Browse

One of the significant problems in terms of the mining impact on environment is abandoned (due to various factors) deposits and tailings accumulated on landfills. In addition, one of the most important resources for the development of mining is the inclusion of raw materials (as non-industrial stocks) in the economy. There are two ways to solve these problems: a) to achieve economic profitability of the deposit by improving the technologies of extraction and processing of basic raw materials, and b) to develop inn...

The physical and chemical properties of fine sock filter dusts have been studied. It has been demonstrated that a part of the titanium is bound in hard-to-open anosovite that can be enclosed in a shell of amorphous silicon dioxide. Anosovite can be attributed to the phase that is radiographically characterized as the system Fe = Mn - TiO. It is noted that some of the anosovite particles are in a shell of silicon and zinc oxides, and a part is in a shell of silicon, zinc, and lead oxides. The silicate base of the e...

The NAO index has a strong influence on weather over West Europe and the Mediterranean basin but less prominent over the east part of Europe. The aim of this study is the assessment of the influence of the North-Atlantic oscillation on the snow cover conditions in Bulgaria. The winter (December thru March) station-based index of the NAO is used for the current survey as well as data for snow cover maximums from 10 meteorological stations, 4 of them mountainous, for the main period 1930-2020. The linear relation be...

Inhibition of the coil-helix transition of gelatin and retardation of the gelation process of the system as a whole is an important scientific problem. The solution to this problem will make it possible to maintain the properties of gelatin solutions for a long time without changing their rheological characteristics. In this work, by the method of dynamic mechanical analysis, the dependences of the time profile of gelatin solutions depending on the concentration of 10, 13 and 16 wt.%, as well as the different diss...

In the paper the authors present the study results of rock massif fracture based on the case study of a rockburst hazardous Khibiny deposit. The authors have revealed peculiarities in seismic process at different mining stages over a five-year period. The principal aim was to study the particularities of seismicity occurrence when the deposit is mined by approaching fronts, namely, in the periods between bulk blasts in the docking sections between them. The authors have proposed an approach to reveal the features ...

Oil is produced in the form of an oil emulsion due to the high depletion of deposits and significant water cut in wells. The formation of emulsions can lead to a number of complications in the operation of various field equipment, and sometimes even to emergency shutdowns or failures. Therefore, the study of the properties of demulsifiers and their effectiveness is an important task. The work investigates the surface-active properties of seven industrial demulsifiers produced in Russia, such as: interfacial and su...

Environmental problems of mining industry are largely related to the need to store mining and processing waste, occupying large areas and being a source of the natural environment pollution. The Mining Institute KSC RAS has substantiated the methodology and developed the technology for the ecological restoration of lands disturbed during development of georesources in the framework of the rock – biota system evolution by creating a sown cereal phytocenosis without the application of a topsoil layer, which provides...

In this paper was used correlations between LST-NDVI, for warmest day, for 2013-2016.Study area, Iasi, is geographically situated on latitude 47 degrees 12 min N to 47 degrees06 min N and longitude 27 degrees 32 min E to 27 degrees 40 min E. The largest city ineastern Romania is Ia?i and the seat of Ia?i county. Land surface temperature, calculatedfrom remote sensing data is used in a lot of fields of science, like: climate change,hydrology, forestry, urban planning, oceanography, agriculture etc. In earlier therm...

The paper presents some aspects of an experimental research in which basic recipes have been designed in order to obtain innovative products to be used in construction as finishing coatings. Starting from sunflower seed shells, considered a waste rather a by-product resulting from the industry of edible sunflower oil, and also from rough sheep wool, an animal waste from the zootechnical field, and also from the specific thermal insulating characteristics of theese two waste materials, a serie of basic recipes was ...

Old closed uranium mines can be a significant source of environmental pollution and hazards to human health. The problem could become more severe in time due to erosion if the restoration measures are not properly maintained. There are many uranium mines in Bulgaria that, even closed in the 1990s, could be a pollution source for surface and groundwater in their region. Through hydraulic connections, they can contaminate the rivers passing nearby. The aim of the present work was to check the hypothesis of a possibl...

