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In the case of the production of many metal products, some processing technologies are associated with outdated methods of processing. These methods often require consumption of energy and water, sometimes they cause environmental pollution. Non-durable products generate waste. Often surface changes of materials, such as corrosion, may also generate emissions of harmful substances into the atmosphere. The article describes the laser treatment, which is now a modern way to fulfil many technological operations. By t...

Global deterioration of surface water quality was attributed to a pair of factors: human activities and natural processes, including hydrological variability, climate change, weather characteristics, and adjacent land use. The study of water quality in the contemporary era is a current issue. This paper presents an analysis of the variability of water quality parameters in a study developed on 4 years. In a number of 5 monitoring points, 18 water status parameters were monitored. Primary statistic methods were use...

The article deals with numerical analysis of oedometer tests and high-rise building in conditions of Bratislava focused on time development of settlement. Numerical calculations are processed in finite element geotechnical software Plaxis. Oedometer tests was modelled in first step, with using six material models (Linear elastic, Mohr-Coulomb, Hardening Soil, Modified Cam Clay, Soft Soil, and Soft Soil Creep). Oedometer tests was realized on samples with four different moisture. There was achieved the effect of so...

For processing observations of the terrestrial pole dynamics, the regression dynamic modeling (RDM) approach was used. With the RDM software package the models describing the dynamics of the terrestrial polar coordinates were built. This approach provides accurate combined models of observations which describe to some extent causal and deterministic communication and provide forecast of characteristics. A comparison of observations and predicted values of the terrestrial polar coordinates obtained with the RDM app...

The issue of renewable energy represents an extremely important topic, both as regards Romania, as well as at a worldwide level. From this perspective, this work presents an analysis tool for the investment opportunities in this sector. On the other hand, it tends to clarify some issues related to the concept of renewable energy. From this perspective, the objective of this paper is to conduct a study through which an analysis will be presented related to the wind action on the wind turbines located in the Fantane...

Because of the limited resources of water and increasing demand for it, solutions for wastewater recycling and reuse have become of great interest. Wastewater can be recycled for the same purpose or can be reused for other purpose, but first it must to be treated. In this paper some scenarios of using Sequential Batch Reactors treatment of wastewater were investigated with the purpose of reusing or recycling in small-sized residences like chalets or guest houses. Simulations were done using BioWin, which is a powe...

Copernicus is a European Union programme designed to provide a service in delivering free, openly accessible data about the Earth?s surface through satellite and in-situ observations. On the other hand, Landsat represents the world?s longest standing continuously acquired collection of space-based, moderate-resolution, land remote sensing data for those working in agriculture, geology, forestry, regional planning, education, mapping, and global change research. Although the images of these satellite systems are ch...

This paper presents the analysis of quantities and types of waste delivered to port reception facilities by passenger-cargo ferries at the Port of ?winouj?cie. The waste classification set out by applicable legal provisions, statistics on the numbers and sizes of vessels delivering waste to the port and journey frequencies of the vessels under review have been used, along with other inputs, for the purposes of this study. The objective of this paper has been to conduct an analysis of quantities and types of waste ...

Restructuring of mining activity in Romania resulted in active implementation of reconstruction programs, upgrading and modernization of the mines in the Jiu Valley. These programs were aimed mainly at increasing labor productivity safely. Considering, along with requirements for ensuring a safe and healthy working environment, also the issues related to the drained methane valorization and to environmental protection restrictions it was imposed to rethink the so-called "global methane treatment" at the level of m...

Nowadays, wearable devices represent an intensely-used technology, which helps us keep track of various vital parameters. It is a great development, its impact on society being described simply by the success among users. The data provided by wearable devices can be easily integrated with wireless sensor networks, leading to successful Internet-of-Things applications. The purpose of this paper is to analyze the current stage of wearable technology, as it represents fast and simple data sharing. These make it is es...

Work safety in hard coal mines is implemented based on Geological and Mining Law. It imposes an obligation on the entrepreneur to identify hazards related to activities of the mine and to undertake actions aimed at preventing and removing these threats and hazards. The owner is required to assess the risk and propose solutions necessary to minimize it. These activities must cover all activities performed during the production process and the operation of all types of equipment, including mining machines. The most ...

