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Finite Element Method is one most popular contemporary method of strength analysis. The method is an advanced method for solving differential equations, based on discretization, which means that area is divided into finite elements. Each finite element has a solution of the equation approximated by specific functions and performing the actual calculations only for nodes of this division. Finite Element Method is widely used in structural strength simulations, in which features such as deformations, displacements, ...

Mining activity represents an important source of harmful emissions into the environment and general impact on the environment. In the Ostrava industrial region this activity represents one of the most serious sources of potential risk for the environment and public health. The article deals with the problem of emissions of a mining enterprise from the point of view of air pollution and potential influence of air pollution on public health for the population. In particular it deals with air pollution impacts from ...

The main purpose of any socio-economic system is the quality of life of the population. Factor of production is dominant in the regional economy to achieve those goals. Creating conditions for the development of industrial production, is subject to state regulation, including all levels of government. However, responsible for the achievement of the final goal are also enterprises, organizations and citizens themselves. Production potential and quality of life of the population-are directly linked to the level of e...

The intensity of scientific and technical progress is the most important factor in the sustainable development of the economy, its economic and environmental security. In order to increase the intensity of scientific and technological progress in Russia was developed a state program "Development of Science and Technology" for 2013-2020. One of the main tasks of this program is "the formation of a modern material and technical base of the research and development sector." Measurement of the supply of material and t...

The research aim is to estimate the profit a forest owner can earn per full forest rotation cycle from forest stands of dominant coniferous species in Latvia, selling both the assortment of logs and biomass (BM) from final felling. The research analysed the situation in privately managed forests, composed of the coniferous species пїЅ Norway spruce (Picea abies L.) and Scots pine (Pinus syllvestris L.) пїЅ in different forest types in Latvia. The calculation of revenue from forest product sales took into account b...

The research aim is to identify a financial gain a forest owner can make from the management of a deciduous forest stand in Latvia provided that the stand is logged at the final (clear) felling age and the revenue is earned selling the wood as roundwood assortments and residue biomass or only as biomass (BM). The present research analysed the situation with forests owned by natural persons of the Republic of Latvia and identified the amounts of revenue a forest owner can earn growing deciduous пїЅ birch, black ald...

The Ukok plateau is located in the southern part of the Altai Mountains on the altitude of 2200 пїЅ 2500 meters above sea level, at the junction of state borders of Mongolia, China, Kazakhstan and Russia. Despite the severe climatic conditions, the territory was populated and developed by representatives of numerous cultures, who had left their traces up to the present day in the form of numerous archaeological sites. The archaeologists investigated the location of the majority of archaeological sites. However, wi...

The article describes program and algorithmic complex for synthesis of computer vision. This method operates as part of an automated control system for climate testing and it designs to analyze the aging of rubber products according to their visual indices. In this article the structural scheme of the system has been given. In addition, modified methods have been described. They compare the coordinates of a series of photographs, eliminate noise in the image being processed, and convert the output data of the comp...

The progressing depletion of fossil fuels necessitates the search for renewable sources of energy around the world. The reconstruction of small hydroelectric power stations is an alternative solution for the sustainable generation of energy. The objective of this study was to reconstruct a small hydropower plant in its former location. The average water flow and annual water flow were calculated, and the results were used to design a water turbine with a gear unit and a generator. An Archimedean screw hydroturbine...

The purpose of this research was to study, analyze and evaluate strategies and concepts for recycling of waste related to the rests of burning processes form fossil fuels in the energy sector in transition countries. Accordingly to the European Opinion approach the objectives in future are to reduce the fossil energy resource utilization in order to minimize the negative impacts on the environment and human health. Meanwhile in countries that largely depend in energy production based on thermo power plants the mai...

Research Objective: To develop the rationale behind the implementation of low-waste technology in the light of development goals of mining company. The goals are determining the anticipated project results that are usually divided into economic, social and environmental results. Project methodology is different under the context of low-waste technology projects. Methodological Framework is based on the interdisciplinary methods, modern concepts of waste management and recycling under the context of mining operatio...

