Results 161 to 170 of about 937 (215)
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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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Forced Oscillations with Nonlinear Restoring Force
Journal of Applied Physics, 1953Forced oscillations with nonlinear restoring force are studied in transient states as well as in steady states. The original differential equation characterized by a nonlinear term is transformed under certain restrictions to the following differential equation of the first order: dy/dx=Y(x,y)/X(x,y).
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SPIE Proceedings, 2012
We study oscillations of a spaser driven by an external optical wave. When the frequency of the external field is shifted from the frequency of an autonomous spaser, the spaser exhibits stochastic oscillations at low field intensity. The plasmon oscillations lock to the frequency of the external field only when the field amplitude exceeds a threshold ...
Alexander A. Lisyansky +4 more
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We study oscillations of a spaser driven by an external optical wave. When the frequency of the external field is shifted from the frequency of an autonomous spaser, the spaser exhibits stochastic oscillations at low field intensity. The plasmon oscillations lock to the frequency of the external field only when the field amplitude exceeds a threshold ...
Alexander A. Lisyansky +4 more
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Quantum coupled oscillators versus forced oscillator
Journal of Optics B: Quantum and Semiclassical Optics, 2001We compare the time evolutions of two quantum systems: a quantum harmonic oscillator driven by a classical force and two coupled quantum harmonic oscillators. We find the conditions under which the first system can be considered as a `mean-field approximation' to the second one.
A S M de Castro, V V Dodonov
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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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External noise synchronizes forced oscillators
Physical Review E, 2001Periodic pulsatile perturbation of nonlinear oscillators generates phase-locking, quasiperiodic, and chaotic responses. This work shows that the application of external noise to ensembles of such forced systems can synchronize oscillations, even in regimes where neither the noise nor the periodic forcing, when applied alone, would lead to such a ...
K, Pakdaman, D, Mestivier
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Forced oscillations of DNA bases
Biophysics, 2016This paper presents the results of the studying of forced angular oscillations of the DNA bases with the help of the mathematical model consisting of two coupled nonlinear differential equations that take into account the effects of dissipation and the influence of an external periodic field. The calculation results are illustrated for sequence of gene
L V, Yakushevich, L A, Krasnobaeva
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Forced oscillation experiments
Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences, 1991Forced oscillation experiments with scale models are carried out to determine hydrodynamic characteristics of ships, with respect to motions in waves or steering and manoeuvring qualities. Depending on the considered motion components, in a horizontal or vertical plane, various methods are used to induce forced oscillations which are discussed briefly.
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Forced oscillations of a self-oscillating surface reaction
Physical Review Letters, 1988Oxydation catalytique de CO sur une face (110) de Pt, sous des conditions permettant une cinetique oscillante stable autoentretenue.
, Eiswirth, , Ertl
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BISTABILITY OF HARMONICALLY FORCED RELAXATION OSCILLATIONS
International Journal of Bifurcation and Chaos, 2002Relaxation oscillations appear in processes which involve transitions between two states characterized by fast and slow time scales. When a relaxation oscillator is coupled to an external periodic force its entrainment by the force results in a response which can include multiple periodicities and bistability.
Phillipson, Paul E., Schuster, Peter
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