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The purpose of the study and research undertaken over a long period of time has its origins in current scientific and practical concerns regarding the accumulation of knowledge about the physical-geographical characteristics and of its zonal particularities, as an element that define the structure of the land fund and the quality of soils, necessary to substantiate the technologies of sustainable management of the physical, geographical, climatic and edaphic conditions from that space. The issue addressed is a com...

The work is devoted to the study of the effect of powdered WC monocarbide of different grain sizes, introduced into the composition of the binder of diamond grains of the composition 94 WC + 6Co + Cu in the manufacture of a diamond-bearing matrix of BS-NQ drill bits with a diameter of 75.6 mm, designed by ISM (Ukraine). The effectiveness of the mentioned crowns was evaluated according to the proposed indicator F= ( - mechanical drilling speed; h - the value of the deepening per single experience, - - linear wear o...

Recently, the study of new methods of extraction from vegetable raw materials, such as ultrasonic extraction, microwave extraction and extracritical fluid extraction, has become widespread. The results of the study of ultrasonic extraction in the literature showed that this process provides higher selectivity, has a shorter duration, reduces energy consumption and harmful emissions into the environment. And it is also made in the equipment which design is much simpler than the equipment for pressing. In addition, ...

The COVID-19 outbreak has heavily influenced the way many businesses operate across all sectors linked to both changes in the consumer behavior, social-distancing restrictions and also the availability of resources and services (inc. public services) for businesses. These restrictions have influenced also the work of enterprises in the sector of bioeconomy - producers, processors and distributors of manufactured goods like food, clothing or home goods and other bio-based sectors both in the stages of primary produ...

The main objectives of this study are: analysis of the associated spectrum of the geomagnetic field, time of occurrence of geomagnetic storms and comparisons between recordings made at various geomagnetic observatories in the INTERMAGNET network, in terms of frequency intensity identified and correlations during geomagnetic disturbances. A geomagnetic storm is a temporary disturbance of the Earth's magnetosphere caused by ejections of solar corona mass, coronal holes or solar flares. The data used in this paper ar...

The evaluation of the seismic action generated by blasting, aims to establish the connection between the levels of ground vibration with the parameters of the blasting and the characteristics of the geological environment related to the quarry. In order to assess the seismic effects on site of the mining / civil / industrial objectives within the quarry, the criterion of the oscillation speed of the soil particles was chosen, because it was considered to be the only reproducible parameter for the whole frequency r...

Currently the resources of rare metals, especially Ta, Nb, Be, and Li used in high-tech industries, are of great demand in Kazakhstan and worldwide. Main Ta, Nb, Be, Li, Sn, and W deposits in the Great Altai territory are hosted by Permian granitic belts that formed during the Late Paleozoic-Early Mesozoic orogeny, in a postcollisional setting. The largest metallogenic structure of the Kalba-Narym granitoid belt accommodates many genetically different deposits and occurrences. Pegmatitic rare-metal deposits have v...

The Durankulak Lake is the northernmost Bulgarian Black Sea lagoon. The hydrological regime of the lake is, for the most part, the inflow of water in karst underground cracks. Over the years, the rare cases of digging a sea-lake canal have been a significant cause of the oligohaline estuarine wetlands nature of the water body. The publication aims to present current research on the structure of the lake bottom, the heart of the substrate and changes over the years, using data from a multi-beam echo sounder and sid...

The paper presents the results of research on the possibility of calculating the investment potential of a particular area based on its spatial characteristics. The level of spatial unit in this research is local administrative unit (cities or municipalities), while the geographic coverage is entire area of Republic of Croatia. Regarding the method, the results could be applied internationally and are not limited to national borders. Furthermore, when deciding on investing, it is important to know the risk. This r...

