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In the context of the aggravation of global contradictions in the interaction of man and nature, environmental consciousness must respond quickly and adequately to the situation, outstrip threatening events and seek ways to overcome environmental disruptions and harmonize relations in the supersystem «nature». These challenges encourage the natural and human sciences to create for man a new knowledge, which would be based on the laws of human development, as part of nature, and the principles of value-semantic pro...

Due to depletion of high-grade ores, high cost of mining and environmental issues, many mines have reverted to retreatment of slags. The recovery of Nickel from reverberatory furnace slag using sulfurization and flotation was studied. Critical parameters such as sulfurization temperature, sulfurization agent (Gypsum containing 86.87% CaSO4) dosage and time were investigated for the sulfurization process and effect of collector type and dosage, pH, particle size and flotation time for the flotation process. It was ...

Pollution of the environment as a result of human activity has become one of the most important problems of our time. Undoubtedly, in the twenty-first century, the development of civilization will be under increasing pressure from the environmental aspect. The use of waste becomes a permanent function of social production, expands the raw material base, preserves non-renewable sources of primary raw materials, prevents environmental pollution, provides a significant economic effect by saving current costs and inve...

Production of castings plays an important part in the global and in the national economy. The main recipient of the foundry production is the automotive industry, but castings find application also in other branches of industry, in civil engineering, in farming, in medicine, and can as well serve art production. In 2016, worldwide casting production reached 104.1 million metric tons, a shade over the 103.7 million metric tons produced in 2015. The remaining 2015 top 10 casting nations by tonnage are Japan at 5.4 m...

This paper addresses the problem of atmospheric pollution due to the scrapping of motor vehicles. Most of the materials used in the automotive industry are non-renewable, so the decommissioning of cars is a global problem. The environmental impact of this type of pollution is irreversible. In Romania, this problem is amplified by the purchase of second-hand cars that have a low life expectancy and are much earlier in the situation of being scrapped. Recovery of scrapped materials must be done selectively because a...

Natural zeolites are able to remove lower concentrations of contaminants present in groundwater and drinking water through ion-exchange process. The main objectives of this work were: (1) to determine the efficiency of different types of regenerants: NaOH 0.5 M, NaCl 0.5 M, NaClO 0.5 M and NaClO:NaCl (1:1) 0.5 M; (2) to investigate the effect of initial pH (5.7 - 11.7) and molarity (0.5 - 1 M) of the regenerants; and (3) to determine the removal capacity of natural zeolite for ammonium removal after ten (10) sorpt...

From fast-growing plants, Miscanthus is a promising alternative energy source exploitable at regional level. The climatic conditions in the region also have a significant impact on the biomass production and also on the economic efficiency. The aim of the paper was to evaluate the influence of selected climatic parameters on the total production of the above-ground biomass of two Miscanthus genotypes in the Nitra region in the Slovak republic for the years 2015-2018. The method of monitoring climatic parameters an...

The regular mode of the 3rd kind (method of periodic heating) is one of the effective ways to measure a complex of thermal characteristics (thermal conductivity, thermal diffusivity and heat capacity) of gases and liquids (see, for example, the works of L.P. Filippov and S.N. Kravchun). Currently, this method has become widely used to study the thermal properties of solids. In our works, schemes of the process of heat transfer in the system of three contacting bodies ? the sample under study and two semi-limited (...

The European Union ?circular economy? aims to maintain the value of products, materials and resources for as long as possible, minimizing the generation of waste by recycling and reusing them [1]. The leather industry generates large amounts of waste, more than 55% of raw material (hides and skin), and over 99% are stored at the landfill [2, 3]. Part of these waste generated are untreated solid waste (hide and skin), meaning around 500-600 kg per ton of raw hides [4, 5]. A way to valorize the untreated hide and sk...

This article is devoted to the questions of the reliability and the accuracy of the invented algorithm. Background: The implementation of autonomous navigation system for unmanned airborne vehicle is required for the reliable navigation in case of the instability of the satellite navigation system. Traditionally this problem is solved by the terrain landform navigation system, also the synthetic aperture radar navigation systems could be used as the correction system for the inertial navigation system. Nevertheles...

