Browse

Even if EU traditional agriculture is based on a considerable part on livestock enterprises activities, and many products are sustaining the traditional activities, livestock production is the largest source of greenhouse gases, high water usage, driver of deforestation, loss of biodiversity, land use, European Union (EU) is the biggest food importer and the second food exporter, spend around 40% of its budget on Common Agricultural Policy in detriment of other sectors. This paper work aims to emphasize the impact...

Slag is one of the by-products of energy industry which is suitable for secondary industrial processing. Although slag has been successfully used in industrial production for several decades its use does not achieve the level of its potential. This work describes the improvement of mechanical properties of alkali activated binders пїЅ geopolymers made of slag. The effect of mechanical activation on mechanical properties of geopolymers was examined. Mechanical activation was made with ball mill and different time o...

The growth in economy is reflected also in the rising demand for freight transportation. The freight railroad industry play an important role being a mainstay of transportation for basic industries. New projects are currently developed for increasing the capacity of transportation by rail from large coal and mineral basins to the places of consumption or within the processing plants. The combined heavy load and usage cycles imposes severe stresses on the components of the freight cars. To this purpose a comparativ...

The aim of the study was to investigate the effect of microcrystalline cellulose fibers on the mechanical properties of flexible starch based foams. During the experiment the foams obtained with potato starch with the addition of glycerol as plasticizer were tested. The starch was blended with glycerol in laboratory mixer with 30 wt.% glycerol addition. The process of making foams have been carried out by microwave heating in laboratory microwave oven. To improve the mechanical properties of starch foams to the mi...

Construction, rehabilitation and maintenance of land communication use large quantities of material from processing plants (earth, natural aggregates including filler and binder). It is noted, however, that their diversity is limited. It is recommended to introduce and promote manufacturing technologies that have a low environmental impact. An artificial material used for road structure is the steel slag from steelworks. Ferrous metallurgical slag processing plant benefits in terms of environmental protection, in ...

The study solves actual modern problem for obtaining polysilicate solution (as a mineral component of clinkerless binder) based on low-quality siliceous raw materials. A mechanochemical synthesis method of sustainable colloidal silica sol (with a particle size of 5-25 nm) is proposed, as well as a grounded choice of grinding parameters is made. Influence of protolytic properties of liquid phase on dispersion speed, aggregate and sedimentation stability of the silica sol are studied. The obtained dependence of the ...

The paper tries to make a study on the kinematics of the mechanisms involved in robot composition, the theoretical foundations of the dynamics of industrial robotic systems and the structure of a mechatronic micro-position system used in manipulation operations in order to optimize and correct the performances. The robot is a complex automated system that has the role of manipulating the parts and tools, replacing the action of human. An industrial robot is a system that does not operate in isolation, it communica...

The work deals with promising trends in the formation of medically social institutions depending on the accounting of factors in architectural design. The methodology for determining the functional planning structure of the type of buildings studied is based on the aggregate accounting of 4 factor groups, three are basic: natural-objective, subjective-technical, subjective-cultural and the fourth is the complex group. All round use of the foundations for socially specialized institutions will allow a systematic de...

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...

P systems are powerful computational devices, whose structure and functionality are inspired by living cells and organisms. P colonies are one of the types of P systems working with objects. They are formed from one-membrane agents placed in the shared environment and they use very simple rules. It was proved that P colonies are computationally complete devices. In the paper, we investigate the application of P colonies to simulate logical operators. It is obtained in a constructive way. In the first steps we show...

The paper presents a MEMS-INS/GPS data fusion algorithm based on an adaptive neuro fuzzy inference system for the prediction of the navigation solution errors during GPS outages. The study was performed during the second stage of a research project related to the structural design of a data fusion intelligent algorithm based on an adaptive neuro-fuzzy inference system and Kalman filtering, for the prediction of the positioning errors during GPS signal outages. In this stage, the project research team targeted to r...

According to Johnson LairdsпїЅ Mental Models Theory, people develop internal representations of the natural world пїЅ mental models пїЅ that they use to interact with the world and understand the phenomena around them. Having this in mind, we could understand that students develop their knowledge through the construction of mental models, which help them to develop scientific reasoning and make decisions, being the basis of individual behaviors. In this context, it is assume that the use of methodologies that enab...

Since 1860, phenol has been in production, with its basic use as an antiseptic. During late 19th century and thereafter the use of phenol has been further extended to the synthesis of dyes, aspirin, plastics, pharmaceuticals, petrochemical and pesticide chemical industries. In fact, by 2001, the global phenol production has reached an impressive 7.8 million tons. Among the different organic pollutants in wastewater, phenols are considered as priority pollutants since they are harmful to plants, animals and human, ...

