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This research focuses on the energy demand and the possibilities of covering the energy needs with renewable energy within the territory of Republic of Moldova. The evaluation of the alternative energy resources is extremely important as the Republic of Moldova mainly depends on Ukraine for imported energy. Developing new sources of energy will partially ensure the stability of the economy. The renewable energy will allow the balancing of the payments and will also strengthen, at least to a certain extent, the cou...

Facilities and technical systems used in coal mines have limited durability. This is the result of very difficult conditions in which they are used. In particular it applies to environmental conditions and not entirely predictable load states of these facilities. Mining machines and devices are also exposed to various types of hazards, which in many cases significantly reduce their durability. For this reason, it is very important to properly use them and supervise and monitor their work. In this respect, huge res...

This article presents an approach for managing and comparing data, concerning some main food products in Bulgaria. The source for the search of these product categories (bakery products, milk and milk products, fish and fish products and etc.) is the created relational database. The extracted data for the selected category have been grouped, compared and processed. The obtained results enable the user to present relevant conclusions for the examined time interval. This approach is applied to the data on bread and ...

The transition to advanced digital, intelligent production technologies, the creation of systems for processing big amounts of data, machine learning and artificial intelligence is caused, among other things, by the need to move to a new level of digital energetics, which ensures the interrelationship between the generation, distribution and consumption of energy resources and their effective management. The efficiency of the use of energy resources is one of the urgent problems in the energy sector. One of the pr...

In this research we investigate the significance of the CGAL library which is a source of algorithms related to computational geometry. We briefly describe the exact computation paradigm that provides obtaining reliable geometrical results. We present the advantages of using the CGAL library in terms of investigating certain parameters of geological planar structures. We show that several parameters that can be computed and attributed to considered planes and subsequent use of further statistical methods becomes p...

The central part of the East European craton (EEC) is the site of extensive mining activity. The small aperture array ?Mikhnevo? (MHVAR) monitors the weak seismic events in the distance range about 500 km. The most of them are identified as industrial explosions using the S/P amplitude ratio, day-time distribution criteria, spectral content, recurrence and clustering of events. The detailed analysis of waveform variations allows monitoring of the change in the position of the explosion as well as the subtle change...

The advancement of tracking technologies such as RFID (Radio Frequency Identification) in recent years supported the study area of shopping behavior of consumers in retailing setting has globally regained increased interest. However, only few studies have attempted to analyze consumer shopping behavior using the RFID data. The purpose of this paper is to propose the framework based on behavioral and environmental variables, which can be tested using the RFID data obtained from the recent experiment in one of the s...

The sudden and intensive variations of the ionosphere could be represented through its basic property ? electron density which is the main parameter concerning radio propagation through this part of the atmosphere. It is radio sounding as one of the main measurement methods applied among numerous methods for electron density estimation suitable for different ionosphere sub-regions monitoring as a part of the remote sensing Earth observation technics. Collecting VLF/LF (3-300 kHz) radio sounding data which reflect ...

Interferometric data processing (InSAR) for extraction of information about the Earth terrain and its changes is one of the general guidelines in development of contemporary space-based radar systems. The InSAR processing for building the digital elevation models (DEM) and terrain displacement maps includes a phase noise suppression step, which is usually performed by adaptive spectral filers (Goldstein filter). Such filters need an interferometric coherence value as a parameter, and a method of coherence estimati...

This paper describes the design of a new product, conceived by the authors, part of a research contract and of a technological transfer, from university to the industrial market. It is a low voltage class C surge-arrester, based only on metal-oxide varistors, designed for low voltage residential equipment. Located in the indoor interior connection boxes, it could protect the whole installation against any type of occurring overvoltage (pulsed or long time one). The results of the applicative research were transfer...

The paper is focused to characterize a limited assortment in the context of a set of drought sensitivity indices, grouping these indices according to the conditions they reflect (stress and / or normal) and the correlations between them. In our research, we aimed also comparing different sensitivity indicators proposed in order to identify the most appropriate index to characterize the behavior of varieties that we have studied in field experiments. The 13 varieties have been tested for 14 years between 2002 and 2...

