This paper describes the implementation of an algorithm capable of enumerating a large number of propagation paths in interactive time for the special case of 2.5D environments. A two-dimensional beam tracing algorithm is used to compute the projection of the propagation paths in the plane and the heights lost in this projection, allowing the reconstruction of the actual propagation paths in th...

Most Ground Penetrating Radar (GPR) measurements are performed on nearly flat areas. If strongly dipping reflections and/or diffractions are present in the GPR data, a classical migration processing step is needed in order to determine the geometries of shallow structures. Nevertheless, a standard migration routine is not suitable for GPR data collected on areas showing a variable and large top...

The course of pyrolysis pea husks was studied. It stated that the compaction a sample during its causes an almost two-fold increase in content hydrocarbons composition volatile products temperature range 350–470 °C. Low density polyethylene (LDPE), novolac, and coal tar pitch (CTP) wastes were added to feedstocks amount 2 wt% order decrease contribution saturated unsaturated along with oxygen-c...

In recent years, diffusion tensor imaging (DTI) and its variants have been used to describe fiber orientations and q-space diffusion MR was proposed as a means to obtain structural information on a micron scale. Therefore, there is an increasing need for complex phantoms with predictable microcharacteristics to challenge different indices extracted from the different diffusion MR techniques use...

The surface-related multiple elimination (SRME) method has proven to be successful on a large number of data cases. Most of the applications are still 2D, as the full 3D implementation is still expensive and under development. However, the earth is a 3D medium, such that 3D effects are difficult to avoid. Most of the 3D effects come from diffractive structures, whereas the specular reflections ...

Ultra-compact and tunable devices for terahertz (THz) beam manipulation are highly desired in wireless communication radar scanning. Although the appearance of Pancharatnam-Berry (PB) metasurface has provided strategies THz scanning, active output power distribution is still difficult to achieve, flexibility limited by a single metasurface. In this work, we demonstrated an all-dielectric cascad...

in this paper, a new propagation model based on utd for multiple diffraction paths in cellular mobile radio communications in urban environments is proposed. moreover, the most rigorous novel utd-based expressions for multiple diffractions by buildings and excess path losses are d - rived and analyzed. for this purpose, building rows are supposed to have rectangular cross-sections with the same...