An optical sheet includes a substrate onto which light is incident, and a convex part protruded from the substrate by a predetermined thickness. A thickness of the convex part increases from an edge to a center thereof.
A method of locating a mobile station is provided. In the present invention, the mobile station is capable of communicating with at least three base stations, each having at least two antennas. To estimate the location of the mobile station, the distance between the mobile station an
A high-speed bit assignment method for audio signal is disclosed. The Method is usable by various systems using encoding and decoding, capable of reducing bit assignment time in a compressing method using a psychological acoustic model, increasing a bit assignment ratio by using a ma