Sustainability of energy sources and environmental protection play an increasingly important role in civil engineering design. Due to global warming, people are well aware of the importance of protecting nature, as extreme weather events are occurring more frequently. The lack of water becomes a serious problem in still larger and larger areas all over the world. For this reason, drinking and rain water reservoirs as well as wastewater treatment plants have been presently popular and frequently used structures. Fr...

The comparative analysis of approaches to the management of surface water bodies in Ukraine, taking into account the provisions of the European Union (EU) Directive on river basin management plans in monitoring surface waters using geoinformation systems (GIS). The main deficiencies of the system of state monitoring of surface waters are identified. The introduction of GIS technologies for estimating and predicting changes in surface waters is proposed to take the necessary measures for the adoption of environment...

An algorithm for extracting information on the types and subtypes of soils for each pixel of big data sets of remote sensing on agricultural lands is proposed. For this, a mathematical apparatus for constructing a multi-temporal (empirical) soil line is used. The classical soil line (SL) is defined in the RED-NIR spectral space by two coefficients "a" and "b" [2, 6, 9]. In this form, SL does not characterize soil types and subtypes. A multi-temporal soil line (MSL) is the major axis of an ellipse that describes al...

Hydraulic structure Palcmansk? Ma?a is located in the eastern part of Slovakia, on the Hnilec River. Its main function is to produce electricity and flood control. It is in operation more than 60 years. The reservoir was created by damming up the river valley by concrete gravity dam. The bedrock of the dam is formed by phyllite rocks. The results of the water pressure tests confirmed the need to build a grout curtain in its subsoil. The safety of these structures is significantly determined by the uplift developme...

The paper deals with the problem of evaluating the characteristics of information systems at the design stage. In the design of ERP-systems the most interest characteristic is not the average time, but the probability of timely delivery of different type messsages (for example, command, service, multimedia, files, etc.) from the sender to the recipient. In addition, the possibility of using the priority information management built on the basis of service disciplines of general form with mixed priorities must be c...

Nowadays the concepts of environmental ethics and environmental responsibility are mentioned more and more frequently in relation to the performance of companies. These notions can relate either to a person or to a company. Being environmentally responsible entails fulfilling one?s duty to protect the environment. Companies whose activities do harm to the environment should carry out this duty. The aim of this research is to teach students specialising in oil and gas engineering how to assess a company?s corporate...

This paper describes an analysis of concrete pavement loading while taking into account deflections and deformations. Concrete pavements are generally durable and have low demands on maintenance within their whole lifecycle. The first part describes an experimental road test section with verified material characteristics of individual pavement construction layers by laboratory and non-destructive testing. Furthermore, the position of temperature sensors in road structure is described, together with loading data an...

The Chapel of St. Kinga is the world?s largest underground temple and one of the biggest attractions of ?Wieliczka? Salt Mine in Poland. The chapel is located about 101 meters underground. The floor is sculpted in a single salt block and impressive chandeliers of salt crystals are made. In the analyzed part of the mine, in chapel?s surroundings, there are almost exclusively dry exploitation excavations, where mining works had been conducted from the 17th to the 20th century. Observations of rock mass movements and...

In the Czech Republic, mining is regulated by a number of laws and decrees. The basis of this article is the approximation of legal provisions and their quantitative expression, the legal provisions applied in the area of economical exploitation of mineral resources in our territory. The provisions of the Upper Law are based on four fundamental principles and, on the basis of these principles, the provisions regarding the economical exploitation of mineral resources can be assigned to the individual principles. Am...

The industrial revolution, dynamic economic growth and population growth in the world mainly affect to an increase in energy and material use. Ambitious premises of the climate and energy package in the European Union are justified from the point of view of protecting the environment against the growing emission of greenhouse gases. The EU countries, as the ones with high levels of economic development, have decided to realize a decarbonization policy to become leaders in this aspect on the world scale. Autor pres...

