Browse

This paper presents analyzes of volumetric density based on the results of experimental sampling at one of the Cu-Ag LGOM deposits. These analyzes were carried out in order to assess a value of this parameter in chosen 3 of 9 individual lithological units (streaky dolomite, dolomitic shale and carbonate sandstone).The selection of individual lithological units was based on the number of samples taken and examined in particular lithology. An attempt to determine the structure of variability of volumetric density wa...

This paper addresses mechanisms of destruction of methane-saturated coal at micro- and macro-levels under dynamical impact due to methane transition from its natural bound to a free state. The focus is on possible destruction of practically impenetrable (crushed and pressed) coal. Our study is based on analysis of experimental investigations and computed modeling. The experimental investigations involved experiments with rock pre-cracking under explosive impact and analysis of photo images of coal microstructure a...

The aim of this study was to analyze the effect of calcium ions from lactate salt at four levels of 0, 100, 150 and 200 mg/100g addition in wheat flour of a high extraction rate on fundamental dough rheological properties and bread quality. Wheat flour used in this study was of a strong one for bread making having 14.3% moisture content, 1.25% ash content, 14.3% protein content, 1.92% fat content, 35% wet gluten content and 3 mm gluten deformation index. Dough fundamental rheological properties were analyzed using...

The aim of this study was to analyze the effect of calcium ions from lactate salt at four levels of 0, 100, 150 and 200 mg/100g addition in wheat flour of a high extraction rate on fundamental dough rheological properties and bread quality. Wheat flour used in this study was of a strong one for bread making having 14.3% moisture content, 1.25% ash content, 14.3% protein content, 1.92% fat content, 35% wet gluten content and 3 mm gluten deformation index. Dough fundamental rheological properties were analyzed using...

The climatic changes effects manifested through extreme meteorological phenomena (wind, temperatures, precipitations) are highly affecting forest vegetation. A rare meteorological phenomenon (freezing rain), associated with an intense wind was encountered in 2015 towards the end of the vegetation season (October, while the leaves had not fallen yet). This phenomenon has caused important damages in the common beech stands located in Romania?s Sub Carpathians. The present paper presents the results of investigations...

The research was carried out in the western part of Romania, in Belin?, a commune located in the N-E area of Timi? County. The climate is temperate continental, with an average annual temperature of 10.6В°C, the heat regime being favourable to the sweet corn crop. The average annual rainfall value of 605.5 mm provides relatively good conditions for the crop under study. The type of soil is a Eutric alluvial soil, fine-grained sandy-loam/medium sandy-loam, on rough fluvial materials, with a pH of 5.80 in water, and...

The research was carried out in the western part of Romania, in Belin?, a commune located in the N-E area of Timi? County. The climate is temperate continental, with an average annual temperature of 10.6В°C, the heat regime being favourable to the sweet corn crop. The average annual rainfall value of 605.5 mm provides relatively good conditions for the crop under study. The type of soil is a Eutric alluvial soil, fine-grained sandy-loam/medium sandy-loam, on rough fluvial materials, with a pH of 5.80 in water, and...

The research was made in the hilly area of Southwest Romania, on the territory of Caras Severin County. The researched area has a moderate continental temperate climate. According to Koppen, the climate is classified as c.f.b.x. The annual average temperature is 10.8В°C and the annual average precipitation is 631 mm. The soil type on which the research was made is typical gleisoil with a pH value in water of 6.02 and a humus content of 2.56% [5]. The dolomite used in the research was chemically analyzed in Austria...

The research was made in the hilly area of Southwest Romania, on the territory of Caras Severin County. The researched area has a moderate continental temperate climate. According to Koppen, the climate is classified as c.f.b.x. The annual average temperature is 10.8В°C and the annual average precipitation is 631 mm. The soil type on which the research was made is typical gleisoil with a pH value in water of 6.02 and a humus content of 2.56% [5]. The dolomite used in the research was chemically analyzed in Austria...

