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This article discusses the possibilities of recycling waste material generated using 3D FDM or FFF printing technology and its use in the re-production of printed material. Additive technology is an increasingly popular method for the rapid design of components and machinery parts. It enables creating prototype components and assemblies relatively quickly. This makes it possible to search for the right design of a given component and to choose from several options (e.g. finding the correct shape in ergonomics). Ho...

Waste poses a growing problem is the contemporary world. The volume of household waste per resident continues to increase at a staggering rate. In line with the EU requirements, growing proportions of waste should be recycled, and Poland is expected to recycle 50% of its entire waste stream by 2020. Biological waste can also be recycled, but the recovery rate for this waste fraction is close to zero in Poland. The above applies particularly to biological waste from households. The quantity of OFMSW generated by a ...

The cupola furnace is a most widely used foundry furnace for melting of cast iron. Besides main product, cast iron, also secondary products are formed in cupola furnace. They have a character of secondary raw materials, or industrial wastes. Under the laws applicable to waste management, the waste producer is obliged to ensure their disposal without negative environmental impacts. Typical, and main secondary product of cast iron production is a cupola furnace slag. Its occurrence is approximately from 40 to 80 kg ...

The companies need to change in order to be competitive on the current market. There are multiple ways to change in order to face the market. One of the most efficient instruments is organization development which refers to increasing the individual, group and organization performances, to improving the organization ability to respond efficiently to outside changes. The organization development refers to increasing the internal capabilities, ensuring that the organization structures, human resource systems, posts,...

The resins extracted from heavy oil sample from Ashalcha oilfield (Tatarstan, Russia) and the products of Co-based catalytic and non-catalytic aquathermolysis are investigated. Saturates and four subfractions of resins (R1-R4) are extracted by liquid adsorption chromatography method with individual and solvents. Fractionation method leads to obtain more detail information about the structure of high molecular weight compounds due to subdividing large molecule and its aggregates into small ones. The extracted subfr...

Use of fish meals or oils in the poultry diets has made it possible to increase the level of long chain n-3 fatty acids in meat. When meat is enriched with polyunsaturated fatty acids (PUFA), all vegatble fat sources are less effective than marine fats. This effect results due to the content of n-3 fatty acids (FA) because marine fats or oils are composed of eicosapentanoic acid (EPA) and dosahexaenoic acid in generally a higher proportion whereas vegatable oils contain linolenic acid (LNA) whose conversion to lon...

Use of fish meals or oils in the poultry diets has made it possible to increase the level of long chain n-3 fatty acids in meat. When meat is enriched with polyunsaturated fatty acids (PUFA), all vegatble fat sources are less effective than marine fats. This effect results due to the content of n-3 fatty acids (FA) because marine fats or oils are composed of eicosapentanoic acid (EPA) and dosahexaenoic acid in generally a higher proportion whereas vegatable oils contain linolenic acid (LNA) whose conversion to lon...

The impact of civil aviation objects on the environment is characterized by a number of features related to the fact that this kind of anthropogenic activity is rapidly developing, taking on increasing importance in humanity`s life. Also, civil aviation is one of the most important connecting elements of international relations. Improving the efficiency of fuel resources applying, which is one of the priority directions for the country's economy development, increases the environmental safety of the investigated o...

The paper presents the results of the study of modern movements of the Earth's crust in the southern part of the Nizhnekanskiy massif according to global navigation satellite systems (GPS/GLONASS). The article presents preliminary results of geodynamic zoning of the Yeniseisky site based on the methods of system analysis. Nizhnekanskiy massif is located at the junction of major tectonic structures - the Siberian Platform and West Siberian Plate. Its southern part is characterized by stable tectonic regime, the ave...

The tectonic interpretation of crustal seismicity data have been recently performed for the central part of the Moesian Platform, having as main target the in-depth development of the Intramoesian Fault[1]. Seismological data for Romania, Bulgaria and the western Black Sea, compiled from published local, regional and global earthquake catalogues and merged into a database, were used to analyze the crustal seismicity (0?40 km) on multiple N-S trending sections across the North Dobrogean Orogen and the eastern part ...