The effective precision crop products' production is impossible without modern contact and remote optical control methods of a physiological and phytosanitary condition of crops. At Agrophysical research institute (Russia, St. Petersburg) the technique of definition of homogeneous technological areas is developted by using the means of unmanned aerial vehicles of helicopter (Geoskan-401) and plane (own development) types. Also the test plots which are used as the standards with the known parameters of a physiologi...

Historical province in south-eastern Romania, Dobrogea has been inhabited since ancient times as attested to identify objects belonging to Neolithic cultures Gumelnita and Hamangia. On the western coastline of the Black Sea have placed the Greek colonists from sec. VII i. Chr. In ancient times, Dobrogea was named Scythia Minor. The population has been long and constant, traditional occupation being agriculture, in the present share of arable land exceeding 2/3 of the total. The total area of the Dobrogea Plateau i...

The tremendously increased energy needs due to advancement in technology have put pressure on electric grids. The conventional grids cannot bear that extra load. Although the availability of renewable resources (solar, wind, hydro and biomass) at a large scale have great potential to offer environment friendly energy solutions, however, the compatibility of Distributed Renewable Energy Sources (DRES) with existing conventional grids in developing countries is a serious concern. Therefore, the issue of growing elec...

Emergency management is a complex task, involving precise coordination of numerous activities and people, as well as fast decision-making in environments where critical, vital information, might often be missing. Despite all technical and technological progress, most industries record accidents with human casualties and property damage. For this reason, the presence of special intervention ? rescue teams at economic units is critical, because they can ensure a quick and efficient response to confine / eliminate da...

This paper tackles a research concerning the restoration for agricultural purposes of different soils affected by landslide phenomena. Landslide is an erosion process which adversely affects the relief, and the damage caused to life and to the environment as a whole are considerable. Nevertheless, soils are the most seriously affected by landslide, as they lose a vital characteristic: their fertility. Research has been conducted on several experimental fields, set up on different types of non-evolved soil, in orde...

The goal of integrated multidisciplinary research was to develop a model for estimating and forecasting the dynamics of phytoplankton depending on meteorological and hydrophysical parameters. The analysis of water samples from various horizons obtained in the Gorky reservoir from 2015 to 2018 was performed as an important part of the research. Samples were examined for the presence of algae using a Levenhuk microscope equipped with a digital camera and connected to a computer. The results of the identification of ...

In the Russian Federation, according to the United Nations, the area covered by forest is 8.5 million km?. Due to the available sufficient reserves of forest resources, the enterprises of the timber industry complex have developed significantly. In the conditions of a modern competitive economy, for the purpose of their further development, timber industry enterprises are forced to maintain investment activity at a high level, to optimize technological processes and modernize production equipment. The article pres...

The tensile properties of conveyor belts significantly affect their use in practice. Research is focused on the determination of the influence of sampling direction on the tensile strength and the elongation of 3 types of fabric conveyor belts. The carcass material determines the tensile properties of the conveyor belt. The carcass of a fabric conveyor belt is formed by several layers of textile plies. The textile plies are created by crossing the system of warp and weft fibres. The warp represents a set of fibres...

Intervention and rescue activity in special conditions can be conducted under special requirements only by trained and authorized personnel using personal protective breathing equipment. The decisive factor for the success of an intervention and rescue operation in toxic or chemically aggressive environments lies, among others, in optimum and efficient design of rescue personnel?s training process, in connection with their testing in environments with high temperature and humidity. Heat is normally generated as a ...

This paper presents the stages of embryonic and postembryonic development in Polyodon spathula (Polyodontidae) under the conditions of the acclimatization area at Fish Culture Research and Development Station Nucet, Dambovita county, Romania. Embryonic development at the paddlefish is carried out in the temperature range of 14-18o C with an optimum of 16o C. For the induction of maturation and ovulation, the Nerestin 5A hormone was used. The size of the eggs is between 2.7-3 mm and light gray to gray-black in colo...

