Assessment of the mobile risk sources is not yet established in the European Union by law and therefore there is not enough pressure to manage and reduce risks. However, the transport of dangerous goods poses a special risk in terms of the nature of the transported material, especially for densely populated urban areas. The release of toxic or flammable substances into the air may endanger the health and life of many inhabitants. The assessment of consequences of the mobile accident hazards has been dealt with only seldom and not in details. The aim of this paper is to assess the risks associated with the transport of dangerous flammable substance. Authors would like to point out that the mobile resources represent a significant source of risk through the transport of dangerous goods in the event of an emergency occurrence associated with their leakage.

Measures in connection with the COVID-19 crisis have forced a change in the processes taking place in individual organizations - whether in education, state administration or the commercial sphere. CEOs and full-time employees have been forced to ensure that the organization's goals are met in an ever-changing legislative environment, outside the standard work environment, with increased time pressure, in times of financial security concerns, and in times of heightened health or even life concerns. These factors have weakened concerns about one's own security - including the protection of one's own identity or the protection of the employer's assets in cyberspace. The presented research was attended by students, some of them, especially external students, are employees of the public or commercial sphere. The aim of the research was to find out whether students noticed an increased incidence of phishing attacks during the COVID-19 crisis, how they responded to this fact as individuals and how the organizations in which they are employed reacted. Based on the results of this survey, it can be estimated whether users with the development of Internet services are aware that they are an integral part of the cybersecurity system and, based on this fact, adjust their behavior in cyberspace.

Abstract. Consider a vehicle moving on a road whose usage over time creates an uneven surface on the road. Road unevenness that we encounter on surface communications often arises as a consequence of dynamical effects of moving vehicles, of weather changes, and due to road construction works. This article concerns with mathematical modeling of the trajectory of a road vehicle moving on such a surface during the course of road maintenance.

Traffic safety depends on vehicle quality, traffic density and road conditions. Motion of a vehicle on a road or bridge body is therefore interesting from many points of view for various experts. We draw our attention to the unevenness of the road, specifically to the road profile with the so-called standard obstacle. In the article we present several alternatives for the mathematical model of such a road and also the mathematical model of the trajectory of the vehicle while traversing this standard obstacle. The shape of the obstacle meets the requirement of continuous one-point contact of the tire with the road; it does not contain singular points, and thus provides conditions for safer driving, especially when transporting persons in critical condition, or shocks-sensitive or hazardous materials.

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