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The studied area is the North Dobrogea Orogen, Pricopan Massif. Compared to the other massive from the North Dobrogea, the Pricopan massif has a more rugged relief. The Pricopan massif is mostly a granite plutonic body with a lenticular shape, with the long axis (AL) oriented NNW-SSE and the transverse axis (AT). In the southern part, the Pricopan Massif is made up of diagenized sedimentary rocks, named the "Carapelit series". In the ridge area of the granite sector, there are alternations of peaks and saddles, st...

Soil erosion is a natural process that models the land surface, building large geological ensembles and erosion relief from the most trivial to the most obvious forms of erosion that gives the characteristic note of geographical landscapes. Subjected to a continuous disintegration, fragments of rock and fine particles of soil are detached and transported by the movement of diverse masses of material: blown or taken from rainwater, and then transported by streams and rivers and finally submitted along river valleys...

A prerequisite for reliable and efficient mining planning is the presence of reliable information on the spatial placement of geological indicators of the deposit area planned for mining. The integral estimation of this information is finally shown as geological study of deposit area, which directly or indirectly affects the indicators of mining and processing of mined mineral raw materials. In this article, in order to estimate the geological study of a deposit area planned for mining, its geological and economic...

Assessment of spatial and temporal distribution of groundwater recharge is critical for long-term water resource management and planning. The spatial distribution of groundwater recharge depends on the climate conditions, topography, slope, soil textural, land cover, and distributed groundwater depth. In this paper, the monthly steady-state water balance model, WetSpass-M, was applied to estimate the groundwater recharge in the Cun-Szaporca oxbow of Drava floodplain, Hungary. The model inputs data are prepared in ...

The paper presents the results of the field experiment conducted at the closed tailings facility ?Gilow?, which is located in Legnica-Glogow Copper District (SW Poland). The tailings pond had been operated between 1968 and 1980 as the primary place of waste disposal from copper processing plants of Polish copper mining industry. The dams of the pond had been built up with tailings which are impregnated with salt (NaCl) coming from underground brines. The aim of the study was to investigate the actual permeability ...

An effective method to enhance productivity of gas drainage wells in gas-bearing coal seams is hydraulic fracturing. Proppants are usually used in the hydraulic fracture to maintain its aperture, long conductivity and gas recovery from developed coal seams. In the paper the experimental results of gas permeability of the solid coal cores, coal specimens with non-propped and propped artificial longitudinal fractures are presented. The data were received for different stress conditions: effective stress varied from ...

Detailed information on soil salinization according to different indicators was obtained for the first time for Western Transbaikalia. A comparative assessment of the area of salt-affected soils in this region was made with the use of two digitized maps developed in the same paradigm, but on different cartographic and analytical source materials. According to the newly created map, saline and solonetzic soils occupy 370 000 ha with a predominance (266 000) of slightly saline soils. The area of Solonetzes proper is...

This paper presents the combined method of determining the deflection of vertical components ? and ? based on the precise levelling and GNSS measurements. In general, there are several methods, but the combined method simplifies data collecting and subsequent processing of results in comparison with other methods. Components determination was performed on the high precision levelling network in Serbia, by calculating undulation on each point, so as azimuth and length for each side of the network starting from refe...

Climate change exerts influence on water resources and runoff directly ? by altering natural factors (precipitation, temperature, evapotranspiration) and indirectly ? by induced as a result of climate change land use alterations (forests, wetlands, etc.). The report presents the methodological approach for estimation of the cumulative impact of both climate and land use changes on the availability of water resources. For calculation of water balance a Model of monthly water balance, created in the United States Ge...

Assessment of cereal plant status and other biophysical parameters, such as nitrogen uptake, nitrogen content and total amount of aboveground biomass, is important information for decision support of agronomists for correct treatment of crop management practices. Especially in in precision farming, where whole area mapping is required, this information could be provided by remote sensing as an efficient method for the monitoring of crop within field heterogeneity. The aim of this study was to verify the use of unm...

