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The purpose of the paper has been finding an effective numerical diffusion model able to predict the patterns of the particulate matter PM10 transported by the wind within the urban area of Craiova (major city in Romania) from the nearby ash dump produced by Craiova II Thermal Power. In order to verify this mathematical model, experimental data have been gathered during four weeks in the selected area, in different seasons and places, by using a particulate matter sampling system and then gravimetrically evaluatin...

The number of active users of social networks according to the latest Global Digital Statshot report from We Are Social and Hootsuite has exceeded three billion. This fact makes social networks the one of perspective sources of information for carrying out analytics of various kinds. The particular interest from a scientific point of view is the identification of interactions between individual actors and social groups. Since a significant part of the interactions are personal data, which are closed for general re...

In recent years, bio-economics and alternative energy sources have become increasingly important in the economic environment of the European Union. The reasons for this development are not only environmental, but also economic benefits. The Union is seeking to increase investment in alternative energy sources, thereby promoting sustainable development, new jobs and the circular economy. Alternative energy sources, also known as renewable energy are inexhaustible sources of energy that do not pollute the environmen...

Modern growing urban areas are faced with many problems, among which in the first instance may include the need for management of rainwater. The current system for management of rainwater is characterized by considerable inefficiency and ineffective and extremely functional system in the current extreme weather. In the case of an effective design of complex city hydrology, it is necessary to construct rainwater capture objects in the place where the rain falls directly. The consequence of such a process is the sub...

The international conventions regarding the climate change, namely the Kyoto Protocol and the Paris Agreement, include the recommendations for international organisations that are responsible for the supervision over the transportation other than land transport. The recommendations refer to the efforts of these branches of the economy to reduce global CO2 emissions. It has been assessed that the maritime transport is the source of around 800 Mt of CO2 per year emitted to the atmosphere. Given the forecast regardin...

The main aim of study is to propose a method to diminish the negative effects of the drip irrigation in dens soil layer (Also called: plowpan, plow sole or tillage pan) on the vegetables growing in high plastic tunnels established on the Cambic Chernozems with fine texture from north ? east of Romania. In gardening in almost all cases the water in soil provided from irrigation, especially by drip irrigation. In this condition, the soil horizon located immediately below the ploughed layer is compacted over time. Th...

Health and working efficiency of river and marine craft crews depend largely on the quality of drinking water. In this respect, autonomous water treatment systems for ships are of extreme importance, which should be efficient, reliable, and safe providing required quality of drinking water by all chemical and microbiological indicators. The article analyzes existing methods of cleaning, disinfecting and conditioning drinking water for ships. Methods of maintaining drinking water quality during prolonged storage in...

Fennel (Foeniculum) is a member of the Apiaceae family, the most cultivated fennel cultivars belong to subspecies vulgare. This paper aim is to obtain essential oil from Foeniculum vulgare (FEO) seeds cultivated in the western part of Romania and to characterize the FEO in terms of chemical composition, herbicidal and antibacterial properties. Fennel essential oil was obtained by water vapour entrainment and the chemical composition of the oil was determined by GS-MS.The herbicidal effect was studied against weed ...

The purpose of hydraulic fracturing is to stimulate the well so as to significantly improve its performance. To achieve this, a fracture is created, which is then propped open with a propping agent. The success of this process depends largely on the fracture conductivity, which is the product of the fracture width and the apparent permeability of the proppant within the fracture. After hydraulic fracturing, well productivity is definitely affected by the interaction between the proppants and the fracture surface. ...

In the protective pillar of the shaft in the mining area North Plant 2 the mining method Room and Pillar was practised on for trial from May 2014 to October 2017, which was suggested as inovation of the mining method Room and Pillar. The task of trial operation was to prove the utilization of the mining method under conditions of underground coal mines in the Ostrava-Karvin? coalfield. The principle of the mining method is leaving stable coal pillars to support the overlying layers and then extensive separation in...