Research was carried out between 2016 and 2018 on eutricambosol-type soil with pH-5.65, low humus content of 1.37% and a rate of base saturation of 69.68%. Soil texture is medium-fine. In climate terms, according to Koppen, the climate falls under the formula c.f.b.x, characterized by a temperate climate with rainfall all year round, but with a deficit of water in the summer months. The average temperature of the year is 10.80C. The average annual precipitation volume is 631 mm. To correct the acidic reaction of t...

More than 400 geodetic and cartographic documentation centres are active in Poland; they are maintained by starosts (heads of districts) and presidents of cities with rights of districts at the level of heads of districts, or cities with rights of districts. In particular cases those centres are maintained at the municipal level, if a relevant agreement has been concluded with a mayor or a president of a city which is not a district. At present the method of producing maps for design purposes is regulated by two l...

The rapid developments of science and technology, as well as the restructuring of the extractive mining industry, have led to massive changes in the structure and complexity of mining equipment. Mining units must provide an advanced level of mechanization and automation, thus ensuring increased productivity and safety. The use of modern information technologies for surveillance and monitoring of high complexity technological facilities is a topical issue. By monitoring the main functional parameters of excavation,...

Vulnerability to stress occurs during the person's biography, depending on psycho-emotional trauma, experiences of severe psychological stressful situations, including how the individual succeeded in managing them. Some people have a constitutional or psychological vulnerability to the action of traditional stressors, being more prone to psychic stress. The multifactorial complex of non-specific factors that modulate the individual response necessarily includes personality traits, acquired during the individual's ...

In this work, the high-bog peat was used for the production of monosaccharide as a biofuel source. As it is known, peat is one of the renewable energy sources which is widespread in the Central Region of the Russian Federation. Paet contains over 40% of such polysaccharides like cellulose and hemicelluloses. The study of the peat pretreatment methods for further hydrolysis is the main task for chemical and biotechnology. In the current work, the effectiveness of the ultrasonic pretreatment of the high-bog peat for...

The paper approaches a series of researches that concern the finding of a solution for modernizing the cutting wheels of the extraction tower of Slanic Prahova salt mine. With this in view and starting from the observation that the former solution is worn out, a new variant has been conceived and designed in order that it might be applied to the structure of the extraction tower without important changes. Specialized software has been used for the assisted analysis and designing, which is able to provide the corre...

The geotechnical characteristics of rocks influence their behavior in terms of their strength and stability. Changing the geotechnical characteristics of the rocks is the direct cause of the loss of the natural balance of the slope when the resistance forces defeated by the sliding forces. Influence factors, which may be of geological, hydrogeological, hydrometeorological, climatic, seismic, biotic, anthropic, mechanical or geomechanical nature and occur in time and space on rock massifs/deposits, determines the c...

The article presents researches on the use of drones in agriculture. Going away from military and espionage applications, like many other inventions of mankind, drones have finally come to peaceful applications. The inclusion of top technologies in the construction and endowment of drones has made these devices very useful in many applications, such as: industry, agriculture, health, civil engineering, environmental protection, local administrations, security and guarding, transport, etc. In the literature, variou...

Restructuring of the exploitation of the coal deposit in the carboniferous area of the Jiu Valley in Romania is part of a quarter-century closure program and the use of minerals has been reduced by 10 times compare with the production achieved at the level 1989. In the last 10 years, the use of the coal in the steel production was abandoned, the production being processed only for electric and thermal energy needs. At present, 4 production units (Lonea, Livezeni, Vulcan and Lupeni) are operating in this area, out ...

Article is describing results of an experimental program focused on development of concrete, resistant to impacts of low pH environment. To a very low pH (2-4) is concrete often exposed when used in agricultural production (for example for silage or hay silage pits). Therefore, its degradation with such a low pH is very fast. The experimental part of the work focused on modification of concrete with sealing admixture on the basis of styrene-acrylate. We prepared set of 3 concrete mixtures with different dosing of ...