Soil erosion is the most serious soil degradation on the territory of Bulgaria. Estimated average annual potential soil loss from sheet water erosion in Bulgaria amounts to 902.5 million tonnes. Over 68% of the territory of the administrative region of Kardzhali (East Rhodopes) is characterised by risk of sheet water erosion exceeding 100 t/ha y. The paper presents assessments of susceptibility to erosion of soils in the catchment of the Dzhebelska River (Eastern Rhodopes). The assessments are based on the USLE ap...

The purpose of the research was to develop an algorithm for a comprehensive assessment of the sustainable development of a mining enterprise based on an integral indicator from the standpoint of environmental performance and test it on the example of the largest Russian coal and energy company SUEK. In modern conditions the Russian energy sector is in a state of transformation, which is associated with the strengthening of globalization processes, tougher competitiveness and management of production systems. Moreo...

The effectiveness of rhizobia-legume symbiotic interaction is under the genetic control of macro- and microsymbionts. Both symbionts exhibit high level of genome/genome specificity interaction which is reflected by symbiotrophic indices vary significantly. Virulence and plant dry mass increasing are indices widely used in order to reveal well matched rhizobia strain and variety of legume host plant for practice demand. The aim of the research was to study how allelic polymorphism of symbiotically significant genes...

Operations carried out within the oil and gas industry involve the risk of explosions which might lead to work accidents with significant consequences for personnel and installations. The release of a hydrocarbon gas due to various reasons such as improper selected equipment or its’ malfunction, staff negligence, lack of maintenance a.s.o. in mixture with air generates a potentially explosive atmosphere if the mixture’s concentration ranges between certain limits, the so-called Lower Explosive Limit (LEL) and Uppe...

Unlike friable rocks, salt behaves pseudoplastic when blasted, which leads to other premises of the blasting technique compared to those applied for stratified sedimentary or eruptive rocks. Here can also add the salt inhibitory character on the thermodynamic parameters of the explosions, with effects on their efficiencies as well as some particularities of the execution of the blasting works due to the presence of methane gas in the salt mines. The article presents the results of the research carried out in fired...

Activity of many industrial enterprises is accompanied with considerable amount of liquid technogenic waste products containing toxic heavy and non-ferrous metal ions as well as petroleum products, oils, and surfactants that are discharged to surface water together with waste water and used technical solutions. Therefore, efficient wastewater treatment is one of the main directions to decrease the industrial negative impact on the environment. The main sour?es of wastewater pollution with heavy and non-ferrous met...

QDaedalus systems are currently used for astronomical observations to obtain astrogeodetic vertical deflections (VDs). Astronomical observations cannot be made under the same conditions as geodetic observations (e.g., GNSS), because meteorological factors (e.g., cloud cover during observation, high humidity, fog, etc.) and timing of the observations may directly affect the observed benchmarks, particularly regarding precision and accuracy determinations of the VD components observed with the QDaedalus system. For ...

The problem of the antibiotic resistance of bacteria inhabiting the guts of poultry and livestock and furthermore manures and fertilizers prepared from manures is recognized as one of the most serious problems in agriculture. Composting is described as an effective way to reduce the abundance of antibiotic-resistant genes in the final product, however such a positive effect is not always guaranteed. The addition of highly porous components like biochar into composting mixtures is applied nowadays in order to impro...

Today's society encounters cyber attacks on the energy sector not only on a theoretical level but unfortunately also in reality. The total number of cyberattacks is still rising, despite the ever-evolving defense against them. The article contains an overview of the largest cyberattacks in history on the energy sector and ways to carry them out. A cyber attack is a situation where a hacker or their group tries to gain access to key information or elements of the infrastructure. These can be power plants, their con...

