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In microgravimetric survey it is sometimes necessary to take into account the terrain correction, which eliminates the influence of terrain relief from the measured values. The accuracy of its calculation depends on the quality of mapping terrain relief in the form of a digital terrain model. For mapping is usually used geodetic data from additional measurements carried out using a total station or GPS, and more recently Terrestrial Laser Scanning (TLS). Additional measurements increase the cost of survey, especia...

This work discusses the creation of a river flow generator, which uses as an inputs temperature and precipitation data. These input data could be an artificial series of mentioned climatic variables (especially in context of climate change studies), but when assessing the present-day state, measured data may be used too. For this purpose hydrological model and machine learning model is used. In order to increase the accuracy of the flow generation, the authors have designed and tested various variants of data driv...

Halogen derivatives of hydrocarbons - trihalomethanes (THMs), are formed in disinfected swimming pool waterпїЅ mostly when chlorine compounds are used for the process. THMs have a negative impact on human health because they are carcinogenic and mutagenic. In Poland, the contents of THMs in swimming pool water and air are standardized, the norm for swimming pool water is 100 g/dm3. Several factors can influence the THMs formation in water, but most important are processes and chemicals used for water treatment. Th...

This paper aims comparisons of data obtained by different methods of data acquisition. Will present aspects of quality data obtained with Leica total station ultra 802, with GPS equipment from Leica 1200 Series and comparison of these data with altimetry data obtained using LIDAR technology. Measurements were made in ?ag - Par?a area, of Timi? county, on a length of approximately 4 km and over a width of 50 meters left and right from the center. Using LIDAR technology we can realize 3D models, can be detected and ...

In this work, the filamentous fungus Aspergillus niger was tested for its compatibility with different media compositions, other plant growth promoting microorganisms, and plant growth stimulators. As a first step, a medium selection was carried out employing as a criterion the P-solubilizing activity of A. niger. The highest soluble P concentration of 136,92 mg/L and 394,93 mg/L was registered on Potato-Dextrose and Czapek-Dox medium in conditions of submerged and solid-state fermentation processes, respectively....

In Latvia, aquaculture is evaluated as highly productive, competitive and environment-friendly sector, having an internal self-development potential, which should be used in full. Economic breakthrough in the fisheries in the EU and in Latvia is related to aquaculture sector; consequently, facilitation of its competitiveness plays a significant role. The aim of the research is to evaluate the competitiveness of Aquaculture Sector in Latvia. Based on the author developed Model of the Factors influencing Competitive...

Present study determines conditions for titanium magnetite concentrate processing with fairly complete titanium conversion to the slag and iron and vanadium separation in the hot metal. It is quite difficult to process titanium magnetite concentrate in the blast furnaces due to low fusibility of charge and direct electrical melting causes process instability. Present work is devoted to development of concentrate double stage smelting process with little soda additions, including solid-phase recovery at the first s...

The goal of the contribution is to present a comprehensive and complex possibility of modelling the runoff processes for a given part of Bratislava city. The complex approach consisted of mutual integration of results of partial mathematical models пїЅ rainfall-runoff model, sewage system model, 1-D hydrodynamic modelling of open channel flow together with partially covered flows, 2-D hydrodynamic modelling of flooding the town residential area. All modelling works have been done in DTM coming from aerial photogra...

Fast increase of Earth population during the last decades raised a serious problem when it came to providing fresh and good quality food (mainly vegetables) in big quantity over a short period of time. Due to relatively long lifecycles of plants when growing in gardens or fields, the best solution consisted in using greenhouses. Greenhouses proved to be a very important solution since they are capable of operating regardless of local environments if minimum requirements (heating and water) are provided. By offerin...

In Bratislava, Capital of Slovakia, there is a huge development boom on the edge of the Old City, where is risen up a new complex down town of the city. The territory specified on the edge of the first ring called Chalupkova Centre will have around 20 high-rises with different function and there will be more than 20,000 parking spaces. At present, the operation of the territory is at the border of the saturation flows. There will be a new bus station and begins to reflect on the new tram routes. The extensive trav...