Today, much attention is paid to the research and development of application-specific instruction set processors (ASIPs). The architecture of such processors is focused on their application and the command systems differ from each other, therefore each architecture requires its own set of developer tools like a compiler, debugger, linker, etc. The program code optimization for each ASIP also has its own specifics. At the same time, compiler development should be as fast and technologically advanced as possible in ...

A vital role in detecting eye disorders is played by the analysis of the human retina using medical imaging methods. The main objective of this study is to improve the detection of retinal blood vessels by ameliorating the overall quality of non-uniform illumination conditions, removing image artifacts, connecting the broken vessels, and generating accurate segmented retinal vascular systems. A three-stage edge detection framework is proposed. First, image denoising, contrast enhancement, stretched decorrelation a...

The need of increasing the use of alternative materials, in construction and in production, is a current issue worldwide. At the same time, with regard to the treatment of waste, the management of bottom ash coming from Municipal Solid Waste Incineration, is an important issue all over the world, especially in Italy. In fact, the need for right management of ashes increases, which, in Italy, are almost always disposed of in landfills. This paper presents the environmental aspects of an industrial experiment, in Ce...

The expansive soils, known for significantly volume changes when subjected to moisture, pose major problems to foundations, causing severe damages to structures built on this kind of soils. Recent environmental approaches are focused on the conservation of natural resources and on reducing the effects of waste landfills by recycling and reusing different types of waste materials. In this perspective, a sustainable way to deal with expansive clay soils is to integrate them back into secondary building materials or ...

In this article, I will focus on the possibilities of recycling aluminium chips and chips from aluminium alloys. Recycling can be divided into conventional recycling, by remelting the material, or the unconventional method of recycling it in its solid state, in which the chips can be transformed directly into dense bulk materials. The advantages of this method lie in lower energy consumption, reduced metal losses, almost no emissions of harmful gases and minimum waste. In the introduction I will introduce the meth...

Revitalisation includes comprehensive and integrated activities in the social, technical, economic, environmental and spatial sphere. All revitalisation activities, however, must be subordinated to social goals, and infrastructural projects should support the improvement of the quality of life of residents and the socio-economic recovery of problem areas. Changes in rural areas aimed at improving spatial order and landscape aesthetics while preserving resources and forms of cultural heritage and local identity and...

Riparian ecosystems play significant role both in the natural and man related activities. They are important part of the hydrological cycle and ecosystem services. They actively support many processes connected to the environment wellbeing, floods retention and mitigation, erosion reducing, river restoration. But under the climate and climate change specifics and anthropogenic works they are under continuous pressure, surely affecting their natural development. To safe and mitigate presented impacts various measur...

For the district governance level, taking into account the medium- and long-term changes in the model of strategic spatial planning of marine activities (marine spatial planning) natural and environmental sustainability factors are one of the most important components, which is necessary to consider. Their importance is due to the fact that the geographical environment, being complex and comprehensive formation, has a strong impact on the development and preservation of ecosystems. At the same time, for the consid...

Ensuring the continuous production of housing and communal services, forms quality indicators of the human environment. The strategic orientation of the municipal management system allows enterprises to adapt to changing market conditions. In order to ensure the successful functioning and development of the industry, the classification and assessment of the probability of occurrence of negative events is carried out., which are a manifestation of latent or real threat to the safety of the human environment. With t...

Nowadays, sustainable forest management is affected by both the internal management conditions of forest enterprises as well as the external restrictions. While the internal conditions are determined by the economic efficiency of forest enterprises, the external restrictions, except for the nature conditions, result from the governmental regulative and supportive measures, forest policy concepts, characteristics of business environment, and principles accepted by the whole society ? this approach may both either h...

