There are in the literature several theories to explain the mass loss in stellar winds. In particular, for late-type stars, some authors have proposed a wind model driven by an outwarddirected flux of damped Alfvén waves. The winds of these stars present great amounts of dust particles which, if charged, can give rise to new wave modes or modify the pre-existing ones. In this work, we study how...

The BGP routing protocol uses a mechanism called Route Flap Damping [13] to limit the impact of connectivity instability to any individual sites. Although it is believed that this damping mechanism contributes to the stability of global Internet routing, the exact effects of damping has not been thoroughly examined in a large scale network setting. Previous work [8] has shown that damping can b...

This paper presents an approach for designing a fuzzy logic-based adaptive SVC damping In controller for damping low frequency power oscillations. Power systems are often subject to low Frequency electro-mechanical oscillations resulting from electrical disturbances. Generally, power system stabilizers are designed to provide damping against this kind of oscillations. Another means to achieve d...

The present investigation deals with study of thermoelastic damping and frequency shift of Kirchhoff plate resonators by using generalized thermoelasticity theory of dual-phase-lag model. The basic equations of motion and heat conduction equation are written with the help of Kirchhoff-Love plate theory and dual phase lag model. The analytical expressions for thermoelastic damping and frequency ...

We study the complexity for an open quantum system. Our system is a harmonic oscillator coupled to one-dimensional massless scalar field, which acts as bath. Specifically, we consider reduced density matrix by tracing out bath degrees of freedom both regular and inverted computed purification (COP) using operator-state mapping. found that when COP saturates quickly underdamped overdamped oscill...

This paper will describe how experimental modal testing can be used for designing and determining the effectiveness of add-on damping systems for small structures or substructures. These add-on damping systems, also known as surface damping treatments. have been in use for over 30 years as a means of reducing the response of a structure subjected to vibratory loads. By adding damping to the str...

This paper analyses the damping in pressure compensated closed centre mobile working hydraulic systems. Both rotational and linear loads are covered and the analysis applies to any type of pump controller. Only the outlet orifice in the directional valve will provide damping to a pressure compensated system. Design rules are proposed for how the system should be dimensioned in order to obtain a...

The paper describes an investigation of the effect of structural damping in the torsion mode on wing flutter with the object of finding circumstances in which damping reduces the flutter speed. The drop in flutter speed can be considerable (25 per cent) and extend to very large values of structural damping. The effect is most apparent when the relative density (wing to air) is high, and when th...

biological control of sugar beet damping-off of rhizoctonia solani ag-4 by two native streptomyces isolates (s2 and c) was evaluated in green house and field conditions. in dual culture, two streptomyces isolates inhibited mycelial growth of r. solani ag-4. besides, volatile components of s2 and c inhibited r. solani mycelial growth for 72 and 74 percentages, respectively. soil treatment either...

shear modulus and damping ratio are important input parameters in dynamic analysis. a series of resonant column tests was carried out on pure clays and sand-clay mixtures prepared at different densities to investigate the effects of aggregate content, confining stress, void ratio and clay plasticity on the maximum shear modulus and minimum damping ratio. test results revealed an increase in the...