The paper deals with statistical analyses of data on soil properties of Pellic Vertisols selected from the eastern as well western part of the Upper Thracian Lowland, in Southern Bulgaria. Based on the survey in 2019, 2020 and 2021 at conventional and organic farming the data was processed using the statistical package Statgraphics (Anova). Soil textural class was the same a light to heavy clay and the total porosity was low. Natural variability of soils was due to imposed local separateness of organic farming fro...

Romula, the most important urban settlement of Dacia Inferior (Dacia Malvensis) province of the Roman empire during the 2nd and 3rd centuries A.D., was located in the present-day Resca village-Dobrosloveni commune, Olt County, Romania. Most of the Roman town remains are underneath Resca village premises, the areas suitable for archaeological or geophysical research being limited. This paper presents an integrated geophysical study carried out in the Central Fort zone of the archaeological site in September 2020, w...

Biochar is being studied for few decades as it finds various applications in mitigating climate change, improving soil properties and water retention which subsequently potentially improves the crop yields. One of the parameters potentially predicting the crop yield is the crop density during the vegetation period as it represents the number of plants per area unit that can photosynthesize and potentially bring yield at the end of vegetation season. The paper presents the observations on the changes in canopy dens...

Public gardens and park zones are an important and widely visited component of urban spaces worldwide, however they can be polluted and even dangerous for humans and animals visiting them. The simplest way to screen the level of pollution of those green zones is to assess their ecological toxicity. In the present study, to assess the ecotoxicity of soil and ground samples obtained in 15 parks and public gardens in the city of Kazan (Russia) with 1 Mio citizens were investigated. Two elutriate assays with Ceriodaph...

The study presents a detailed analyse of the morpho-dynamic processes of the main two bifurcations of the Danube River within its delta, at Ceatal Izmail and Ceatal St. George. The first bifurcation of the Danube, called Ceatal Izmail; here the river divides into two distributaries: a northern one, the Chilia (Kilia), and a southern one, the Tulcea. Forking to the right at Ceatal Izmail (Mile 43), the Tulcea distributary stretches further to 17 km to the second main hydrographic knot Ceatal Sfantu Gheorghe (St. Ge...

Laser scanning can be used to acquire measurement data for Building Information Modeling (BIM). Terrestrial Laser Scanning (TLS) technology is ideal for this type of work. Having a point cloud of the measured object, dimension and model it in accordance with reality are possible. TLS gives the opportunity to obtain a big amount of observations, which on the one hand allows for an accurate depiction of the object, but on the other hand is troublesome during BIM developing. Therefore, the paper presents the methodol...

Utilization of renewable energy sources is future solution for providing the word energy demand and to solve the problems of climate changes. Carbon dioxide is greenhouse gas and major contributor to the global warming. Hydrogenation process of carbon dioxide with renewable hydrogen will not only mitigate the problem of global warming but will also produce valuable products and renewable energy. The hydrogenation of carbon dioxide to value-added chemicals and fuels is a promising route, providing products such as ...

In the practice of leading countries, digital transformation implies the industry principle of supporting the introduction of new technologies. At the same time, programs and projects can be built both on the principle of introducing any one promising group of technologies in several industries, where it is especially relevant, and provide for the digital transformation of a particular industry through the forced introduction of many technologically heterogeneous solutions that are in demand in a given sector of t...

The European Green Deal has an overarching aim of making Europe climate neutral in 2050. The goal is to reduce EU's greenhouse gas emissions for 2030 to at least 50% and towards 55% compared with 1990 levels. Its goals extend to many different sectors, including construction, biodiversity, energy, transport and food and includes carbon tariffs for countries that don't curtail their greenhouse gas pollution at the same rate. On 18 June 2020, the Taxonomy Regulation for climate change mitigation and adaptation was p...

The first oil discovery from Romanian Black Sea area was in 1987, relatively late compared with the first successful Romanian onshore well, more than 100 years earlier. Starting from that moment and continuing till recent years, several discoveries were done; some are already put into production and some others are still in the exploration phase. In order to extract as much oil as possible and also to define new hydrocarbon reservoirs, it is mandatory to have a proper understanding of the petroleum systems from th...

