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Soilless hydroponic cultivation of cucumbers (Cucumis sativus L.) has expanded rapidly during the last few decades. One of the key factors in achieving high productivity in industrial greenhouses is the choice of growing medium. Rockwool has become dominant, especially in Europe. However, in addition to energy consumption during production, landfilling of rockwool as a non-biodegradable material is expensive and poses an environmental risk. Therefore, there is increasing use of organic substrates in the soilless c...

The presented paper deals with the issue of assessing the condition of winter wheat (Triticum aestivum L.) stand during its development in the spring period. The field experiment was established in 2020; two plots sized 25 ha and 16 ha were selected with a model plant of winter wheat. In the spring period (BBCH 35 and BBCH 51), both plots were monitored using an unmanned aerial vehicle (UAV) and Sentinel 2 satellites. After the end of the monitoring, spectral analysis of pictures taken was made and a basic NDVI ve...

Reducing emissions of nitrous oxides in the agricultural sector is one of the mainchallenges. Stable isotopes are one of the tools that record information on changes ingreenhouse gas production, transportation and emissions. The relationship between theprocesses in soil and emissions entering the atmosphere. Stable isotopes, which are directisotopes of nitrous oxide emissions from soil, are already recognised as a promising toolfor tracking atmospheric nitrous oxide emissions from various studies. The purpose ofth...

The COVID-19 pandemic has caused large-scale institutional and behavioral "shock effects" in many fields of human activity, including education. All over the world more than 1.5 billion of students at schools and universities have been unable to attend classes from time to time [1]. Various countries and communities have been forced to look for quick decisions on digital learning platforms [2]. This gave a remarkable boost to online learning. At a time of crisis educational organizations should carefully think ove...

Modern town and regional planning was shaped institutionally under the conditions of industrialisation and the associated growth in the economy and population in towns and industrial agglomerations. The aim is to manage this growth and create the conditions for its continuance with the smallest possible negative impacts on conditions. The main resources for ensuring problem-free growth consists of seeking out suitable areas for the construction of new housing and industrial plants, and the regulation of constructi...

Frequency of storms and wind speeds in gusts had been increasing in Northern Europe in last decades, causing more damages to forest stands. Establishment of mixed stands had been suggested as one of the methods to reduce wind damages in future, however, empirical information on actual efficiency of this approach is still limited, especially in relation to summer storms. Therefore aim of our study was to assess summer storm damages in mixed birch spruce stands. Area influenced by the storm of June 2021 in Northern ...

The use of electrical equipment in potentially explosive atmospheres requires special attention, namely from the point of view of their construction and maintenance. Together with the technological developments, these objectives can easily be met, objectives which are defined by European standards concerning the construction, use and maintenance of explosive proof equipment. Evaluation of explosion-proof protected electrical equipment in scope of certification is extremely important considering the risk of explosi...

The presented article deals with a comparison of the structural and technical condition of sewerage systems operated by water companies and owners of water management infrastructures in the Czech Republic. The owners and operators of the sewerage systems in the Czech Republic include some municipalities with less than 2,000 PE who operate the sewerage themselves (the so-called "self-operators"). The Water Supply and Sewerage Act No. 274/2001 Sb. specifies an obligation for the operators to generate reserve funds f...

The structure of the tailings dump in the technological chain of a mining enterprise is functionally designed for storage of ore processing waste and clarification of technical water in the recycling water supply system of the mineral processing plant. In most cases, a tailings dump is an aggradation facility, the capacity of which is provided by the protective structures called tailings dams. The author analyses functional features of construction and operation of tailings in a technological chain of the mining e...

Although intensification of agricultural practices is traditionally viewed as one of the quickest way of achieving food independence, the increasing demand for energy and unsustainable development of agriculture are detrimental to natural habitats and decrease biological diversity. Organic farming offers a viable alternative and has the potential to facilitate the gradual expansion of environmentally friendly technologies. By carrying out the analysis of statistical data on the value of organic production obtained...

GNSS technology evolves at a fast pace and, along with it, the number of applications that are based on this technology increases. An important part of the applicability of GNSS technology is in the field of geodesy. In this article we propose to present a GNSS system that is built starting from the U-blox ZED-F9P receiver, integrated on a development board produced by SparkFun that is connected to the Raspberry Pi 4 Model B single-board computer. The Raspberry Pi computer and the development board made by SparkFu...

The specificity of the microelement environment in the population of individual geochemical provinces determines the features of homeostasis regulation processes. In conditions of excessive intake of strontium with drinking water, it is assumed pathological disorders of the parameters of osteometabolism with the involvement of immune regulation mechanisms. We examined 59 children of preschool age permanently residing in the territory of the strontium geochemical province and consuming drinking water with an excess...

