The TESLA linear collider needs damping rings to achieve the required small transverse emittances for optimum luminosity. Due to the TESLA pulse structure the damping rings are about 17 km long. The resulting unusual ratio of circumference to energy leads to a large space charge tune shift. The originally proposed damping ring [1] has thus been redesigned for higher energy. This paper describes...

A transient perturbation applied to a limb held in a given posture can induce oscillations. To restore the initial posture, the neuromuscular system must provide damping, which is the dissipation of the mechanical energy imparted by such a perturbation. Despite their importance, damping properties of the neuromuscular system have been poorly characterized. Accordingly, this paper describes the ...

We prove an analogue of the Caffarelli–Kohn–Nirenberg theorem for weak solutions of a system of PDEs that model a viscoelastic fluid in the presence of an energy damping mechanism. The system was recently introduced as a possible method of establishing the global-in-time existence of weak solutions of the well-known Oldroyd system.

Abstract We present a generic mechanism for the thermal damping of compressive waves in interstellar medium (ISM), occurring due to radiative cooling. solve dispersion relation magnetosonic two-fluid (ion-neutral) system which density- and temperature-dependent heating cooling mechanisms are present. use this relation, addition an analytic approximation nonlinear turbulent cascade, model dissip...

A time-frequency identification technique based on wavelet transform is formulated and applied to free-decay responses of linear systems with non-proportional viscous damping. The Cauchy mother wavelet is used. Frequencies, modal damping ratios and complex mode shapes are identified from output-only free vibration signals. This identification technique has also shown to be effective when the (n...

this paper presents a nonlinear model of a clamped-clamped microbeam actuated by an electrostatic load with stretching and thermoelastic effects. the frequency of free vibration is calculated by discretization based on the differential quadrature (dq) method. by separating the real and imaginary parts of frequency, the quality factor of thermoelastic damping is calculated. both the stretching a...

This paper discusses the damping measurements on cables with real-time controlled MR dampers that were performed on a laboratory scale single strand cable and on cables of the Sutong Bridge, China. The control approach aims at producing amplitude and frequency independent cable damping which is confirmed by the tests. The experimentally obtained cable damping in comparison to the theoretical va...

The linear electron acoustic waves propagating in plasmas with two kappa-distributed electrons and stationary ions are investigated. temperatures of the assumed to be same, but kappa indices not. It shows that if one index is small enough other large enough, a weak damping regime exists. dispersions rates numerically studied. parameter spaces for weakly damped analyzed. Moreover, present model ...

additional dampers are employed in order to decrease the dynamic response of structure against the earthquake and wind loading recently. in this study, two types of systems related to waste of inactive energy, i.e. frictional damper which is categorized in dampers dependent on movement and viscoelastic damper which is categorized in dampers dependent on velocity, in making steel structures resi...