Cereal farming is an important sector of agriculture in Latvia, which determines the development of crop farming. In 2015, 22.5 thousand farms were engaged in cereal production in Latvia. Of the total output of cereals, 64% were produced by intensive farms with an area of more than 200 ha, which accounted for a few percent of the total cereal farms. The cereal sector has developed in Latvia after joining the European Union (EU) owing to direct support payments and export opportunities. It is important to project t...

Today, sustainable development is related not only to sustainable production issues but also to a sustainable consumption. In the planning document пїЅSustainable Development Strategy of Latvia until 2030пїЅ, special attention is focused on enhancement of ecologically certified and healthy products, thus shaping the image of Latvia as a пїЅgreenпїЅ country by promotion of sustainable eating habits and cultural heritage. To position Latvia as one of the пїЅgreenestпїЅ countries of the EU, the consumers, food produc...

Fused Deposition Modeling (FDM) is one of the most used technology in the 3D printing field. There is many kind of 3D printers with different design and parameters, such work temperature, deposition speed and others. All of these parameters affect the final parts. Produced parts are made from different materials and therefore there are also different mechanical properties. So it depend what for the produced parts are designed, if there are just for design introducing or even for real use as conventional produced p...

The paper describes the possible applications of expanded polystyrene (EPS) granulate derived from recycling for the production of prefabricated building units. Test results of a new material called Polytech and its application in the construction industry are presented. Polytech construction system is based on prefabricated large-panel units. An important advantage of the new material is the volume representation of EPS granulate, which reaches up to 60%. So far пїЅ in order to keep the proper strength of the man...

The use of weak local soil as well as the recycling of existing worn-out structures such as old road pavements using micro particle road binders are a beneficial ecological solutions. Parameters of the soil stabilized with binders significantly affect the load bearing capacity and durability of the built structures. Mechanical parameters of the soil are therefore needed in the analysis and design of soil structures. Determination of the exact value of these parameters in indirect tensile test is related to the nee...

The forest is generally recognized as a major environmental and stabilizing factor in the country. Its stability is currently significantly influenced by changing climatic conditions. They are an important factor in a determining species composition of forest ecosystems, as well as ecophysiological and production processes directly linked to the overall performance and stability of forest stands. Dry summer months and warmer winters with negative anthropogenic activities actually create more favorable conditions f...

In my paper, I analyse the existing curriculum on the subject of ecological education in Romanian schools, in order to offer some practical solutions that can be implemented in kindergarten, schools, universities and also during cultural events and fairs (that I also consider an important educating factor). The abstract information taught at the higher levels of education dominate the curricula of our schools and universities, where pupils and students get very little practical knowledge пїЅ either concerning a pa...

Roundabouts are generally perceived as safe solution of dangerous intersections. If they are built correctly, number of traffic accidents is lower than in case of common intersection types пїЅ it relates also to severity of results (i.e. fewer deaths and serious injuries, and lower property damages). In comparison with uncontrolled intersections the roundabouts have higher capacity available. Czech standards and technical conditions assess roundabout capacity on the basis of calculation of capacity for approaches ...

The goal of the contribution is to elaborate the analysis and prognosis of groundwater level regime using numerical modelling to show the possibility of introducing technical measures which have to mitigate the unfavourable groundwater level regime in the vicinity of the hydraulic structure. For numerical simulation purposes a mathematical model by means of finite element method has been provided in right-side alluvium of the VпїЅh River with detailed concentration on endangered village in the vicinity of the hydr...

There are numerous technological and material solution in the building sector. As more and more emphasis is laid on the protection of nature in the contemporary world, new pro-ecological solutions are devised all the time. One of the most recent trends in the technological development of civil engineering is green technology. In the construction industry, it primarily means solutions with an aim of attaining efficient management of energy and natural resources, from production of building materials, through design...

