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Samples of ore for micromineralogical research were selected from the core of boreholes. The mineral composition of the ores, their textural and structural features were examined under an optical microscope in reflected and transmitted light, scanning electronic microscope (SEM) and energy dispersive X-ray spectrometer (EDS) with microanalyzer. Mineralization by its composition is sulfide. The nature of mineralization is imbedded. Phenocrysts are presented by separate idiomorphic grains of pyrite, aggregate interg...

The paper deals with the problematics of tracking of dynamic parameters in an enclosed space. Its focus is on temperature dynamics in three layers during a fire in the small-scale models. 3D outdoor fire modelling test has been made as the most realistic way of outdoor fire testing. Various phases of the fire, the temperature change related to the fire phase and various fuel sources are observed and analysed. The flashover phenomena was present as expected. Experiments and analyses of material flammability charact...

Carpathian Foredeep (CFD) is a mature Petroleum Province, where conventional biogenic gas has been produced since 1950s. At present the CFD is again object of petroleum prospecting, this time, as unconventional gas province. To improve resolution of this analysis, regional 3D structural model was constructed and divided into six main depositional complexes by developed on the basis of seismic data and geophysical logs interpretation. The model is located along the front of the Carpathians covering area ~4500 km2. ...

This article presents the results of an integrated model for the Saban field which located in the Omar main fields at the eastern of Syria. The field is some 11 km by 3 km orientated in NW-SE direction with 33 wells drilled into three main reservoir blocks (Block 101, 102 and 103) developing the Rutbah cretaceous and Mulussa Triassic reservoirs. The field is in production since 1990. The purpose of this model is to guide future development well drilling to optimize reserves and extend field life. The input data in...

The impact of climate change on agricultural sector has grown in the last decades from local to macro-regional scales. Based on 14 indicators, a comprehensive image regarding the interrelationships between socioeconomic and climatic factors was obtained for characterizing the agricultural sector from Teleorman County, Romania during 6 years. An analysis of available time series was performed to obtain descriptive, associative, and comparative statistics of the data set. Pearson correlation was used to estimate the...

The biogas obtained through processing of livestock residual waste (dung, manure and residual food), food production waste (fruit, vegetable, meat and dairy residues) and also effluents from industrial and municipal wastewater treatment plants can have a significant contribution in energy supplying and environmental protection. In order to determine the quality of this renewable fuel, it was developed a fast gas-chromatography method, through which it can be establish the calorific values, that have an important i...

The article deals with a basic economic image of the inland company Severo?eskпїЅ doly a.s. from 2010 until 2014. It is a company producing most brown coal in the Czech Republic. An economic insight into the company reveals important information for investors, but also for employees themselves, eventually it provides suppliers and customers with many useful data. The article presents basic economic indicators within a chosen period, their development and overall evaluation. It is indeed the economic analysis of th...

The surface water streams in the ore mining areas are subject to intense contamination with heavy metals and toxic elements. This type of pollution is a widespread problem nowadays. Detecting the geochemical patterns of the migration of heavy metals and toxic elements, together with their impact on natural environments, is a key aspect of ecological and geochemical research. This study is proposed in order to evaluate the state of the surface water streams in impact zones pertaining to the technogenic formations o...

Geo-electrical sections were constructed according to electrical resistivity tomography data on Shahtama tailings of Mo- ore processing plant (Transbaikal Kray, Russia), located in the permafrost zone. The capacity of technogenic deposits was determined and the zone of the fault was delineated. A wide range of electrical resistivities (ER) of mine tailings was revealed due to their different particle sizes, humidity and partially frozen condition. The statistical analysis of the distribution of resistivity of tech...

The evaluation of the behaviour of natural stone applied in the built heritage of the historical centre of Porto city, Northwestern Portugal, classified World Heritage by UNESCO in 1996, has been carried out using a multidisciplinary approach in order to characterize both the rock that constitutes the main body of the building and the deterioration processes that have developed on the stone as a consequence of environmental and anthropogenic factors. Among an extensive and monumental historical heritage, built wit...

