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A ventilation system is defined by performing air exchanges between the indoor and outdoor environment with the purpose of creating environmental conditions as close to the required thermal comfort conditions. Before installing a fan, it is necessary to analyze the space in which it is to be used and the method of compensating the exhaust air (mechanically with another fan or naturally with dimensioned grids). The most important factors to consider when choosing a fan are: the volume of the space, the number of sh...

More sensitive methods to determine chemicals in food enable us to assess the contaminant danger in the product. It is of help when evaluating the speed and conditions of their formation in the food and studying long-term carcinogenic and acute toxic effects on the body. The results of exposure to contaminants on the body as biomarkers of the effect in a controlled experiment on laboratory animals and the further use of the results obtained in the risk assessment might serve as conditions for establishing or revie...

Water crises have become more and more frequent in recent years. In fact, the ongoing climate changes have led very often to periods of drought, which, together with the increasing of groundwater exploitation, leads to a depletion of thess resources, which are fundamental for human life. Most of the most important springs, in the world, are located in karst areas. Specifically, for a large part of the Mediterranean region, karst springs play an essential role in water supply systems. The quantitative analysis of k...

The Guli and Bor-Uryakh massifs, a part of the Siberian Large igneous province (LIP) are mafic-ultramafic intrusive complexes, with strong alkaline affinity. They contain deposits of apatite and are also known to be source rocks of Os-Ir-Ru placers. These massifs are of great interest for petrologists worldwide, as they are composed of an unusual variety of rocks (dunites/olivinites, shonkinites, melilitites, alkali syenites and carbonatites) and being coeval with Siberian trap volcanic rocks, including diamondife...

With the economic development of the European seas and rivers, there was a sharp increase in demand for services and transport. Maritime transport is one of the least expensive methods of transport, unlike road, rail or air transport and has a number of advantages in terms of the size of the goods transported and the increased safety of freight transport. Many of the sea routes have among their destinations river ports, which hold a large part of the year traffic of ships. In the European waters we find a diversit...

Intensification of forest management is required due to contrasting trends of growing demand to use renewable materials and boost carbon sequestration, while simultaneously decreasing area of managed forest. Additionally, increasing frequency of natural disturbances creates difficulties to ensure production of high-quality saw-logs. One of the strategies to overcome (or at least minimize) the negative impacts is establishment of low-density plantations, intended for relatively short rotation (c.a. 50 years). Aim o...

The buried soils of kurgans that have been constructed during the arid (2200-1800 years BC) and humid periods (1300-1400 years AD) in the Volga upland and the Caspian lowlands were studied. The paleosols buried 2200-1800 years BC are characterized by significant salinity and the accumulation of easily soluble salts and gypsum in the middle part of the soil profile and the formation of characteristic salt peaks at the depth of 80-120 cm. The chemical properties of medieval paleosols buried (1300-1400 years AD) indi...

The purpose of this article is to present the algorithmization of the scenario planning process, based on cognitive methods of economic and mathematical modeling. The methods are based on the etiological diagnostics of synthesizing economic and non-economic indicators, exponential smoothing of the explanatory factors, and the results of the regression analysis. They will allow constructing multivariate scenarios (realistic, pessimistic, and optimistic) of the agrarian sector of Ukraine's economy. The assessment of...

The global climate emergency has among its main causes the emission of large quantities of CO2 due to human activities. There are many policies implemented so far worldwide, but as the Union Square climate clock in the heart of Manhattan highlights, a greater effort is needed. The work of Gan Golan and Andrew Boyd shows, with its countdown, how much time we have left to limit carbon emissions before we reach a point of no return. According to the World Green Building Council, 39% of total energy-related carbon emi...

The paper presents the results of research on the radiation balance of coniferous forest ecosystems in the mountain Crimea. Based on open reanalysis databases and the geoinformational modeling results, the elements values of the radiation balance of coniferous forest ecosystems located in different landscape zones and levels are calculated. It is found that for the period from 1983 to 2013 the values of the radiation balance of the mountain Crimea coniferous forest ecosystems vary from 1641.8 to 1836.4 MJ/m2?year....

