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Research objective: To develop methodological technique for the assessment of change patterns of the effectiveness of oil recovery depending on the size of already exhausted sections and stress-strain performance of oil reservoir. The experience of oil development shows that configuration (size) of operating area as well as flow coefficient of oil reservoir are considered to be within the key factors determining the rate of oil recovery, regime and parameters of injection and pumping as well as the design of well ...

The seismicity of Romania is significantly affected by earthquakes produced by the Vrancea seismic source with intermediate depth events (3 shocks/century with magnitude Mw greater than 7.0). The seismic activity on the Romanian territory consists of both shallow and intermediate-depth earthquakes. The crustal seismicity is moderate and more scattered in comparison with the intermediate-depth one. The recent upgrade of the seismic network in Romania with high dynamic range accelerometers ( 114 real time seismic st...

Large rotary drum machines are often used in technological lines for continuous production. These are complex structures which during operation are exposed to stresses and deformations under the influence of temperature and stress. To determine the geometric parameters of such units in this paper we propose to use a total station. The basic idea of the method is remote real-time geodetic measurement of the machine parameters in the reflectorless mode. The task posed is solved by simultaneous measuring of the point...

?eskпїЅ st?edoho?пїЅ Mts. area has long been modeled by geological activities including landslides. Near the city T?ebenice there are several active landslides, one of them is exceptional because its long-term activity disrupts just two linear constructions, both road and a railroad. Therefore the landslide was intensively monitored in the past several years and is quite well mapped thus. The aim of this paper is a realization of special geodetic measurement suitable for the landslides monitoring. The system of me...

VRAGEO Project - Integrated Seismic Hazard Information Platform for Vrancea Zone Surveillance Through Advanced Geospatial and In-Situ Methodologies пїЅ have as main objective to enable free and open access to seismic hazard information in Romania due to Vrancea source in support of GMES (Global Monitoring of Environment and Security) through the development of an operational framework, a set of supporting tools and advanced geospatial surveillance methodologies of Vrancea tectonic active region. Information derive...

The article deals with the treatment of terrain and the following forestry reclamation in the Erv?nice area situated near the city Most at the foot hills of Ore Mountains. It considers the impal of using secondary energy products for the reclamation of this previously mined area on ground water, surfac ewater, air and noise. The area had previously been used as sands and gravel waste disposal and in the last years efore there clamation there had been some natural restoration of the biotopes on the brought sands ub...

According to the European Commission, critical raw materials are defined as пїЅthose which display a particularly high risk of supply shortage in the next 10 years and which are particularly important for the value chainпїЅ. Therefore, when considering a raw material criticality, two main parameters are taken into account: its economic importance and supply risk. Technologies which a decade ago were considered high tech became current today, and raw materials once considered as minor, have gained importance. Parti...

South Africa host massive deposits of Platinum Group Metals (PGMs) in the Igneous Bushveld Complex. These deposits have been mined for a long time and in the process Mine sludge has been produced. It has been piled up and there is need to recover PGMs locked in it. The conventional way of processing PGMs has proved to be very difficult due to ultra-fines in the sludge that causes major loses during flotation. An alternative hydrometallurgical process for recovery of PGMs from a mine sludge by leaching using a mixt...

The aim of this study is to explore the possibility of recycling waste materials of brick aggregates (BA) and demolition concrete aggregates (DCA) in the self-compacting concrete (SCC), by studying these fresh and hardened properties. A reference mixture based on natural aggregates (NASCC) and six mixtures incorporating recycled brick aggregates (BASCC), recycled demolition concrete aggregate (DCASCC) and combination of recycled brick and demolition concrete aggregates (BDASCC), as replacement of natural aggregate...

The foundry sand wastes (FSW) are likely to constitute as raw material for the manufacture of cement mortars or concretes at a low cost. For this reason, present work has main objective to use the foundry sand wastes in self-compacting mortar as a fine aggregate (by a partial sand substitution). An experimental tests were carried out to evaluate fresh (slump test) and hardened (bulk density, compressive and flexural strength and elastic modulus) properties of SCMs based on FSW. The Natural Sand (NS) is substituted...

