Abstract: A device for controlling a line connection type fuel cell system and a method for the same are provided. The device for controlling a line connection type fuel cell system includes a plurality of fuel cell modules, an Alternating Current (AC) voltage generator, and a controller to activate the AC voltage generator to generate an AC voltage corresponding to power supplied from a system, and to control the plurality of fuel cell modules to generate a current in synchronization with the AC voltage.

Abstract: A lithium secondary battery for thermal runaway delay, includes an electrode coated with a coating ink prepared by the method The method of preparing a coating ink composition uses expandable graphite (EG) as a starting material to obtain non-oxidized graphene, so there is no reduction process, no acid is used, and through a simple manufacturing process, manufacturing costs and times can be reduced while enabling mass-production and causing no environmental problems. Further, the coating ink composition prepared by the method of preparing the coating ink composition can improve properties such as viscosity, dispersion stability, electrical conductivity, and substrate adhesion of the ink by using a polymer as an additive. In addition, by coating the electrode of the secondary battery with the coating ink composition containing graphene nanoplatelets or non-oxidized graphene, thermal runaway due to overload of thermal energy generated within the secondary battery can be delayed and prevented.

Abstract: A device for controlling a line connection type fuel cell system and a method for the same are provided. The device for controlling a line connection type fuel cell system includes a plurality of fuel cell modules, an Alternating Current (AC) voltage generator, and a controller to activate the AC voltage generator to generate an AC voltage corresponding to power supplied from a system, and to control the plurality of fuel cell modules to generate a current in synchronization with the AC voltage.

Abstract: A tape used to attach a notice to an object through an adhesive strength includes: a first side attached to the object through a first adhesive strength; and a second side which has a second adhesive strength weaker than the first adhesive strength and to which the notice is attached, wherein, with such a configuration, using the tape having different adhesive strengths on both sides, the first side with the stronger adhesive strength is attached to the object, and the notice is attached to the second side with the weaker adhesive strength, and thus there is an effect that the tape can be attached to various objects to post a notice.

Abstract: The vehicle control apparatus identifies a fuel cell module in which an error occurs among fuel cell modules included in the fuel cell system and an error type, stops the fuel cell module in which the error occurs, except for a case where the same error consecutively occurs in the same fuel cell module among the fuel cell modules, and operates the fuel cell module, in which the error occurs, again.

Abstract: An apparatus for converting power of a fuel cell for power generation to remove an open voltage of the fuel cell and a method thereof are provided. A power converter converts and supplies power generated by the fuel cell to a system or load. A controller maintains a current linkage to the system or load to reduce an open circuit voltage (OCV) of the fuel cell, after power generation of the fuel cell is ended. The apparatus removes the OCV of the fuel cell to reduce performance and life of the fuel cell, when the fuel cell is stopped.

Abstract: An apparatus for converting power of a fuel cell for power generation to remove an open voltage of the fuel cell and a method thereof are provided. A controller links current to a system or load to reduce an open circuit voltage (OCV) of the fuel cell before power generation of the fuel cell is started, after the fuel cell is started. A power converter converts and supplies power generated by the fuel cell to the system or load. The apparatus removes an OCV of a fuel cell stack to prevent performance and life of the fuel cell from being reduced.

Abstract: A device for controlling a line connection type fuel cell system and a method for the same are provided. The device for controlling a line connection type fuel cell system includes a plurality of fuel cell modules, an Alternating Current (AC) voltage generator, and a controller to activate the AC voltage generator to generate an AC voltage corresponding to power supplied from a system, and to control the plurality of fuel cell modules to generate a current in synchronization with the AC voltage.

Abstract: A fuel cell cooling system and a control method are provided. The fuel cell cooling system includes a fuel cell module having a fuel cell stack and a first cooling water line through which primary cooling water undergoing heat exchange with the fuel cell stack to adjust a temperature of the fuel cell stack circulates. A cooling module includes a second cooling water line through which secondary cooling water circulates and a cooling tower is configured to adjust a temperature of the secondary cooling water. A heat exchanger is connected between the first cooling water line of the fuel cell module and the second cooling water line of the cooling module for heat exchange. A controller configured to operate the fuel cell module and the cooling module.

Abstract: A generating system using fuel cells, includes a plurality of fuel cell stacks; a plurality of power converters, wherein each of the power converters is connected to a corresponding fuel cell stack of the fuel cell stacks and configured for adjusting an output of the connected fuel cell stack and performing direct current—alternating current conversion; and a controller which is configured to individually control the respective power converters so that a total output of the plurality of power converters converges on a required system output while varying the output of the respective power converters, and a method for controlling the same.

