The radar cross-section patterns of lossy dihedral corner reflectors are calculated using a uniform geometrical theory of diffraction for impedance surfaces. All terms of up to third order reflections and diffractions are considered for patterns in the principal plane. The surface waves are included whenever they exist for reactive surface impedances. The dihedral corner reflectors examined hav...

A dicompartmental Schiff base ligand was synthesized and used for the assembly of a lanthanide grid-like complex. Dinuclear Dy2 tetranuclear Dy4 complexes were isolated from reaction with different dysprosium salt. Single crystal X-ray diffractions show that two DyIII ions in are adopted N3O coordination pockets further coordinated by water molecules, whereas, Dy4, four clamped ligands through ...

While spin striped phases in La2−xSrxNiO4+y for 0.25 < x 0.33 are the archetypal case of a 1D density wave (SDW) phase doped antiferromagnetic strongly correlated perovskites, few information is available on SDW spatial organization. In this context, we have measured variation vector reflection profile by scanning micro X-ray diffractions with coherent beam. We obtained evidence order–disord...

Wavefront healing, in which diffractions interfere with directly traveling waves causing a reduction in recorded traveltime delays, has been postulated to cause a bias towards faster estimated Earth models. This paper reviews the theory from the mathematical physics community that explains the properties of diffractions and applies it to a suite of increasingly complicated numerical examples. W...

Abstract Hydrogels had gained considerable importance in drug delivery systems. Polyacrylic acid/acrylamide (AAc/AAm) and polyacrylic doped with magnetite (AAc/AAm)Fe 3 O 4 hydrogels have been prepared by ɣ -radiations characterized Fourier transform infrared spectra (IR), X-ray diffractions (XRD), scanning electron microscope (SEM) transmittance (TEM). The morphology the particle size were det...