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The article considers the solving the problem arising at the mathematical modeling of hydrological processes, namely, the problem of the number of phase variables taken into account in the model. The number of variables in the model can change depending on the climate. The fractal dimension characterizes required number of variables. In the article the results of applying the established regularity of the influence of the long-term norm of surface air temperature on the fractal dimensionality of the annual runoff ...

In the mountain zone, the slope exposure plays important role in the process of soil formation. The aim of the work was to assess the impact of slope exposure on the soil properties of agricultural terraces in the Eastern Caucasus. A study of soil properties of agricultural terraces in the mountainous zone of the Eastern Caucasus (Dagestan, Russian Federation) was carried out. The purpose of the study was to compare the soils of agricultural terraces on the slopes of the northern and southern exposure. The content...

The present study has been dedicated on the removal process of heavy metal ions from electrolyte solutions by using methods of electroflotation and subsequent filtration in a multi-component system with the presence of various surfactants of different nature. The research was conducted in a five-component system comprising ions of iron (II), nickel (II), copper (II), plumbum (II), and zinc (II) (the total concentration of metal ions is 200 mg/l). The research was conducted in a highly concentrated electrolyte solu...

In the last decades in Romanian forests, a massive phenomenon of uncontrolled cut trees was observed, leading to a new environmental problem. In these conditions, the solar radiation affects the seedlings of some tree species as the beech and oak, and generally the entire life from these forests. In the last 5-6 years, a supplementary massive invasion of the white mistletoe was observed, especially associated with the silver fir and beech. The main objective of this paper is to associate the effects of the solar r...

The purpose of this report is to show possible ways to improve the information access for societies in developing countries possessing significant mineral reserves and mining industries, which considerably affect the welfare of national economies and population. The research methodology is based on the provisions of official regulatory documents, methods for processing and analyzing statistical data related to the subject of the research, demonstration of the results characterizing the state and dynamics of the in...

The identification technique of hazardous clouds using infrared spectrometry is based on the spectral analysis of electromagnetic radiation that is absorbed and emitted by the molecules of a gas cloud. Molecules can be identified by analyzing the location of lines inside the spectrum, representing the energy differences between the cases involved and the strength of the lines, which is the probability of a photon being absorbed or emitted. This method is often called passive infrared spectrometry because no artifi...

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...

In the current context, in which the analysis of the failures by infrared thermography for the hydraulically operated machines is an increasingly widespread internationally method, starting from the year 2016, in Romania, at INOE 2000 - IHP Bucharest the first thermographic analyzes were laid made on hydraulic equipment. It is known that by maintaining normal limits of variation of the temperature and viscosity of the hydraulic oil in the actuation plants, are created the conditions of the productivity increase an...

The purpose of this study was to separate and subsequently investigate the lake governance developments within existing surface water resource governance system in Latvia by looking across all the three country administration levels, namely of the national, regional and municipal levels, in order to determine the actual state and main drawbacks of this step-wise developing lake governance system in Latvian. In this study, lake governance was systemized and characterized, taking note of what particular and eventual...

The research papers for the present study were carried out in the 2018-2019 period in the river basin of the Muscel stream, a tributary of the Dambovita river, in Romania, using the empirical method of weighted overlay of thematic maps and GIS, resulting the hazard maps considering landslides which occurred on the scale of the studied drainage area. For the application of the research method, the necessary data regarding the digital terrain model, the land cover with vegetation and the degree of urbanization, were...

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 article shows the stages of creating an interactive map of tourist resources of the Akmola region by using Web-technology. The main tourist resources of the region and methods for their assessment were determined. The tourist resources of the region are represented by natural (geological and geomorphological, climatic, hydrological, botanical), cultural and historical, also socio-economic resources. Evaluation of geological resources was carried out by using the cartographic method (the cartograms mode). To as...

Through this work we have created two geodesic support networks of the V order in the peat area of Poiana Stampei commune, supporting the subsequent topographic elevations of both the railway and its auxiliary elements, as well as the adjacent areas, be they forest boundaries, fences, etc. .a .. After materializing and making observations, it is necessary to compensate the networks to obtain the final coordinates of the points that will serve the subsequent topographic surveys and the topographic plans. In order t...

Alzheimer?s disease, the most common age-related dementia worldwide, is characterized by two pathologies: deposition of ?-amyloid plaque and neurofibrillary tangles of hyperphosphorylated tau. To this date, several factors, such as oxidative stress, metal ions, or genetic factors are associated with Alzheimer`s diseases, but there are still some question marks regarding: (i) how the misfolding and aggregation of A? occurs and which is the aggregation mechanism; (ii) how the metal ions binds to A? and how they init...

