Browse

Leaking oil, diesel, gasoline and other dangerous substances transported in large amount mostly on roads and railways affect the soil, rivers and underground fresh water. The fast reaction is necessary in order to stop leaking and to protect the surrounding environment. There are usually no special sorbents at the place of accident, therefore improvised sorbent should be used. Some of natural sorbents are surprisingly effective. Improvised sorbents were experimentally deeply tested in order to find out their chemi...

The problem of traffic noise is particularly important in urban areas. Comfort of residents living near the streets is also crucial. They often live in tall buildings. In this paper, analysis of sound level in the front of high block of flats is presented. In order to make sound level measurements, a thirteen storey building was selected. It is situated in low excavation at front of one of the streets in Szczecin. This street connects three large settlements on the right bank of the city. In the front of selected ...

This study focuses on the source potential distribution within the Menilite Beds (Oligocene) in the Central Carpathian Synclinorium (Silesian Nappe) in the eastern part of the Polish Outer Carpathians. This region of the Polish Carpathians is one of the oldest petroleum-producing regions in the world, where in several folds plenty of oil and gas fields were discovered. The Menilite series contain the best source rocks in the Carpathians: the Menilite Shales, in which the liptynite group with humic components is a ...

We analyze source spectra of 30 moderate earthquakes (M ? 4.0), occurred in Albania during the period 2009-2015, with the aim to estimate their dynamic source parameters. Using broadband seismic records (BB) of Albanian Seismological Network (ASN), along with those from other regional ones, data representative of local tectonics of Albania, are selected. To achieve the displacement source spectra S(f) of S-wave, we adopted the Brune ?-square model, after correcting for instrument response and path effects. Obtaine...

The construction of a numerical hydrogeological flow model must be preceded by obtaining necessary information. Quantity and reliability of information may extensively impact on the process of model construction and its later calibration, and as a result пїЅ the quality and reliability of prognostic calculations. The article deals with sources of data required for a numerical groundwater flow model and it presents various types of data resources. The model is based on a number of overall nature materials, such as ...

The technological progress did assure in the past the desire of the humanity to increase the quality of life. The developments did however emphasize that beside wanted effects of technological progress, undesired effects can appear. In order to find solutions for this dilemma, global debates on scientific and political levels started some time ago. In the Brundtland Report 1987 the concept of sustainable development has been defined and accepted as a possible solution for the global complex problems. When consider...

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...

Carrion beetles of genus Thantophilus are an important part of the North Hemisphere ecosystems. They provide valuable ecosystem services by promoting nutrient cycling and biological control of pests. They also regularly occurs on human remains and some of them are established forensic bio-indicators as they could provide valuable information regarding time of death and possible body manipulation. Thanatophilus sinuatus is one of the most common species of necrophagous beetles in the Czech Republic and our goal was...

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 ...

Genesis, transport and accumulation of settled sediments of mountain rivers are such random processes in time and space, which are defined by the river flow rate (Q m3/s?c), height of the basin (IпїЅ), the inclination of the river and basin geology. Genesis and the volume of river sediment is the function of the climate and, in accordance with its cycles, it increases during the warming period and decreases as the temperature falls. The main natural factors for sediment formation are the glacier, erosion, landslid...

The rapid increase of the population, misuse of natural resources, contradictions about potential land use are the most important problems on the agenda of many developed and developing countries around the world. In the last century, the migrations from urban areas to rural areas due to labor force employment and living conditions led to the growth and urban expansion in the cities. This situation reveals the necessary changes in land use in order to provide people with the fundamental needs such as food, accommo...

The Plou?nice River (the Czech Republic) has been impacted by the uranium mining in the StrпїЅ pod Ralskem area mainly from 1971 to 1987. The extreme flood in 1981 contaminated the Plou?nice River system by uranium, radium and also by heavy metals. The pollutants are now deposited all over the floodplain downstream from the mining area. Other extreme flood in 2010 caused the remobilization of deposited pollution. This paper is focused on the spatiotemporal changes of the Plou?nice River between StrпїЅ pod Ralskem ...

This report presents an approach to building specialized computeromputer-aided software engineering (CASECASE) tools for the development of information information-calculating applications including computer aided ac counting, business correspondence, statistics etc. These tools form an integrated development environment allowing the computer aided development of different applications in this field. The concept of the integrated development environment is defined as a set of tools and techniques allowing the desi...

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...

This study is devoted to the investigation of zooplankton biodiversity and their adaptation to the short growing season of polygonal pond, located in the largest Arctic delta - the delta of the Lena River (Republic of Sakha (Yakutia), Russia). Samples were obtained within the Russian-German project "Expedition Lena" (August 2013, June-August 2014). Investigated polygonal pond with thickets of macrophytes shallow, well-oxygenated, weakly mineralized with low conductivity, slightly alkaline pH. The pond freezes in w...

