A quantitative understanding of transmission electron microscopic (TEM) images usually involves simulations as a central part. In the TEM community, the Bloch wave approach is frequently applied to simulate diffracted beam amplitudes in crystalline specimen. For example, the CELFA [1] technique compares the composition-dependent contrast in experimental (200) lattice fringe images with Bloch wa...

Obstructing the passage of blast waves is an effective method mitigating pressures downstream obstacle. To this end, interaction between a wave and simplified structural shape, such as cylinder, has been widely investigated to understand complex flow pattern that ensues around The patterns include interference zones incident wave, diffracted other secondary in region. Such are responsible for c...

the conventional approach to seismic data analysis consists of two main steps: estimating seismic velocities, (the subsurface macro-model), and seismic imaging, (mapping of the reflected seismic energy to the reflector positions). the aim and the major challenge in the seismic data analysis is the construction of the best undistorted image. this challenge would be more problematic when geometri...

We present a new method for reconstructing digitally recorded off-axis Fresnel holograms. Currently-used reconstruction methods are based on the simulation and propagation of a reference wave that is diffracted by the hologram. This procedure introduces a twin-image and a zero-order term which are inherent to the diffraction phenomenon. These terms perturb the reconstruction and limit the field...

Abstract Conventional methods used to identify the dynamical properties of unknown media from scattered mechanical waves rely on analytical or numerical manipulations wave equation. These show their limitations in scenarios where analyzed medium is moderately sized and diffraction material edges influences fields significantly, such as non-destructive diagnostics metamaterial characterization. ...

For the observer at infinity, a Schwarzschild black hole serves as an attractive opaque disk with radius of $$3\,\sqrt 3 M$$ that will produce diffraction pattern gravitational waves (GWs). In this study, we demonstrate bright spot, which is effect analogous to Poisson-Arago spot in optics, appear when ingoing (quasi-)plane GW diffracted by hole. Here, propose GWs described exact solution using...

The two main problems in hypersonic vehicles are wave drag and aerodynamic heating. This work proposes a novel method for reduction by combining spikes with the plasma synthetic jet actuator (PSJA). Numerical simulations performed to better understand mechanism an incoming flow at Mach 6. results suggest that field is affected primarily diffracted jet. maximum reaches 47.7% spike compared oppos...