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The threats of global change in the 21st century are becoming increasingly significant. Soon, humanity will face not only new climatic phenomena, but also many other related events, which clearly include demographic unrest on many continents. The consequences of these events will be reflected in increased tensions between countries, peoples and groups of people, who will tend to avoid new, in many cases negative, conditions. . The changes will affect not only vulnerable areas, but also regions with a relative calm...

In any activity, as well as in public services, employee motivation is a challenge. Seeing the importance of Human Resources in the growth and success of any organization, it is pushed to them to study leadership styles, which is used effective style to achieve the set goals and increase the effectiveness of the organization. Leadership has an impact on the company's success by aligning common goals of the organization and the individuals within it, this influence did empower individuals to take the necessary acti...

Optimum exploitation of the agricultural lands in the presence of polluted aquifers by surface sources requires close monitoring of the groundwater level in both periods of massive rains or, on the contrary, during drought seasons. The non-steady flow in the aquifer groundwater is described with the Boussinesq's partial differential equations. The boundary conditions consist of the groundwater level required at the margins of the analyzed area, in conformity of the pollutant emissaries, using the double steps meth...

Radon (222Rn) is a natural gas produced by the radioactive decay of uranium-bearing rocks and soils in the Earth?s crust. Geology is one of the main factors controlling source and distribution of radon. Most rocks and soils possess small amount of uranium, but there are particular types of bedrocks and unconsolidated deposits characterized by higher than average uranium contents. These lithological types include some granites, light-colored volcanic rocks, phosphatic rocks, ironstones, limestones and shales rich i...

The onshore Thermaikos basin is the northwestern extension of the offshore Thermaikos basin, located at the area west of Thessaloniki, in northern Greece. It consists a sedimentary basin, where thick sediments dating from Paleogene to Quaternary are overlaying the older ophiolite and deep-sea Mesozoic formations of Axios geotectonic zone. Thermaikos basin, both offshore and onshore, has been considered as a hydrocarbon promising area, with a proven gas field in offshore Epanomi area in Thessaloniki gulf, hence a n...

The study area is located in northeastern Bulgaria (Northern Bulgarian Black Sea Coast), between the Ikantalaka locality, Balchik municipality and the village of Bozhurets, Kavarna Municipality, Dobrich district. From an engineering geological point of view, the region falls within the Balchik Landslide Area, which is characterized by old and recent landslides with linear-stepped and packaged construction. In the formation of landslide processes in the study area, the direction of subsidence and the angle of incli...

The greenery absence is one of the current problems of the central parts in urban area not only in Czech Republic. Simultaneously, the urban greenery is important not only for human well-being, but also fulfills a number of ecological functions for the urban area. It can be expected that this problem - greenery absence - in urban space will become more important in the future, while the placement of new elements of green infrastructure here is already practically impossible. This is mainly caused by the historical...

The rapid development and industrialization in recent years have posed a great challenge to the environment and air quality due to the increased anthropogenic emissions of particulate matter. Both PM2.5 and PM10 (particulates with aerodynamic diameters equal or less than 2.5 and 10 ?m, respectively) have become the forefront focus due to their adverse effect on human health and climate. Therefore, the assessment of chemical composition of PM2.5 and PM10 defining in general their toxicity and its correlation with m...

The peculiarities of ecological conditions determine different scenarios of adaptive changes in the immune and genetic status with the subsequent formation of eco-caused pathology. Purpose of the study: analysis of the peculiarities of the immunological and genetic status of the child population in the extreme conditions of the Arctic Circle of Russia under the combined impact of anthropogenic chemical and climatogeographic factors. Materials and methods . Immunological and genetic testing of 98 children (the terr...

Eastern sedimentary basins in terms of oil and gas bearing in particular the Balkhash from the point of view of oil and gas content is considered for the first time. The results presented are obtained on the basis of an analysis of the consideration of the paleogeographic conditions of the formation of the Paleozoic, Mesozoic and Cenozoic formations. The lithological composition of the sediments of the Balkhash depression is given in detail. The role of paleogeographic environments as one of the factors influencin...

At present, the impact of production factors on natural conditions and the environment of human life assumes a pronounced global scale. The level of exposure to technological factors and the degree of environmental degradation is the main problem of modern society. The sharply aggravated environmental problems set the task for science to comprehend the prevailing trends in environmental and economic development and to develop fundamentally new concepts for the influence of production factors on the development of ...

The work dwells on finding solutions to a task related to substantiating locations where instrumental measurements should be performed within a program for monitoring over exposure to electromagnetic radiation (EMR) in radio-frequency range in a large industrial city with its area exceeding 800 km2 and population being more than 1 million. A database has been created (and bound to a vector map of the city) containing data on 2 011 sources of EMR in radio-frequency range. They were 1 666 basic mobile communication ...

