Noise-induced firing is studied in two major classes of bursting neuron models in the absence of periodic input. In the biologically relevant subthreshold regime where no deterministic firing occurs, additive noise induces spiking limit cycles. This noise makes the output firing patterns sensitive to the characteristics of autonomous subthreshold oscillations, which can change in response to va...

In this paper we consider the solutions of linear systems of saddle point problems‎. ‎By using the spectrum of a quadratic matrix polynomial‎, ‎we study the eigenvalues of the iterative matrix of the Hermitian and skew Hermitian splitting method‎.

Background A full understanding of the geometry of the nonplanar saddle-shaped mitral annulus can provide valuable information regarding the pathophysiology of mitral regurgitation (MR). Aim of the work To investigate mitral annular geometric deformities using three-dimensional echocardiography among patients with ischemic coronary illness with and without mitral regurgitation. Methods Thre...

We study a model for frustrated tunneling ionization using ultrashort laser pulses. The is based on the strong field approximation and it employs saddle point to predict quasiclassical trajectories that are captured Rydberg states. present classification of saddle-point solutions explore their behavior as functions angular momentum final state, well carrier--envelope phase (CEP) pulse. compare ...

Abstract Eddy current damper (ECD) is a promising device for dissipating kinetic energy in dynamic systems, this study conducted to analyze the characterization and structural optimization of linear ECD under guns launch load. The recoil resistance load highly nonlinear at high velocity, curve shows an increase-decrease-increasing shape like “saddle”, which not conducive stability during operat...

The features of spin-wave transport in a system coupled magnetic microwaveguides with perpendicular magnetization relative to the longitudinal axis are considered. In this case, has uniaxial anisotropy, horizontal and vertical coupling coefficients have different signs, isofrequency surfaces "saddle" shape. propagation transversely limited beams spin waves, type curvature wave...

in this paper we consider the solutions of linear systems of saddle point problems‎. ‎by using the spectrum of a quadratic matrix polynomial‎, ‎we study the eigenvalues of the iterative matrix of the hermitian and skew hermitian splitting method‎.