The objective of the paper is to emphasize the influence of the reclamation works of sloping land with medium-gradient hills on the field capacity and water distribution on the soil profiles located on the upper, medium and bottom ameliorated slope. The study of retaining water capacity of soils was carried out on a slope with eastern north-eastern exposure of the Ezareni farm. Soil samples were taken in spring of 2017 and 2018, immediately after the snow was melted, from 10 to 10 cm on 100 cm depth. Soil samples ...

Simple and cheap methods for the study of building stone deposits for the production of blocks of commercial size can be used to make geological work more efficient. However, physical processes in a massif are hard to understand when doing geophysical research, and the effect of microstructural parameters, mainly the microfracturing of rocks, on geophysical field indices is poorly understood. The authors have studied the impact of microfracturing on the physico-mechanical properties on coarse- to giant-grained rap...

The heliostat structure and shape must deliver the essential rigidity to accurately reflect solar radiation onto the target under several working conditions. Therefore, the aim of this study is to investigate the effect of various rectangular heliostat shape aspect ratios ? =L/W on the spiral layout performance considered by keeping the same heliostat area. Here ?L? and ?W? are the length and width of the rectangular heliostat shape respectively. A combination of an-inhouse developed computer code based on the vec...

This paper focuses on a study regarding the use of waste in constructions: such as blast furnace slag from ironworks, as a by-product of the iron oxide reduction reactions by carbon monoxide resulting from coke burning. The slag is used in cement-based mortar mixtures under two forms: as granulated and ground slag powder under 63 ?m and non-granulated slag as an 0/4 mm aggregate resulting from solid slag, processed in crushing equipment and then sorted according to the standards on mortar and concrete aggregates. ...

Salinity is one of the major environmental stress factors for crops that adversely affect plant growth and development. High concentrations of salt in the soil cause ion toxicity, osmotic stress, oxidative stress, nutrient deficiencies and imbalances perturbing important physiological and biochemical processes. To minimize the effects of salinity, the plant develops a large array of responses involving a complex enzymatic and non-enzymatic antioxidant system, ion transport and compartmentalization of deleterious i...

Salinity is one of the major environmental stress factors for crops that adversely affect plant growth and development. High concentrations of salt in the soil cause ion toxicity, osmotic stress, oxidative stress, nutrient deficiencies and imbalances perturbing important physiological and biochemical processes. To minimize the effects of salinity, the plant develops a large array of responses involving a complex enzymatic and non-enzymatic antioxidant system, ion transport and compartmentalization of deleterious i...

The temperature makes considerable impact on gold-bearing minerals decomposition. So, by the Russian scientists on an example of May deposit concentrate it has been shown that the increase in temperature of a pulp to 34 - 36В°? intensifies oxidation of gold-bearing mineral - arsenopyrite: after the lapse of 48 hours oxidation degree arsenopyrite reached 95%. On the basis of studying kinetics biooxidation of sulphidic minerals by microorganisms association at various temperature modes in some research institutes of...

The main aim of study is to propose a method to diminish the negative effects of the drip irrigation in dens soil layer (Also called: plowpan, plow sole or tillage pan) on the vegetables growing in high plastic tunnels established on the Cambic Chernozems with fine texture from north ? east of Romania. In gardening in almost all cases the water in soil provided from irrigation, especially by drip irrigation. In this condition, the soil horizon located immediately below the ploughed layer is compacted over time. Th...

Nowadays, raised awareness about the importance of sustainability and also the environmental impact of using concrete in the construction industry has led to numerous studies on how to create an environmental friendly material, with self-cleaning properties and how to possibly use it in urban areas and to ensure a cleaner environment and reduce maintenance costs. Nitrogen oxide (NOx) is the air pollutant which is directly responsible for the air pollution due to smog, smoke, vehicle emission, etc. The self cleanin...

Unmanned aerial vehicles are used now in different spheres of economy from agriculture to inspection of industrial facilities. In view of the increased demand for this type of service, the quality of the data received has become a question. One of the most important factors affecting the quality of the data is the efficiency of self-calibration of non-metric digital cameras. The criteria have been defined for evaluating the effectiveness and feasibility of self-calibration for a particular photogrammetric network,...