The purpose of this paper is to determine the rate of methane (explosive gas ) and of carbon dioxide (axphysants gas ) in the mine workings of Praid salt mine. Currently in Romania there are six salt mines which exploit the salt through underground mine workings: Praid salt mine, Tg. Ocna salt mine, Slanic Prahova salt mine, Ocnele Mari salt mine, Cacica salt mine, and Dej salt mine. Of these six, in three salt mines occurred gas and salt eruptions: Praid salt mine, Slanic Prahova salt mine and Tg. Ocna salt mine....

Currently there are many spatial structures for storing information about raster and vector maps. There are many algorithms for calculating map information, each of which is applicable to a specific industry. Now there is a problem of the lack of a universal algorithm for obtaining information about the maps, which will allow you to store its scale, time of image creation, deformation, various rotations and other topological features of objects in the images. The article sets the task of developing a method for ex...

The article presents a novel research project aimed at analysis of historical processes at memorable places of the Tambov region associated with prominent Russian personalities using original technologies for analysis, data processing and creation of virtual reconstructions of cultural and historical heritage. It includes: development of the technology for creating 3D models of cultural heritage objects for virtual reconstruction of historically significant territories; development of the technology for analysis o...

In this study on speaking about minerals, we can use the elements from them in high-tech technology in everyday life. The pegmatites are surrounded by gneiss with muscovite, garnets, staurolite; mica schists with garnets, staurolite, kyanite; and amphibolites. In the Con?u area pegmatites appear in tabular veins form, or irregular lenses, arranged by accordance with mica schists of the host metamorphic rocks. The pegmatites veins have a thickness that varies between 2 and 10 meters in the central area and developm...

The paper presents a synthesis of our researches on the main physic - chemical and biological parameters of the Snagov Lake, from Ilfov County, Romania, made since 2013 until 2019. We have developed complex investigations on the most important water quality parameters of the lake, in the purpose of analyze the evolution of the water eutrophication phenomenon in time, in different sampling points, also to establish the optimal methods of control and combat of the studied pollution process. Because the eutrophicatio...

In more than ten years of research in the field of carbon capture and storage (CCS) in Romania, several regions have been highlighted for their potential to contribute to the implementation of the technology in the country. Their delimitation has been made around large industrial stationary sources where promising storage and utilization options were available, considering favorable transport routes and small transport distances. The most promising and most studied regions for Romania are Oltenia and Galati. Olten...

Transport is part of our lives. We live in an accelerated time and this also affects our transport demands. We need to move from one place to another faster. People often use own cars to move faster. The individual automobile transport has advantages. I tis flexible, fast and comfortable. But the automobile transport disadvantages. Many cars cause traffic jams, have a negative impact on the environment and the public roads are load. Individual car transport competes with public transport. In our country the public...

Nanoparticles, due to small size and capacity to remain in suspension, are very efficient to remediate aquifers contaminated. However, due to their small size, while nanoparticles are traveling through porous media, they can rapidly aggregate, causing their settling and deposition. These phenomena produce issues for in situ remediation, such as the loss in chemical reactivity and the unknowing about the nanoparticles distribution when they are injected in situ. Laboratory experiment has been carried out with groun...

Recently, zeolites have attracted a significant interest due to their potential use in a wide range of applications related to water treatment and environmental remediation. The chemical and thermal treatments are the most used approaches to improve the zeolites properties by enhancement of sorption properties, surface area and porosity. Chemical (2M NaCl), thermal (150 °C for 24 h) and thermo-chemical (2M NaCl, 150 °C for 24 h) activation methods for a natural clinoptilolite based zeolite originated from Romania ...

A business model consists of specific components that enable the presentation of the path and tools for creating value or its loss in the activities of enterprises. Classically, from the accounting science research point of view and in accordance with the disclosure map proposed by the International Integrated Reporting Council (IIRC), there are four main components of a business model: inputs (capitals), business activities, outputs and outcomes. The research subject presented in the paper is inputs, which includ...

To understand the natural causes of the ?global warming?, it?s necessary to know the temporal evolution of the warm and cold phases of some cosmic phenomena with a cyclical development that induced the general climate of our planet in the past. For historic times, the climatic effects of shorter cycles are manifested more than those of longer ones, which are less visible. Thus, the ?global warming? (in fact the ?Actual Climatic Optimum? - ACO) can be regarded as the last warm phase of the mini-glaciations cycle. T...

From the tourist point of view, National Park of ?Nemuna? mountins is one of the most interesting territories in Kosovo and beyond. It has the most diverse and preserved forest vegetation, with a range of endemic flora species and flora relics, which in scientific and tourist terms is very important and attractive. This of course complements the morphological and hydrographic characteristics, as well as important tourist motives. The mentioned natural resources of the ?Nemuna?mountains positively determine their r...

