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The present paper concretises a current assessment of the quality of the environmental components by characterizing the soil and groundwater samples in 4 agricultural areas in Romania, chosen as case studies according to the criteria of their vulnerability to climate change. The important data obtained from laboratory physical and chemical characterization of soil and groundwater samples taken from these areas, have been analyzed in close correlation with current agricultural practices identified and their local s...

The aim of this article is the studying of the "predator-prey" populations controlled interaction. The well-known Lotka-Volterra system ([1], [3], [5-15]) with control is used as a mathematical model. A complete research of this model is done: from its parameters identification to the choice of optimal control. The identification numerical algorithms are based on the Taylor series method. This method application is reasonable in this case, because right sides of the considered ODEs system can be presented in polyn...

As a result of mining activity on the earth?s surface the phenomena that have negative effect on the objects in area of influence of extracted area exist. Depending on geomechanical qualities of hanging wall and surrounding rocks, geological conditions of depositing, seam and depth of position of deposit, critical angle of influence, way and time course of mining and other parameters the horizontal and vertical movements always appear to a greater or lesser extent. They can be described by inclination, proportiona...

One of the most effective ways to interpret the geological setting of a deposit is building its 3D model. Presenting data in form of a 3D model enables quick and convenient access to relevant information, facilitates taking decisions associated with deposit management and helps plan mining operations. With a model of the geological setting of a deposit it is possible to prepare different variants of a coal mine model as well as type of mining technology, to tackle work-related safety issues and to achieve optimal ...

We consider a problem of reservoir facies classification based on well logs. The classification procedure assumes that there is a train sample, which has a corresponding lithotype for every log entry. Since the physical nature of observed rocks is very complex, there are currently no adequate mathematical models which can describe it. We proposed the probabilistic model which takes into consideration mutual stochastic dependence of adjacent log entries, which is represented by Markov networks. The characteristic f...

In this paper we present a case study on the identification and contouring of a gas deposit, placed mainly in Pontian formations. This study is based on some geological landmarks as well as the interpretation of filtered gravimetric and magnetometric data. The gas deposits determine minimum gravimetric anomalies, under the specific geological conditions of the Transylvanian Basin. Such gravimetric minimum is determined on the one hand by the rise of the salt, and on the other hand by the mass deficit within the sa...

As an effect of globalization on natural resources demand, the need for an increasingly detailed knowledge of the geological structure of a territory and of the characteristics of these resources have also emerged. This has been the context when the administrative boundaries and the specific national policies and legislation have differentiated the current knowledge of a geological unit. For the authors of this paper, the western part of Romania is the most recent case studies where the harmonization of Romanian g...

More than thirty percent of deaths from stroke, lung cancer, and heart disease are due to air pollution. Due to the current economic global situation where half of the world has no access to clean energy, furthermore, it seems highly unlikely that IC engines will go out of business anytime soon, we face the reality that our engines will continue to pump out harmful emissions. The main pollutants are particulate matter, a mix of solid and liquid droplets arising mainly from fuel combustion and road traffic. Thus, w...

For increasing the volumes of the grain production and quality it is necessary to restore and extend sowing area, enlarge the yield growth at the expense of intensive technologies of cultivation, effective selection and decrease of losses while harvesting. One of the main reasons of yield shortage is lodging of sowings. This paper compares extent of grain crops lodging. The investigation was carried out using mathematic analysis of variety features of the stem resistance for winter and spring wheat, barley, rye, t...

In this publication, we summarize, systematize and analyse data collected for studying the use of HTTPS in the public sites of banks in Bulgaria and Serbia. The scope of the study is limited to the public site of the particular bank. We examined the web sites of all 20 banks licensed in the Republic of Bulgaria and 27 Serbian banks licensed by the Serbian National Bank at the time of the survey. The survey excludes the foreign bank branches operating in the respective countries. The main objective of the study is ...