The paper deals with an analysis of the settlement of a tank. The tank has a diameter of 18.6 m and a volume of 1760 m3. The subsoil consists of soft sandy clays and clays of low to medium plasticity. The tank has been founded on a slab of a thickness of 0.2 m. A consolidation layer of compacted gravel of a thickness of 1 m was created immediately below the foundation slab. The soft subsoil was improved using the stone columns. The stone columns were installed using vibro-replacement bottom feed technology. The st...

The article deals with the issues of a significant excess of the potential demographic load over the demographic capacity of the forests of the Cheboksary city district. Some ways of solving this problem are proposed.

The study aims to assess the diversity, density, and heterogeneity of seafloor litter, distributed in the Bulgarian Black Sea’s shelf area. The indicators for assessment follow the national monitoring program under Descriptor D10 of the Marine Strategy Framework Directive. The survey campaign took place between 19.10 – 14.11.2017. Marine debris was gathered by 53 trawl hauls distributed in four regions at depths between 30 and 100m. During the survey, all litter items were collected and classified into seven categ...

If the place hydrogeological conditions are uniform (invariable aquifer transmissivity, no impact of hydrogeological network) then the quarry depression cone and the pumping rate for the quarry draining can be obtained by using analytical methods. The dolomite aquifer at the Iecava district in Latvia included large impervious areas. Due to this fact, appliance of analytical methods cannot give the right depression cone. The local hydrogeological model (HM) was applied for obtaining the depression cone of the dolom...

Processing of satellite data with high and very high spatial resolution enables to monitor selected social activities in open land, such as the occurrence and movement of people, cars, ships and other transport means. Such information is important for mass event control, urban and transport planning, intelligent transport systems, emergency, epidemiologic control, military application etc. The pilot area is located in Prague, close to the Old Town Square. Panchromatic and multispectral imagery from WorldView3 was ...

The determination and modelling of the territory is common scientific instrument for presentation of the state of the nature and human systems. The present research is based on the morphological and hydrological peculiarities in the river catchment. It observed of the Danube coastal zone in Bulgaria sector of the river. The differentiation and determination of the coastal area is key element in the process of the management of the territory and development of the regions. The general results of the research are re...

Doubtless, the application of UAV is a new iteration of remote sensing technologies applied for obtaining information about the object of investigation. An opportunity of fast data acquisition for a large area of research provides to reduce the costs and expand the scope of application. One cannot deny that this approach is actual for geophysical methods of investigation, for aeromagnetic exploration particularly [[1]]. One should note here that process of adaptation of magnetometer sensors for UAV gets a new requ...

Mining is a very heavy industry. Every day miners take incredible risks to extract valuable ores and minerals from the earth's crust. In order to ensure the safe operation of the underground, adequate ventilation is required to ensure that the workplaces are permanently supplied with fresh air. By combining general ventilation with kilometers of secondary ventilation specific ventilation pipes, mining ventilation is a special area where errors can occur. Modeling and simulation of mining ventilation networks have ...

In the North Bohemian region in the Most Basin, brown coal quarries are gradually completed and subsequently closed at present time. The planned and implemented process of reclamation of the area affected by surface mining of brown coal consists in the creation of artificial lakes and afforestation of their surroundings. The Most Basin has a character of a graben, especially its central part. The area of the basin is closed between the Ore Mountains and the Bohemian Central Mountains. In a relation with this ortho...

The only one natural gas storage in Bulgaria - Underground Gas Storage Chiren requires modernization and development. A set of activities have been planned and implemented, covering research, technological and production activities. An overriding task and a top priority are to increase capacities - in volume and productivity of the storage. The aim of the research is to determine the necessary modern set of knowledge that will draw the attention of stakeholders to the possibility of modernization and increase the ...

The data obtained from the monitoring of the dam’s behavior, allow to make the decisions to start the current maintenance works at the best moments of time. They also make it possible to know from early stages possible atypical behavioral phenomena and to take measures accordingly before such phenomena become dangerous for the safety of the construction. One of the ways to monitor constructions is to perform geodetic measurements at different stages and to compare the coordinates obtained in a coordinate reference...

The article is devoted to the problem of cleaning and disposal of waste from mining enterprises of the Russian Federation, using the example of the production of alumina (aluminum oxide). The problem associated with the efficient use of industrial waste as sorbents for the purification of wastewater from mining enterprises is considered. A method is proposed that meets the requirements of the purification efficiency in terms of environmental and economic parameters. The substantiation and proof of the expediency o...

The subject of this study is the development of a web-based system for real time data tracking and applying GNSS corrections in GIS environment. This includes the data structures specification in a geospatial database, obtaining a methodology for system realization and discussing the results with an accent to the accuracy of the corrected GNSS positions. The system for tracking and applying GNSS corrections in GIS environment is entirely built by using free and open source software and has web-based interface. The...

