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Rice production is highly important for economy of Brazil. The residual husk of rice production is usually burned and causes a worthless ash for agriculture. Rice husk ash has high silica content. As silica is one of the most used pozzolanas in construction industry, rice husk ash is expected to develop pozzolanic activity in concrete. Considering the specific case of Montes Claros region in Brazil, an exploratory study with the goal to check the effect in the concrete properties when cement is partially replaced ...

Taking into account the Regulation (EU) No 98/2013 of the European Parliament and of the Council of 15 January 2013 on the marketing and use of explosives precursors, which establishes harmonized rules concerning the making available, introduction, possession and use of substances or mixtures that could be misused for the illicit manufacture of explosives, with a view to limiting their availability to the general public, and ensuring the appropriate reporting of suspicious transactions throughout the supply chain,...

Lean manufacturing is an innovative approach to business process management that allows organizations to increase their competitiveness by producing goods or providing services in the shortest possible time and at the lowest cost with the quality required by the consumer. In the paper, the authors provide an analysis of foreign and Russian requirements in the field of lean manufacturing. The authors studied the experience of implementing the lean production methodology in a dairy production company, identified fac...

Sheep farming is one of the agricultural industries that makes a significant contribution to the economies of many countries around the world. The scientific literature gives various perspectives on the importance of sheep farming, as this industry plays a very important role in providing income, nutrition and paid employment for rural households, and it also supplies a diverse range of products and contributes to employment in rural areas. Sheep farming is an environmentally friendly industry because it consumes ...

Estimation of the Remaining Oil Saturation (ROS, the fraction of pore volume occupied by oil at a given location and time) in a reservoir is one of the key processes in oil field monitoring and exploitation. Because of the various geological, structural, and chemical heterogeneities that exist within the formations composing an oil field, the evolution of ROS as the reservoir gets drained will be heterogeneous as well. Such discrepancies can occur at different scales, from the microscopic (pore size) to the macros...

Along with creating modern infrastructure facilities in Moscow, 9-storey building with a multi-level underground unit is being constructed in the central part of the city. Partial preservation of the structures of existing historical facades of buildings is provided during construction. Buildings, structures of the surrounding development and dense network of underground utilities fall into the zone of construction influence. Taking into account the construction in conditions of dense urban development, near exist...

The main features of the measurement of the trace amount of 90Sr using ICP-MS inecology and nuclear forensics were established. Among them are sample-specific matrixeffects which may enhance or suppress the analyte signal, spectroscopic interferences,poly-ions formation, isobaric interferences, and reagent contaminations. Proposedsolutions to these problems: external and internal calibration of mass-spectrometer, precleaning and pre-treatment of the adsorbents and reagents, as well as selective removingisobar inte...

Romanian seismicity, is characterized by a moderate rate of tectonic origin earthquakes, with an increase in density and higher magnitudes, within the Vrancea region, located at the South-Eastern Carpathians bend, at the conjunction of three major tectonic units: East European Plate, Intra-Alpine Plate and Moesian Plate. First-motion focal mechanism solutions are a good proxy for the initial rupture and they provide important additional information on the source mechanism. The data compiled in the present paper pr...

The paper deals with the causes of numerous local floods and flash floods in forest areas and neighbouring location. Forest wood mining forest roads and approach paths are proven to be the main cause of forest drainage and loss of its accumulation function. Forest roads intended for logging cause drainage of large areas, easy runoff of rainwater as well as subsequent drying of the soil, weakening of trees and devastation of the forest. Two successful projects for the recultivating of forest roads have been present...

The devastating impact of floods in the past years triggered the awareness and interest regarding the need of effective flood risk management and improved strategies. The spatial distribution of the elements at risk, which are represented by land use inventories, is an important factor that influence the cost associated with floods, the rapid urbanization leading to an increased flood exposure and vulnerability. The land use planning can be a useful tool for flood damage mitigation and must be taken into account i...

