 19, 2016

Area of Science:

  • Biomedical Engineering
  • Fluid Dynamics
  • Cardiovascular Physiology

Background:

  • Arterial wave propagation is typically analyzed using Fourier analysis, focusing on periodic sinusoidal waves related to heart rate.
  • This traditional method has limitations in describing non-periodic wave phenomena in the vasculature.
  • An alternative approach, wave intensity analysis (WIA), based on the method-of-characteristics, offers a more versatile description.

Purpose of the Study:

  • To demonstrate the utility of wave intensity analysis (WIA) in defining and analyzing wave propagation in a simplified vascular model.
  • To illustrate how WIA can describe both periodic and non-periodic wave behaviors.

Main Methods:

  • Employed the method-of-characteristics solution of 1-D conservation laws to develop wave intensity analysis (WIA).
  • Utilized data from a bench-top experiment involving wave propagation in a single elastic tube.
  • Simulated wave reflection and re-reflection between closed and open ends of the tube.

Main Results:

  • Wave intensity analysis (WIA) successfully described wave propagation in the experimental elastic tube.
  • Forward- and backward-travelling peaks of intensity were identified as key indicators of wave interactions.
  • The study confirmed WIA's capability to analyze wave dynamics beyond the limitations of sinusoidal wavetrain descriptions.

Conclusions:

  • Wave intensity analysis (WIA) provides a powerful alternative for understanding wave propagation in arteries, especially for non-periodic events.
  • WIA's ability to define wave interactions via intensity peaks enhances the analysis of complex vascular dynamics.
  • This method broadens the scope of wave analysis in biological systems beyond traditional Fourier-based approaches.