Abstract: Ultra fine TaC-transition metal based complex powder is prepared by: dispersing a mixture of a Ta-containing material and a transition metal-containing water soluble salt into a solvent; stirring the mixture and spray-drying the stirred material to obtain precursor powder; calcining the precursor powder to form ultra fine Ta-transition metal complex oxide powder; mixing the ultra fine Ta-transition metal complex oxide powder with nano-sized carbon particles, followed by drying to obtain complex oxide powder; and subjecting the dried complex oxide powder to reduction/carburization in a non-oxidizing atmosphere.

Abstract: A method of discovering at least one of a homogeneous and a heterogeneous network module to perform handover with in a wireless mobile communication network is disclosed. More specifically, the method includes establishing a network handover module for converging information from at least one network interface module associated with at least one of a homogeneous and a heterogeneous network handover module into a unified presentation and transmitting a broadcast request message from a mobile station (MS) to a source point of attachment (PoA) which transmits the broadcast request message to at least one interface module to identify whether the at least one interface module supports at least one of the homogeneous and the heterogeneous network handover module and a capability of the at least one of the homogeneous and the heterogeneous network handover module.

Abstract: The biaxially oriented, white polyester film of the present invention having improved flame-retardancy, covering ability, flexibility and heat-resistance comprises a polyester resin having an intrinsic viscosity of 0.4 to 0.9 dl/g, a flame-retardant which is alkylene bistetrabromophthalimide or decabromodiphenylalkane, and a fluorescent whitening agent, said polyester film being biaxially drawn at a total draw ratio of 9 or more.

Abstract: The primitives between an upper management layer and the MAC layer within a mobile station and a base station are defined in order to specify and clarify the operations within the protocol stack layers in a broadband wireless access system to allow a mobile station to perform scanning procedures. Media Independent Handover (MIH) procedures can be achieved because the NCMS and MIH layer can communicate through use of these primitives.

Abstract: In a method of forming a thin layer having a desired composition, a source gas is provided onto a substrate loaded in a chamber for a first time, and the source gas is chemisorbed onto the substrate. While the source gas is provided, a plasma is generated in the chamber for a second time to change the chemisorbed source gas into the thin layer having the desired composition. The thin layer may have a stoichiometrical composition or a non-stoichiometrical composition.

Abstract: The primitives between an upper management layer and the MAC layer within a mobile station and a base station are defined in order to specify and clarify the operations within the protocol stack layers in a broadband wireless access system to allow a mobile station to perform sleep mode. Media Independent Handover (MIH) procedures can be achieved because the NCMS and MIH layer can communicate through use of these primitives.

Abstract: The primitives between an upper management layer and the MAC layer within a mobile station and a base station are defined in order to specify and clarify the operations within the protocol stack layers in a broadband wireless access system to allow a mobile station to execute handover. Media Independent Handover (MIH) procedures can be achieved because the NCMS and MIH layer can communicate through use of these primitives.

Abstract: A Switched Reluctance (SR) generator having improved efficiency at low and high speed is disclosed. The SR generator includes a step-up converter for controlling an excitation voltage of an excitation capacitor capable of providing a phase winding with an excitation current. Therefore, the SR generator can control the excitation current, and can provide a phase winding with a sufficient excitation current, thereby improving efficiency. The step-up converter is arranged between a battery capable of storing generated power and the excitation capacitor, boosts a voltage of the battery, and provides the excitation capacitor with the boosted voltage. Therefore, the SR generator does not include an additional power-supply unit for a boosting function, resulting in simplification of an overall structure and reduction of a production cost.

Abstract: Disclosed is an SR (switched reluctance) generator with improved generation capability in a low-speed range. The SR generator is configured such that an inductance of a phase winding wound around a stator is increased in a low-speed range and is reduced in a high-speed range. Accordingly, a variation rate of the inductance relative to a phase angle is increased in a low-speed range, resulting in an increased output energy in a low-speed range and an improved generation efficiency. The phase winding of the stator may be configured to have a single phase. Accordingly, since the generator is configured with the reduced number of switches, it can be manufactured inexpensively and simply.

Abstract: The primitives between an upper management layer and the MAC layer within a mobile station and a base station are defined in order to specify and clarify the operations within the protocol stack layers in a broadband wireless access system to allow management of a mobile station. Media Independent Handover (MIH) procedures can be achieved because the NCMS and MIH layer can communicate through use of these primitives.

Abstract: The primitives between an upper management layer and the MAC layer within a mobile station and a base station are defined in order to specify and clarify the operations within the protocol stack layers in a broadband wireless access system to allow a mobile station to perform a method of connecting to the network. Media Independent Handover (MIH) procedures can be achieved because the NCMS and MIH layer can communicate through use of these primitives.