The Tyrkanda gold-bearing region is located in the South-East part of Yakutia within the Aldan Precambrian granulite-gneiss region and the Tyrkanda area of Mesozoic magmatism and gold mineralization of Aldan-Stanovoy shield. Despite the long history of development of gold placer deposits in the area, primary sources for some of them have not yet been founded and are not characterized. The typochemical and morphological features of native gold from placers of Tyrkanda gold-bearing region, in particular r. Bolshaya ...

For the rational organization of natural territories of historical and cultural significance, it is necessary: to develop a long-term strategy for nature management, to implement functional zoning and integrated landscape and environmental monitoring. The monitoring should be based on a detailed large-scale landscape-ecological research of the territory, including the compilation of a cadastre of landscape and landscape-historical complexes, an assessment of their ecological state and the identification of the mai...

The article demonstrates application of distance learning in foreign language teaching at the Faculty of Manufacturing Technologies in Presov. The study of a foreign language is very closely connected with professional subjects. There is a close connection with many engineering disciplines within all study programs. The method of distance learning is an important part of the modern education. The implementation of blended learning to the study process is needed for the newly accredited study programs at the Facult...

In human-induced landscape transformation, soils are the most informative component, as they are open heterogeneous systems that have a desire for self-regulation and self-healing. Each type of soil is characterized by its own structure, as the shape, size and quality of structural separations in different soils can be different. Soil is considered well structured if it contains more than 55% of aggregates between 10 and 0.25 mm in size. Black earths are characterized by the content of these fractions in the range...

Sustainable waste management promotes less waste generation, reuse and recycling as well as waste recovery. This includes more intelligent methods and systems using for waste managing and processing. This paper presents a literature review regarding information about trends and possibilities for their application. Such technology has the power to completely displace conventional methods for the collection and transportation of household waste. However, a more detailed study the advantages and disadvantages of such...

The management of protected territories in Bulgaria is a subject to the Bulgarian and European environmental legislation. The used plans for management provide basic information on the condition of abiotic and biotic components of the natural environment in the protected territories and Guidelines for their management, control and conservation. The water resources with their specificity and dynamics of alteration are a major abiotic component that impacts on functioning, development and conservation of ecosystems ...

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...

At present, the use of oil and gas as efficient energy sources determines the pace of development not only of the economic system, but also the social sphere. The oil and gas industry occupies a special place in the Russian economy and ensures the life-sustaining activity of the national economic complex and forms a significant part of the budget revenues. The idea of sustainable development comprises the economic efficiency of mineral resources management in a social and environmental perspective. This approach a...

Pile driving technology remains the most widespread method in Arkhangelsk where the presence of soft soils is an engineering-geological feature. High quality of the pile shaft in the soft soil is guaranteed by using precast piles. New construction in the urban conditions is mainly carried out next to the adjacent buildings. During construction of a multi-section building ground works and pile driving are sometimes performed separately for each section but not for the entire building at once. The monitoring of pile...

The purpose of this research is to identify the key features and main components of the successful integration of cloud technologies into the infrastructure of modern business. This paper gives a general overview of cloud technologies, including the overall stages of their development, and highlights the main advantages of integrating cloud technologies into modern business. Cloud technologies are rapidly gaining popularity around the world. Besides business, they have spread to almost every person and have become...

Concrete constructions are normally reinforced with steel, which is protected by high alkalinity of the concrete against the effects of corrosion. The steel reinforcement corrosion is causing by the reducing the alkalinity of the concrete or by the presence of chlorides in such an aggressive environment which make reduction the cross-sectional area of the reinforcement and a loss of cohesion. Underground constructions are often found in an aggressive rock environment and the protection of steel reinforcement is mo...

Chaga is a perennial parasitic fungus of the Hymenochaetaceae family that lives on the bark of aged birch trees. Chaga contains a comprehensive set of substances that are essential for humans. In this context, the Chaga mushroom is widely used in the pharmaceutical industry. Chaga containing drugs are generally used as anti-inflammatory and restorative. Chaga can also be used as part of the complex treatment of tumors of various localization, diseases of the gastrointestinal tract, it helps to mobilize the body's ...

The paper deals with developing of an innovation of the device called "Device for sensing mechanical-physical and optical properties of bulk solids" used for examination and localization of life-threatening places. The device has been created of a standard device using an education model-the ideas of a student in cooperation with a teacher mutual sharing knowledge and experiences and enriching each other. The device has been patented and published in Espacenet database under European Patent Office and represents a...