Numerous past studies proved the potential of fluorescence spectroscopy to characterize aquatic organic matter and its link to function and chemical water quality. It was proposed as an optimum monitoring method due to its advantages, such as: rapid measurements, high sensitivity and selectivity, requires small quantities of sample with little or no sample preparation. Although fluorescence spectroscopy was used on different types of water systems, no complex study was undertaken to compare the fluorescence signal...

The atmospheric sound waves with frequencies lower than 20Hz are named infrasound waves. Among the multitude of infrasonic signals that have been recorded and detected during time, some of them have been associated with different natural or anthropogenic sources and the source of many other remaining hidden and unknown. At the beginning of year 2013, a permanent infrasound monitoring system composed by a MB AZEL2007 microbarometer, the digitizer and the transmitting equipment, was installed by NIEP, at Mangalia, R...

The Power Plant Rybnik (Elektrownia Rybnik) is one of many in Poland, which is coal-fired. Fly ash, as is well known, are combustion by-products, which are mineral residue from burning coal. Their phase composition depends mainly on the quality of fuel (coal) and combustion conditions. In the mineral composition of the examined ashes one has identified minerals such as: glaze, quartz, mullite, spinels, hematite, and unburnt coal. Spinels present in the fly ash can be a source of some metals, and due to the magneti...

This study comprehends the stability assessment of seven slopes with Pre-Cambrian rocks and located in traffic-access areas of SW Angola, one (Slope 1) is located on the road access from Lubango to Tundavala Gorge, another slope belongs to the CaholoпїЅs area near Humpata (Slope 2) and five of them (Slopes 3 to 7) are located on the LebaпїЅs Sierra, along the sinuous hair-pinned sections of the National Road 280. Slope 1 is composed by quartzites, volcanic rocks and lutites. Slope 2 shows sandstones, lutites and q...

The problem of atmospheric air pollution attracts great attention of ecologists and physicians because the protection of the environment and population health has a socio-economic significance. Oxides of nitrogen and carbon, methanol, phenol, formaldehyde, ammonia, chlorine hydride and suspended particulate matters (dust, soot) are the main anthropogenic air pollutants in Tomsk city. The main task of the air pollution monitoring is to identify sources of pollutant emissions. Stable isotope ratio analysis of the li...

The current demand for energy production in dissipated systems and the related need for miniaturization of power machines require the use of appropriate technical solutions. Increasingly, power generation microsystems are used to produce electricity that functions in hermetic circuits (e.g. ORC - Organic Rankine Cycle). Rotors of such type of machinery, in order to generate the expected amount of energy, must rotate at speeds up to 100,000 rpm. Rotational speeds of this order represent significant problems in the ...

The studied area is located in the vicinity of Rashid branch, part of the Nile Delta. This region is part of one of the most important aquifers in the world. The review of published information indicates that the existing zone of interaction between groundwater and sea salt water is complicated by the variable lithological composition in vertical and horizontal directions and by the relationship with the River Nile waters. Object of study are the upper parts of the aquifer where favorable conditions for natural sa...

Steganography is part of security science that deals with art of data hiding. Modern steganography can serve as an effective tool for hidden data transfers or watermarking for various computer formats, like JPEG, PNG, and MPEG. But it can be misused for stealing data or information transfer in illegal activities too. Most of today available steganography tools are free for use with easy user interface. This significantly increases the risk of exploiting in business sector. Revealing this data is very difficult and...

In this study are presented and analyzed data resulted from monitoring of ions concentration: NO??, NO?? and PO?пїЅ? in surface waters from Bucharest during 2013 пїЅ 2016 period. The concentrations of these ions are an important indicator of the degree of eutrophication of lakes. The monitored surface waters are formed of 12 lakes rezulted by systematizing of Colentina River. The sources of pollution with nitrates and phosphates are coming from economic activities around lakes, from urban transport, and the initia...

This article is referring to a short study regarding the energy efficiency status in retail industry in Romania, in particular an analysis of the big sizes commercial buildings in this matter. It contains data which will allow us to compare an existing building with the industry norms in terms of the energy consumption and energy costs. Additionally, there are some recommendations provided to be taken care of in the near future for controlling energy better, using energy in a more efficient way and reducing avoida...

Russia is one of the most important players in the Arctic Zone with significant economic, security and political interests on these territories. This is primarily because of significant natural resources, in particular oil and gas, in the Russian Arctic. The objective of this paper is to define the main prospects of strategic development of the Russian Arctic zone, and to offer socioecological approach to its development. Arctic has considerable strategic importance to the Russian economy. Strategic development of...

The paper examines the various developments regarding strategic management of raw materials on national, European and international levels. The problems linked to this subject are of increasing importance for the producing industry. Thus it is necessary to act quickly and pursue a sustainable raw material policy. The main purpose of this work is to analyze the possibility of fly ash utilization for the road construction and possible application in other industry branches with interest. The methodology used in the ...

