Abstract: In a private wireless high-speed data system and data service method, a private pDLR for handling authentication of a terminal entering a private network and call processing is arranged in a private (premises) EV-DO wireless network and session information of the corresponding terminal is received from a data location register (DLR) of the public EV-DO network and is stored in a database of the private pDLR only when the terminal entering the private EV-DO wireless network requests the call connection for the first time, and the call authentication is performed. The call processing is performed using the session information for the corresponding terminal stored in the private pDLR in when the call connection is requested from the terminal entering the private network at least two or more times.

Abstract: A laser power control device for use in an optical recording and/or reproducing apparatus that records data on and/or reproduces data from an optical recording medium by driving a laser diode with a laser diode driver.

Abstract: A fluidized bed reduction reactor (100) for supplying a reduced iron to a melter-gasifier (1) of a smelting reduction system includes an exhaust gas supply unit (3) for supplying an exhaust gas to a reduction gas supply tube (4) interconnecting the melter-gasifier (1) and fluidized bed reduction furnaces (20, 30, 40) when the pressure of the reduction gas in each fluidized bed reduction furnace radically decreases with the occurrence of pressure peak in the melter-gasifier (1). The fluidized bed reduction reactors further include iron ore flow blockage prevention units for directly bypassing some of the reduction gas from each iron ore discharge tube (33, 43) disposed between the neighboring furnaces to the scrubber (50) when the inner pressure of the melter-gasifier (1) radically increases with the occurrence of pressure peak, and a backup gas supply unit supplying a backup nitrogen gas to the bottom of each fluidized bed reduction furnace when a nozzle of a distribution plate (24, 34, 44) is clogged.

Abstract: An apparatus for controlling a monitor photo diode (PD) of an optical pickup system monitors an optical power signal output for writing data on or reading data from a disk. The apparatus includes a comparator which compares a voltage signal corresponding to the optical power signal output from the LD with a predetermined reference voltage signal, and a gain selector which selectively issues a gain output from the comparator depending on the type of the optical power signal output from the LD.

Abstract: A high-speed wireless data system for providing services for either a public wireless network terminal or a private wireless network terminal, the system comprising: a base station for assigning an Unicast Access Terminal Identifier to each of terminals of the public wireless network and the private wireless network through a wireless channel to provide services of the high-speed wireless data system for each of the terminals; a base station controller for controlling implementation of different authentications for the terminals, assignment of an Unicast Access Terminal Identifier to each terminal, management of a session for each terminal, and data transmitted or received by each terminal; a private authentication system including an authentication database for authenticating the private wireless network terminal; a data location register including service information of the public wireless network terminal and information for receiving services from the private wireless network of the private wireless netwo

Abstract: The present invention relates to a method for monitoring a system by searching a screen buffer, more particularly, for a system management board to detect screen messages output when a system boots and to inform a remote system manager of the booting status and the abnormality of the system. The method according to the present invention comprises steps of: reproducing the data of a screen buffer of video RAM area into a temporary buffer in a program; searching for specific BIOS messages in the temporary buffer reproduced from the screen buffer; and reporting the search result to a remote system manager.

Abstract: An apparatus and a method for manufacturing molten pig iron by using a fine iron ore are disclosed. Coal is used to produce a reducing gas, and a fine iron ore is used to produce a molten iron and a reduced iron in a simple and efficient manner. The apparatus for manufacturing a molten iron by directly using coal as the fuel is as follows. A high temperature reducing gas is sent from a melter-gasifier to a fluidized bed lime stone calcining furnace to calcine the lime stone. The reducing gas is supplied to a second fluidized bed reducing furnace so as to manufacture a reduced iron directly. An off-gas from the second fluidized bed reducing furnace is supplied to a first fluidized bed reducing furnace (disposed above the second fluidized bed reducing furnace) to pre-heat and pre-reduce the fine iron ore. The calcined lime stone and the finally reduced iron are supplied to a melter-gasifier to manufacture a molten pig iron.