The main purpose of this paper is to evaluate the impact of industry wastewater containing synthetic textile dyes on the structure of activated sludge. The aim of the research is to qualify direct impact of the textile dyes, dosed in one week into the experimental system of wastewater treatment plant, on constitution, structure and function of activated sludge. Activated sludge samples (5 mL) were taken from the aeration tank of experimental waste water treatment plant before, during and after measurement and the ...

This work focuses on the possibility of practical application of two approaches ? classic least square method (LSM) and Huber?s M-estimator (HME) method ? to the analysis of time series of celestial objects? measurements. Using those methods, the values of dynamic selenophysical parameters were produced from the processing of observations of Mosting A lunar crater in relation to the lunar limb. The reason for the use of the two approaches ? LSM and HME ? at observations processing is that LSM in some cases does no...

Bulgaria's European presidency has put forward a proposed step-by-step plan compared to relations in the Balkans. Improving relations is related to important aspects - infrastructural, economic, social and cultural. This is a great effort from all Balkan pages. Rethinking the past and outlining the future can be achieved through a common strategic goal or goals. The settled forces of the border towns and the business relations between them will reach tendencies for depopulation of some regions in Bulgaria. Such a ...

Machine Learning (ML) is the study and the usage of the mathematical algorithms which can improve their performance without the need for human interaction. These algorithms are considered as a subset of Artificial Intelligence (AI). Machine learning algorithms use past data as input and produce new predicted values as an output. Machine learning algorithms have been used in many areas for solving an innumerable number of tasks. However, the various tasks need applying of different machine learning algorithms for o...

In the article is analyzed the influence of relative stiffness and bonding of the "foundation -subsoil" interaction system on the value and distribution of the vertical normal and shearcontact stresses. The analysis of the calculated deformations of the foundation focused onthe qualitative and quantitative evaluation of the non-uniform settlement, respectively therelative deflection and flexibility of the foundation. In terms of relative stiffness areanalyzed the shallow square foundations from the "perfect rigid?...

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 paper presents the examples of georadar sounding of rocks and soils of mining constructions and facilities in order to control their internal structures and conditions. The measurements have revealed that in the inner zones of inhomogeneities the induced electromagnetic field is distorted due to the difference in the physical properties of the zone? rocks and the main rock mass. The authors have established that the intensity of the wave field distortion is determined by the contrast of the physical properties...

Introduction. The extreme nature of environmental meteorological factors and the asynchronous change of day and night are considered to be one of the reasons leading to a decrease in the life quality in the Extreme North. These might lead to a violation of adaptive mechanisms under certain conditions. The combination of variants of polymorphic candidate genes causes functional disorders of the cardiovascular system. The research aims at studying the genetic polymorphism in children having pathologies of the cardio...

As a result of joint research of employees of the All-Russian Research Institute of Reclaimed Lands and Tver State Technical University, aerobic-anaerobic solid-phase fermentation of a mixture of organic animal waste and hard-to-hydrolyze raw materials of plant origin was developed. Biotransformation of the fermented mixture takes place over several days, and the pasteurization effect is achieved as a result of short-term processing of the fermentation product with ultrasound intensity of 50-60 W/sq.cm. Liquid ani...

The expense of restoring of excavators cutting bodies is increasing these days in the Most Basin area, primarily the replacement of tooth because of abrasion expense. The main reason is the complicated geological situation of overburden rocks, first of all the occurrence of sands and hard structures in the overburden cuts rocks in the deep horizons of open pit mines. The main target of this article is the brief description of realised research. It is design of the optimum methodology of bucket tooth cutting body h...

Every country in the world has to be ready in time to deal with extraordinary crisis situations. One of the primary approaches is to have a good knowledge of the threats, which can cut off technical operational equipment of the infrastructure or significantly limit their functionality. Due to the fact, that most structures of the technical infrastructure are currently on an international scale, it is necessary to deal with these crisis events, e.g. in EU countries, by way of mutually accepted legislation and metho...

Diatoms are widely used for paleoindication, through which the main stages of life of lakes against the background of changing environmental conditions determined by both natural and anthropogenic factors can be reconstructed. The results of the diatom analysis of a 96 cm long continuous sediment core from the artic lake in the Pechora River delta (Nenets Autonomous Okrug, Russia) were presented. The arctic lake under study is characterized by low conductivity and nutrients content. In 33 samples taken from the la...

The object of this study is the variability and trends of extreme 24-hour precipitation in Bulgaria during the period 1931?2019. The regime of potentially dangerous precipitation (? 60 mm/24 h) has been analyzed on the base of available daily data from all stations of the national meteorological network with continuous observations at least in half of the study period. We focused our attention on this type of precipitation because it often causes significant economic damage and human casualties. The advanced tools...

