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The main goal of our work was to define qualitative (geochemical and mineralogical) and quantitative composition of suspensions (solid phases), which originate in the outflows of mine waters into surface streams and significantly affect the quality of their waters and river sediments. The research was implemented on several abandoned mining areas in Slovakia, where Sb, Cu, Fe and Hg were exploited in the past. Mineral phases - mainly oxyhydroxides of Fe, Al and Mn - are transported by surface waters and are conseq...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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 ...

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...

The interruptions in electrical energy supply are unplanned events, determined by faults of the distribution network?s components, lightning strikes or unauthorized interventions in the distribution networks. Insulation faults, occurring in medium voltage networks, produce transient regimens with overvoltages/ overcurrents of very high values, produce large requests of network, switching equipments, generators and telecommunication systems. Because of this, the neutral point of the secondary transformer in the med...

D-glucose simultaneous catalytic hydro condensation with methylamine can beconsidered a promising way of methylglucamine synthesis. Amines such asmethylamine are reacted with materials such as reducing sugars in hydroxy solventssuch as methanol to prepare N-alkyl polyhydroxy amines. Accordingly, glucose isreacted with methylamine and the resulting adduct is hydrogenated to yield N-methylglucamine. The production of N-methylglucamine as early as 1935 was patentedby American scientists Robert B. Flint and Paul L. Sa...

The main goal of the presented research was to compare the nitrogen use efficiency (NUE) of winter wheat and white clover mixed cropping system (MC) with sole cropping system of winter wheat (SC). The above goal was investigated using lysimetric experiment carried out for two vegetation periods (2012?2014). The experiment consisted of seven variants with different cropping system and level of fertilization: five variants were grown as MC (0 kg N/ha; 112 kg N/ha; 112 kg N/ha + 1.25 L of humic acids/ha; 70 kg N + 0....

This paper presents a cross-sectional analysis of the noise on the navigation bridge of a commercial ship that navigates a section of the Romanian Danube segment. This room is important because here are given all the commands for safe navigation so the conditions inside it must be of the highest quality. Determinations were carried out on the pusher, between Braila and Calarasi, in February 2018, in very difficult weather conditions. The noise was measured with BlueSolo 01dB sonometers. These were placed on the na...

The laser diffraction (LD) is one of the most widely applied grain size measurement methods. The main advantages of LD are: (1) relatively short time of single measurement, (2) low cost of analysis, (3) simplicity of sample preparation, (4) great amount of acquired numerical data. One of the less frequently obtained parameters, often provided only by application of dedicated external hardware, is so-called ?elongation parameter?, ?grain shape factor? or ?grain shape parameter?. Due to the inability of direct expor...

The article deals with a numerical simulation of the forced airflow around a heat exchanger with the finned tubes in the electrotechnical box, by finite volume method in the program Fluent implemented in the program ANSYS Workbench. The work contains an analysis of the impact of forced airflow on the heat exchanger with the various placed the electrical components. The primary objective of this work is to analyze and evaluate the numerical simulation models to optimize the forced flow around the heat exchanger and...

Carabids are an important family of predatory species that regulate harmful insect species from fruit plantations. The researches made clearly show the structure of the taxa, their dynamics and their abundance.In order to collect the biological material from the apple fruit tree plantations, were used soil traps type Barber, which in each of the two years of research (2017-2018) was represented by six traps placed at ground level in the row of trees, and as a liquid we used a salt solution with 25% concentration. ...

The research was done in some agricultural ecosystems represented by a fruit tree plantation and an autumn wheat crop at SC Loturi Service SRL Delesti, Vaslui County. The collection of entomological material was done using Barber soil traps. In each year of research, studies were conducted over almost the entire growing season, from May to September. The harvesting of the trap was done at intervals ranging from 7 to 14 days, the number being vaied from one year to the next. From the collected material, only the sp...

Aluminium is not essential but could be harmful to human health, being associated with severe diseases of the nervous system, such as Parkinson's disease, amyotrophic lateral sclerosis (Lou Gehrig's disease) and Alzheimer's disease. Dissolved aluminium can become toxic to aquatic life and to the roots of sensitive plant species. Exposure to aluminium from water is a concern in Sofia region since its concentrations occasionally exceed the environmental quality standard for Iskar river, which is the main drinking wa...

The Volga-Ural oil and gas region (Russia) is the most geologically studied. Numerous studies have proved the relationship between neotectonic activity and oil-bearing structures of the sedimentary cover. Previously, a detailed fault map has been compiled for the crystalline basement of the region. In the conditions of depletion of traditional reserves in anticline traps, the most in-demand objects of further hydrocarbon searches are tectonically screened oil accumulation. Remote sensing and GIS techniques were us...

