Abstract: A memory device includes: a first memory cell mat that includes first multi-layer level sub word lines positioned over a substrate; a second memory cell mat that is laterally spaced apart from the first memory cell mat and includes second multi-layer level sub word lines; a first sub word line driver circuit that is positioned underneath the first memory cell mat; and a second sub word line driver circuit that is positioned underneath the second memory cell mat, wherein the first sub word line driver circuit is positioned underneath ends of the first multi-layer level sub word lines, and the second sub word line driver circuit is positioned underneath ends of the second multi-layer level sub word lines.

Abstract: A memory device includes: a substrate; a bit line which is vertically oriented from the substrate; a plate line which is vertically oriented from the substrate; and a memory cell provided with a transistor and a capacitor that are positioned in a lateral arrangement between the bit line and the plate line, wherein the transistor includes: an active layer which is laterally oriented to be parallel to the substrate between the bit line and the capacitor; and a line-shaped lower word line and a line-shaped upper word line vertically stacked with the active layer therebetween and oriented to intersect with the active layer.

Abstract: A refrigerator includes a main body and a storage compartment provided inside the main body. A heater assembly partitions the storage compartment into a first storage compartment and a second storage compartment. The heater assembly includes a first case provided to define a surface of the first storage compartment, a second case coupled to the first case to form an accommodation space with the first case and provided to define a surface of the second storage compartment, a fixing unit formed on at least one of an inner surface of the first case and an inner surface of the second case, and a surface heater fixed to at least one of the inner surface of the first case and the inner surface of the second case by being coupled to the fixing unit. The surface heater includes a film and a heating wire printed on the film.

Abstract: A memory device includes: a substrate; a bit line which is vertically oriented from the substrate; a plate line which is vertically oriented from the substrate; and a memory cell provided with a transistor and a capacitor that are positioned in a lateral arrangement between the bit line and the plate line, wherein the transistor includes: an active layer which is laterally oriented to be parallel to the substrate between the bit line and the capacitor; and a line-shaped lower word line and a line-shaped upper word line vertically stacked with the active layer therebetween and oriented to intersect with the active layer.

Abstract: A memory device includes: a first memory cell mat that includes first multi-layer level sub word lines positioned over a substrate; a second memory cell mat that is laterally spaced apart from the first memory cell mat and includes second multi-layer level sub word lines; a first sub word line driver circuit that is positioned underneath the first memory cell mat; and a second sub word line driver circuit that is positioned underneath the second memory cell mat, wherein the first sub word line driver circuit is positioned underneath ends of the first multi-layer level sub word lines, and the second sub word line driver circuit is positioned underneath ends of the second multi-layer level sub word lines.

Abstract: A method for preparing a zinc ferrite-based catalyst according to an embodiment of the present application comprises the steps of: contacting a metal precursor solution including a zinc precursor, a ferrite precursor, an acid solution and water with a basic aqueous solution to obtain a precipitate; and filtering and thereafter drying and calcining the precipitate, wherein the acid solution includes one or more of nitric acid (HNO3) and hydrocarbon acid.

Abstract: A social network service method implemented with a computer is provided which includes receiving at least one control condition for controlling an operation of a social network service from a user, generating a folder operated by the at least one control condition, associating at least one chatting element with the folder, and determining whether to control the operation of the social network service based on the at least one control condition, in response to a message from a conversation partner associated with the at least one chatting element.

Abstract: A method for manufacturing a catalyst for oxidative dehydrogenation reaction, a catalyst for oxidative dehydrogenation reaction, and a method for manufacturing butadiene using the same.

Abstract: A memory cell includes: a substrate; an active layer spaced apart from a surface of the substrate and extending in a direction which is parallel to the surface of the substrate; a bit line coupled to one side of the active layer and extending in a direction perpendicular to the surface of the substrate; a capacitor coupled to another side of the active layer and spaced apart from the surface of the substrate; and a word line vertically spaced apart from the active layer and extending in a direction intersecting with the active layer, wherein the word line includes a first notch-shaped sidewall and a second notch-shaped sidewall that face each other.