In this paper, a computational method to predict the dimensional changes in some powder metallurgy materials is used. The samples prepared from pre-alloyed iron base powders produced by atomization (< 45, 45-63, 63-100, 100-150, >150?m) were the materials analyzed in this paper. The analyzed powders were compressed in a mold using uniaxial pressing at 400 and 600 MPa with the disc dimensions of ? 8 ? 6 mm. The sintering temperature was approximately 1.150 °C for 60 and 90 minutes. The density in green and sintered...

Small and medium-sized enterprises (SMEs) use energy consulting as an important instrument for reducing information deficits when investigating savings potentials and measures for improving enterprises? energy efficiency. Since 2012, Germany has implemented a government support program to help cover the costs of energy consulting for small and medium-sized enterprises that have an energy audit carried out by a qualified consultant. This work examines the results of over 290 companies with energy balances in the pe...

Forest fires consist a continuous threat for Greece and Mediterranean countries and one of the most serious environmental hazards. Nowadays, the perspective of forest opening up as being an important preventive measure of forest protection, which is a basic pillar of a multipurpose forestry system of the Greek Mediterranean mountains, is gaining ground. The public forest complex in the region of Vria - Ritini of the Pieria Prefecture has been selected as the research area. The present investigation seeks to captur...

A generalized spectral-analytical method (GSAM) for analyzing data of various physical nature has been developed. It is based on the generalized Fourier representation of the original experimental and model digital arrays. In this report, it is used in the implementation of a resonant-impedance method for diagnosing and studying the characteristics of mechanical systems (in particular, linear one-dimensional acoustic systems with local anomalies). In the framework of this approach, the anomaly (damage) of the syst...

Vulnerability may be considered one of the most important components of the seismic risk, as it is the only one that human society may act upon in order to reduce the risk. As seismic vulnerability implies multiple dimensions, from the physical one to the social and economic ones, a multi-criteria decision-making approach proves to be appropriate for its assessment. The uncertainty inherently involved in the assessment process is addressed using fuzzy logic theory. This paper aims to assess the seismic vulnerabili...

Optimization plays a key role in various fields of science specially engineering to simplify the decision making process. Long-term production scheduling (LTPS) of open pit mines is a large-scale optimization problem to determine the block extraction sequence to maximize the net present value considering technical, economic constraints. For many optimization problems, finding the best solution is intricate and time-consuming. In such cases, a combination of mathematical methods and meta-heuristic techniques provid...

Currently there is no uniform method for the economic evaluation of construction and exploitation costs of underground structures that would incorporate not only construction costs, but also costs associated with possible accidents and damage during exploitation. At the same time, we believe that in such cases costs should be evaluated in advance, because these situations often result in catastrophes with incredibly high liquidation costs. In this paper our method for evaluation of costs of underground constructio...

In the last decade, many researchers have asked themselves whether it is possible to have a different economic model from the so-called linear one, i.e. to move from the linear to the circular economy. The linear economy is based on the concept that the goods we use must follow a life cycle consisting of three phases. The first phase consists of the extraction of raw materials (or production of agricultural products). The second phase is the transformation of the raw material into semi-finished products. The final...

Long-term production scheduling (LTPS) is an important and vital part of the planning process of open pit mines. It defines an extraction sequence of the mineralized material that produces maximum possible net present value (NPV) while satisfying a physical and operational constraints. LTPS of open pit mines is a large scale and intricate optimization problem that has been widely discussed in the technical literature since 1960s. Production scheduling problems are NP-hard and there is a need to improve the plannin...

For many times, the authors participated in the projects on designing and construction of main pipelines in the Russian north. Accumulated experience brought us to the understanding that the available methods aimed at the assessment of natural risks for pipelines [1, 4-6, 12, 13] have sufficient drawbacks. These methods base on the correlation between the registered accidents and unique landscape units or different Quaternary deposits, thus, the results are hardly comparable and poorly adapted to the GIS of other ...

The area of interest is the synthesis and study of properties of new types of hydrogels made from pelt waste, in order to recover waste from tanneries. The research paper shows that exploratory research as a starting point to obtain new polymeric complex products -multicomponent - called hydrogels, by processing organic waste with applications in agriculture. Hydrogels that are based on biopolymers, compared with hydrogels based on synthetic polymers, have the advantage of biodegradability and a low level of toxic...

