Abstract: Provided is a positive electrode active material which includes an inner region that is a region from the center of the positive electrode active material particle to R/2, and an outer region that is a region from R/2 to the surface of the positive electrode active material particle, wherein R is a distance from the center of the positive electrode active material particle to the surface thereof. The positive electrode active material further includes 25% to 80% of crystallites C with respect to a total number of crystallites in the outer region. The crystallites C have a high crystallite long-axis orientation degree of 0.5 to 1 and a low crystallite c-axis orientation degree less than 0.5. Thus, the positive electrode active material has high capacity characteristics and a small amount of gas generated.

Abstract: Provided is a positive electrode active material including a plurality of crystallites A, wherein the plurality of crystallites A has a crystallite long-axis orientation degree DoA represented by Equation 1 below is 0.5 to 1, and a crystallite c-axis orientation degree represented by a cross product value of a c-axis rotation vector Rc of a crystal lattice of a crystallite obtained by electron backscatter diffraction (EBSD) analysis and a position unit vector P? of the crystallite is 0.5 to 1. A proportion of the plurality of crystallites A is 25% to 80% with respect to a total number of crystallites in a cross-section of a positive electrode active material. Further provided is a positive electrode and a lithium secondary battery including the positive electrode active material.

Abstract: Discussed is an electrode tab disconnection inspection apparatus of a battery cell that can include an impedance measurement part connected to electrode leads of a battery cell to be inspected, and configured to measure an impedance value according to a frequency of the battery cell; and a determination part configured to compare impedance value data according to the frequency of the battery cell to be inspected acquired by the impedance measurement part and a predetermined impedance value data group according to a frequency of normal battery cells having no disconnected electrode tabs or a frequency of tab disconnected battery cells having disconnected electrode tabs to determine whether the electrode leads of the battery cell to be inspected is disconnected.

Abstract: Provided is a positive electrode active material which includes an inner region that is a region from the center of the positive electrode active material particle to R/2; and an outer region that is a region from R/2 to the surface of the positive electrode active material particle, wherein R is a distance from the center of the positive electrode active material particle to the surface thereof. The positive electrode active material further includes 30% to 80% of crystallites A with respect to a total number of crystallites in the outer region of the positive electrode active material, the crystallites A having high crystallite long-axis orientation degree and crystallite c-axis orientation degree. Thus, the positive electrode active material can achieve excellent capacity characteristics and service life characteristics.

Abstract: Provided herein is a resin-coated aluminum pipe connector for the outdoor unit of an air conditioner. The resin-coated aluminum pipe connector includes: a resin-coated refrigerant pipe made of aluminum, and configured such that an expanded portion is formed at one end thereof; a service valve including a connection port in which a first inclined surface is formed at an end of the connection port and a first screw portion is formed on the outer circumference of the connection port; a first compression ring configured such that an inclined surface is formed at one end of the inner circumference thereof and a first stop protrusion is formed at the other end of the inner circumference thereof; a second compression ring configured such that a second-first inclined surface is formed on the inside thereof and a receiving side wall extends upward from the second-first inclined surface; a sealing material; and a fastener.

Abstract: Disclosed herein is a resin-coated aluminum pipe connector for the outdoor unit of an air conditioner. The resin-coated aluminum pipe connector includes: a refrigerant pipe made of aluminum, and configured such that an expanded portion is formed at one end thereof; a service valve including a connection port in which a first inclined surface is formed at an end of the connection port and a first screw portion is formed on the outer circumference of the connection port; a first compression ring configured such that an inclined surface is formed at one end of the inner circumference thereof and a first stop protrusion is formed at the other end of the inner circumference thereof; a second compression ring configured such that a second-first inclined surface is formed on the inside thereof and a receiving side wall extends upward from the second-first inclined surface; a sealing material; and a fastener.