The Varna and Beloslav lakes are the most strongly anthropogenized water bodies along the Bulgarian coast. At present, the lakes are again subject to deepening of the navigable channel, which significantly changes the quality of the habitats. An ecosystem approach was used to assess the status of the populations of fish species from the Varna-Beloslav Lake Complex. The paper's main purpose is to provide up-to-date information on the ichthyofauna of the largest northern Bulgarian Black sea brackish water bodies - V...

The main objective of the paper is to analyze and evaluate what are the manifestations and impacts of suburbanization in the hinterland of the city of Presov. The first manifestations of suburbanization started in 1996 and continue even nowadays. This process brings several consequences, economic, social, demographic, environmental, etc. When looking at migration flows, Presov has shown a long-term decline in population. The municipalities located in its hinterland show an increase in population. In this paper we ...

The aim of the research is to develop a method for betulin integration into electrospinning solutions to electrospun qualitative nanofibers webs morphology with high surface area and increase bioavailability. The main challenge in this study is to prepare betulin - containing electrospinning solutions with suitable concentrations due to limited betulin solubility in water and low alcohol concentrations. Tree concentrations of betulin extracts were obtained. The operation sequence to obtain electrospinning solution...

In the last years, composite materials are increasingly used in automotive, aeronautic, aerospace, construction applications. Composite materials have been used in aerospace in applications such as engine blades, brackets, interiors, nacelles, propellers/rotors, single aisle wings, wide body wings. The fields of use of composite materials have multiplied with the improvement of material properties, such as stability and adaptation to the environment, mechanical tests, wear resistance, moisture resistance, etc. The...

The aim of this study is to identify opportunities for the development of the bioeconomy in Latvia, assessing its role in the development of the agricultural sector. Nowadays, the development and sustainability of natural resources are of great importance. The bioeconomy can be considered as one of the oldest sectors of the economy, which life sciences and biotechnology can transform into one of the most modern sectors of the economy. From a number of perspectives, one of Latvia's development opportunities is the ...

The significant development of single-board computers today can create many different threats to information security. These devices open up new opportunities for attackers, as they allow them to find new ways to carry out attacks. Since SBCs are often small in physical size, but have the processing power to run full Linux distributions, combined with a variety of different external interfaces, this allows you to create devices that can listen to sound, photo and video recording, and intercept network traffic. Met...

When considering environmental priorities in the Moscow region, it was pointed out that not only human economic activity damages the environment, but also resources a significant part is destroyed by fires and other emergencies, which number has been increasing in recent years. Land resources are among the main exhaustible resources without which human existence is impossible. State activity, first and foremost, must be aimed at the land resources effective management and protection against the human economic acti...

The DNA barcoding project provides a very quick and easy way to identify different types of organisms based on their DNA. The main objective of this study is to obtain the sequences of different species of fungi, plants and animals to map the biodiversity of Slovakia. This project also represents a new use for collections stored in natural history museums around the world. This paper shows in particular a laboratory view of the DNA barcoding project, such as the practical application of the methodology for differe...

Future climate scenarios of the Global Circulation model (GCM) show an increased frequency of heavy rainfall events, which may lead to more severe floods. It is also expected that more and more areas will suffer due to flooding as a result of growing urbanization. Public attention has increased in many parts of the world in recent years and calls have been made to improve flood warnings, including the United States, the European Union and Australia (Hapuarachchi, H.A.P, and Q.J. Wang 2008). To respond and manage f...

The climate change is strongly affected by the increase of anthropogenic greenhouse gas emissions, such as carbon dioxide, methane, nitrous oxide, and fluorinated gases. Other important atmospheric factors of climate change are stratospheric sulfur aerosols, whose ability to reflect solar radiation back to the space cause cooling effect. Sulfur aerosols have common natural and anthropogenic origin. The volcanos are a major source of particles in the stratosphere, whose lifetime depends on various atmospheric proce...

