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Optoelectronic Frequency Stabilization Techniques in Forced Oscillators
2021Forced frequency stabilization techniques of self-injection locking (SIL) and self-phase locked loop (SPLL) have been demonstrated to be effective for phase noise reduction. In SIL scheme, a portion of the oscillator output is directly injected back to the oscillator after passing through a long delay while in SPLL, the delayed signal is used to ...
Li Zhang, Afshin S. Daryoush
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Forced oscillation technique may identify severe asthma
The Journal of Allergy and Clinical Immunology: In Practice, 2019Background: Fixed airflow obstruction in severe asthma is usually assessed by spirometry. However, the role of the forced oscillation technique (FOT) in severe asthma is unknown. We hypothesised that FOT would be useful to diagnose severe asthma and discriminate it from non-severe asthma. Aims: In this cross-sectional study, we assessed the usefulness
Toshihiro, Shirai +7 more
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2014
Forced oscillation technique (FOT) is a noninvasive approach for assessing the mechanical properties of the respiratory system. The technique is based on applying a low-amplitude pressure oscillation to the airway opening and computing respiratory impedance defined as the complex ratio of oscillatory pressure and flow. Impedance data are interpreted in
Daniel Navajas +2 more
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Forced oscillation technique (FOT) is a noninvasive approach for assessing the mechanical properties of the respiratory system. The technique is based on applying a low-amplitude pressure oscillation to the airway opening and computing respiratory impedance defined as the complex ratio of oscillatory pressure and flow. Impedance data are interpreted in
Daniel Navajas +2 more
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Forced oscillation technique: comparison of two devices
Journal of Applied Physiology, 1985The respiratory impedances in healthy subjects and patients with advanced obstructive lung disease were measured between 2 and 32 Hz, using two forced oscillation techniques: the setup used previously by Grimby et al. (J. Clin. Invest. 47: 1455–1465, 1968) and a modified device in which the pneumotachograph is replaced by a 2-m-long tube and the ratio
H, Franken +4 more
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Paediatric Respiratory Reviews, 2006
FOT may hold the promise of improving the diagnosis of airway obstruction, but may be even better in quantifying the magnitude of airway reversibility and hyper-reactivity, helping in the adjustment of therapy, and monitoring disease progression in young children.
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FOT may hold the promise of improving the diagnosis of airway obstruction, but may be even better in quantifying the magnitude of airway reversibility and hyper-reactivity, helping in the adjustment of therapy, and monitoring disease progression in young children.
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The Forced Oscillation Technique in Paediatric Respiratory Practice
Paediatric Respiratory Reviews, 2016The Forced Oscillation Technique (FOT) is a lung function modality based on the application of an external oscillatory signal in order to determine the mechanical response of the respiratory system. The method is in principal noninvasive and requires minimal patient cooperation, which makes it suitable for use in young paediatric patients.
Eleni, Skylogianni +3 more
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Two-point calibration procedure of the forced oscillation technique
Medical and Biological Engineering and Computing, 1997The forced oscillation technique is usually calibrated by loading the measuring device with a known impedance. A correction function is calculated, relating the measured and reference impedances at each frequency. However, this one point calibration procedure does not account for transducer asymmetry.
K N, Desager +2 more
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A Fan-Based, Low-Frequent, Forced Oscillation Technique Apparatus
IEEE Transactions on Instrumentation and Measurement, 2014The forced oscillation technique (FOT) is a noninvasive method to characterize the respiratory impedance (Z). Z is defined as the frequency-dependent ratio between pressure and flow. The FOT determines Z by superimposing small amplitude (in the order of 0.1 kPa) pressure oscillations on the normal breathing.
Maes, Hannes +3 more
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The forced oscillation technique in children with respiratory disease
Pediatric Pulmonology, 1985AbstractThe single‐frequency forced oscillation technique was used to estimate the total respiratory impedance, resistance, and reactance at 2, 4, and 12 Hz of children who had cricoid stenosis (CS; n = 11), provoked bronchoconstriction (PB; n = 6), or cystic fibrosis (CF; n = 13).
L, Solymar, P H, Aronsson, R, Sixt
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Measurements of dynamic stability derivatives using direct forced oscillation technique
ICIASF 2001 Record, 19th International Congress on Instrumentation in Aerospace Simulation Facilities (Cat. No.01CH37215), 2002The subject of the experimental investigation presented in this paper is to measure the dynamic stability derivatives of a generic combat aircraft model in the Ankara Wind Tunnel by using the direct forced oscillation technique. The model, used for the tests is the AGARD, Standard Dynamic Model (SDM).
ALEMDAROGLU N. +4 more
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