This work is a logical conclusion and generalization of results of two-year researchoriented to design the integrated technology of processing of diopside-containing ores towin the scandium compounds and get the wide spectrum of large-capacity products. Thetraditional technology of sulfuric uncovering of mineral raw materials is applied withinthe scope of this work. The technology of scandium compounds extraction with the useof impregnators, which are based on the macroporous carbons soaked with diethylhexylphosph...

The Brown Coal Research Institute j.s.c. is currently conducting long-term research on the development of the Czech Republic’s climate and its impacts on mining activities. The research deals with the overall assessment of climate change in the Czech Republic and the main attention is paid to the area of the Most Basin, which is known as the largest Czech brown coal deposit. In addition, the basic air pollution characteristics in this area are monitored for a long time and trends in relation to climate change are ...

The effectiveness of the public administration system depends on the level of professional performance of civil servants and the quality of implementation of government decisions. At the present stage, the world is at the stage of transformation of public administration institutions due to the development of digital technologies, which are a key factor determining the rate of economic growth and play a decisive role in increasing the competitiveness of the state. The introduction of digital technologies expands th...

Today the concept of e-commerce has become commonly used, and e-commerce has become an integral part of commercial transactions. An increase in the number of global Internet users is the driver of increase in the number of e-commerce transactions. The introduction and role of e-commerce is not well-understood by any manager of a small and medium enterprise. It takes time and money to introduce e-commerce in business, especially in retailing. Enterprise managers need a clear e-commerce introduction strategy to see ...

The oceans cover more than 70% of the Earth's surface. There is a constant material andenergetic interaction of the ocean with the environment. This process determines themodification of the basic properties of its waters, which, in turn, determines the climatechange on Earth. Climate change remains today one of the most discussed issues in bothacademia and the public. The Intergovernmental Oceanographic Commission ofUNESCO responsible for supporting global ocean science and services pays greatattention to the imp...

Proposed within the framework of the conducted study were options for producing the titanium trichloride, a precursor for the synthesis of titanium dioxide nanoparticles to produce dye-sensitized solar cells (DSSC). Optimal concentrations of the initial titanium tetrachloride solution were identified, which have a major effect on the reduction process and the stability of resulting titanium trichloride solutions. Possible synthesis and destruction mechanisms of the titanium trichloride under the influence of vario...

Modern professional geographic information systems (GIS) include a wide range of well-tuned powerful algorithms for processing and analyzing spatial data, but their use is hampered by the specifics of the information environment in which the GIS data operate. At the same time, web technologies can provide an information environment that will allow users to access GIS software from anywhere in the world. The integration of GIS and web technologies provides greater opportunities for collecting, accumulating and proc...

Increasing the number of cars in urban areas and the development of a variety of production technologies involving the use of fossil fuels in the urban environment are leading to a significant increase in air pollution. As air pollution with heavy metals and other chemical elements increases, air quality is deteriorating. Poor air quality, in turn, causes a number of different problems for human health, causes poor feeling and reduces life quality in total. The method of analysis of snow samples is one of the meth...

In absence of core samples and open-hole well-log data, the broken bits of rock removed from the borehole during the drilling process represent in many cases the only lithological data that is recovered from a well. The main objective of this study was to build up a lithological profile and to use the data in order to improve the knowledge about the local geology (Quaternary deposits). Lithological information at shallow depth is generally used to better understand the local site effects, known to play an importan...

A comprehensive study of composites using traditional methods of testing mechanical properties in combination with methods of digital optical and scanning atomic force microscopy made it possible to establish stable correlations between the content of chromium diboride CrB2 additive with an average grain size WC, microstructure parameters, hardness, fracture toughness, ultimate strength at bending and compression. The optimal ratios of the components of the WC–Co-CrB2 system have been established, at which a finel...

Peptide-drug conjugates are therapeutic agents that combine one or more drug molecules with a peptide through a biodegradable linker. Even if the peptides used in synthesis of such conjugates have a smaller pharmacological action than the small molecule of organic drug, they easily penetrate the membranes and then bind to receptors. Peptide-drug conjugates are used in various fields, such as: (i) anticancer therapy; (ii) antimicrobial application; (iii) anti-inflammatory application. In the last decades, researche...

Surface mining method enormously affects the environment in terms of fugitive dust emission than underground mining method. High mechanization in mining operations leads to add heavy load of dust to the surrounding area. Dust not only deteriorates the environmental air quality in and around the mining site but also creates serious health hazards. During coal mining activities, large quantities of coal dust, ashes, polycyclic aromatic hydrocarbons, and heavy metals are released into the environment, forming a compl...