The пїЅameli Formation extensively outcrops in Denizli-Mu?la and Antalya (SW Turkey). In this study, the stratigraphy and ostracod assemblages of the пїЅameli Formation was studied. The пїЅameli formation is first defined in the пїЅameli Basin (Denizli) which is one of the grabens formed in Pliocene. The пїЅameli Formation consists mainly of lacustrine sandstone, marl and claystone and shows prominent terrestrial sedimentary features. In the field, the formation was observed as two different facies: Facies 1: disp...

The active stress pattern in the Apuseni Mts area is investigated and studied in relation to the local seismicity and geology. Our analysis is based on several high quality and resolution data bases obtained recently in the context of national and international projects and which refers to digital seismograms recorded by dense networks, parametric earthquakes catalogues and catalogues of focal mechanisms. The reduced stress tensor has been obtained by formal inversion of 89 focal mechanisms solutions. The maximum ...

In constructing the marine pipelines, the concrete weight coated pipes are used to create a negative buoyancy coating and its protection from the external mechanical damages produced by icebergs, trawl nets, anchors, dropped objects. So far, no requirements have been formulated for the determination of the stress-strain state of the concrete weight coated pipes laid using the stinger (S-lay) system. The structural analysis carried out in accordance with the standard requirements does not account for the negative b...

Faults can act both as seal and as pathways for fluid migration and therefore correct evaluation of fault zone properties is one of key element for conventional hydrocarbon reservoir management. Nevertheless, the unconventional plays deformed by faults became increasingly in demand for petroleum industry. Lower Paleozoic sediments in central part of Baltic Basin are considered as potential unconventional shale gas system. Key TOC-rich intervals in the area of interest are Caradoc Sasino Formation and Lower Llandov...

The use of coal resources has contributed to the economy of Jiu Valley over a long period of time. Considering the long-term role of coal, many experts believe that the coal-based energy is sustainable, ensures energy security, and may become a growth factor in the area. The knowledge and technologies improvement for coal extracting from the Jiu Valley mining basin, where many mines were closed due to lack non-performing loans and lack of profitability, represents a first step in the sustainable rehabilitation of ...

Previous researches have shown the possibility of using organic-mineral additive based on glyoxal for injection strengthening of soils in roadbases and engineering communications. Saponite containing material was used as mineral component in the composition. Saponite containing material is a solid phase, extracted from the circulating water suspension of the kimberlite ore dressing. Modification of the sandy soil by the tailored organic-mineral additive content increases its specific cohesion up to 50 times. It wa...

The article shows features of a soil, illustrated with cracks. These cracks are natural detail of a soil, which more humified and less dense, than the rest part of the soil. Author highlights frequency and depth of these cracks in a soil profile, which essentially affects on the functions of the soil at the disclosure. On the mastered for an agriculture soil, cracks come from surface, in spite of that top horizons of the soil were homogenized in processing. Cracks go through the most humified part of the soil, whi...

Starting with the year 2020, all new buildings in the European Union, must meet the requirements imposed by laws on energy efficiency. Romania is an EU member country, accordingly must also respect these provisions. In the present study, we identified new hybrid elements for construction of closing/partitioning, energy efficient. These are the result of associations of construction materials with similar properties, having a very low thermal conductivity. The main materials used to make hybrid structures, energy e...

The work is devoted to the investigation of the viscous properties of a nanostructured additive based on sevilene, as well as the evaluation of its structure by the method of IR Fourier spectroscopy on the Shimadzu IR Prestige-21 Fourier spectrometer. The structure of agglomerates of the additive is proposed, which consists of a core-nano-sized particle of aluminum oxide bound to polymers (sevilene) by associative bonds. In this case, a partial restructuring of vinyl acetate units occurs. The absorption band of 13...

Coordination compounds of metals and their halides with biologically active organic ligands can be used to produce materials with various optoelectrical and magnetic properties. Some of them can enhance the tunnel effect. Complexes of metal halides with amino acids and halogens with various structures have been synthesized. Lithium halides, which form complexes with electron-donor molecules are of particular interested for biological applications. The studies on coordination compounds of lithium halides with amino...

This paper reports the synthesis of hybrid zirconium sol-gel coatings by solпїЅgel process at room temperature (25 пїЅC), using tetraethoxysilane (TEOS) as a precursor and different alkyltriethoxysilanes (RTES) with variable organic functionality (methyl, vinyl and octyl) as surface modifying agents. All silica materials was prepared with zirconium(IV) propoxide (as cross-linking agent), by keeping the molar ratio of TEOS:RTES at 1:1, in acidic conditions. The zirconium sol-gel films were obtained by depositing th...

