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Modeling using artificial neural networks (ANNs) is used in most fields of production. An approach to modeling the dimensional changes in some iron-based powder metallurgy (PM) parts during the sintering process is given. The proposed model used is a multilayer neural network with a backpropagation learning algorithm. This type of neural network model gave the best results in the process of modeling. The specimens used in this study are prealloyed iron-based powders. The particle size of the powders is ranging fro...

The necessity for an integrated geographical approach to the study and modeling of ground-water dynamics in river floodplains is substantiated in the article. A preliminary and simplified classification of the types of annual ground and surface water level dynamics is proposed, which can serve as a basis for the differentiation of intrazonal floodplain landscapes. Thus differentiation is a scientific problem. In landscapes characterizing of the floodplains a descriptive approach prevails, and there are no quantita...

The article presents the methods of modeling two-phase flows. The widespread application of issues related to two-phase flows in industry encourages to familiarize with the methods of modeling this type of flows. The article presents basic mathematical models of two-phase liquid-solid flow on the example of sedimentation. In addition, numerical methods for simulating the sedimentation process are presented. Paper presents the possibility of using the Boltzmann method, the so-called Lattice-Boltzmann methods in mod...

Aquatic ecosystems of the Arctic are very sensitive to the climate change. Thermic processes inside and around water objects (lakes, rivers, wetlands) affected by endo- and exogenous factors and lead to talik formation and geoprocesses interaction and turnover. Hydrological and geophysical investigation in the Lena River delta have been carried out in spring and summer 2016-2018. Sublake and subriver taliks georadar and electrical resistivity tomography data were obtained in a field with following hydrological and...

The resistivity of reservoir rocks varies in radial direction from Rxo (resistivity of the flushed zone) to Rt (uninvaded zone resistivity). This variation is due to different content in mud filtration, formation water and hydrocarbons from the well wall to the uninvaded zone. The penetration of the mud filter in the collector and the change of the saturation states depend on the properties of the drilling fluid as well as on properties of the collector (porosity, permeability). Electric logs devices measure an ap...

As a participant of the UI Green Metric World University Ranking Network, the RUDN-University realized a complex of projects on sustainability and environment protection. Currently the university is on the 41th position in the ranking and is a national coordinator of this program in Russia. Among the main directions of the activities are the development of education on sustainability and environmental protection, resource and energy saving projects, research projects of different environmental and sustainability t...

The aim of this research was to determine the global horizontal irradiation (GHI) for Istria and Kvarner, two western regions in the Republic of Croatia with the GRASS GIS r.sun module and to compare it with the values of solar irradiation obtained from satellite images and ground measurements. Since the results obtained from the r.sun module have no quality control, the accuracy assessment was made on ground solar irradiation measurements obtained from Baseline Surface Radiation Network stations (BSRN). BSRN is a...

Air temperature influences a variety of environmental processes, having a significant impact on the conditions of living of humans and other life forms. The Brazilian Northeast is a region that comprises a diversity of ecosystems, but it is most known as a semi-arid area characterized by severe environmental conditions. This work proposes to model air temperature in Brazilian Northeast to evaluate changing patterns between 2000 and 2017 using two interpolation techniques and comparing them. Monthly average tempera...

In recent years there has been a renewed interest in utilitarian cycling due to its recognized potential in the reduction of energy consumption and pollution in the cities. BikeBike-sharing systems generate a large amount of data which can be used to improve the systems themselves, or to improve the body of knowledge on urban mobility. The open data automatically generated by the Brussel's bike bike-sharing system (Villo) is explored through spatial regression models of the number of bicycle trips at stations. The...

This article reveals main methodological approaches, which allow to construct the adequate mathematical models that describe the effective condition of the social, ecological and economic components of development of the object, system-enterprise, territory, country etc. from the perspective of synergetics. Main ideas of research about the complex socio-economic and ecological systems that are based on synergetic approach are formulated. Characteristics, factors of functioning of complex socioeconomic and ecologic...