The natural zeolites (NZs) are low-cost natural materials, available in large quantities in different parts of the world, with good mechanical and thermal properties, ion exchange capacity, ability to adjust pH, high surface area and adsorption capacity. Despite their wide range of applications, the use of NZs is limited in industrial processes (where synthetic zeolites are preferred) due to presence of impurities in their structure and the properties which could not be optimized by nature. These limitations can b...

When developing oil fields, water flooding is often used to displace oil. In this case, effective oil production is possible with a detailed study of hydrodynamics in the reservoir. Recently, organic phosphors have been used for these purposes, which are pumped into the formation through injection wells. The spectral characteristics of the excitation (absorption) and luminescence of produced water with phosphors can provide information on the hydrodynamic relationship between injection and producing wells and the ...

The Auto-Regressive Integrated Moving Average (ARIMA) model is widely used to forecast non-stationary time series data. In a model of ARIMA (p, d, q), AR is autoregressive, p is the number of regression terms, MA is the moving average, q is the number of moving average terms, and d is the difference time to make the data a stationary series. It can be used to forecast the trend of geomagnetic disturbances. Firstly, the non-stationary historical data xt is processed by the d difference to develop the stable histori...

The research and evaluation of calcium oxide nanoparticles? (CaO) accumulation and toxicity when ingested orally were carried out. The results, obtained after the study of CaO nanopowder by scanning electron microscopy method, demonstrate, that a large proportion of particles in its composition have a size of up to 100 nm, a rounded shape and a smooth surface, while the microparticles of the chemical analog have a cubic shape with a rough surface. According to the death rate, LD50 values were calculated for male W...

Waste disposal and management is one of the urgent issues faced by mankind at the current stage of development. Waste car tires pose a significant threat to the environment, which makes their efficient processing particularly important, as the volume of this type of waste generated each year worldwide is estimated at more than 10 million tons, of which 1 million tons are produced in Russia. A review of the car tire, wood, textile, and plastic pyrolysis products is presented. The products of pyrolysis include pyrol...

In this work, the physical parameters of near Earth objects (NEO) are studied. The search for parent bodies of low-activity small meteor showers ? k-Cygnids, ?-Cancrids, and Virginids are performed among asteroids that could be faded comets. For k-Cygnids by all the catalogues of meteor orbits 2 asteroids are selected ? 153311 2001MG1, 385343 2002LV, whose orbits provide from 90% to 100% compliance with meteoroids? orbits of a shower. The 2012LL9 is only selected by 3 catalogues of meteor orbits. By catalogue of A...

This study is devoted to studying the properties of a new polymer sorbent based on polyvinyl alcohol and carboxymethylcellulose using infrared spectroscopy and thermogravimetric analysis. The influence of calcium chloride on the performance characteristics of the sorbent, such as oil capacity, floatation, moisture content and polymer degradation, is studied. The cross-linked matrix has improved properties: increasing the oil capacity and flotation time, retention of the structure when the sorbent is on the water s...

The paper presents the results of mineralogical and technological research of tailings produced during processing of rare-metal columbite ore of the prospective Zashikhinskoe deposit. The grain size analysis of a tailings sample showed that the most part of the material is represented by fine-grained particles with 53.3% yield of size fraction -0.045 mm. Mineral composition of the tailings is mainly represented by quartz, albite and microcline. Total content of minor minerals, such as muscovite, columbite, cryolit...

This paper proves news about the argillized (bentonitized) deposits that are part of a complex distribution of volcanic rock types occurring in the Gurasada region. These are the oldest deposits of volcanic origin crops out in the Gurasada open pit. Above these are volcanic deposits of andesitic composition represented by pyroclastic breccias, rare tuff levels and lava flows. The site observations, petrographic, XRD, RAMAN spectroscopy and chemical analyses indicated the formation of the bentonite deposit by weath...