The main aim of case study is to compare changes in landscape structure between the years 1958 - 2009 in territory of the old industrial city Krompachy in Middle SpiпїЅ in Slovakia. The assessment of the spatial structure the classes of the land cover has significance especially for the research of landscape especially from the aspect of the maintaining landscape ecological stability and the sustainable development as well as the landscape potential. Land cover reflects the physiognomy of landscape, utilisation of...

The e-learning system eLogika serves for teaching logic. In the system there are study materials at studentsпїЅ disposal, but it also provides online tests and promotes all the activities in which the students can obtain their credits. The system collects data about users who are logged in, e.g. time spent on a particular activity, the number of activities performed by particular students, what data is a student interested in, etc. The goal of this paper is to describe the application of many-valued formal concept...

Simulation and testing technology of sintering flue gas recirculation, under Arcelor Mittal S.A.Galati proved its superiority compared to conventional sintering technology by: lower specific consumption of coke by approx. 10 to 15%; lower costs agglomeration; reduction of pollution due to: decrease of specific volume of exhaust gas to the basket by 45 - 50% ;decrease in the emission of SOx to basket approx. 55%; lowering NOx emissions from basket approx. 50%; CO2 emissions drop to approx basket. 20%; retention lay...

Water serves as a medium for fundamental process phases (e.g. tanning and dyeing) in leather production. The reduction of water consumption per product unit has been an environmental priority for European tanners over the years. This is possible mainly through the setting of continuous improvement objectives aiming at developing water efficient processes and water recycling technologies. The paper analyses the pickling operation, for bovine hides processing. The aim is to develop an automation system which will re...

The most important duties of the marine engines supervisors regarding to the operation of diesel marine engines is maintaining the serviceability of cylinder liners and piston rings of ship engines which includes extremely important process of running in piston rings an liners running after overhauling. During this process proper engine load to be maintained. and cylinder liners lubrication to be properly adjusted. This process can better monitored to avoid mistakes with procedures and can reduce cylinder lubricat...

The common fig tree (Ficus carica L.), is one of the oldest cultivated Mediterranean crop, is a useful genetic resource for commercial cultivation. The aim of this study was, the analysis of genetic diversity of the species Ficus carica from western Romania. Genetic diversity of fifteen fig-tree cultivars collected from three Romanian west regions were investigated using Inter Simple Sequence Repeat (ISSR) primers. Using a set of primers, the most informative ones were selected for their ability to generate ISSR p...

One of the species with the negative impact for corn crops in Europe is the coleopteran insect of Diabrotica virgifera virgifera (LeConte). The invasiveness but also the damage caused by adults can reduce the production of corn grain visible. By monitoring activities organized at local or national level (in Romania) often made confusion because coloristic variety intraspecific observed in insect populations. To identify the causes of color variability morphological studies were done on several samples present in d...

The study aimed to evaluate the variability of some morphological characters and the correlations between these at black pine. The biological material was represented by four populations of black pine, two of southwestern Romania (Herculane and Svinita) and two of central Greece (Kerasia Evia and Ano Polidrosos). The experimental data were collected by biometric measurements conducted "in situ" and were statistically processed in order to determine the variability within the populations, but also the correlation c...

The aim of this paper was to investigate the effect of defatted rapeseed flour addition from which proteins were extracted (DRF) on quality characteristics of bread as a finished product by baking test, rheological and microstructural examination. The dough rheological properties were determined by using the Alveograph device and its microstructure was analyzed by using the epifluorescence light microscopy (EFLM). Also, there were conducted analyses on the bread quality prepared from composite flour (wheat flour 6...

The Pectobacterium bacteria are classified among the most economically important pathogens for growing potatoes. In recent years, an increase in diseases caused by these bacteria could be observed. The purpose of this work is the study of the antibacterial activity in vitro of five plant extracts namely grains of black cumin (Nigella sativa L.), cloves (Syzygium aromaticum), Eucalyptus camaldulensis, wild carrot (Daucus carota L.) and thyme Numidia (Thymus numidicus), against the strain Pectobacterium collected in...

Urban areas face the problem of traffic congestion. City Centers are the destination of many people traveling to work, school or business every day. The spatial structure of a city is not fixed in space, but is subject to constant transformations associated with a vast array of social, economic and environmental processes. One of the processes that we can observe in Polish cities is the increasing number of parking spaces. In the urban planning of the development of large Polish cities, the trend of reducing car t...

The purpose of the study was to present detailed the stages in achieving the documentation necessary to upgrade the infrastructure of a road, after the landslides which led to the erosion of embankments. The chosen methodology consisted in designing and analyzing the topographical, geological, hydrographic, climatic studies and seismic classification of the area. Following the completion of basic works were proposed other works necessary to remedy the problem, conjunction with legislation to obtaining the Environm...