Dumping during open-pit mining is one of the important processes on which the area of disturbed lands and the environmental friendliness of the technology as a whole depend. In permafrost conditions, the issue of dumping requires a comprehensive study of the technology, dumping processes and taking into account the strength, thermophysical properties of frozen rocks. In most cases, when developing small coal deposits in the North-East of Russia, favorable mining and geological conditions of bedding are used for in...

The existence and development of geography as a science, as well as the geography training are inconceivable without a geographical map. Geographic maps serve as models of the studied territories, processes and phenomena, which makes them an indispensable tool for exploring and studying the surrounding world. The development of cartography today reaches such a level that geographical maps can depict not only the spatial relationships between objects and phenomena located on the earth's surface, but also their most...

The article presents a new view on minimizing and overcoming the consequences of the violation of coevolutionary "equilibrium" in the system "nature-society". The analysis shows that there are no differences in the system of eco-values, neither in the European integration nor in a certain state context. The modern movement of environmental consciousness reveals certain contradictions between the perception of environmental ethics and real actions and environmental practices. It is proved that the time factor (dela...

The NW part of the Black Sea is under the strong influence of the Danube River that discharges into the basin. Danube, through the input of sediment and water, has a double function in controlling the gas presence in NW Black Sea shallow sediments. The first function is to deliver into the sea the terrestrial organic matter that it is added to the marine in origin one. The second function is to provide a sustained sedimentation rate, needed to bury older organic matter, conducting to biogenic generation of methane...

In accordance with the principles of sustainable development, people have the right to live in a healthy, comfortable, and pleasant environment that is adapted to their needs. Not only urban planners, urban engineers, or developers, but the whole society are starting to deal with the issue of public space in cities more intensively. However, most of the discussions mainly concern the height and density of buildings within the city and do less about the resulting changes in urban space, which will affect the entire...

The article describes the results of geochemical studies of formation water in the Romashkinskoe oil field of the Republic of Tatarstan. Geochemical monitoring is a good indicator of the origin of natural waters, the method can be used to mark formation waters. The study of an extensive collection of produced water made it possible to trace the change in its geochemical composition depending on the age of formation of the reservoir in the Volga-Ural region. Geochemical studies were carried out in the produced form...

Tasks involved in controlling and managing ambient air quality on urbanized territories require actual and authentic data on emission sources and their structure, as well as on how pollution is spatially distributed under various meteorological conditions, capacity of industrial objects taken into account. It is difficult to regulate dust pollution of ambient air due to its certain peculiarities. Dust components in emissions from various productions tend to have poly-disperse and multi-component structure. This st...

The article considers the estimation and prevention problem of ecologically dangerous influence of technogenic noises generated by moving transport, such as heavy tracked and wheeled transport, railway transport. The influence on the people and the environment of a low-frequency controlled CV-40 seismic vibrator [1] used for seismological research is considered separately. The influence of vibrations located in the area of low and infra-low frequencies is estimated. The results of field records of technogenic nois...

The Moldavian Platform represents the south-west margin of the East European Platform. To the south, the Moldavian Platform is bordered by the Scythian Platform and to the west by the Carpathians. The Moldavian Platform encloses many geological and paleontological sites of high scientific value, being well known for the Middle Miocene wide exposures, represented by the Paratethys stage Sarmatian. In this study, we present the geological and paleontological heritage of 6 natural reserves from the Moldavian Platform...

Geomagnetic disturbances and their associated phenomena can be an important parameter as data input in climatology studies and climate change. This paper is a preamble to a deliverable "Development of a catalog on the typology of geomagnetic variations based on records from the Surlari Geomagnetic Observatory" within the Space Weather project which is part of the complex multidisciplinary project „Institutional capacities and services for research, monitoring and forecasting of risks in extra-atmospheric space” wh...