Scientific researches performed as part of grant funding of the project focused on solving a global problem related to saving resources and the environmental protection resulted in the development of an innovation technology of gravity and flotation beneficiation for gold-bearing man-induced sediments of near-surface strata together with allied veined masses within crude ores mined selectively at the West Kalbinsk metallogenic zone in Kazakhstan. Stage separation of a mixture consisting of arsenic carbonaceous man...

Due to the increased demand and supply shortage, neodymium is listed as critical raw material of the strategic importance in many countries in the world. From this point of view the researches for the development of recycling technologies for this metal are strongly justified. The paper presents the results of laboratory research on the hydrometallurgical recycling of neodymium from hard disk drivers (HDDs). Neodymium magnets are the elements of a positioner which drives the head of the HDD. The study material- si...

The article summarised course of activities in trachyandezit (Latit) quarry (tephrite) in Bra?any location starting from mining working permit phase until termination of activities and subsequent redevelopment and reclamation of quarry residual pit. Redevelopment and reclamation of territory after mining is one of the main activities of Severo?eskпїЅ doly a.s.The paper provides data on the Bra?any opencast mine, namely the geography, environmental situation, climatic, hydrologic, geological and hydro-geological co...

The process of reduce smelting of antimony concentrate to produce a rough antimony in 800-1000 пїЅC are studied. The possibility of obtaining rough antimony by melting without slags and melting with slag-forming fluxes are shown. Analysis of feed and product recovery was performed by atomic absorption method on devices Perkin Elmer 240 FSAA, as well as the method to photocolorimetry on SPEKOL 2000. Thermal analysis was performed on derivatograph Q-1000/D system F. Paulik, J. Paulik and L. Erdey firm "IOM" (Budapes...

This article presents the thermodynamic properties of an ecological alternative which can be used in an air-water heat pump. The experimental setup is located in a studentsпїЅ Laboratory of the Technical University of Civil Engineering Bucharest and uses three types of energy sources: the ambient air, the sun and electricity, for hot water production. This paper focuses on the natural alternatives: hydrocarbons and their mixtures. None of the above refrigerants is perfect; they all have both advantages and disadva...

The paper is devoted to the performance of a new combination between a classical closed center hydraulic feedback steering unit and an electrohydraulic servo system based on the modern generation of digital servo valves. This type of combination may represent a solution for autonomous agricultural machinery based on the high-level technologies. The research is generated by increasing world population requesting more supplies on one hand, and the obvious decreasing of rural inhabitants, augmented by the translation...

In this contribution, the authors describe a novel method of visualizing any 3D object into a 2D seamless picture with the use of cartographical principles. The method uses properties of a sphere with reflective inner surface, in which a 3D object and capturing camera are placed. A sphere surface is consequently unfolded using cartographic projection allowing to see the whole object in 2D. The method can be applied to any objects, preferably those of non-human origin, e.g. trees with leaves, cave systems, EarthпїЅ...

Ecological problems are nowadays of general concern. In particular, much attention is being paid to the problems of population growth and this has led also to an increase of interest in mathematical models for ecology and bioinformatics. There are a lot of strong interventions in all types of ecosystems and there are a great concern for ecological security and food safety all around the world. For this paper, we specifically track the behavior for natural and non-natural dynamic terrestrial eco-systems. It is an i...

Geoid is an equipotential surface of EarthпїЅs gravity field, which partially coincides with the mean sea level and extended inside continents. In the gravimetric geoid determination; global geopotential models (GGMs), digital elevation models and terrestrial gravity observations are combined in a proposed technique (e.g. Remove-Compute-Restore). The external Earth's gravity field is represented by a GGM that consists of the globally and homogeneously distributed terrestrial and satellite gravity measurements. Cur...

Models for resource and environmental management should be as specific as possible, but complex, regional environments are highly variable and not readily compared, as would be desired for decision support. This paper presents selected tools to improve the transparency and quantitative character of modelling procedures and databases are presented. These methods are largely related to existing procedures for regional relative risk ranking, but also include system structural analysis and risk classification. Several...