We have developed an online information system of mechanical recanalizations which is used in stroke centers in Czech Republic. The application is technically based on HTML forms, PHP and MySQL database. The system is online, independent on operating system and with possibilities to extend the functionality, there are main benefits. The database of mechanical recanalizations is a useful tool for long-period studies in neurosonology. Practical using, goals and benefits of the system is discussed in the first part o...

Soil animals by their size are usually subdivided into 5 groups: nano-, micro-, meso-, macrofauna and megafauna. Mesofauna is the most numerous part of soil animals. The mesofauna is represented by mokritsa, enchytraeids, insects, centipedes, spiders, mollusks, etc. Soil animals occupy, basically, the upper horizons (up to 20-40 cm deep), in dry areas only certain species penetrate to a depth of several meters. Mesofauna, along with other soil organisms, can be used as a bioindicator. In addition to the high abund...

Combination of domes and synform structures is a normal structural paragenesis of the Precambrian granulitic terranes. Structure of ore fields depends on deformations, related to granitic-domical tectonics. Deposits are usually confined to synforms framing domes. Such localization indicates motion and concentration of ore material in connection with tectonic transport on shoulders of emerged domes and transformations of rocks as a result of effect of rheomorphic granitoid mass [1]. Deposits of iron (with cobalt an...

The creation of footings and foundations with an increased load capacity is a crucial task of modern geotechnical construction. Among all the existing technologies pertinent to the construction of such foundations, underground structures, such as bored piles of large diameters, are most strongly sought-for. The existing construction technologies, in which such piles are used, make it possible to realize substantial values of load capacity (Fd). This parameter may be increased just via changing the length and diame...

Results of research into the choice of rational parameters of thermal regime in coal mine workings of the permafrost zone which are minimizing energetic and economic expenses of creation of normative parameters of mine microclimate are presented. It is determined that there is an optimal temperature to which the air in the coal face should be heated. It is demonstrated that the most rational method of air heating is the one employing heating devices distributed along the length of the coal face. Basic criteria of ...

In the polluted area with emissions from Zlatna metallurgical plant, more than 50,000 ha of agricultural and forestry land has been affected by pollution over a time period of 200 years. Approximately 5,000 ha from these lands were severe and extremely polluted. The vegetation was completely destroyed on more than 2,000 ha, leading to intense erosion processes. The forest vegetal cover was completely destroyed, and the trees had some dry branches, spots on leaves, bark burns and even completely destroyed, the oak ...

The paper presents the results of the experiments on a sterile dump resulted from surface mining of lignite in Rovinari, Gorj County, where, was been tested the effect of a variety of fertilizer as: liquid fertilizers based on humates extracted from lignite, complex mineral fertilizer (N105 P105 K105 and N150 P150 K150), farmyard manure (20, 40 and 60 t/ha), compost (20, 40 and 60 t/ha), and the mixture of the two types of organic fertilizers with mineral fertilizer. Two test plants, corn, and sunflowers have been...

The article concentrates on relation of mineralization, granitoid magmatism and dikes in ore fields of the Eastern Yakutia with cassiterite-sulfide mineralization. It is shown that, the main ore bodies are confined to places of intensive development of dikes and do not significantly concur with the time of granitoid formation. The melts that formed dikes and generated into metasomatised mantle, was the main source of tin and accompanying elements. When centers of granitoid and dike eruption are the same, these mel...

This paper presents several issues regarding the dynamic behaviour of the pedestrian footbridges structure under the action of general loads generated by the pedestrians? displacement, together with the correlated traffic comfort of the pedestrians crossing the structure. The footbridge crossing comfort criterion requires the inclusion of vibration frequencies and accelerations of the structures in certain limits so that the vibration amplification or resonance is avoided. The paper puts under investigation six fo...

Coals, being heterogeneous matter in general have very complex composition. In South Africa, coal is mainly utilized for electricity generation followed by metallurgical and industrial usages. During the combustion of coal as the main utilization process, there are different chemical components released and these have been found to be the cause of many challenges of using coal for fuel. Out of many challenges of coal utilization, there is the release of SOx, NOx and other harmful minerals, which are highly attribu...

