Abstract: Provided is a nitrogen oxide removing denitrification catalyst having high durability against sulfur dioxide, a preparing method of the same, and a method for removing nitrogen oxide using the same. The denitrification catalyst is a quaternary denitrification catalyst containing vanadium-molybdenum-antimony-titania used in a selective catalytic reduction (SCR) reaction using an ammonia reductant to remove nitrogen oxides included in exhaust gases, antimony, molybdenum and vanadium are carried on a titania carrier, and molybdenum and vanadium are combined to be present in a form of a complex oxide (V2MoO8).

Abstract: Provided is a catalyst for a Fenton system, and a method of preparing the same. The catalyst includes one or more species of d0-orbital-based or non-d0-orbital-based catalyst including NO3?/SO42?/H2PO4?/HPO42?/PO43? functional groups on the surface thereof. The method includes preparing a d0-orbital-based or non-d0-orbital-based transition metal oxide; and preparing a transition metal oxide catalyst comprising a NO3?, SO42?, H2PO4?, HPO42?, or PO43? functional group on the surface of the catalyst via nitrification, sulfation, or phosphorylation of the transition metal oxide.

Abstract: A metal oxide catalyst synthesized using supercritical carbon dioxide extraction is provided, wherein the metal oxide catalyst includes an active site containing at least one type of metal oxide and a support for loading the active site and the metal oxide is an oxide of a metal selected from the group consisting of transition metals (atomic number 21 to 29, 39 to 47, 72 to 79, or 104 to 108), lanthanide (atomic number 57 to 71), post-transition metals (atomic number 13, 30 to 31, 48 to 50, 80 to 84, and 112), and metalloids (atomic number 14, 32 to 33, 51 to 52, and 85) in the periodic table, and a combination thereof.

Abstract: Provided are catalysts for reduction of nitrogen oxides including an active site including lanthanum vanadate represented by at least one of Formula 1 and Formula 2 and a support carrying the active site. LaVO4 (wherein LaVO4 is polymorphous and has a tetragonal or monoclinic crystal structure)??Formula 1 LaV3O9 (wherein LaV3O9 has a monoclinic crystal structure)??Formula 2.

Abstract: Provided are an apparatus and method for forgery prevention of digital information. The apparatus for forgery prevention of digital information includes: a digital information obtaining unit configured to obtain digital information in real time; a seed value generator configured to generate a seed value carrying characteristics of the digital information obtained using the digital information obtaining unit; an information piece generator configured to divide the digital information obtained using the digital information obtaining unit, into continuous information pieces with a sequence; and a hash value generator configured to generate a hash value of a first information piece from the seed value and the first information piece and generate a hash value of a subsequent information piece by using a hash value of a previous information piece and the subsequent information piece as inputs.

Abstract: Disclosed are an unmanned aerial vehicle (UAV) having a buoyancy apparatus and an attitude control method thereof, in which the buoyancy apparatus is coupled to the UAV to reduce the energy consumption of rotors such that the time of staying in the air is extended, enabling a long flight, and in which the buoyancy apparatus absorbs the impact energy and reduces the falling speed to thereby ensure sufficient safety for the UAV.

Abstract: Disclosed are a method of transmitting image data having a hybrid resolution and a method of generating a hybrid-resolution image. A main region of an original image is transmitted as a high-resolution image and the remaining regions are transmitted as a low-resolution background image. Accordingly, an amount of data to be transmitted is able to be reduced.

Abstract: A metal oxide catalyst synthesized using supercritical carbon dioxide extraction is provided, wherein the metal oxide catalyst includes an active site containing at least one type of metal oxide and a support for loading the active site and the metal oxide is an oxide of a metal selected from the group consisting of transition metals (atomic number 21 to 29, 39 to 47, 72 to 79, or 104 to 108), lanthanide (atomic number 57 to 71), post-transition metals (atomic number 13, 30 to 31, 48 to 50, 80 to 84, and 112), and metalloids (atomic number 14, 32 to 33, 51 to 52, and 85) in the periodic table, and a combination thereof.

Abstract: Provided is a nitrogen oxide (NOX) reduction catalyst including an active site including at least one of a metal vanadate expressed by [Chemical Formula 1] and a metal vanadate expressed by [Chemical Formula 2], and a support for loading the active site thereon. (M1)XV2OX+5??[Chemical Formula 1] (where M1 denotes one selected from among manganese (Mn), cobalt (Co), and nickel (Ni), and X denotes a real number having a value between 1 and 3.) (M2)YVO4??[Chemical Formula 2] (where M2 denotes one selected from among lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu), and Y denotes a real number having a value between 0.5 and 1.5).