Among its activities, the construction industry has a significant impact on the environment. In recent years, therefore, emphasis has been placed on the sustainability of building structures and materials, and ways and means are being sought to achieve this. Specifically, it is about reducing emissions and using the waste produced by recycling materials, e.g. aggregate. The motivation for using recycled aggregates is also to reduce dependence on natural resources, which are declining. The article deals with the as...

Due to the ever-growing importance of resource conservation and sustainable lifestyle, people are searching for new, alternative solutions that will enable a more sustainable use of resources. Because energy production is one of the most pollution-intensive industries, a major factor is renewable energy, which reduces the amount of industry pollution and facilitates sustainable use of resources. One of the sustainable energy resources are Salix and the wood chips produced from them, which are used in energy produc...

The aim of the study is the evaluation of multispectral imaging by unmanned aerial vehicles (UAV) and free available satellite data (Sentinel — 2) for the diagnosis of the nutritional status of winter wheat. For this purpose, a field trial was established in 2020 (28 ha of winter wheat), both on the fields of farm enterprise ZD Kojcice (Pelhrimov, Czech Republic). The observation of the fields was performed in two vegetation phases important for the application of nitrogen fertilizers to cereals by topdressing (BB...

The mitigation of GHG emissions from anthropogenic ecosystems is one of a challenge for following decades. Successful GHG emission mitigation scenarios can be developed if there are tools to predict GHG emission trends according to climate, soil conditions, farm management practices, and other factors. One of the essential GHG emission sources is managed agricultural soils, and the most important factors are soil conditions, soil moisture, and temperature. The conceptual hydrological model METQ has been created un...

Adaptation of materials of Internet resources is the provision of relevant content with maximum consideration for the individual characteristics and needs of the user. Thus, the system developers are regularly tasked with showing users the information that meets their tasks and interests, paying attention to the moments that really have value for certain categories of users. This article is devoted to one of the options for solving this problem. The article discusses the construction of a matrix-graph model for pr...

The use of information and communication technologies has many benefits. Based on many studies, their level is not sufficient. This can be caused by several factors and obstacles. Communication and ICT competencies are one of the key factors for the active use of advanced technologies for the management of sustainable construction projects. This digital age requirements systematic communication and project management. In this pandemic time, it can be considered an even more important requirement. It is the level o...

Annually, worldwide the food industry generates huge quantities of plastic packaging (polyethylene, polypropylene, polystyrene, polyethylene terephthalate, etc.) and due to their chemical structure takes hundreds of years to degrade, thus creating major environmental problems. Therefore, the aim of this study was to develop biodegradable films that can be used for food packaging and to identify their physical and mechanical properties. The biodegradable films were obtained using 150 ml Milli-Q water and different ...

The Danube-Black Sea Channel, inaugurated in 1984, although it has a dark history, is also of significant importance at European level, being the third longest navigable channel in the world, after the Suez Channel and the Panama Channel and connects the North Sea to the Black Sea through the Rhine-Main-Danube Channel, shortening the route of goods transport from Australia to Central Europe by 400 kilometers. The channel has a total length of 95.6 km and consists of two branches, a main one having 64.4 km long and...

This article describes gas hydrates formation, with methane and carbon dioxide as guest compounds, in a small-scale experimental apparatus, appositely designed to reproduce marine offshore reservoirs. The sediment consisted of pure quartz porous sand impregnated with FeSi3 particles, which are produced via gas-atomization and are usually destined to applications in additive manufacturing. Experimental results were compared with the theoretical equilibrium conditions for both types of hydrates. It was established t...

The hydrogenation of carbon dioxide (CO2) to methanol in presence of nanocatalysts has been reported as the one of the most economical and effective ways to reduce CO2 emissions. Over the past several decades, numerous efforts have been made to develop effective catalysts for CO2 hydrogenation to methanol. Among these, the CuO and ZnO based catalysts were highly active for methanol synthesis. Many studies have shown that SBA-15 (Santa Barbara Amorphous or mesoporous silica has good application prospects as a catal...