The oil price crisis has changed the way how we treat our producing wells. Nowadays production intensification is not just a possible option to increase the flow rate of wells with poor performance, but a treatment we must consider for every well to achieve ultimate productivity. However, before the actual treatment a series of different steps are necessary to take, such as candidate selection, method selection, treatment planning and decision making. These steps require the cooperation of different personnel, mos...

Economic analysis was performed for a new process that will be adapted to an existing coal-fired power plant process in order to recycle bottom ash with the objective of obtaining synthetic graphite. Synthetic graphite is a valuable raw material with many industrial applications. It can replace successfully natural graphite, saving capital and environmental costs associated to graphite extraction. Bottom ash resulting from combustion of low quality lignite at a Romanian coal-fired power plant contains significant ...

One of the main geo-environmental issues of the Central Black Earth Region is the degradation of the topsoil of agricultural landscapes caused by intensive water erosion. Enhanced water erosion processes in agricultural landscapes limit, on the one hand, the possibility of sustainable agricultural production, and on the other hand, they disrupt the ecological balance of geo-ecosystems. The goal of the study was to assess the risk of water erosion of soils in intensively exploited agricultural landscapes on the exa...

The application of ultrawideband signals and large apertures provides a high detailed radar image, where a vast majority of terrain objects may be considered as spatially distributed. The examples of such spatially distributed targets are different types of agricultures, forests, infrastructural objects, which could be recognized against the background of vegetation or bare soils. Another example of a spatially distributed target are ships and glaciers against the background of the water surface. The main purpose ...

Heat exchangers are important components of cryogenic installations. The modern and advanced cryogenic systems have bulky heat exchangers, weigh tens of tons, are made of copper and its alloys, stainless steel or aluminum. The main challenge in the field is related to the need to reduce size and weight of the heat exchangers by using appropriate construction shape and modern materials. Heat exchangers used in cryogenics can be divided into three main groups: tubular, spiral and efficient or compact exchangers. In ...

In this paper will be indicated the different behaviour of buildings in Bucharest, mistakes in design and execution, state of codes and regulations in the XXth century, revealing what went wrong. Several national and international research programs were done in the past to understand the causes for the Vrancea seismicity, to study the seismic wave propagation in the region and to assess seismic hazard for Bucharest and other communities. Especially in Bucharest, high-quality seismic data were acquired obtaining a ...

Forest fires occur for natural and anthropogenic reasons. In the vicinity of settlements, forest fires occur mainly as a result of human activity. The occurrence of a forest fire is characterized by the presence of a person in a forested area (anthropogenic load), the presence of ignition sources and the process of forest fuel ignition. It is important to understand how the anthropogenic load is distributed around the locality and to simulate it using computer technology. The purpose of the work is a numerical stu...

The paper focuses on interconnectedness of human and environment with rapidly rising urban space developments in Lahore ? the second largest city of Pakistan. The city has a long history of more than 2000 years. It reflects the developmental aspects of Mughal Era and remnants of British colonial rule. From 1999 to 2011 the growth rate of the city in terms of built up area has doubled. Thus, mounting a huge pressure on the city administration responsible of managing infrastructure and slum settlements. Due to rapid...

A problem of presence or absence small changes determining on the reflecting surface during the observation session is often occurring while solving many problems of space monitoring. Examples of such problems are the ice situation forecasting, emergencies forecasting and detecting (i.e., fires, floods, landslides, mudflows, etc.), detection of forest areas unauthorized logging, forecasts of agricultural yields, analysis the sea surfaces, and many others. For reliable detection in reviewed situations, they recomme...

E-commerce involves the processes of selling and buying goods and services through the use of modern communication technologies and the Internet. The success of this form of commerce largely depends on the website through which the sales are carried out. Modern online e-commerce platforms are sophisticated applications that perform multiple functions. They are both a marketing tool that attracts customers, dynamic systems that allow interaction with the users, and the realization of transactions and a portal with ...