The report is dealing with the categorization of the agricultural landscape. Present classificatory systems of the landscape were analysed as the source material hereby, in preference, were soil, geographic and production specifics of individual Slovak region considered. On the background of vector data on extension of the soil-ecological regions of Slovakia using geographic information systems, it was possible to detach five types of agricultural landscape on the base of real production parameters of the individu...

Studying of regularities of forming of fresh underground waters of the Akmola region of Northern Kazakhstan allowed to reveal the main regularities of distribution of fresh underground waters against the background of waters of the raised mineralization. The role of tectonic violations in forming and distribution of underground waters influence, and also influences of a lithology of the water containing deposits on nature of circulation and the chemical composition of underground waters is established. Distinction...

The trace element composition of endorheic saline lakes (with total dissolved solids varies from 1 to 590 g/L) of the Altai Region (Russia) is of undoubted interest from the point of view of their mineral resources. Among the trace elements in lake waters, high content of boron (up to 78 mg/L), bromine (up to 820 mg/L), lithium (up to 3.6 mg/L), strontium (up to 13 mg/L), iodine (up to 6.3 mg/L), and arsenic (up to 0.6 mg/L) have been determined. The content of uranium in the investigated lakes varies over a wide ...

This paper presents a research which consists in measuring potential energy which be obtained on the surface of water in motion and showing the phenomenon of пїЅwavesпїЅ monitoring in the Black Sea basin. For this were measured, processed and analyzed the amplitude of the waves, the frequency and the waves direction, more than 12 Mm shore, isobath of 50 m, to the coastal zone. There are described techniques and measurement accuracy durring one year. Also, are presented monitoring and processing data with graphycal...

The scientific paper proposed deals with the reliability analysis of the average usage time of the brake pads as components of the braking system of the industrial front-end loader and transporter machinery used in mining operations in Romania. The research was conducted at the request of several mining companies in Romania, that are using the front-end loader and transporter machinery in their daily operations. The study is based on the empirical information and the preliminary reliability results that were recor...

The Internet and computer networks development led to the development of data acquisition and monitoring systems, becoming nowadays a necessity. This paper proposes the development of applications to monitoring parameters, both local and remote; the parametersпїЅ values are derived from a micro-weather station. Two interfaces are implemented for monitoring parametersпїЅ values: the first one is a part of a wireless sensors network (named eKoView), and the second one is implemented in C# and running on a color oper...

This study focused on developing a multilevel system of spatial analysis of different types of data to model forest cover. We built a map of forest growth conditions using field data, climatic and morphometric parameters. Landsat images were classified with the help of a forest inventory and field database in order to map of current forest cover. Using Knowledge Engineer Module (ERDAS Imagine), we developed a knowledge base intended for modeling forest regeneration series from a spatial combination of the maps of ...

In this paper we will describe a novel approach for forest management that includes remote sensing based monitoring, simulation and planning. When we think about sustainable forest management, it is important to know the vital facts about the forest, especially the annual increment of the timber volume for each forestry unit. A terrestrial census could deliver the required information, but it is too expensive to be carried out frequently. The alternative is a census based on remote sensing data. In this area we ob...

Using remote monitoring methods, including aerial remote sensing, UAV and LIDAR (remote sensing, 3D UAV imagery and LIDAR) for high-resolution investigations of waves field characteristic parameters near the seaports, gives us the support information for decision making process. Therefore the results obtained in near real-time are useful to create optimal resolution maps for waveпїЅs reflection, refraction and diffraction, depending on necessities. In this paper is evaluated the possibility to monitoring and mappi...

This paper reports the efficiency of polymer membranes without and with small amount of commercial plant extract involved in removal of nickel ions from synthetically wastewater using a mini-electrodialysis cell. The membranes were obtained by phase inversion technique at room temperature. The structure of the resulting membranes was investigated through Fourier Transform Infrared (FTIR-ATR) spectroscopy and Environmental Scanning Electron (ESEM) microscopy. FTIR spectra show that the peak at 2325 cm?1 shifted to ...