The use of electricity in potentially explosive atmospheres has many features for which the issues concerning the design of electrical equipment and installations raise many difficulties. One of the significant difficulties is the implementation of conditions fort ensuring explosion protection even under the conditions of failure scenarios. For low current electrical equipment (interlocking, command, data communications, signalling) the assessment of explosion protection is often carried out by calculation using t...

Timberline and treeline ecosystems are one of the most sensitive to climate warming. The sensitivity and response of treeline vegetation to environmental changes, especially to climate extremes, are increasingly discussed. Since treeline heterogeneity appears from regional to smaller scales the approach must be improved by including time scale from short to long-term. In treeline ecosystems the height growth of tree species in the first decades of life are good indicators of adaptability to climate changes. The he...

The article discusses various methods of rock mining used in open-pit mining.The used machines were presented and attention was paid to the scope of their application and the limitations that they are subject to when mining various types of minerals. Then, the author's method for determining resistance to the mining of undisturbed soil was presented along with an example of application. On the basis of studies on the properties of the undisturbed soil carried out in one of the Polish open-pit mines, the technical ...

In the present study are presented the causes and consequences of a bacterial disease signaled to the silver carp farmed in polyculture with Cyprinids and other fish species in ponds. In the spring of 2017, the presence of a bacterial disease of the species Hypophthalmichthys molitrix cultured within the Fish Culture Research and Development Station Nucet, Romania, was first reported. The illness caused the weakening of the fish body (Fulton's coefficient = 1,6 compared to 1,9 for healthy fish) and a slight anemia...

Accurate prediction of reference evapotranspiration (ET0) is essential in water resources planning and management of irrigation systems. The ET0was determinate using the FAO-56 Penman-Monteith equation based on the weather data collected in Serbia during the period 1980-2010. The purpose of this research is to develop and apply the Extreme Learning Machine (ELM) to estimate and calculate the ET0. The process was implemented for eight input combinations in order to find the most optimal input combination for ET0 pr...

The aim of this article is assessment of the PAHs bioavailability and phytotoxicity on benzo[a]pyrene (BaP) example in model experiment with Haplic Chernozem and that spiked with various doses of BaP (20, 200, 400 and 800 ?g/kg) equivalent to 1, 10, 20 and 40 levels of maximal permissible concentrations (MPC) planted with spring barley (Hordeum sativum distichum). The main subject of this study is to research the bioindication of BaP contaminated soil in a model experiment to quantify the main features of BaP accu...

The work has been carried out during 2016 ? 2017 period, in a vineyard located in Valea Calugareasca viticultural center, aiming to developing a "smart" and "automated" irrigation system for vine, which allows the use of both rain and irrigation water with maximum efficiency, when the pluviometric water can not satisfy the water needs of the grapevine. The researches were carried out within a demonstration polygon with the T?m?ioasa rom?neasc? variety and aimed to determine the influence of two irrigation systems ...

The main objective of this paper was to assess the water quality in Siret, in the Galati area. Galati is a port town on the Danube River in south-eastern of Romania. For the purpose of carrying out these studies, water samples from ten Siret sites were taken. Water quality has been monitored between November 2016 and December 2017. Physical and chemical characteristics of water were performed. The PFP7 Flam Photometer was used for potassium and calcium ions determination. An UV-VIS Specord 210 Spectrophotometer wa...

Yenisei River is the main Siberian river, it is one of the seven largest rivers in the world and it is the most high-water river in Russia. It is known that the emergence of large hydraulic structures causes a prolonged, and sometimes irreversible, destabilization of aquatic ecosystems. The construction of Krasnoyarsk hydroelectric power station (HPS) caused global changes in hydrological, hydrochemical and hydrobiological regimes in the Yenisei River. The Yenisei River in the downstream of the HPS does not freeze...

The goal of the work reported in this paper is to describe and develop an artificial neural network (ANN) to evaluate the effect of processing parameters such as density, pressing and sintering time on microstructural characteristics including porosity and microstructure of some iron-based powder metallurgy (PM) materials. There are various methods for generating models to predict the the effect of processing parameters. The materials used in this study are prealloyed iron-based powders. The particle size of the p...

