Browse

The main purpose of the research was to create a comprehensive methodology to assess, predict and prevent the consequences of the negative impact of water-reservoirs on the environment, provide the safety of population and infrastructure; to find a way allowing jointly realize the interests of hydropower and coast protection. To achieve this goal, the following methods were used: full-scale experiment, field-expedition surveys on operating reservoirs, informational analysis, mathematical methods of least squares, ...

ADI (Austempered Ductile Iron) - a bainitic ductile iron in which the resulting structure is obtained by the isothermal decay of austenite in the bainite region is currently a very promising material, which has a very wide application in various industries. It is characterized by a particularly favorable combination of strength and ductility, which exceeds the properties of heat-treated steels in the strength range of 800 - 1500 MPa. Its production is problematic because the ferritic or ferritic-pearlitic SGI (sph...

Environmental education is one of the cross-cutting topics in the school system of the Slovak Republic. Cross-cutting topics have a globally and socially significant character, and schools must educate students about these topics either by implementing them into the content of compulsory subjects (e.g. language teaching, mathematics, history...), or by cross-cutting topics can also be taught as separate subjects. Environmental education focuses primarily on how to teach students a positive approach to the environm...

The inhabitants produce the sump waters and accumulate temporarily in the sumps. This is sewage that must be treated before it is discharged to surface waters. Slovak legislation does not allow the discharge of such waters into the soil. The possibilities of sump water treatment are given by the water management equipment of the given locality where sewage water is produced. The most common treatment method is transported at municipal wastewater treatment plants, which are, however, largely congested. In many case...

Recently, hydrogen is often considered as one of the prospective clean energy carriers. However, the traditional hydrogen production methods also produce significant amounts of greenhouse gases or too expensive to be industrial scaled. In situ hydrogen generation in hydrocarbon-containing reservoirs can be one of the promising ways for low-carbon hydrogen production. However, the conversion of hydrocarbons into hydrogen under the hydrocarbon reservoirs conditions has practically not been studied. This work reports...

In a climate change scenario, natural disasters as wildfires and their consequences are expected to increase. Besides the loss of vegetation, wildfires have severe effects over mountain environments, frequently affecting slope stability and eventually provoking further economic losses and casualties. The risen probability of flash flooding and debris flow is recognized to depend on a modification of the soil hydrological properties, in particular of the soil infiltration capacity, in burnt terrains. Past studies i...

Landfill and dump remediation and waste recovery are often needed as circular economy approach is more and more demanding. Complicated solutions are needed to conserve the landfill space as well as overall reduction of the amount of landfilled material is not an easy task because of the different content of contaminants. Primitive soil excavating and transporting to hazardous waste landfills is not the best solution anymore. Series of experiments using landfill mined fine fraction of waste considering complex form...

Climate change is the most pronounced in the last thirty years. In the world, but also in Slovakia, there are extreme temperatures and frequent periods of drought alternating with torrential precipitation. Neither of these two options is suitable for the country. The aim of this article was to determine the distribution of precipitation in the period 1991- 2020. Using the Mann-Kendall trend analysis, it was determined a statistically significant increase or decrease in precipitation in individual months of the yea...

Climate modifications are more and more visible nowadays. Many specialists consider human activities one of the most probable sources of this situation. Other aspects to consider are the magnitude and period in which these will produce effects. It is important to create educational premises for the young generation to limit, if not eliminate, all the possible harmful actions on the environment. The aim of the study was established considering these aspects. It is useful to determine the youth's knowledge regarding...

This paper presents the preliminary results obtained for the determination of some nutritional parameters of homemade chocolate fortified with nettle powder (NP) obtained from young nettle leaves grown in spontaneous flora, in pollution-free areas. 4 types of homemade chocolate with the addition of 2.5 - 10 % NP and a control chocolate (without the addition of NP) were prepared. Samples were analyzed from the proximate composition and mineral content point of view. The obtained preliminary results show that the ch...