In order to keep pathogen damage to an acceptable level, pesticide application is needed, but abusive pesticide use may lead to negative changes in the biological balance by the presence of toxic residues. In the orchard experiments, the effect of conventional and unconventional treatments applied to vegetation in the control of the main pathogens of the apple. Five varieties were used: Granny Smith, Topaz, Imperial Gala, Jonagold, and Golden Reinders. Due to the large harvest losses, both quantitative and qualita...

In order to keep pathogen damage to an acceptable level, pesticide application is needed, but abusive pesticide use may lead to negative changes in the biological balance by the presence of toxic residues. In the orchard experiments, the effect of conventional and unconventional treatments applied to vegetation in the control of the main pathogens of the apple. Five varieties were used: Granny Smith, Topaz, Imperial Gala, Jonagold, and Golden Reinders. Due to the large harvest losses, both quantitative and qualita...

According to the Aridity Index (R), at the level of the Eastern Romanian Plain have been identified certain areas of aridity intensity, differentiated from the West to the East as a result of the degree of continentalism increasing, which also led to a specific geobotanic zoning (the forest area, the interference between the forest-steppe, ante-steppe and steppe). The degree of vegetation coverage is an objective indicator of susceptibility of soil and/or land to degradation processes, which are manifested on larg...

The current article makes a comparison between the Web Mercator and Mercator projections, the former being frequently used for web mapping and visualisation applications. Web Mercator shows some significant differences from the Mercator projection: the Earth is approximated to a sphere, it is not conformal and the rhumb lines are not represented as straight lines on the plane. Both map projections were compared here with one another for representing Romania. Through Web Mercator, a shift to the North was found whe...

The industrial revolution, dynamic economic growth and population growth in the world mainly affect to an increase in demand for electricity. The energy sector is responsible for 2/3 of the world?s greenhouse gas emissions. The European Union is leading the global action against the climate change, both by planning international actions aimed at reducing global warming to the level of 2В°C, as well as through its own commitment to very significant greenhouse gas emissions reduction. The decarbonisation of the elec...

Reducing energy costs and cost of production is a strategic goal of an industrial enterprise in the field of energy conservation and energy efficiency. The main driving force for the activities of the organization is staff. Therefore, the constant increase of knowledge and competence of employees on energy saving and use of secondary energy resources are the main points of the social and environmental policy of the industrial enterprise [1]. Only by motivating and involving staff, improving the control system, imp...

In comparison to other countries of the Southern Caucasus, Armenia is the country with the least number of people, the smallest territory, landlocked, dependent on external energy supply. Armenia is also engaged in the military conflict in the area of neighboring Azerbaijan to defend the interests of Armenian living there. Armenia hasn?t got its own fossil energy sources and it is also not a transit country, which transit oil and natural gas through its territory. Therefore, this country is heavily dependent on en...

The quality of life can be assessed according to a variety of indicators e.g. financial provision, access to goods and services, the quality of environmental particles etc. These indicators can be well-measurable; they are all objective ones. There are many others, such as liberty, happiness, sense of security etc. These indicators are far more difficult to measure and we call them subjective indicators. The security is one of the essential indicators of quality of life. There is no way to reduce security just to ...

This article is focused on possibilities of dedusting equipments to capture particulate matters from the chosen production process of the metallurgical plants in the Czech Republic. It deals with the issue of particulate matter generated during the production of pig iron. The article presents the manufacturing process at main sections of a metallurgical enterprise for the production of pig iron and possible formation of particulate emissions in individual sections. The emissions from sinter plants dominate the ove...

Cross-dipole acoustic logging traditionally uses to study the anisotropy of the formation acoustic properties. The method is based on comparing the velocities of fast and slow shear waves and calculating the anisotropy coefficient. In the anisotropic formation, the flexural wave is splitting into two modes. The amplitude of cross-components XY and YX will be non-zero and significant in the anisotropic zones of the formation. There are several approaches to assessing the presence of anisotropy in a formation. As a ...

