Browse

The design and the execution of railways infrastructures imply exigent measurements not only from technical point of view, but also regarding the quality of the construction related or connected to the safety of the passengers. The technical norms and the continue development of the construction materials offers the possibility to realize infrastructures for railways that fist technically and economically to the concept of environmental protection. The geosynthetic materials involved in designing and maintenance o...

The post-mining landscape of Horn? Slezsko is characteristic by intense detorioration of original landscape features and components caused by underground coal mining. There are huge ecosystems changes typical for those landscapes reclaimed by classical nature-friendly methods and procedures. The aim of this study is fitness evaluation of selected trees species using their growth on selected plots for 2016 vegetation period. We have compared individual growth of trees by an orientation toward the cardinal points on...

This article discusses the possibilities of using a 3D printer with parallel kinematics that can produce good quality prototype components such as various covers, handles and functional assembly for simple electronic devices or robots. It will enable combining the printer with an engraving CNC machine, so that the effector head of the 3D printer will allow the head to be exchanged for printing with an engraver head, and it will allow fine engraving on printed circuit boards. The printer effector is equipped with a...

During the four years 2013 ? 2016 structural changes in top-soil in silage maize monoculture were evaluated. Soil condition was evaluated according to the structure coefficient (SC) and the stability of soil aggregate, i.e. its ability to resist degradation. The experiment was established in sugar beet growing region of Czech Republic on Carbonate Chernozem, clay loamy textured. Monitoring was carried out in three variants with different dose of applied compost: Variant 1 ? Control, without compost; Variant 2 ? Co...

The ground serves as an ideal heat source for monovalent ground-coupled heat pump (GCHP) systems. This paper presents a working methodology and develops an analytical model for evaluation of the ground thermal conductivity and the borehole thermal resistance using a thermal response test (TRT). Additionally, this paper uses the Earth Energy Designer (EED) simulation program developed on the basis of the line-source model to calculate the fluid temperature for a case study of the ground heat exchanger according to ...

The flourishing of the family Orthidae (class Rhynchonellata, order Orthida) was happening in the first half of the Ordovician, the stage known in the literature as the Great Ordovician Diversification. The problem of the establishment of the Biodiversity centers is one of the dominant problems of modern Evolution Biogeography. At the present time, there are not common criterions for the determination of biodiversity's center in spite of the unanimous acknowledgement of the existence of local speciation's regions....

The present paper aims to present the possibilities for creating a geographical information system in order to facilitate monitoring of the territory, by real-time analysis and providing local administrative information of interest, as well as for efficiently monitoring the achievement of the objectives of sustainable development in Zlatna locality. Zlatna area has a natural and antrophic capital insufficiently appreciated, promoted and exploited due to the lack of a uniform and efficient approach of all existing ...

Analysis of the environment state of oil and gas regions in the Yamalo-Nenets Autonomous District (YaNAO) on the basis of researches in the north of Western Siberia (2003-2016 years) is carried out. The area of research is Nadym-Pur-Taz interfluve, the north of Western Siberia, the Yamal-Nenets Autonomous District. Assessment of environmental components (surface waters, bottom sediments, soils, vegetation, and snow) has been carried out. The studies were conducted at three levels of landscape organization: local (...

The purpose of this article is to describe the modern methods of making models of quarry using the latest technologies such as laser scanning, land and air photogrammetry using Unmanned Aerial Vehicles (UAV) and their subsequent use in the planning of technological processes in the quarry. The first part of the article is dedicated to the creation of models with a focus on data collection and processing, compatibility of each format, the very creation of the model as well as the possibility of using the created mo...

In industrial power installations are encountered situations on the connection of inductive circuits to alternating voltage sources. These operations are accompanied by the occurrence of specific transitory regimes after which might occur over-voltages peaks which can become hazardous for the components of the circuit. The assessment of these over-voltages and of other specific electrical parameters represents the purpose of this paper. The measurement method is based on the usage of a data acquisition system prod...

