We present improved worldline numerical algorithms for high-precision calculations of Casimir interaction energies induced by scalar-field fluctuations with Dirichlet boundary conditions for various Casimir geometries. Significant reduction of numerical cost is gained by exploiting the symmetries of the worldline ensemble in combination with those of the configurations. This facilitates high-pr...

We carry out the spatially periodic homogenization of nonlinear bending theory for plates. The derivation is rigorous in the sense of Γ-convergence. In contrast to what one naturally would expect, our result shows that the limiting functional is not simply a quadratic functional of the second fundamental form of the deformed plate as it is the case in nonlinear plate theory. It turns out that t...

The first description of the static characteristics of a device called magnetron was described by A. W. Hull in 1921. The tube had a linear filament in a coaxial cylindrical plate. The plate cylinder was surrounded by a winding, used to generate a magnetic field. The radial electric field and the superimposed magnetic field forced electrons to follow circular orbits before reaching anode. If th...

Herman Helmholz had his pupil Zahnz construct a filter out of a porous porcelain cylinder, and this form of apparatus was also used by Kehrer.3 Hermann modified Zahn’s method and used powdered porous plate to adsorb the casein. Tiemann, however, several years later made extensive use of a method devised by Lehmann,c in which the milk was placed upon a slightly concave, porous plate, whose surfa...

In this study, passive and active flow control methods were used together to manipulate the around a circular cylinder. The experiments conducted in wind tunnel for Reynolds number range of 4000 10000 based on diameter cylinder (D). A splitter plate was as device its length chosen be about 3.75D. Plasma actuators placed at position ±90° an device. Combining methods, greater reduction drag coeff...

Mechanical degradation by shear is one of the mechanisms that limits life-time lubricating grease in a rolling bearing. It results change micro-structure thickener–oil system, leading to bleed and consistency. The resistance can be quantified using worker. In this article, novel approach described, where worker used measure rheological properties situ, while aging grease. energy pressure losses...

This paper discusses development of physics-based models for bistatic scattering. We generalize parametric equations for monostatic scattering mechanisms in a plane to achieve analogous bistatic approximations. Combination of these mechanisms, as separable azimuth and elevation components, allows 3-D modelling of six scattering primitives: sphere, tophat, trihedral, dihedral, cylinder, and flat...