The paper presents information about the mineral resource base of the Republic of Sakha (Yakutia)-one of the richest regions of Russia in minerals and severe climatic conditions of their development, the presence of almost universal permafrost causes a particular vulnerability of the environment in mining. In this regard, the methods and results of studies of the geoecological state of the landscape in the development of Geosciences, including space surveys of mining operations, the regime of their restoration by ...

The atmospheric composition research was based on extensive computer simulations carried out with good resolution using up-to-date modelling tools and detailed and reliable input data. Extensive numerical simulations of the atmospheric composition fields in Bulgaria have been performed using the US EPA Model-3 system used as a modelling tool for 3D simulations. The extensive data base that was created from the simulations was used for different studies of the atmospheric composition. The air pollution pattern is f...

The aim of this research study is to perform an analysis of the eco-innovation trends and to identify the development opportunities in Latvia. The research methodology applied for this research study involves the theoretical concepts of eco-innovation trends and collects examples of existing and emerging eco-innovative practices in Latvia. The results of the research indicated that the eco-innovation trends in Latvia led to positive results and gave an impulse to increasing economic activities. For evaluation of L...

One of the main conditions for developing qualitative forecasts of energy consumption, as well as identifying the potential for energy conservation, is data on the energy intensity of production in industries. A regional analysis of energy consumption in the economy will help develop a comprehensive, long-term regional energy efficiency program balanced in terms of resources and costs. For Russia, this task is particularly relevant for two reasons. The first is due to the fact that the length of the territory of R...

In the recent years, the climate changes have determined the increase of the frequency of flood, and concurrently, negative effects of these weather phenomena were amplified by other factors (the deforestation, needs of the hydro technical works, etc.). Atmospheric precipitation contributes to formation of superficial runoff, or accumulates in the snow in the winter, sometimes participating during melting to form the maximum runoff. The consequences of this rainfall can be serious in terms of erosion and soil wash...

The development of advanced indoor navigation systems for UAVs has encouraged an extensive interest because of its huge potential in military and civil applications. Global Positioning System allows working in an opened space; however, Indoor Positioning Systems are necessary to work more productively in covered places. The aim of this study was to analyse the state of the art of Indoor Positioning Algorithms. This study contains a description of the most popular Indoor Positioning Algorithms. Different technologi...

Tanks have been presently used for storage of various materials and products. It can be either a loose material, or various liquid and gaseous substances. Tanks have been often used to store the drinking water or various technical liquids, for purposes of waste water treatment, etc. Rectangular tanks are rarely used compared to cylindrical ones, but still they offer several benefits, e.g. higher resistance to unilateral loading and better use of space. The rectangular tank filled by water has been analyzed in this...

The paper states continuation of the research on energy consumption of O2/N2 separa-tion process using UBE NM-BO2A capillary polymer membrane, concerning especially its utilization in oxy-combustion processes. In the paper, experimental results of basic O2/N2 separation parameters are presented. Furthermore, their analysis is performed and their influence on operational parameters of the system is concluded. On the basis of experimental results and further computational investigation, the mem-brane system with gas...

One of the major environmental problems that is currently being raised is the olfactory discomfort. At present, the odor parameter is not regulated in national legislation, rather than in the Odor Immission Directive - OID- edition of 21 September 2004. The lack of a legal framework in terms of odor immissions constitutes an impediment for health of affected population and might have repercussions also on the economic development of the areas. Odors are one of the most emerging issues related to odor immissions fr...

Aim of the paper is to explore the application possibilities of orthophoto maps and cadastre data for determination of spatial changes. One of spatial changes types is land degradation. In recent years is important to determine the land degradation and to take measures to prevent it. To carry out land degradation prevention measures, initially should determine the territories of degraded land. However, with the development of technologies and experience of land degradation assessment methods in the world, one of t...

