Damping-off disease due to Pythium aphanidermatum is one of the most harmful diseases cucumber. One critical issues in field biological control establishment a link between beneficial bacteria screened laboratory and its industrial application. Therefore, when developing biocontrol agents, it necessary study optimization mass production conditions select suitable carrier for their final formula...

This paper aims at testing and modeling business-cycle asymmetries within a structural time-series framework, allowing for smooth transition in the parameters characterizing the cyclical component, namely, the damping factor and the frequency. An LM test of linearity is derived, and illustrations are provided with reference to a set of quarterly U.S. industrial production series for two-digit m...

A closed form solution for characterizing voltage-based signals in an RLC tree is presented. This closed form solution is used to derive figures of merit to characterize the effects of inductance at a specific node in an RLC tree. The effective damping factor of the signal at a specific node in an RLC tree is shown to be a useful figure of merit. As the effective damping factor of a signal incr...

Abstract This work mainly concentrates on the optimization of cubic and bistable nonlinear energy sink (NES) to find maximum efficiency point under harmonic excitation. The conservative system is considered reveal inner property damping system. With application multiple scales method complex variables method, threshold excitation different response regimes are distinguished assumption 1:1 reson...

Advances in nano-fabrication techniques has made it feasible to observe damping phenomena beyond the linear regime nano-mechanical systems. In this work, we report cubic non-linear palladium resonators. Nano-scale beams exposed a $H_2$ atmosphere become softer and display enhanced Duffing non-linearity as well at ultra low temperatures. The is highest lowest temperatures of $\sim 110\: mK$ decr...

We analyze, both experimentally and numerically, the nonlinear regime of photo-induced coherent magnetization dynamics in cobalt-doped yttrium iron garnet films. Photo-magnetic excitation with femtosecond laser pulses reveals a strongly response spin subsystem significant increase effective Gilbert damping. By varying fluence external magnetic field, we show that this nonlinearity originates an...

In this study, a novel analytical solution to the integrable undamping Duffing equation with constant forced term is obtained. Also, new approximate (semianalytical) for nonintegrable linear damping oscillator reported. The given in terms of Weierstrass elliptic function arbitrary initial conditions. With respect it, semianalytical constructed depending on ansatz and exact standard (in absence ...

– A weakly nonlinear model for two-dimensional Faraday waves over infinite depth is derived and studied. Sideband instability of monochromatic standing waves as well as non-monochromatic solutions are studied analytically. Persistent irregular regimes are found numerically. Introduction. – Driven gravity-capillary waves is a well-known pattern-forming system owing its popularity to a relative s...