In studying the Mach-Zender interferometer and Young’s Double Slit experimental setups, we can observe the wave-particle duality of light using an attenuated laser beam. In the Mach-Zender setup, we demonstrate that the fringe visibility of the interference pattern changes as the analyzing polarizer angle changes which controls “which path” information. In addition, the fringe visibility increa...

We demonstrate an optical bottle beam trap created by interfering two fundamental Gaussian beams with different waists. The beams are derived from a single laser source using a Mach-Zehnder interferometer whose arms have unequal magnifications. Destructive interference of the two beams from the Mach-Zehnder leads to a three-dimensional intensity null at the mutual focus of the beams. We demonst...

We investigate the accuracy of the Godunov scheme applied to the variable cross-section acoustic equations. Contrarily to the constant cross-section case, the accuracy issue of this scheme in the low Mach number regime appears even in the one-dimensional case; on the other hand, we show that it is possible to construct another Godunov type scheme which is accurate in the low Mach number regime.

A semi-coarsened multigrid algorithm with a point block Jacobi smoother for the Euler equations is presented which produces convergences rates independent of grid size for moderate subsonic Mach numbers. By incorporation of local precondition-ing, the performance of the multigrid algorithm can be made largely independent of grid size and Mach number over a range of ow conditions from nearly inc...

SUMMARY Details are given of the static calibration of a hemispherrcal-headed drfferentral pressure yawmeter, 0.6 to 1.2; rn the Mach number range from the xnstrument has a central pitot pressure hole and two pairs of holes m perpendroular planes for flow directron measurement. The results show that ths sensitivity to yaw (for angles up to 8') as determined from pressure differences between opp...

Real-time applications typically operate under strict timing and dependability constraints. Although traditional data replication protocols provide fault tolerance, real-time guarantees require bounded overhead for managing this redundancy. This paper presents the design and evaluation of a window-consistent primary-backup replication service that provides timely availability of the repository ...

OBSERVATIONS. F. Langenhorst, A. Deutsch, U. Hornemann, B. A. Ivanov and E. Lounejeva Bayerisches Geoinstitut (BGI), University of Bayreuth, D-95440 Bayreuth, Germany, ; Inst. f. Planetologie (IfP), University of Münster, D-48149 Münster, Germany, ; Ernst-Mach-Institut (EMI), Am Klingelberg 1, D-79588 Efringen-Kirchen, Germany, <hornem...

Two-dimensional simulation results are presented that capture at great detail the temporal evolution of Mach reflection triple point sub-structures intrinsic to gaseous detonation waves. The observed patterns are classified by shock polar analysis for realistic, thermally perfect but nonreactive gases. A diagram of the transition boundaries between possible Mach reflection structures is constru...

Reflection of a shock from a solid wedge is a classical problem in gas dynamics. Depending on the parameters either a regular or a irregular (Mach-type) reflection results. We construct regular reflection as an exact self-similar solution for potential flow. For some upstream Mach numbers MI and isentropic coefficients γ, a solution exists for all wedge angles θ allowed by the sonic criterion. ...

In the present work, we are interested in the direct numerical simulation of the compressible Euler and Navier Stokes equations at low Mach number regime. First, we propose a review of existing work on the subject in order to identify the issues raised by the simulation of in this kind of flow, and the existing relevant solutions. Then, we will test different selected compressible low Mach solv...