Abstract: Provided is a method for fastening a separation type tricycle in which a connecting pipe for connecting a front wheel part and a rear wheel part can be separated from and fastened to a head tube of the front wheel part, wherein the front wheel part and the rear wheel part are separated from each other by forming an ear-shaped groove, in which a handle bar can be put, in a right-side-open rectangular shaped plate fixed to the end of the connecting pipe so as to be used for attachment/detachment in a fastening device of the head tube, and then the end of a connecting bar for connecting the front wheel part and the rear wheel part is put on the handle bar by using the groove and another place is fixed thereto so as to set three wheels at the shortest distance therewith, thereby conveniently moving and storing the tricycle.

Abstract: The present invention relates to a coupling method for a separable bicycle, in which the front wheel and the rear wheel are easily separated from and coupled to each other such that the front and rear wheels are firmly coupled to each other even if the separable bicycle is operated for a long period of time.

Abstract: The present invention relates to a method and apparatus for solidifying radioactive waste accompanying chlorine recycling or radioactive iodine removal. The present invention provide a method and apparatus for treating radioactive waste composed of volatile metal halide with high corrosiveness at a high temperature through a solidifying system including crushing, mixing/dehalogenating and sintering. In the inventive method and apparatus for solidifying radioactive waste, a dechlorination process by using a dehalogenation material is performed on highly corrosive metal salt under an oxidizing atmosphere by using a method of controlling a temperature on the surface of a reactor, and solidification is carried out by removing radioactive iodine while reusing chlorine contained in an exhaust gas. Accordingly, the generated amount of total waste can be reduced, and therefore the inventive method and apparatus can be usefully used in preparing a solidified body with high durability.

Abstract: Disclosed herein is a method for preparing a ceramic waste form containing radioactive rare-earth and transuranic oxide, and the ceramic waste form with enhanced density, heat-stability, and leach resistance prepared by the same.

Abstract: The present invention relates to a coupling method for a separable bicycle, in which the front wheel and the rear wheel are easily separated from and coupled to each other such that the front and rear wheels are firmly coupled to each other even if the separable bicycle is operated for a long period of time.

Abstract: The present invention relates to a method and apparatus for solidifying radioactive waste accompanying chlorine recycling or radioactive iodine removal. The present invention provide a method and apparatus for treating radioactive waste composed of volatile metal halide with high corrosiveness at a high temperature through a solidifying system including crushing, mixing/dehalogenating and sintering. In the inventive method and apparatus for solidifying radioactive waste, a dechlorination process by using a dehalogenation material is performed on highly corrosive metal salt under an oxidizing atmosphere by using a method of controlling a temperature on the surface of a reactor, and solidification is carried out by removing radioactive iodine while reusing chlorine contained in an exhaust gas. Accordingly, the generated amount of total waste can be reduced, and therefore the inventive method and apparatus can be usefully used in preparing a solidified body with high durability.

Abstract: Disclosed herein is a method for preparing a ceramic waste form containing radioactive rare-earth and transuranic oxide, and the ceramic waste form with enhanced density, heat-stability, and leach resistance prepared by the same.

Abstract: A method of visually measuring the brightness of ambient lighting around a display device is disclosed. In this method, first, a reference brightness of the display device is determined according to a type of display device. Thereafter, information about locations where the display device is used is received from the user, and illuminance values of the display device corresponding to brightness stages are set based on the reference brightness and the location information. Then, a reference brightness is converted into each of the illuminance values corresponding to each of the brightness stages. The converted images with the illumination values corresponding to the brightness stages are displayed to the user, and an image that has a brightness value nearest to the brightness of ambient lighting is selected, and the brightness value of the selected image is determined as the brightness of ambient lighting.

Abstract: A method of visually measuring the brightness of ambient lighting around a display device is disclosed. In this method, first, a reference brightness of the display device is determined according to a type of display device. Thereafter, information about locations where the display device is used is received from the user, and illuminance values of the display device corresponding to brightness stages are set based on the reference brightness and the location information. Then, a reference brightness is converted into each of the illuminance values corresponding to each of the brightness stages. The converted images with the illumination values corresponding to the brightness stages are displayed to the user, and an image that has a brightness value nearest to the brightness of ambient lighting is selected, and the brightness value of the selected image is determined as the brightness of ambient lighting.