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A professional aviation meteorological service has been established in the territory of the Slovak Republic, the stations of which are unevenly distributed and do not cover the whole territory of Slovakia for information purposes. The addition of meteorological stations, whether mobile or installed at general aviation airports, would largely eliminate the occurrence of such "gray zones" without information coverage. Inexpensive meteorological stations installed at general aviation airports will help to solve the m...

The development of advanced analytics for data measured by SCADA systems is crucial from the viewpoint of process monitoring, management, and optimization. Many mining assets are characterized by cyclical operations performed with a fixed sequence of their course. An example is the Load Haul Dump (LHD) machine transporting material from the mining face to the dumping point, where the material is preloaded into a further means of transport - a conveyor belt. For wheel loader, the basic signal is pressure signal mea...

This article deals with the forming of sheet metal on a bending machine. The bending of sheet metal cut shapes or clippings is a very common operation in many companies. Oftentimes, many of these companies deal with the issue of how to bend the sheet metal to the required precision, especially while complying with the required bending angle. The sheet metal is bent correctly while it is in between the tools of the machine. However, stress develops in the material during bending and this stress remains in the mater...

Relevance of results and scope. Energy, which determines the progress of social production, continues to have an adverse impact on the environment. The result of any energy entity is to provide consumers with high-performance ecologically pure kind of energy that objectively defines influence of industrial activities of energy companies on the environment: emissions of pollutants into the atmospheric air, effluents of polluting substances in water objects, placing of production wastes, and also negative effects of...

In more than ten years of research in the field of carbon capture and storage (CCS) in Romania, several regions have been highlighted for their potential to contribute to the implementation of the technology in the country. Their delimitation has been made around large industrial stationary sources where promising storage and utilization options were available, considering favorable transport routes and small transport distances. The most promising and most studied regions for Romania are Oltenia and Galati. Olten...

P colonies (see [2]) are a well-established version of the P systems (see [3]), the computational device based on membrane computing. One branch of the research of the P-colonies focuses on the possibility to consider the two-dimensional environment, in which the agents act, and the 2D P colonies (see [1]) were introduced. 2D P colonies showed to be suitable for the simulations of various (not only) multi-agent systems, and natural phenomena, like the flash floods. The Grey wolf algorithm (see [4]) is the optimiza...

The ?Predicting a Pulsar Star? dataset has been investigated in this paper. The pulsars are special neutron stars emitting narrow beams of light with high energy into space. They rotate very rapidly and the signal repeats. Scientists seek periodic radio signals in order to detect these objects. Of course, frequency patterns vary from one star to another. The signal is averaged on a lot of rotations. At the same time a lot of pulsar candidates are just radio noise. There is a lot of objects to check. In this task m...

As a result of increasing concentrations of total nitrogen and total phosphorus, surface water chemical pollution and eutrophication is a problem of raising concern worldwide. Chemical quality of surface water gives an impression about different geochemical, geological, hydrological and biological processes, as well as intensity of anthropogenic load in river catchment area. The total length of Svete River is 123 kilometres, of which 75 kilometres are in the territory of Latvia. Main part of river?s drainage basin...

Transport is part of our lives. We live in an accelerated time and this also affects our transport demands. We need to move from one place to another faster. People often use own cars to move faster. The individual automobile transport has advantages. I tis flexible, fast and comfortable. But the automobile transport disadvantages. Many cars cause traffic jams, have a negative impact on the environment and the public roads are load. Individual car transport competes with public transport. In our country the public...

It was shown that organic agriculture in the Middle Ages resulted in significant changes of chemical and microbiological properties of soil of ancient agricultural fields and these changes have preserved up to now. Estimation of the changes in soil properties in result of centuries old intensive organic agriculture was made. As objects with intensive form of agriculture soils of agricultural terraces in submountain zone of North Caucasus (Russia) were chosen. Agricultural terraces are unique example of centuries o...

Samples of biodegradable composite material obtained by mixing a biodegradable polymer (PLA) as a matrix and chopped fine wood as a filler were developed. The filler in the samples was preliminary thermally modified at various temperatures. Composites were studied for biodegradation in alkaline solutions of NaOH and KOH. It was found that the biodegradability of pure PLA was significantly lower than that of composites based on PLA and a wood filler. In addition, the experiments revealed that by adjusting the degre...

The Dobsina dam is a part of the water management system ?Dobsina? which consists of the Palcmanska Masa reservoir, the Vlca Dolina hydroelectric power plant, and the Dobsina afterbay reservoir. Palcmanska Masa and Vlcia dolina dams were built in the years 1956 -1958, Dobsina dam in 1960. It is an earthfill dam, and the body of the dam is divided into the left and right part by a functional outlet block, which is situated in the valley alluvial plain. On the left side of the dam, the sealing was built of stabilize...

The analysis of development systems used in mining in coal pits of the permafrost zone is carried out. The intensive development of deposits over the past decades has led to large-scale landscape disturbances, the reasons for which are a significant increase in the scale of open pit mining, surface disruption by mining, dumps, technological sites, hydraulic structures, as well as environmental pollution for a long period. Attempts to reduce landscape disturbances using land-saving technologies, systematizing trans...

