Eliminating curved refracting lensing components used in conventional projection, imaging and sensing optical assemblies, is critical to enable compactness and miniaturisation of optical devices. A suitable means is replacing refracting lenses with two-dimensional optical media in flat-slab form, to achieve an equivalent optical result. One approach, which has been the focus of intense research...

RC flat slabs supported by an array of columns subjected to the action impulsive pressure were investigated. The designed for static loads according current standards. dynamic responses 4 × 4- and 8 8-column-supported similar, as damage failure. A simplified model consisting a tributary area central column yielded similar results, demonstrating accuracy its reliability. These analyses exhibited...

Late Triassic – Jurassic igneous rocks of the Antarctic Peninsula and Patagonia provide evidence for evolution margin southwestern Gondwana. We present new geochronological (LA-ICP-MS zircon U Pb dates) analyses 12 intrusive volcanic rocks, which are complemented by geochemical isotopic (Hf) as well whole rock (Nd, Sr) data. These combined with similar 73 other previous studies, to constrain ma...