The article presents data management results of repair works performed in the wells with different values of bottom-hole pressure. Repairs performed during the last ten years in the wells drilled in the Tournaisian, Tula, Bashkirian, and Verey deposits have been involved into a special statistical analysis. The authors provide an assessment of possible risks for control and operation of wells with low bottom-hole pressure on the basis of their study experience. The main purpose of the analysis was to determine the...

Emissions of industrial plants contain a considerable quantity of different chemical components. These include ash, soot, smoke, sulfates, nitrates, oxides of metals and other solid components. The size of dust particles emitted by enterprises are defined by the process environment and the composition of raw materials used. Particle fractions less than 10 microns (PM10) and less than 2.5 microns (PM2.5) can penetrate to the upper and lower respiratory tract. Both short and long-term exposures of fine dust particle...

Isotopic composition of noble gases and other volatiles (CO2, N2) from minerals of corundum-bearing rocks with isotopically ultralight oxygen from Khitoostrov deposit have been investigated. The studies were conducted on Finesse mass-spectrometry system [1] using step heating in temperature range from 200пїЅ? to 1400пїЅ?. The following minerals were investigated: corundum, amphibole, garnet, staurolite. For the same samples, differential scanning calorimetry and thermogravimetry curves have been obtained. The firs...

Nowadays, we can notice a phenomenon of extreme diversification of the categories of complex and colorful wrapped food products that attract more consumers on local or world market. The current trend in the modern consumer orientation is for new food products that satisfy both nutritional and sensorial requirements and cause the appearing of new products on the food market. However, we must say that food has a complex composition, sometimes indiscernible to consumers and associated with an improper diet, poor in n...

The research claims that carbonate reservoirs are different from terrigenous one with the ability significantly to improve the filtration and capacitive properties under the influence of hydrochloric acid solutions. Acidic compositions, containing not only the hydrochloric acid, but also various kinds of additives, such as demulsifiers, dispersants, stabilizers (converters) of iron and many others. They are usually selected by experience in practice. Its main function is to simplify the extraction of the oil emuls...

The ever-increasing demand for heating in different sectors, along with more preventative regulations of greenhouse emissions, has forced different countries to seek new alternatives to heat buildings such as district heating system (DHS). DHS is best suited to areas with a high building and population density in relatively cold climates. District heating, considered as the most efficient method for building space heating, has been dramatically developed over the past decades. This paper approaches the description...

The methodology of computer simulation of nonstationary fields of temperatures, concentration and pressure is considered. The computer model of non-stationary heat exchanging process is researched. Decentralization interaction of the active parallel agents is the base for computer implementation. Agents are defined as abstraction of elements of physical system where the modeled processes proceed. Process characteristics are calculated on the base of information on non-stationary fields of temperatures of a wall of...

The article reviews and analyzes the existing computer systems and platforms for the dynamic monitoring of bee hives, through which various states of bee colonies can be detected and analyzed. Contemporary solutions are based on the Internet of Things (IoT) concept and consist of a number of different sensors that collect several types of data about the internal condition of the hive. The article proposes a new model of IoT-based monitoring system, which consists of sensors being located inside and outside of bee ...

Active mining operations in range of gaining raw material have very negative impact on the natural environment. Long-term observations proved that mining exploitation causes very significant changes in natural environment, in the region in which it is conducted. Particularly, this is applies to underground exploitation of hard coal. Underground exploitation and associated coal production cause that a lot of post-mining wastes are formed. These wastes for several years of exploitation in Poland were deposited in po...

Energy efficiency, in building industry, is one of the most important criteria for the selection of the material, the type of construction or the technology of construction. Not only is the amount of energy consumed by the building during its use is taken into account. The amount of energy needed to extract, process all materials used in it, the consumption during construction process and after it, energy expenditure on demolition or the reuse of preserved components are also important. Prefabrication is a process...

