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In remote, hard-to-reach areas, renewable energy resources such as the sun or wind are available and can be used to produce green electricity at competitive prices. The disadvantage is that we do not always have the source of energy available (sun at night or continuous wind). This disadvantage can be overcome by using hybrid combinations of two or more renewable energy sources together with the storage of the energy produced, thus ensuring the supply of electricity at very good performance levels and with low cos...

This work studied the problem of the joint use of Gauss - Laplace and B (beta) distributions to describe the disintegration of minerals of polymineral ores, which is associated with the liberation of mineral grains - the release of monomineral particles from intergrowths with other minerals. The basic position of the work is the dependence of the result of reducing the size of mineral particles on the energy expended on this process, postulated in the mineral processing theory. This dependence was taken into accou...

In today's world, shopping represents a significant part of everyone's life. The interaction between the customer and store staff has grown to be more critical than ever. To facilitate a pleasant and engaging shopping experience, we acknowledge a market gap and a real competition for developing innovative tools that can be used by both parties: the customers, which need their requirements fulfilled, and the store staff, that can use these tools to satisfy customers' needs further by targeting the correct audience....

To date, there is an increase in the incidence of skin and subcutaneous tissue diseases, despite the variety of treatment methods. One of the promising class of biomaterials for the treatment of skin diseases can be coatings based on hydrogels. The purpose of this study was to obtain collagen-acrylic hydrogels with various technological parameters (varying the synthesis temperature and the degree of neutralization of acrylic acid) with the specified properties by radical polymerization. The chemical structure of t...

A ventilation system is defined by performing air exchanges between the indoor and outdoor environment with the purpose of creating environmental conditions as close to the required thermal comfort conditions. Before installing a fan, it is necessary to analyze the space in which it is to be used and the method of compensating the exhaust air (mechanically with another fan or naturally with dimensioned grids). The most important factors to consider when choosing a fan are: the volume of the space, the number of sh...

The paper presents the results of research on the radiation balance of coniferous forest ecosystems in the mountain Crimea. Based on open reanalysis databases and the geoinformational modeling results, the elements values of the radiation balance of coniferous forest ecosystems located in different landscape zones and levels are calculated. It is found that for the period from 1983 to 2013 the values of the radiation balance of the mountain Crimea coniferous forest ecosystems vary from 1641.8 to 1836.4 MJ/m2?year....

When developing oil fields, water flooding is often used to displace oil. In this case, effective oil production is possible with a detailed study of hydrodynamics in the reservoir. Recently, organic phosphors have been used for these purposes, which are pumped into the formation through injection wells. The spectral characteristics of the excitation (absorption) and luminescence of produced water with phosphors can provide information on the hydrodynamic relationship between injection and producing wells and the ...

The Auto-Regressive Integrated Moving Average (ARIMA) model is widely used to forecast non-stationary time series data. In a model of ARIMA (p, d, q), AR is autoregressive, p is the number of regression terms, MA is the moving average, q is the number of moving average terms, and d is the difference time to make the data a stationary series. It can be used to forecast the trend of geomagnetic disturbances. Firstly, the non-stationary historical data xt is processed by the d difference to develop the stable histori...

Waste disposal and management is one of the urgent issues faced by mankind at the current stage of development. Waste car tires pose a significant threat to the environment, which makes their efficient processing particularly important, as the volume of this type of waste generated each year worldwide is estimated at more than 10 million tons, of which 1 million tons are produced in Russia. A review of the car tire, wood, textile, and plastic pyrolysis products is presented. The products of pyrolysis include pyrol...

In this work, the physical parameters of near Earth objects (NEO) are studied. The search for parent bodies of low-activity small meteor showers ? k-Cygnids, ?-Cancrids, and Virginids are performed among asteroids that could be faded comets. For k-Cygnids by all the catalogues of meteor orbits 2 asteroids are selected ? 153311 2001MG1, 385343 2002LV, whose orbits provide from 90% to 100% compliance with meteoroids? orbits of a shower. The 2012LL9 is only selected by 3 catalogues of meteor orbits. By catalogue of A...

