Перегляд за автором "Amer, Ayman"

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  • Зображення мініатюри
    Публікація
    Control System Development and Implementation of a CNC Laser Engraver for Environmental Use with Remote Imaging
    (Hindawi, 2022) Attar, Hani; Abu-Jassar, Amer Tahseen; Amer, Ayman; Lyashenko, V.; Yevsieiev, V.; Khosravi, Mohammad R.
    is article is aimed at studying the features of the control systems development for a small-sized Computer Numerical Control (CNC) portative laser engraver. e CNC is implemented in mobile maintenance and repair platforms for remote sensing of the environment where the wild environment may not allow us to access the animals and places. e proposed work in this paper is based on recent research, which shows that applying the automated CNC speeds up the processes of repair, modernizes the equipment size, and signi cantly reduces the economic costs; accordingly, the authors developed a block diagram of a portable CNC laser engraver. e choice of the hardware was also made, taking into account the possibility of quick replacement in the eld, which reduces the repair time and the cost of the developed layout. A control system based on the selected modules was synthesized, and a stability check was carried out using MatLab tools. To check the correctness of the developed control system, the authors developed and assembled an experimental layout to illustrate the results of engraving on such a layout. Finally, the stability and sensitivity of the proposed system have been obtained and proved that the system works in a comfortable zone of stability. e obtained results show that the proposed CNC laser engraver has achieved the expected improvements (high speed, small size, short production and repairing time, minimum human in uence factor, and achieving a better outcome).
  • Зображення мініатюри
    Публікація
    Electronic User Authentication Key for Access to HMI/SCADA via Unsecured Internet Networks
    (Hindawi, 2022) Abu-Jassar, Amer Tahseen; Attar, Hani; Yevsieiev, V.; Amer, Ayman; Demska, N.; Luhach, Ashish Kr.; Lyashenko, V.
    This paper discusses the development of new hardware and software for protecting access to HMI/SCADA systems via Unprotected Internet Networks (UPN), mainly when working remotely with confidential information. Based on the analysis carried out, it is shown that the existing vulnerabilities can be exploited by cybercriminals to steal passwords and user authentication logins. Modern protection technologies based on the OTP method have been investigated. Moreover, a new concept of information security for user authentication in UPNs when working with information remotely is proposed. The structure of the electronic key and the connection diagram based on the selected hardware modules have been developed. In addition, the two-level user identification algorithms and the firmware program code for the ATmega32U4 microcontroller are considered. Finally, to show the reliability and stability of the of the developed electronic user authentication key against any unexpected software hacking, a number of experiments have been performed.