In comparison with other economic sectors, the agriculture is known for its specific characteristics. First, the production processes in agriculture are supplemented by a factor of the impact of natural conditions, weather, the length of the production cycle and associated length of current assets turnover. Financing of agriculture is formed from public or private sources in the form of equity capital, loans or gifts to enhance the development of this sector. It includes not only government funds through various g...

In this work, synthesis and swelling of a superabsorbent hydrogel based on copolymer of acrylic acid and acrylamide filled with pectin were investigated. The structure, thermal stability, sorption capacity and morphologies of the developed composites were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric and differential scanning calorimetry analysis (TG-DSC), voltammetry and scanning electron microscopy (SEM). In addition, the swelling properties, and the stimuli-responsive behavi...

The numerous cases of the upper headwaters drying are observed in the plains of the Middle Volga region. The reasons of the streamflow change pertain to the reduction of forest vegetation and the change of its species composition. More than 1000 cartographic materials for more than 200 years, as well as aerial and satellite imagery were used during the research of forest vegetation breadth. Currently, the forest and the forest-field landscapes prevail in the north of Tatarstan, where coniferous-deciduous forests a...

Mining is a strongly impacting anthropogenic activity, affecting to a greater or lesser extent the natural components. Thus, it is consensual that should be established a common practice that aims at the recovery of degraded mine sites. Otherwise, environmental balances can be irreversibly destroyed, with serious negative consequences for surrounding ecosystems, including humans. Therefore, the environmental reclamation of a mine site can be defined as the general process of repairing disturbed, damaged, degraded,...

Rare earth elements (REEs) are a group of 17 elements including scandium, yttrium and 15 lanthanides. There are a number of applications for the REE in different industries, e.g. super magnets in electrical engines in vehicles and generators in wind turbines, fluorescent lights, catalysts for the automotive end petroleum industry. REEs are crucial concerning the rapidly developing clean energy applications and with the highest risk of supply. To meet the future demand, it is necessary to develop efficient, economi...

In 2016 Pasztor and Schultz[1] proposed an analytical method for calculating a perforation designпїЅs effect on hydrocarbon-well inflow, using a new concept to analyze the effect of the shape of the perforation channelsпїЅ drainage area. The method compares well with standard industrial methods used to calculate the pressure drop caused by a given perforation design. In 2017 Toth and Pasztor[2] applied their model to investigate geothermal-well inflow, and achieved promising results. The modelпїЅs complexity makes...

Energy production from renewable sources, such as wind energy, in small-scale generation systems can be increased by improving the efficiency of power generating equipment and expanding the applicability of the implemented technologies. The performance of wind turbines can be improved by developing solutions that expand the range of wind speeds over which energy can be effectively generated and by optimizing the location of wind turbines. The presented system for multipoint measurement of wind parameters (SMMWP) i...

A source of thermo-mineral water of Vranjska spa is of great importance for environmental protection of rural settlements. Wealthy mineral water composition and the temperature of 93пїЅC are very suitable for the spa tourism development. Capacity of the water source allows appications in industry as well as in food production. Geographical position, developed road network, vicinity to the highway and consumers attainability allow economic development of Vranje region, to whom population from other regions gravitat...

In connection with finding - out of a question about probable feeding of deposits by hydrocarbons, acting from the basement, the results of integrated geologicalgeochemical research of the dynamics of variation of chemical and geochemical parameters of oils and bitumen from the rocks of sedimentary cover and basement in the zones of probable inflow of hydrocarbons at the central areas of the Romashkino oil field are presented in this work. Also the results of researches on comparative studying of changes in organi...

Oil-saturated Visean dolomite reservoirs were studied from the Tatarstan Republic, east of Russian platform. The main methods of study were X-ray and SEM analysis. Dolomite forms interstratified dense and porous layers with thickness of 0.5-4.0 m in oil-saturated parts of reservoirs. The dolomites are characterized by rhombic form of crystals. Many of them have crystal growth zones as alternate micro-layers with different iron content. In the pore space of dense dolomites find some iron accessory minerals such as ...