In recent years, with the rise of a growing economic and technological interest in lithium mineral resources, there has been a parallel concern, on the part of some local populations and even national environmental groups, for a hypothetical contamination problem that this type of exploitations may cause on the quality of groundwater. Thus, the present study was based on an evaluation of an open-pit quarry, in the socalled Alijo quarry, located in the North of Portugal, in the parish of Canedo, Ribeira de Pena mun...

DETEX Electronic Detonator made by Kirlioglu consists of an electronic circuit with communication and microprocessor and wire bridge resistance coated with explosive material. DETEX Electronic Detonator, which identity information, delay information, charge, discharge and all functions are controlled digitally, is a system consisting of all electronic circuit elements. The system consists of a communication circuit, a master control circuit with a microprocessor, a controlled charge, a discharge and an ignition ci...

Procedural techniques are used to generate 3D models, textures, images, and effects. Procedural modelling is widely used in areas such as architecture, archeology, and video games, and is based on a series of rules and algorithms. Computer-generated architecture (CGA) is a set of rules that software uses to automatically generate models. This paper describes the process of creating three models using CGA rules and procedural modelling. The models were created using the free Blender software and the geometry nodes ...

Pedestrian roads in the Czech Republic are currently designed following the valid Czech technical standard CSN 73 6110 entitled "Design of local roads". According to this standard, the width of sidewalks is designed according to the speed, intensity, and current density of pedestrians, ie in a very similar way to the design of roads for motor vehicles. However, the vast majority of small towns do not have processed field measurements that determine the relevant values, so they only propose the minimum width of sid...

Municipal waste is defined as waste from households and other sources, such as retail, administration, education, health, accommodation and food services and other services and activities, which is similar in nature and composition to household waste. Municipal waste should therefore include, inter alia, waste from park and garden maintenance, such as leaves, grass and tree clippings, and waste from market and street cleaning, such as the contents of rubbish bins and rubbish, with the exception of materials such a...

Among the existing methods of processing waste from coal-fired thermal power plants, little attention is paid to the problem of ash disposal with variable composition. During the combustion of coals, various chemical reactions occur as part of their mineral part, resulting in the formation of a new technogenic raw material that differs from natural raw materials in chemical and phase composition and has other technological properties. Using the example of a coal-fired power plant burning coals from six different d...

In connection with the publication of the new European directive for drinking water, some new indicators of drinking water quality from the category of micropollutants have been introduced, which will have to be eliminated during the production of drinking water. The described research focused on selected progressive technologies applicable in water treatment regarding the removal of micropollutants. It is expected that for the elimination of other micropollutants it will be possible to use existing technologies u...

One of the long-term goals of the certification systems (FSC (Forest Stewardship Council) and PEFC (Program for the Endorsement of Forest Certification)) of sustainably managed forests that provide both social, environmental, and economic benefits is to completely phase out the use of chemical pesticides to protect planting material. It is in the interest of both nurseries and forest owners to find successful alternative, environmentally friendly solutions to safeguard pine saplings against Curculionidae. The stud...

Spectrophotometric methods for total protein analysis are generally simple, rapid and sensitive. Such sensitive protein assays may have applications in forensic science, in the detection of protein contaminants in drugs and in a number of other applications of research interest. Biuret reaction with proteins and peptides is widely used in clinical and biological laboratories. In this work, instead of copper sulphate, sodium hydroxide and Seignette salt, we used insoluble copper phosphate, potassium or sodium hydro...

It is advisable to conduct mining operations in the conditions of the ultimate state of the opened massif with an increase in the pit wall slope angles below the limit of effective use of combined motor-conveyor transport in the cleaning-up zone of deep and ultradeep open pit mines to the final depth. Such a design of the pit walls is achieved when mining benches from top to bottom within the boundaries of steep-slope layers with the use of in-bench loaders in the cleaning-up zone. The conditions for the occurrenc...

Disasters and extreme weather events currently have a growing tendency in the frequency of occurrence and also in the severity of the impacts. The main cause is climate change, the manifestations of which will become more and more extreme. The costs of dealing with natural disasters and the consequences of extreme weather events in terms of loss of life and damage to social, economic and environmental assets are expected to become increasingly high. The current situation therefore requires a prompt reaction and a ...