Increasing energy efficiency leads to the fact that companies operating on renewable energy sources are gaining more weight in the sector and becoming more competitive. It is not easy to manage companies working with renewable energy sources since it requires fully transparent management. Digitalization comes into play with management software that optimizes processes and energy services and solves their problems in terms of development and productivity. Over the coming decades, digital technologies are set to mak...

The article deals with the research of thermal insulation properties of thin-layer insulating material made of hollow glass-ceramic microspheres in relation to technical building installations. Until now, there has been a lack of scientific studies describing the effectiveness of thermal insulation properties of thin-layer insulation materials on distribution systems or technical equipment. In this particular case, the insulation material was applied in a two-millimeter layer to a heat storage tank and the heat lo...

The Interest in recycling of materials to reduce the CO2 emissions and reduce the energy consumption has inspirited us to investigate the influence of ferrous metallurgical solid waste material namely "slag" on the performance of traditional Portland cement composites. The scrap material was mechanically treated by crushing followed by ball milling and classification. The mechanically treated slag was mixed with Portland cement without any modification. The mix was casted into the desired moulds and allowed to sol...

Cryogenic energy storage (CES) is a large-scale energy storage technology that stores electricity in the form of liquefied gas at cryogenic temperatures. The CES system has three sub-processes, namely, charging or liquefaction, storage, discharging or power cycle. Because the main energy costs in this system are related to the liquefaction module, we will focus on the analysis of liquefaction processes. The present work aims at performing a comparative study between cycles commonly used for the liquefaction of air...

By developing this paper, we wanted to identify the opportunities for the growth and development of the Faget area in Romania, based on the specific resources available. Geographical location, natural and anthropogenic sites, as well as existing accommodation structures provide this area a high tourist potential. Natural landscapes, recreational areas, hunting, fishing, historical monuments, wooden churches, and natural resources are the most important attractions of the Faget area that can be valorised. The autho...

Environmental impact assessment is a complex scientific process that often exceeds procedural and legislative aspects. The data and information used in the EIA derive from various sources, so they must be integrated using an appropriate methodology. The established assessment methods are Rapid Impact Assessment Matrix (RIAM) and Geographic Information System (GIS), each allowing the integration of observations, data, and environmental information. The present study aims to apply RIAM and GIS to the impact assessme...

Food waste is a growing global concern, with the attention of major global organizations focusing on monitoring and finding solutions to optimize it. According to the latest data published by the National Institute of Public Health on this topic (2019), in Romania, food waste is estimated at 6,000 tons per day 49% from households, 37% from the food industry, 7% from retail, 5 % of public catering and 2% of the agricultural sector. In this context, it was proposed to implement a system based on reducing waste and w...

Many processes involving dusts, suspended or accumulated, have the potential to lead to fire, explosion or decomposition in the presence of oxygen and an ignition source. The risk of dust explosions increases as more and more products take the form of dusts or require the use of dusts during manufacture. In spite of extensive research and development to prevent and mitigate dust explosions in the process industries, this phenomenon continues to represent a constant hazard to industries including manufacturing, usi...

Previous studies have shown that secondary school students may have misconceptions about geological scientific information. By the end of secondary education these misconceptions may remain unresolved. As a result, students enter university studies and still hold them. Students of engineering, as for example civil engineering, are no exception. The aim of this study was to investigate and analyse misconceptions of this specific target group. A closed questionnaire was designed and given to 102 University students ...

Military resistant architecture (MRA) is a trend to protect civilians, settlements, the environment, and existing buildings from the strikes happening during the war. The development of military technologies and armaments brings with it the need to define new urban security solutions. In this case, it is very important to analyze the physical characteristics of the building and its surrounding, such as the tectonics and physical parameters of the building-s site. To secure the buildings from new, sixth-generation ...