This paper aims to investigate the European bioeconomy policy and bio-based business development in Latvia both from the perspective of existing business practices as well from the perspective of students? attitudes towards setting up new businesses in view of the bioeconomic challenges. The research was based on the theoretical concepts of bioeconomics and a bioeconomy, collected examples of bioeconomic business practices in Latvia, as well as the data gained from an interview of Latvia University of Life Science...

Every year, storm surges, flooding, droughts, and other meteorological natural hazards cause major damages worldwide. Due to climate change, the frequency and intensity of these disasters will increase drastically over the next few decades. Since governments and decision makers are struggling to cope with the effects of these weather disasters as it is, implementing adequate mitigation and adaptation measures that will protect the area against current hazard events as well as future ones, is essential, especially ...

The paper deals with the inefficiency of data normalization in media stream processing applications. In the classical approaches, while building a relational database architecture, developers strive to maximize the normalization of the database and bring the business logic of the system to external applications. Normalization and business logic separation have reached their apogee in object-relational mapping systems. Telecommunication systems have their own specifics. Due to the requirements for the quality of se...

South Africa has massive Platinum Group Metal (PGM) deposits found in Bushveld Igneous Complex (BIC). Due to depletion of Merensky reef, many companies are now treating UG2 reef which has a high chromite content which has negative impact in the smelting process of the platinum concentrates. Generally, PGMs are processed by rougher followed by cleaner and re-cleaner flotation banks and the final concentrate must contain less than 3% chromite. The effect of residence time and depressant dosage on PGM recovery and ch...

Plants have been considered as materials for alternative medicine and sources of pharmaceutical drugs. Despite the therapeutic advantages of medicinal plants, some of their constituents may be potentially toxic, mutagenic, carcinogenic, or teratogenic potentials. Therefore, the aim of our study is to determine the cytogenetic and genotoxic potentials of aqueous extract of Plantago lanceolata regarding quality, safety and efficiency. The cytogenetic effects were studied by the calculation of the mitotic index, by t...

The main aim of this work was to evaluate the effect of flat (UNI) and variable application (VRA) of mineral nitrogen fertilizers (NF) on the yield of winter wheat grain using yield maps. VRA NF technologies represent a wide range of procedures and processes that are a part of precision farming. The technologies are used to optimize the applied NF dose in order to fertilize high-yield crops with regard to their nutritional needs and the condition of the land where they are located. VRA NF on winter wheat fields we...

Statistics analyses confirm that the most common reason of dam failures and accidents is overflow and seepage. The issue of seepage is related to the reliability of the sealing elements in the body and the foundation of the dams. So far, 290 dams have been built in Slovakia, of which 50 are included in the ICOLD register. Most of them have a grout curtain in the foundation. Many of these dams were designed between 1950 and 1980. Lugeon or Jahde's water pressure test criterion was applied to optimize the parameters...

The paper deals with determination of shear strength properties on the interface between different types of gravels and a woven geogrid. The shear strength was measured using large scale direct shear test apparatus with dimensions of the box of 300 x 300 mm and a height of 200 mm. The tests were executed on the samples compacted to the dense state. The density index of the sample was measured and controlled for each test. Three samples of gravels were tested: fine gravel poor graded, medium gravel poor graded and ...

Explosion prevention and explosion protection are of major importance for occupational health and safety in order to minimize losses (both human and material). This paper aims to increase the ability to evaluate intrinsically safe protection equipment by using the standardized means and the simulation based on the ignition diagrams within the equipment certification body to perform tests on low current equipment protected by the type of protection intrinsic safety intended for use in explosive atmospheres by imple...

Surface water pollution occurs due to urbanization of the environment and the growth of industries. Monitoring of the pollution? sources, regular control as well as analyzing of surface water status in small streams is a basic prerequisite for good condition and water quality in the rivers into which they flow. The functioning of the water system includes processes that affect the surface water cycle itself, the reduction of selected characteristics, the removal of toxic substances, the protection of the ecosystem...