The aim of this study was to investigate the process of accumulation of some toxic metals in Salvia Officinalis cultivated in-situ and also in controlled laboratory experiment. In situ experiment was located in a highly polluted area, situated in the proximity of abandoned gold mine and a waste dump. In the study were collected and analyzed four different samples of Salvia Officinalis, grown on polluted soil situated in different geographic directions around a waste dump. The analytical investigation indicated tha...

Various metallurgical slags are generated in metal extraction, refining and alloying processes. Due to the large slag quantities and the strict erenvironmental regulations, recycling and utilization of these slags are an attractive alternative in order to reduce and eventually to eliminate the disposal cost, to minimize the related environmental pollution, and to save the resource conservation.The global warming effect and natural resource saving are the general environmental topics nowadays. In addition, the land...

For the last few decades the information technologies have become an inseparable part of the modern society life. Their level is one of the key indicators of the countryпїЅs scientific and technical progress, which determines the quality of life of the citizens. Today the thing is that an effective functioning of national economy, research or services sectors branches is impossible without their integration with advanced information and (or) communication technologies. Due to the integration we have such synthetic...

The results of methane and total hydrogen sulphide detection in bottom sediments of small rivers as well as fresh and slightly saline water bodies of the Eastern Donbass are presented. The content of CH4 in sediments of water bodies of Eastern Donbass varies between 0.04-26.8 ?g/g wet mass (w.m.), ?H2S content varies from to less 0.005 than 4.02 mg/g w.m. The maximum concentrations of methane were recorded in the bottom sediments of the Glubokaya River (Station No. 7), while the maximum of the content ?H2S is conf...

The authors propose a method for automated processing of seismic data obtained in high-stress rock masses structured as hierarchy of blocks with a view to detecting seismically active zones and seismic event clusters within a mine field. The processing algorithm is developed based on the statistical theory of classification and cluster analysis. Suitable for zoning of seismic data, FOREL family algorithms include algorithms based on the idea of incorporating objects in the zones of their highest concentration into...

Structure-independent databases are widely used in different spheres for specific tasks solving. Nevertheless, their main problem is a low efficiency that prevents them to be in progress. This work is concerned to the problems associated with data insertion. The causes of this low performance can be called the use of the existing object method of procedures creation and heterogeneity of the data insertion procedures creation process. This process uses object representation form for process of data insertion proced...

The paper presents a new method of determining the energy consumption for vibratory crushing. Using the laboratory vibratory jaw crusher with kinematic actuation of the jaws, the study of determining power consumption while crushing limestone and diabase was conducted. During the study, electrical energy used on the crushing process was measured as a function of changing design and kinematic parameters of the vibratory crusher, i.e.: jaws stroke, the outlet gap size and frequency of jaws vibration. The article pre...

In this study preparation of oil absorbent composite is described. Polyacrylic acid / Na-montmorillonite composite was synthesized by polymerization of acrylic acid on the surface of the sodium bentonite. FTIR spectrum of absorbent was recorded, and it was shown that polyacrylic acid reacted with bentonite layers. In this work the swelling kinetics of obtained composite was investigated and the main kinetic parameters - the swelling rate and the swelling kinetic constants were determined. In addition to demonstrat...

The work given has been aimed at consideration of methodical approaches for the feasibility study of perspective in mineral deposits development, and based on it, preliminary ranking of criteria which should be applied relative to the Arctic solid mineral deposits. Authors used a formal logic method (analysis synthesis). It was revealed that both the domestic and foreign approaches cannot be applied directly for the feasibility studies of the Arctic solid mineral deposits because they consider the arctic condition...

The article presents selected results obtained by using of electrical resistivity tomography method in searching of different, mostly anthropogenic objects at shallow depths. The anticipated depth of the object is up to 20m. These objects are relatively small with dimensions up to maximum in first meters in diameter. In terms of the shapes of these objects it is possible to define two groups. The first group consists mainly of the objects whose shape can be replaced by a vertical or horizontal cylinder. The second...

Based on the lighting systems efficient utilization strategies analysis of lighting systems efficient utilization and through its synthesis with the options of intelligent control were for a design and calculation of lighting systems analyzes of the reference shop energysaving lighting system designs were carried out. The results of the rationalization procedures and measures that have been made for the purpose of a reduction of energy demand of industrial operations lighting systems, were the basis for a developm...

Water filling of remaining gaps of lignite open-pits are used frequently worldwide, is economically acceptable, having long-term benefits, regardless of the use of pit lakes. Choosing this type of use leads to appearance of a water surface, which may increase, for example, the ecological, productive, cultural value of both the landscapes and terrains. However, not every remaining gap can be flooded for extremely diverse reasons (slope stability issues, climate, regional development strategy, etc.). The paper propo...