The problem of obtaining compositions, that would act as biomaterials and fit all demands, is well-known. One the branch of application materials such is the hydrogels. High retention capacity of water and physiological fluids, sufficient physio-mechanical properties and safety of usage are ones of the most relevant specifications for medical hydrogels. It is quite hard to develop such formulations. Perspective initial substances for synthesis are gelatin (peptide native to human collagen) and tannin (natural comp...

Geophysical surveys of wells represent a wide range of methods, the rational integration of which make it easier the solution of geological problems. In this article, the authors investigate the issue of identifying the parameters of hydraulic fractures. This method is one of the frequently used methods for increasing well productivity. Modifications of nuclear logging and the possibility of acoustic logging are considered on the example of data before and after hydraulic fracturing in carbonate and sandstone depo...

Currently, particular attention is paid to the study of connection between geophysical phenomena and technogenic processes. At the same time, the structural parameters of the Earth?s internal structure and its core, change in natural characteristics of water basins as well as dynamics of oil and gas deposits are being investigated. This paper describes a new method for studying geophysical phenomena depending on the state of large water basins. With this purpose, we conducted a correlation analysis between astrome...

Conveyor belts are used for a long period of time in the industry branches where potentially explosive atmospheres could occur. The use of conveyor belts in industrial spaces with danger of explosive atmospheres, implies fulfilling by these of certain safety requirements, in order to prevent the ignition sources of explosive atmospheres. The need to provide the highest level of protection in the industrial spaces with danger of explosive atmospheres led, on the one hand, to the use of conveyor belts with adequate ...

Urban noise is affecting an increasing number of people and this is why it is becoming a major environmental issue, being a known fact that it affects all human activities and constitutes a stress factor with negative effects on health. It can affect the population both physiologically and psychologically, having an influence on the elementary activities such as sleep, rest, study and communication. Noise in the environment - a harmful and unwanted sound from the outside - is spreading, both in duration and in geo...

Geodynamic processes and seismic activity are considered to be the prime driver of horizontal and vertical movements of the Earth's crust in the Balkan Peninsula. One proven method for continuous monitoring of ground deformations is the use of data from active radar remote sensing. These data are the basis for the creation of interferometric images (IFIs) for quantitatively assessment the recorded ground movements of the Earths? surface within a fixed time interval. For this research a set of IFIs were created for...

Stormwater presents a significant problem in urban areas, especially in large cities. The intensified formation of impermeable surface leads to suppressing permeable-vegetation areas and, subsequently, substantial changes in the area's hydrological, environmental, and ecological characteristics. By changing the city's spatial structure, there may be an increase in flood peak, volume of runoff, and rising pollution in urban stormwater. As a result of this phenomenon, the aquatic environment can be degraded by chang...

The aim of the work is to create methodological provisions to justify the safe parameters of the thermal regime in permafrost rocks during the construction of underground complexes of small power nuclear plants in the Arctic region. The idea of the study is to assess the thermal regime of long-span mining excavations using mathematical modeling methods. To ensure the stability of underground mine excavations at the construction stage in the permafrost, the authors verify the use of various heat-protective systems....

The development of rural areas is important for the economy of any country. In Latvia, the development of rural areas depends on economic growth in the key industries for the rural areas ? agriculture and forestry. Accordingly, it is important to use the various support instruments of the European Union (EU) Common Agricultural Policy (CAP) for rural development, which include financial support not only for agriculture but also for forestry. Therefore, the overall aim of the present research is to assess the use o...

Saline lakes located on the territory of Kulunda lowlands with semi-arid climate are unique ecosystems, geochemical features of which are constantly under the pressure of intense evaporation. Their hydrological and chemical balance, however, strongly depend on inflow from rainfalls, groundwaters and rivers. Surface and groundwaters of Kulunda lowland are formed under the influence of soda salinization and are characterized by an alkaline environment. The salinity often exceeds 1 g/L and can reach 2.5 g/L. Major io...

Nowadays petroleum industry has a clear trend of depletion of conventional resources in traditional producing regions. As countries and petroleum companies are looking for the new directions of the development there is a need for evaluation and forecast of development of regions with high petroleum potential. The research focuses on one of such regions ? Easter Siberia of Russia. The region on one hand holds large resource potential that can provide base for sustainable development of the area and country in gener...