Conveyance of goods and travelling of persons through the tunnels of mines or subway is done on railways of narrow or normal gauge. In interventions in case of accidents, hydraulically operated installations with small dimensions are used for lifting and rerailing the derailed rolling stock. They include hydraulic jacks (double or single acting hydraulic cylinders), supplied with low flow rates at high pressures. Feeding of hydraulic cylinders for lifting and relocating the derailed rolling stock is usually done b...

The evaluation of radioactivity levels was performed on milk samples collected biannually for a period of 10 years (2012-2021) from two Central Romanian counties, Sibiu and Alba. The radioactivity concentrations in milk samples originated from Sibiu varied from 0.028-0.001 Bq/L to 0.347-0.017 Bq/L, from 24.017-0.977 Bq/L to 65.403-6.281 Bq/L, from 0.090-0.010 Bq/L to 0.110-0.010 Bq/L, from 0.085 to 0.110 Bq/L, for gross alpha, gross beta, 137Cs and 90Sr, respectively. The radioactivity concentrations in milk sampl...

Uranium mining companies of Kazakhstan during 15 years increased production of uranium more than 15 times using in-situ recovery of uranium (ISR). At the same time a significant part of uranium deposits contains gold, silver, palladium and rare metals like rhenium, germanium, scandium and et`s. The task was set for the complex extraction of associated metals from technological solutions of a uranium mine. Work was carried out to select and study samples of productive solutions and leaching solutions at one of the ...

In this article, the authors analyzed the importance of recycling and reusing components in hydraulic drive equipment in line with the principles of the circular economy. The circular economy is also based on the principle of 3R, Reduction, Reuse, Recycling and attempts are being made to implement this principle in all areas, in order to protect existing resources, which are limited. Unlike the economy of consumer goods where in time was used the principle of linear economy, where after manufacture and consumption...

Currently, the most common way of transporting medical products, such as blood, blood products, vaccines, and medicines, is air and land transport. Using helicopters and cars to transport the needed products is expensive and generate relatively high air and noise pollution compared to the drone delivery. This article considers the problem of air pollution occurring during standard aerial and car transport of medical products, with particular emphasis on solution used in African countries. The article presents the ...

The unique lure of the America Cup Yachting race and the generous (read lavish) resources allocated to the research of the best ratio between design and performance in its history-loaded J-Class have defined some of the most spectacular ocean ships of the last hundred years. As a software modelling experiment, we have chosen to re-imagine an engineering journey, by redrawing with contemporary tools a graceful design of the 1930s: the Ranger F yacht that became the Lionheart vessel in 2010, after more than seven de...

The link between precipitation, drought indices, and NDVI is discussed in this paper. The data were processed on the example of the extreme eastern region of GeorgiaKakheti for the period 2016-2020. The study area has landscapes of natural (mixed and deciduous forests) and agriculture (vineyards, orchards, cereals, and vegetables). The NDVI was generated using Sentinel 2 images with a 10 m pixel resolution, and the average monthly NDVI was derived using Arc map 10.8. Drought indices (SPI and SPEI) were calculated ...

The purpose of this article is to assess the quality of soil and water environmental factors in some protected areas in Romania both to establish geochemical threshold values and to highlight anthropogenic pressures where they have been identified. The activities carried out are defined spatially and temporally so that the results obtained include seasonal variations and other influencing factors that have a variability on a temporal and spatial scale. Each protected area introduced in the study was well documente...

For the period 2011-2021, 231 fish species from 18 families were established in protected area BG0000271 -Mandra-Poda-, 345 fish species from 7 families in protected area BG0001502 -Otmanli- and 169 species from 11 families in a protected area BG0000242 -Chengene skele Bay-. One hundred eighty-seven of the species were freshwater, 256 were typical marine fish species, and the other one hundred and fifteen were anadromous and brackish species. Protected species are Rhodeus amarus, Cobitis taenia, Chalcalburnus chal...

