An optical element for homogenizing and, possibly, concentrating the output from high-power two-dimensional semiconductor laser arrays, which has the basic shape of a convex-flat cylindrical lens with a facet cut into the convex surface for each individual semiconductor laser bar. The apparatus receives discovery resource information from a base station, sends a discovery signal based on the discovery resource information, and receives from at least one user equipment a request for relaying with the base station based on the discovery signal. This allows the critical shape to be designed much closer to the reference layer then it could without the angled extension feature. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into X18B725 through backcross conversion andor transformation, and to the maize seed, plant and plant part produced thereby. Audio warnings may accompany the visual warnings, and can be output with greater intensity when no visual devices are within the driver’s view. This bag is remarkable by the fact that said sheets include on their outer faces, and outside said slider, abutment means capable of immobilizing said sheets relatively to said slider along a direction generally perpendicular to the displacement axis of the slider.