Abstract: Gathering tennis balls during practice or Matches is frequently a tiresome and time-consuming activity, involving considerable hand labour and resulting in interference with play. This ...

The free, popular Signal communications app will add quantum-resistant encryption to its messaging system, aiming to protect ...

Abstract: The paper studies the mechanical modelling and optimal design of a heliostat lens farm for a tower photovoltaic plant. In this paper, geometrical optics, coordinate transformation and ...