Proposal for an IIoT Device Solution According to Industry 4.0 Concept.

Today, Industrial Internet of Things (IIoT) devices are very often used to collect manufacturing process data. The integration of industrial data is increasingly being promoted by the Open Platform Communications United Architecture (OPC UA). However, available IIoT devices are limited by the features they provide; therefore, we decided to design an IIoT device taking advantage of the benefits arising from OPC UA. The design procedure was based on the creation of sequences of steps resulting in a workflow that was transformed into a finite state machine (FSM) model. The FSM model was transformed into an OPC UA object, which was implemented in the proposed IIoT. The OPC UA object makes it possible to monitor events and provide important information based on a client's criteria. The result was the design and implementation of an IIoT device that provides improved monitoring and data acquisition, enabling improved control of the manufacturing process.

Resistance of IoT Sensors against DDoS Attack in Smart Home Environment.

Smart devices along with sensors are gaining in popularity with the promise of making life easier for the owner. As the number of sensors in an Internet of Things (IoT) system grows, a question arises as to whether the transmission between the sensors and the IoT devices is reliable and whether the user receives alerts correctly and in a timely manner. Increased deployment of IoT devices with sensors increases possible safety risks. It is IoT devices that are often misused to create Distributed Denial of Service (DDoS) attacks, which is due to the weak security of IoT devices against misuse. The article looks at the issue from the opposite point of view, when the target of a DDoS attack are IoT devices in a smart home environment. The article examines how IoT devices and the entire smart home will behave if they become victims of a DDoS attack aimed at the smart home from the outside. The question of security was asked in terms of whether a legitimate user can continue to control and receive information from IoT sensors, which is available during normal operation of the smart home. The case study was done both from the point of view of the attack on the central units managing the IoT sensors directly, as well as on the smart-home personal assistant systems, with which the user can control the IoT sensors. The article presents experimental results for individual attacks performed in the case study and demonstrates the resistance of real IoT sensors against DDoS attack. The main novelty of the article is that the implementation of a personal assistant into the smart home environment increases the resistance of the user's communication with the sensors. This study is a pilot testing the selected sensor sample to show behavior of smart home under DDoS attack.

Trends in education during the pandemic: modern online technologies as a tool for the sustainability of university education in the field of media and communication studies.

The involuntary shutdown at universities during the COVID-19 pandemic and the impossibility of full-time teaching forced university teachers to look for other ways of communication strategies through Internet platforms with students and in everyday academic activities. The aim of this study is to reveal the attitudes and perception of university teachers in the field of Media and Communication Studies in Slovakia during two years of online home learning (2020 and 2021) when the first two waves of the COVID-19 pandemic took place. The aim was to show changes in the perception of the situation in terms of existing positives and negatives during this period as well as to point out a possible trend in the communication strategies used to ensure the sustainability of the education system. Due to the lockdown, the survey was only conducted in electronic format using online questionnaires. The participants were university teachers from the field of Media and Communication Studies. As this is a progressive field the study of which is carried out at the intersection of the interests of several scientific disciplines, it can be assumed that the conclusions can easily be transferred to social, economic, humanities and arts disciplines. When communicating and teaching students in 2020 and also in 2021, online teaching through systems such as Zoom or Google Meet and individual consultations by e-mail, chat and social networks dominated. As the results of the study indicate, modern online technologies contribute to the sustainability of the educational process during an emergency and will become an integral part of university education even after the end of the pandemic situation.