One of the most important components of monitoring any object is to determine the degree of its pollution. Current and accurate information on the quality of water bodies and soils is the basis for regulating the activities of water users and land users, ensuring measures for the rational use of natural resources, informing the relevant authorities and the population about possible dangerous situations. Surface waters, like agricultural households, are strategic renewable natural resources of Ukraine. A characteri...

UNESCO’s Global Geopark Network reflects the importance of geo-heritage for society. The wide range of characteristics and the varied connections to the local ecology and culture are significant for their individual management. The aim of this article is to use comparisons between Geoparks as a step toward a generic, conceptual model that can be adapted and used to understand the crucial, functional relationships between system variables and how these variables can be optimized for stainable management. A general ...

The seismic surveys, carried out in various stages, highlighted two domes, placed on the eastern flank of the outpost of the Eastern Carpathians, in the Pralea - Focsani Depression. According to the Bouguer and filtered gravimetric images, the two domes (Fitionesti - Trotusanu and Movilita) are placed approximately 12 km east of the axis of the outpost, on a single major gravimetric maximum. But, while the south-eastern dome (Movilita) determines an important local gravimetric maximum (+6 mgal. On the residual gra...

Acid tar lagoons (ATLs) are a common source of groundwater pollution in industrialized countries worldwide. Even after recultivation, the spatial extent of the residual environmental pollution from such lagoons is often unknown, as the monitoring of groundwater is mostly done in discrete locations ? monitoring wells. Shallow surface geophysical methods, such as ground penetrating radar (GPR) and electrical resistivity tomography (ERT) are often used in monitoring groundwater and soil contamination. The greatest va...

The study area is located in northern Bulgaria in the northwestern part of the town of Kozloduy, Vratsa province. From an engineering geological point of view, the region falls within the Lom Engineering Geological Area, which is characterized by the presence of loess sediments (silty clay sands and sandy clays), which are with high porosity, non compacted and susceptible to collaps?. Other dangerous engineering geological processes are landslides and river erosion. The Kozloduy lowland is one of the Danube lowlan...

We have proposed an approach to establish spatial patterns on the application of graphs theory. Traditionally, the theory of graphs is used in spatial studies to quantify the geographical position and its various aspects. Graph theory is a section of qualitative geometry, the differences of which are that it operates with dimensionless quantities, does not use the concepts of angle, and line length. It operates with spatial elements - points, lines, surfaces, volumes, and relations (connections) between them. Diff...

The modern world is on the verge of change - the models of economic development that have existed for more than one decade are being replaced by new systems that will provide humanity with not only a bright present, but also the future. We are talking about a green economy, with equal attention not only to people, but also to the world around them. The green economy and its competitiveness is a global and European opportunity to overcome international economic problems, accompanied by a more lenient attitude towar...

Ground level ozone (O3) is a photochemical pollutant with harmful effects on human health, vegetation and ecosystems. The focus of this work are ozone data measured at the synoptic station Ahtopol, a rural site at the southern Bulgarian Black Sea coast. The surrounding area is without big anthropogenic sources of air pollution, rich in biodiversity and protected zones by NATURA2000. From our summer campaigns data collected during the last years, we have selected for analysis July 2018 – a summer month with well-ex...

Health risk should be considered a key component in the environmental safety,especially in urbanized territories with developed industries.The research aim was to assess health risks in a city with developed metallurgic andpulp and paper industries in order to substantiate future activities aimed at protectinghuman health and the environment.Bratsk was chosen as a research object since it is a large industrials center located in theEastern Siberia in the Russian Federation; the city population is more than 200 tho...

Oilseed processing technologies include a sequence of intensive multiple heat treatments of seeds, oil and intermediate products. The optimization of these processes largely determines not only the price, but also the quality of the final products. Heat and mass transfer in multiphase multicomponent media are very complex. It is not yet possible to build adequate models of all processes theoretically. The thermophysical properties of the media under study change significantly with heating and changing pressure. Ne...