Although the majority of the EU countries explore controlled waste management landfill sites for alternative electrical and thermal energy resources it has been found that some of these infrastructures exhibit several instability situations and environmental problems due to lack of landfill maintenance or inadequate waste separation, which may result in post closure inefficient biogas exploration or in reduction of potential landfill mining [1; 2]. In Portugal, there are presently several landfills in exploitation...

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 ...

Currently, terrestrial laser scanning is one of the most common method of measurement used for registration of the shape of objects. This technology enables in short time to designate huge collections of spatial data, known as point clouds. Due to the amount of occupied memory, storing large data sets becomes now a big problem. One solution is to create algorithms that allows to reduce the amount of recorded data without losing the essential spatial information. On the market there are mostly paid programs, that a...

The results of research conducted in the field of development and application of mobile systems in problems of monitoring extreme weather situations (EWS). The proposed methods and development models take into account modern technologies like Map Reduce, Hadoop Java API, use of a precedent knowledge base about similar situations. The study places considerable emphasis on ensuring the reliability of the database and knowledge. Implementation of monitoring involves the use of a cloud of drones and other information ...

Soil erosion is a naturally occurring process on all land. The agents causing soil erosion are water (especially on sloping land) and wind (especially on horizontally land), each contributing a significant amount of soil loss each year. These factors are responsible for about 84% of the global extent of degraded land, making excessive erosion one of the most significant environmental problems worldwide. Soil erosion is a slow process that continues relatively unobserved, or it may occur at an alarming rate causing...

The object of this paper is represented by the analysis of a grid foundation for a light reinforced concrete structure. The need for this kind of analysis was imposed by the foundation ground conditions. In the case of sites presenting differentiate foundation ground conditions in the perimeter of a construction it is necessary a detailed analysis of the foundation conditions of the site and also, the behavior of the ensemble of the entire structure. So, is stent an adjustment of the foundation solution to the sit...

The paper presents and analyzes the experimental results obtained by the welding reconditioning of a pressure vessel made of 14CrMoV4, a Romanian trade of steel, which is the equivalent of 13CrMo4-5, in the European norm 10028-2/2009, steel, which functioned for a long period of time in the energetic industry. The welding process used for reconditioning is robotized gas metal arc welding (GMAW). A series of samples were realized using different technological parameters in order to obtain different geometrical conf...

The main theme of this article is a problem of storing underground utilities in different types of country. Supply services must meet dissimilar requirements for placing in rural or in the urban zone and respect all limits, which are binding in the known area. Technical security of urban settlement is a significant part of today's modern society, as is the flawless and reliable operation of water, energy and telecommunications networks. They all are a commonplace in each urbanized land and have an important impact...

Exploitation of groundwater deposits exerts an influence on the state of the hydrogeological objects and the environment at large. The special study is required for the areas with the limited-use surface water. Province of Kyzylorda is one of such regions in Kazakhstan. Its water supply is mainly realized by use of underground waters of Kyzylzharminski deposit. Methods of mathematical modeling play an important part in the process of studying the hydrogeological objects, which are subject to the effect of high tec...

Pig breeding is a profitable activity for small and large farms, being currently influenced in an increasing extent, by the international competition in this area. As a result, pig breeders must keep pace with changing technologies and production techniques to maintain the competitiveness of their farms. Also, it is necessary to take into account the new European regulations, particularly those relating to the environmental protection, the comfort of animal and food safety. The objective of this paper represents t...

Innovative methods in the investigation of low-grade uranium ores were tested. As the individual ore components in the rock are optically undetectable, we focused on the detection of selected elements (U, Zr, Fe, Nb), their possible associations and distribution. For this purpose, mineral mapping of sample surface was used. The studied samples are uranium-bearing sandstones with remarkable elemental and mineral compositions. Low concentrations of the main ore elements and the small size of mineral phases (in micro...

Soil organic matter is fundamental for the long-term sustainability of agro-ecosystems. An experiment was conducted on the experimental plot aiming to determine if organic matter represented by mulches with wool wastes and wood chips could induce changes in soil microbial community composition and activity and effects on improvement of soil suppressiveness to plant pathogens from the genus Fusarium. The soil was Technosol and the organic culture of edible roses was planted in 2015. In the summer of 2016 the soil w...

During summer field trips were collected several cores from Lake Rubskoe. Cores length is about 6 m and maximum age approximately 13 Ka according radiocarbon dating. For investigation chosen core ?4 (56.72545пїЅ N, 40.60657пїЅ E), were sediment sequence not destructed. Core was divided into 2 cm samples. Thermomagnetic curves measured for every fifth sample. The rate of heating was 100пїЅC/min. The measurements made in a constant magnetic field пїЅ 200 and 400 mT. We have got thermomagnetic curves of the first and...