Diapir Folds Zone (= Mio-Pliocene Zone) as major subunit of the Carpathian Foredeep lies between the Buzau and Dambovita valleys and between the folds of the inner Carpathians and the external flanks of the Carpathian Foredeep. This geological unit represents the most prolific zones of accumulation in Romania in which numerous hydrocarbon deposits of Tertiary age have been discovered in more than 150 years of exploration. Diapir Folds Zone can be considered a world class hydrocarbon province having several ?giant?...

One of the important environmental problems in the development of copper ore deposits is the pollution of biological objects located in the zone of influence of mining enterprises. This problem is most relevant for sulfide copper ore deposits, which include a number of heavy metals that are toxic to the environment. Geochemical processes, occurring during the development of such deposits, lead to the entry of heavy metals into the surrounding landscape and their accumulation in the grassy vegetation. It is necessa...

Fluorescence analysis is widely used in various scientific fields. It has many practical applications in biology, medicine and chemistry. Geoscientists can benefit from using it as well. For example, hydrocarbon saturation and carbonate content can be measured by illuminating rock samples with ultraviolet light and evaluating the intensity of emitted visible light. The most interesting case is where the wavelength of the released light is greater than that of the incident light. In geology and geophysics, fluoresc...

Economic dispatching is a significant analytical function associated with the Energy Management System (EMS) activity. Economic dispatch is well-defined as the development of distributing production levels to switchboards so that the organism load is delivered fully and economically. The purpose of static commercial transmission is to calculate the harvested power of each generation division for a certain period of time so that all requirements with minimal cost are met when different technical limitations of the ...

The contribution aims to unify the procedures for the creation of anthropogenic soil profiles in the mining areas of the Ore Mountains foothills (Podkrusnohori) and to present a comprehensive overview of the possibilities of using permanent grasslands in soil protection with a focus on the Usti nad Labem Region in the Podkrusnohori area, especially the wider area of the Most Basin, where the creation of anthropogenic soil profiles is an essential part of the technical reclamation of spoil tip and quarrying sites. ...

The paper analyzes the existing methods and tools for removing oil or petroleum products from the water surface as a result of the oil and petroleum product pipeline rupture. The main groups of methods with indication of their main disadvantages are presented. On the basis of the data obtained, the main direction of the combination of oil spill response methods is established in order to reduce the time of measures and improve the quality of water treatment. A set of activities aimed at minimizing the occurrence a...

The research task presented in the paper covers utilization of computer based method for performance optimization and penetration estimation of shaped charges. The code is used in computer simulations, depicting dynamic non-linear phenomena. This is a perfect tool describing such phenomena as: expansion of detonation products, propagation of shock wave, rapid strains. The LS-DYNA program is used in many scientific and industrial fields, both on an initial stages of product development and on its final stage. The c...

The Pechenga ore region spatially combines platinum-metal plutogenic, copper?nickel volcano?plutogenic, uranium-ore and gold-ore fluid-metasomatic systems, which are formed under different geotectonic regimes in the Karelian and Svecofennian (2.4?1.6 billion years) stages of development of the Baltic shield, as well as lead-zinc mineralization of the Paleozoic age. At the same time, the role of mantle sources and processes in the formation of ore mineralization decreased, and intra-crustal mineralization increased...

In 20-21 the Century the environment protection is a main question in Europe. One of the answer is organic farming. In organic farming the farmers and producers produce food without using chemicals and artificial fertilizer. Today the organic food? market is large enough to research its characteristic. The article researches EU organic farming situation and in a region of its characteristics. European countries? situation is analysed and the question is what did and what to do in the future for the consumers to be...

When identifying and assessing production reserves leading position occupied by the problem of rational load of the productive apparatus, because the fullest satisfaction of the demand made by increasing the production of finished products, to optimize load capacities of the enterprise while reducing production costs. In the context of the current unstable economic situation, enterprises need to adapt to the ever-changing conditions of the external environment and, first of all, to deal with competitors producing ...

In accordance with the hypothesis of cold homogeneous accretion, it is usually assumed that the Earth?s core and mantle resulted from the gravitational separation of iron and silicate particles in its interior. According to this scenario, the core and mantle temperatures should not differ significantly. Therefore, the reason for mantle convection is difficult to explain. Recent data on the rapid accretion of planets, on the existence of magmatic fractionation trends in mantle xenoliths and in rocks of the crystall...

In-situ combustion (ISC) is an enhanced oil recovery process where heat and flus gases (combustion gases) are generated by burning a portion of crude oil to reduce oil viscosity and pressurize the system in the reservoir. Overall, in this method, air is injected to the reservoir, after the ignition process (self-ignition or artificial ignition), a combustion front is formed and moves toward the producer well. Nowadays, using metal oxide catalysts is considered as a possible and feasible route to improve the oxidat...