The article analyzes the currently existing methods for determining of soil erosion degree. Using the example of the main automorphic soils of the forest-steppe zone in eastern European Russia, the possibility of using hydrophysical and spectroradiometric parameters to assess the degree of their erodibility is shown. The study used unmanned aerial vehicle (UAV) with Tetracam Micro-MCA 4 and Tetracam ADC-micro cameras with a spectral range from 400 to 1150 nm and a HandHeld2 spectroradiometer with a similar spectru...

In order to increase the accuracy of power flow (PF) calculations, the design scheme should account for load static characteristics (SC). The problem arises when calculations consider a «complex» load node featuring several dissimilar interconnected electrical receivers controlled by a single measurement unit. The process of searching for an appropriate SC of the complex load node is usually referred to as the SC identification. A large number of papers [1-6] are devoted to this problem. In general, there are two ...

The paper presents a way to increase the performance of inertial systems used to determine the aerospace vehicles' attitude based on low-cost MEMS gyro sensors. A vital role in the design process of the inertial navigation system is played by sensors distribution inside the inertial detection unit. This distribution can be different from case to case depending on the type of sensors or the signal processing algorithm used. The novelty of the proposed system consists in the using on each axis of the navigator inert...

Green economy, green growth and sustainable development are currently very often used terms. There are many international organizations intensively involved in the field of green growth and sustainable development. Green growth, according to the OECD, is a way how to support economic growth and development, while protecting natural resources, so that we could continue to use the natural resources and environmental services, on which our prosperity depends. One of its aims, especially in developed countries, is gre...

Machine building is one of the basic branches of the economy of Ukraine, the level of development of which is directly related to the environmental burden on the territory of individual regions. Snizhnyansky machine-building plant (SMP) is located in the Donetsk region. The enterprise is a part of the joint-stock company "Motor Sich" of Zaporizhzhya. The enterprise specializes in the manufacture of assemblies and parts for complete sets of aviation engine products in the shops of the main enterprise located in the...

Modern digital 3D technologies are already an integral part of the construction industry. 3D technologies include 3D scanners or photogrammetric surveying of buildings, which we are dealing with in our faculty research. The main topic of the article is the evaluation of 3D building scanning processes, photogrammetric surveying and subsequent processing of acquired data. From the acquired point clouds eventually produce project documentation of the current status of the building with minimal deviation from the actu...

In order to be framed in security classes, safes for keeping money and valuables are subject to various tests that involve hitting them with tough tools. The security class of an anti-burglary safe indicates its resistance to mechanical action, and practically indicates the time in which partial or total access to the protected goods from the inside can be obtained. A anti-burglary safe has been specially developed to protect its contents or to be resistant to external attacks. The degree of burglary resistance is...

The goal of work was the determination of heavy metals content (Zn, Cu, Co, Ni, Cr, Pb and Cd) in samples of legumes /bean/ from the chosen cultivation fields of south-western Slovakia and also to review soil hygiene of the monitored localities. Common bean varieties were collected from cultivation fields from locality Hurbanovo and villages Dolne Saliby, Risnovce and Teplicky. To exceed limits of heavy metals in the soil of all localities, established by Law No. 220/2004 and by threshold values proposed by Europe...

Correct application of nitrogen fertilizers in crop management on arable land has high importance both from economic and environmental point of view, mainly in the condition of higher spatial variability of farm fields. One of the solutions could be a variable rate application (VRA) of nitrogen fertilizers based on the management zones, which addresses site specific changes in soil properties and crop requirements. The main aim of this study was to analyze the spatial variability of two fields from crop yield maps...

Digital ecosystems are considered socio-technical clusters of adaptive applications with different levels of context awareness, adaptability, and autonomy. Applications from a digital ecosystem must solve concrete problems but have to be computationally efficient, it will have to find a balance between the freedom of a system to self-adapt and the constraints that apply to obtain a correct functionality. A new model of context is necessary to facilitate the development of adaptive applications that evolve with the...