This study is focused on influence of graphene nanoplatelets as additive in magnesium oxychloride cement (MOC) paste. This material composed of light-burned magnesia, prepared at lower temperatures than ordinary Portland cement (PC), is considered as its eco-efficient low-carbon alternative with properties comparable to high-performance concrete such as high mechanical resistance, stiffness., and low porosity. Two composite pastes were prepared, reference paste and paste enhanced with graphene, and subjected to se...

Geographic Information Systems (GIS) are solutions that cover a wide range of fields, from the management of urban resources, the introduction of satellite tracking and coordination of roads routes, tourism, civil protection, logistical support in case of natural disasters, land records, management of agricultural farms and forest fund, etc. At present there are many uses of science applied in society and which provide decision support for many beneficiaries - companies, public authorities. Thus, GIS with urban ap...

The importance of land assessment activity consists in the fact that the data provided by these studies constitute the basic documentation for establishing the most appropriate practical measures for protection, improvement and rational use of soils for biomass production in an optimized and rigorous dynamics. correlated with the growing demands of environmental protection. The evolution and fertility of soils is conditioned by a large number of their individual properties and by many specific processes that take ...

The waste management sector as one of the most significant economic sectors requires effective management not only in Latvia but in the European Union as whole. According to the recent (2020) available Eurostat data, 505 kg of municipal waste per capita were generated in the EU of which 48% were recycled and 22% were landfilled. Latvia ranges in the 11th position among the EU Member States with 478 kg of generated waste per capita. Romania (287 kg), Poland (346 kg) and Hungary (364 kg) are countries having generat...

Forest fires cause major damage to human habitats and forest ecosystems. Early detection may prevent serious consequences of fast fire spread. Although there are many smoke detection algorithms employed by various optical remote sensing systems, there is still a major misdetection of images containing fog. Fog exhibits similar visual characteristics to smoke. Furthermore, when monitoring dense forests many smoke detection algorithms would fail in robust recognition due to fog covering the trees at dawn. There have...

The paper addresses the sustainability of technological transport, specifically the transport of materials by pipe conveyors. Environmental aspects must also be addressed as part of the solution to the sustainability of pipe conveyors. Pipe conveyors are suitable for the efficient transport of large volumes of bulk material with a minimum of environmental pollution. Closed rubber conveyor belts are a basic structural element of pipe conveyors. These types of conveyor belts have to resist a combination of factors s...

The development of areas of bio-economy, which replace fossil fuels with bioresources in production and the provision of services, is important in many countries. Therefore, in 2017, the government approved the Latvian Bioeconomy Strategy 2030, which provides for four key integrated groups and one complementary group of measures to implement this strategy. As five years have passed since the strategy was approved in Latvia, it is necessary to assess the progress of its implementation. Therefore, the aim of the pre...

The Alto do Sobrido and Ribeiro da Serra Mines, are two antimony-gold mines located in Gondomar, Portugal, and are part of the Durico-Beirao Mining District (DBMD). In this work, we use four geophysical methods, such as gravity, radiometry, magnetic and electromagnetic, to improve the knowledge about these mineralizations and the lithologies and structures associated with them. These four methods allowed us to study these mineralizations through different physical properties. The gravimetric method allowed us to a...

The competitiveness of product being offered is very important for company's competitiveness and successful business development. In Bulgarian forestry the main product is timber. It provides more than 85% from the revenues of state enterprises (DP), which are established with art. 163 from Forest Act (ZG), for management of state forest territories. Because of that the goal of this paper is to offer and verify practically applicable approach for complex quantitative assessment of competitiveness of timber, which ...

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...

The design of a suitable ventilation method for buildings aims primarily to improve the quality of the indoor environment of buildings and thus to influence individual parameters of the indoor environment such asCO2concentration, air purity, the required amount of fresh air according to the proposed operation of the building, temperature and humidity. Proper design and installation of a forced ventilation system with heat recovery can significantly reduce the energy required for heating or cooling. The paper focus...