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Multifunctional motor vehicles are equipped with one or more working mechanisms actuated by hydrostatic drive systems, which consume most of the power installed on such vehicles in which the primary mechanical energy is generated by an internal combustion engine, usually Diesel engine. Given the large number of daily running hours, (of multifunctional motor vehicles) the energy consumed by working mechanisms becomes important, the same goes for the expenses, and therefore it is required to be used with maximum eff...

Geodetic education in Romania has been imposed as an economic and scientific necessity, based on the low number of specialists in the field of land surveying. The changes that have taken place in Europe and Romania since 1989, through the transition from the state to the private ownership, have had the effect of making substantial changes in property registration and cadastral plans. Upgrading and modernization the cadastre to make it multifunctional, requires a large number of specialists with a uniform distribut...

Salvia species are parts of the daily routine of many communities in different regions of the world (Southern and Central Europe, North America, Middle East, etc.). Many research studies show a strong correlation between the concentration of some biologically active substances such as terpenoids, alkaloids, polyphenols and their antimicrobial action. The presence of these chemical compounds resulting from the secondary metabolism of the plant has determined that sage is of great interest to the food industry and i...

Salvia species are parts of the daily routine of many communities in different regions of the world (Southern and Central Europe, North America, Middle East, etc.). Many research studies show a strong correlation between the concentration of some biologically active substances such as terpenoids, alkaloids, polyphenols and their antimicrobial action. The presence of these chemical compounds resulting from the secondary metabolism of the plant has determined that sage is of great interest to the food industry and i...

Present paper is focused on the development of high performance concrete (HPC) based on white Portland cement, which could be used for the production fa?ade panels. Various doses of silica fume, up to 40%, were incorporated into the studied mixtures, however investigated mixtures were designed to constant consistency. The half of samples was cured under specific hydrothermal conditions to obtain higher degree of hydration. Properties of studied HPC mixtures were evaluated predominantly in terms of mechanical prope...

How to use fermentation residues is a burden on many biogas plants. Incorporation into arable land remains the most common approach, although application costs represent approximately the same benefit for fertilization, despite the risk of soil formation and the associated degradation of the soil's ability to retain water. An alternative how to use spent dust is to re-enter into raw material of the biogas plant or a second alternative is to use dust coal as wall surfaces in the interior because of its sorption cap...

Environmental pollution represents one of the serious problems of our society. During anthropogenic activities (mining and ore processing, metal processing industry) toxic compounds and heavy metals are introduced into our environment. Their accumulation in ecosystems creates a huge environmental load and it threats environment and human health. Another emerging environmental threat is a genetic pollution. Genetic pollution is an uncontrolled gene (usually antibiotic resistance gene) flow into populations of non-t...

Environmental pollution represents one of the serious problems of our society. During anthropogenic activities (mining and ore processing, metal processing industry) toxic compounds and heavy metals are introduced into our environment. Their accumulation in ecosystems creates a huge environmental load and it threats environment and human health. Another emerging environmental threat is a genetic pollution. Genetic pollution is an uncontrolled gene (usually antibiotic resistance gene) flow into populations of non-t...

The purpose of the article was to draw attention to various aspects of sustainable development of the construction and durability of building materials. A special emphasis was put to concrete, which is one of the most used building materials in the present. Elaborated was not only the issue of emissions released by the production of components necessary for fabrication of concrete mixtures, but also a number of environmental, economic and social advantages the use of concrete offers. At the same time, attention wa...

There are plenty of facilities, machinery and equipment, either stationary or mobile, which require hydraulic operating power, generated by low-flow pumping systems at high pressures. Such systems can be met in stationary applications, in which energy efficiency is important, while the pulsating nature of flow does not disturb, and also in dynamic applications, in which both energy efficiency and flow rate regularity are important. The first category of applications includes: static pressure tests on deepwater dri...