Production activities performed by industrial enterprises involve ambient air contamination, including that with solid dust pollutants. As it is obvious from every-day practices, in most cases industrial enterprises with emissions containing a substantial fraction of solid dusts include suspended particles (TSP) in their control programs. A risk caused by an enterprise for population living on nearby territories is often assessed as per a sum of suspended particles contained in emissions; these data are also appli...

Greening creates those economic consequences that every day are increasingly in demand by the market and are used to improve the efficiency of economic processes. One of the consequences of this policy is the production of environmentally friendly products. The production of such products allows us to solve two problems: making a profit and solving environmental problems. A special accounting system is required to ensure efficient use of resources and increase productivity. Environmental-economic accounting is a s...

The paper deals with the experience of engineering geological surveys of problematic sections of motorways D47 and D2 in the Czech Republic. Into selected sections of the D47 motorway near Ostrava waste material of blast furnace slag was deposited, which proved to be very problematic. Another problem solved was the solution of surface and embankment defects of the D2 highway near the town of Hustopece, located in Moravia, where in some places there have been surface drops of up to several centimeters. In the emban...

The results of analysis of organization of conservation, reproduction and use of game fauna resources in Serbia: number, population density and amount of main species harvest, especially livestock of even-toes ungulates makes 204.3 thousand species, including European roe deer ? 83.7%, wild boar ? 12.3%, cervus ? 3.7%, chamois ? 0.3%. Actual harvest amount is 20.5 thousand species, including European roe deer ? 55.5%, wild boar ? 39.7%, cervus ? 4.7%. Total amount of fur animals is 892.7 thousand species, includin...

Unlike classical tourism, where you only need to get to the chosen place and then have a good look at it, experience tourism requires much more from visitors. "Look" is not enough. It must be borne in mind that not only eyes, but also hearing, smell, taste and touch will be employed in the search. Experience tourism is a completely new trend in tourism in the Czech Republic, but it has a history in the world. Experience tourism was originally created as a marketing tool to promote sales, see e.g. Scotch whiskey di...

Several research projects of the Department of transportation engineering dealt with the issue of recycling and reuse of various materials into the pavement structure. By recycling and reuse of road construction materials, material and natural resources savings, environmental protection and energy savings were followed. The mixture with reclaimed material, most often reclaimed asphalt pavement (RAP), is of sufficient quality for the new road construction layer and can also affect the resistance to permanent deform...

Currently, thermal methods of enhanced oil recovery (EOR) based on the use of steam-thermal effects, steam cyclic treatment of the bottom-hole zone, hot water injection, steam, and in-situ combustion are the most effective in the development of high-viscous oil fields. Steam injection becomes impossible for the fields that are located deeper than 1200-1300 m with a pressure higher than 10 MPa due to the phase state of water-steam, therefore, thermal treatment is carried out by hot water. The present study was cond...

This topic presents methodology and selected results of indirect differential measurements of discharge pressure, flow rates and pressure losses, which has been obtained during testing of specific high capacity pumping module (HCPM, prototype MCS-25-330-K), developed by Sigma Lutin, ltd., and Hydraulic Research Center in 2016. For long range transportation of water (1 km, 2 km and 3 km) in this case, classical rubber hoses with DN150 has been used, although the research team did know, that it wasn?t the optimal ch...

One of the main objectives, which must be achieved in the compound feed production process, is the alignment to the imposed regulations by European Union regarding quality, safety and environment protection. In order to reach this goal, the compound feed factories need to be equipped with high-performance installations, which be endowed with special filters that can retain particles released by cooling systems for granulated finite product, with a high degree of automation and computerization, which allows permane...

The assessment of underground behaviour below buildings will become more and more relevant because of increasing awareness to energy efficiency and renewable energy topics. Real information on ground temperatures is important for many thermal calculations, which include, among others, the calculation of heat losses of buildings to the ground or the design of subsoil heat exchanger. This paper presents the results of six-year period in situ experiment designed to monitor the ground temperature profile below a passi...