The European Directive 31/2010 for the energy performance of buildings imposed two distinct deadlines for the new buildings stock, one being that all public buildings must be nearly Zero Energy Buildings (nZEB) starting with 31 December 2018 and the other is that all new buildings must be nZEB starting from 31 December 2020. Thus, a thoroughly design must be considered in obtaining such low energy consumptions at buildings. In the design stage, a time consuming activity is that of modeling and simulating thermal w...

Rice is an important source of nutrition as well as food supplies for massive food industry, retail, home consumption, animal feedstock and other uses. The quality of the grown agricultural foods is fragile and dependent on many external and internal factors, e.g., influenced by environmental factors of which one of the most important is mineral nutrition via fertilizers, natural soil structure, texture and mineral contents, micro- and micrometeorological, hidrological factors. The aim of this study is to evaluate...

The estimation of groundwater levels in a basin is a very important factor for planning integrated management of groundwater and surface water resources. In this study, artificial neural network models have been developed for predicting and forecasting of groundwater level. The reliability of the computational models was analyzed based on simulation results and using three statistical tests including Pearson correlation coefficient, coefficient of determination and root-mean-square error. The artificial neural net...

Accurate prediction of reference evapotranspiration (ET0) is essential in water resources planning and management of irrigation systems. The ET0was determinate using the FAO-56 Penman-Monteith equation based on the weather data collected in Serbia during the period 1980-2010. The purpose of this research is to develop and apply the Extreme Learning Machine (ELM) to estimate and calculate the ET0. The process was implemented for eight input combinations in order to find the most optimal input combination for ET0 pr...

The most ancient Late Paleozoic flora of the Verkhoyansk is known only on the western slope of the Orulgan Range, where relatively abundant complex of the Early-Middle Carboniferous vegetative remains was identified in the Bylykat Formation by N.A. Shvedov in sixties of the last century. The Bylykat Formation was defined as the lowest stratigraphic unit of the Verkhoyansk terrigenous complex, exposed in the core of the Orulgan anticlinorium [8]. Volume, division into subformations and stage belonging of this predo...

There are several hundreds of stone circles known in the northern Europe. Most of them were created during the time period from the late Stone Age until Middle Ages. However, their historical significance has been studied and evaluated only in a small number of cases. More often these stone circles are considered as peculiar nature formations, connected with the local folklore. The stone circles locate in the northern part of Poland were mainly studied since the beginning of the last century and the time of their ...

Dill (Anethum graveolens), a condimentary and aromatic plant belonging to the Apiaceae family is widely used in the food industry due to its preservative and functional properties. Current study aimed to obtain ethanolic extracts of Anethum graveolens (seeds and fresh leaves) and to investigate these plant parts for their antioxidant activity (AA), total phenolics content (TPC) and profile of individual polyphenols, including: caffeic, ferulic, coumaric, rosmarinic, gallic, protocatechuic acids, rutin, resveratrol...

Dill (Anethum graveolens), a condimentary and aromatic plant belonging to the Apiaceae family is widely used in the food industry due to its preservative and functional properties. Current study aimed to obtain ethanolic extracts of Anethum graveolens (seeds and fresh leaves) and to investigate these plant parts for their antioxidant activity (AA), total phenolics content (TPC) and profile of individual polyphenols, including: caffeic, ferulic, coumaric, rosmarinic, gallic, protocatechuic acids, rutin, resveratrol...

The load forecasting problem is very important for every distribution system operator. The network evolution, associated behavior, related policies, etc. are correlated with this subject. Thepaper is focusing on monthly load curves forecasting. Artificial intelligence based methods such as artificial neural networks and also conventional methods are appliedin order to perform the forecast. A comparison is accomplished in order to provide thebest approach. To achieve this goal several indices have been computed and...