Inertial measuring system (IMS) is a self-contained navigation system which enables monitoring of 3D position and orientation of the navigated object in indoor environment. Determination of the position and orientation of an IMS is based on integration process, where the displacement and the change of the orientation are calculated from inertial measurements (acceleration and angular rate). The measurements of inertial sensors are influenced by systematic errors, which are accumulated in the integration process. A...

In 2016, the Faculty of Geodesy aimed incumbent on goals of the Strategic Plan of the Technical University of Civil Engineering for the period 2016-2020. In light of the strategy developed by University management, the Faculty of Geodesy has identified several proposals to increase academic performance through education. One of the major concerns was reducing the studentsпїЅ drop-out rate within their first years of study. We tried to identify appropriate ways of helping and stimulating the students towards contin...

Healthy and safe working conditions underground, especially in areas with potentially explosive atmospheres depend mainly on the method of operation and management of the ventilation system. For underground extraction of coal are running a complex network mining vertical, horizontal and inclined role extraction, transportation and evacuation the surface. Associated system of mining works has the air network to ensure the oxygen necessary for workers, diluting explosive gases and toxic substances and preparations t...

At the present day, requirements to the quality of marine fuel and to the volumes of air pollutant emissions become stricter for shipping in the Arctic Region. This article states that one of the most important ways to follow the emission limits is switching the ice-rated vessels to liquefied natural gas (LNG) as fuel. As compared with oil fuels, LNG has the superior calorific value and the best physical characteristic. It is noted that Russia has a number of opportunities to apply LNG both for supply of water and...

At the Incukalns district of Latvia, two gravels pits from 1956 until 1981 were filled up by liquid sulphuric goudron (mixture of sulphure acids, oil products and other hazardous substances). These dump sites were informatively named as the Northern and Southern pools. During sixty years, the pools are polluting groundwater that moves towards the Gauja river. Waste from the pools will be excavated in the near future. However, the contaminant plumes will continue their movement. Scientists of Riga Technical Univers...

In the paper the priority directions of development of the Arctic zone of the Russian Federation and ensuring national security, and note that one of the most principal factor is the development of science and technology and international cooperation in the Arctic. For the development of Arctic science and technology, the Russian Federation conducts work on formation of competitive scientific and technological sector in the development and deployment of advanced technologies and materials adapted to the climatic c...

The Committee on Affairs of construction and housing and communal services of the Ministry of national economy of Kazakhstan approved the "Scheme of water supply and sanitation Kyzylorda", which is represented by the following decisions in choosing a water supply source. So, according to the first embodiment of the solution, the scheme drinking water supply was provided from two groundwater sources: Kyzylorda and Ky-zylzharminsky fields located on the right Bank of the city. Supply and return water was provided th...

Mineral wealth as a source of energy and materials for the needs of the economy and development must be systematically verified, protected and exploited most effectively. The protection and economic management of mineral wealth is one of the basic duties of the state.The Slovak Republic has developed a relatively complex system of legal standards and regulations dealing with this issue. Given the size of the problem under consideration and the number of regulations, these legal adjustments need to be reconciled. A...

A switch to combined automobile-conveyor transport is offered, i.e. cyclical and continuous method, at an early stage of the development of steeply falling deposits, based on usage of advantages of the safe intensive development of working zones along the steep open pit edges at a number of open pit mines on the territory of Kazakhstan. It is possible to shift from traditional approaches of cutting a new pit banks by advance of the cut trench with the minimum dimensions on the round-shaped open-pit fields. Decreas...

Problems generated by activities like mining exploatation, smelting or petrochemical refining include different levels of soils contamination with different pollutants. Having both the soils productivity and human health affected, these areas are of interest for researchers worldwide. The negative effects on the involved ecosystems and adjacent areas fully justify the current ecological and monitoring activities. Historically pollution in Baia Mare Mining Basin, like in all around mining basins, had has dramatical...