Decreasing fossil fuel resources and the growing attention to environmental causes increased interest in alternative fuels. Currently as a liquid alternative fuels apply: methanol, ethanol, biodiesel (FAME), dimethyl ether (DME). They can be used directly, or as components of mixtures with conventional fuels. Attempts have also been made to apply recycled fuels for diesel engines. As fuel recycling used oils extracted from waste made of polyethylene and polypropylene, oil recycled from used lubricating oils and li...

Within the framework of the work, monitoring and information analysis of the development of research activities of industrial, scientific and educational organizations, Federal and regional public authorities of the Russian Federation, as well as regional research centers in the field of study of the Arctic zone in 2017 was carried out. In total, data on 589 major Russian Arctic projects were analyzed, with a total funding of more than 130 million euros. The average volume of one conditional project amounted to ab...

The pressure transducer installed in the hydraulic system play an important role for the correct work of the powered roof support. Currently, in the free market economy there are many manufacturers offering a wide range of such products, however, it is often difficult to find a solution that would meet specific requirements, for example when selecting a pressure transducer for a powered roof support. It is difficult to find an ideal transducer that would meet all the requirements for the correct operation of the s...

The article deals with determination of shear strength properties of improved coarse - grained soils using a large-dimensional direct shear test apparatus. A road embankment in front of a new bridge over the Danube River in the Komarno city will be made of the gravel improved by the cement. Aim of the analysis is determination of the shear strength properties of this improved material for optimal and reliable design of the road embankment. The shear strength of gravel was determined in the SHEARMATIC 27-WF2304 she...

A complex geological structure with the superimposed effects of over 200 years of coal mining activities is characteristic of the Upper Silesian Coal Basin, Poland. Intensive exploitation leads to deformations of the rock mass and ground surface as well. The deformation process developing in the rock mass causes an increase in strains that may result in rockbursts. In this paper the data obtained by the PSInSAR technique covering the northeastern part of the Upper Silesian Coal Basin were used. The aim of this pap...

This paper presents an analysis of air pollution in Galati, in terms of NO2 concentrations, using the results of concentration measurements from two types of stations of the national air pollution monitoring network, one urban-traffic and one urban-background. In order to determine the temporal evolution of pollution, the daily average hourly NO2 measurements for 2017, obtained from urban traffic and background monitoring stations, were analyzed. Hourly concentrations of NO2 in Galati (Romania) ranged from 2.38 ?g...

Avalanches are undesirable phenomena, represented by the sliding or floating on the slopes of mountains snow masses. The snow masses sometimes train in motion stones, rocks, and shrubs. The avalanches are dangerous because they do human victims. In Romanian mountains, avalanche victims are mostly tourists, skiers or climbers. Avalanches can also cause disasters, covering roads and blocking access to some localities, and last but not least, human victims. They are also the most unexpected and most spectacular aspec...

The article is devoted to development of the mathematical models of transfer functions in complex geotechnical monitoring in the "geological environment - foundation - building" system. It is assumed that the geodynamic objects, as well as the seasonal natural geodynamic variations occurring near the building, have a direct effect on its physics-mechanical properties (changes in the stress-strain state of the beams, subsidence of the basement, redistribution of loads, and change in natural frequencies). In this re...

Using vibration processing techniques in tilling is convenient due to design simplicity of the involved devices, as well as to efficiency reasons, such as soil compaction reduction. However, depending on the design of the agricultural machine and on the working regime, such methods can affect the environment, the comfort of the human operator and even his health. The paper studies some effects of the vibrations of an agricultural machine with an eccentric rotating mass, transmitted to the soil and to the human ope...

The aim of this research is to analyse the thermal properties of different non-traditional insulation materials with low thermal conductivity and light weight that are made from Latvian local raw materials and are ?green? or are innovative and advanced materials. The studied materials are grouped depending on the production type and possible applications as follows: ? multi-layer combination of insulation materials, incl. low-emission surfaces; ? straw, cane, hemp, and birch wood fibreboard made from local raw mat...