The article discusses the features of formation and distribution of groundwater in the north-western slope of the Moscow artesian basin in the European part of Russia. Location of the north-western slope area is based on ecological-hydrogeological zoning. The aim of the case study is to examine the anthropogenic impact on groundwater resources and quality for two main aquifer systems of the Moscow artesian basin: Gdov aquifer and Intermorainal aquifer system. The investigation based on analysis of groundwater moni...

The report presents the results of experiments on corrosion resistant in amine environments. One of the methods of protection against corrosion damage of materials was the thermal spraying of the company 'MetallSpray'. In order to evaluate the effectiveness of the protective properties of the 'MetallSpray' spraying, it has been decided to test for corrosion / erosion resistance with corrosion sputtering coupons. On the surface of the corrosion-proof coupon D888 with the MetallSpray spraying, made using the 2017 te...

This work focuses on the extraction, the physic-chemical characterization, chromatographic analysis and the study of biological activities antimicrobial and anti-inflammatory pumpkin seeds Cucurbita moschata family Cucurbitaceae. Harvested area Lakhdaria in Bouira. The extraction of fatty substance by two methods with cold maceration and Soxhlet, it gives the best yield (41.61 %), the study of physic-chemical parameters has a refractive index (1.48), acid value (0.56 %) and iodine (180.6 g\100 g). And chromatograp...

The purpose of the paper is to obtain a new composite material based on chemically functionalized nanoparticles dispersed in plastomer matrix. The dispersion of the TiO2 hybrid nanoparticles (filler) in a plastomer matrix (polyvinyl chloride-PVC) leads to a high-performance polymeric material with multi-functional, antibacterial, and plastomer-specific processing properties. The materials are suitable for biomedical and food industry applications and will be tested in terms of long-term stability, and antimicrobia...

Blast furnace slag (BFS) is used for preparation of common cements, sulfate-resisting and chemical-resisting cements and cement mortars. Using BFS as a concrete or mortar addition results in several advantageous properties such as high resistance to acid attack (sulphuric, nitric acids), low chloride permeability, high durability and low capillary porosity. Because of these properties using BFS in cement composites can decrease the effect of biodegradation induced by various microorganisms. Bio-corrosion is caused...

The production of food waste covers all the food life cycle: from agriculture, up to industrial manufacturing and processing, retail and household consumption. Increasingly, industrial ecology concepts such as cradle to cradle and circular economy are considered leading principle for eco-innovation, aiming at ?zero waste economy? in which waste is used as raw material for new products and applications. The large amount of waste produced by the food industry, in addition to being a great loss of valuable materials,...

The production of food waste covers all the food life cycle: from agriculture, up to industrial manufacturing and processing, retail and household consumption. Increasingly, industrial ecology concepts such as cradle to cradle and circular economy are considered leading principle for eco-innovation, aiming at ?zero waste economy? in which waste is used as raw material for new products and applications. The large amount of waste produced by the food industry, in addition to being a great loss of valuable materials,...

The complex valorization of marine algae biomass is an important resource for many industries like pharmaceuticals and cosmeceuticals, as raw material for the extraction of bioactive principles (vitamins, pigments, sterols and collagen), cosmetics, biofertilizers and wastewater treatment. In the last years a special attention has been given to the use of macroalgae in the pharmaceuticals and dermato-cosmetics field. Algal growth is due to the amount of nutrients available in the marine environment. The aim of this...

The complex valorization of marine algae biomass is an important resource for many industries like pharmaceuticals and cosmeceuticals, as raw material for the extraction of bioactive principles (vitamins, pigments, sterols and collagen), cosmetics, biofertilizers and wastewater treatment. In the last years a special attention has been given to the use of macroalgae in the pharmaceuticals and dermato-cosmetics field. Algal growth is due to the amount of nutrients available in the marine environment. The aim of this...

The paper focuses on the results of mathematical modeling aimed to prove the possibility of application aluminum casing for Pulse Neutron Logging (PNL) tool. The simulation was carried out by the Monte Carlo method. A number of time decays for aluminum and steel cased PNL apparatus were calculated for carbonate rocks with different porosity. The model is represented by a rock with a 216 mm diameter well. 146 mm diameter steel column is cased in the well and has filled with fresh water inside. The PNL device is loc...