Training and development are a learning process that offers new and existing employees to acquire technical knowledge and skills and behavioral development attitudes so that their work is as effective as possible. Given the importance of staff training, this research measures the effect of training on the performance of employees of commercial banks in Kosovo, an important factor given that the growth and development of any organization is linked to the development of human resources. Quantitative methods used to ...

The European Green Deal is one of the attempts to make our economy more sustainable in the long run, and these issues have been increasingly raised in Latvia over the recent years. Promoting changes in daily food consumption habits could also improve people’s quality of life in the future. In a globalized food system, small and local businesses are often being pushed out of the market, which is divided between the big producers and food chains. However, food is also part of each country’s unique cultural heritage ...

Solid-state dissolution by sintering in the presence of Na2O2, a strong oxidizing agent, isreported in the present study as a preparatory procedure prior analysis by ICP-MS. Theadequacy of the combined procedure for the purpose of identification of potentialsecondary sources for REEs from difficult matrixes like, for example, mining wasteswas investigated. The method was applied to Certified Reference Materials (CRMs)with silicate-rich complex matrices, namely rhyolite, and granite. From each materialtwo sample we...

Terrain mapping has always been a process that ensured the economic development of countries and regions of the world. This was achieved due to the well-coordinated work of geodesists who receive geodata and cartographers presenting these data in the form of a cartographic image. For many centuries, the main task of cartographers was to accurately show the location of objects and their main characteristics using map symbols and cartographic methods. In the XX century, ideas about the essence and content of terrain...

Cadastre and Land Registry for Alba County in relation to the other counties of our country. Alba County is made up of 78 administrative territorial units, in which, within the framework of the programme, systematic registration works are carried out, both at cadastral sector and at ATU level. The works have been and continue to be financed from the own revenues of the National Agency for Cadastre and Real Estate Advertising (ANCPI), through the Office for Cadastre and Real Estate Advertising (OCPI) of Alba, but a...

The economic development of the Arctic region is a priority for the Russian Federation in the coming years, and this creates new challenges for Russian science in developing technologies and devices that can reliably and effectively function in the harsh conditions of the deeply negative temperatures of the northern territories. The paper examines the basic principles of low-temperature operation of molecular-electronic devices for recording motion parameters and wave fields, namely, the step-by-step operation of ...

The COVID-19 coronavirus pandemic has negatively affected all sectors of the economy around the world. At the same time, tourism was one of the most affected business sectors. The history of tourism shows that the industry is exposed to crisis phenomena earlier than any other sphere of economic activity, but it adapts to new conditions much faster and more flexibly. The crisis of 2020-2021 is usually compared with other crises that the tourism industry experienced in the 2000s in Russia. In this paper the characte...

A Geopark is a demarcated area with particularly interesting geologic heritage. Since the physical landscape is intimately related to both cultural and ecological characteristics, knowledge about geological sites can be essential for management of the resources in these settings. In this context, we suggest the term “Landscape Geopark” in order to stress the regional system perspective. Therefore, various stakeholders need to be included in Geopark planning, including researchers, tourists, seasonal and permanent ...

The main objective of the study was to estimate the level of shallow well water pollution and the impact of natural and anthropogenic factors on it and to use the research results for the prognosis of the pollution level and the reduction of pollution. The subject research is water of shallow wells. Analysis of the shallow well water quality has been carried out in Lithuania, Kaunas region, in 83 shallow wells. Wells situated in Pypliai village were chosen for a more detailed examination. Shallow wells are usually...

In 2019, a new, modern Strategy of the Environmental Policy of the Slovak Republic until 2030 (the Envirostrategy 2030) was approved. The previous one has been in force since 1993, so it was only a matter of time before implementing a strategy to address current environmental challenges and problems. Along with industry and energy, transport is one of the main producers of greenhouse gas emissions. According to the statistics of the Ministry of the Environment of the Slovak Republic, the amount of greenhouse gas e...

When building new or upgrading existing control centers, ergonomists and designers strive to design solutions that improve operators' working conditions, including work comfort, and reduce their psychological burden stemming from the complexity of their activities and the high responsibilities they bear. However, meeting the needs of operators, while adapting to space constraints or specific technical requirements for the control system, is very difficult. Coping with this difficult task, therefore, requires a res...