Fires in natural ecosystems, including forest fires, destroy whole ecosystems of states and can be extremely catastrophic. Total square of forest fund in Ukraine is 10.4 million ha, 9.6 million ha of which is covered with forests vegetation. Forest cover of the state is 15.9%. For the last 50 years, the square of the forests increased at 21% and wood stock ? almost three times. Suppression of fires in natural ecosystems and forests would be impossible without transportation means. That is why, during emergency man...

The authors proposed management optimization areas of Kherson region territorial communities? recreational resources in the process of decentralization and reform of administrative and territorial structure of Ukraine. The perspectives of local socio-economic development, new economic opportunities and directions of tourism and recreational capacities using through international partnership are identified, including involvement of Kherson region and certain territorial communities in the international project ?Dec...

Anthropogenic factors of the production environment of oil production are characterized by more intensive influence of these factors in contrast to the external environment, which can create the prerequisites for early development of adaptation disorders, functional changes in immune and humoral regulation, especially with their genetic determinism, and the formation of an increased risk of development and weighting of cardiovascular pathology in those engaged in oil production. The aim of the work was to study th...

The influence of the temperature fluctuations on the staffs for precise levelling are investigated. The investigations are realized on a real levelling line in the State levelling network of RBulgaria. There is analyzed the influence of the temperature extension of the staffs on the whole height difference between the outlying benchmarks of the line and on the three intermediate sections: with representative low temperatures; with a various, from topographic point of view, terrain and with a sharply temperature ch...

Assessment of available geophysical and geological data for the Bulgarian Black sea shelf is presented in order to give a conception about the simplicity and functionality of the methodology of how the records are stored. Data on these disciplines provide valuable information about the history and the dynamic of the shelf and can be in use for numerous investigations. Geological, morphological, geophysical, geochronological findings show the changes in the shape and movements of this region from the aquatory, its ...

Bicycle transport is usually perceived as environmentally friendly alternative of car transport. From the point-of-view of everyday mobility, the bicycle is relatively fast, inexpensive, healthy and environmentally friendly mode of transport, which helps people to overcome the dependence on the car. For this reason, promoting cycling is one of the key concepts of sustainable mobility, which influences the creation of mobility management plans in recent decades. However, not everything is so bright. This article re...

In order to ensure economic development and respect of the principle of sustainability, the European Union has introduced a number of innovations in the legal framework and thus provided a large amount of money to modernize the economy. The benefits brought by the new economic model (circular economy) are reflected in the reduction of harmful effects on the environment, increased resource productivity, job creation, reduced dependence on raw material imports, increased competitiveness of the economy and encouragin...

Stockpiling and conservation of mining waste is of high social and environmental importance, since it is the mining industry that is characterized by large volumes of waste. It is almost impossible to update information on the ecological state of ore mining and processing wastes accumulated during the deposits development and their impact on the environment by studying the archives of enterprises, due to the incompleteness of the stored data that is not within the scope of industrial interests. In this regard, it ...

Nowadays, the problem of ambient air pollution is a challenge in the world. Many government initiatives are being implemented to mitigate the impact of pollution on the environment as well as other aspects of human health and life. A particularly important case is urban areas exposed to the negative impact of industry, for example mining and power plants. In most cases, measurements are carried out pointwise in selected places and periodically with a constant interval of time. There is a lack of dedicated tools th...

The universities in Bulgaria operate in a very dynamic environment. The Ministry of Education and Science (MES) changes annually the requirements that their systems must meet. Changes can be small and affect only parts of the information systems in use or impose fundamental changes. To cope with this challenge, each university has a choice - either to move to a high level of digitalization or to maintain a minimum digitization of processes, so that no correction is needed in them, thus increasing the hours of work...

Various eco-friendly and cost-effective hydrocarbons clean-up methods based on natural sorbents were developed and tested, in order to prevent the massive environmental damage due to the petroleum spills. Among these sorbents, natural zeolitic tuffs are easily available and have numerous adsorptive properties that make them appropriate for the removal of petroleum substances. This study aims to preliminary investigate the sorption capacity of natural zeolites from a deposit located at Racos, Brasov County, Romania...

The need to make innovative changes in the professional training of students is due to the fact that today future specialists require not only deep knowledge, but also the ability to acquire new knowledge in a rapidly changing situation and use it to design their own activities. Recently, in the theory and practice of professional education, more and more attention is paid to active forms, methods and technologies of training, which can become an effective means of training specialists. The goal of innovation is a...