Abstract: A container type power generation fuel cell system may include a container having a door in one side or both sides; a plurality of stack modules mounted in the container and each having fuel cell stacks stacked and separately connected to each other in an attachable/detachable manner; a fuel supply line connected to a fuel supply outside the container, inserted into the container, and connected to the fuel cell stacks to supply hydrogen and air that are fuel gases; an exhaust line forming a channel through which exhaust gas produced by the fuel cell stacks flows to discharge the exhaust gas outside the container; a cooling fluid circulation line connected to the fuel cell stacks to exchange heat and passing cooling fluid therethrough; and a power converter converting DC voltage produced by the stack modules into AC voltage, in which the stack modules may be integrally managed.

Abstract: A fuel cell cooling system and a control method are provided. The fuel cell cooling system includes a fuel cell module having a fuel cell stack and a first cooling water line through which primary cooling water undergoing heat exchange with the fuel cell stack to adjust a temperature of the fuel cell stack circulates. A cooling module includes a second cooling water line through which secondary cooling water circulates and a cooling tower is configured to adjust a temperature of the secondary cooling water. A heat exchanger is connected between the first cooling water line of the fuel cell module and the second cooling water line of the cooling module for heat exchange. A controller configured to operate the fuel cell module and the cooling module.

Abstract: The present invention relates to a method for estimating a geothermal gradient and an apparatus for estimating a geothermal gradient, and provides a method for estimating a geothermal gradient, the method comprising the steps of: calculating, at each of a plurality of points, a seismic wave crustal attenuation characteristic parameter of a seismic wave measured on the basis of the measured seismic wave information, with respect to the plurality of points; deriving an artificial neural network relational formula on the basis of the seismic wave crustal attenuation characteristic parameter; and calculating a geothermal gradient of an area of interest excluding the plurality of points on the basis of the artificial neural network relational formula, such that the geothermal gradient is estimated at a low cost by using a highly reliable method.

Abstract: Disclosed herein are iron oxide nanoparticles prepared through high-temperature thermal decomposition of an Fe3+ precursor and an M+ or M2+ (M=Li, Na, K, Mg, and Ca) precursor in an oxygen atmosphere. The iron oxide nanoparticles are nanoparticles, in which an alkali metal or alkali earth metal is doped into an Fe vacancy site of ?-Fe2O3, and generate explosive heat even in a biocompatible low AC magnetic field. Through both in vitro and in vivo tests, it was proven that cancer cells could be killed by performing low-frequency hyperthermia using the iron oxide nanoparticles set forth above.

Abstract: The present invention relates to a method for estimating a geothermal gradient and an apparatus for estimating a geothermal gradient, and provides a method for estimating a geothermal gradient, the method comprising the steps of: calculating, at each of a plurality of points, a seismic wave crustal attenuation characteristic parameter of a seismic wave measured on the basis of the measured seismic wave information, with respect to the plurality of points; deriving an artificial neural network relational formula on the basis of the seismic wave crustal attenuation characteristic parameter; and calculating a geothermal gradient of an area of interest excluding the plurality of points on the basis of the artificial neural network relational formula, such that the geothermal gradient is estimated at a low cost by using a highly reliable method.

Abstract: Disclosed herein are iron oxide nanoparticles prepared through high-temperature thermal decomposition of an Fe3+ precursor and an M+ or M2+ (M=Li, Na, K, Mg, and Ca) precursor in an oxygen atmosphere. The iron oxide nanoparticles are nanoparticles, in which an alkali metal or alkali earth metal is doped into an Fe vacancy site of ?-Fe2O3, and generate explosive heat even in a biocompatible low AC magnetic field. Through both in vitro and in vivo tests, it was proven that cancer cells could be killed by performing low-frequency hyperthermia using the iron oxide nanoparticles set forth above.

Abstract: In a method of driving an organic light emitting display device, the organic light emitting display device includes: a plurality of data lines; a plurality of scan lines; and a plurality of pixels coupled to the data lines and the scan lines, the method includes: applying dummy-data signals and pre-data signals to the pixels from respective ones of the scan lines during a non-emission period; and non-sequentially applying scan signals and data signals to the pixels from the respective ones of the scan lines during an emission period, wherein the data signals include data information corresponding to respective subfields in a unit time.