The digitalization of financial services at its current stage is characterized by high dynamics in terms of information technology used, with the expansion and complication of the relationship with consumers, which requires constant improvement of the forms and methods of management of organizations offering financial services. The emergence of phenomena such as cryptocurrencies, blockchain transactions, fintech companies, and others modify the financial services market, which is traditionally dominated by banks a...

Implementation of carbon capture and storage is vital for the reduction of CO2 emissions from industrial sources and for the financial survival of emitters in Romania. Although in the last two decades, a reduction of industrial emissions was seen and the emissions verified for 2019 are almost half of the emissions from 2007, the need to reduce CO2 emissions still exists on the pathway for a green economy and a green energy future. Decarbonizing industry can be made only by increasing the share of renewables in the...

Worldwide, political framework reaffirmed sustainable development as a central element of the international agenda and give a new impetus to the practical application of the global measures to combat the negative effects of human actions and for the environmental protection. Since mid 2010, petrol consumption in the transport sector has increased at a higher rate than in other sectors. The transport sector generates 35% of the total CO2 emissions. In this context, strategies have been adopted to use clean energy, ...

When we carry out inference automation, the time required to complete the inference procedure is very important. The shorter the time, the more effective the procedure. If we carry out the logical inference procedure manually, then we make a choice of a sequence of steps. In this case, the person takes into account the specifics of the problem being solved. It does not act formally, but taking into account the substantial meaning of predicates. If we are going to shift the inference procedure to a computer, then w...

It is well known that the process of inference is generally non-deterministic. Therefore, to develop effective inference algorithms, the problem of managing the inference search is very relevant. The solution to this problem is complicated by the fact that the predicate calculus is unsolvable. There is no method for establishing general validity or its absence for an arbitrary formula for calculating predicates. Nevertheless, if the formula for calculating predicates is valid, then there is a procedure for establi...

This work considers the study of libration dynamics of the planets? moons. To analysis such processes, it is necessary to use methods for investigating complex systems, as an influence from neighboring celestial bodies on spin-orbital motion of a moon should be taken into account. This fully applies to the Moon?s rotation about its axis. The construction of modern theories of the physical libration of the Moon (PLM) is based on gravimetric, seismic, satellite observations, and lunar laser ranging, which in its tur...

To address the global energy problem, energy from the solar source remains the most encouraging solution for buildings with a difficult-to-achieve goal such as achieving zero net energy consumption. In a solar thermal system, integrated solar collectors in buildings can convert the absorbed solar energy into thermal energy and can be better exploited in an area of the facade, while acting as an integral component of the building envelope, with good sun exposure. The aesthetic character and functionality of this te...

Taking into consideration limited financing of waste processing industry in Russia, refuse derived fuel production is becoming a promising course to decrease MSW landfilling at minimum cost, as the method allows safe energy recovery in existing cement kilns and precalciners. For its part, the cement industry pursues a lower level of fuel expenditure, which accounts for about 20% of total production cost. In this regard, fossil fuel substitution for fuel from waste is a mutually beneficial solution, linking the int...

Currently, many researchers around the world have been focused on applying existing natural resources beside artificial and agricultural waste in RCC mixtures for dam construction to improve the properties of the resulting concrete, produce a greener RCC, and therefore, to protect surrounding environment. The aim of this experimental study is to estimate and compare pozzolanic activity of some active mineral additives used in roller compacted concrete for dam construction by using saturated lime solution method. T...

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...

Modern industrial biotechnology considers extremophilic microorganisms and, in particular, extreme halophiles as promising producers for the bioeconomy of the future. Extremely halophilic bacteria and archaea can be used for the production of carotenoids, polyhydroxyalkanoates, polysaccharides, osmoprotectors, thermostable enzymes, photosystem proteins, and can also be sources of unique biologically active substances for medical purposes. The implementation of large-scale industrial processes with minimal requirem...

Waste is not only an environmental problem, but an economic loss because Romania recycles only a small part of municipal waste. The use of atmospheric pollutant dispersion models has become necessary due to cost-efficiency reasons, given the limitation of fixed measuring points/stations for these pollutants. The paper studies the dispersion of PM10 dust particle pollution in the landfill?s area of influence, depending on wind direction and speed. Simulations are based on measurements of suspended particles, carrie...