Horizon control in underground coal mining is still largely based on the knowledge and experience of a human operator, while many other operations run fully automated in mines nowadays. Several control strategies have been developed for automatic horizon control in underground coal mines, but none of them worked satisfactorily for a long distance up to now, even if the used sensors execute their intended task already and were improved continuously. However, the behaviour of the mining system itself, especially the...

The research was carried out in Tata Valley watershed, Dambovita region, Romania, which is a tributary of the Ialomita river. The objectives of this study were to estimate the annual soil loss by applying remote sensing data and the main data for the Tata Valley watershed and obtain a spatial representation of the results using GIS techniques. The method used to determine the soil erosivity and total eroded soil quantity in Tata Valley watershed, is the RUSLE + GIS technique, adapted to the specific conditions of ...

Territorial risk analysis and assessment present current problem for optimization of these processes in regions, districts and municipalities. Threat scenarios need to be evaluated together with existing vulnerabilities in territory. From crisis management point of view, preparedness (protective measures) also need to be evaluated to form complete picture. Risk mapping allows its users represents possible approach for all these elements to be evaluated together at a same time. Vulnerability and risk mapping are us...

Autonomous passenger cars are becoming a trend today due to their role in saving human labour. However, in the field of earthmoving machinery, we can also witness a significant development in their autonomous operation. This paper deals with the possibility of using the autonomous operation of rollers and plate vibrators, intended for earth body compaction and the compaction of an upper asphalt road layer. In view of the growing share of automation and the associated computer applications for earthmoving machines,...

The regional features of the current condition of irrigated lands Zhambyl region were considered and an assessment of trends in their changes for the period from 2008 to 2017. An analysis of the technical condition of the irrigation network and the use of water resources was carried out for agricultural purposes. A regional dynamic analysis of irrigation water intake and its losses was carried out during transportation. The change of the structure of the sown areas of irrigated agricultural crops was determined de...

The characteristic of modern landscapes of the Kerch Peninsula as geologic systems in which natural and economic subsystems are inseparably connected is presented in the article. The component structure of the landscapes of the Kerch Peninsula (geological structure, relief, climate, water, soil, flora and fauna) was analysed using constructed thematic maps. The complex structure of the landscapes of the Peninsula is presented, with the indication of landscape levels, landscape zones, landscape areas. The descripti...

The conventional method of power generation is the main source of power today. With the changes in modern electronics, the uses of alternative power generation options become more and more viable. Series compensation has been successfully utilized for many years in electric power networks. With series compensation, it is possible to increase the transfer capability of existing power transmission systems at a lower investment cost and with a shorter installation time compared to the building of new, additional line...

Relevance of results. Experts note that growth of number of waste in Russia goes quicker, than GDP growth, so during the period from 2006 to 2012 the number of waste increased from 3, 5 billion tons to 5 billion tons. Constantly increasing volumes of waste cause need of elimination of their harmful effects on the environment. The main of the direction of the solution of this task is the organization of use, processing and also waste disposal. In this regard there is a problem of the choice of the most expedient de...

This study focuses on natural fiber nano-coatings - hemp and cotton modification and coating surface structure. For surface modification sol - gel technology is used. To predict the quality of the sols and the surface structure, the coatings were initially applied to different materials and tested with optical microscopy and atomic force microscopy. Samples were analyzed before and after washing as well as before modification with Fourier - transform infrared spectroscopy and energy-dispersive X-ray spectroscopy. ...

Oil prices have a decisive impact on the World?s economy. The cost of exploration and drilling of new oil fields is extremely high due to the fact that drilling works are more frequently performed in very difficult deposit conditions. On the other hand, a considerable number of already discovered and exploited fields entered a low production stage. This can be frequently helped with appropriate workover jobs in the well. For doing so, specialist workover fluids are injected to the wells. Most commonly these are in...

Corrosion represents a major problem in the flow assurance for the oil and gas industry. Carbon steel has been extensively used in oil and gas industry due to its cost-effectiveness, availability, strength, high durability and ductility. However, one of the biggest disadvantages of steel is highly susceptible to corrosion in the aggressive environments. Most of corrosion inhibitors are toxic, non-biodegradable and non-eco-friendly in nature, thus development of inhibitors based on natural resources are needed. In ...

