Abstract: The present invention relates to an apparatus for classifying radioactive waste and a system for classifying nuclear facility dismantlement waste, wherein the system comprises the apparatus. The apparatus for classifying radioactive waste may comprise: a first inspection module provided to measure whether the radiation emitted by an inspection target is less than or equal to a predetermined first reference amount while the inspection target moves along a first direction perpendicular to the up/down direction; and a second inspection module provided to re-examine the inspection target when the radiation emitted by the inspection target and measured by the first inspection module is less than or equal to the first reference amount, and measure whether the radiation emitted by the inspection target is equal to or less than a second reference amount smaller than the first reference amount.

Abstract: A traffic management method based on a blockchain network includes: collecting, by a user terminal, vehicle driving information; receiving, by the user terminal, block 5 generation permission information from a server; and generating, by the user terminal, a driving information block by using the block generation permission information and the vehicle driving information, and storing, by the user terminal, the driving information block in a blockchain 10 network.

Abstract: Digital watermarking of digital audio is performed by Fourier transforming digital audio data, wavelet transforming the magnitude components of the Fourier transform coefficients of the digital audio data, discrete cosine transforming a watermark signal, multiplying the sign of the wavelet transform coefficients of the magnitude components to the coefficients of the discrete cosine transformed watermark signal, adding the coefficients of the Fourier transformed digital audio data and the adjusted discrete cosine transformed watermark signal, and inverse wavelet transforming the audio signal's coefficients before inverse Fourier transformation to finally generate watermark-embedded audio signal data.