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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 ...

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 ...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

The involved geological structure of the Bilina Mine complicates mining of overburden materials and it is necessary to make movement of the large mining machines in the risk zones safe, so that they are not endangered. A lot of risks is connected with mining and some of them can be categorized as so-called uninfluenced risks. Areas broken by tectonic processes or strongly inclined layers on overburden cuts are such hazards. Those in quarrying negatively affect mining in many aspects. Due to a landslide there is a ...

Food processing wastes are the end products of the food processing industries which cannot be recycled or used for other purposes. These are the non-product flows of raw materials whose economic values are less than the cost of collection and recovery for reuse; and therefore discard as a waste. These wastes pose increasing disposal and potential severe pollution problems and represent a loss of valuable biomass and nutrients. Onion solid wastes (OSW) were used as raw material to produce polyphenol and extracts wi...

Extreme floods as severe and unusual events are associated to wide range negative consequences such as: extreme floodplain flooding; crop, household, infrastructure and economy damages; social disturbance, etc. Their negative effects in most cases tend to disaster behavior, thus of especial interest is the problem with possible mitigation and prevention measures obtaining. Parts of them are Natural Water Retention Measures (NWRM) that successfully can complement available grey infrastructure. In help of experts in...

In the plain area of Timis County, compar()ed to other regions of Romania, the phenomena specific to the cold season of the year do not have a special intensity, because the submediterranean influences make the snow layer shorter, the thickness of the layer is shorter, the periods of frost have a shorter duration and the phenomenon of blizzard is present especially on the mountain ridges. In this paper we want to highlight the abundant episodes recorded in Banat in the last ten years and the deviations of the ther...

The Prague housing fund consists of houses built by heavy prefabrication system between the years 1950 and 1990. This method of construction was characterized by considerable heat losses which, in the context of current trends, appear to be unacceptable. Ageing houses are currently being renovated. The primary goal of the reconstruction is to reduce heat losses with minimal reconstruction costs. The aesthetic value of the facades and the exterior appearance of residential buildings are neglected. The article exami...

The problem of automatic geophysical facies classification from well logs has played a crucial role in the mining industry from the 1980s to the present day. During this period, many different approaches were proposed to cope with this task; they were based on the methods of machine learning and deep learning. This paper gives a systematic survey of modern effective solutions to the assigned problem. The comparison of the approaches to the solution which are described in the works of various researchers is present...

Since 2007, eco-innovation has been a focus in the European Union. The Entrepreneurship and Innovation Programme aimed to support eco-innovation initiatives among small and medium enterprises and enhance their competitiveness. In Latvia, a small number of enterprises are engaged in the field of environmental technologies and eco-innovation. The low awareness of the general public about green growth potential limits the demand for eco-innovative products and makes the ecoinnovation sector a weak business niche in L...

C:N ratio in after-harvest residues (including straw) decides on speed and intensity of decomposition. In one-year field small-plot experiment, there were included these variants: (1) monoculture of winter wheat fertilized with 140 kg N/ha; (2) monoculture of winter pea not fertilized with nitrogen; (3) mixed culture of both these crops in 1:1 ratio fertilized with 112 kg N/ha; (4) mixed culture of the crops in 1:1 ratio fertilized with 70 kg N/ha; (5) mixed culture of both crops in 1:1 ratio not fertilized with n...

The context of the accelerated fall in global cumulated oil reserves with an increase in annual oil consumption was the opportunity for the development and production of green cars. This paper aims to study the link between the sale of ecological vehicles and its impact on the pillars of sustainable development, respectively the social, environmental and economic pillar. This way we can identify a number of factors limiting the sale of ecological vehicles. Although these factors are analyzed in other countries of ...

The current paper focuses on ways in which we can reduce pollution cause by thermosetting polymeric materials. The past years, the industry of polymeric materials has gone through a tremendous increase because of the many advantages they present. However, if these materials are not recyclable nor recycled, they can cause serious harm to our environment. Questions arise in the case of epoxy materials because currently we are not aware of any methods of recycling pieces made from epoxy or composite materials based o...

The paper presents some experimental study about fatigue properties modifications in Ni-Ti alloys on heating. The shape memory of alloys is used many times by heating and cooling and/or loading and unloading. The stability of material characteristics as transformation temperatures and mechanical behavior, during thermal or stress cycling is an important consideration in developing suitable alloys. Although shape memory alloys can be subjected to both thermal and stress cycling, it is necessary to investigate these...

In the early 80-ies near the village of Shantobe, Akmola region, a heap leaching manufactory was built. Since 1985, the manufactory processes productive solutions, and the commercial product of the manufactory is a regenerate containing up to 40.0 g / l of uranium. This product is processed at the mining and smelting factory (SMCC) in the city of Stepnogorsk to produce U3O8 uranium oxide. The share of heap leaching accounts for 25.0% of uranium according to control No. 1. But, in connection with the difficulty of ...

The light hydrocarbons and water-soluble oil components overcome geological barriers - water-resistant horizons and gas-tight layers of the earth?s crust at the macroscale - and therefore natural waters of territories with oil and gas fields have a number of specific features. The purpose of the research was to investigate the features of organic impurities in groundwater and drinking water samples in the absence of accidental spills (pollution). Water samples were taken in oil and gas producing territories of Kha...

The fauna of blood-sucking midges of the Lower Volga region is represented by one taiga species (Simulium morsmulitans Edw.), three steppe and forest-steppe species (Titanopteryx maculata Mg., Schonbaueria matthiesseni End., Boophtora erythrocephala De Geer.), and the species Odagmia ornate Mg. has a polyzonal range and is widespread. Seasonal dynamics of attack of blood-sucking midges on humans and animals has two (rarely three) peaks of activity. The nature of the daily activity of blood-sucking midges refers to...

In the given work the new velocity model of the central part of the East European craton is presented. To achieve this goal six broadband seismic stations were installed along the profile about 500 km long. To recall the velocity structure, the receiver function technique has been used. For the inversion we used Levenberg - Marquardt algorithm for both P-to-S and S-to-P converted waves along with the travel times discrepancy of the transition zone 410-660 km. Preliminary processing of the velocity sections made it...

Approaching the issue of fertilizers with organic substances of the bio stimulants class is a difficult task as the concept is far from complete elucidation. As concerned the use in agriculture of these products, legislation, research, and experimental activities are still incipient. Any substance or microorganism applied to plants with the purpose to enhance nutrition efficiency, abiotic stress, and/or crops quality features regardless of their nutrient content can be generally defined as a product with bio stimu...

Geoelectrical contrasts generated between underground voids and the surrounding materials, their vertical or horizontal development, geometry and burial depth are key elements for voids detection when investigated by electrical resistivity method from the surface. Nevertheless, the acquisition techniques, the array type selection and profile(s) deployment are equally influencing the survey results. The relations between the mentioned factors were subject to detailed analysis by constructing various synthetic model...