Abstract: The present invention relates to a method of manufacturing thin-film transistors using nanoparticles and thin film transistors manufactured by the method. A hydrophilic buffer layers are deposited on the substrates to facilitate formation of nanoparticle films. Sintered nanoparticles are used as an active layer and dielectric materials of high dielectric coefficient are also used as a gate dielectric layer to form a top gate electrode on the gate dielectric layer, thereby enabling low-voltage operation and low-temperature fabrication.

Abstract: Embodiments of the present invention may provide an apparatus and a method for transmitting and receiving a random access channel (RACH) in a single carrier-frequency division multiple access (SC-FDMA) system. A frequency domain RACH signal may be mapped to a localized sub-frequency band of an entire frequency band available to the SC-FDMA system. A guard band including at least one sub carrier may be allocated between the RACH signal band and other channel signal bands. A guard time may be allocated between the RACH signal and other channel signals in the time domain. The RACH signal may include a short message including information related to a mobile station. The RACH signal may be detected in a frequency based method, a time based method or a sliding matched filter based method. Receiver complexity can be decreased if the RACH signal includes a CAZAC code sequence for a preamble. In such a case, a receive delay may be simply calculated and then adjusted more accurately.

Abstract: A stack type disk changer is capable of not only being designed to have a relatively small overall size and to be simple and mounting more many disks thereon, but also allowing a user to easily withdraw a desired tray and check disks mounted on the respective trays by withdrawing the entire trays in a stairway form.

Abstract: A disk drive includes a main frame; a cartridge slidably installed in the main frame; a plurality of trays stacked in the cartridge and slidably installed therein; an elevation unit for controlling a height of a turn table; a tray selecting unit for locking each tray to a state that each tray can be loaded or unlocking a specific tray among a plurality of locked trays to draw it out of the main frame; a loading unit for loading the specific tray, among the plurality of trays locked by the tray selecting unit to reproduce/record a disk by means of an optical pick-up unit, onto the turn table; and a driving unit for driving the cartridge, the elevation unit, the tray selecting unit and the loading unit.