The buildings sector currently consumes between 30% and 40% of the total energy produced in the developed countries while contributing over 35% of the total carbon emissions, most of them being built without taking into account passive strategies as well as the integration of renewable energy resources RRE. Given that the technology of solar energy is constantly increasing, adapting continuously to existing solutions is necessary. In this paper we approach the implementation of solar technologies, taking into acco...

There is old-established avowed demand of determination of ecologically proved limits of anthropogenic impact at natural ecosystems. Preservation of fresh waterbodies and streams ecosystems is very essential problem, because the fresh water more and more becomes one of the most important strategic resources. Of course, sea ecosystems are also needed in protection owing to their role in the biological resources maintenance. A monitoring system includes complex of different hardware and software, which must ensure f...

The Tatra National Park (TANAP) in Slovak republic is one of the oldest national parks in Central Europe and is also included in the NATURA 2000 system. Forest ecosystems in the Tatra National Park are made up of ecosystems, which include also the spruce-cranberry ecosystem and belong to the highest level of zonal protection, with the exclusion of any activity, including the fruit harvesting. In recent years, there has been a massive pressure from developers for tourism development in the area, new recreational fa...

Monitoring short temporal changes in intra-urban vegetation areas will become very important as the proportion of urban areas continue to increase. Intra-urban variations in vegetation abundance influence environmental conditions by selective reflection and absorption of solar radiation and by sequestration of pollutants. This research investigates the hypothesis that it should be possible to use easily accessible multispectral Landsat 8 images to track intra-urban vegetation, and obtaining sufficient quality info...

The paper deals with the monitoring of selected indicators of soil health and quality in order to assess the impact of farm using conventional farming on arable land. The main objective of the work was to find suitable indicators of the state of the soil environment, and to set the monitoring of these indicators to obtain information usable for the agronomics of the monitored enterprises when deciding on interventions on land. Every responsible farmer tries to care best for his land because only good and healthy l...

Water level, electrical conductivity, dissolved oxygen, oxidation-reduction potential and pH of Suceava River were monitored in 2018 and 2019 in order to assess the upstream-downstream evolution of these parameters and the impact of Suceava City on this river that divides its built area. The measurements were done automatically every hour with two AquaTROLL 500 instruments. This study focuses on analyzing distinct time intervals with typical and atypical fluctuations of the selected parameters as well as on identi...

The dams along with the accumulation lakes formed behind them are man-made water reservoirs for efficient use of the planet's water resources. The dams are big hydrotechnical structures in particular represents construction with very long duration of life and achieve their financial efforts imply particularly important. Over time, changes of external environmental factors may occur, which will influence the behavior of the dam. The environmentally aggressive conditions can be changed in relation to the material fr...

This paper discusses the preliminary results from the monitoring project of two contaminated sites (Predajna I and II) related to the former petrochemical industry (refinery) in the central Slovakia, and the waste generated by this industry. Waste product arising from this process are acid tars called ?gudron? in the Slovakian terminology. Due to the nature of deposited waste with a very variable composition (sulphuric acid, sulfonates, chlorides, mineral oils, etc.), both sites pose risk, or even potential threat...

Air pollution causes plant injury such as burning leaf margins or tips, delayed grown, root damage and premature leaf drop. An increased pollution also influences the leaf water content, the amount of chlorophyll in the plant and the ability to photosynthesize. In this study we have investigated four types of trees in six areas of Galati. Selected areas are scattered throughout the city and have different degrees of pollution. Samples were taken at regular intervals from the start burgeoning until maturity. The tr...

The article addresses the problem of such a common phenomenon as dysbacteriosis, according to medical experts in Kazakhstan, up to 90% of citizens are susceptible to disruption of the intestinal microflora. It was mainly influenced by the economic crisis of recent years, as well as environmental problems that adversely affected the nutritional structure of the population. One of the way to solve this issue is the use of probiotics, contributing to the normalization of the intestinal microflora to have a regulating...