This study is devoted to studying the properties of a new polymer sorbent based on polyvinyl alcohol and carboxymethylcellulose using infrared spectroscopy and thermogravimetric analysis. The influence of calcium chloride on the performance characteristics of the sorbent, such as oil capacity, floatation, moisture content and polymer degradation, is studied. The cross-linked matrix has improved properties: increasing the oil capacity and flotation time, retention of the structure when the sorbent is on the water s...

The paper presents the results of mineralogical and technological research of tailings produced during processing of rare-metal columbite ore of the prospective Zashikhinskoe deposit. The grain size analysis of a tailings sample showed that the most part of the material is represented by fine-grained particles with 53.3% yield of size fraction -0.045 mm. Mineral composition of the tailings is mainly represented by quartz, albite and microcline. Total content of minor minerals, such as muscovite, columbite, cryolit...

This paper proves news about the argillized (bentonitized) deposits that are part of a complex distribution of volcanic rock types occurring in the Gurasada region. These are the oldest deposits of volcanic origin crops out in the Gurasada open pit. Above these are volcanic deposits of andesitic composition represented by pyroclastic breccias, rare tuff levels and lava flows. The site observations, petrographic, XRD, RAMAN spectroscopy and chemical analyses indicated the formation of the bentonite deposit by weath...

Currently, particular attention is paid to the study of connection between geophysical phenomena and technogenic processes. At the same time, the structural parameters of the Earth?s internal structure and its core, change in natural characteristics of water basins as well as dynamics of oil and gas deposits are being investigated. This paper describes a new method for studying geophysical phenomena depending on the state of large water basins. With this purpose, we conducted a correlation analysis between astrome...

Conveyor belts are used for a long period of time in the industry branches where potentially explosive atmospheres could occur. The use of conveyor belts in industrial spaces with danger of explosive atmospheres, implies fulfilling by these of certain safety requirements, in order to prevent the ignition sources of explosive atmospheres. The need to provide the highest level of protection in the industrial spaces with danger of explosive atmospheres led, on the one hand, to the use of conveyor belts with adequate ...

Urban noise is affecting an increasing number of people and this is why it is becoming a major environmental issue, being a known fact that it affects all human activities and constitutes a stress factor with negative effects on health. It can affect the population both physiologically and psychologically, having an influence on the elementary activities such as sleep, rest, study and communication. Noise in the environment - a harmful and unwanted sound from the outside - is spreading, both in duration and in geo...

The aim of the work is to create methodological provisions to justify the safe parameters of the thermal regime in permafrost rocks during the construction of underground complexes of small power nuclear plants in the Arctic region. The idea of the study is to assess the thermal regime of long-span mining excavations using mathematical modeling methods. To ensure the stability of underground mine excavations at the construction stage in the permafrost, the authors verify the use of various heat-protective systems....

We analyze the micro-seismic noise recorded at five seismic stations ? DEC, DJJ, FMP, MWC and RPV. They operate within CI: Southern California Seismic Network (SCSN), USA. The data set is collected from 01 July 2018 till 31 July 2019 and all seismic events with a magnitude Mw?4 are excluded. Our main goal is to find the effects of seismic noise synchronization between different seismic stations using data relevant to the vertical seismic components. The width of the multifractal spectrum, the spectral exponent and...

The research of 2D carbon-based nanomaterials has become very intensive since the discovery of graphene. Many different preparation procedures of graphene and graphene derivatives have been reported. The aim of this paper was to prepare and characterize partially oxidized graphite oxides, which were prepared from nanographite by adding different amounts of potassium permanganate as an oxidizing agent. The C/O ratio was evaluated from X-ray photoelectron spectroscopy, energy dispersive spectroscopy, and elemental a...

Greenhouse gas emissions are high among global environmental issues, which is also true for Russia. Based on an analysis of government reports on the state and environmental protection of the Russian Federation and on the state and use of the subsoil of the Russian Federation, it has been established that over the past five years at least 70% of greenhouse gas emissions in Russia account for the fuel and energy complex. Significant reductions in the emissions of these gases in industry are very problematic due to ...