The purpose of this paper is to present traditional building concepts from the local seismic culture, with a seismically resilient typology: from timber structures to framed wall structures, timber frame structure with infilling materials etc. The structural shortcomings of masonry structural systems with one or two storey, which were observed at the incidence of intermediate Vrancea earthquake from the past, will be emphasized: some architectural and constructive elements that impose a good/poor behavior and type...

The aim of this paper is to analyze the possibility to use a wide angle lens for historical basements investigation. For this purpose the test site located in the Bieli?ski Palace in Otwock Wielki, Poland, was chosen. In order to generate a dense point cloud Agisoft PhotoScan was used. Reconstruction results were compared both with the Terrestrial Laser Scanner point cloud and data acquired from a normal lens camera. The main advantage of the point cloud acquired by the wide angle lens is the higher robustness of ...

References to theoretical research of aerostatic bearings and the method of their analysis for choosing options of aerostatic direction are provided. The calculation is done by means of a numerical method based on the field pressure approximation in a gap by means of differential algebraic equations, which takes into account two-dimensionality of the lubrication flow in bearings of various configuration and gives results close to actual ones. With the assumptions made in order to simplify calculations, flow line d...

In order to ensure energy security, at national level, coal constitutes an important source, though its share in the energy mix is reduced in the past few years in favor of clean technologies and on the background of the fall in the energy consumption. Where can be located in the project of energy security, the production of coal, exploited in the mining units in the Jiu Valley and valorized at the two power plants, Mintia and Paroseni-components of the Hunedoara Energy Complex, amid the request for intervention f...

The aim of the study was to present of phosphorus and nitrogen migration direction in the flow - through lakes system by mathematical relationships. Mathematical models included the water flow at the inlet and outlet of the lakes, the residence time of lake, the phosphorus and nitrogen concentration in the water and bottom sediment, the size of nutrient release from bottom sediments. The models of P and N retention for lakes of upper Pas??ka indicate that the retention of nutrients in flow - through lakes is prima...

Market transformation processes of the machine-building enterprises have acquired special significance in connection with the defining role of these enterprises in providing of innovative development of economy in Russia and the complexity of their adaptation to market conditions. Integration of machine-building enterprises in the market field requires new approaches to the formation of product portfolio of enterprises which are discussed in detail in this article. Competitiveness of the final product is determine...

The foundation of buildings is one of the basic tools of a landscape design. In the interests of today's society is to use abandoned areas, buildings, industrial sites also known as brownfields are used for re-use and to prevent the creation of new territories, for the purpose of foundation engineering. In these cases, it is important to know not only the overall character of the solution site but also the geological subsoil, which significantly influences the proposed building - technical solution. For this reaso...

The dynamic changes occurring in recent years in the global industry have been referred to as the fourth industrial revolution. The main assumption behind this concept is extensive implementation of IT and ICT developments into production processes. Production processes should make maximum use of the latest technologies, thus leading to the creation of intelligent factories in the end. In such a factory, wireless network systems are supposed to quickly and reliably combine all the components of the production proc...

The article presents research results carried out by the authors in the field of ensuring the energy security of Poland based on a hard coal. The article contains a brief description of the energy market in Poland, the forecast of the electricity production volume up to 2020 (ARIMA model (0,2,1)), as well as the possibilities of using Clean Coal Technologies (CCT). The necessity to undertake activities related to the development and implementation of the CCT is dictated mainly by the growing level of greenhouse-ga...

The research analyses and evaluates changes of dendrometric indices of Scots pine (Pinus sylvestris L.) young growths over years, characterizes the impact of various factors on growth course. The investigation includes data of 84 sample plots arranged in western, central and eastern regions of Latvia. The established sample plots comprise forest compartments in Vacciniosa, Myrtillosa, Hylocomiosa, Vacciniosa mel. and Myrtillosa mel. site types. The data obtained in sample plots were collected in period between 201...

Geomonitoring of a mining infrastructure has a crucial impact on company?s proper functioning and safety. For many years one of the most popular monitoring methods in Poland was to measure the tangent directions at multiple levels of a slim construction such us headframe or chimney (bisector intersection). Modern methods contain also GNSS measurements. However, the best method to generate a true shape is TLS measurement and 3D model preparation. Analysing such model, it is possible to determine not only the maxima...

