The influence of system vacuum, pulsation settings, mouthpiece chamber vacuum, and teat-end vacuum on teat-end congestion were tested in a 2 × 2 factorial design.
A few attempts have been reported in the literature on examining the interaction between bed oscillations, plenum chamber air pulsation and propagating pressure waves in fluidized beds, showing some promises on predicting the local pressure fluctuations.
The developed dynamic pressure generator (DPG) consists of an electrodynamic loudspeaker that generates stable and adjustable sinusoidal pressure pulsations inside the air chamber within the generator housing.
Once the agar was added to fill the chamber, movement artifacts from pulsations were almost completely eliminated.
Injections were made through a small slit in transparent artificial dura, previously placed in the chamber, to minimize brain pulsations.
To observe and compare TI to the standing, 'awake' state, the animal was placed in a chamber and the abdominal pulsations were recorded when gross movements stopped.
The secondary objective was to assess the interactive effects of mouthpiece chamber vacuum with teat-end vacuum and pulsation setting on teat-end congestion.
In order to reduce the amplitude of this pressure pulsation, a pressure pulsation dampener (PPD) applied in the discharge chamber of a twin screw refrigeration compressor was proposed based on the theory of Helmholtz resonator.
The animal was kept upright in a small chamber kept in a Faraday cage, and its abdominal pulsations were video recorded.
Inside the chamber, vessels were visible on the surface of the matrix and the patent pedicles showed pulsation of the artery and sufficient blood flow with a positive balooning test in the vein.