The article focuses on studying new Baltic amber processing technologies. This topic is relevant primarily for regions where amber is being mined commercially, including for the Kaliningrad region of Russia, where the largest industrial amber deposit in the world is located, developed by one enterprise ? the Kaliningrad Amber Factory. Having a specific production structure with a large share of amber for pressing and amber for chemical processing against the background of increasing amber production, the Kaliningr...

The article presents methodological approaches to the improvement of the environmental monitoring system. To increase the objectivity and to improve the visual aspects of data presentation during ecological monitoring, the authors proposed to involve remote sensing methods of the Earth and geoinformation technologies. The presented set of methods is effectively used for general, operational and background monitoring. The authors have developed an algorithm for monitoring the state of ecosystem components by remote...

Increasing in air temperatures, changes in the precipitation pattern and increased frequency of extreme weather events represent the main characteristics of climate changes in Serbia. Climate changes, according to their characteristics, affect the society, the various sectors of economy and the natural environment. Based on the direct dependence of agricultural production on the climate state, and therefore on climate changes, the agricultural sector represents the most vulnerable sector of economy. In order to de...

This work aims at the creation of digital selenographic satellite maps (DSSM) using fractal geometry and multi-parameter harmonic analysis. The observational data for DSSM were produced by the ?Clementine?, ?Kaguya? and ?LRO? space missions. An electronic database on altimetry measurements was built and they were brought into the single reference system by robust modeling. Based on the produced data and the method of multi-parameter harmonic analysis, we developed a digital selenographic satellite map covering the...

This work focuses on the creation of a selenocentric satellite simulation navigation system (SSSNS) using a set of reference objects on the lunar surface. The latter is based on the data from the modern space missions ?LRO?, ?Clementine?, ?GRAIL? (all ? NASA, USA), ?SELENE? (JAXA, Japan), and ?SMART-1? (European Space Agency). The SSSNS was created to transform measurements taken from in-orbit satellite into the selenocentric inertial reference system. The measurements should be taken by on-board altimeter and las...

Agriculture and all areas that contribute to its development are key to achieving significant and lasting progress towards ridding millions of people of poverty and hunger. Tasks related to solving the problem of hunger, food insecurity and malnutrition in all its forms lie at the heart of the leading goal in the field of Sustainable Development of the World for the period up to 2030, including: ensuring universal access to safe, nutritious and sufficient in volume food, and the elimination of all forms of malnutr...

This work focused on study fractal structures on Venus is performed on the basis of observations taken by the ?Magellan? spacecraft (NASA). The equipment of this artificial satellite allowed scanning almost the entire surface of Venus using a radar with synthesized aperture of S-band (12 cm) and a microwave radiometer as well as investigating topography by the special radar ? altimeter. The uncertainties in some data produced by ?Magellan? were filled by the information that had been collected before ? in ?Venera ...

Effective operation within the company and swift decision-making are not possible without an organizational structure in line with an appropriate strategy, or without an approved division of power and job descriptions, i.e. without a professional formal regulatory system. However, in addition to officially accepted standards, there is always a kind of a set of rules for normative behavior in the organization, which arises as an alternative to the formality - informal relationships. In circumstances when the employ...

In the 21st century, the competitive advantage of many successful companies is great employees who work remotely. However, so far this has not been a common practice in companies in Latvia. Today, remote collaboration is a reality and often an economic asset provided by the World Wide Web. However, business leaders often are indecisive between remote and onsite teams to performing a given task. The events that started in the beginning of 2020 showed an extraordinary transition from onsite work to working remotely,...

One of the greatest challenges in restoring the urban landscapes consists in getting data as accurate as possible on the historically evolving landscape. This case study of the historical ensemble of Ciacova, Timi? County in Romania, presents the methods for interpreting data from particular historical and archaeological research that contributed to establishing the principles for the restoration of the ensemble. On the one hand, the research provides the necessary data for the restoration process, on the other ha...