Lake Usma is unique with hundred years' old nature reserve and Natura 2000 territories in one part of the lake and developing the tourism industry in other part of the lake. During last ninety years, the water level of Lake Usma increased for approximately one meter, which caused coast erosion, changed soil ground water level in large territories around it and it is regarded to be a major factor for lake ecosystem functioning. To find sustainable management solution of Lake Usma, there is a necessity to understand...

The proper selection of the structural steel grade has to take into account a lot of factors and, for structural steels, a minimum ductility is required so that the material shall have sufficient fracture toughness to avoid brittle fracture of the tension elements at the lowest service temperature. In this paper we present the methodology for selecting the toughness of structural steel with respect to EN 1993-1-10: 2003 and SR EN 1993-1-10: 2005. Establishing the steel sub-grade for the steel main girders of a rai...

Detecting and monitoring of coccolithophores blooms is increasingly important due to their significant role in ocean biogeochemistry and unique capacity for feedbacks to climate because of calcite carbon and DMS production and high reflectance. Application of remote sensing approach, based on dependence of water optical properties on coccolithophores/coccoliths abundance (particulate back scattering coefficient) , allows for tracing of coccolithophores dynamics at basin-wide scale enabling quantification of bloom ...

The work is devoted to the West Siberian sedimentary basin Bazhenov formation (or Bazhenov shale) ? a unique oil-generating and oil-bearing geological formation. Bazhenov shale is an analog of the known shale oil deposits: Bakken, Eagle Ford and Monterrey (USA). Geological and geophysical exploration of bazhenites is an important problem today, which is connected with development of new methods and technologies of unconventional oil and gas reservoirs exploitation. The work is devoted to physical and chemical prop...

The Bolshoi Altay (BA) located in the north-west part of Central Asian mobile belt on territory of the East Kazakhstan. The geological structures of the BA include Rudniy Altay, Kalba-Narym (in the north-west), Zharma-Saur, and neighbouring regions of Russia and China and, was formed in the Hercynian time in the process of collision of Kazakhstan and Siberian lithosphere plates and degradation of Irtysh-Zaisan paleo ocean. Regional and local criteria for forecasting of gold ore deposits of the BA have been develop...

In the western half of the Getic Subcarpathians, between Motru and Olte? is individualized one of the largest and unitary Carpathian depression areas, The Sub-Carpathian Depression of Oltenia.The Sub-Carpathian Depression of Oltenia, the sector between Olte? and Motru, is extended from East to West, for about 60 km, on an area of 130231 Ha.To the Mezorelief level, there are the following forms of landscapes: The groove of Internal Sub-Carpathian Depression, The Internal Carpathian Hills, The External Depression Gr...

Protected areas have been created to limit or remove the man and nature harmful intervention on the existing flora and fauna. The research work has been focused on a protected area from Dobrogea, where there is an acute need for intervention, in order to save the existing rare species of plants. A permanent monitoring of the evolution of these species and other floral species must be done permanently, to see the effect of invasive species on rare ones. Effective monitoring of the studied area has been carried out ...

The introduction of energy dissipating devices as passive dampers in structural systems under earthquake excitation is intended to reduce structural deformation and in certain cases to reduce the risk of damage to equipment attached to the structural system. In seismic design, the input energy of an earthquake is typically dissipated through hysteretic behaviour of structural members, which allows the structure to undergo inelastic deformations without compromising the stability of the structure. The energy dissip...

The aim of this paper was to obtain some fluid extracts from Romanian wild fruits such us, Cerasus avium L. Moench. (syn. Prunus avium L.), Morus nigra L. and Cornus mas L., with a rich content in polyphenols, carotenoids, vitamins, minerals and an increased antioxidant and antimicrobial activity, which bring important benefits to our health in preventing many diseases arose from free radicals of oxidative stress action. Vegetal fluid extracts obtained from wild fruits, at concentrations 50% v/v ethanol were obtai...

A regulation of the mining operations mode during a new phase of open pit mining deep lying minerals through implementation of temporary non-operating open pit edges on many deep open pit mines made it difficult to extract minerals. Innovative technologies of working zones development along steep open pit edges have been tested at the pre-design stage with comparison of the obtained mining schedules with the design schedules based on the analysis of methods of controlling mining operations mode and their existing ...

