A transparent-cathode discharge, obtained by negatively biasing two concentric metallic grid spheres with axi-symmetrically aligned orifices was investigated by non-linear dynamic methods. The ...

Concentric circular tri-tubular structure. Nested and concentric circular tri-tubular system is crushed in the axial direction by a 1132 kg rigid mass with a 4.22 m/s initial velocity. The bottom line ...

A team of Spanish researchers recently reported the discovery of several large concentric circular structures, resembling artificial walls, which are believed to share similarities with Plato's ...

Look, No Grid! NYC Reimagined As A Circular Metropolis. Mapmaker Max Roberts ditches New York’s linear grid for concentric circles in this new subway map. SHARE.