Notice of RetractionWave intensity analysis in elastic tubes

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

Wave intensity analysis is a time method for studying waves in elastic tubes. Usually, the forward wave intensity is positive and backward wave intensity is always negative. The reflection coefficient R_WI, which is defined as the magnitude ratio of reflected wave intensity and incident wave intensity, can be used to estimate the blocked extent. In this paper, we set up experiments in which we generated a single semi-sinusoidal wave in long elastic tubes and measured pressure and velocity at the middle sites of the tubes. When the tube is 100% opened, 25% blocked, 50% blocked, 75% blocked and 100% blocked, we obtained five different reflection coefficients R_WI respectively. We concluded that wave intensity analysis provided a convenient, time based technique for estimating the blocked extent by analysing the reflection coefficients R_WI of a tube. This conclusion is helpful for study waves of blood flow in arteries.