This paper presents macro- and micromorphological, mineralogical and physicochemical characteristics of solonetzic processes that developed within a 14-cm-thick plough (P) layer of non-ameliorated Solonetz over a 50-year-long period of its post-agrogenic evolution. These processes have resulted in the formation of a microporofile with micromorphological features of eluvial-illuvial differentiation within the former plough layer. The mineralogical analysis of particle-size fractions (?1, 1пїЅ5, 5пїЅ10, >10 ?m) of t...

Due to the global problem of desertification, the demand in the diagnostics of the soil forming in the desert conditions is increased. The desert varnish and the vesicular (porous) crust horizon are distinctive morphological features of desert landscapes and, at the same time, generally recognized features of desert soil formation, being commonly referred to as the yermic horizons in different sub-groups within reference groups of desert soils. The objects of the present study were the surface horizons of vesicula...

The microseismic monitoring is a method of monitoring of fracture propagation during hydraulic fracturing process. Hydraulic fracturing is a method of reservoir stimulation used especially for unconventional gas recovery. A matrix of several thousand geophones is placed on the surface of earth to record every little tremor of ground induced by fracturing process. Afterwards, the signal is analysed and the place of tremor occurrence is calculated. The detection of microseismic event is not trivial especially in noi...

Despite the common application of a wide variety of IT solutions in organisations, one may relatively frequently come across processes under which information is manually processed by employees, and even if specific IT tools are used for the processing, the extent of operations conducted manually remains considerable. In numerous cases, similar processes may be supported by tools created using spreadsheets. Such tools can be developed by means of a rather narrow array of embedded spreadsheet features and mechanism...

In modified Tube reactor, where the average concentration of solids amounts to 0.1- 0.2 t/m3, i.e. the conditions for residence time are long enough for the thermal combustion of biomass waste and coal and extensive gas mixing with 60-70% excess air so enhancing biomass combustion and heat transfers to the boilers. It is necessary to create conditions of internal circulation without the transported coal and waste in modified Tube and boiler, 90-95% combustion yield were observed at the end of combustion. Total hea...

This paper presents a study of performance evaluation of some fluid cement-based mortars containing mineral admixtures used as structural bonding material for fixing reinforcing steel bars in hardened concrete. The paper includes the developing of performance anchoring mortar for post-installed rebars based on ordinary blended cements. A series of standardized tests were performed within the experimental setup with the objective of assessing the performance of the mortars in terms of fluidity, cohesiveness and ear...

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...

A new mineralogical mobile phone application was created named Mineralmicr. Mineralmicr is an application that includes for the first time in a mobile phone application or computer program or in general on internet a database of 60 common minerals under petrographic microscope. In these videos the optical properties of each mineral are explained in detail using English subtitles. Mineralmicr is an application in which the user can identify the minerals under petrographic microscope by using nine specific filters t...

The Vanavar Formation is a terrigenous horizon (1 to 200 m thick) at the boundary of the Tonian-Cryogenian and Ediacaran-Fortunian carbonate complexes. The geological position of the Vanavar Formation and the intensive facies variability do not permit a clear characterization of the conditions for its accumulation. Additional interest in the study of Vanavar Formation caused by its oil-and-gas bearing deposits. The objects of research are the core samples selected from well ? 3 of Pridutsky area. The mineral and c...

This article discusses a comprehensive study of the sand samples, which were selected on the Arabian seashores (Kovalam, Kollam, Kerala, India), and produced ilmenite, zircon, garnet and monazite concentrates (Chavara field, Kerala, India). As a result of versatile research, realized in the laboratories of KFU, which represented mineral and radionuclide composition of the studied samples, marginally represented La, Yb, Hf. Discovered free of impurities zircon, as well as zircon of the hafnium species. The studies ...

Bitumen deposits in Permian sediments in the Volga-Ural region are interesting as sources of unconventional oil. The reservoir rocks in the bituminous deposits are sand and sandstone of varying degrees of strength. For the prognosis of productive areas, it is important to study the peculiarities of the composition of bitumen-containing rocks and the mechanisms of localization of oil matter in them. These processes are closely related to the conditions of formation of the surrounding rocks. We examined samples of b...

The main goal of our paper was to determine the consequences of selenium intake (0.2 ppm as selenium selenite) on mineral profile of some broiler chicken (Ross) tissues/organs. Scarcity of studies on reference ranges for various minerals in different tissues was the secondary reason of our study. Our results highlighted significant variations on minerals content from studied samples: blood пїЅ Cu, Mn, Fe; faeces пїЅ Cu, Mn, Fe, Mg; muscular stomach пїЅ Fe, Zn, Ca; liver пїЅ Fe, Mg, Ca, Na; kidney пїЅ Cu, Mg, Ca, N...