Abstract: Provided are catalysts for reduction of nitrogen oxides including an active site including lanthanum vanadate represented by at least one of Formula 1 and Formula 2 and a support carrying the active site. LaVO4 (wherein LaVO4 is polymorphous and has a tetragonal or monoclinic crystal structure)??Formula 1 LaV3O9 (wherein LaV3O9 has a monoclinic crystal structure).

Abstract: Provided is a catalyst for a Fenton system, and a method of preparing the same. The catalyst includes one or more species of d0-orbital-based or non-d0-orbital-based catalyst including NO3?/SO42?/H2PO4?/HPO42?/PO43? functional groups on the surface thereof. The method includes preparing a d0-orbital-based or non-d0-orbital-based transition metal oxide; and preparing a transition metal oxide catalyst comprising a NO3?, SO42?, H2PO4?, HPO42?, or PO43? functional group on the surface of the catalyst via nitrification, sulfation, or phosphorylation of the transition metal oxide.

Abstract: Provided is a catalyst including: a support including titanium oxide; an active catalyst component including vanadium oxide; and a co-catalyst including antimony and cerium, in which the catalyst is included in a deNox reduction reaction that decomposes nitrogen oxide. The catalyst may improve sulfur poisoning tolerance characteristics while improving the deNox efficiency at a temperature in a wide range from low temperature to high temperature.

Abstract: A sound source separating apparatus may include: a housing; a plurality of microphones positioned on the housing; a plurality of sound guides positioned on the housing to be adjacent to the plurality of microphones, and configured to guide sound to the plurality of microphones and to generate a difference between a plurality of sound information respectively arriving at the plurality of microphones according to a direction of a sound source; and a processor configured to separate the sound source according to the direction of the sound source based on the plurality of sound information received by the plurality of microphones.

Abstract: Provided is a nitrogen oxide (NOX) reduction catalyst including an active site including at least one of a metal vanadate expressed by [Chemical Formula 1] and a metal vanadate expressed by [Chemical Formula 2], and a support for loading the active site thereon. (M1)XV2OX+5??[Chemical Formula 1] (where M1 denotes one selected from among manganese (Mn), cobalt (Co), and nickel (Ni), and X denotes a real number having a value between 1 and 3.) (M2)YVO4??[Chemical Formula 2] (where M2 denotes one selected from among lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu), and Y denotes a real number having a value between 0.5 and 1.5.

Abstract: Provided are an apparatus and method for forgery prevention of digital information. The apparatus for forgery prevention of digital information includes: a digital information obtaining unit configured to obtain digital information in real time; a seed value generator configured to generate a seed value carrying characteristics of the digital information obtained using the digital information obtaining unit; an information piece generator configured to divide the digital information obtained using the digital information obtaining unit, into continuous information pieces with a sequence; and a hash value generator configured to generate a hash value of a first information piece from the seed value and the first information piece and generate a hash value of a subsequent information piece by using a hash value of a previous information piece and the subsequent information piece as inputs.

Abstract: Provided is a catalyst for an electro-Fenton system. The catalyst includes one or more species of SO42?-functionalized transition metal oxide grains. Also provided is an electrode for an electro-Fenton system. The electrode includes the catalyst. Also provided is an electro-Fenton system that includes the catalyst, an electrode comprising the catalyst, and an aqueous electrolyte solution.

Abstract: A sound source separating apparatus may include: a housing; a plurality of microphones positioned on the housing; a plurality of sound guides positioned on the housing to be adjacent to the plurality of microphones, and configured to guide sound to the plurality of microphones and to generate a difference between a plurality of sound information respectively arriving at the plurality of microphones according to a direction of a sound source; and a processor configured to separate the sound source according to the direction of the sound source based on the plurality of sound information received by the plurality of microphones.

Abstract: Disclosed are an unmanned aerial vehicle (UAV) having a buoyancy apparatus and an attitude control method thereof, in which the buoyancy apparatus is coupled to the UAV to reduce the energy consumption of rotors such that the time of staying in the air is extended, enabling a long flight, and in which the buoyancy apparatus absorbs the impact energy and reduces the falling speed to thereby ensure sufficient safety for the UAV.

Abstract: The present invention provides for catalysts for selective catalytic reduction of nitrogen oxides. The catalysts comprise metal oxide supporters, vanadium, an active material, and antimony, a promoter that acts as a catalyst for reduction of nitrogen oxides, and at the same time, can promote higher sulfur poisoning resistance and low temperature catalytic activity. The amount of antimony of the catalysts is preferably 0.5-7 wt. %.

Abstract: The present invention provides for catalysts for selective catalytic reduction of nitrogen oxides. The catalysts comprise metal oxide supporters, vanadium, an active material, and antimony, a promoter that acts as a catalyst for reduction of nitrogen oxides, and at the same time, can promote higher sulfur poisoning resistance and low temperature catalytic activity. The amount of antimony of the catalysts is preferably 0.5-7 wt. %.