SIMULTANEOUS MEASUREMENT OF THE UPPER AND LOWER AIRFLOW RESISTANCE BY OSCILLATION TECHNIQUE

Nasal airflow resistance measurement: forced oscillation technique versus posterior rhinomanometry.

This study was designed to determine whether nasal airflow resistance (Rn) which is nonlinear during tidal breathing, can be assessed by the forced oscillation (FO) technique. Rn values obtained by the FO technique and extrapolated to 0 Hz (Rn,FO) were compared to those assessed by posterior rhinomanometry at maximal tidal inspiratory flow (Rn,m), at a 0.5 L x s(-1) flow (Rn,F), and at a 1 hPa ...

Measurement of total respiratory resistance using oscillation technique.

Clicks, honks, and whoops. D. Pickering (Rad-cliffe Infirmary, Oxford). Three cases are described which were originally diagnosed as having ventricular septal defect, pulmonary stenosis, and innocent prae-cordial honk. These have been reinvestigated using pixie accelerometer, phonocardiographic techniques (Bew et al., 1971). All three have been shown to have clicks which move with posture, Vals...

Automated system for direct measurement and feedback of total respiratory resistance by the forced oscillation technique.

Detection of power oscillation and simultaneous faults using Clark transform

Distance relays are widely used to protect transmission lines. Sometimes, in these lines due to the occurrence of the oscillation of the power, the impedance calculated in the distance relay enters into its functional zones and leads to the cutting off of the lines. This issue can cause global power outages. Accordingly, in this paper, a Clark-based method for detecting the oscillation of power...

Simultaneous measurement of water flow velocity with fluorescent and speckle imaging technique

The average velocity of water flow has been simultaneously measured with fluorescent and speckle imaging methods. The measured velocities with two methods are in good agreement with each other and it confirms that the speckle imaging method can be used as a confident method to measure the velocity of water flow in a dry leaf. Also the velocity of water flow through thick and thin xylems of a le...