The use of renewable energy sources as an alternative to fossil fuels is increasingly present worldwide. In this context, Romania has committed to increasing the share of solar energy at the national level. This is in line with the European Union's concerns about energy efficiency. The lowland and low hills of the southern and south-eastern parts of the country are the most suitable for such an approach. So is the south part of Prahova county, mainly in the plain unit, which occupies the southern third. Prahova Co...

The identification of the landslide preparation and development mechanisms is the key to the sustainable development of landslide and landslide-prone urban and mining areas. The understanding of the landslide preparation mechanism is necessary for landslide hazard and risk assessments and designing proper protection measures and monitoring. A new equation for calculation of a slip surface depth (of a landslide basis) was obtained, using slope morphological and soil strength parameters. A new elaborated approach fo...

The precise point positioning (PPP) method is a relatively young method of GNSS observations processing but it is already quite widespread in many cases. However, the processing of observations with this method using specialized software requires some experience and competencies. The advent of web services for processing the results of observations using the PPP method significantly simplified this task. This circumstance is especially important for workers in the cadastral sphere, and makes it possible to simplif...

Both surface but especially underground rescue activities in industrial environments presenting risk of explosive / flammable or toxic gases, are difficult because of major risk of fires or explosions in a very short time. Dense smoke can make rescue work even more difficult and time becomes an extremely important factor, especially when workers are caught in the affected area and it is assumed that they could be alive. The technological development of last years has allowed the miniaturization of equipment and oc...

This work focuses on the use of projective geometry methods to determine star positions produced on the basis of positional observations. As is known, projective geometry studies invariant projective transformations. The main feature of projective geometry is the principle of duality, which adds elegant symmetry to many designs. While the properties of the figures that Euclidean geometry deals with are metric, but there are figures that can be converted into one another by movement while maintaining the metric pro...

The structure of the Romanian Western Black Sea shelf has been studied before 1970 and described in publications that serve today as an important point of reference in the structural geology and geotectonic studies. After the year 2005, a new set of gravimetric data has been acquired by the Romanian National Institute of Marine Geology and Geoecology, that has been obtained by compiling over 13.400 km of profile measurements on the Romanian and Bulgarian offshore. By combining this newer data with an analysis on t...

Thermal dehydration of a natural hydrous ferric sulfate Fe(SO4)(OH)?2H2O was studied using x-ray-phase and thermal analyses. This mineral was found in the hypergenesis zone of the Khangalas gold deposit, Eastern Yakutia, Russia. A comparative analysis of the sample with known hypergenic hydrous ferric sulfates with a similar Fe2O3:SO3 ratio close to 1:1 was performed. The dissimilarities between the founded mineral and its possible polymorphs ? butlerite and parabutlerite are identified. The mineral is less stable...

In the current global context where we talk about the depletion of conventional fuel resources and their impact on the environment, we find that it is necessary to integrate renewable energy sources/resources in new constructions, but also adapt existing constructions in order to reduce energy consumption. This article presents a system with solar thermal collectors combined with PCM phase change materials. During operation, some of that thermal energy may be diverted to a storage system where it is maintained for...

The greatest destruction of the soil cover and natural landscapes occurs during the development of the field by open pit mining. As a result of the development of the field, a complete change in the relief occurs, disruption of water and air balances, which leads to disruption of the ecosystem as a whole. To stabilize the state of the environment, it is necessary to implement a set of environmental, economic and social measures to restore environmental components. In this case, it is necessary to take into account...

During a mine exploitation, the activity of the mine shafts must be carried out under outstanding safety conditions, given that through them we carry out the transport of personnel and materials necessary for the production process and we extract mineral substances. For these reasons, the operating parameters must be within the limits provided by specific regulations, both in the case of supporting and guiding elements of the shaft, as well as those of the extraction plant. The labor protection regulations provide...