Both domestic and wild rabbits are susceptible to an increased number of parasites, however, only few are of economic importance. The aim of this study was to identify the endoparasite species present in domestic and wild leporidae from Caras-Severin county, between April 2021 and March 2022. A total of 157 leporids, 111 domestic rabbits (Oryctolagus cuniculus) and 46 wild rabbits (Lepus europaeus) were included in the study. The rabbits were grouped into three age categories: 4 months, 4 months - 1.6 years, 1.6 y...

Managing emergencies is a complex task, which involves precise coordination of many activities and people, as well as fast decision-making in environments in which critical, vital information can often be lacking. From a technical and technological point of view, in spite of all advances encountered in most industrial branches, accidents with human casualties and material damage can still occur. For this reason, the presence of special intervention and rescue teams within certain industrial/ economic units is esse...

In recent years, the development of resistance to various antibiotics frequently used in veterinary practice has been observed. The cause seems to be the excessive use of antibiotics without doing an antibiogram. The aim of this study was to investigate the antimicrobial effect of different garlic extracts on Salmonella strains isolated from dogs. The research was carried out on a number of 19 strains of Salmonella spp. isolated from fecal samples from dogs. Salmonella spp is a bacterium with zoonotic risk. Differ...

The storage of explosives and pyrotechnic articles must be carried out in complete safety conditions and only in storage facilities (depots) arranged and authorized for this purpose. The legislation in force has strict provisions on the rules of explosive & pyrotechnics storage, handling and access in the storage facilities. Failure to comply with certain provisions of the law in the product safety data sheet prepared by the manufacturer may lead to the generation of hazardous situations which may result in very s...

Ammonium nitrate used as fertilizer is classified, according to Orangebook, as a hazardous substance in Class 5 Division 1 (5.1), oxidizing substances. Although, under fire conditions, ammonium nitrate burns in certain situations, the transition from combustion to detonation can occur. Such accidents have occurred in several countries, with significant quantities, including in Romania. Such catastrophic scenarios can occur in the case of nitrogen-based chemical fertilizers, in which case the manufacturing recipe (...

The significance of organic plant growth stimulants, in the development of sustainable agriculture and increasing the fertility of degraded soils has sparked the interest of scientists and practitioners working in the field of agriculture in recent decades. On the world market, there are numerous plant growth biostimulants of various origins and compositions, as well as numerous research analyzing their impacts and roles. The study aimed to determine the novel biological activity of the new Georgian biostimulants ...

Reservoir sedimentation is the gradual accumulation of the incoming sediment load from a river. With the increasing inappropriate usage of agricultural land, the amount of sediment is becoming larger due to erosion. This undesired outcome is supported by changing hydrological and climatological conditions within a river basin. Climate change has wide effects on all processes within the water cycle, which directly affects water resources. Water management in the future must be adapted for oncoming extremes accompan...

Global climate changes, sea level rising, storm activity intensification, and increasing anthropogenic pressure are causing the activation of destructive processes along the coasts of the World Ocean. The corresponding processes are appeared at the most dangerous rates within the coastal barriers. Within the Black Sea, the total length of coastal barriers is 990 km, 703 km of which are within Ukraine. Corresponding barriers develop in conditions of active wave action and a general deficit of sediments. The maximum...

Currently, one of the main problems in the extraction of useful minerals in term of environment is their transport in quarries. With the requirements to reduce the noise of the belt conveyor track, we were looking for a suitable solution to reduce it. So, we started thinking about attaching rollers made of a material other than steel. The final solution was to insert classic rollers in polyurethane beds called suspension cartridge - which are roller holders made of polyurethane and reinforced with a steel liner to...

In contemporary architecture, glass is one of the most popular materials and considered a fundamental source for natural lighting. However, the advantage of high light transmittance has shortcomings: Intense solar radiation affects the energy balance and the well-being in indoor spaces with inadequate cooling. Vertical greenery systems (VGS) can contribute to an improvement of indoor climatic conditions behind glazed facades through natural shading and cooling of the surroundings. Natural light input is only parti...