The Upper-Pontian aquifer is one of the most important in Northwest Bulgaria. It is built of sands with a thickness of up to 100 m that outcrop on the surface at the periphery of the Lom depression. The aquiferous sands are overlain by a lignite coal layer up to several meters thick. In order to assess the influence of coal on the chemical composition of groundwater, an experiment has been carried out in laboratory. In view of the leading role of rainwater, the experiments were conducted with real rainwater. This ...

In this paper a new type of Ru-containing catalysts based hypercrosslinked polystyrene (HPS) is proposed for cellulose hydrolytic hydrogenation to increase the selectivity to sorbitol. Also, we report the development of Ru-containing magnetically recoverable catalysts for cellulose hydrogenolysis to low alcohols, EG and PG. The use of the 1.0% Ru/HPS MN-270 catalyst allows achieving the total sorbitol and mannitol yield about 50% (245 °C, 60 bar H2, 30 mL water, 600 rpm, 0.028 mmol Ru on 1 g cellulose, process dur...

At the head of all the activities of society are human resources, they are making technological breakthroughs and the development of economic growth. In the overwhelming majority of cases, the development of new technologies is carried out at the expense of organizations working to improve the economy and technological development; organizations face the difficult task of stimulating human resources for a technological breakthrough. In this article, corporate social responsibility is considered as one of the tools...

Mining-and-industrial heritage ? underground workings, open areas of former mining works, natural caves and underground cavities are, in many cases in critical condition and pose a safety threat to the tourists visiting those. On the other hand, such places, have significant historical, technological and landscape value. Moreover, these objects are also crucial for the development of tourism, attracting a lot of visitors by their uncommonness. Underground space for tourism purposes is often used by the specialists...

Traffic volumes in road traffic show growth, especially in developed countries. Where necessary and depending on space, financial possibilities and other aspects, increasingly more capacity roads (multi-lane highways, complex grade-separated interchange, etc.) are being built. The places, where the roads meet (i.e. at the intersections), are the most problematic (traffic accidents, capacity problems, etc.). Standard intersections (i.e. level intersections, roundabouts, intersections with traffic lights or grade-se...

The security of technical infrastructure in crisis situations can be divided into several areas that can affect its functions. The aim of this work was to focus on water infrastructure with regard to legal aspects set in the Czech Republic. Water is essential for economic growth, human health, and the environment. The main reason for the emergence of the crisis situation in parts of the water infrastructure is predominantly presence of a large amount of water (torrential rain, lightning flood, flood, increased wat...

Safety planning is an important part of the mechanism that helps overcome extraordinary events or crisis situations. A safety plan is a general planning document such as a crisis plan, emergency plan, flood plan, etc. that focuses on the safety of an area. The structures of individual safety plans are defined in various legal and methodological regulations in the Czech Republic. The content may include safety plans aimed at either preventing or responding to emergencies. Some safety plans have combined content and...

The present paper aims to assess the microbiological water quality of the wetland La Tembladera?, Ecuador. The object of study is located in the southwestern Ecuador, canton Santa Rosa, in the province El Oro. Microbiological analyses included the determination of the sanitary-indicative microorganisms? number, such as total bacterial count, bacteria Escherichia coli, ?lostridium, actinomycetes and micromycetes. Water samples were collected two times per week during dry tropical season at three points with differe...

According to national forest statistics data of 2018, Picea abies occupies 18% of the forest area of Latvia. As a result of intensive forestry management a forest productivity and the diverse anthropogenic influences on forest ecosystems are significantly increased. During the life a growth of spruce young stands can be influenced not only by abiotic but also by various biotic and anthropogenic factors. An aim of the research was to analyze sanitary condition of the artificially regenerated young forest stands of ...

Climate change is defined as a significant difference between two mean climatic states, with substantial impact on the ecosystem. Extreme climatic events, such as higher temperatures, more intense precipitation, increased drought risk and duration as well as cyclones and flooding in coastal areas, are expected to increase in both frequency and intensity. One of the possible indicators of water stress is sap flow measurement. For this experiment were used the apple trees in Nove Zamky, Slovakia. On stem were instal...