Browse

We analyzed the dynamics of Lake Teletskoye water level and attempted to use data on bottom sediment geochemistry in combination with Siberian larch (Larix sibirica) tree-ring width chronology to reconstruct it for late Holocene. In particular, we studied the links among the water level characteristics, precipitation amount, bottom sediment geochemistry, and tree-ring width chronology available for Russian Altai. A correlation analysis revealed the annual water level fluctuations to correlate closely with mean ann...

Renewable energy is a key factor in the sustainable development of any modern society. The development of renewable energy project must continue to be part of a competitive economy and the research and innovation of this domain should be a priority. One of the renewable energy sources (RES) that are reliable, provides predictable energy, assures the energy supply in remote areas and at the end of the power transmission lines, are small hydro power plants (SHPP). In Romania SHPP are not new, being part of the devel...

The main goal was to define basic forms of propagation oriented at internet media and mainly for propagation oriented at social media for product entering at market. Nowadays, social media represent important marketing channel appropriate almost for every products at market. The advantage of propagation on social networks is low financing cost, what is good mainly for companies which are not so known at market. Because of that, we should consider social networks as information channel rather than means which will ...

The mineral deposits are important for the Russian Arctic. The resources of PGE minerals and gold, nickel and titanium are more than 10% of global significance. Meanwhile, the most arctic territory is out of availability for detail geological and geophysical prospecting due to severe climatic situation and difficult accessibility. The spatial relations of ore deposits and bearing formations of different geodynamic nature at Russia territory show that the geological sequences are of three basic types of geodynamic ...

An evaluation of dinas quartzitesпїЅ deposits was carried out. Quartzites, quartzite sandstones and quartz sands with SiO2 content more than 96% are used are used for production of metallurgical furnaces. Objects of study were probable and proved reserves and resources of monomineralic quartzites of Vasylkivske and Tovkachivske deposits. Deposits are distinguished by mineralпїЅs quality, significant reserves and favourable conditions for open-pit mining. Reserves were calculated by the method of geological blocks ...

The geophysical surveys methods have not been extensively used in gold exploration in Northern Portugal. This is based on the fact that most mineralized zones contain low and erratic sulphide contents. In this work were tested three different types of geophysical surveys combined with geochemical surveys, in order to define anomalies that are closely correlated with the locations of known mineralized zones. The aim of the work is to study some gold deposits in Northern Portugal (Lagoa Negra and Castromil) with the...

Geochemical barriers are the special type of natural systems boundaries. They prevent the penetration of some of substances and are open for the migration of others. For the inorganic substances, especially for the metal ions the barriers are studied enough completely: the models of barriers are developed, the penetration and accumulation kinetic is assessed. But for the organic compounds the role of the geochemical barriers is practically not studied. Especially important are such assessments from the point of vi...

The aim of this article is to assess the impact of changes in particle size on the production yield during thermal degradation пїЅ pyrolysis process. For the purpose of this research the energy grass пїЅ black bent grass (Agrostis gigantea) was selected. The input material has been tested in four different granulometric fractions пїЅ original unadjusted material, crushed material, and also in the form of two kinds of pellets of different size. For pellets, the basic mechanical properties were determined пїЅ mechan...

CRM is more than software or group of methods; itпїЅs a business education, which is consistently aimed at getting and keeping right customers. Commercial success each of company depends on relations with customers. Relation with customer will be effective or ineffective according as company has quality information about customer. In a last year we are able to see the need for higher and better degree of integration, co-operation and customer data-sharing between Sales and Marketing, which will improve the ability...

In Romania, there are great possibilities for conversion and use of renewable energies, especially wind and solar energy. In order to maximize solar energy conversion, both as thermal energy and electrical energy, there are used sun tracking systems for solar thermal or photovoltaic panels, implying various types of drive: electric, pneumatic or hydrostatic. Based on the experience of more than 50 years in the field of hydraulic and pneumatic drives owned by the Institute INOE 2000-IHP, there have been designed tr...

Tonsteins are rocks which, due to their origin, mineral make-up and structure, are valuable petrographic benchmarks in the monotonously formed Carbon coal-bearing formation of the Upper Silesian Coal Basin in Poland. Mineralogical study of tonsteins is important with relation to learning more about their tuffogenic protolith. It can also serve as one of the criteria when differentiating tonstein horizons with a similar texture: structure, granulation, directions and intensity of transformations of the tuffogenic m...

Pre-failed landslides occurring in quasi-homogeneous soils are difficult to be characterized from the standpoint of their partially formed failure surface geometry. The paper presents the combined geotechnical investigation methods (fully sampled boreholes with laboratory tests, in-situ dynamic probing and so on) giving a very accurate point-wise description of the soil, with geophysical methods (electric resistivity tomography пїЅ ERT, seismic refraction and multichannel analysis of surface waves пїЅ MASW) provid...