The obvious solution of the problem is to provide rhenium production in Russia. Natural environment is an advantage of the Russian Federation in this field. However, metal introduction to the world market can cause losing national jurisdiction control as its main consumer is the USA industry. Therefore, formation of the Russian national reserves has to be the main objective of the rhenium production system. Considering dynamics of its consumption, demand and prices will grow eventually. Rhenium accumulation for fu...

The objective of this article is to determine the need for joint security education of rescue components of the Slovak Integrated Rescue System. The reason for that is the absence of the joint education of these units which represents a critical point of their cooperation. In the introductory part we focused on the IRS?s characteristics as well as description of the security education. An important part of this article is an analysis of the management process, coordination and cooperation of the rescue components,...

The efficient use of cogeneration systems depends on both the heat demand variations and on the restrictions imposed by the related legislation. In this paper, in order to optimize the operating regimes of a Combined Heat and Power Plant, authors have determined the correlation between functioning modes of the plants? equipment and the possible solutions to satisfy with precision the consumers? heat demand. Often, optimizing only the operating regimes can be non-profitable, especially for the case of modern and pe...

The continuous increase emissions of greenhouse gas and the necessity to feel energetic security have caused the whole world increase the use of energy sources that are not based on crude oil and hard coal. Alternative to obtaining energy from fossil fuels is the production of biogas. One of the most commonly used raw materials for biogas production are maize silage. Therefore corn silage makes up 35-40% of the total cost of biogas production, which means that their use for biogas production does not bring big ben...

The geometric models of wireless sensor networks are analysed. The selection conditions of an optimal network model are proposed. To improve information security measures, the visualization method of changing the signals parameters with consideration of the number of information nodes and their location in space is developed. The development and advanced use of wireless sensor networks require constant improvement of their reliability, durability, and performance as well as a high level of information security. Th...

There are many ancient cultures in the world where there are no written sources and material evidence as artefacts preserved. Their identification or even revealing of signs is an important impetus for the initiation of further systematic research. In this sense, Indonesia, including the island of Bali, is a very typical example, where the earliest reliable evidence can be dated not earlier than the 4th century CE. Due to the natural conditions, there are few opportunities for the artefacts of natural origin and e...

The article describes the trajectory of the society's transition to sustainable development as a basis for environmental and economic security. The authors analyze the experience in the development and use of indicators of sustainable development, which are necessary not only for assessing the effectiveness and efficiency of scientific and technological progress and the development of economic systems, but also for forecasting and managing the transition to sustainable development. The systems of sustainable devel...

Competency-based approach in the modern educational process is aimed not only at obtaining subject knowledge, but also at the personal student?s growth. In this regard, the role of individual style of self-regulation and motivation of students? achievements increases. Conscious self-regulation is an integral system of psychological means aimed at the ability to determine the goals of their training, the ability to plan ways to achieve these goals, to be able to assess their own capabilities and to master the basic...

Indoor environment is considered to be a basic requirement for human health and well-being. Concentrations of indoor air pollutants are typically 2-5 times higher, and occasionally 100 times higher than outdoors. The condition and performance of the ventilation have a significant impact on indoor air quality. People are ordinarily exposed to high concentrations of pollutants in indoor environments. The consequences of low ventilation rates include elevated levels of carbon dioxide and other air contaminants indoor...

Environmentally oriented production is one of the major concerns of companies in the global competition. Clean technologies, green procurement and suppliers and distributors' chains of healthy products are processes and activities that are a consequence of the adoption of Corporate Social Responsibility (CSR) strategies, which are geared towards sustainable development. This article analyzes the link between the environmentally oriented production regarding responsibility practices in bakery companies and its effe...

The widespread use of fertilizers and pesticides impairs the state of the environment. Identifying the nature of the influence of fertilizers and pesticides on natural waters and identifying the extent of this influence is relevant today. The article discusses the influence of mineral and organic fertilizers on the qualitative characteristics of groundwater (waters of the first aquifer from the surface) in the Predvolzhsky region of the Republic of Tatarstan. Hydrogeochemical and agrochemical data help assess this...

