Abstract:
Disclosed are a digital display device and a method for controlling the same. According to an embodiment of the present invention, the method for controlling a digital display device connected to at least one network comprises the steps of: receiving a command for a channel selection from a remote controller; receiving first content (e.g. TV program, etc.) through at least one network when a first channel is selected; outputting video data and audio data corresponding to the received first content (e.g. TV program, etc.); storing at least one content (e.g. TV program, etc.) in an internal or external memory; accessing the internal or external memory when a second channel is selected; extracting second content (e.g. TV program, etc.) stored in the accessed internal or external memory; and outputting video data and audio data corresponding to the extracted second content (e.g. TV program, etc.).
Abstract:
The present invention relates to a high-performance field effect transistor including a graphene channel layer. According to one embodiment of the present invention, the field effect transistor includes: a substrate; a grapheme channel layer which is placed on the substrate and includes a slit; a source electrode and a drain electrode which apply a voltage to the graphene channel layer and are placed at an interval; a gate electrode which forms an electric field in the graphene channel layer; and a gate insulation layer which is placed between the graphene channel layer and the gate electrode.
Abstract:
PURPOSE: A cooperative diversity method and a cooperative diversity system using an opportunistic relaying technique are provided to select an optimal relaying device in consideration of interference of a channel even in a system of a multi-cell environment to transmit a signal to a receiver through the selected relaying device, thereby increasing transmission efficiency. CONSTITUTION: A cooperative diversity system comprises a transmitter, a plurality of relaying devices, and a receiver. The transmitter transmits a signal to the plurality of relaying devices(S31). A relaying device is selected among the plurality of relaying devices(S32). The selected relaying device maximizes the SINR(Signal-to-Interference plus Noise Ratio) between the relaying device and the receiver. The selected relaying device transmits the transmitted signal to the receiver(S33).