The paper deals with the negative effects of mining on the transport network in the Moravian-Silesian area, especially is focused on problems reflected in construction layers of transport-related structures (railways, roads, area storage and handling areas). With the extraction downturn, the sources and objectives of transport have changed including the characteristics of transport flows of all traffic roads and connections. Various measures for all transport modes situated in Moravian-Silesian region are identifi...

The Baltic Sea is suffering from extended surplus of phosphorus, nitrogen and other pollutants. It causes diminishing biodiversity and increased eutrophication (mainly due to nitrogen and phosphorous in various substances). The common effort in the region is environmental standpoint in sustainable circular economy. Oil pollutants, heavy metals, organic substances are being released to the Baltic Sea and consequences for maritime environment are serious. However, Baltic Sea Region is one of the most innovative regi...

A computer programme aiding the diagnostics of the devices in the marine power plant and operation management of this power plant on the fishing vessel of medium size have been characterized. The programme is installed on the Dutch fishing vessels (Fig. 1) of 40 m length and gross tonnage just above 400 RT, with 5-7 persons of crew (skipper, mechanic and fishers). Such vessels are usually dedicated for fishing of demersal fish. Particular modules of the programme used both for diagnostics of devices and organizati...

Romania has realized that potential risks arising from anthropogenic activities with a possible significant impact on human health, soil quality, groundwater and surface water. Therefore concerns for soil protection, sustainable use of its conservation and restoration capacity where possible / necessary to its fulfillment as many functions show a significant upward trend. In the process of harmonizing national policies with the European Union policies and transposing and implementing EU rules and regulations, the ...

The permafrost zone (cryolithozone) is undergoing now an intensive anthropogenic influence. The strongest influence of the linear structure could be heating of the upper part of the ground layer, thawing of ice inclusions, weakening of the soil and surface subsidence. The strongest risk for constructing engineering structures within the southern part of the cryolithozone results from peatlands because of peat soil with high ice content. The aim of this work is revealing main interpretation criteria of peatlands co...

Analysis of forestry fund and especially of the silvicultural fund represents more and more a multidisciplinary subject, interesting for the purely theoretical sciences and also for the sciences with wide practical application. One of the characteristics that generate interest is the spatial-temporal ?mobility? of forests, and also the possibility of satellite approach, by means and methods specific to remote sensing. The area of interest, a case study in this paperwork, is extended from the mountain region to the...

The temperature at the Earth?s surface can be estimated by ground-based methods or satellite remote sensing data. Satellite remote sensing is the only means of obtaining longterm homogeneous series of land surface temperature data. The network of ground-based observations usually is quite rare, so it is important to obtain information by remote methods. From the values of the thermal infrared spectral bands, it is possible to determine the radio brightness temperature of the underlying surface. The compilation of ...

Magnetic nanoparticles (MNPs) of iron oxides are increasingly used in many laboratory and medical applications such as hyperthermia, magnetic resonance imaging or magnetic drug delivery. Popular in medical applications are magnetite (Fe3O4) and maghenite (?-Fe2O3) nanoparticles. They have gained a great interest because of their low toxicity, biocompatibility, simple separation methodology, and low cost of production. A novel magnetic hydrogel adsorbent based on gellan gum and Fe3O4 (GG/Fe3O4) was synthesized and ...

In the present work, UV-Fenton, UV-H2O2 and Fenton processes were employed to treat a leachate from the municipal solid waste landfill of Astana (Kazakhstan). Each experiment lasted 120 minutes, and the treatment efficiency was assessed through total organic carbon (TOC), total nitrogen (TN) and color removal. The total volume of the treated solution was 250 mL and an annular UV (254 nm) photoreactor operated in batch recycle mode was used in the case of photochemical treatment. The landfill leachate, which curren...