The energy recuperation systems are being increasingly used in modern non-hybrid cars. It allows to recover part of the energy without mounting an additional electric engines and a set of batteries with high capacity in the vehicle. Recuperation of energy, however, involves a number of limitations resulting from: traffic conditions, vehicle construction parameters, electrical energy demand in the car and from the construction of the energy recovery system. In this article presented the results of road tests in a r...

Nowadays the renewable sources of energy are gaining more and more in importance to meet the society requirements of energy in a sustainable way. Biomass is among the renewable sources of energy which is known and used since ancient times and it is of great importance for present as well as for the future. One source of biomass are agricultural crops through their residues but also as agricultural crops specially designed to produce biomass and known as energy crops. Although the biomass was traditionally used to ...

Successful development of business depends on using integrated information of business activities by management of the firm. Costs analysis of energy has important task in energy management, that present structural element for preparing of budget. Therefore it uses various economic analyses in praxis and energy management is one of these tools. Implementation of energy management in praxis goes out of necessity of environmental behavior. Using of energy management tools in area of energy cost decreasing presents f...

Two large intrusive massifs of different ages on the Fennoscandian Shield are exemplified to analyze the distribution pattern of megafractures. Megafractures are rectilinear tectonic dislocations varying in length from hundreds of metres to several kilometres. Megafracturing was analyzed on rapakivi granites from the Neoproterozoic Salmi multi-phase massif. Another goal of the project was to study the Paleoproterozoic Ropruchei gabbrodolerite sill. Topographic maps and satellite images were used for analysis of me...

The article considers the theoretical aspects and practical methodology of cost-effective eco-directed structural design. Nowadays the problem of ecological safety of the construction process is significant all over the world. Most efficient ways to solve the problem are dealt with keeping the environmental requirements at all phases of construction and best possible conservation of the whole ecosystem. All kinds of environmental harm, caused by construction process, generally could be converted to certain amount ...

It has been statistically proven that tuffogenic sediments, especially tonsteins, have a negative impact on the incidence of pneumoconiosis (silicosis) among miners in French coal basin. Therefore, the rocks attract the interest of geologists not only due to their origin and possibility of use for correlation purposes, but also as a source of dust hazard in mines. The present publication presents mineralogical tests of inhalable grain size dust formed during the exploitation of a coal seam with a tonstein overgrow...

Year by year, the growth of the share of heavy oils in the total volume is steadily increasing. For development of highly effective methods for its processing, approaches to modelling their properties should be elaborated. This thesis is dedicated to deriving and substantiating a formula for calculation of the velocity field in the round pipe volume as adjusted for rheological features of the flow of heavy oil suspensions. The suggested approach is based upon rheodynamics equations reflecting the flow of a rheolog...

Forecasting of viscosity value in blending of oil products is an important production task, settlement thereof influence the selection of its pumping mode and a number of other technological aspects. Quite high-precision models have been offered for the objects similar in viscosity, but at significantly different value of viscosity for the mixture components there is a great error. Graphic diagrams of interaction of petroleum-bitumen suspension-kerosene mixture viscosity at various ratios of its components and var...

Compacting is an important technological operation when forming of earth fills and backfills, where appropriate earth stabilization and in the construction of highways and roads in the compaction of bituminous and other surfaces too. Compaction is technologies that occurs at the building during construction time. It should be optimally compress all of the individual layers of the respective construction works. The works must be carried out as precisely and as economically with the smallest number of crossings comp...

This study investigated the degree of heavy metal accumulation in fruits, leaf, shoots and associated potential health risks in agricultural areas of the Mitrovica city, northern Kosova. Total concentrations of lead (Pb), cadmium (Cd), nickel (Ni), arsenic (As), zinc (Zn), copper (Cu), chromium (Cr) and iron (Fe) were determined in soil and fruits, leaf, shoots apple tree with rootstock MM106. Samples collected from agricultural areas (near Mitrovica city), have been analyzed for heavy metals (Pb, Cd, Ni, As, Zn, ...

First part of the paper presents the monitoring project of Turdas tunnel with the detailing of the monitoring equipment. Building of Turdas tunnel was realized for ensuring the maximum speed of 160km/h for passenger trains. In order to build the tunnel was provided a provisional support and a final support, due to difficult field conditions, obtained from the geotechnical studies, because of the presence of the swelling soil. To achieve safe construction of the tunnel were mounted specific monitoring equipment in ...