Lactoferrin (LF) is a globular glycoprotein with a molecular mass of about 80 kDa. It exists in two forms: apo- and hololactoferrin. Lactoferrin in the molecule has two domains that bind Fe3+ ions with high efficiency. The physiological properties of the protein are mainly due to binding to the iron of the active form by unsaturated iron (apolactoferrin). An iron-saturated form (hololactoferrin) is inactive. Raw milk contains mainly up to 90% apo-LF. Human milk is very rich in lactoferrin (about 1.7 g/L), and bovi...

The determination of the geochemical fractions of heavy metals in soils of technogenic landscapes is a key issue in the study of their mobility. The current study aims to investigate of the accumulation and mobility of Cu in soils adjacent to the Karabash copper smelter at South Urals, Russia. Studies were performed in the plume zone of the Karabash smelter and in the floodplains of Ryzhii Brook and Sak-Egla River for the surface layer of soil (0-5 cm). The level of Cu pollution by soil located at a distance from ...

The Baikal natural territory is an interesting object to research for many groups of scientists since from its state the protection of Lake Baikal, which is a natural World Heritage Site depends on. Climate change in the area does not only comply with the general trends, but has its own characteristics due to the highly broken relief and the presence of a large storage of fresh water ? Lake Baikal. Drastic changes in air temperature and a significant amount of precipitation can cause emergencies in the region. Tem...

Studies by and X-ray microanalysis and the magnetic methods showed the distribution of impurity elements over the scan area. There were identified phases containing copper, nickel and copper, nickel and cobalt and also the inclusions with a high content of copper and nickel. The concentration of individual elements was varied from sample to sample. There are areas highly enriched by iron and sulfur. The presence of native elements indicates a change of a temperature mode of processes of ore formation. The position...

Establishment of regular river sediment monitoring, in addition to water monitoring, is very important, as geochemical data of sediments are very significant for environmental impact assessment. First scientific investigations of sediments in Croatia started in the Krka River estuary in 1989, while first systematic research of a river basin in Croatia was performed in the Kupa River drainage basin in 2005. In 2008, Croatian water authorities (Hrvatske Vode) started a preliminary sediment monitoring program. Since ...

The purpose of this research was to improve the nutritional and sensory properties of butter biscuits by addition of grape pomace. The pomace derived from two grape varieties, Pinot Noir and Italian Riesling, was dried at 60°C for 8 hours daily, three days in a row. In the butter biscuits recipe, the wheat flower was replaced with three doses of grape pomace (10, 20 and 30%) added in the form of powder. A control sample, without any addition of grape pomace, was also prepared. The biscuits were analyzed in terms o...

The problem of a vortex pair motion under a free surface is considered. It is known (Barker S.J. & Crow S.?., 1977) that the vortices fly apart with respect to each other in the horizontal direction. The domain of computation will be on the half-plane with the symmetry condition on one of the vertical boundaries. Previously was received (Gushchin V.A. & Konshin V.N, 1992), that for the correct mathematical modeling of an unsteady thick layer of homogeneous incompressible liquid flow through an obstacle, it is nece...

The aim of this study is to analyze the deforestation process from Mehedin?i, Dolj and Olt counties, three of the most important counties in the southwestern part of Romania. We should consider the big challenge (as a global phenomenon of aridization) that the humanity must fight and manage, at the beginning of the 21st century. Evolution of deforestation process in the study area shows a continuous increase, because the high demand for wood mass and timber in industry and exports. The methods used to analyze the ...

GIS Web Applications are very useful when it is needed to highlight important changes in time in a specific area. ArcGIS Online and Portal for ArcGIS include an embedded interactive application for designing and building web applications from a web map. The application works on desktop browsers, tablets, and smart phones without needing a plugin. WebAppBuilder has a lot of customizable themes and widgets that allow to deliver advanced functionality, such as high-quality printing, geoprocessing, editing, and search...