Abstract: A memory device includes: a first memory cell mat that includes first multi-layer level sub word lines positioned over a substrate; a second memory cell mat that is laterally spaced apart from the first memory cell mat and includes second multi-layer level sub word lines; a first sub word line driver circuit that is positioned underneath the first memory cell mat; and a second sub word line driver circuit that is positioned underneath the second memory cell mat, wherein the first sub word line driver circuit is positioned underneath ends of the first multi-layer level sub word lines, and the second sub word line driver circuit is positioned underneath ends of the second multi-layer level sub word lines.

Abstract: A method for preparing a zinc ferrite-based catalyst comprising: obtaining a precipitate by bringing a metal precursor solution including a zinc precursor, a ferrite precursor, a solution containing an acid and water into contact with a basic aqueous solution; filtering the precipitate; drying the filtered precipitate; and firing the dried precipitate, wherein the solution containing the acid includes one or more of nitric acid (HNO3) and hydrocarbon acid.

Abstract: A system-in-package module includes a substrate, an application specific integrated circuit (ASIC) chip on the substrate, first wafer level package (WLP) memories on the substrate spaced apart from the ASIC chip in a first direction parallel to an upper surface of the substrate, and second WLP memories on the substrate spaced apart from the ASIC chip in a direction opposite to the first direction.

Abstract: A memory cell includes: a substrate; an active layer spaced apart from a surface of the substrate and extending in a direction which is parallel to the surface of the substrate; a bit line coupled to one side of the active layer and extending in a direction perpendicular to the surface of the substrate; a capacitor coupled to another side of the active layer and spaced apart from the surface of the substrate; and a word line vertically spaced apart from the active layer and extending in a direction intersecting with the active layer, wherein the word line includes a first notch-shaped sidewall and a second notch-shaped sidewall that face each other.

Abstract: The catalyst for a hydrogenation reaction according to an exemplary embodiment of the present application comprises: a porous carrier; a catalytic component supported on the porous carrier; and a polymer provided on at least a part of the surfaces of the porous carrier and the catalytic component and comprising the repeating unit represented by Chemical Formula 1.

Abstract: The present specification relates to a method comprising: (A) mixing a ferrite-based catalyst molded article with diluent material particles; and (B) adding the mixture to a catalyst reactor, and a method for preparing butadiene using the same.

Abstract: A burner assembly includes a plurality of burner units including, on front sides thereof, fuel inlets through which fuel is introduced into the plurality of burner units, in which the plurality of burner units cause a combustion reaction using the introduced fuel, a case to which the plurality of burner units are coupled with a predetermined separation distance therebetween, and a flow passage guide that is coupled to a front side of the case and that includes a plurality of fuel openings corresponding to the fuel inlets of the plurality of burner units, and the flow passage guide is implemented as separate from the case.

Abstract: The present specification relates to a method comprising: (A) mixing a ferrite-based catalyst molded article with diluent material particles; and (B) adding the mixture to a catalyst reactor, and a method for preparing butadiene using the same.

Abstract: A social network service method implemented with a computer is provided which includes receiving at least one control condition for controlling an operation of a social network service from a user, generating a folder operated by the at least one control condition, associating at least one chatting element with the folder, and determining whether to control the operation of the social network service based on the at least one control condition, in response to a message from a conversation partner associated with the at least one chatting element.

Abstract: Provided is a catalyst for oxidative dehydrogenation, a method of preparing the catalyst, and a method of performing oxidative dehydrogenation using the catalyst. The catalyst for oxidative dehydrogenation has improved durability and fillability by including a porous support coated with a metal oxide (AB2O4) according to Equation 1: X wt %+Y wt %=100 wt %,??<Equation 1> wherein X is a content of AB2O4 and is 5 or more and less than 30, and Y is a content of the porous support and is more than 70 and 95 or less, wherein the metal oxide exhibits activity during oxidative dehydrogenation. Therefore, when the catalyst is used in oxidative dehydrogenation of butene, the conversion rate of butene and the selectivity and yield of butadiene may be greatly improved.

Abstract: A social network service method implemented with a computer is provided which includes receiving at least one control condition for controlling an operation of a social network service from a user, generating a folder operated by the at least one control condition, associating at least one chatting element with the folder, and determining whether to control the operation of the social network service based on the at least one control condition, in response to a message from a conversation partner associated with the at least one chatting element.