The purpose of this work was to determine the impact of anthropogenic activities, which consisted in the expansion of the national road 51 to change the water relations in the Upper Pas??ka catchment. Hydrological measurements were carried out on the Pas??ka River near the Gry?liny village. Studies have shown that the expansion of road 51 has changed the way the river basin has been developed. The area of agricultural and forested areas decreased in favor of paved and built-up areas, which resulted in an increase ...

Nowadays, after periods of time without precipitation, more and more frequent rains are coming in with very high flows in very short time. In case of extreme precipitation phenomena, sewer networks can no longer take rainwater flows, which often occur with large damages, often with loss of life. Drinking water is not renewable. That is why it is important to protect drinking water sources by using rainwater more efficiently. By recovering, storing and using rainwater, costs are reduced by treating and transporting...

The flood time of Siberian Rivers coincides with the spring and summer period and is characterised by intensive water feeding because of intensive snow melting. At all that, the most annual water discharge is formed, the latter, by turn, causes erosion processes. In addition, in years with excessive amount of flood water, the inhabitants suffer economic losses very much: E.g., economic activity areas are flooded, engineering structures are washed away and damaged. A number of factors form high water level such as ...

The deviation from the design shape of an underground structure cross-section and its influence on the structure stress state are under consideration. External loads, corrosion and peculiarities of construction techniques, are assumed as the most probable causes of the deviation. The influence of shape changing is estimated by the analytical design method for multilayer underground structures with layers of variable thickness. The method is based on a rigorous analytical solution of the corresponding plane problem...

Dielectric barrier discharge is low-temperature plasma generated in cases with an dielectric material between the electrodes. The demanding applied task of water treatment is the removal of heavy metal ions, including iron (Fe) and nickel (Ni), ions, from aqueous solutions. The authors of the paper designed a plasma reactor that allows the dielectric-barrier discharge treatment of a solution near the surface of the liquid in the flow-through mode, so that this method can be used for technological purposes. The inf...

The researches carried out aimed at assessing foliar fertilization bio stimulating effect by increasing fertilizers nutrient use efficiency and their absorption into plants. Foliar fertilizing variants NPK were formulated during the research activities on a PK type matrix base with secondary nutrients and trace elements. The nitrogen source consisted of urea and ammonium nitrate in which 6% of the total nitrogen content was added as 15N isotope to the basic PK type matrix. Agrochemical testing were carried out on ...

Two technological factors were taken into study: loadings: 20, 28 and 36 eyes/vine, with the attribution of a cutting load of 8-10 eyes per vine and two eyes taps and the maceration-fermentation duration of the wine from marc, respectively 8 and 16 days. Feteasca neagra and Cabernet Sauvignon varieties, part of the basic assortment for the production of quality red wines, typicaly for Dealu Mare vineyard, were used. The polyphenol accumulation rate over the maceration-fermentation time registered values between 58...

Two technological factors were taken into study: loadings: 20, 28 and 36 eyes/vine, with the attribution of a cutting load of 8-10 eyes per vine and two eyes taps and the maceration-fermentation duration of the wine from marc, respectively 8 and 16 days. Feteasca neagra and Cabernet Sauvignon varieties, part of the basic assortment for the production of quality red wines, typicaly for Dealu Mare vineyard, were used. The polyphenol accumulation rate over the maceration-fermentation time registered values between 58...

Scots pine (Pinus sylvestris L.) stands are regenerated by planting, and only small portion (c.a. 13%) by self-seeding in Latvia. Seeds for plant production are collected only in seed orchards ? thus represent the results of tree breeding. Aim of our study was to assess the growth and damages as determined by forest type and genetics in Scots pine stands at the age of first commercial thinning. Tree parameters were measured in Scots pine open-pollinated progeny trials on mineral soils, differing by fertility (poor...

Due to the great interest in unconventional deposits, the aim of the current study has become identifying the target zones that the hydraulic fracturing treatment becomes the most efficient. The success of hydraulic fracturing depends on many factors. One of them is determining if the assumed fracture geometry is the same as created in hydraulic fracturing treatment as well as the appropriate selection sectors to be fractured. A great influence on fracture propagation and geometry predictions have rock elastic par...