The paper considers previously unknown denudation-tectonic circular landforms with the diameter of 1.5-2 km, defined by us as karst calderas. These forms are presented in western Georgia, namely in Zemo Imereti Plateau, on the carbonate-terrigenous cover of the Georgian block. Endogenous-exogenous mechanism and conditions of their origin have been proposed in the paper. The integrity of the substrate cover in its local volume is violated by the stamp impact of the hearth structure on the covering of Pre-Cretaceous...

The landslide cycle of development of deep-seated landslides begins when a new landslide block is being separated from the bedrock mass. It completes when this landslide block is displaced to the level of a landslide terrace, situated on the landslide slope. The initial stress state in the bedrock mass with horizontal earth surface (before the landslide block forms) is regulated by the Mohr-Coulomb criterion. The appearing of a landslide cirque as well as the sliding basis causes the change in the initial stress s...

The study focuses on programs for optimization of ambient air quality monitoring in residential areas in a large industrial center. The method for establishing the optimal number and location of sampling points and monitoring programs has been proposed and tested. The list of the chemical compounds to be controlled was determined by using the methodology of the population?s health risk assessment and spatial analysis of exposure levels and formed risk parameters on the basis of the geographic information systems. ...

The geological material on gold-platinoid mineralization of separate regions of Kazakhstan for the purpose of expansion of mineral resource base of precious metals of the Republic is collected and generalized. In East and South-East Kazakhstan there are large-volume complex gold-platinum deposits and ore occurrences in the black-shale strata of the Paleozoic, which are characterized by a relatively low metal content, large volumes of ore and large reserves of metals that require specialized scientific research. Th...

Baikal sponges account for a significant proportion of lake zoobenthos. The filtration activity of sponges determines their important role in the processes of self-purification of a reservoir. In recent years, depression has been observed, and in some areas even the death of the Baikal sponges. It has been suggested that the negative phenomena observed in the sponge populations may be associated with an increase in the supply of various detergents and surfactants to Lake Baikal. The trophic activity of the Baikal ...

The report summarizes the results of research on the topic of the report carried out by the authors in 2017-2019 as part of the study of climate change problem. The purpose of the research is the approximate physical and cost assessment of ecosystem services of binding, long-term deposition and fossilization of excess atmospheric carbon dioxide by marine ecosystems. The object of research is dissolved organic matter (DOM) as a large reservoir of atmospheric carbon deposition in the seas of Northern Pacifica. The s...

Development of the effective education systems and their constant improvement lays a basis for stable function of any state. Economic strategy of Russia and achievement of high living standard for majority of population possible only when educational system in the country will reach international levels. It is well known, that in Russia any University must pass the rigid system of accreditation to satisfy and match federal the educational standards. The main aim of such accreditation is to test quality and depth o...

The Rostov urban agglomeration is the largest in the Southern Federal District. Due to the rapidly growing population, the number of industrial enterprises is also increased, the by-products of which are various heavy metals. Accumulation of heavy metals negatively affects the biological and enzyme activity, leads to the general soil degradation. But the most dangerous factor for plants and other living organisms is the degree of availability, which is determined by the mobility of the chemical elements. Compared ...

The aim of work was to evaluate the influence of the grown locality on heavy metal intake (Zn, Cu, Cr, Co, Ni, Pb and Cd) from the soil to the soybean seeds. The research was realised in five different localities of Slovakia using the same soybean cultivar (Mentor). The total content of heavy metals and their mobile forms in individual soils was compared with the limit values according to Law 220/2004 and the European Commission (2006). In all soil samples the determined total content of Cd and in one locality als...

The elements content (Fe, Mn, Al, Zn, Cu, Cr, Pb, Ni, Cd, Ba, Sr, V) in the tissues of fish (muscles, liver, gills) of various trophic level (bream (Abramis brama) and a pike perch (Zander lucioperca) from the Sheshma River (the Middle Volga Region, Russia) is given. A lot of different technologies, including solvent cyclic steam-assisted gravity drainage and cyclic steam stimulation, are used for oil production in the catchment area of the Sheshma River. It was shown that both species of fish accumulated Pb (musc...