Soil unit weight is one of the most important parameter used in all geotechnical calculus related to design process of any type of constructions. Determination of this gravimetric -volumetric data can be done through laboratory tests in firm soils, or indirectly as itderive from some in situ investigations such as Cone Penetrations Test (CPT) or as severalgeophysical investigations such as Down hole, Cross hole, Logging P-S velocities, insoils which can?t support undisturbed samples (very wet organic soils or sand...

Renewable resources? share in meeting the power balance in Romania grew constantly during the past decade. Therefore, the contribution of polluting energy sources (such as coal or oil) has progressively reduced. Moreover, to enable environmental impact mitigation for the still operating classical plants, proper desulphurization equipment were installed. It is remarked that the shares corresponding to hydro-energy and nuclear energy show an almost constant trend. Sensible investments were made in the energy sector,...

A significant percentage of nowadays furniture is made of melamine faced chipboard. Even if the surface has a high resistance to aggressive factors, at the time of damage the commonly accepted solution is to replace the board or the entire affected assembly, even if the furniture is relatively new. Surface repair, in addition to being difficult, does not serve the interests of furniture or raw material manufacturers. The study verifies the possibility of repairing the surface of different melamine chipboard boards...

Spontaneous combustion is a phenomenon that results from the heating of combustible organic powders by slow oxidation and which occurs through the air passage (created by an air depression) through the mass of dust. The oxidation phenomenon of combustible powders represents their reaction with atmospheric oxygen resulting in products of carbon dioxide, carbon oxide, water and other gases whose content depends on the temperature at which the oxidation takes place. During oxidation, the oxidation rate is a function ...

The purpose of this paper is to study network simulation and modeling software and determine which tools are most suitable for designing a corporate computer network of commercial enterprise. The permanent improvement of automation tools, the integrated implementation of information processing and transmission systems in the enterprise structure require knowledge of all the advantages and disadvantages of new technologies to the smallest detail, the ability to use them as intended and, most importantly, effectivel...

The aim of this article is to create a risk analysis of selected school facilities which can be an auxiliary tool of security solutions against terrorism. Most terrorist attacks are focused on so-called soft targets - crowded places, which are not secure against violent attacks. Furthermore, attacks on school facilities abroad are frequent too. A wellprepared risk analysis is a necessary method to detect weaknesses and strengths of the security of a soft target. The university in Zlin in the Czech Republic was cho...

Flammable liquids in motion when is transporting by pipes, is mixing, pumping, filtering, agitating or by pouring them from one vessel to another can generate static charges even if the respective pipes or vessels are bonded and earthed. Also, loads may occur if the liquid is splashes and forms a mist inside the vessel (tank, container). Accumulation of static electricity can, under certain conditions, be discharge and ignite the explosive atmosphere. In the paper are presented some aspects regarding the technical...

The paper presents well-preserved microfaunas (foraminifers and ostracods) enclosed in cuttings samples and cores recovered by 6 hydrocarbon wells drilled in the Moesian Platform, in Silistea area, S Romania. The lithological and micropaleontological obtained data improve the stratigraphic knowledge at regional level. The analyzed samples contain foraminifera that characterize biozones extending in the Sarmatian, as follows: the middle Volhynian Varidentella reussi, the late Volhynian Elphidium reginum, the early ...

On the Lower Danube, including the Romanian-Bulgarian common sector (between chainage km 845.5 to km 375), the width of the fairway is generally sufficient to accommodate multiple ships. However, in low water conditions (below 3000 mc/s) the depths are insufficient to ensure the efficient transport of goods. Very often, vessels sailing in the critical navigation areas (bottlenecks) can only be loaded at half of their capacity. This situation can cause significant losses for river transport operators and lead to la...

The coastal retreat in touristic areas concerns many sectors along the Romanian Black Sea shore; it usually requires programmes for beach nourishment, and consequently, large amounts of proper sand are necessary to be available for such activities. In order to minimize the effort for searching offshore sand, we conducted seismo-acoustics researches and some other archived data have been used during these researches, both for planning the sea works and during the integrated interpretation of the data. The results o...

With the current worldwide trend of increasing individual car traffic in the urban road network, sustainable transport has become one of the key issues for the sustainable future of transport in cities. In fact, most of the journeys in the urban area are on shorter distances where we can substitute the car very easily. The contribution deals with the current state, after two months from the first appearance of shared e-scooters in the capital of Slovakia - Bratislava. We analysed the shared e-scooters from a mobil...

Sustainability is a criterion defined since the 1980s, essential in all areas of activity, without which development cannot be acheived. Thermal insulation mattresses produced using sheep wool, successfully meet the conditions imposed by this criterion. This type of building material ensures the responsible use of non-renewable natural resources, the possibility of reuse and recycling of materials, contributes to environmental protection and pollution reduction, energy saving and provides a hygienic and healthy li...