The article deals with a set of regional problems that require early adoption of political, environmental, institutional and scientific solutions to ensure sustainable development of the Kaliningrad region. The main problems are the imperfection of the legislative system, in which watercourses and lakes have different ownership forms to make it difficult to determine legal liability for the condition of water object. The imperfection of local management systems and the irrational separation of powers between autho...

Cleaning contaminated soil from heavy metals is a very important issue for Ukraine at present. Soil pollution is considered to be the result of metallurgical and chemical industries, as well as the irrational application of chemical plant protection. The goal of the studies was investigation of effectiveness of phytoremediation with co-cultivation of herbaceous plants as one of decontamination methods. An innovative method of cleaning soil from heavy metal contamination using a combination of switchgrass and peren...

We analyze the micro-seismic noise recorded at five seismic stations ? DEC, DJJ, FMP, MWC and RPV. They operate within CI: Southern California Seismic Network (SCSN), USA. The data set is collected from 01 July 2018 till 31 July 2019 and all seismic events with a magnitude Mw?4 are excluded. Our main goal is to find the effects of seismic noise synchronization between different seismic stations using data relevant to the vertical seismic components. The width of the multifractal spectrum, the spectral exponent and...

The aim of this work is to experimentally study the synthesis of carbon nanotubes and nanofibers by catalytic pyrolysis of methane-hydrogen mixtures, as well as to develope a kinetic scheme that takes into account the accelerating and suppressing effect of hydrogen on pyrolysis. Carbon nanotubes were synthesized in a laboratory kinetic setup with a vertical quartz reactor at a temperature of 700?. The oxide system (Fe0.45Co0.15Al0.40)2O3 obtained by combustion method was taken as a catalyst. The hydrogen concentra...

The research of 2D carbon-based nanomaterials has become very intensive since the discovery of graphene. Many different preparation procedures of graphene and graphene derivatives have been reported. The aim of this paper was to prepare and characterize partially oxidized graphite oxides, which were prepared from nanographite by adding different amounts of potassium permanganate as an oxidizing agent. The C/O ratio was evaluated from X-ray photoelectron spectroscopy, energy dispersive spectroscopy, and elemental a...

Aim of the article is to determine criteria and indicators of urban territory efficiency based on the concept of high and best urban territory use. Efficient use of urban territory is considered to be conformity between the urban land use and the City interests as a unified social-economic spatial system, rational location of different functional properties on the urban land, considering municipal and local needs of the land users System formation for efficiency criteria and indicators for urban territory use invo...

Greenhouse gas emissions are high among global environmental issues, which is also true for Russia. Based on an analysis of government reports on the state and environmental protection of the Russian Federation and on the state and use of the subsoil of the Russian Federation, it has been established that over the past five years at least 70% of greenhouse gas emissions in Russia account for the fuel and energy complex. Significant reductions in the emissions of these gases in industry are very problematic due to ...

The study of thinking, as well as any subject of psychological science, is determined by theoretical ideas about it, as well as various specific tasks. Currently, several theoretical approaches to the study of thinking are used. The system approach is based on the position that the specificity of a complex system object is not limited to the features of its constituent elements, but is primarily related to the nature of interactions between elements. In the process of system analysis, not only the causes of phenom...

Rockfalls are very common in Romania and represent a severe threat due to their high propagation velocity that, independently from the volumes involved, can be extremely dangerous to people and any civil engineering works like dams, roads, and adjacent buildings. Therefore, it is necessary to preliminary identify those areas most prone to this type of process to pursue territorial planning with an awareness of hazards and risks [1]. Tarnita Dam is located in Cluj County, on the left bank of Tarnita Lake/ Reservoir...

Russia is one of the top five countries for the extraction of aquatic bioresources. Although the contribution of fishing to the gross value added is insignificant, no more than 0.3% of the national level, for residents of the coastal regions of the country, the effective use of aquatic bioresources determines the level and quality of their life, guaranteeing earnings, supporting the traditional way of life. A comparative analysis of technical efficiency in 14 Russian coastal regions was carried out in order to ide...

