The seasonal cycle of mid to high latitude surface air temperature is prime example of a climate response to external forcing. Here we examine what controls the amplitude and phase of this cycle. By comparing the seasonal cycle in an numerical model of the atmosphere and ocean mixed layer where the large seasonal variation in humidity is allowed to affect longwave radiation to one where it is n...

A quantum kinetic equation is derived for the description of pair production in a timedependent homogeneous electric field E(t). As a source term, the Schwinger mechanism for particle creation is incorporated. Possible particle production due to collisions and collisional damping are neglected. The main result is a kinetic equation of non-Markovian character. In the low density approximation, t...

In aero-engine bearing chambers, two-phase shearing flows are difficult to predict as Computational Fluid Dynamics (CFD) RANS models tend overestimate interfacial turbulence levels, leading inaccuracies in the modelling of flow. Turbulence damping methods have been developed address this problem, such Egorov’s correction, however, method is mesh dependent and results differ considerably accordi...

iii Abstract The goal of this research is to provide a framework for vibro-acoustical analysis and design of a multiple-layer constrained damping structure. The existing research on damping and viscoelastic damping mechanism is limited to the following four mainstream approaches: modeling techniques of damping treatments/materials; control through the electrical-mechanical effect using the piez...

The dry lubricated bump-type foil air bearing enables a carrying load capacity due to pressure build up in convergent film. Since the provides low power dissipation above lift-off speed and flexible an adaptivity against high temperatures, manufacturing errors or rotor growth, is particular suitable for rotating machineries. corresponding dynamic behavior depends on operational parameters, of s...