The preserved complex of forest stands of the beech up to the spruce forest vegetation level mainly of primeval forest character within the National Nature Reserve ZadnпїЅ Po?ana has been a part of the core zone of the Biosphere Reserve Po?ana within the project пїЅHuman and BiosphereпїЅ of the UNESCO organisation since 1990. Also these forest stands are being influenced to a great extent by abiotic and biotic harmful agents, which negatively affect their health and further development. Since the late 1990s, the N...

The aim of this work is the study of Congo Red removal from water by adsorption onto Zn4Al-CO3 type layered double hydroxide prepared from zinc ash. The preparation consist in dissolution of zinc ash with hydrochloric acid followed by synthesis of LDH by co-precipitation of zinc chloride with aluminum salt in alkaline media. The prepared LDH and the calcined product were utilized as adsorbents of azo dye Congo Red from water. Despite that the materials were prepared from a waste, their performances as adsorbents a...

The soil tillage system through the intensity of soil mobility influences its physical state, the capitalization of the fertilization system applied, and together they condition the water conservation in the soil, respectively the development of maize crop. The arable lands damaged by intensive conventional pratices are a cause of the loss of carbon and water in the soil, to a larger or smaller scale, according to soil, season and especially the stage of damage of soils. The purpose of the paper is the research of...

The floodplain forest ecosystems have the unique biodiversity despite of long-term human alternations of floodplain landscapes. The priorities of nature conservation in central European floodplains currently aimed to coppice and standard-with-coppice forest stands, which are relics of historical ways of forest management. This paper deals with a proposal of management strategy for floodplain forests in the Czech Republic. A management strategy which would compromise the commercial interests of production of renewa...

The atmospheric pollutants emissions derive mostly from industrial and social activities and represent a serious risk to the ecosystems and for the human health. At European level, in the recent years there has been a significant reduction in anthropogenic emissions, but certain atmospheric pollutants continue to harm the human health. The suspension particles represent a complex mixture of very small particles and liquid, with an extremely diverse composition. Along with nitrogen, the particulate matter pollutant...

This paperwork is based on the data emerged from a conducted research related to a moisture influence on ignition sensitivity of air-methane gas mixture. For the purpose of this demarche it were used method of signal processing approach as it is data filtering and mathematical transform of the experimental data. In the first part of the paper, it was presented the spark test apparatus used for the experimentation and the results of the experimental data obtained during the tests with mixture air-methane and moistu...

This article presents an analysis based on the research conducted by the authors in the rural area targeting the preferences for a certain type of investments depending on local conditions and value system. How manufacturers decide on the type of crops, endowment degree of fermentation is determined by the potential opportunities identified and estimated in a subjective manner, often under an archaic system of values. The consequences of such decisions are found in the reduced production, insufficient needs and th...

Construction of water storage lakes, necessary for different uses (irrigation in agriculture, water supply for population), implies sizing of the facility so that it can permit the transition of flood flows that could happen on the river where the water storage lake is positioned (built). Such a water storage lake is dimensioned, according to normative standards, for a flood which corresponds to a certain probability calculation. Taking into account the fact that frequently from the moment of finishing the constru...

Evolution and development of landslides is influenced by a number of natural factors (soil, geological substrate, relief, climate, vegetation etc.) and anthropogenic factors (deforestation, overloading of land with constructions, inadequate meteoric waters drain, artificial undermining of slopes-embankments for roads etc.). In this paper we propose to analyze the causes of landslides that affected the county road DJ 585 located in Visag area, Caras-Severin county limit, and also to issuing technical solutions for ...

Saline intrusion related to drought and sea level rise may result in changing of engineering properties of cohesive soils. To comprehend the variation of geotechnical properties of soils intruded by saline water, consolidation is one of the important aspects should be investigated. Undisturbed soil samples that originated from sediment in the Red River delta, Vietnam, were chosen. In the conditions that soils had been fully saturated by solution of four salt concentrations, 0.0, 9.9, 19.8 and 33пїЅ, the variation ...