The efficiency of a mining enterprise depends on the quality and timeliness of management decisions. Despite the fairly high scientific, theoretical and practical levels of development of this scientific direction, the abundance of software products on the market, the issue of effective technological management remains very relevant and important. The analysis performed by the authors made it possible to establish that the weakest link in existing systems is to take into account the relationship between the parame...

This paper presents the results of a study of the hydrolysis of microcrystalline cellulose in a subcritical water medium. The influence of temperature, time, cellulose/water ratio, cellulose particle size, and other parameters on the hydrolysis process was studied. The influence on the process of pretreatment of aqueous dispersions of cellulose with ultrasound was studied. It was shown that the optimal processing time is 30 min (~ 150 kJ). Over a given period of time, destruction and partial hydrolysis of the amor...

The efficiency of teaching Earth Sciences to international students depends on many circumstances. In particular, it depends on the personal cultural and educational resources. All universities work on actualizing them, as the processes of educational systems internationalization are of great significance for all countries. International students have less cultural resources for completing university programs, if compared to local students, but the educational migration is increasing throughout the world. In 2018,...

The resource base of Ukraine has 60 deposits of iron ore with proven reserves. The quality assessment of these objects was carried out during their exploration several decades ago. Commodity products of domestic mining enterprises are various types of iron ore, concentrate, pellets, agglomerate. Mostly commodity concentrates have a total iron content of 64-65%. The best indicators (more than 67% of Fe total) are characteristic of certain types of concentrates of Central and Ingulets enterprises. The quality of com...

In the 1920 accrued one vehicle per one thousand inhabitants, in 1960 twenty cars per thousand inhabitants, and today it is 400 cars per 1000 inhabitants. The population and the numbers of vehicles increase causes a lot of economical and environmental problems, not only in Czech Republic but in the whole world. Today, parking is considered as a big problem for many reasons. The reasons are the numbers of inhabitants and numbers and size of vehicles increase, restricted parking spaces, traffic jams on roads, the lo...

Global event such as war, pandemic, political embargos affect overall economy of airline carrier by influencing the most important variables such as load factor or fuel prices. Aim of all companies is to be profitable, what means to cover all constant costs and fuel costs with profit from tickets which are closely linked with load factor. In this study we chose to study economic impact of COVID-19 pandemic and its effect on load factor and fuel prices and overall economy. To describe the problem, we chose yearly e...

This article is based on the results of studying the dynamics of long-term fluctuations in the flow of spring floods of the Don and Dnieper river basins in the territory of the Belgorod Region in the period 1968?2018. The object of the study are the maximum water discharges during the spring flood on the Tikhaya Sosna river near the town of Alekseevka (right tributary of the Don river) and Vorskla river near the village of Kozinka (left tributary of the Dnieper river). These rivers were chosen as objects of study ...

Biomass is the world's fourth largest source of energy after oil, coal and natural gas. Biomass is the largest and currently the most important renewable energy option and can be used to produce various forms of energy. As a result, biomass, together with other renewable energy options, is able to provide all the energy services needed in today's society, both locally and globally. Among many other aspects, the renew-ability and versatility of biomass as an energy source is also an important advantage. In addition...

At the present stage of development of the biotechnological industry, the most promising objects are enzymes of the oxidoreductase class, which are capable of catalyzing redox processes. One of the most studied enzymes of this class is horseradish root peroxidase. Its immobilization on various carriers allows the biocatalyst to be reused in various technological processes. In recent years, magnetic nanoparticles have been increasingly used as effective carriers of enzymes.In this work, we study the oxidation of 2,...

PVP-I (povidone-iodine) or Betadine, molecular iodine combined with poly-(1-vinyl-2-pyrrolidone), has been reported as antimicrobial agent. It is also as a promising chemopreventive agent against cancer. In this study the antiproliferative effect of PVP-I on rhabdomyosarcoma (RD) and other cancer cell lines (AGS, HeLa, HepG2, and MiaPaCa2) was examined. Cancer cells were treated with PVP-I and assessed for cell proliferation, metabolic activity, colony forming assay, apoptosis, and the fluorometric assay of the ce...

This article is devoted to the study and mathematical description of the mechanisms of oil pollution of objects of agro-industrial complex. The significance of the problem of ensuring the environmental safety of these objects through early detection, localization and prediction of the dynamics of the spread of oil pollution is shown. The basic properties of oil and oil products, as well as the features of their location and migration in the geological environment are considered. It was established that the migrati...

The landscape perceived as a physiographic complex is a theoretical concept adopted in some Eastern European countries and former USSR states. According to this notion, the landscape is a spatially defined fragment of the geographic sphere, a genetically uniform geo-ecosystem, having definite resource potential and transformed to a certain extent by humans. Pursuant to these ideas, the landscape comprises a mosaic of interlinked, hierarchically organized sub-systems, implying for taxonomic subordination of the phy...