Volume 9, Issue 1, 2024.

IoT Protocols and Cybersecurity Threats

Gordana OSTOJIĆ, Stevan STANKOVSKI

Internet of Things (IoT) represents a heterogeneous network that can integrate different distributed devices. There are several IoT protocols that can be deployed like: MQTT, HTTP, CoAP, BLE and Zigbee. Each protocol has different security measures and vulnerabilities. Analysis shows that there is an increase in cyber attacks on IoT devices in all regions and industry sectors. The increase varies from 6% to 73% from the previous year. This trend is threatening and alarming, indicating the need for deep analysis when deciding what IoT protocol should be used in specific applications. The paper gives a review of IoT protocols analysing security measures and vulnerabilities of mostly used IoT protocols.

Welfare Quality Assessment for Simmental Cattle in the Future Framework of Blockchain

Denis KUČEVIĆ, Ksenija ČOBANOVIĆ, Tamara PAPOVIĆ , Srđan TEGELTIJA, Jelena MARJANOVIĆ, Stefan DEJANOVIĆ

Determining what consumers’ and producers’ needs are in terms of welfare awareness and potential management strategies to create new techniques based on modern technology to improve behavior, stress, and other welfare indicators monitoring them to verificate those welfare indicators in the supply chain for fattening cattle. This study examines how blockchain technology might be used to evaluate the welfare of Simmental cattle that are being fattened in a loose stall housing system. That could allow transparent and secure communication between farmers. In order to increase consumers’ reliance on farmers and the livestock industry, this study aimed to examine the viability of using blockchain as a tool to transmit accurate and unchangeable information about the welfare of food-producing animals. The characteristics given in the welfare evaluation procedure were utilized to evaluate the perceived value of each parameter in determining the welfare of Simmental cattle during fattening.

Influence of WAAM Technology Parameters on Properties of Structural Steel Walls

Katarina ILIC, Albert HAUCK, Ana BRDAR, Stanko SPASOJEVIC, Miroslav DRAMICANIN, Milan PECANAC, Petar JANJATOVIC, Mirjana TRIVKOVIC, Dragan RAJNOVIC, Sebastian BALOS, Leposava SIDJANIN

Wire Arc Additive Manufacturing (WAAM) is an innovative welding technology that combines Gas Metal Arc Welding (GMAW) and welding robot. The production process of WAAM is carried out by welding robots that are deposing layers of metal on top of each other. The presented research focuses on the influence of different welding parameters and deposition strategies of WAAM on the mechanical properties and microstructures. On the obtained samples in the form of walls, the following tests were carried out: visual and macro cross-section examination, tensile testing, impact energy testing, and bend testing. It was found that welding parameters, especially welding current and voltage have a significant effect on the porosity and mechanical properties and geometry of the material