Blood pressure is well established to contain a potential oscillation between 0.1 and 0.4 Hz, which is proposed to reflect resonant feedback in the baroreflex loop. A linear feedback model, comprising delay and lag terms for the vasculature, and a linear proportional derivative controller have been proposed to account for the 0.4-Hz oscillation in blood pressure in rats. However, although this ...

Spontaneous polarization oscillations are observed to develop in two laser beams interacting in an atomic vapour when their polarizations are locked to each other. In a theoretical analysis of the situation, we show tha~ these oscillations are due to groundstate magnetization undergoing Larmor precession. The gain of the feedback loop that locks (he two polarizations acts as a control parameter...

A disk around one component of a binary star system with sufficiently high inclination can undergo Kozai-Lidov (KL) oscillations during which the and eccentricity are exchanged. Previous studies show that without source accretion, KL unstable disks exhibit damped oscillations, due to viscous dissipation, leave stable near or below critical for oscillations. With three-dimensional hydrodynamical...

This paper addresses the problem of a roller-racer rolling on an oscillating plane. Equations motion in form system four nonautonomous differential equations are obtained. Two families particular solutions found which correspond to rectilinear motions along and perpendicular plane's oscillations. Numerical estimates given for multipliers corresponding robot Also, special case is presented it po...

We report on fabrication and characterization of single-longitudinal- and transverse-mode semiconductor ring lasers. A bifurcation from bidirectional stable operation to a regime with alternate oscillations of the counterpropagating modes was observed experimentally and is theoretically explained through a two-mode model. Analytical expressions for the onset and the frequency of the oscillation...

Mechanical properties of metallic-nanowire self-oscillations are investigated through a coherent-state analysis. We focus on elucidating the time behavior quantum energy in such oscillations, addition to analysis fluctuations, evolution eigenstates, and oscillatory trajectories. The varies somewhat randomly at first, but, later time, it undergoes stable periodical oscillation; mean stabilized m...

The envelope oscillations of a cold-fluid corkscrewing elliptic beam in a uniformfocusing magnetic field are studied. In particular, by linearizing the generalized beam envelope equations, the eigenmodes of small-amplitude envelope oscillations are calculated for a cold-fluid corkscrewing elliptic beam oscillating about its equilibrium. All of the eigenmodes are shown to be stable. PACS: 29.27....