The development of renewable energy sources increasingly affects the shape of both energy policies and the construction of the power system of EU Member States. This is mainly due to the fact that successive legal regulations created in the European Union are increasingly promoting the so-called clean energy sources. The climate policy of the European Union, going towards "low-emission" or even "zero-emission" forces the necessity of a far-reaching reconstruction of the Polish National Power System, which we were ...

In this paper, authors address a topic of great interest both for the specialists from the economic environment and for the general public in the European Union, based on specific data for the Romanian power market. The issue of reducing environmental pollution or greenhouse gas emissions is a hot topic in the today world, affecting virtually every pointof the world. These targets can also be achieved by increasing the share of electricityproduction from renewable resources. However, the population of Romania, and...

Today, the increased focus on the Arctic zone is influenced by a number of reasons: The Arctic zone of the Russian Federation (the Russian Arctic) has the potential to become a new oil and gas region for our country; the military and strategic importance of the Arctic; the future outlook for the Northern Sea Route. The development of the Russian Arctic aims to enhance the social and economic growth of the region in line with the priorities set forth by the state policy and based on the range of socio-economic issu...

In the era of the increasingly implementation of renewable energy sources in the electrical energy supply, the expansion of a sustainable energy industry must be promoted the resulting increase in storage requirements. The Gravity Hydro Power Tower Energy Storage (GHPTES) is an innovative hydraulic energy storage system based on pumped storage technology. It consists of a vertical cylindrical cavity, filled with water, in which moves an overload piston from steel at smaller storage systems or from rock at large st...

The effects of global warming are becoming more and more felt by changing climatic conditions across the entire surface of the earth. Thus, in some regions of the Earth's surface, catastrophic floods have begun to occur more and more often due to the increase in both the occurrence frequency and the intensity of torrential rains. In order to reduce the flood damage, it is necessary to prepare hazard maps and flood risk maps. These maps are prepared using hydraulic simulation of the flood propagation on the waterco...

Poland's membership in the European Union obliges us to implement the rules binding in the Member States and to the preservation of the principles of sustainable development understood as the integration of economic, social and legal activities through the implementation of new technologies for environmental protection. In order to fulfill the obligations arising from the Directive of the European Parliament and the Council 2010/31/UE of May 19, 2010 on the energy performance of buildings, from January 1, 2017, ac...

The reinforcement of ceramic composites with the help of carbon nanotubes (CNTs) is used to increase and stabilize the mechanical properties of composites based on silicon carbide, such as strength, fracture toughness and modulus of elasticity. To save the properties and reduce the synthesis temperature of ceramics based on silicon carbide, an aluminum-magnesian spinel is introduced into the matrix. A nanocomposite with a matrix of silicon carbide (SiC) and spinel (MgAl2O4) and with a CNT content of 1-3% by weight...

Research institutions and academia play an important role in developing new methods for disaster management and advancing the state-of-the art in risk reduction. In the case of natural disaster studies, fundamental research and theoretical approaches can be directed towards the development of new tools and technologies with direct applicability in the management of emergency situations and in risk mitigation. What needs to be considered by all those actors who can contribute to strengthening the response capacity ...

The article presents scientific researches for level of soil contamination by deicing agents at the roadside close to the railway in the city of Arkhangelsk (Russia). The selected sections of the motor road are located above and below the railway embankment. The paper describes the procedure for sampling and determining content of the chemical elements in the roadside soil. We have estimated the content of the chemical elements in the composition of deicing agents in the roadside soil. We have examined and determi...

The geo fluid mechanical model of the natural and technical system "the store-the protecting construction-the geological basis" which in the program PLAXIS complex has been realized in a computer 3D model has been developed for a research and assessment of reliability of the store of liquid industrial wastes. For each component of model it was set, taking into account basic data, the corresponding mechanism of deformation: elastic-plastic, elastic and viscous-plastic, filtration consolidation. As the changing infl...

The solving of the project of the Ministry of Agriculture of the Czech Republic dedicated to sustainable agricultural management in the North Western Bohemia is under way from 2015 to 2018. The main attention of the 2017 and 2018 research is devoted to the research of experimental areas retained to the natural succession. The second research problem was the development of the geological parks as a part of the restoration activities. The last part of the paper is the brief information about first step of historical...