The natural oxidation of iron-sulfide minerals (mainly pyrite) contained in mine waste material can produce the acid rock drainage (ARD). It leads to low acidity, high sulfate and iron concentration in surface and ground water and its heavy-metal contamination. This study investigates ARD prediction for sulfide-bearing mine waste rocks in the Verhne-Krichalskaya area, where the epithermal gold-silver deposit is located (Western Chukotka, Russia). Twenty samples of waste rocks (altered dacites, andesites and rubble...

One of the main problems in the exploration of porphyry copper deposits is the process of acid rock drainage and metal leaching (ARD/ML), that develops during storage enclosing rock in a dump. ARD/ML is formed by the natural oxidation of sulfide minerals exposed to air and water. It leads to the production of acidic, sulfate waters and results in the heavy-metal contamination of surface and ground natural water. Standard procedures for the evaluation of waste rocks ARD/ML potential are static and kinetic tests. St...

The technology of microbial fuel cells (MFC) makes it possible to obtain electricity by eliminating and utilizing wastewater components [7]. The promising biological agents in the MFC are microbial associations. The presence of strains of different species of microorganisms allows consortia to consume a much wider range of compounds. Multicomponent makes them more resistant to negative environmental influences. An example of such associations is the sludge of treatment facilities. As part of most wastewater enteri...

Wastewater treatment plants are essential in terms of environmental protection. The processes taking place into wastewater treatment plants are complex and require specialized machinery and equipment capable of operating in special conditions. Starting with the Sequential batch reactor (SBR) system (biological mechanical, chemical processes are carried out in the same basin), it could be reached a complex architecture with separate tanks, resulting scheme with predenitrification-nitrification, nitrification-postde...

The paper presents an analysis of a waste heat volume that may be recovered in dual-pressure waste heat recovery systems (DPWHR) cooperating with the selected two-stroke marine diesel engine. The analysis covers four developed DPWHR systems (two of them generate saturated steam and the remaining two generate saturated and superheated steam). The heat in the exhaust gas and charge air is also included therein. The steam, generated in the DPWHR system, is employed to provide heating at a ship and to drive the turbog...

Generally, there are 3 basic approaches to fire modelling. The oldest one is full scale modelling, than the small-scale modelling and finally PC simulation modelling such as FDS. If we compare the basic properties of these three approaches, we can compare following criteria. The most important is accuracy, relative costs, professional competence, time of preparation and very important is also the number of possible iterations within a short time period. The highest accuracy still belongs to full-scale models. Full...

This article discusses the questions of agroecology, its role and significance in the modern economy. It emphasizes the impact of agroecology on food production, country food security ensuring, as well as contribution to the sustainable agriculture. The authors also accentuate the relationship of agroecology with sectoral clusters, which are one of the modern forms of economic activity organization in agro-industrial sphere of Russian Federation economy. The article describes preconditions of the clusters formatio...

Lowering energy consumption in the residential sector is one of the main priorities in the European Union. This can be achieved by increasing the thermal insulation of the buildings and using renewable sources for energy. One of the most common solutions is the use of heat pumps to produce thermal energy for heating / cooling indoor spaces and for domestic hot water. The geothermal heat pumps are used, but with increased efficiency of air/water heat pumps, they become effective solutions. This work studies the eff...

This paper presents the integral equations of the direct problem of magnetic prospecting with respect to demagnetization. These equations are derived for a two-layer medium model. The method of determining the intensity of a secondary magnetic field for the case of magnetizing by a static field, which potential is a harmonic function, is described. The respective integral equations are written based on the theory of a simple layer potential. An iteration algorithm for solving the three-dimensional structural inver...

One of the main environmental issues of society today is the continuous increase in the amount of organic waste. Sustainable organic waste management no longer supports old practices that involved uncontrolled releases, landfill storage or incineration. A potential solution is converting organic matter into energy. Previous papers dealt with energy recovery of animal proteins and fats from tanneries into biogas and biodiesel after separation of the two components by pressing-centrifugation at temperatures of 60-80...