The installation and maintenance of equipment intended for use in potentially explosive environments requires specific knowledge and qualifications for the personnel who commissions and subsequently maintain such equipment. When installing and maintaining electrical equipment, situations may arise which may in turn lead to an unacceptable level of risk with regarding to the activation of ignition sources of potentially explosive atmospheres in their immediate vicinity, due to the failure to comply the principles o...

In the context of adaptation of the water resources sector to climate change, water reuse is widely proposed and encouraged especially in arid and semi-arid areas like the Middle East. We consider riverbank filtration (RBF) an appropriate technology that efficiently and dependably procure quality water from Zarqa River thus making a contribution to protect Jordan-s remaining surface and ground water resources. The river is contaminated with treated domestic and industrial wastewater principally from the city of Am...

By product is broadly understood as a product obtained in a usually industrial or biological process in addition to the main product for which the process is carried out. The main challenge addressed to humanity as well as productive ecosystems, regardless of the form of terrestrial or aquatic substrate, is to cope with the rapid rate of growth of the planet's population. The demographic growth of the planet must be in balance with the maintenance of the environment and also with climatic shifts. By-products are o...

The energy crisis triggered globally in the last quarter of 2021, forced Romania to go through a winter with liberalized electricity and gas prices, a period unprecedented in terms of consumer prices, accentuated by the result of closing energy targets that coalfired operations as a result of the imposition of EU conditions for the restructuring of the mining and energy sector. The year before, 2020, the COVID-19 pandemic, with restrictions imposed, produced a decrease in electricity demand, a decline in coal-fire...

Renewable energy plays a fundamental role for the Green Deal and for achieving carbon neutrality by 2050. EU Directive on renewable energy revised confirms the community block objective of obtaining 38-40% of energy from renewable sources by 2030, doubling the share of solar, wind and other renewables in Europe's energy mix by the end of the decade. The European Commission recommended that Romania increase the share of energy from renewable sources used for the year 2030 to at least 34% in a future analysis. Roman...

People hear about disasters that affect the whole world daily from various media sources. These disasters include natural disasters, disasters caused by mankind or a combination of the two. This includes the war that is happening in Ukraine. Many disasters can cause a fire to occur in buildings. With any fire in a building, a safe evacuation of people must be ensured. Thus, it is important to design buildings so that when people are evacuating, they are safe. Escape routes must ensure that all people can get to a ...

The economic results of many dynamically developing European countries largely depend on the availability of mineral raw materials. For this reason, securing their supplies from import must be supported by a committed foreign policy as well as a sustainable raw materials policy in the field of their obtaining from domestic sources, both from mineral deposits, as well as secondary and waste sources. Raw material security must be based on the diversification of supply sources and minimizing supply risks. The results...

Underground mining remains one of the most dangerous occupations in the world, and coalmining is known for its high accident rates. In this paper we aim to present an overview of safety in the extractive industry and we will present statistics on known accidents. The repeated occurrence of explosions in underground mining raises questions about the measures taken to prevent their occurrence. Hazard identification and risk analysis are necessary to identify adverse events that may lead to a hazardous situation, to ...

Wastewater treatment and desalination are considered important solutions to meet the water scarcity in Jordan. The irrigation with reclaimed wastewater, that usually has elevated salinity levels, may adversely change soil structure, stability, and hydraulic properties. Water traditional desalination techniques require huge energy and capital investments. Zeolites in normal and nano scales enhance the desalination process performance and reduce its economic and energy requirements. In this study, batch experiments ...

Surfactants produced by microorganisms, known as biosurfactants, have recently found wide application in the industry, from cosmetology to oil processing. Biosurfactants are more tolerant to extreme environmental conditions and less hazardous for the environment as compared with their chemical analogues. Despite on the fact that many biosurfactant producers have been recently isolated and described, the challenge to explore new producers still remains very urgent. In the present study, the isolates obtained from r...