A blockchain-based data integrity multi-party high-efficiency audit mechanism (MBE-ADI) for the big data environment was proposed.A hybrid Merkle DAG structure based on data domain was built to organize data, and realized the simultaneous verification of a large number of unstructured data in the big data environment.In order to deal with the probl
Purpose.The purpose of the paper is: (1) the definition of perspectives development of Ukrainian railway tourism on the narrow gauge lines of Zakarpattia; 2) technical Hair Nets condition analysis of Borzhava narrow gauge railway for the project to restore the effective functioning of mountain railways track, width 750 mm in the Carpathian region,
Objectives: Although bioprosthetic valves have excellent hemodynamic properties and can eliminate the need Data Transfer Cables for lifelong anticoagulation therapy, these devices are associated with high rates of reoperation and limited durability.Although there are many distinct bioprosthesis designs, all bioprosthetic valves have historically fe