Sediment transport in rivers is posing a hazard to infrastructures and cities built along the river courses, especially in mountain areas. Awareness about this topic raised in the last decade and even the European Flood Directive in 2007 stated that particular attention should be devoted to ?areas where floods with a high content of transported sediments and debris floods can occur?. Authors are monitoring sediment transport in a 24km2 basin in Alps, Northern Italy, since 2016. This stream was surveyed multiple ti...

One of the most important characteristics investigated during the obtaining of polymer nanofibers is the mean fiber diameter, which depends on the technological parameters of the electrospinning process. Polyvinyl chloride (PVC) nanofibres were obtained on the NANON-01A, Japan. The following technological parameters were used to obtain nanofibers: voltage is in the range 15 to 30 kV, a solution feed rate is in the range of 0.3 to 1.0 mL/h, a distance between the collector and the tip of the syringe is in range 7.5...

The connection between tectonic conditions of development and geomorphological features of the coast of Kherson region was analyzed in the relevant article. Geomorphological features of coastal zone were considered from the position of block structure of Karkinit-Sivash system of troughs. For the first time the attention was referred to the tectonic dependence of morphological and morphostructural features of coastal zone of research region. It was established that the mosaic of natural environment is typical feat...

Mud volcanoes occur both on land and oceans, but their occurrence is generally known on limited areas. Many of the European mud volcanoes structures are known from Romania, where their number exceeds 40. The most impressive and famous of the Romanian mud volcanoes are situated near the Buzau town, at Berca, in the Romanian Carpathian bend area. Other Romanian mud volcanoes are situated in the Transylvanian Basin and in the SW part of the country (Banat region). This paper presents the geological setting, including...

Environmental restrictions get every day more demanding; therefore, energy policies focus on reducing greenhouse gas emissions, setting clear targets relative to the renewable energy contribution in meeting electricity demand. Thus, the global tendency towards fossil fuel replacement by renewable energy sources (RES) is progressively sharpening. Sustainability of power systems with high renewable energy penetration rates is a topic of major interest, especially considering the intermittency of RES production and t...

Wine has always been a valued commodity, from ancient civilizations, up to current times, both from a quantitative point of view, and a qualitative one. Humans have been cultivating vineyards for thousands of years, with differential success. This has always been dependent on several, mostly natural factors. Even the most resilient varieties of grape vines require some specific conditions to optimally grow, such as climatic factors (including specific growing temperatures, precipitation, sun exposure, number of an...

The authors present the scientific grounding of a new theoretical concept of geo-exploration work, of geo-physical and geo-mechnical models for the unconventional technically recoverable hydrocarbon reserves of the Cis-Ural region. The paper describes heterogeneous balanced volumetric geo-mechanical model for the structural massif of mountain rock post-sedimentation in view of geo-physical synergy and petro-migration. The paper also provides a set of additional studies for seismic, tectono-physical, geological, ge...

An approach is proposed for the joint use of remote sensing and geo-informatics methods for monitoring the impact of wildfires on vegetation in distant northern territories of Russia without involving ground-based data. Detection of burned areas in high latitudes (north of 65 degrees N) was carried out based on the analysis of a long-term series of space data obtained from Terra/Aqua satellites (monthly collection product MCD64A1 Burned Area) and an annual product Global Forest Change Data 2000?2017 derived from L...

When preparing the field for industrial operation, it is necessary to build a conceptual model that reflects the internal structure of the objects under study. Conceptual modeling, in turn, is based on the methods of system analysis and interpretation of all available geological, geophysical and seismic information in the study area using various types of system analysis, which allows to predict changes in lithology and filtration-capacitive properties of rocks, as well as assess the reserves of the field. The con...

