An enhancement of vortex-motion damping in thin Pb/In superconducting films is obtained through coupling to an adjacent two-dimensional electron gas formed in a modulation-doped GaAs/AlGaAs heterostructure. This effect is observed by monitoring the power dissipation in the superconductor in the vortex state while increasing the density of the electron gas using a gate voltage. Quantitative agre...

Abstract This paper deals with the reconstruction of the inlet temperature profile of a melted polyethylene (PE) flowing through an extrusion die. The inverse heat transfer problem is formulated as an optimisation problem by considering both the energy and the Navier-Stokes equations. It is solved by using the conjugate gradient algorithm. Experimental results are presented and show the effect ...

We present a simple theoretical framework to describe the thermal noise of a microscopic mechanical beam in a viscous fluid: we use the Sader approach to describe the effect of the surrounding fluid (added mass and viscous drag), and the fluctuation dissipation theorem for each flexural modes of the system to derive a general expression for the power spectrum density of fluctuations. This predi...

A numerical evaluation of the crucial physical properties a 3D unsteady MHD flow along stretching sheet for Casson fluid in presence radiation and viscous dissipation has been carried out. Meanwhile, by applying similarity transformations, nonlinear partial differential equations (PDEs) are transformed into system ordinary (ODEs). Furthermore, solution ODEs, shooting method with Adams Moulton o...

The initial stages of spreading of a suspended cell onto a substrate under the effect of (specific or nonspecific) adhesion exhibit a universal behavior, which is cell-type independent. We show that this behavior is governed only by cell-scale phenomena. This can be understood if the main retarding force that opposes cell adhesion is of mechanical origin, that is, dissipation occurring during t...

According to Stokes' law, a moving solid surface experiences viscous drag that is linearly related to its velocity and the viscosity of the medium. The viscous interactions result in dissipation that is known to scale as the square root of the kinematic viscosity times the density of the gas. We observed that when an oscillating surface is modified with nanostructures, the experimentally measur...