The present invention relates to a photosensitive detector with a composite dielectric gate MOSFET structure and its signal readout method. The gateway is to forward messages using a secure connection through the hostile network, to a customer’s network. A left thigh brace is carried in the cockpit for receiving the left thigh of the kayaker having contoured outer and inner thigh braces for bracing respective outer and inner thigh portions of the kayaker’s left thigh when in the seated position. The metal layer can therefore be formed at the same height as the height of the metal layer. The method further includes determining that the amount of charge in the battery is less than a predetermined charge threshold value. Said process essentially comprises the reduction in volume of expanded polystyrene by means of dissolution in a solvent, separation of the insoluble components, selective precipitation of the polystyrene with an anti-solvent, separation, drying and extrusion of the precipitated polystyrene, recovery by distillation and recycling of the solvent.