The research consisted in obtaining Ni-P and Ni-P-Al2O3 coatings followed by heat treatment and characterization of heat treated and untreated layers. The layers were deposited on the steel strip, by electroless method to certain process parameters. To obtain the Ni-P-Al2O3 nanocomposite layers, 5 g/L Al2O3 particles of 20 nm were introduced into the nickel bath, and it has been worked with the same parameters as to obtain the Ni-P layer. The samples were heat treated at 300 0C, 400 0C and 5000C for one hour in a ...

Air quality is a challenging environmental issue in coastal areas where population and economic activities such as tourism, industry, ship and port activities are heavily concentrated. Air pollution levels vary depending on the emission sources (traffic, industry, energy production etc.) and on the atmospheric processes. Depending on their source and interactions with other components of the air, they can have different chemical compositions and health impacts. The understanding of the relationship of the pollutan...

The article describes behavior of ternary gypsum-based composites, especially the changes of properties caused by the influence of moisture. The ternary mortars are composed from gypsum, hydraulic lime, different types of pozzolan and standard sand. Pozzolans in the mixture react with hydraulic lime and form CSH and CAH phases. Presence of these phases improves resistance of gypsum against the moisture. The way of samples storage affects the development of materials structure and properties of gypsum-based mortars...

Drilling fluid significantly affects all technological operations in the process of deposit drilling and completion. The main task done by the drilling fluid is providing proper drilling and cleaning of the hole bottom from cuttings as well equilibration of the rock mass pressure, cooling and cleaning the drill bits. Moreover the drilling fluid should minimize the damage to the permeability of productive deposits in the near-well zone and maintain stability of the wellbore walls. For providing the correct protecti...

Mosses have been used for many years as bioindicators in the monitoring of environmental pollution by heavy metals. A meaningful constraint of this method is the lack of the possibility of sampling mosses in urban areas. In this regard, the active biomonitoring method, in which mosses are transplanted in the study area, is actively developed in recent years. However, to date no procedures for moss transplantation have been developed, which make it possible to obtain comparable results about the level of contaminat...

Angle of friction ?, cohesion c and undrained shear strength ?fu are the strength parameters that characterize the mechanical properties of soils. These parameters determine the bearing capacity of a cohesive subsoil. The value of strength parameters depends on many factors, e.g. soil type, consistency, stress state, stress history, loading type and loading mode. The paper presents the influence of plasticity index Ip on strength parameters in cohesive soils. To determine the dependence of strength parameters on t...

Winter pumpkin represents a seasonal crop of health and food interest due to its nutritional composition. The aim of the present study was to comparatively evaluate the content of the main antioxidant compounds, carotenoids and phenolics, from pumpkin (Cucurbita maxima) pulp as related to different pretreatment conditions. Samples of pumpkin pulp were subjected to three pre-extraction methods, as follow: freeze-drying, oven-drying at 60oC and freezing at -70oC. Conventional extraction of carotenoids and polyphenol...

Winter pumpkin represents a seasonal crop of health and food interest due to its nutritional composition. The aim of the present study was to comparatively evaluate the content of the main antioxidant compounds, carotenoids and phenolics, from pumpkin (Cucurbita maxima) pulp as related to different pretreatment conditions. Samples of pumpkin pulp were subjected to three pre-extraction methods, as follow: freeze-drying, oven-drying at 60oC and freezing at -70oC. Conventional extraction of carotenoids and polyphenol...

The use of various ingredients in the formulation of yogurt, in order to diversify a dairy product particularly appreciated by consumers, is a constant concern for industry specialists. The paper proposes the use pumpkin seeds in the recipe of a classic yogurt, in order to improve its physico-chemical, textural and sensory characteristics. Pumpkin seeds, like other oilseeds, are in the attention of specialists because they are a very good source of proteins and dietary fibers. For the consumer, the increase in the...