Nowadays, there is an increasing interest in the tight oil reserves. Such kind of oil have the specific physicochemical properties under conditions of natural occurrence [1]. In this article we consider the solution of the problem of preparing geophysical data for modeling seismic inversion on the example of bitumen deposits. The reservoirs occur at a depth between 150 and 200 m. Thuswise, the accurate processing of geophysical data remains actual. The seismic inversion is usually understood as a group of algorith...

Provision of the most comfortable and fast passenger transportation is the most significant goal for any taxi organization. Undoubtedly, the quality of cars and driverпїЅs professionalism is an important factor for the organizationпїЅs success, however, the initial impression of the customer often depends on the quality and speed of dispatcherпїЅs work. Failure to respond quickly to clientпїЅs question or an error during the order processing will result to negative customer views on the organization's ability to p...

Sludge from sewage formats municipal byproducts are considered "undesirable" that focuses remove pollutants from wastewater and can be a danger to the environment.Lupeni dump was born by storing the waste material resulting from the preparation of coal.The material deposited on the two branches of the heap consists of sandstone rocks clay, marl, carbonaceous shales and sandstones.From the analysis it is observed that: the reaction is slightly alkaline soil (pH = 7.4); humus content: medium to good; containing coar...

One of the main factors influencing the accuracy of the obtained lumber is the rigidity and stability of saws. In the process of sawing woodcutting tools heated. This phenomenon can cause a loss of rigidity and stability of saws. A log frames and band saws negative influence of heating can be compensated the additional tension and setting directing. Particular importance is the heating of circular saws due to the appearance of a temperature gradient along the radius in the process of sawing wood. Upon reaching the...

Processing the waste paper produces huge amounts of waste - papermaking sludge. This kind of waste includes around 50 % of inorganic material and high proportion of water. Its current economic recovery is very limited, which affects the overall efficiency of recycling paper. However, the elementary and chemical composition has a high potential for wider and more economically efficient use in various industrial fields. The object of this paper is research of composition and physical properties of such sludge from o...

Background: Currently develops a range of new and innovative construction systems, presented as modern methods of construction (MMC), which has the ambition to improve the buildings sustainability throughout their life cycle. Regarding the implementation modern methods of construction in Slovakia, assembled buildings based on wood, also called green buildings, seem to be the most preferred construction system. Methods: In the study, presented in the paper, were searched already built and occupiedfamily houses base...

The main goal of this present study is to determine the performance you can obtain from the implementation of fixed Building Integrated Photovoltaics (BIPV) on one family houses. The study will use a comparative method on one family houses between a flat roof, and a piched roof with two slopes, with different orientations of the plot. These various scenarios respond to urban implementation rules that are particular in urban planning. The calculations were made for a single family house with a built area of 100sqm ...

It is known that the medium-grade and low-grade iron ores before the direct use in metallurgical furnaces are almost always concentrated. For ore-grain release all run-of-mine ore is crushed and milled. The result of such operations is a finely ground concentrates, which are then subjected to clotting. Among the known methods of clotting of the wide-spread high-temperature methods - sintering and pelletizing followed by baking raw pellets. During these processes, there is a partial removal of detrimental impuritie...

The paper deals with the topics related to the construction of buildings and facilities in the selected mining areas and protected areas of mineral deposits which purpose both relates or does not relate to the mining activities. Buildings and facilities are within the territory of the Slovak Republic. The initial part of the article will briefly describe the issues connected with building industry challenges in such areas but the major objective is the analysis of opportunities for construction of similar faciliti...

The fractional composition of the chamber product of sulfide flotation was investigated. Grain size of the product varies from 0.2 to 0.05 mm. The characteristic of mineral composition showed that forsterite content is about 53%. The amount of other silicates (pyroxenes and garnets) is more than 20%. Two morphological generations of baddeleyite have been identified, it will be necessary to take into account physical and technological properties of the generations when developing technological solutions for gravita...

