We study electroconvection patterns that appear above the splay Fréedericksz transition in a bent-core nematic liquid crystal with positive dielectric and negative conductivity anisotropy. In contrast to most of the previously observed convection rolls in nematics, they are not shadowgraph patterns at onset. Unusual effects are observed like a transition between longitudinal and normal rolls, c...

The stability of travelling and standing rolls in oscillatory rotating convection is considered from the point of view of equivariant bifurcation theory. To study stability with respect to oblique perturbations the problem is formulated on a rotating rhombic lattice. All primary solution branches with maximal isotropy are determined together with their stability properties using a truncation of...

The Rolls-Royce BR725 is a newly designed jet engine for ultra-longrange and high-speed business jets. In this paper we apply our theory of formal testing [5,6] to the starting system of the Rolls-Royce BR725 control software. To this end we model the system in CSP, evaluate test suites against the formal model, and finally execute test suites in an in-the-loop setting of the SUT. This case stu...

In the present study, non-Newtonian flow in annular pipe is considered. The analytical solution for velocity and temperature fields is presented while entropy generation due to fluid friction and heat transfer is formulated. The third grade fluid with constant properties is accommodated in the analysis. It is found that reducing non-Newtonian parameter increases maximum velocity magnitude and m...

We study the shape of convective rolls in Marine Atmospheric Boundary Layer from Synthetic Aperture Radar images ocean. propose a multiscale analysis with structure functions which allow an easy generalization to analyse high-order statistics and so finely describe rolls. The two main results are 1) second-order function characterizes wavelength direction just like correlation or power spectrum...

The objective of this study was to determine the effect of antimicrobials on the survival and proliferation of Listeria monocytogenes in turkey breast rolls following electron-beam irradiation. Six antimicrobial additive treatments that include no preservatives (control), 0.1% potassium benzoate (PB), 2% sodium lactate (SL), 0.1% potassium benzoate plus 2% sodium lactate (PB + SL), 2% sodium la...

Stable localised roll structures have been observed in many physical problems and model equations, notably in the 1D Swift–Hohenberg equation. Reflection-symmetric localised rolls are often found to lie on two “snaking” solution branches, so that the spatial width of the localised rolls increases when moving along each branch. Recent numerical results by Burke and Knobloch indicate that the two...

This paper focuses on a theoretical approach to access the fatigue life of flexible pipes. This methodology employs functions that convert forces and moments obtained in time-domain global analyses into stresses in their tensile armors. The stresses are then processed by well-known cycle counting methods, and S-N curves are used to evaluate the fatigue damage at several points in the pipe’s cro...