When it comes to workplaces characterized by a high degree of hazard and liability, such as mine intervention and rescue in major risk environments the most important element is the convergence of the skills required by job and skills of the individual, this being the guarantee of successful vocational selection. Along with psychological selection, training / retraining and physical training in conditions as close as possible to the reality of future interventions, under the action of stress factors that cause neg...

Since 2014 Russia has been developing and implementing a new environmental policy based on the concept Integrated Pollution Prevention and Control and Best Available Techniques. Transition to Integrated Environmental Permits is gradual: first 300 industries characterized as пїЅkey pollutersпїЅ have to obtain permits in the period of 2019-2022. They will be followed by at least 5-6 thousand industries of nearly 30 economic sectors. Within the construction materials industry sector, several older cement plants are l...

The sedimentary environments are in general very important aquifers because of the following characteristics: high permeabilities, storage capacity, the interaction with the surface waters. The exploitaition of this types of aquifers it is significant because, among other things, this aquifers are easily accessible (in general we donпїЅt need complex systems of capture and in most cases are enough wells ans/or drilling between 10-100m depth). Must of the aquifers structures from the south part of Romania are usual...

The purpose of this study is to evaluate the mineral content, total antioxidant activity and total phenolics content of pumpkin flesh and seeds from two varieties of autochthonous pumpkins Garden pumpkin (GP) and Styrian pumpkin (SP) purchased from the agricultural marketplace. The investigated samples consisting of Garden pumpkin flesh (GPF), Garden pumpkin seeds (GPS), Styrian pumpkin flesh (SPF) and Styrian pumpkin seeds (SPS) were subjected to mentioned investigations, as follows: the mineral content was analy...

Formed under various natural conditions, soils are different from each other with respect to characteristics and fertility from region to region. That is why from ancient times it has existed and evoluated the preocupation for the appreciation, choosing and using the best lands for agriculture. Dolj County belongs to the temperate climatic area, but its position and the depression character of the field which it occupies in the neighbourhood of the bend of the Carpatho-balcanic mountainous chain, determines, on th...

With the growing number of cars in Russia over the last years, the number of gas stations has several times increased, and the range of oil products has greatly changed. At present gasoline should provide reliable and efficient engineпїЅs work; it mustnпїЅt change its composition and characteristics during long-term storage; mustnпїЅt damage reservoirs, fuel related components, industrial rubber articles; should have effective volatility and hydrocarbon composition; should provide non-detonating stable fuel combus...

The paper presents the analysis of the impact of quality and organizational parameters of products using industrial waste An attempt to analyze possibility of waste processing steel in order to improve the quality and properties of products. In today of globalization and standardizations processes, products as well as diagnostic systems, extremely a fact of abilities and adjustabilities seems material to the organization of enterprise for completion of diagnostic treatments. It isn't possibile here to omit the nee...

Geographic information is a huge volume of cartographic and geographic data, which is represented by the records, coordinates and attributes. According to the Handbook [2], geographic information is fractal with very simple geometric properties, is fuzzy, because it models a part of the physical world, is very dynamic, due to the rate of change, is unique and it contains errors. The most often medium, which displays geographic information is map, no matter if it is in analogue or digital form. The whole production...

The long-term effect of economic development in post-communist Romanian urban areas brought exponential growth in motorization and uncontrolled urban expansion. As Romanian authorities still adopt conventional transport management policies, urban traffic congestion in the city of Cluj-Napoca has become a main contributor to noise pollution and air quality degradation, and has negative effects on the economy and social activities. Given the analysis of the structural and functional characteristics of the city of Cl...

Border effect is a phenomenon that adversely affects the development of the regions. It involves the suppression of links between centers, which limits the development of the areas between these centers. Each type of boundary is generating variously powerful border effect, which can be quantified as the ratio between the expected and actual power of spatial interactions. Expected power of spatial interactions is calculated on the basis of geographic application of the gravity model, calibrated by using data on dai...