The article discusses an urgent problem of developing wastewater treatment technologies that ensure high efficiency with simultaneous reduction of energy consumption and mass and size of a plant. Cavitation treatment is one of the modern and promising physico-mechanical wastewater treatment methods. Cavitation is a rupture of dropping liquid under the action of tensile stresses due to the change of characteristics of the velocity and pressure fields occurring at rarefaction in the considered point of the liquid. D...

Petri nets is one of mathematical modeling languages for the description of all kind of parallel systems. The new class of P/T Petri multiprocess multinets (PPMM) and its ASYNC-CALL operation are introduced in this article and their base characteristic of the well-formed property is proved. PPMM then generalize the definitions of the bi-relational P/T Petri nets and the P/T Petri process nets and their operators that follows from the base ideas of Petri net processes and their property-preserving Petri net process...

Wear-resistant composite coatings reinforced with Al2O3 nanoparticles (20nm) obtained by electroless technique are analysed in this paper. The structure and surface morphology of coatings with alumina nanoparticles embedded in the Ni-P alloy for different quantities of alumina in the nickel-plating bath (3g/L, 5g/L and 8g/L) are presented. Nanocomposite electroless coatings are characterized by optical microscopy, XRD and SEM. Microstructure of the composites has revealed uniform distribution of Al2O3 nanoparticle...

The uncontrolled water flooding in an abandoned open pit mine modifies the rock mass stability, causing rock wall falls and surface erosion that may affect great volumes of material. As regards Sardinia quarries, most of the open pit excavations need a recovery plan. The last mostly depends upon knowledge of the relationship between the geomorphological asset and the nature of weathering and related erosion processes. The aim of this paper is to evaluate the land degradation with a detailed photogrammetric survey ...

Kazakhstan has a special geological structure, which is not explained in full as from the position of geosyncline paradigm, and from a position of plate-tectonics. A comparison of the actual field geological research record of the paleozoic geological structures with the principles of plume tectonics shows that they are in good agreement. According to geological data, to develop superplume and its formation took place in the Paleozoic, which lasted impulsively with Ordovician to lower Permian. The Influence of thi...

Passive houses primarily belong to the category of buildings with very low energy consumption for object heating. Their overall energy performance is affected by a number of indicators, including in particular: solution of building structures and details on boundary of building heated space, characteristics of used materials and the choice of opening fillings. In the initial design phase of the building it is necessary to ensure maximum utilization of solar gains and internal gains from people and appliances. Howe...

Over 400,000 shells of different calibers were dumped in Burgas Bay after the end of WWI. The operation, under the coordination of the British forces, was completed without the dumping areas to be clearly mentioned and mapped, allowing us today to assume that they can be anywhere in Burgas Bay. Many other shells were also dumped in the sea at the end of WWII. During the first phase of expansion of Burgas harbor, carried out between 2001 and 2006, a great deal of unexploded ammunition, originating from both WWI and...

One of the most significant elements of every machine operation is its control system. Proper design, construction and operation of the control system is the key factor for correct and efficient operation of a machine. This particularly applies to mining machinery operating in hazardous environments and exposed to loads which cannot be fully predicted. Such machines must be therefore characterized by high reliability, durability, readiness and safety. In order to fulfil all these requirements, a machine must be eq...

In the paper we explain our experiences in the work towards a GML subset profile for Norwegian Areal Plan data sets, and how this GML subset profile together with requirements form the UML based conceptual application schema that can be used for data validation. GML is about to be the preferred exchange language for geographical information in Norway. One challenge using GML, slowing down the implementation of GML in Norway, is the complexity, e.g. the possibilities of representing the same information in multiple...

A mathematical model of the dynamics of pressure swing adsorption (PSA) process during the separation of multicomponent gas mixtures with the aim of producing hydrogen has been developed. The model allows to calculate the profiles of component concentrations (H2, CO2 and CO) and temperature in gas and solid phases, the pressure and velocity of the gas mixture along the height of the adsorbent depending on time. As a result of the computational experiments, the effect of changes in the temperature, composition, and...