Romanian forest and vinicultural ecosystems were strongly affected by climatic changes, especially during the last two decades. The main changes manifested in the health state of these ecosystems were analysed based on data from national monitoring, forest management plans, as well as from national forest statistics (in the case of forests). Furthermore, harmful insects were inventoried and captured with adhesive yellow traps and analysed together with moths captured with traps containing Atrabot synthetical sexua...

In this article, the issues of perspective development of telecommunication networks in the era of structural shifts in the socio-economic system are considered. To solve the problems arising in the course of this transition, the goals and objectives of the research are formulated, within the framework of which the peculiarities of the development of telecommunication networks have been revealed and the stages of their evolution have been determined, taking into account both the growth of the technological infrast...

With the rapid development of Turkey?s petroleum industry, oil production, the way of burning crude oil to produce steam, need to change. Heavy oil reservoir with thin layer or edge water is unsuitable for thermal recovery. Electric heating leads to considerable electrical consumption. Low injection water temperature decreases reservoir temperature and increased crude oil viscosity. The prolonged temperature difference break up reservoir pore throat cement and framework minerals. To improve high-capacity channel c...

The article is concerned with underground and pit water hydrodynamic regime during Shumicha deposit Kizel coal basin storage underground treatment and after closure and inundation of self-titled mine. On the area of the deposit a heavy fissured-karst water level of Visean and Serpukhov stages carbonate deposits, fissured-stratal water complex of Visean stage coal-bearing series and fissured-stratal and fissured-karst water complex of Tourian stage of the lower carboniferous are developed. In vivo rivers Kosva and ...

Hydrogen sulfide is a gas that is formed in various water bodies due to the flow of sulphate reduction and putrefaction of organic matter of bottom sediments. Hydrogen sulfide can also get in the water of reservoirs and watercourses with wastewater of various industries and farms. In the water objects of fishery and drinking water use concentration normalized, since due to the toxicity of hydrogen sulfide deteriorates the water quality, occur hypoxic effects and death of aquatic organisms, while for ponds with mud...

The paperwork is based on the data emerged from a conducted research related to a moisture influence on ignition sensitivity of air-methane gas mixture. For the purpose of this demarche the Bayesian statistics was used to fit a proposed mathematical model. In the first part of the paper it was presented the spark test apparatus used for the experimentation and the results of the experimental data obtained during the tests with moisturized air-methane mixtures. In the second part it was proposed and presented the t...

The development strategy in tourism industry requires a complexity of processes which claim the combination of the economical, social and environmental factors, concreted in medium and long term progress of the tourism society. Generally, sustainable development follows the performance on three levels - economic, by increasing the development degree and resources development, ecologically through recycling and avoiding environmental and social degradation by increasing the number of jobs, re-launching the traditio...

The existence of old unused buildings, called brownfields is one of the major urban problems today. In addition to the well-known environmental or social problems, the existence of brownfields is linked to economic problems, including, among other things, the decline in the prices of surrounding, especially residential, properties because of a reduction in social status and the prestige of the site. This article attempts to quantify this problem in a framework. On the example of several locations in the Moravian-S...

The article examines the impact of climate on wool productivity formation in Askanian fine fleece sheep of the Tavrian type in the south of Ukraine. Choosing the parameters for assessing the relationship between living organisms and the environment is a topical issue. The paper systematizes the data on wool clips depending on air temperature and amount of precipitation on the territory of the Kherson region in 1990-2016. The research conducted established a dependence of sheep productivity on economic and climatic...

The article discusses the geological structure of the Middle Devonian dolomites deposit located in the south-eastern part of Poland, in the Holly Cross Mountains, in the central part of the kielecko-lagowskie synclinorium. The deposit is cut by large, four-level open pit mine. It contributes to follow tracking the variability of the formation of Devonian sediments to a large extent. Within the deposit, the lithological diversity of the dolomitic series and the intensity of tectonic phenomena are observed. In terms...