Abstract: Disclosed herein is an upright vacuum cleaner having a movement control grip that is capable of performing switch between automatic operation mode and manual operation mode on the movement control grip. The grip comprises a grip body, having a square section, connected to the upper end of a cleaner body while being bent to the cleaner body, upper and lower guide members vertically connected to each other while surrounding the grip body such that the upper and lower guide members can be slid along the outer surface of the grip body, a grip returning unit disposed at the grip body for resiliently returning the upper and lower guide members to their original positions, and a grip sensor unit mounted at the grip body for sensing the forward or rearward movement direction of upper and lower guide members relative to the grip body.

Abstract: Methods of filling trenches/gaps defined by circuit elements on an integrated circuit substrate are provided. The methods include forming a first high-density plasma layer on an integrated circuit substrate including at least one trench thereon using a first reaction gas. The first high-density plasma layer is etched using an etch gas including nitrogen fluoride gas (NF3). A second high-density plasma layer is formed on the etched first high-density plasma layer using a second reaction gas including nitrogen fluoride.

Abstract: Disclosed is a motor drive control device which uses mechanical switches configured in an H-bridge shape and can protect the mechanical switches from being damaged and minimize a voltage chattering problem occurring upon switching on and off. The motor drive control device includes: two relay switching units which are coupled to both sides of a motor and each of which is formed in an H-bridge shape and is connected to an output terminal of a bridge circuit; a switching unit which controls a voltage source applied to the relay switching units; and an inverter controller which first controls any one of the relay switching units and then controls the switching unit so that the motor starts to operate, and first controls the switching unit and then controls the one of the relay switching units so that the motor comes to a halt.

Abstract: Methods of filling trenches/gaps defined by circuit elements on an integrated circuit substrate are provided. The methods include forming a first high-density plasma layer on an integrated circuit substrate including at least one trench thereon using a first reaction gas. The first high-density plasma layer is etched using an etch gas including nitrogen fluoride gas (NF3). A second high-density plasma layer is formed on the etched first high-density plasma layer using a second reaction gas including nitrogen fluoride.

Abstract: Disclosed is a method for operating a wavelength-division-multiplexed passive optical network (WDM-PON) including an optical line terminal (OLT) and a plurality of optical network units (ONUs), each of which is connected to the OLT and communicates with the OLT. The method comprises the steps of transmitting a first control channel including allocation information of downstream data channels and allocation information of time slots for the downstream data channels to each of the plurality of ONUs; and transmitting downstream data to the plurality of ONUs using their associated downstream data channels, each having at least one time slot, based on the information included in the first control channel.

Abstract: Provided are an optoelectronic (OE) transmitter integrated circuit (IC) and method of fabricating the same using a selective growth process. In the OE transmitter IC, a driving circuit, which includes a double heterojunction bipolar transistor (DHBT) and amplifies received electric signals to drive an electroabsorption (EA) modulator, and the EA modulator with a multi-quantum well (MQW) absorption layer are integrated as a single chip on a semi-insulating substrate. The MQW absorption layer of the EA modulator and an MQW insertion layer of the DHBT are formed to different thicknesses from each other using a selective MOCVD growth process.

Abstract: A substrate delivering apparatus that delivers a substrate includes a base part, a moving part mounted on the base part so as to perform linear movement and having a rotating body, a pair of frame parts mounted in parallel on opposite sides of the moving part and having heights that are adjustable, and a delivering part that is connected between the pair of frame parts and is vertically displaced according to an adjustment of the heights of the frame parts. Thus, the substrate delivering apparatus is capable of facilitating delivery of a substrate while maintaining structural stability.

Abstract: The present invention is directed to a semiconductor device having a photodetector and a method of fabricating the same. The photodetector includes a visible ray absorbing pattern disposed on a top and/or bottom surface of an interconnection formed at a light shielding area between adjacent photodetectors, which prevents obliquely incident light from reaching an adjacent photodetector.

Abstract: An optical receiver for use in an Optical Network (ON) such as a WPON based on an SCMA scheme. The optical receiver apparatus for use in a Central Office contained in an ON includes: an optical power divider for dividing an input optical signal into first and second optical signals; a frequency generator for generating a oscillation frequency; a phase shifter for shifting a phase of the oscillation frequency; a first optical modulator for modulating the first optical signal with the oscillation frequency; a second optical modulator for modulating the second optical signal with the oscillation frequency phase-shifted; a first photodiode for converting the optical signal modulated by the first optical modulator into a first RF signal; a second photodiode for converting the optical signal modulated by the second optical modulator into a second RF signal; and a differential amplifier for differentially amplifying the first RF signal and the second RF signal.