Air pollution is a problem today, and it is essential to know how high it is. By increasingpeople's standard of living, increasing the number of factories, cars and citizens, it ishelpful to know how much pollution is distributed and whether it does not exceed thestandards allowed for pollution. It is necessary to investigate air pollution with heavymetals in Jelgava by identifying data from areas. In preparing the analysis, it is possibleto assess whether air quality is adequate and does not exceed pollution stan...

The lack of direct measurements (the most accurate way to determine characteristic high flows) has posed the need to look for other hydrological methods that are sufficiently reliable. The regionalization is an indirect hydrological approach for specific high flow determination used at ungauged river stretches. Usually the hydro-technical constructions or other important economic activities connected to the water use are the main reason necessitating the study of characteristic high water on rivers. For the purpos...

The article deals with the problems of designing multi-channel high-frequency signal generators for the transceivers of unmanned aerial vehicles (UAVs). It is proposed to use high-speed digital-to-analog converters to increase the output frequency and improve the noise characteristics of UAV transceivers. The possibility of using special operating modes used in modern high-speed direct-to-analog converters (DACs) for digital generation of broadband signals is shown. Mathematical models of noise characteristics at ...

Dissemination of the hoaxes and misinformation can exacerbate the consequences ofindustrial accidents with disastrous consequences for the environment. There arewarning examples from the past that the intentional misinformation may cause fatalconsequences. Three major industrial incidents introduced proofs the importance of thecorrect and true information. It demonstrates the sensitivity of any event on thecorrectness of information sources especially at the beginning of the accident in thecritical time for the pe...

Flood events, as well as the channel and floodplain landforms are crucial for the transport and spatial distribution of heavy metals and metalloids in soils in the river valleys. The paper outlines the results of obtained preliminary indications about the flood proneness of two study areas located in the valleys of Ogosta River near the village of Gorna Kovachitsa and Lom River near the village of Vasilovtsi (NW Bulgaria) based on hydro-geomorphological indices. The detection of flood-prone areas has been done usi...

Catalytic activity of commercial ruthenium catalyst (ruthenium (5%) supported on alumina (Ru5%Al2O3)) on renewable hydrocarbon production from stearic and oleic acid via hydrotreatment was investigated. Moreover, the effect of Ru5%/Al2O3 on aromatic (ethylbenzene) and saturated cyclic hydrocarbon (cyclohexane) structure modification under the same reaction conditions was determined. Full conversion of fatty acid feedstock into pure hydrocarbons were achieved over ruthenium catalyst. Linear alkanes (n-pentane to n-...

Droughts are a natural phenomenon with a fairly high frequency worldwide. Their evolution generates, through the water deficit, a state of vulnerability at the level of natural and social components. In areas dependent on groundwater resources this vulnerability is transformed in a high social and economic risk. In this situation can be included the eastern part of Romania where over 50% of the population, predominantly in rural areas, is supplied with groundwater. In order to highlight the negative effects of a n...

The researches were carried out in a catchment with a pronounced torrential character and flood risk (Slanic catchment) located in the Siret catchment, Romania. Precipitation data were available from the monitoring network of the Siret Water Basin Administration, from 2019 and 2020; given their continuity they were considered suitable to allow hydrological modeling. A hydrological modeling was followed, that simulates the rain-drainage processes of the water systems, given that in the studied catchment there are a...

The increasing world population demand for bioeconomy products intensify the nitrogen cycle and encourage eutrophication in water bodies. Global climate change and land use transformation have a significant impact on the hydrological cycle. Integrated water management in the catchment area is a sustainable solution for catchment area development and balancing economic and environmental interests. The aim of this study is to develop an optimization model for sustainable lake management. The case study is done in eu...

The article is dedicated to the study of hydrometeorological parameters on a stationary oceanographic platform in the Black Sea. The research paper contains the description developed in the Marine Hydrophysical Institute’s complex for measuring meteorological parameters (wave height, wind speed and direction, free-air and sea temperature, barometric pressure, relative humidity). The measurements were carried out on a stationary oceanographic platform located in the coastal zone of the southern coast of Crimea at a...