In this study the intra-site variations in climatic signal observed in tree rings of larch from the Polish Carpathian Mountains were analyzed. To identify the differences between tree-ring growth of particular trees within each of analyzed sites, the descriptive analysis, visualizations, Factor Analysis (FA), Principal Component Analysis (PCA) and Independent Component Analysis were used. For evaluating observed differences the clustering methods (k-mean, EM, c-mean, Kohonen Artificial Neural Network) with ANOVA a...

The focal mechanism and rupture directivity for intermediate-depth earthquakes occurred in the Vrancea source (Romania) are determined using FMNEAR algorithm [1]. The method is based on the waveform inversion of near-source seismic waveforms and on a linear finite source model. When the FMNEAR algorithm is started the first parameters that are determined are the moment magnitude (Mw), the double couple focal mechanism (strike, dip, rake) and the distribution of seismic moment along strike. This provides a first or...

As direct consequence of the urban development, waste management is a multidimensional issue that incorporates political, institutional, social, environmental, and economic aspects. The paper aims to analize the efficiency of waste management strategy, implemented in the town of Boto?ani. It is also considering, the population?s level of education and perception, regarding selective collection and the quality of public Sanitation Services. Boto?ani is a second rank town (the most important in Boto?ani county), loc...

The management of construction waste it is at an early stage in urban areas and lacking in rural areas where this fraction is frequently uncontrolled disposed on public lands. Despite the fact some items of construction waste are considered inert for the environment (soil, concrete) it also contains hazardous items (paint additives, cans, and containers) or recyclables (plastics, metals, wood). Potential recovery of this waste stream is high if it is properly managed. The paper estimates the potential amounts of w...

Reliability of a concrete pipe culvert was tested under rail and embankment loads. In the finite element model soil-structure interaction and nonlinear behavior of the materials were taken into account. After a preliminary study three influential variables as random were selected for presented approach to probabilistic model, i.e. concrete strength, soil density and its modulus of elasticity. Because various concrete parameters can be easily derived from the compressive strength only this parameter was selected fo...

The paper deals with the efficiency of selected sorption materials when used on selected chemical hazardous substances in practice. Experimental investigation to very real effectiveness of technic sorption materials has been made. Selected samples of technic sorption materials that can be used for the disposal of leaked chemical substance. Sorbent powders of Eco Dry, Spilkleen and textile sorbents of HKZP 4446 and E 1000 where used and applied as technical sorbents. They studied technical sorbents are mostly used ...

TV measurement monitoring and diagnosis of the state of heterogeneous biological media can be carried out on the basis of processing the array of multispectral images of the object obtained by the CCD camera at characteristic wavelengths. The biophysical and structural parameters of inhomogeneous biological media of different origin influence their spectral characteristics, in particular, the coefficient of diffuse reflection. The aim of the work is to increase the reliability of monitoring of natural biological m...

The thermal insulation of the building envelope is a very important factor for the total energy consumption of buildings. Considering the fact that more than 40% of the global energy use and the corresponding CO2 emissions comes from the building sector, the choice of good thermal insulation products can contribute to large energy savings. The choice of thermal insulation products should not be solely made based on installation and operational costs, but rather on the global environmental impact and energy demand ...

Ploiesti is one of the major cities of Romania, which is confronting potential occurrence of high-concentration ground-level ozone events, having in view its industrial activity concentrated mainly on oil refining, oil extraction equipment and machinery, metalworking facilities, chemicals production, etc. Mobile sources (traffic and public transport system) have also a significant contribution to total air pollutants concentrations. This study aimed to analyze the concentrations of ground-level ozone (O3) and arom...

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 research is to identify geoecological hazard caused by natural and human-induced processes at the Azov seashore within the Rostov region. The data for the last 90 years about changes in the coast features of the Sea of Azov were examined in this paper. To assess the extent of the risk of the seashore destruction geographical and ecological techniques have been applied: laboratory and field work at the collection, analysis, and estimation of coast features, measurements of marine erosion rate, c...