The development of computer science in recent years has enabled researchers in the field of hydraulic drive systems to address the concept of ?digital hydraulics?. Digital hydraulics refers to systems that use binary parallel-connected components or switching control elements which have discrete input values and can actively control the system. The concept of ?digital hydraulics? implies that the operation of digital hydraulic devices is based on the on/off principle, meaning that active area or nominal opening ar...

The Forest Code of the Russian Federation prescribes the rational use of forest resources (Article 114). The total area of the Arkhangelsk region, covered by shrinking trees, is the territory of 9 forest districts. The large scale of dying pine forests in the region requires the solution of the issue of the use of deadwood. Evaluation of the quality and strength characteristics of wood from dying forests will determine the way to use such wood. The main qualitative characteristics of timber in dying forests can be...

Using crop dusters at the current time constitutes an important and effective means to perform agricultural and forestry works, especially when is not possible to use terrestrial equipments, or when their use not ensure an increased productivity for optimum application of the works. So, in the case in which the excess moisture content in the soil makes it impossible to use terrestrial equipments, the use of crop dusters represents the only possibility of intervention, in order to ensure an effective fight against ...

Daylight in buildings is evaluated using the daylight factor DF [%], which is defined as the ratio of the light level inside a structure (Ei = illuminance due to daylight at a point on the indoors working plane) to the light level outside the structure (Eo = simultaneous outdoor illuminance on a horizontal plane from an unobstructed hemisphere of overcast sky). The illuminance values are calculated for the overcast winter sky with Eo=5000 lx. In the Czech republic (and many other European countries), the daylight ...

Based on the analysis of contamination of hydrosystem headraces with floating materials, we developed a system of protective facilities, including protective booms, abutments and bottom mats, guiding booms. To justify the operation of the developed facilities, automated calculations of the listed guiding and retaining facilities were performed. The main attention was paid to the experimental study of the facilities. As a result of the experimental studies, we determined values of forces in a ground sill, depending...

The paper presents the results of the study of the formation and accumulation of heptyl in wild plants from soil, contaminated by rocket fuel, at the sites of emergency falling of «Proton-M» launch vehicles in Central Kazakhstan. It has been experimentally proved that certain concentrations of heptyl in gray-brown sandy soils are not phytotoxic for Agropyron pectiniformee (1-5 mg/kg) and Artemisia dracunculus L.(1-25 mg/kg), however it can cause anatomical morphological changes of roots andleaves. The revealed sig...

The aim of the study is verification of theoretical models, previously suggested by the authors for calculating rut depth and snow compaction under influence of forestry vehicles. The study bases on methods of field experiment design and methods of statistical data processing and uses wheeled forwarder John Deere 1210G as experimental set. Field tests were conducted on experimental skidding roads with loose snow, where the snow cover depth was approximately 50 cm, and on skidding roads with slightly compacted snow...

Bolted joints are a popular and relatively widespread method of joining wood-based materials in details not only of flat roofs. However, in some types of materials used to create structural details of flat roofs (for example, the above-mentioned wood-based materials), corrosion environments for bolted joints can be created in conjunction with increased humidity. The aim of this work was to verify the bearing capacity of bolted joints in various base materials (OSB board, birch waterproof wooden plywood and poplar ...

Soil provides many ecosystem services, therefore sustainable soil management, soil protection and ability to deliver ecosystem services are major concern worldwide. The growing demand for food and fiber, increases pressure on delivery of other ecosystem services provided by soil, namely water purification and regulation, carbon sequestration and regulation, nutrient cycling and provision of habitat for biodiversity. In this context, Functional Land Management framework was developed to optimise rather than maximiz...

In drilling industry constantly arises a need for information on pressure drops in the sections of the well bore flushing system. For that, knowledge on the drilling mud viscosity is required. Drilling muds are mostly belonging to the non-Newtonian liquids, whose viscosity is characterized by the plastic viscosity and the yield point. All existing viscometers are rather complicated and expensive aggregates, poorly meeting requirements of field conditions. In the industry, the Marsh funnel has found wide applicatio...