In the investigation of gas explosion events resulting from combustible gas leakage, often the formation of the explosive atmosphere at the location of the ignition source is less highlighted, usually being calculated the concentration of combustible gases at the entire volume affected by the explosion; depending on the distance between the gas source and the ignition, the complexity of the geometry (volumes occupied by various solid bodies) and the air currents in that volume (convective currents generated by hea...

The immobilization of glucose oxidase (GOx, enzyme of oxidoreductases class) was carried out on non-magnetic (SiO2, Al2O3) and magnetic mesoporous oxides (Fe3O4-SiO2, Fe3O4-Al2O3). Magnetic supports were synthesized by in-situ crystallization of magnetite nanoparticles in mesopores. The surface of the support was preliminarily modified with amino groups and the glutaraldehyde was used as a linker for covalent binding of the enzyme. The supports and biocatalysts were fully characterized using a combination of physi...

At present, surface runoff represents serious environmental problems in the urban environment, causing adverse effects on socio-economic and natural systems. Surface runoff is a complex source. The creation of surface runoff is described by various hydraulic hydrological processes, from the impact of water on the surface to the mouth into the sewer network or recipient. The formation of the precipitation-runoff process depends on several factors. Land-use change is a key factor that significantly affects the quali...

In this study SURFEX land surface model is used coupled to RAPID river routing model in order to investigate the influence of alternative ground and rooting depth, soil texture and land cover maps on the ability of the coupled system to adequately simulate the river flow in Upper Arda River basin in Bulgaria. This was done by comparing the statistical scores of computed from the model data series against measured streamflow discharge series: that is scores of simulations using former soil texture maps from Harmoni...

Due to land use practices, there is a change in the environmental landscape in Haridwardistrict which has a great impact on its weather which in further also impacts vegetation.Vegetation Indices are considered as indicator for temporal variation of vegetation sofor better consideration of this dynamics, relation between vegetation and climateshould be studied more extensively. This study evaluates the annual dynamics undervegetation cover and its impact on climatic factor. It is carried out by establishing therel...

The article analyzes the effect of the radioactivity of some crude oil components on the environment in the Moine?ti geological area. The analysis of the equivalent dose flow measurements shows the influence of contaminated equipment, in the areas adjacent to them, where when measuring the soil were obtained values of dose flow between 0.2 - 3.0 ?Sv/h, both at a height of 10 cm from of soil, as well as at a height of 100 cm from the ground, with a maximum of 3.5 ?Sv/h. By interpreting the results of the determinat...

The formation of a groundwater aquifer in a unique territory disturbed by the quarrying of a phosphorite deposit in the southwest of the Leningrad region, built up with industrial facilities for ore processing, auxiliary production, and waste storage is considered. During the quarrying of the phosphorite layer, the hydrogeological section was disturbed, the filtration and capacitive properties of the soils of the aeration zone and water-bearing rocks changed. In the zone of active quarries, during dewatering, the ...

The paper deals with numerical analysis of the stability of an embankment reinforced using a geogrid. The analysis is mainly focused on the impact of the Rinter parameter, which represents the ratio of the soil-geogrid interface shear strength to the shear strength of the soil, on the deformations, and the global stability of the embankment. The properties of the soil-geogrid interface were measured using a modified large size direct shear test apparatus. The biaxial geogrid made of polypropylene with a tensile st...

Regions with scarce freshwater resources, such as North Africa and the Middle East, face significant challenges today and will face even greater challenges in the future as a result of socioeconomic and climatic changes. The Missour Oases in Morocco is one of many arid Moroccan Ocases grappling with increasing water scarcity, which threatens self-sufficiency in agriculture. Efficient water management is required to sustain people's livelihoods. The main aim of this study is to assess the impact of human activities...