Neural network method is used to solve complex modeling problems such as classification, estimation and pattern recognition. There are two main categories of ANNs which can be applied whether in regression or classification: the supervised and the unsupervised. In supervised model, all the data is labeled and the network is learned to predict the output values from the input data as previous experimental. In unsupervised model, all the data is unlabeled and the network is learned to inherent structure from the inp...

The paper deals with the problem of the influence of non-normative errors on the process of induction soldering of space vehicles waveguide paths. The application of the method of neural network modeling is proposed to solve the problem posed, which is a problem of classifying the errors of measuring instruments. As a tool, Deductor Academic software is used, which allows to conduct a wide range of analytical studies. The work presents the development of the structure of an artificial neural network for the classi...

The exploitation of petroleum deposits in Romania within the ?icleni Petroleum Structure is based on the technological process consisting of drilling for exploration (exploration wells) or for extraction (extraction wells) in three phases. As a consequence of the direct or indirect discharge of crude oil and salted water, the quality of the soil and of the groundwater is affected by petroleum hydrocarbons, chlorides, gases and other organic compounds. Biodegradation is an effective method for decontamination of so...

The article is devoted to the consideration of environmental and social factors in the management of territories and enterprises. Such consideration is crucial for the sustainable development of the territories. The authors use cognitive modeling as a tool. Building a model of the system in the form of a weighted oriented graph allows to take into account factors of different nature in complex interaction. Information for building a model can be obtained from a baseline environmental assessment or an economic and ...

The basic idea of conjugate physics-mathematical modeling is a direct transition from the PC to the industrial realization. This promise can be partially implemented by pairing of qualitative and quantitative assessments of the physical and mathematical images. Article systematized and summarized the main provisions and results of our works on this subject. Quality modelling allows to use the law of conservation, de facto directly for microsystems, as well as for macrosystems, being, its type, construction scaffol...

One of the certificates that characterizes ecological landscape changeability is fractal dimension. According to Environmental Protection Agency, the dynamics and vectors of those changes can be determined in three-dimensional space where fractal dimension makes one of the axes. Entropy can be regarded as another measurement of changeability (chaos). Application of such measurement of landscape changeability as comparative patterns of land cover is the subject matter of the paper. A fragment of a vertical color ph...

Parameters of local scours in an unprotected part of the riverbed behind the hydrosystem end structures are determined by distribution of kinematic characteristics of the flow. The kinematic characteristics in cross-sections of a natural part of the riverbed depend on a number of factors, including the bottom roughness, flow depth and water surface slope. To calculate the velocity distribution over the cross-section of the drainage channel, we used Navier?Stokes equations for the uniform steady turbulent motion. W...

The precipitation survey by modern techniques helps calculate the amount of rainfall in the catchment and save it in a digital format. This paper proposes the development of a GIS methodology for determining the input data or parameters needed for modelling the rain-drainage process in order to anticipate the amount of available leakage water and the integration of slopes leakage to estimate the magnitude of rapid floods that may occur. The data obtained from the rain-gauge stations in the Uz catchment are used in...

Lazy Bledowskie well field located in the area of the Upper Silesia, was established in 1959. It consisted of max. 22 wells abstracting water from the Triassic carbonate aquifer (Olkusz-Zawiercie major aquifer). This aquifer is additionally heavily drained by Zn-Pb ore mines. Due to the decreasing demand for water and the deterioration of its quality, wells were gradually excluded from operation and liquidated. Currently, only 2 wells are exploited, pumping approx. 11500 m3 /d. As a result of the overlapping impac...

The Ogosta Valley downstream the town of Chiprovtsi, NW Bulgaria, was subject to long-lasting contamination with arsenic and other toxic elements due to mining and ore-processing activities in the second half of the last century. Although the exploitation of lead-silver and iron ores was ceased in the end of the 90`s, the soil in particular sections of the Ogosta?s river floodplain remained highly contaminated with arsenic, lead and other heavy metals. Arsenic mobilization and transport in the vadose zone is highl...