The concern about the environmental contamination by 241Am is caused by the fact, that its half-life period is longer and its mobility is much higher than that of parent plutonium. That is why in soils and sediments the specific activity of the radionuclide increases over time. The alpha-decay energy of 241Am and the relatively short lifetime of the isotope create high specific radioactivity and thermal yield. In bottom sediments, the ratio of 241Am to 241Pu increases every year. All these factors result in a high...

The article compares power gains from horizontal polycrystalline and vertical monocrystalline photovoltaic installations operating under identical, real-world conditions in the city of Olsztyn. The study was conducted between 1 October 2014 and 31 August 2017, excluding a monthly downtime period between 24 January 2016 and 2 March 2016 which occurred due to unexpected technical difficulties. The paper analyzes the long-term efficiency of monocrystalline and polycrystalline photovoltaic installations under the real...

Hydrostatic transmissions create compliance between rigid functional parameters of a power-machine, e.g. an electric motor, and flexible functional parameters of the work machine, e.g. a crane hoist. Hydrostatic transmissions equip fixed or mobile machinery and guidance systems for: aviation, artillery, wind turbines, hydraulic turbine blades, etc. Any hydrostatic transmission includes at least two positive displacement machines: a pump, called transmission пїЅprimaryпїЅ and a motor, called transmission пїЅseconda...

According to the geological maps of southern Spitsbergen, faults commonly run parallel to the glacier valleys' axis. General faults orientation is N-S and NNW-SSE. This may suggest, that the origin of glacier valleys is related to tectonics due to development of structural landforms on individual faults. The network of ground penetrating radar (GPR) profiles based on measurements on three glaciers of southern Spitsbergen: Recherchebreen, Hansbreen and Werenskioldbreen, was processed and interpreted for the presenc...

permanent concern of the researchers regarding the environment protection and the improvement of life quality in order to sustain the society development is orientated to viable solution for reducing the global warming. The main contributor to this negative phenomenon is represented by the carbon dioxide (CO2). This gas results in various processes, such as fossil fuels combustion or as a by-product from bio-hydrogen production. Also, the carbon dioxide is one of the main contaminants of natural gas and usually it...

Nanomaterials have become so popular thanks to new and unique properties differing them from their classic counterparts. One of the nanomaterials which is commonly used nowadays is graphene and its derivatives. This paper demonstrates the results of laboratory-scale experimental works on the influence of ultra highly concentrated single-layer Graphene Oxide (HCGO) on properties of water based-mud (WBM). GO is a mono-layer of sp2-hybridized carbon atoms derivatized by a mixture of carboxyl, hydroxyl and epoxy funct...

This paper analyzes the causes of groundwater breakthrough occurred during the excavation of deep pit in the central part of the city at the territory, which was being developed since the 14th century. Particular attention is paid to historical aspect of this area contamination and its impact on negative transformation of the underground space components such as soils, groundwater, gases, and microbiota. It is shown that the specificity of hydrodynamic and hydrochemical conditions has fundamental importance for as...

The comfortable room environment and thermal comfort depends on internal factors and influences on the human organism. People are very sensitive to changes in indoor climate conditions. The body reacts feeling of thermal discomfort for some fluctuations. Thermal comfort is given by the air temperature and radiant heat, air velocity and relative humidity in the room. The main impact of these factors on the comfort level of individuals depends on the activity and type of clothing. Dantec ComfortSense system offers t...

The overall objective of the project is to increase the energy efficiency in public Government buildings in Kosovo through implementation of energy efficiency and renewable energy measures in 140 (140 out of 369 total number of government building stock) public buildings in Kosovo. The updated European Energy efficiency directive sets the energy efficiency target of 30% for 2030 including measures to update the Directive and make sure the new target is met. All European countries have set their national policies a...

The article deals with an innovative way to transfer heat for hot water. A device operating on this principle is called a heat pipe. This device works on the principle of phase change of the working fluid (heat transfer medium). The very principle of heat transfer is based on the theory of evaporation and condensation of the working fluid (heat transfer fluid). Heat pipes are classified according to the method of operation and location of use. A subdivision of heat pipe in terms of their actual use in the desired ...

