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In Romania, wheat is the main crop, occupying the largest area of arable land. Convolvulus arvensis is a competitive and invasive weed, produces direct and indirect damages to which is added production of allopathic substances. Allelopathy is a natural phenomenon which refers to any direct or indirect effect, positive or negative of a plant (including microorganisms) on the other by the release of chemical compounds in the environment [13]. In most cases, influence is inhibitory, which may explain why some plants ...

Air pollution represents at present the biggest threat to human health due to high levels of pollutant emissions, usually in high-traffic urban areas. Air pollution has been associated with a number of health problems, including heart disease and lung cancer. Urbanization associated with rapid industrial development has led to serious air pollution problems in many large cities across Europe with significant impact on public health and even on the global climate. Information on air quality in urban areas is an imp...

The aim of this work was to determine, comparatively, the content of vitamin C (by iodometric method), polyphenols (by Folin CiocпїЅlteu assay), chlorophyll pigments, carotenes, xanthophylls (by spectrophotometric method) and the antioxidant activity (by CUPRAC method) for some frozen vegetables on the Romanian market: okra (Abelmoschus esculentus), green beans (Phaseolus vulgaris)- Serengeti variety and green peas (Pisum sativum) пїЅ Alaska variety. Frozen peas was the most rich in ascorbic acid (9.32 mg/100g) an...

Human activities as land use and management impact soil functioning. These are amplified also by stress factors as extreme climate events (drought, flood, heat waves) and meteorological anomalies, consequence of climate change. Although there are clues on how these challenging factors affect quality and functioning at its top surface (between 0 пїЅ 15 cm), there are minor information on how these impact soil in its depth profile. This study present obtained data from assessment studies performed on agricultural la...

Nowadays, deforestation process in Romania is in a growing trend considering the need for wood in industrial process, the fast rate of illegal logging and the need for lands in agriculture. Forest areas are subject of an increase pressure from socio-economic factors. Wood is used frequently as construction material and combustible. We investigated the evolution of forest areas in North-East Development Region and the incomes in economy related to forest activities (sylviculture and other forestry activities, loggi...

Background: The aim of this study was to analyse the serum biochemistry of value intervals for the most commonly used energetic biochemical variables of European mouflon from a game reserve in the eastern part of Slovakia. From biochemical variables, glucose (GLUC), cholesterol (CHOL), high-density lipoprotein (HDL), low-density lipoprotein (LDL) and triglycerides (TRIGL) were analysed. The obtained values may be of use for the health assessment of Moulton in further studies. Methods: During the research between 2...

In this paper, we present a performance assessment of the implementation of the algorithm of wave sources location using wave field modelling on a Graphics Processing Units (GPUs). The numerical algorithm of wave source location based on the acoustic wave equation was implemented using finite difference method. To achieve better wave source location, the algorithm was implemented using staggered grid meshes. The parallelization was carried out using GPU approach, established in NVIDIAпїЅs Compute Unified Developme...

In the recent decades, environmental pollution has been one of the major interesting research subjects where pollution might have a direct influence on public health and possibly cause serious and irretrievable damage to the Earth. The aim was to determine the levels of the heavy metals, Cu, Zn, Cr, Cd, Pb and Ni, in soil of urban areas in the city of Brno (Czech Republic). Soil analysis was performed on urban soil from the same layer, where the soil samples come from the depth of 20 cm. These samples were taken f...

In the present study it was evaluated the capacity of molasses for removing seven metals (Fe, Zn, Cu, Cd, Cr, Pb, and Ni) from three types of waste: galvanic sludge (pH = 7.1 пїЅ 7.8), mineral residue from a lead metallurgical plant (pH = 5.0 пїЅ 5.8) from Baia Mare (Romania), and tailing pond residue from Aurul - Baia Mare (pH = 2.1 пїЅ 3.0). Several leaching tests were conducted in the laboratory in order to investigate the influence of molasses concentrations (0 %, 1%, 5%, 10%) on heavy metal leaching. It was o...

The article concerns the problems of assessment the stability of the historical mine excavations which will be adapt to the underground tourist route. The issue is very important because of the special safety requirements for people (visitors), which do not have specialized safety training for employees of a typical underground mines. Post-mining facility, open to the public in 2013 in Krobica in Poland was characterized. Excavations from the XVI-XIX centuries are located in the rock mass characterized by a diffic...

One hundred and fifty-six groundwater samples were collected from the Aosta Valley region, Italy and analyzed for pH, electrical conductivity (EC), total dissolved solids (TDS), total hardness (TH), major cations (Ca2+, Mg2+, Na+ and K+), major anions (HCO3-, F-, Cl-, NO3-, SO42-) to evaluate the hydrogeochemical characterization as well as water quality of the area. A geographic information system (GIS) tool was used to study the spatial variation in the groundwater parameters of the study area. The analytical re...

The increase in the number of potentially toxic substances has led to a more complex task of determining the toxicity of water resources. This is due to an increase in the number of necessary techniques for the separation, identification and subsequent analysis of individual components. At the same time, the determination of quantitative relationships between individual components does not allow us to determine precisely whether these concentrations are sufficient to classify the water samples under study as toxic...

During operation of underground gas storage there is the possibility of a gas leak under certain circumstances. It can be caused by leakage of gas from underground gas storage due to the untightness of injection/withdrawal or observation wells. This leakage of gas can be happened in the case carrying out cementation of casing string in low quality. Presented article focuses on the control of wellпїЅs tightness using pressure measurements on annular casing. The aim of pressureпїЅs measurement on casing strings is t...