After the regression of mountain glaciers, the typical forms of morainic lake basins were created in morainic deposits at the bottoms of the Tatras valleys. During some period they were filled by alpine lakes. During Holocene, a lot of lake basins were deformed by geomorphological processes. Frequently the lakes in them disappeared. Nowadays, it is possible to identify them by precise DTM of relief despite long time interval. In this article, we reconstruct defunct alpine lake in Zelen? pleso valley, its hypotheti...

Raspberries together with blackberries and strawberries are some of the most appreciated fruits from human diets and sometimes they are recommended by nutritionists in diets or in some digestive disorders. Raspberry plants (Rubus idaeus) products could have an important role in regaining the health balance by peoples who suffer of some anemias or of those who have different cardiovascular affections as there are some intestinal disorders. This is because raspberry products contain important amounts of vitamins, mi...

Raspberries together with blackberries and strawberries are some of the most appreciated fruits from human diets and sometimes they are recommended by nutritionists in diets or in some digestive disorders. Raspberry plants (Rubus idaeus) products could have an important role in regaining the health balance by peoples who suffer of some anemias or of those who have different cardiovascular affections as there are some intestinal disorders. This is because raspberry products contain important amounts of vitamins, mi...

Geodetic education in Romania has been imposed as an economic and scientific necessity, based on the low number of specialists in the field of land surveying. The changes that have taken place in Europe and Romania since 1989, through the transition from the state to the private ownership, have had the effect of making substantial changes in property registration and cadastral plans. Upgrading and modernization the cadastre to make it multifunctional, requires a large number of specialists with a uniform distribut...

A wide range of researches demonstrated that the application of nanotechnology can improve the performance of other traditional construction materials, such as concrete, steel, glass, paint, coatings, insulating materials, et. al. Noteworthy improvements in concrete strength, durability and sustainability are being achieved with considered use of metal/metal oxide nanoparticles and engineered nanoparticles (carbon nanotubes and carbon Nano-fiber), and environment-responsive anticorrosion coatings formed using Nano...

The article considers modern operating systems for increasing energy efficiency at the municipal and regional levels. Present successfully applied practices in other regions are given. The essential distinctive features of the proposed system for the Belgorod region are revealed. Described, developed methods and algorithms for managing energy con-servation in the budget sector. The structure of complex interaction of the developed modules used in the created software component is offered. The regional and municipa...

This paper discussed the effective application of heat exchange equipment the main areas of modern economic/domestic activities. Conclusions are made about the positive role of timely cleaning of heat exchange equipment and its impact on service life, saving money for expensive repairs and replacement of this equipment. The existing, practical methods of cleaning heat exchangers are analyzed. The key principles of developing an eco-technological business of chemical cleaning of heat-exchange equipment are consider...

This paper presents analyzes of volumetric density based on the results of experimental sampling at one of the Cu-Ag LGOM deposits. These analyzes were carried out in order to assess a value of this parameter in chosen 3 of 9 individual lithological units (streaky dolomite, dolomitic shale and carbonate sandstone).The selection of individual lithological units was based on the number of samples taken and examined in particular lithology. An attempt to determine the structure of variability of volumetric density wa...

The paper is devoted to a research of ice cover parameters intra- and inter-annual variability along a section of the Northern Sea Throughway due to the global warming. The standard sailing route is situated between the Sabetta seaport (the Yamal Peninsula, Russia) and North Cape (Norway). The natural gas liquefaction plant in the Sabetta City is one of the largest ones in the world, and the liquefied gas producing is increasing. Now there is an imperative need to provide hydrocarbons marine transportation from oi...

Poland's membership in the European Union obliges us to implement the rules binding in the Member States and to the preservation of the principles of sustainable development understood as the integration of economic, social and legal activities through the implementation of new technologies for environmental protection. In order to fulfill the obligations arising from the Directive of the European Parliament and the Council 2010/31/UE of May 19, 2010 on the energy performance of buildings, from January 1, 2017, ac...

