Abstract: Disclosed are a method and apparatus for determining an RA-RNTI. In the present application, a base station receives a random access preamble sent by a terminal; the base station determines an RA-RNTI according to a time-frequency resource occupied by the random access preamble, and the time-frequency resource is a time-frequency resource of an orthogonal frequency division multiplexing (OFDM) symbol level; and the base station sends a random access response message, and the random access response message includes downlink control information allocated, by the base station, for the terminal, and the downlink control information is scrambled using the RA-RNTI. By means of the present application, an RA-RNTI can be determined during a random access process of an NR system.

Abstract: Method and apparatus for laser texturing a magnetic recording disk substrate, including a disk-loading and unloading conveyer, a pair of disk-carrying spindles and associated laser systems disposed in spaced-apart relationship, and a disk-handling mechanism disposed between the conveyer and the set of spindles and operative to obtain a first disk rom the conveyer, place it on a first spindle for texturing on one side, remove the partially textured first disk from the first spindle, flip it upside down and place it on a second spindle for texturing on the other side, while at the same time obtaining a second disk from the conveyor and loading it onto the first spindle for texturing on one side. A third disk is then removed from the conveyor and loaded onto the first spindle as the second disk is removed therefrom, flipped over and placed on the second spindle as the first disk is removed therefrom and returned to the conveyor.