A decade of improvements and new development of tools for observation statistics, standard point positioning, clock-jumps and cycle-slip detection and other interruptions over all constellations, frequencies and signals, satellite elevations and azimuths, elevation-specific histograms, satellite ascending/descending times for horizon and user elevation cut-off, pseudo-range multipath and noise, carrier-phase signal-to-noise ratio, data gaps and small data pieces and other useful lists and statistics allow us to an...

The goal of the presented study was to investigate and outline potential benefits of an integrated scientific analysis, encompassing modern automated mineralogy and largearea SEM-imaging data for the needs of multiscale geomechanical and hydrodynamical problem solving. A research was conducted on a set rock samples of a Russian promising tight gas-bearing formation, featuring nanometers-to-millimeters pore space elements, wide spectrum of mineral composition, and a complex multiscale pore-space topology. In the cu...

The research was aimed to study the pore water volume and chemical composition in the isolated core samples of the Bazhenov source rock formation taken from four different oil fields in West Siberia, Russian Federation. The approach is based on the complex laboratory methods of the investigation such as Dean-Stark and evaporation methods, the X-ray spectrometry, mass-spectrometric study (ICP-MS), water and Pfeffer's solution extracts. It was found that the samples contain three types of pore water: free groundwate...

Uranium mining is the first step in the nuclear fuel cycle to produce energy. In the nuclear fuel cycle, main steps are; Mining / Milling, Conversion, Enrichment, Nuclear Fuel Fabrication, Reactors, Reprocessing of the spent fuel and Waste Management. In the first step, there are three main methods for uranium ore extraction. These are; Open Pit Mining, Underground Mining and In-Situ leaching (ISL/Lixiviation). All forms of mining methods create health risks for people and hazard for the environment. In this study...

Nowadays, after intervals of time without rainfall, heavy rain with very high flow rates in very short time are increasingly more often. If extreme rainfall events, storm sewer networks can not take storm water flows, which frequently occurs with flood damage large, often with loss of life. Duet o the fact that rainwater flows to the emissaries in time, the water table drops. Analyzing the frequency of extreme phenomena rainfall and using climate scenarios we can adapt technical regulations related to sizing colle...

Carbonaceous material (CM) from Outer Carpathians hydrothermal veins was investigated by Raman spectroscopy in order to reveal thermal conditions of its alteration. The studied CM as being found in association with пїЅmarmarosh diamondsпїЅ confirms that the crystallization environment of this mysterious quartz variety is connected with thermally-influenced organic matter. Obtained temperatures in the range of 159 to 205пїЅC are indicative for low to medium hydrothermal conditions. Presented temperatures stay in qu...

The sedimentological sequences along the lower sections of rivers have been created by the alluviation of meandering rivers in historical times. For the rehabilitation measures (focusing on water replenishment to oxbows) with the purpose of enhancing ecosystem services, the detailed hydrogeological study of alluvial deposits and soils is indispensible. Our investigation covers the area lying between the CпїЅn-Szaporca oxbow lake system, under rehabilitation, and the Drava River, which controls groundwater flow. Th...

Today, growing number of ransomware attacks from the cyberspace is getting more and more attention as the danger of immediate closing of business for attacked organizations rises dramatically. High level encryptions used by current versions of ransomware makes it almost impossible to be decrypted in the real time and probability of production going live again for attacked organization could be low. Estimated revenue up to 1 billion USD in 2016 makes this type of cybercrime activity very popular within the hackersп...

The Holy Cross Mountains is Paleozoic massif, 120 km long and 30 km wide is situated in the central part of Poland. It is built of Cambrian to Permian rock sequences and surrounded by Triassic to Cretaceous rocks. All over the massif Quaternary sediments form spotted cover. Paleozoic rocks are folded and dissected by transversal and longitudinal faults. The deposits, that occur between the siliciclastic Lower Devonian and Carbonate Middle Devonian sediments are interesting due to numerous ore mineralization sites....