The contribution focuses on the issue of realization of stoves in energy passive houses. In the context of building airtightness, implementation of the stove is considered as a significantly weak element in the construction of energy efficient buildings. Conventional stoves and fireplaces disrupt the airtightness of the building envelope. The paper describes suitable types of stoves, materials of fireplace insert, types of fuel and connection possibilities to the heating system. The attention is paid to meeting th...

The balancing devices in cable tension, DEC's, linking the extraction vessel (SKIP) and cables binding devices, DLCпїЅs, and are designed to equalize the tension in cables of extraction plant (multicable). The paper presents a new solution design of the screw-nut mechanism of initial tension cable for the uniformity tension and horizontal positioning of the rocking mechanism. The extraction vessels cables are attached to those by means of binding devices and equipment. Binding devices and equipment should be safe ...

High performance environmentally friendly aqueous adhesive nanodispersions for shoe manufacture were obtained by improving the polychloroprene adherence by chemical grafting of polychloroprene latex DISPERCOLL C 84 with methyl methacrylate in the presence of benzoyl peroxide as initiator. Grafting is demonstrated by the absence of monomer and polmethylmethacrylate in dispersions, decreasing of intensity of some bands assigned to polychloroprene as well as broadening and splitting of its C-C stretching band due to ...

The paper considers the main natural and technogenic factors forming the ecological state of the underground space and its influence on the long-term stability of buildings in such megalopolises as Saint Petersburg. Various contamination sources of Saint Petersburg underground environment, including sandy-clayey sediments, groundwater, gases of different genesis, microorganisms, as well as above-ground and underground structures, are analysed. Peculiar natural and technogenic processes, which activation or develop...

Vanadium and nickel exist in oils as porphyrin complexes. Metalloporphyrins are concentrated in the asphaltene-resinous part of the oil, while the maximum content of vanadium and nickel is accounted for by asphaltenes. Up to the present time, information about features of content and distribution of vanadium, nickel, and the types of the corresponding metal complexes in asphaltenes and resins of heavy oils and natural bitumens has a disparate and non-systemic character. In this work, composition and distribution o...

This paper aims to bring the latest information on annual calibration of measuring equipment installed in cement plants. Calibration should be certified to confirm the quality of continuous measurements, namely the measurements of plant equipment is controlled by parallel measurements with standard reference methods by an authorized testing laboratory (accredited). These types of measurements are referred to as instant annual measurements or measurements for the chimney testing. A continuous emissions monitoring e...

The area of interest (Slatinice wastedump) is located on the southern edge of the MostпїЅs basin central part (North Bohemia, The Czech Republic). The wastedump was deposited into the space of the fomer lignite openpit mine, called Slatinice. The body of the wastedump has an ovoid shape with the longer axis oriented in the NW пїЅ SE direction. The major thickness, about 100 m, reaching a dump in its central part. Monitoring wells have been realized in the area of interest between the years 2013 пїЅ 2016. The aim o...

In Polish underground copper ore mines belt conveyors are the most common transport facilities. In KGHM Polish Copper SA there are over 100 km of belt conveyors. To increase reliability of the transportation system there are built numerous ore bunkers ensuring continuity of the excavation during 5 working days of the week and on weekends, during which ore bunkers feed processing plants. In addition, some conveyors were built as reverse ones what in cases of emergency can provide alternative routes to supply ore to...

Piled raft is a recent innovative foundation. The superstructure loads are transmitted by piles and raft. It provides safe and economic foundation. In this paper, the influence of raft-subsoil interaction on a lateral behavior of the foundation was investigated. Three-dimensional models of the piled raft and pile groups were developed by ABAQUS program. Then, their lateral deflections were compared. A gap between the cap and subsoil in pile group was varied from 0.25m to 1 m. In addition, the pile spacing was chan...

Ostrava city and Karvina city has a long history of mining. Over time in Ostrava there has been a decline in mining activity. But closed coal mine may be performed in the correct disposal of heavy burden on their surroundings. One of the biggest dangers are the outputs of mine gases. If gas leaks into a confined space, there is an accumulation of gas and may result in an explosion. The article presents two cases of methane explosions, which were noticed in the Ostrava-Karvina coalfield. Such an explosion had a dev...

