Abstract: A technology related to a transmission device of an amplitude modulation method is disclosed. In the amplitude modulation transmission device, a transmission data signal transformed into a sinusoidal wave transition form is input to a signal input stage of a cascode power amplifier, and a transmission data signal transformed into another sinusoidal wave transition form is input to a bias power stage of the cascode power amplifier. The transmission data signal transformed into the sinusoidal wave transition form has a sinusoidal wave form in a section in which input data transitions and maintain its previous value in a section in which the input data is maintained.

Abstract: A positive electrode active material precursor includes Ni and Mn and secondary particles formed by the aggregation of a plurality of primary particles. The secondary particles have a ratio of a core area to a total area of the particles ranging from 28.7% to 34.1%, and a porosity ranging from 11.3% to 11.7%. Also provided is a method for preparing the positive electrode active material precursor. Additionally, a positive electrode active material including a reaction product of the positive electrode active material precursor and a lithium raw material is provided. Also provided is a method for preparing a positive electrode active material using the positive electrode active material precursor.

Abstract: The present invention relates to a method for manufacturing chemically recycled PET, the method comprising the steps of: supplying a dicarboxylic acid compound and a diol compound to a mixing container to obtain a dicarboxylic acid-diol slurry; supplying a BHET powder to a melting drum to obtain molten BHET; supplying the dicarboxylic acid-diol slurry and the molten BHET to a polymerization reactor to induce an esterification reaction; recovering residual ethylene glycol from the top stream of the polymerization reactor, and supplying the residual ethylene glycol to the mixing container.

Abstract: Disclosed are a system for drone calibration related to calibration that is required prior to flying a drone, and a method therefor. According to the present invention, there is an effect of improving the convenience of a calibration operation required for flying a drone, and in addition, when multiple drones have to be flying at the same time, there is an effect of allowing the drone to be easily calibrated without manually calibrating each of the multiple drones.

Abstract: A cleaning composition for removing post-etch or post-ash residues from a semiconductor substrate, and a cleaning method using the same are disclosed. The cleaning composition can comprise water; a fluorine compound; an alkanolamine compound; and a corrosion inhibitor. The corrosion inhibitor is a mixture of a first corrosion inhibitor and a second corrosion inhibitor. When using the cleaning composition, it is possible to efficiently remove the residues of various aspects existing on a surface of the substrate or the semiconductor device without damage to a substrate or a semiconductor device including various metal layers, insulating layers, etc. Accordingly, when a highly integrated and miniaturized semiconductor device is manufactured, it may be advantageously applied to the removal of residues generated on the surface of the substrate or the semiconductor device.

Abstract: Disclosed are a system for drone calibration related to calibration that is required prior to flying a drone, and a method therefor. According to the present invention, there is an effect of improving the convenience of a calibration operation required for flying a drone, and in addition, when multiple drones have to be flying at the same time, there is an effect of allowing the drown to be easily calibrated without manually calibrating each of the multiple drones.

Abstract: A cleaning composition for removing post-etch or post-ash residues from a semiconductor substrate, and a cleaning method using the same are disclosed. The cleaning composition can comprise water; a fluorine compound; an alkanolamine compound; and a corrosion inhibitor. The corrosion inhibitor is a mixture of a first corrosion inhibitor and a second corrosion inhibitor. When using the cleaning composition, it is possible to efficiently remove the residues of various aspects existing on a surface of the substrate or the semiconductor device without damage to a substrate or a semiconductor device including various metal layers, insulating layers, etc. Accordingly, when a highly integrated and miniaturized semiconductor device is manufactured, it may be advantageously applied to the removal of residues generated on the surface of the substrate or the semiconductor device.

Abstract: The present invention is related to an alcohol compound isolated from the extract of Cucurbitaceae family plant having anti-adipogenic and anti-obesity activity, and a composition comprising the same. The compound showed potent reducing activity of body weight, decreasing effect on the blood triglyceride and cholesterol level, activating activity of PPAR ? and preventing activity from the adipogenesis of precursor fat cells with no toxicity, therefore, those extract can be useful in treating or preventing obesity and adipogenesis-involved diseases as a medicine or health care food.

Abstract: The present invention is related to an alcohol compound isolated from the extract of Cucurbitaceae family plant having anti-adipogenic and anti-obesity activity, and a composition comprising the same. The compound showed potent reducing activity of body weight, decreasing effect on the blood triglyceride and cholesterol level, activating activity of PPAR ? and preventing activity from the adipogenesis of precursor fat cells with no toxicity, therefore, those extract can be useful in treating or preventing obesity and adipogenesis-involved diseases as a medicine or health care food.

Abstract: A novel tricyclodecanyl (meth)acrylate compound and a method of producing the same are provided. The compound is 8-alkyl-8-tricyclodecanyl (meth)acrylate represented by formula (1): wherein R1 is methyl or ethyl and R2 is hydrogen or methyl.

Abstract: A novel norbornene carboxylate compound and a method of producing the same are provided. The norbornene carboxylate compound is 2-alkyl-2-adamantyl 5-norbornene-2-carboxylate represented by formula (1): wherein R is methyl or ethyl.

Abstract: A novel norbornene carboxylate compound and a method of producing the same are provided. The norbornene carboxylate compound is 8-alkyl-8-tricyclodecanyl 5-norbornene-2-carboxylate represented by formula (1): ##STR1## wherein R is methyl or ethyl.