Landsliding is among the most massive and active exogenous processes. Now they increasingly manifest in permafrost zones due to climate change and require close attention and careful study. Analysis of the territory most prone to these processes, one of the largest islands in Northern Canada, Banks, confirmed earlier studies of landslide processes in this zone, which indicate a relationship between increased activation of landslides and abnormally warm summers. The study and assessment of the landslide focus param...

Climatic changes are recorded across the globe. Within the cryolitic zone, in the area of insular permafrost and permanent snow patches, the relevance of soil temperature measuring lies in recording changes of perennially frozen rocks and dynamics of seasonal soil freezing. These indicators are important for understanding changes in environmental parameters, landscape changes in the boreal zone, and the impact of changes on human economic activities, including the oil and gas industry. The present studies of the s...

The article considers the problem of predictive estimation of deformation processes of geotechnical control objects. It is noted that the main task of geotechnical monitoring is the rapid identification and geodynamic forecasting of geological processes that may affect the safe state of life-supporting and man-made objects, in order to timely develop and take measures to prevent and eliminate emergency situations. One of the most effective ways to timely predict the beginning and activation of deformation processe...

Records of the magnetometers responding to the effects of big earthquakes were noticed more than a hundred years ago. Even then began to dispute what caused these effects: mechanical vibrations of instruments or electric or magnetic oscillations generated by the earthquakes. In Panagjurishte (PAG) observatory we have great opportunity to shed light on this issue because we have four important instruments installed on the site - three different types of magnetometers and one seismometer. Three large earthquakes wit...

Global seismic risk and vulnerability to earthquakes are increasing steadily as urbanization and development occupy more areas that a prone to effects of strong earthquakes. The assessment of seismic hazard and generation of earthquake scenarios is the first link in the prevention chain and the first step in the evaluation of the seismic risk. The territory of Bulgaria represents a typical example of high seismic risk area in the eastern part of the Balkan Peninsula. Over the centuries, Bulgaria has experienced st...

Ecoethics and its various forms are an important phenomenon today. The bad ecological situation and the threat of the ecological collapse of the planet have been the subject of reflection by many theorists. These include multidisciplinary scientists, philosophers and ethicists. In our paper, we focus on the parallel presentation of different approaches by theorists from different industries. We present the biologization of economics, Heidegger's reflection of man's predatory relationship to the present, Ehrlich's ...

In Eastern Europe, Batumi is one of the dynamically increasing touristic center, development of recreational economy where creates some particular ecological issues. The urgency of the matter is also increased by the fact that ecological condition of recreational zone of city sea coast is developed with worsening tendency due to increased touristic flow and anthropogenic load. The main aim of research is to study the mechanism worsening the ecological condition of sea coast`s recreational zone, find out the geogra...

Zaporizhzhia oblast is located in the steppe zone of Ukraine with a characteristic flat landscape dominated by chernozem soils (70% of the area), 10% of the area – chestnut and dark chestnut soils (south and southwest), which are characterized by some salinity, especially in the coastal part. This area is characterized by significant diversity of soil conditions. Excessive plowing of the territory (about 85%) worsens the ecological conditions and opportunities for self-regulation of the agro-landscape, reduces the...

The article actualizes environmental issues, which are significantly influenced by the process of informatization of man and society, which unfolds not only as an increase and accumulation of information, but as a search for new ways to organize activities and determine the means of its implementation. It is determined that the construction of innovative models of creation of philosophical and ecological knowledge is not properly reflected in the global information network. To develop new information and humanitar...

With this article, the author will try to outline the relationship between environmental urbanism, the urban economy and policies to build sustainable cities of the future. Given that worldwide attention is being paid to the problems of climate change, which go hand in hand with the creation of sustainable architecture, which uses green technologies to build a modern city, where the application of the environmental approach is seen as a means of healing and planning the modern city of the future. The emerging tren...

The problem of the environment is becoming more and more pressing. The economic evolution of the world has led on the one hand to wellbeing, but on the other hand, has not taken into account Natural Resources. Sustainable development is on the agenda of all countries and represents a challenge for a return to green values. The European Union has sustainable development as one of its priorities. However, all this is not possible without proper education. The EU and national governments have set clear targets to gui...

Soil and groundwater resources are natural resources of high ecological value, their protection against chemical degradation and pollution being of major interest and requesting a new methodology based on risk instruments. The need to implement methods for qualitative and quantitative assessment of ecotoxicological risk resides in objective assessment of effects pollutants have on ecosystems, to limit the transfer of xenobiotics to lower and upper levels of the food chain. In this sense, the team of the Environmen...

The carbon fiber composite plate is finding their increasing importance as structural material in civil building, construction equipment, aviation and marine applications. Most often, reinforced concrete structures are strengthened due to internal reinforcement corrosion, freeze-thaw action or weak original design. The carbon fibers composite plate is used in strengthen and to improve the structure's load-bearing capacity, stiffness, and service life. But despite the good reinforcing properties of composite materi...