The use of various ingredients in the formulation of yogurt, in order to diversify a dairy product particularly appreciated by consumers, is a constant concern for industry specialists. The paper proposes the use pumpkin seeds in the recipe of a classic yogurt, in order to improve its physico-chemical, textural and sensory characteristics. Pumpkin seeds, like other oilseeds, are in the attention of specialists because they are a very good source of proteins and dietary fibers. For the consumer, the increase in the...

The geographical location of Lech Walesa Airport was described in relation to the country and the nearest city. Its most important elements as well as, main users have been characterized. The approach systems have been analyzed in terms of the manner of operation and the constraints associated with meteorological conditions for landing operations at the selected airport. Based on the collected climatic data from 2000-2016, using the graphs, atmospheric analysis of the selected airport was made. The METAR (METeorol...

In the paper, results of experimental research on parameters of ambient O2/N2 separation process, as well as their influence on energy consumption of the process are presented. On the basis of the experimental investigation, computational analysis of O2/N2 separation process of a membrane working in a cascade system with lack of gas recirculation is performed, concerning especially its applicability in oxy-combustion power technology and others. The NM-BO2A polymer membrane by UBE is used for experimental phase of...

The researches were carried out in two vineyards grown with the Feteasca neagra and Cabernet Sauvignon varieties, with two experimental factors: the soil maintenance system (black furrow, total mulching with straws, partial mulching with marc compost, permanent herbage with grasses spontaneous flora) and the system for the control of pests and diseases (ecologically and conventional). The experimental results obtained showed that under the ecoclimatic conditions specific to 2017 year, characterized by a high helio...

The researches were carried out in two vineyards grown with the Feteasca neagra and Cabernet Sauvignon varieties, with two experimental factors: the soil maintenance system (black furrow, total mulching with straws, partial mulching with marc compost, permanent herbage with grasses spontaneous flora) and the system for the control of pests and diseases (ecologically and conventional). The experimental results obtained showed that under the ecoclimatic conditions specific to 2017 year, characterized by a high helio...

Population densities of cervids (moose, red deer, roe deer) are increasing sharply and consistently in Latvia since middle of 1990th, causing more damages in young forest stands. It is a result of changes in farming practices well as game-management strategies by hunting clubs. Many hunting clubs tend to keep or increase the population densities of cervids with different methods, including supplemental feeding. The aim of the study is to evaluate the impact of the proximity of supplemental feeding sites on browsin...

Renewable energy sources (RES) are of great interest across the world, since it can be used to obtain clean, green energy, thus minimizing the environmental pollution. Romania has an important potential for development of renewable energy, in the hydro, wind, solar, geothermal, and biomass fields. But the market of RES expands or shrinks being influenced by policies, technologies and financial support change. The transposition of Directive 2009/28/EC of the European Parliament on the promotion of the use of energy...

Multi-well pad drilling originates from offshore drilling where the use of this method is dictated by the limited mobility of platforms. Onshore group location of the wellhead slots is used since recently. It was first used in the Rocky Mountains in the USA in 2004. Beginning is related to the commencement of hydrocarbon extraction from unconventional reservoirs in the United States. Exploitation of unconventional shale and tight reservoirs with vertical wells is economically unprofitable because it is not possibl...

Instruments of tax policy should have an impact on resource conservation. The task of increasing the investment activity in the field of resource saving stipulates the need to develop effective instruments for tax regulation. By creating special taxation conditions for investors in resource-saving technologies or companies producing such technologies, the state affects the resource-saving policy. At the same time, the experience of the functioning of environmental funds in Russia testifies to the need for tax admi...

The small combustion devices in the municipalities are significant element of the air pollution, especially in the winter season. Currently, there is increasing a choice of the alternative sources of heating and biomass combustion. However, even in these combustion processes are fine particles formed, which affects human health. The paper is focused on the issue of biomass combustion processes in the laboratory conditions, where was monitored the concentration and distribution of particles ( < PM10) with using of ...