Abstract: The present disclosure relates to a method and an apparatus for manufacturing a core-shell catalyst, and more particularly, to a method and an apparatus for manufacturing a core-shell catalyst, in which a particle in the form of a core-shell in which the metal nanoparticle is coated with platinum is manufactured by substituting copper and platinum through a method of manufacturing a metal nanoparticle by emitting a laser beam to a metal ingot, and providing a particular electric potential value, and as a result, it is possible to continuously produce nanoscale uniform core-shell catalysts in large quantities.

Abstract: To provide a reactor to improve evenness in the thickness of shell metals coated on the surface of core particles by increasing area sizes in the reactor chamber to control electric potentials, the present invention is configured to comprise a top surface able to move up and down while serving as a working electrode, a wall serving as a working electrode, a bottom surface, a standard electrode, a power supplying part and a solution injecting part, wherein the top surface can move up and down automatically by an electric motor or manually. Also, the top surface is configured to be suitable for the interior diameter of the reactor chamber, for solutions inside the reactor chamber not to leak from the top surface or from the crevice between the top surface and the wall of the reactor chamber. The bottom surface of the reactor chamber may comprise an impeller or an ultrasonic wave diffuser to bring about even diffusion in the reactor chamber.

Abstract: A block copolymer, an ion-exchange membrane including the block copolymer and a method of preparing the block copolymer are provided. The block copolymer may include a hydrophobic repeating unit and a hydrophilic repeating unit.

Abstract: Provided are a flight simulation and control method of a unmanned aerial vehicle with regenerative fuel cells and solar cells for high altitude long endurance, and a control apparatus thereof. The high altitude long endurance simulation method for an unmanned aerial vehicle based on regenerative fuel cells and solar cells includes: a variable inputting step of inputting design variables of the unmanned aerial vehicle based on regenerative fuel cells and solar cells; a modeling step of performing modeling of the unmanned aerial vehicle based on regenerative fuel cells and solar cells using the design variables input in the variable inputting step; and an analyzing step of analyzing a modeling result in the modeling step to perform a high altitude long endurance simulation while controlling any one of the design variables input in the variable inputting step.

Abstract: A high-temperature polymer electrolyte membrane fuel cell stack may include a plurality of cell units; a cooling assembly including a plurality of first independent cooling plates disposed on top surfaces of the plurality of cell units, respectively, and a plurality of second independent cooling plates disposed on bottom surfaces of the plurality of cell units, respectively; and a support assembly configured to support the plurality of cell units and the cooling assembly.

Abstract: Provided is a flight path calculating method for high altitude long endurance of an unmanned aerial vehicle based on regenerative fuel cells and solar cells according to an exemplary embodiment of the present invention may include a modeling step, a simulation step, and an analyzing step, and may be configured in a program form executed by an arithmetic processing means including a computer. a flight path searching method and a flight path searching apparatus for performing continuous flight path re-searching on the basis of information measured in real time during a flight of the unmanned aerial vehicle in the stratosphere to change a flight path so that the unmanned aerial vehicle may permanently perform long endurance in the stratosphere is provided.

Abstract: Provided are a reinforced composite membrane and a method of manufacturing the reinforced composite membrane, and more particularly, a reinforced composite membrane including a porous support layer; and an electrolyte membrane layer formed on one surface or each of both surfaces of the porous support layer, at least a portion of the porous support layer being impregnated with an electrolyte, and a method of manufacturing the reinforced composite membrane. The reinforced composite membrane may enhance an interfacial adhesive force between a support and the electrolyte membrane layer, and may be manufactured on a continuous mass production.

Abstract: The present invention relates to a combustion device 100 for burning refractory hazardous gases and a burning method for the combustion device. More particularly, the combustion device 110 for burning refractory hazardous gases, which is provided in a scrubber system 1 for burning waste gases, the combustion device 110 includes: a first porous body 141; a second porous body 142; and an igniter for forming a flame surface 143 at the interior of the combustion device 110, wherein the flame surface 143 formed by the igniter is located between the first porous body 141 and the second porous body 142, and so as to form the flame surface 143, at least one of the first porous body 141 and the second porous body 142 is moved to conduct excess enthalpy combustion.

Abstract: Provided are a metal oxide-carbon nanomaterial composite, a method of preparing the metal oxide-carbon nanomaterial composite, a catalyst, a method of preparing the catalyst, and a catalyst layer that includes the catalyst and that is used for fuel cell electrodes. The metal oxide-carbon nanomaterial composite includes a metal oxide particle having a specific surface area of 5 square meters per gram (m2/g) or less, and a carbon nanomaterial formed on a surface of the metal oxide particle. The catalyst includes a metal oxide-carbon nanomaterial composite in which a carbon nanomaterial is formed on a metal oxide particle, and an active metal particle formed on a surface of the carbon nanomaterial.

Abstract: A small-capacity IMS core is a system that provides support so that a group customer using an IMS service can manage a POTS system and an Internet telephone system in parallel and can manage a non-IMS terminal. This system includes a main control unit (MCU) configured to provide only functions that belong to the functions of an MCU IMS structure and that are required for a group customer, a line interface unit (LIU) configured to be used to extend physical ports of the MCU and a POTS, a SIP gateway configured to convert a standard SIP message into an IMS message, and an FMC controller configured to provide support in order to enable a wireless terminal, such as a wireless IMS terminal/smartphone, to be used in a mobile environment. This system includes an IP communication-based virtual Ethernet back-plane so that the units can exchange information at high speed.

Abstract: A motor having a fluid bearing in which a clearance control unit is provided in a housing so as to stably rotate a rotor shaft of a rotor by controlling a clearance between the rotor shaft and a shaft groove. The clearance control unit includes a clearance control rod inserted into a through hole which passes through the shaft groove from an external side of the housing, and a feed gear for feeding the clearance control rod. One end of the feed gear is rotatably mounted into one end of a groove formed to be connected with the through hole, and the other end of the feed gear is formed to fit a feed screw exposed to the external side of the housing into a screw hole. The feed gear moves the clearance control rod closer to the rotor shaft, causing an increased air pressure between the clearance control rod and the rotor shaft for moving the rotor shaft into center alignment in the shaft groove.

Abstract: A motor includes a rotor bushing having first and second hemispherical grooves formed on top and bottom surfaces thereof, first and second hemispherical bearings inserted into the first and second hemispherical grooves, respectively, and a supporting shaft extending through the rotor bushing and fixed to the first and second hemispherical bearings. Respective heights of the first and second hemispherical grooves measured in the axial direction of the shaft are different from (i.e., are either greater than or less than) the axial depths of the first and second hemispherical grooves, respectively.

Abstract: A conical bearing apparatus is provided which is capable of enhancing productivity by reducing the time required for processing a hemispheric bearing i.e., grinding and lapping. By locating a spacer between a pair of cones, the cones are arranged on a fixing shaft facing each other and then inserted into a bush in which a pair of conical concaves for receiving the cones are formed. The thrust load and the radial load are supported by the dynamic pressure formed between the conical concaves and the dynamic pressure generating grooves formed on the tapered surfaces of the cones. Accordingly, as the bearing is conical shape, it is unnecessary to lap the hemispheric surface for minute clearance between the hemisphere and the hemispheric concave, thereby resulting in easy processing and enhancing the productivity of the bearing.