The solving of the project of the Ministry of Agriculture of the Czech Republic dedicated to sustainable agricultural management in the North Western Bohemia is under way from 2015 to 2018. The Brown Coal Research Institute is the main participant of the project. This article briefly summarises new results of the research of the Most Basin localities restoration problems. The main attention is devoted to the research of experimental areas founded in different dump localities with different dump rocks and different...

Ensuring stability of economic development, an energy and ecological safety is connected with increase in energy efficiency and decrease in power consumption of economy. The main indicator of resource intensity is power consumption. power consumption characterizes amounts of an energy consumption and fuel on the basic and auxiliary engineering procedures of production of products, performance of works, rendering services based on the set technological system. The Russian economy is one of the most power-intensive ...

In our century and especially in recent decades the noise level reached an increasing width, becoming a polluting source of the same severity as chemical pollution. Increasing power and work speed of equipments has contributed to diversifying and increasing the number of noise sources and thus increased number of people exposed. Noise generating sources in technological procedures of processing may be of continuous nature (pneumatic energy production, water transport) or intermittent (systems for transporting mine...

Animal bodies (mammalian and human body) show a great capacity for adaptation, both to the fluctuations of environmental factors and also regarding the nutrition, increasingly modified. General Adaptation Syndrome (GAS) of organisms, began to be studied in animals and also in humans. In human bodyes, GAS is studied because a number of disease with great significance psychologically, physiological but especially medical, appeard. In both categories of bodies, GAS is investigated by the presence of markers that high...

Even though land cover and use changes, climate changes and altered use of energy, known together as the пїЅglobal changesпїЅ have been studied intensively, their relationships are still under debate, especially with respect of assessing the anthropogenic contribution. The study relies on the hypothesis according to which poverty and lack of environmental awareness could lead to disastrous environmental impacts, with adverse economic consequences. Starting from an assessment of deforestations based on GREENPEACE d...

The appearance of species imported in the EU, and so on the Romanian market, led to a change in consumer preference towards new species of fish (tilapia, African catfish, pangasius) and aquaculture products (shrimp, clams, oyster, etc.). One of these species is tilapia (Oreochromis niloticus) which, at European level, the import volume is about 10,000 tons / year. In order to reduce imports and increase the competitiveness of aquaculture in the EU have been taken strategic measures to develop technologies that int...

The use of synthesis chemical substances in agriculture for increasing agricultural production and ensuring food across the globe is a process that has as a reverse negative effects on the environment and human health. According to the research conducted widely it has proved that, these synthesis substances that sometimes are toxic (pesticides, herbicides, etc.) have a negative influence on human health ultimately, also by polluting the environment, which represents the biggest challenge of the humanity today - cl...

Non-electrical equipment has been used for over 150 years in industries in which likely to occur a potentially explosive atmospheres and a great deal of experience has been gained in the application of protective measures for reducing the risk of ignition of such atmospheres to an acceptably safety level. For using non-electrical equipment in potentially explosive atmospheres, it became necessary to produce ignition protection concept standards which clearly defined these protective measures and incorporated the e...

These researches were conducted in the greenhouses resort didactics of the faculty of Horticulture and Forestry in Timisoara, using cuttings of Parthenocissus quinquefolia that were purchased from the mother plant from the same location. Four substrates were used for rooting namely sand, peat, perlite, perlite + peat, the cuttings were planted and treated with rooting substance of Atonic and Radistim. During the study was monitoring the rate of rooting of cuttings, aiming at influence of substrates and rhyzogene s...

The purpose of this paper is the time tracking behaviour of hydrotechnical structures by establishing basic displacements to basic slice and previous vertical slice, processing these measurements and draw conclusions on the behaviour of the analyzed works. As a case study was elected the Vidraru dam located in Arges County, being one of the most important dams in Romania. The Vidraru dam, built on the Arges River, is an "arch" dam with double curvature, being the highest concrete dam in Romania. The storage lake f...