At the VSB-Technical University of Ostrava, Faculty of Safety Engineering, Department of Civil Protection in the field of Emergency Planning and Crisis Management, is taught the subject called Civil Emergency Preparedness at bachelor's degree program. Learning outcomes of the subject unit is focused on the management processes a assessments related to the preparation for extraordinary events and crisis situations in the Czech Republic. Special attention is paid to the issue of civil protection and safety of infras...

The increasing demand on the hardly accessible petroleum resources drives the E&P sector to find better solutions for the drilling and production systems. The drilling operation?s environmental impact is being more and more important where the role of drilling fluids is the key factor. The use of the nanotechnology promises new opportunities in both efficiency and environmental protection. Nano-additives can meaningfully affect the drilling fluid properties in small concentration help to their small particle sizes...

It is known that one of the methods for purifying gas fraction from hydrogen sulfide is amine treatment. Various types of amines are used to remove hydrogen sulphide, carbon dioxide and carbon dioxide from petroleum gases. The choice of specific amine depends on the needs of the process. Mono-ethanolamine (MEA) (C2H4OH) NH2 and diethanolamine (DEA) (C2H4OH) 2NH are commonly used. Both are ammonia derivatives. To develop recommendations on the choice of material from which to make equipment for amine plants, compar...

New ways in the field of extinguishing by solid extinguishing is aerosol fire fighting originally developed in the 1970s by the Russian space research agency called ?SOJUZ?. More significant development in the aerosol fire extinguishers usage occured in Europe in the 1990s. Carbon as basic element of organic compounds with two allotropic modifications can be found in various modifications like diamond and graphite. Fullerenes as the third modification was discovered in 1985. Detailed analytical researches have fou...

The process of mixed oxide coatings forming on a high-silicon aluminum alloy in the cobalt-containing pyrophosphate electrolyte by the plasma-electrolytic oxidizing (PEO) method is studied. It was shown that AL25 chemical composition heterogeneity causes the consumption of part of the anode current to homogenize the treated surface, which is reflected in minimizing the content of doping components at the initial processing stage. It was established the growth of mixed oxides Al2O3·CoxOy relative mass to be a funct...

Formation and development of the centralized national system of qualifications has become a burning issue in the Russian Federation. This is due to a number of essential reasons, which include globalization of the economy, specifying of universal competencies being in demand in the labor market, the existing gap between university curricula and professional standards requirements. The article aims at presenting a review of the relationship between the Russian national qualifications system, its evaluation of labor...

In general, analogues are examples that demonstrate one or more key aspects of some concept or technology that is being developed. By studying such analogues, we can improve our understanding of both the technical concept and its application - in this case, large-scale geological CO2 storage involving one or more Mt of CO2. Two main types of CO2 occurrence are found in nature: ?Accumulations that have remained in place for thousands to millions of years with noevidence of leakage (Ciocaia site); and ?Accumulations...

Natural gas hydrate are solid compounds formed from water (host) and gas molecules (guest) at relatively high pressure and low temperatures. They are considered as a potential alternative energy source because of their high energy density, potential carbon-neutral nature and wide existence, both in permafrost and ocean seabeds. The most developed strategies for exploiting hydrate deposits are depressurization, thermal stimulation, chemical inhibitors and CO2 replacement. In particular, chemical inhibitors promote ...

The author developed a thermoelectrical model of Solar system planets? magnetic fields and calculated Saturn?s magnetic field with its help. Radially directed thermoelectrical currents of the electroconductive layers of the planet are the essence of that model. The movement of those currents are determined by the intensity if the magnetic field, which is caused by the planetary thermogradient, e.g. the difference of temperature between the planet center and its outer shells of the electroconductive layers. The cal...

Central Anatolia is bounded by the Izmir Ankara Erzincan (IAE) Suture Zone dipping northward beneath the Pontides at the north and the Inner Tauride (IT) Suture Zone with NE-dipping Central part of Turkey with triangular shaped structure. The Paleozoic metamorphic rocks are formed the basement of the Central Anatolia and obducted by the remnant of Inner Tauride ophiolitic products. Both of the units injected by Late Cretaceous age of the felsic and mafic intrusive unit. The mafic products mainly composed of gabbro...