The article analyses the current state of flood protection of the urban area in the foothill region. Problems of the area were characterized through selected critical points that support the local flood origination. Of course, the flood is a random phenomenon and its behaviour depends on many other factors, such as soil saturation, vegetation cover, river bed channel current state, as well as drainage cuts, soil management, etc. For efficient design of the flood protection measures, it is necessary to have input d...

The UNESCO Convention on the Protection of the Underwater Cultural Heritage, adopted on 2 November 2001 is an international treaty aims to saving the underwater cultural heritage. Romania have joined the UNESCO Convention on the protection of the underwater cultural heritage in July 2007. The Western Black Sea shelf has been defined entirely as an archaeological site. Based on complex geological, sedimentological, stratigraphic studies and determinations of absolute age [2, 6] it was argued the existence of a cycl...

The aim of the study is to give the evidence that the formation of students' cognitive initiative as a part of integrative personality development by means of a foreign language becomes a defining factor in training a competitive specialist. A sufficiently high level of mental development, a strong memory, having the logic for reasoning, broadening one's horizons, working capacity, perseverance, etc. ? all these contribute to student?s success. However, even with all of these qualities, it is necessary to constant...

The article considers the issues of evaluating the quality and effectiveness of an information resource with Internet access dedicated to memorable places associated with the residency of famous Russian personalities. The authors noted that one of the problems is choosing the indicators and evaluation criteria that characterize the effectiveness and efficiency of museum activities, as well as the impact of museums on society. The following main functions of museums are highlighted: collection, preservation and doc...

The article examines the issues of virtual reconstruction of memorable places associated with residency and activities of V.F. Voyno-Yasenetsky (Saint Luke the Surgeon) in the city of Tambov (Russia). Valentin Felixovich Voyno-Yasenetsky (1877-1961) ? a religious figure, archbishop, famous Russian and Soviet doctor, doctor of medical sciences and theology, winner of the Stalin prize of the first degree. In order to visualize individual objects of memorable places in Tambov, their three-dimensional virtual reconstr...

Most of the time, in assessing a situation where a leakage of combustible gas is involved, the volume of the room where the release occurs and the volume of the released gas is taken into account, thus resulting in an average concentration of the fuel gas applied to the entire volume of the room. In some cases, when the source of combustible gas is close enough to the source of initiation, or when air currents converge at the location of the source of initiation carrying amounts of combustible gas, the explosive m...

Objects of geological heritage of international level are located in the Nizhny Novgorod region. This is the Puchezh-Katunki impact crater of an early Jurassic age, the Bathonian-Callovian deposits of the Jurassic system near the settlement of Prosek on the banks of the Volga and karst lakes and caves in the basin of Pyana and Tyosha rivers. A water induced risk assessment was carried out to include it in application for aspiring UNESCO Geoparks network. The assessment includes the risk of landslides, abrasion of ...

Due to the changes in global climate patterns, wildfires have recently become a significantly greater threat to both human settlements and the corresponding activities. The same degree of threats is applicable for numerous species of fauna and vegetation, all across the world, especially in arid climate areas. Scientists that have conducted research on the subject revealed that climate significantly influences the probability of certain areas towards being affected by wildfires, especially taking into consideratio...

Vulnerability may be considered one of the most important components of the seismic risk, as it is the only one that human society may act upon in order to reduce the risk. As seismic vulnerability implies multiple dimensions, from the physical one to the social and economic ones, a multi-criteria decision-making approach proves to be appropriate for its assessment. The uncertainty inherently involved in the assessment process is addressed using fuzzy logic theory. This paper aims to assess the seismic vulnerabili...

The paper focuses on the experimental determination of the accuracy of automatic angular targeting of total stations. The measurements were carried out with Trimble S6 HP and Trimble S8 HP robotic total stations owned by the Department of Special Geodesy at the Faculty of Civil Engineering, CTU in Prague. Accuracy of targeting was determined with use of both laboratory and outdoor experimental geodetic networks. The laboratory micronetworks were two. One was made up of 10 points with a length of sight from 1.8 m t...