Hyperspectral images and field spectroradiometer with high spectral resolution can improve substantially crop mapping by reducing similarities between different crop types which has similar ecological conditions. This is done by recording fine details of the crop interaction with sunlight. This paper deploys crop spectral signatures database interactive tool for the major crops in the Eastern Mediterranean Basin. The collection of spectral signatures of crops is performed during the growth stage of the crops. The ...

The article discusses the features of formation and distribution of groundwater in the north-western slope of the Moscow artesian basin in the European part of Russia. Location of the north-western slope area is based on ecological-hydrogeological zoning. The aim of the case study is to examine the anthropogenic impact on groundwater resources and quality for two main aquifer systems of the Moscow artesian basin: Gdov aquifer and Intermorainal aquifer system. The investigation based on analysis of groundwater moni...

The Plan of Economic and Social Development is a basic and medium-term developmental document for the local self-government in which environmental policy is focused on the quality of citizens lives. The cities and the municipalities through the Plan of Economic and Social development, express interest in their future, as well as the future of their residents. The self-government is getting with the mentioned document a tool for an active developmental management based on initiating of the necessary and desirable c...

The main objective of our studies undertaken is to determine the causes of the increased degradation of the soil from upper terraces of Moldova's river catchment. In the studied area from the western part of the Suceava Plateau (North-Eastern Romania) was built in 1978-1980 with a drainage network consisting of channels and underground drains. These works have been associated with leveling, deep loosening, mole drainage and liming. The studied settlement is located on the terrace platform with an average altitude ...

In the paper, the comparative analysis of results of the research concerning energy con-sumption of separation process and influence of operational parameters is presented. Results are acquired basing on experimental and computational research. Scope of the analysis is stated within cascade system with lack of gas recirculation and membrane system with gas recirculation. Investigation is performed using UBE NM-BO2A capil-lary polymer membrane. In the paper, operational characteristics of compared systems, obtained...

An electrohydraulic control system as a part of powered roof support is required to be equipped with a safety valve. The aim of the valve is to protect the roof support against overloads that may damage hydraulic legs, and subsequently lead to loss of stability of the whole support unit. In order to select optimal operating parameters of the safety valve it is necessary to carry out tests in conditions similar to those in the mine. The tests should reflect the actual load condition of the support as much as possib...

The goal of this project was to create a detailed model of the Aral Sea sedimentary cycles. Modern methods of image processing and wavelet analysis were used to reveal the nature of lamination and determine the average and interval sedimentation rates. The results obtained were then compared with those from the radiocarbon dating. The images used in this project are photographs of core (sediment) samples taken with hollow plastic tubes. The samples were removed from the tubes by cutting them in half lengthwise, an...

The paper presents the hazards related to invasive plant species in the area of the Mszana community, located in the Silesian Voivodeship in southern Poland. The community is of an industrial-agricultural nature. Its surface area is approx. 31.3 km?. Settlements are focused along the main roads and transportation routes. Influence of mining activity is clearly visible in the area in the form of coal waste dumping grounds, subsidence troughs and fens. Approx. 70% of its surface is occupied by arable lands, while 7%...

The materials from are realizing the electric line conductors are great consumption of electrical energy, and at the selection conductors will must allow flow of immersed energy in material and are comparing by the electrical energy losses from life duration the electrical distribution networks. In this context appears the notion of ?optimal current density in terms of energetic? or easier ?energetic current density?. In first stage result that must to choose a solution which to give in final at the conductor mate...

Under the current conditions of the functioning of agribusiness entities, forecasting of agribusiness development is of great importance. First of all, it is related to the fact that the Republic of Mari El belongs to the agroindustrial region. In addition, the enhancement of the integration processes is observed at the present time in the Republic of Mari El and new forms of integration of the economic entities of agribusiness are formed due to these processes. The formation and development of the competitiveness...