The pastoralism, with tradition in the history of the Romanian people, embraces various forms. In this viewpoint, the entrance with animals on pasture is linked to the Orthodox religious holiday, Saint George, celebrated on the 23rd of April. In the Romanian people tradition, too, the entrance with animals on the pasture is carried out in spring, after the flowering of the blackthorn (Prunus spinosa L.) present in protection belts or green fences that delimitate parcels in the studied area. Under such circumstance...

Constant economic development has an influence on the global emission of greenhouse gases. Having experienced natural disasters, e.g. floods and droughts, most of the highly developed countries became more conscious about their impact on the environment. In 2014, the global CO2 emission accompanying fuels combustion and industrial processes totaled to 35.669 billion tonnes, in that 298.131 million tonnes in Poland[15]. The counteracting climate changes in view, in March 2007 the European Parliament assumed an ener...

The maritime territories play a significant environmental, economic, social, cultural and recreational role. It is therefore important to achieve a balanced, sustainable development to ensure equal opportunities for the population of all regions, bridging any gaps between the territories. Special attention is paid to developmental directions and opportunities of the maritime territories. The purpose of this research study is to identify the factors affecting development of the maritime territories of Latvia, perfo...

The moderate-size earthquake with local magnitude 5,7 which occurred on November 22, 2014 in Vrancea region, at 41 km depth, is the largest crustal event instrumentally recorded at the bending of the Eastern Carpathians. Using the method developed by [2] termed the Hash method, (incorporated in Seisan software) we obtain the focal mechanisms for earthquakes that occurred in Vrancea region associated with the seismic sequence of November 22, 2014. We have examined the main shock and 29 aftershocks that occurred aft...

Grasslands, as specific components of the hill area from the West of Romania, belong, according to latitudinal and altitudinal zonation, to different vegetation zones, in concordance with the environmental conditions and implicitly with their own vegetal formations. Grassland classification in a certain vegetation zone offers very important information on biocenoses and biotopes, and also on its пїЅagronomicпїЅ characteristics (productivity, grazing capacity, maintenance, etc.). This study may be considered a theo...

Use of biomass for energy purposes is one of the viable priorities of the energy and forestry policies of the state. Given the expanse of forest in Slovakia include the forest biomass among one of the best renewable energy potential. It is used in the traditional way as it is burning, but also further processing of the products in the form of pellets or briquettes. Appropriate are also fast-growing trees. Currently, large amounts of available biomass are unused. These are mainly so-called biomass waste residues of...

In nature simultaneous manifestation of several processes takes place: diffusion and filtration of hydrocarbons, their emergence, overflows along tectonic fractures, etc. Other things being equal, the dispersion of gas accumulations occurs much faster than oil accumulation, due to greater mobility (migration ability) gases, better solubility in water, higher diffusion capacity, etc. All these natural processes that can lead to the redistribution or destruction of oil and gas accumulations take place mainly over a ...

The article emphasizes that the important features of sustainable development in its multifaceted nature. It refers to a number of sciences, including economics (including logistics and transport), social and natural. The idea of sustainable development is integrated at the stage of planning, implementing and controlling infrastructure projects. The basic purpose of infrastructure projects is to balance the fundamental elements of the system that shape the future of the human society on earth: the environment, soc...

The paper deals with problem of analyzing the changes between the extent of the territory, which is affected by the release of ammonia from the stationary source and the changing atmospheric conditions in this territory. To determine the extent of threatened area the ALOHA program environment as a spatial decision support tool was applied. As a scenario the release of ammonia from the tank, i.e. tank wagon staying at the freight railway station in Zvolen. The results of the analyses confirmed the fact the atmosphe...

Co-operation of renewable energy sources (photovoltaic cells or micro-wind turbines) with 230V receivers, eg LED substitutions of traditional light sources, requires the conversion of low voltage direct current electricity to 230V AC. Various designs of DC/AC converters intended for island operation and synchronized with the power grid were tested. The Hioki 3196 energy quality analyzer was used for the study. The stand-alone systems are used in voltage converters of very simple solutions converting DC power to AC...