From the perspective of the global climate changes, the aim of this paper is to analyse the extreme events that have taken place near the Romanian harbors in the last 30 years. In order to identify these extreme events, the hindcast data simulated by a wave modelling system implemented in the Black Sea will be used. The main wave parameters simulated by a wave prediction system implemented over the entire basin of the Black Sea are evaluated together with the wind fields considering the data provided by the US Nat...

For to determinate the DNA content and analysis of cell distribution in different phases of the cell cycle, flow cytometry was used. The exact measurements of a large number of nuclei by flow cytometry, fluorescently labeled by passing a laser beam (excitation), which marks each individual nucleus by fluorescence, allows a rapid estimation of the relative nuclear content of the DNA of the analyzed plants . Approximately 0.5 cm2 of foliar tissue is harvested, crushed very well, followed by incubation of the sample ...

For to determinate the DNA content and analysis of cell distribution in different phases of the cell cycle, flow cytometry was used. The exact measurements of a large number of nuclei by flow cytometry, fluorescently labeled by passing a laser beam (excitation), which marks each individual nucleus by fluorescence, allows a rapid estimation of the relative nuclear content of the DNA of the analyzed plants . Approximately 0.5 cm2 of foliar tissue is harvested, crushed very well, followed by incubation of the sample ...

The main task of complex environmental monitoring is evaluating the state of an aquatic system and state prediction of ecosystem links under different levels of water supply, anthropogenic influence and climatic fluctuations. The paper analyzes the inter-annual dynamics of functional activity of bacterio ? and phytoplankton of the Krasnoyarsk reservoir depending on abiotic factors (reservoir filling level and temperature conditions). The data have been obtained from series of regular observations during the growin...

Within the outlines of work, based on foreign and Russian experience, the urgency of introducing small-scale generations into the real sector of the economy, including mini- thermoelectric plant (mini-TEPs) is stipulated. The main indicators that characterize the efficiency of power plants are provided. The basic techno-economic parameters of power plants, such as specific capital investments for the construction, the cost of electricity and heat, specific estimated operating costs and others, are analysed. Separa...

Diamond SP-NDE Aircraft's route from 31.01.2018 on the basis of The Aircraft Monitoring System (AMS) was presented. Data were collected by using AMS and navigational parameters were described. Peculiar aircraft route in this paper was presented. W artykule przedstawiono wybran? tras? lotu statku powietrznego. The Aircraft Monitoring System (AMS) uses GNSS technology for Aircraft positioning. Abovementioned system is operational since 2013 in Polish Airforce Academy. Aircrafts can be continuously monitored thus the...

Fa?ade, as an external finishing of a building, gives the building its original character, obtained due to the choice from variety of forms and freedom in shaping. The decision to use a particular fa?ade system depends on the type of the object, the investor's requirements and financial possibilities, and the designer's creativity. This paper?s aim is to present the procedure of analysis that leads to a choice of the fa fa?ade system for a public building, including criteria such as: cost, technical parameters, ae...

The aim of the presented paper is to analyze the 10-meter wind (U10) conditions of the western part of the Black Sea during the present and near future interval. More precisely, 10 locations were studied. Regarding the geographical location, the points of interest are located in the range 40oN to 47oN and 27oE to 34oE as follows: 2 points are near to the Ukraine?s coast line, 3 to Romania?s coast line, 2 to Bulgaria?s coast line and 3 to Turkey?s coast line. Thus, for analyzing the wind conditions during the prese...

Psychological research makes progress in associating personality traits with specific actions and behaviours, seeking individual differences in brain anatomy and physiology, in body functions and processes of self-regulation, sensation and perception, in information processing and thinking patterns, in behaviour and emotional regulation, in interpersonal interactions and many other psychological indicators. Depending on the characteristics of the work environment, various psychological indicators are involved in r...