Significant differences were found in the degree of penetration of 137Cs, 90Sr, and 241Am into the bottom sediments depending on the type and origin of the waterbody. In most cases, the upper 10 cm layer of bottom sediments is the most contaminated, but the degree of penetration of 137Cs, 90Sr, 241Am in it is higher than the observed values for soils. 90Sr migrates most deeply. The highest content of radionuclides is found in closed and low-flowing waterbodies, such as isolated floodplain lakes in the Pripyat rive...

The content of pollutants in the bottom sediments of coastal waters with limited water exchange characterize the total load on the water area and catchment of bays. This paper presents the definition of the total content of trace elements such as Cr, Co, Ni, Pb, Zn, V, Sr (mg/kg) and metal oxides TiO2, MnO, Fe2O3 (%). Samples were taken in the surface layer of bottom sediments of the Sevastopol Bay in 2016. The bottom sediments of the Sevastopol bays accumulate a wide range of organic and inorganic pollutants ente...

Currently, one of actual problems of exploration geology and mining, while estimating and exploiting mineral deposits, is to improve the accuracy and reliability of minerals contouring. This problem applies both to the deposit contouring in general, and to the contouring of various interested areas within ore bodies - waste rocks, various natural ore types and technological ore grades etc. In order to solve this problem, geostatistical method of spatial variable study - indicator variogram and indicator kriging is...

The paper focuses on the experimental determination of the accuracy of automatic angular targeting of total stations. The measurements were carried out with Trimble S6 HP and Trimble S8 HP robotic total stations owned by the Department of Special Geodesy at the Faculty of Civil Engineering, CTU in Prague. Accuracy of targeting was determined with use of both laboratory and outdoor experimental geodetic networks. The laboratory micronetworks were two. One was made up of 10 points with a length of sight from 1.8 m t...

The authors presents part of his case study for the implementation of ?parametric budgeting? innovation in this article, presenting it in respective construction company, focused on construction of passive and low-energy family houses on the basis of wood ? green buildings. In general, the study focuses on meeting of innovation objectives in the area of construction objects? pricing with focus on preparation of price offers for the construction of low-energy and passive building, designed for living, in the Czech ...

In the NW part of the Romania, there are geological conditions that allow to geothermal phenomena to manifest on the surface of the Earth. The limited exploitation of this energy resource is still limited by existing technologies and by the high cost of deep-water equipment. For a good image of the Romania's geothermal potential, we present, in our paper, the temperature map at 3000 m deep and the geothermal flow map on the surface. These maps were made with the Surfer program, based on the data obtained through d...

The tertiary sector of education as an area providing the highest education is an area requiring continuous development that corresponds to developments in society and labor market needs. That is why it is necessary to continuously expand the diversification of acquisition forms and methods of education in cooperation with businesses and other institutions. College of Logistics provides tertiary education in logistics. The bachelor's and master's degree programs are professionally oriented. The emphasis in educati...

Matrix metalloproteinases (MMP) belong to the family of zinc metalloprotenases, whose function is related to the metabolism of the extracellular matrix proteins. These enzymes play an important role in the development of physiological processes such as morphogenesis, resorption and tissue remodeling, migration, adhesion, cell differentiation and proliferation, as well as in pathological conditions (rheumatoid arthritis, glomerulonephritis, periodontitis, ulceration of the cornea, etc.). To the first, the most stud...

There have occurred significant changes in the world political stage over the last more than 20 years. Events of the recent decades have changed territory, economic, social, natural resource and environmental situation in Russia. Nowadays up to 70% of territory of the Russian Federation, nearly half of northern land areas of the globe are regarded as territory of the nordic region and the Arctic region. The notion ?Arctic region? (?Arctic zone?) has no distinct definition, it is frequently equated with the notion ...