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Yuriy V. Erokhin,Kirill S. Ivanov 한국지질과학협의회 2019 Geosciences Journal Vol.23 No.2
This paper describes the discovery of the first solid bitumen in the plagiorhyolites of Sinara River (Kataysky District, Kurgan Oblast), which are part of the Early Triassic Turin volcanic-sedimentary series on the border of the Ural and Western Siberia. According to data provided by complex analytical studies, they were classified as low anthraxolites. It was found that the formation of solid bitumen in acidic volcanic rocks of Sinara River occurred during the late stage of establishment of the plagiorhyolite body during the formation of chalcedonic (agate) amygdales and secretions. Solidification and sedimentation of anthraxolite from hydrothermal solutions apparently took place under a radical prevalence of the carbonate ion, i.e., in the amygdales during the crystallization of calcite, while in the edge zones of brecciation of plagiorhyolite – of another carbonate, siderite. The source of the substance for the formation of anthraxolite in plagiorhyolites of Sinara River could be both the enclosing sedimentary rocks and deep (mantle) carbohydrate fluids.
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Crypto coding system based on the turbo codes with secret keys
Kovtun Viacheslav,Ivanov Yuriy 한국통신학회 2024 ICT Express Vol.10 No.2
In 1997, the US National Science Foundation recognized the need to unite research communities together to solve mutual problems, overcome challenges, future development and practical applications of cryptography and error correction coding. Recent works in this area are connected with turbo codes, which have a special ability to provide error correction characteristics of the information transmission close to theoretically obtained values. Besides, they are used for television (DVB-RCS, DVB-RCT), wireless local networks (WiMAX), software-defined radio systems, mobile (3G, 4G, Inmarsat) and space (CCSDS) communications etc. In this article is presented the crypto coding system based on turbo codes with secret keys used by interleavers. All calculations are performed during data encoding, which reduces the computational complexity of data pre-encryption. The necessary mathematical apparatus was presented, the security level of the communication system was estimated, a simulation of the error correction characteristics was performed, and multimedia information was processed. The working characteristics of the classical and proposed turbo codecs do not differ statistically. The results can be used in communication systems for various functional purposes.
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