Abstract: The present exemplary embodiment relates to a negative active material precursor and its manufacturing method. According to an exemplary embodiment, it is disclosed a negative active material precursor, comprising: a stacked portion disposed at a center of the negative active material precursor and where graphite particles are stacked; and at least one of void portion disposed between the center and a surface portion of the negative active material precursor, wherein, an average particle diameter D50 is 10 to 18 ?m, and the below equation 1 is satisfied. ( D ? 90 - D ? 10 ) / D ? 50 ? 1. ? Equation ? 1 ? (In equation 1, D10, D50, and D90 mean particle diameters corresponding to 10, 50, and 90% volume accumulation from a small size, respectively.

Abstract: The present embodiment relates to an anode active material precursor, an anode active material, and a method for manufacturing same. An anode active material precursor according to an embodiment comprises: a carbon-based material comprising a metal compound; and a petroleum-based pitch, wherein the petroleum-based pitch comprises, on the basis of 10 parts by weight of the carbon-based material, 3 to 10 parts by weight, the softening point of the petroleum-based pitch may be 220-280° C., and the content of the metal compound may be greater than or equal to 10 ppm.

Abstract: The invention pertains to a measuring system for the conductivity of supercritical geothermal fluid, featuring a reaction control unit with a reaction vessel lined with corundum ceramic and containing a stirrer, a pressure control unit including a booster pump connected to Ar gas and an air compressor, a flow control unit with a flowmeter, and a temperature control unit comprising a heating furnace with thermocouples both inside and outside the reaction chamber. An electrical signal monitoring unit with electrodes fitted through a corundum capillary into the ceramic lining measures current and voltage. The invention also details a method for measuring conductivity, highlighting how water-rock interactions in supercritical geothermal fluids affect conductivity changes.

Abstract: The invention pertains to a measuring system for the conductivity of supercritical geothermal fluid, featuring a reaction control unit with a reaction vessel lined with corundum ceramic and containing a stirrer, a pressure control unit including a booster pump connected to Ar gas and an air compressor, a flow control unit with a flowmeter, and a temperature control unit comprising a heating furnace with thermocouples both inside and outside the reaction chamber. An electrical signal monitoring unit with electrodes fitted through a corundum capillary into the ceramic lining measures current and voltage. The invention also details a method for measuring conductivity, highlighting how water-rock interactions in supercritical geothermal fluids affect conductivity changes.

Abstract: Disclosed are a separator for an electrochemical device, comprising a porous base membrane, a coating layer disposed on at least one side of the porous base membrane and at least one channel for ionic flow, wherein the coating layer comprises at least one organic material with, for example, a core-shell structure that melts when the electrochemical device is overheated to a temperature that is higher than the melting point of the at least one organic material to block the at least one channel for ionic flow; as well as an electrochemical device comprising the separator and a method for making the separator.

Abstract: Disclosed are a separator for an electrochemical device, comprising a porous base membrane, a coating layer disposed on at least one side of the porous base membrane and at least one channel for ionic flow, wherein the coating layer comprises at least one organic material with, for example, a core-shell structure that melts when the electrochemical device is overheated to a temperature that is higher than the melting point of the at least one organic material to block the at least one channel for ionic flow; as well as an electrochemical device comprising the separator and a method for making the separator.

Abstract: Provided is a display device including, a substrate, a display panel disposed on the substrate, a sealing substrate disposed over the display panel, a sealing part disposed between the substrate and the sealing substrate to at least partially surround the display panel, and a buffer part proximate to a corner region of the sealing part to at least partially surround the corner region of the sealing part, the buffer part extending from the substrate to the sealing substrate.

Abstract: Provided is a display device including, a substrate, a display pan& disposed on the substrate, a sealing substrate disposed over the display panel, a sealing part disposed between the substrate and the sealing substrate to at least partially surround the display panel, and a buffer part proximate to a corner region of the sealing part to at least partially surround the corner region of the sealing part, the buffer part extending from the substrate to the sealing substrate.

Abstract: A method for providing broadcast service includes: (a) receiving schedule information for a multiple number of broadcast programs from a headend; (b) outputting a program selected by a user as a full screen; and (c) outputting a program navigation page by using the schedule information of the multiple broadcast programs if a pre-designated hand motion is detected. The program navigation page includes one of a category list page and a program list page, the category list page containing categories grouped according to use time, and the program list page containing programs belonging to each category. Depths are assigned in the order of the category list page, the program list page, and the A/V page, from higher to lower depths. A movement from a higher to a lower depth and a movement from a lower to a higher depth are performed via hand motions having different directionalities.