General topic of this paper is numerical modelling of pollution dispersion in streams and use of some modelling approaches for the inverse task. Inverse task means a modelling technique, which is focused on the localisation of unknown pollution source. Such task is called ?inverse ?, because typical common models or equations are rather focused on the pollution spreading simulation, whereas the pollution source location is known. To solve such inverse problem various approaches can be used, but in all cases a prer...

The investigated lead - zinc ore panel is located in the Blaznei Valley ore deposit, Romania. Applying traditional methods for determining the average thickness proves useful in its exploration, although there are only four points of thickness measurement, located in each corner of the exploration panel. Later, in the second stage of the exploitation process (preparation), when the exploration panel becomes an operating (exploitation) panel by contour mining of four workings, two groves on direction and two runs, ...

Oil and gas exploration in Bulgaria has been mainly conducted in Northern Bulgaria. Up to 2500 boreholes have been drilled on the territory of the country so far with a depth of several hundred meters to more than 6000 m. During drilling, groundwater with different hydrochemical properties, often with high total dissolved solids (TDS) and contents of a number of elements, have been registered. After the completion of the drillings, many of them have not been liquidated, as in some of the boreholes artesian water o...

Studies were conducted in an intensive fruit-bearing apple orchard in the South of Russia in the Chechen Republic. Layout scheme - 3,75?1,5 m, the formation of trees - a slender spindle. The object of study were apple cultivars Renet Simirenko (control), Granny Smith, Florina (M9). The main soil cultivation (autumn plowing) was carried out once in 3-4 years by garden plows or plows-lushmen at a depth of 14-16 to 18-20 cm in row-spacing and 6-12 cm in the trenches. Cropping blocks in an intensive garden with dwarf ...

Modeling is used to predict the effects of chemicals at the a global or regional scale. Several models have been developed that describe the fate of chemicals in the environment, which are used to assess the mercury footprint of a country or even entire regions. For example, the following models are implemented in the form of software packages: CalTox, BETR, USEtox and others. However, imminent studies and models practically do not evaluate the spatial differentiation of the residence time of chemicals in the comp...

For the analysis of polyoxometalate functionality (POM), a bioassay was developed in order to determine the effect of the functionalized porous ceramic granule (with POM) on the germination of tomato plantlets (Lycopersicon esculentum) and cowpea (Vigna unguiculata). After 3 days of incubation under dark conditions at room temperature in the case of cowpea seeds and 6 days in the case of tomato seeds, the germination process was calculated and the radicle and hypocotyl growths of the obtained plantlets were biomet...

The importance of this topic is derived from the fact that the agricultural production takes place under the influence of a complex of environmental factors and conditions modified in time and space by human intervention, which requires the knowledge of all ecological determinants in terms of their productive capacity in order to choose those more appropriate crops and technological measures for their sustainable management. The purpose of the researches is based on current scientific and practical preoccupations ...

The paper presents a patented and copyright protected concept of constructing a shaft lining that goes through salt rock massif having strong rheological properties and being susceptible to leaching. In the case of salt layers, especially on significant depths (over 1000 m) the relative convergence of the heading contour may amount even to 0,18 m/year. That results in the fact that any other method of securing the shaft lining, e.g. by making it flexible, will not be sufficient to ensure the stability of the shaft...

The hazard of tecnogenous earthquakes caused by mining of mineral deposits is increased if they occur at economically developed regions with ecologically dangerous objects. A deep coal mine of the Sinvay deposite in China is an example when seismicity due to mining was an important factor influencing both the mining conditions and ecological environment. At a more than 1000m mining depth the power of rock bursts rose to 107 J and they manifested themselves as minor earthquakes on the earth surface. The increasing ...

A geographical location, an atmospheric circulation, a terrain sculpture and the presence of water reservoirs determine thermal conditions in Poland. The influence of these factors overlaps an impact of local factors as well as the effects of air transformation as a result of the process of an energy exchange at the interface between the atmosphere and its surface. The thermal conditions prevailing in a specific area can be determined on the basis of average values and extreme air temperatures. These characteristi...