An airline is an organization that provides air transport services for travelling passengers and cargo.There are over 5500 airlines in the world with ICAO codes. Not all airlines are formed and work equally. Airlines have a different market positions and operating methods. But from some point of view, we can see the same obstacles and difficulties which all must face. We may look at the economic challenges, demand and world crises as a great example. The principal purpose of the presented article is to discuss briefly the dilemmas of airlines, particularly recent coronavirus pandemic. In our analysis, we looked at some breaking points in the recent history of aviation. The current state was analyzed in the first phase. We performed an overall review, and the available data were summarized as forecasts before and after the health crisis. The main part of discussion was extended by displaying various changes in airlines' operation during the pandemic. Many airlines were forced to change their strategy, reduced their flight capacity, cut the frequency of flights and put their planes into hibernation mode. These differences have significant outcomes as bankruptcies, financial and employee losses etc. However, the coronavirus has started slowing the spread and most airlines are restarting their operations.

Covid-19 pandemic influenced whole world and also airline industry. Air traffic was suspended for several weeks. The resumption of air traffic has been accompanied by a number of hygiene measures to prevent the further spread of the above-mentioned virus. We can also prevent the spread of the virus by reducing the number of passengers on board the aircraft. However, this restriction has a direct effect on the load factor and thus the profitability of the airline. In this article, we focus on recalculating different scenarios with regard to limiting the number of passengers on board of the aircraft at the same time and we have calculated the change in air transport prices with respect to costs and these limitations. The individual scenarios either copy the limitation of the number of passengers on board and thus the price is directly proportional to this reduction, or the individual scenarios work with limiting number of passengers on board but the price for transport is inversely increased so that the air carrier covers the cost of the flight. Results of these calculations shows margins between prices in different scenarios. Paper also proposes the best possible scenario for calculation of ticket price.

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Belt conveyors are used as efficient conveyance systems for the continuous transportation of materials. However, they are also used for a wide range of applications in the transport of ores and non-metallic materials. The Radio Frequency Identification (RFID) system represents a key technology in many industries due to its ability of automatic data processing. The purpose of the present article is to discuss the implementation of RFID tags into fabric conveyor belts as carriers of the information on conveyor belts (ozone-induced ageing or accelerated thermal ageing, damage to cover layers and the carcass, and ignition). During the monitoring, it is important to record conveyor belt failures and damage causes, as well as other problems arising during the use of belt conveyors. The article presents the results of the experimental research on RFID tags and the analysis of their behaviour in accelerated thermal ageing. This facilitates simulating the conditions of hot vulcanisation of conveyor belts, especially when splicing (as well as producing) them, and of ozone-induced ageing of conveyor belts. The output of the article is the verification of the possibility to implement the RFID technology in the transport of mineral materials by belt conveyance systems in real operations.

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