In order to determine the impact on the working environment and the effects of pollutants on human operators, numerous measurements were made using an experimental stand in a forge, machine building, equipped with heating furnaces, treatment furnaces, mechanical presses, oxyacetylene flame cutting equipment and mechanical saws. The paper presents the equation of technological material balance with inputs and outputs corresponding to the process of hot forging of different semi-finished products and the main pollut...

The paper presents experimental results obtained in determining the chemical composition of the base material- heat affected zone пїЅ filler material in reworking by ultrasonic welding field. The work shows the curve of the concentration of carbon, nickel, chromium, molybdenum, iron, tungsten, silicon and cobalt in the resulted material couple. There are presented differences between reworking in ultrasonic field and common welding process. The analysis of the results obtained and presented in the paper shows the ...

In recent years, the ultrasonic field has gained the attention of several authors in the area of employing it to process and interact with fruit juices as a viable alternative to the use of conventional processing technologies. The ultrasound technique main advantage, as a non-thermal treatment, is its ability to maintain juice quality whist enhancing the juice homogenization level. The aim of this study was to subject the sea buckthorn juice to ultrasonic field treatment in order to improve the its pulp stability...

The paper talks about the development of the geodetic networks using measurements of direction from the fixed points (with their coordinates known) towards the variable points (determined points). It starts from a situation that is given seven geodetic points whose coordinates are known, and an unknown point must be framed in such a network. After observation directions are carried out in three of the seven known points must be determined the coordinates of the unknown point. In order to reduce the large number of...

The paper presents an original experimental stand for measuring emissions and pollutant by-products in a casting shop of machine-building plant. The experimental results are achieved if the cast shapes forming in normal mixture and ground foundry.The work gives the calculation and determination of the coefficient of pollution and environmental indicators for the two molding processes. In order to determine the impact on the working environment and the effects of pollutants on the health of human operators, numerou...

The paper presents a new method for reconditioning of automotive parts in an ultrasonic field by reworking. Experimental results were obtained in the case of using different material couples. Using three couples of different materials, three technological metallization processes were studied: - oxy-fuel flame and wire; - three-wire electric arc - oxy-fuel flame and powder In experimental work the following material couples were studied: X30NiMoVCr11-STELLITE 12 AWS, X30NiMoCr11-TP 4000, FxMo1Si24-STELLITE 12AWS. D...

This article summarizes and analyses some of the recent developments in strategies to prevent or reduce the effects of restrained volume changes on the behaviour of concrete mat foundations. Mat foundations are usually restrained to some degree externally or internally. For the evaluation of the influence of external restraint in mat foundations, friction and interaction models are introduced. Early-age cracks due to restrained thermal contraction can be serious because, unlike flexural cracks, they can extend thr...

The paper describes the technology of controlling a new material called Polytech used for the production of prefabricated units. Prefabricated units made from a modified Polytech mortar based on expanded polystyrene derived from recycling were used to build a residential object. Prefabricated elements are load-bearing and, at the same time, insulating elements in the form of wall panels. In order to control the prefabricated wall with a lintel under realistic conditions, a control technology was suggested that inv...

Dissolving pulp is widely used for the manufacture of functionalized materials competing with cotton and chemical fibers. One of the most widespread applications of dissolving pulp is the production of cellulose acetates. To produce high quality acetates the pulp with high cellulose content, high reactivity, and narrow molecular weight distribution is required. Conventional dissolving pulp process is based on the sulfite pulping or pre-hydrolysis kraft pulping. Further processing includes cold or hot alkali extrac...

Learning cycles in experiential education show a striking similarity to the PDCA (plan-do-check-act)-cycle in corporate problem solving as stated by David Kolb already in 1974. A cooperative/dual system involving multiple rotations with the same company offers an attractive framework to enhance corporate innovation processes by integrating the enterprises with the education of students. From the beginning in 2002 the cooperative/dual study programme Production Technology and Organization (PTO) at the University of...