The growing importance of a cultivated environment with a high population density was an incentive for the authors to find and compile a new, more sensitive sophisticated approach to the valuation of immovable cultural monument. Primarily, objects with significant historical and architectural value were examined, for which there was a high possibility of finding and defining suitable criteria with an impact on the valuation of real estate. The research focused on immovable cultural monuments located in the statuto...

Belt conveyors constitute an important part of the machinery for the underground and surface mining of materials. In the course of time, conveyor belts proved to be the most efficient way of transporting material, which is still valid not only in the mining industry. For the transport of rocks to a mine disposal site, a combination of multiple belt conveyors is necessary. Places of transfer belong to the most stressed parts and there are frequent breakdowns. They operate in difficult conditions and are subject to ...

Changing climate variability and the type of land use are the main factors influencing the hydrological regime. The hydrological regime of the lake has a direct impact on biodiversity and has an impact on socio-economic processes in areas adjacent to the lake. The aim of the study is to predict and assess the impact of climate change and the change in the type of land use on the hydrological regime of Lake Usma. Two linear land-use change scenarios were used for modelling. Twelve climate scenarios were used to mod...

The article presents the data obtained by the authors during the expedition research in the largest bay of the Azov Sea - the Taganrog Bay. Its characteristic feature is shallowness, flowing due to water exchange with the Don, small rivers, and the development of surge phenomena. The ecosystem of the bay has been experiencing strong anthropogenic pressure for several decades. The authors analyzed the behavior and distribution of mercury dissolved and suspended forms in the surface and bottom layers of water, depen...

The existing approach to organizing big data processing requires the analyst to understand the set of initial data. This understanding presupposes the presence of knowledge not only about the list of available characteristics, their fullness, noisiness, etc., but also about the nature of their occurrence - the semantics of the data. Big data semantics can be represented using context. The context in the project refers to the activity in which the data is used or because of which was obtained. Applied scientific ap...

Urban agriculture has become increasingly topical in recent years due to both social trends and challenges of sustainable development. Although functions of the urban agriculture, especially economic and social, have been widely explored since the 1990s, the focus is mostly on regions where urban agriculture practices are strategies for survival and basic food security or on highly metropolitan cities, with little focus on countries and cities with a relatively medium or even low population density, thus excluding...

The work is devoted to the assessment of the natural protection of groundwater in the Ternopil oblast (Ukraine). The evaluation is based on the parametric method of V. M. Holdberh. The characteristics of the geological structure of the aeration zone and aquifers are given. The areas of the greatest influence of karst on the protection of aquifers are determined. The stratigraphic confinedness of water intakes and large deposits of groundwater is described for further analysis of their protection. Since more than 5...

Vulnerability, land use and sustainability are some of the main elements of major concern in the last decades that can be translated in practice through efficient development and planning. The role land use plays is recognized worldwide due to the rapid and continuous urban growth and development, which determine the occurrence of new powerful forces leading to social, demographical, environmental, technological and governmental changes. The large number of disasters in recent years demonstrated that the most effe...

The article presents some case studies of negative impact of human activities on underwater cultural heritage from Black Sea. A serious problem is the pollution and the litter disposal in the historical harbours. The resulting conditions often endanger some impressive and well-preserved underwater cultural heritage sites. An advanced methodology for litter registering and assessment was developed and applied using remote sensing with side scan sonar, subbottom profiler and orthophotography using a drone. The surve...

During 2019-2020 the study of the soils of 6-8-row (30 meters) ash - elm shelterbelts of an agroforestry landscapes (typical forest-steppe of the Belgorod oblast) and the soils of adjacent agricultural landscapes was conducted. The regime observations of the field moisture capacity in chernozems in 2 key areas were executed. The objects of study in both areas were the soils of flat watersheds with a deep (more than 10 m) level of ground water; soils were studied in the central parts of the field protective shelter...