The present study aims an integrated risk analysis of existing or potential natural constituting a direct or indirect threat on the analyzed geographical area. These regularly processes cause lately extreme and significant disturbances in the primary and significant damage system components in various fields of economic and social life. With an inventory of all these dangerous phenomena may be proposed at local government levels, a series of joint measures on mitigation and combating the effects induced by natural...

One of the main objectives in real-time assessment of seismic hazard is the development of algorithms for rapid estimation of the seismic source parameters (fault planes solutions). The objective of this work is to test and implement new methodologies in the National Institute for Earth Physics (NIEP) for near real time estimation of fault planes solutions taking the advantage of the spatial density of the Seismic Network in seismically active zones ( 120 seismic stations used in real time) and the full range of t...

Innovative aerobic granular sludge (AGS) technology has proved its ability to remove organic pollutants and nutrients from wastewater treatment at the same efficiency, but at a lower costs than conventional biological process. This technology has been successfully applied in sequencing batch reactor (SBR) configuration. An experimental model bioreactor was designed for adapting the AGS technology to continuous flow conditions. This paper presents numerical results for hydrodynamics and air dispersion into bioreact...

The energy sector is an essential component in any nationпїЅs economy and well-being. The security and safety of any energy grid system is nowadays a strongpoint in mid and long term strategies when it comes to national development. Safety and security of energy supply is a multicomponent factor that includes: power generation systems, power transport and distribution systems and consumer management. The power generation units in Romania are very complex and they include different sources like coal, gas, nuclear, ...

The present paper uses microsimulation softs to identify the main problems regarding the speed humps location and proposes some improved solutions, with effects on traffic, pollution and safety. This paper also defines the notion of "speed hump", its main advantages, disadvantages and some implementation requests. The most accessible measures to increase road safety, both in economic and design terms, are the traffic calming measures, such as speed humps in different shapes and sizes, low-price solutions with sati...

We have collected paleomagnetic samples from Late Devonian (Fammennian) basalts and sedimentary redbeds at the Bykovskaya Straight (in the vicinity of Lena River delta). Most studied samples carried interpretable paleomagnetic signal. Three paleomagnetic components have been isolated: A+AпїЅ, C, and D. The magnetization of the overwhelmed majority of Late Devonian samples from the Bykovskaya Straight has been reset by modern (or Late Cenozoic) geomagnetic field (component A+AпїЅ). The sole site was characterized b...

This article proposes a software tool, based on artificial intelligence technics, to grid operators and energy companies, to optimize the power system. Precisely, it uses pattern recognition capabilities of neural networks, in order to enable a higher share of renewable energy to consumers. The applied analysis on PV power and other related electrical grid data, such as smart energy meter readings, are based on pattern recognition technics. The neural networks used for this approach will identify days of the week ...

This paper presents a theoretical and practical approach of the evaluation concept of professional risk specific to activities of gas wells extraction and initial processing. The scientific research highlighted in this article was obtained during INSEMEX Project from The National Program for Research and Development PNCDI-CEEx. The main purpose of evaluating industrial risk is to prevent this type of risk and when there is no possibility to eliminate it, it is mandatory to reduce it up to the amount of residual ri...

Salinity of drilling waste is a serious problem, and it is one of the biggest problems at the stage of selecting drilling waste utilization method. The high salinity of drilling waste results from a few causes, i.e. the use of drilling fluids (inorganic salts are commonly used as drilling fluids components) in the process of drilling, drilling in saline formations and also brine inflowing to the well. The investigations carried out on drilling waste has shown that their soluble salts of alkali metals in the form o...

Russia has a significant bio-energy potential and a large fund of land resources, so there is no competition between the cultivation of bio-energetic crops with basic food ones, as in case of the EU countries. There is a steady trend of further growth of bio-energetic cropпїЅs agroclimatic potential under condition of European part of Russia through the expansion of the agricultural zone to the north and east due to global climate change and the pressing in the agricultural turnover temporarily unused and fallow l...

Information regarding activity on the market provides valuable source for the future managerial decisions of each company. They are very important for achieving company strategic goals which represent part of a long-term strategic management concept of the company. Highly-valued information concerns especially the sales and the expenses development. Development of set company's values can be predicted to a certain extent using mathematical methods. Company can adequately respond to its future predicted state of va...

This paper reports the preparation of novel polymer membranes by phase inversion at room temperature (25 пїЅC), using acrylonitrile, acrylic acid, dimethyl sulfoxide and small amount of medicinal plant extract. We investigated the structure of the resulting membranes through Fourier Transform Infrared (FT-IR) spectroscopy and SEM microscopy. Also was determined the water content. FTIR-ATR spectra show that the peak at 1723 cm-1 shifted to lower wave number when medicinal plant extract (1715 cm-1) is added in the p...