In this work the quality of the slim-tube packing was demonstrated, the inner diameter and porosity was determined by using X-ray computed tomography. The literature analysis of slim tube packing over was carried out. It is noted that in all cases of slim tube does not accept the most theoretically possible dense rhombic packaging. Moreover, the presence of interstices due to loose contact of the grains to each other illustrates the technological limitations when filling out. To confirm the absence of signs of def...

The article focuses on studying new Baltic amber processing technologies. This topic is relevant primarily for regions where amber is being mined commercially, including for the Kaliningrad region of Russia, where the largest industrial amber deposit in the world is located, developed by one enterprise ? the Kaliningrad Amber Factory. Having a specific production structure with a large share of amber for pressing and amber for chemical processing against the background of increasing amber production, the Kaliningr...

In the paperwork are presented new aspects regarding test results of galvanic cells used in the apparatus intended for use in explosive atmospheres. In the first part of the paper was presented the explosion risk. The explosion risk involved by the presence of technical equipment in areas endangered by the presence of flammable substances is manifested through two sources of risk. The spark ignition is due to electrical equipment, electrostatic discharges and mechanical impact. The mixtures of air with flammable s...

The dynamic impact loading has significant influence on the conveyor belts operation time. This paper focuses on the tensile properties of fabric conveyor belts subjected to the impact loading induced by dropping a hammer. The induced damage of the conveyor belt was inspected after the drop. The impact of the hammer simulated the belt stress at the chutes where the transported material falls onto the belt. The falling material usually damages the belt on its surface, i.e. the rubber cover layer that protects the b...

The main, officially regulated, stages of creating and maintenance of a cadastral map are presented. Accentuation is placed on the technology, used for measurement of cadastral objects during the last recent decades. A comparison between the technological potential of Terrestrial Laser Scanning - technology and the legally approved technologies is done. Practical experiments for determining of the applicability of the Terrestrial Laser Scanning ? technology for the purposes of the cadaster are implemented. Surveys...

The study object is the research of the suitability of some maize hybrids (Zea mays L.) from Croatia. There were six cultivars of maize from Croatia: OSSK 403, OS 430, OSSK 515, OSSK 552, OSSK 617, OSSK 635 while as standard check was used hybrid NS 640 which is among the most used hybrids in Kosovo. Most of evaluated maize hybrids showed very high level of adaptability in agro-climatic condition of Kosovo. Six maize hybrids F1 generation from Croatia were tested, during the growing season, in agroclimatic conditi...

The data warehouse in the information system is intended to reflect the changing part of the domain model. In classical information systems, this part includes data values, and the storage, implemented as a database, and the system itself can be considered static in time objects. Modern conditions for the functioning of information systems are characterized by the requirement for the possibility of modifying the functionality of the system at the stage of its operation. In this regard, not only data values, but al...

Being released into the environment, the nanosized particles are present in it in the form of a colloid. At the same time, the colloid has an ability to change its properties, including its dimensionality, depending on the physical conditions, as well as composition of the dispersing medium. Nevertheless, this circumstance is irrelevant when assessing the risk associated with the spread of nanosized particles in the environment. The conditions under which the colloid retains its property of nanoscale dimensionalit...

Anthropogenic activities disrupt hydrological regime (e.g. lake water level, river flow), and water quality changes due to pollution and affect ecosystems by disrupting the cycles of substances and water cycle. The composition of natural surface waters can be altered for a many reasons, for instance climatic, geographic as well as anthropogenic. Agriculture depends on a use of fertilizers, a use of pesticides, and a transport which turn agricultural land into a nonpoint source of surface water pollution. The agglo...

The article presents methodological approaches to the improvement of the environmental monitoring system. To increase the objectivity and to improve the visual aspects of data presentation during ecological monitoring, the authors proposed to involve remote sensing methods of the Earth and geoinformation technologies. The presented set of methods is effectively used for general, operational and background monitoring. The authors have developed an algorithm for monitoring the state of ecosystem components by remote...