New results of the main bentonite localities mineralogical research in the Most Basin area are the main topic of this paper. The main attention is devoted to the quarry Rokle near Kada? city. The first part of this article briefly summarises geological situation of these localities, parameters of the mined raw material and possibilities of bentonite application. The second part of the paper describes result of the long term mineralogical research of these localities. The last part of this article presents new mine...

The target of this article is the presentation of the first steps of solving the project No. TH03020368 from the programme EPSILON titled ?The optimisation of the shape and material of ground and mining machines research?. The main topic of this article is the optimization of the tooth shape and primarily the optimization of the materials used for manufacturing of cutting bodies of the ground and mining machines. This research is necessary for increasing of efficiency of mining process in conditions of the Most Ba...

The production of a titanium sponge obtained by the reduction of titanium tetrachloride by magnesium is accompanied by the formation of a huge amount of chloride waste. They are annually stored in landfills - storages, polluting the environment. Consequently, one of the topical problems of titanomagnesium production is the processing of chloride waste. In Kazakhstan, there are a variety of sources of chloromagnesium raw materials for the electrolytic production of magnesium, but they are not used in the magnesium ...

Separation processes are highly influenced by medium in which separation is performed, particularly its rheological properties. One of the most important rheological parameter of medium is viscosity. Many researchers have noted the primary role of viscosity in separation processes. During classification of milled raw, with an increase in the viscosity of the medium (up to a certain limit), the overall productivity of the hydrocyclone increases and the distribution of liquid volumes leaving through the apex and vor...

In the present study are presented the causes and consequences of a bacterial disease signaled to the silver carp farmed in polyculture with Cyprinids and other fish species in ponds. In the spring of 2017, the presence of a bacterial disease of the species Hypophthalmichthys molitrix cultured within the Fish Culture Research and Development Station Nucet, Romania, was first reported. The illness caused the weakening of the fish body (Fulton's coefficient = 1,6 compared to 1,9 for healthy fish) and a slight anemia...

In the present study are presented the causes and consequences of a bacterial disease signaled to the silver carp farmed in polyculture with Cyprinids and other fish species in ponds. In the spring of 2017, the presence of a bacterial disease of the species Hypophthalmichthys molitrix cultured within the Fish Culture Research and Development Station Nucet, Romania, was first reported. The illness caused the weakening of the fish body (Fulton's coefficient = 1,6 compared to 1,9 for healthy fish) and a slight anemia...

Under intense stress, energy consumption undergoes essential changes that largely depend on functional characteristics of the respiratory system, which in turn are in close correlation with the body?s training degree and physical demand. During a pronounced dynamic effort, there is a progressive decrease in blood oxygen saturation and an increase of pulse. Cardiac rhythm is a physiological parameter commonly used in telemonitoring as it allows the assessment of rescuer?s general condition, heart rhythm disorders b...

In the combustion processes the nature and concentration of the developed gaseous effluents depends on the type of materials that are subject to combustion as well as on the conditions in which the oxidation processes take place. The purpose of this paper is the experimental determination of the combustion parameters and the study of the developed gaseous effluents from several combustible materials. The production of gaseous products resulting from combustion results in different yields depending on several param...

This paper presents the research undertaken in order to establish a processing technology for the Budureasa dolomitic limestone. For this, a series of physico-chemical and mineralogical analyzes were performed, but also unitary processing operations such as grinding, calcination, gravitational concentration and flotation, and solubilization with carbon dioxide in an aqueous medium to obtain a MgO ? rich concentrate, usable in various fields of activity, under economic efficiency conditions. Mineralogical, chemical...

The harvesting of the material has been done by means of entomological mesh and Barber soil traps from some wheat crops in the Dele?ti - Vaslui area. In the Barber traps, consisting of plastic containers height of about 10-12 cm and 8-10 cm in diameter were placed a solution of about 4% strength formalin. Six traps were used for each experimental variant, with a total of 18 traps. For entomological mesh collection, periodically, with the harvesting of the material picked up to the soil traps were made 100 threads ...