Classic models of fault related folding frequently fails to describe complicated geological structures. The combination of tectonic modelling techniques can be used to reproduce observed geometry of folds. Indirect information contained in geophysical data can provide a good quality check for proposed tectonic models. The Draganowa Anticline is the westernmost part of the Draganowa-Iwonicz Fold. This structure is characterized by existence of very steeply dipping limbs in shallow zone which turns into gentle antic...

Border effect is a phenomenon that adversely affects the development of the regions. It involves the suppression of links between centers, which limits the development of the areas between these centers. Each type of boundary is generating variously powerful border effect, which can be quantified as the ratio between the expected and actual power of spatial interactions. Expected power of spatial interactions is calculated on the basis of geographic application of the gravity model, calibrated by using data on dai...

The goal of the presented study was to investigate and outline potential benefits of an integrated scientific analysis, encompassing modern automated mineralogy and largearea SEM-imaging data for the needs of multiscale geomechanical and hydrodynamical problem solving. A research was conducted on a set rock samples of a Russian promising tight gas-bearing formation, featuring nanometers-to-millimeters pore space elements, wide spectrum of mineral composition, and a complex multiscale pore-space topology. In the cu...

The research was aimed to study the pore water volume and chemical composition in the isolated core samples of the Bazhenov source rock formation taken from four different oil fields in West Siberia, Russian Federation. The approach is based on the complex laboratory methods of the investigation such as Dean-Stark and evaporation methods, the X-ray spectrometry, mass-spectrometric study (ICP-MS), water and Pfeffer's solution extracts. It was found that the samples contain three types of pore water: free groundwate...

Exergy analysis is a tool, which indicates how far the system departs from the state of equilibrium. Exergy has been implemented as a preferred means of characterizing the impacts of resource consumption for the purpose of improving decision-making. The present study realizes an energy and exergy analysis for a heat exchanger in operation for a district heating system. Exergy balances of a heat exchanger were therefore established to identify the thermodynamic imperfections of the process using real data. They are...

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...

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...

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...

Earthquakes represent a real threat in Romania. They can cause important damages, loss of lives, socio-economic as well as cultural losses. The National Institute for Earth Physics (NIEP) is the only governmental organization responsible for monitoring the seismic activity on RomaniaпїЅs territory. NIEP provides different kind of information minutes to hours after the occurrence of a significant earthquake in Romania: near realtime information (location, depth and magnitude), ground shaking parameters and maps wit...

The Permian sedimentary succession exposed in Sirinia Basin (South Carpathians, Romania) provides a record of mixed siliciclastic-volcanic rocks. The siliciclastic rocks are represented by conglomerate, sandstone and claystone, which are grouped into nine lithofacies (Gmm/mg, St, Sh, Sm, Sr, Fl, Fr, P) occur in a predictable order as repeated fining-upward cycles. Groups of associated facies are arranged into five distinct architectural elements (gravel channels, ribbon-channel, sandy channels, laminated sand shee...

The seismic investigation of buildings is in accordance with two important Romanian Codes, P130/1999 and the seismic design code P100-2013. Criteria for selecting buildings proposed to be seismic investigated/monitored are numerous: seismic zoning of the territory; data on structural system and types of existing structural systems, depending on the material pre and post-1940; the effect of vibration other than from the seismic vibration; location-site; seismic stations and sensors, sensors position/location in a b...

The air traffic in the European Union and operation of individual airports, including service provisions, belong among the most unregulated industries. Free market economies result in keen airport competition, and especially those airports are affected that compete for customers of the same catchment area. Passengers prioritize airports not only because of the quality of the services offered and provided but passengersпїЅ priorities also reflect presentation strategies of airports, as well as their communication a...

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 ...

This paper presents a possible alternative solution to cold a retail center located in Brasov, Romaine. Absorption machines using thermal energy are excellent alternatives to mechanical refrigeration.The proposed solution uses a single stage absorption systems working with LiBr-water. This solution uses the water as a refrigerant which has a null direct impact on the environment (ODP=0 and GWP=1).The proposed scheme is the result of experimental research conducted by a team from the Thermodynamics, Heat Transfer a...

The Tourism Resort Praid is one of the most dynamic resorts in Harghita County, Romania. In 2006, the settlement was given the title of resort. Since 2006 the resort started an accelerated development and is being affected by a series of new and old geographic risk factors. To determine these risk factors we used the direct observation method, quantitative and qualitative analysis, GIS analysis and representation, and cartographic method. Among these risk factors we will enumerate some natural risk factors like ex...