Along the north-eastern and eastern margins of the Siberian platform extends the foreland zone of the Verkhoyansk fold-and-thrust belt (VFTB) to the west of which is the Priverkhoyansk foredeep. On the north, the platform is bounded by the Olenek folded zone with the Lena-Anabar basin located to its south. Various authors identified a number of deformational events in the Late Mesozoic tectonic history of the region, of which the nature, kinematics and relationships are as yet poorly studied. We carried out detail...

All wind turbines have their main components (the rotor, mechanical transmission, generator) housed in a nacelle, supported by a pillar (large-sized) or a prop (small or medium-sized). Such a prop can be a guyed, a free standing, or a hydraulic one. While the former types of props require a lifting device for turbine installation and maintenance, the third type is provided with its own hydraulic system, which performs these operations. The hydraulic prop, which may have a height of 12...30 m and support wind turbi...

Pesticide use has shown the efficiency in protection of crops against pests, but also of some unwanted effects as persistence, biomagnification efficiency and impact on non-target organisms. Although their use become more conscientious and restricted in the last decades, they still could be found in different environmental compartments as water, especially due to their physicochemical properties and over use from past. The goal to increase water environment quality, opened the requirement to find optimal and eco-f...

Boggy deposits of the West Siberian Plain central are widespread covering min. 2/3 of the surface (excluding the floodplain) [1]. They are developed on all relief elements forming major wetlands, and their largest areas coincide with the I and II terraces raising above the floodplain of the Ob and its main feeders. Considering the Upper Pleistocene period, we will be concerned with MIS 3 deposits studied in the Kiryas section. In the beginning of MIS 2 (22-25 ths. years), the processes of deposition and peat accum...

Baltic Sea countries (Latvia, Estonia and Finland) are attracting more and more Japanese tourists during previous years. There are several reasons for this tendency ? the Baltic Sea region is safer in compared to Central and Western Europe and offers broad tourism opportunities. High potential exists in the Japanese tourism market in terms of rural tourism in Latvia, Estonia and Finland - in 2018 the number of Japanese overseas traveling reached 19 million, showing increase by 6% over 2017. The traveling patterns ...

The significant impact of the mining industry on the environment is associated with the storage of ore processing wastes characterized by a low potential for self-overgrowing due to wind and water erosion, lack of structure and low moisture capacity of fine-dispersed waste substances. In order to conserve the stored ore processing waste and reduce their negative environmental impact, the Mining Institute has developed a technology that ensures the formation of sustainable grass sod without applying a topsoil layer...

In 2018, the Cassini spacecraft discovered macromolecular (above 200 atomic mass units) petroleum-like organic compounds from the depths of Enceladus, a moon of Saturn. This breakthroug requires revision of the traditional geochemical correlations "composition-oil origin" according to the biogenic theory. We studied the hydrocarbon composition variations in oil samples and their change over time in the consistency of recovered oil during well exploitation on the territory of the Khanty-Mansiysk Autonomous Okrug (W...

The paper deals with petrology of granitoids from the Istekh ore field in northeast Yakutia accompanied by complex Au-Ag-Sn-W mineralization. Magmatism of the ore field is represented by the Istekh granitoid massif, a series of granite and rhyolite porphyry dikes, and rare dikes of diorite porphyry and trachydolerite. A polygenetic nature of the massif is documented, with origination of parental melts of the amphibole-biotite granodiorites and granites from the lower and upper crustal protoliths, respectively, und...

The aim of this project was to create a detailed 3D model of Permian clay laminations. Modern image processing methods and wavelet analysis were used for 3D visualization, identification of the nature of laminations and calculation of mean and interval sedimentation rates. The images used in this project are the photographs of a clay sample taken from an outcrop of ?linguloid? clays. First, two faces of the sample were sanded and polished to the shine. Then the polished surfaces were scanned and photographed. Imag...

The aim of this study is monitoring of quality of drinking water in Tirana city for physical and chemicals properties according the International standards that applied in Albania. In some case water don?t fulfill the permeable levels for drinking due to high levels of ammonium or nitrates. This situation may cause many human health problems. Samples were collect from tap and private wells water. The total of 90 analyzed samples during May to September 2018. All samples are collected in accordance with chemical ru...

The phytoremediation represents an environmentally friendly alternative to chemical decontamination of sites degraded by various anthropogenic activities. The dendroremediation abilities of some tree species can be combined with the production of the woody biomass for energy purposes. The aim of the paper was to determine the phytoextraction efficiency of total arsenic (As) by two varieties of short rotation coppice willows. The research was conducted in a pot experiment. Dormant cuttings of the varieties were pla...