International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Cybersecurity is one of the most commented areas in IT nowadays. Plenty of network and application attacks are possessed worldwide. Security becomes serious issue for corporations and governmental computer networks as functionality of applications rises in technological aspect. Most affective and widely used network attacks and application vulnerabilities are commented in this reviewing paper. Primary solutions for network security are proposed.

The survey of the digital image quality appears to pass through a man’s perception. This leads to a one’s own personal decision. To bring tests on the quality of video information, methods for digital image processing analyses are utilized. Correlation between subjective and objective assessment is explored in this paper. A special video sequences are projected and the subjective influence is compared with a well-founded image quality metrics.

Cellular radio communications operate in a severe radio environment. Multipath propagation, inter-channel, inter-symbol and Multiple Access interference, frequency selective fading and many others, contribute to system performance degradation. Contemporary techniques, such as zero-forcing equalization and sophisticated signal filtering, are used for interference cancellation. To observe the system performance, BER analysis is made in this paper.