Machine learning covers a wide set of supervised and unsupervised algorithms for solving prediction, classification and anomaly detection problems. One of the areas of their applications is for customer churn prediction. To build a model for predicting the switching of customers, data scientists use different demographics, social, transactional, behavioural metrics and features. At the same time, most of the small Bulgarian companies still don?t have the needed versatile and complete customer data. They rely mainl...

Earthen levees are commonly used protective structures against seasonal flood activity. Monitoring of the embankments condition is an important issue related to the protection of people's lives, their property, environment and infrastructure. The assessment of the physical condition of the levee can be obtained by comparison of the sensors measurements? localized within the embankment and the changes in parameters values obtained as a result of numerical modelling of flooding process. Uncertainty of the values of ...

Medical materials based on natural polysaccharides can be used as hemostatic sorbents and dressings. In this work, some samples of sponges had been obtained based on sodium alginate and chitosan. The concentration of sodium alginate in the solution, the ratio of alginate and chitosan were varied during an experiment. Polysaccharide cross-linking was carried out by inotropic gelation or by combining ionotropic gelation with ionic substitution. According to the literature, a chitosan have antibacterial properties ag...

Medical materials based on natural polysaccharides can be used as hemostatic sorbents and dressings. In this work, some samples of sponges had been obtained based on sodium alginate and chitosan. The concentration of sodium alginate in the solution, the ratio of alginate and chitosan were varied during an experiment. Polysaccharide cross-linking was carried out by inotropic gelation or by combining ionotropic gelation with ionic substitution. According to the literature, a chitosan have antibacterial properties ag...

Methods of parasite structures visualization using fluorescent probes are widely used in nowadays. The technological utilization of benzanthrone dyes is growing, but in biology studies they are still rarely used. Our studies show the advisability/expediency of using these dyes in investigation of helminthes structures. The aim of present study was to evaluate the novel synthesized luminophore AZP5 for efficient staining of trematodes for confocal laser scanning microscopy. All helminthes were previously preserved ...

Methods of parasite structures visualization using fluorescent probes are widely used in nowadays. The technological utilization of benzanthrone dyes is growing, but in biology studies they are still rarely used. Our studies show the advisability/expediency of using these dyes in investigation of helminthes structures. The aim of present study was to evaluate the novel synthesized luminophore AZP5 for efficient staining of trematodes for confocal laser scanning microscopy. All helminthes were previously preserved ...

Testing of synthesized magnetically separable catalyst (Pd-Fe3O4/HPS) was carried out in the selective hydrogenation of 2-methyl-3-butyn-2-ol to corresponding olefinic alcohol and also in the Suzuki cross-coupling of 4-bromoanisole and phenylboronic acid in a shaker-type glass batch reactor. In the case of selective hydrogenation, the use of Pd-Fe3O4/HPS was found to result in 94% selectivity at 95% of the substrate conversion that is typical for preliminarily reduced Pd/HPS catalysts. Regarding to the Suzuki reac...

In the zones of boreholes drilled to explore and extract hydrocarbons uncontrolled migration of gas to soil environment and therefore to atmosphere may occur. Such phenomena may be related to insufficient tightness of the rock mass or poor technical condition of the borehole. Due to the occurrence of potential risks to the environment and human health and life, a set of constant monitoring probes was designed and tested. Location of six permanent monitoring probes were based on the results of surface geochemical s...

The customer expects the quality and reliability of purchased devices. Every defect on the device causes loss of brand confidence and customer dissatisfaction. Customer satisfaction is, however, the best indicator of how likely customers will continue to buy in the future. If an organization wants to maintain a customer, it must be customer-oriented. The company has decided to improve the quality and reliability of its products. This can also help to increase the number of satisfied customers and gain competitive ...

The article presents practical problems related to the application of REACH and LCA standards in the construction sector. Chemicals are an essential factor in assessing and managing of all kinds of risk due to their importance as components of materials and their various effects, such as: adverse and beneficial, biophysical and socio-economic. The process of reducing of adverse environmental impact of construction sector on the environment is a subject of increasing attention of scientists and companies. It should...