Cities have a significant contribution to the contamination of urban lakes by input with surface runoff, illegal wastewaters discharges, sewage discharges, which lead to increased eutrophication and reduce the ecological health status. Complex temporal monitoring is needed to understand the changes in water quality, including dissolved organic matter. This study presents the first temporal evaluation of dissolved organic matter from urban lakes, using fluorescence spectroscopy. Samples were collected from urban la...

Labour protection involves the safety and health of employed individuals. It has to be one of the priorities for any employer, as employees are a resource to be cared about and made satisfied. In Latvia, regardless of the requirements of law, the State Labour Inspectorate revealed 10 815 violations of the labour protection legislation in 2014. Besides, in the period 2010-2014, the number of accidents at work annually increased, reaching 1763 in 2014, of which 213 accidents led to serious health disorders, while 41...

This paper presents an assessment of power generation losses of a hydropower plant (HPP) due to an imposed reservoir management plan and comparisons in terms of monetary value with the existing management plan but with an eutrophic reservoir. The study case is represented by Gole?ti reservoir, which is a shallow reservoir in Romania, and the associated HPP. Gole?ti reservoir is an artificial lake of medium size, which has a 55пїЅ106 m3 volume and a maximum depth of 32 m. Its use is complex: it allows flood control...

Saline soils do not play a leading role in human economic activity. At the same time, they occupy large areas in the world and perform important ecological functions пїЅ maintaining the biodiversity and sustainability of natural ecosystems. By the end of 2018, the road and rail bridge between Taman and Crimea will be built. The construction of the bridge, the operation of the road, and the development of the related infrastructure will strengthen the human impact on soil cover in the region. One of the negative ef...

The Moravian Karst, situated in the eastern part of the Czech Republic, is the most extensive and most developed karst area in the Bohemian Massif. To protect its unique environment, the Moravian Karst was declared a Protected Landscape Area in 1956. Despite the protection, pollution occurs in some disappearing streams both on the earthпїЅs surface and underground, in caves formed by karst processes. The aim of the study was to assess the hydrochemical status of several selected streams and identify the sources of...

The paper considers the issue of effective scale inhibitor applied while developing an oilfield using steam assisted gravity drainage technique, and presents a case study of injecting superheated steam of 140-160?C in the Ashalchi oilfield. In such conditions, organophosphorus chelating agents conventionally used to prevent scale formation degraded and proved to be ineffective. The authors analyzed chemical composition of scales deposited on the electric submersible pump pulled from one of the wells in the Ashalch...

Regarding to the situation in Romania, the country's total agricultural surface of 14.946 million ha, an area of 6.367 million ha (42.6%), with slopes greater than 5%, is prone to water erosion and other processes associated. Of these, over 900,000 ha are affected by very strong and excessive erosion. The study aims to quantify the soil loss by erosion process and to specify the main factor affecting the erosion development in the study area using geoprocessing techniques and the erosion predictive model Revised U...

In the article provided assessment of water supply sufficiency of agricultural lands of South Kazakhstan which is the region of pasturable livestock farming and irrigated crop farming. The regional specific of irrigation of pasturable land and arable land is described, the sources of water supply are determined and their technical condition is estimated, the territories where irrigation of agricultural lands assessed as critical are detected. The solution of such tasks will allow to work out scientifically justifi...

The areas of gold mining in Kemerovo region in Russia are highly transformed by technogenic processes connected both with the ore extraction and processing (dressing). In Kemerovo region there are two former gold mining areas characterizing by strongly altered landscape and pollution by toxic chemical elements. There are two types of waste storage in these territories пїЅ waste dumps and tailings. The waste storage sites have definite impact on the surrounding environment leading to the changes in geochemical feat...

In central and western Poland in the rural areas there is a lot of lignite deposits, which utilization by building mining and power complexes could give impetus to development. The paper attempts to evaluate the impact of their construction by comparing socio-economic development indicators and quality of life conditions of residents in two regions. In the area of Belchatow, in which operates the largest lignite mine and the lignite fired power plant (commune Kleszczow) and commune around deposit Gubin-Brody with ...

The relevance of the study is caused by the poverty of the region of researchon sweet water resources: there is a shortage of water resources suitable for domestic and drinking needs. The giant sand massif Naryn of 30 thousand km areabetweenVolgaundUral rivers is practically not studied. Themassifisconsideredasaperspectivebecauseofpresence of fresh groundwater lenses of considerable scale, development of continuous large ridges and barchan-type massifs. Eoliansandshaverelativegoodfiltratingsurfacesandsandcapacitie...

The problem of recreational use of forest areas in modern conditions has gained special relevance. This is due to the following reasons: increase in neuro-psychological stress, number of stressful situations and the desire of the people to remove these loads, i.e. to improve their psycho-physiological state in a forest; development of the road network and means of transport; a variety of landscapes and a wide range of recreational opportunities (recreation, collecting of mushrooms, berries, balneological effect of...

Bucharest-Ilfov Development Region is located in the central part of the Romanian Plain and includes the Bucharest municipality (the capital of Romania) and Ilfov County. Man-made hazards can involve casualties and environmental pollution, also being recognized for the generated social, environmental and economic impacts. The current study entails the regional assessment of multiple man-made hazards (sometimes referred to as technological hazards) in one of the most developed Development Regions in Romania, i.e. B...

In all countries, many practical observation and theoretical studies are devoted on the soil and water erosion. However, there are still significant shortcoming in theoretical and experimental parts due to the underestimation of its physical causes and excessive enthusiasm of "empirical formulas", which is not often taken into account the elementary physical conditions in erosion processes, so the responses are not very accurate. There is also other useful model which is called GIS; the model is very powerful to e...

The main and typical changes in the natural complexes of tundra and forest-tundra in the areas of development of oil and gas fields were considered. Assessment of the stages of transformation of plant communities and soil cover due to anthropogenic load has been characterized. With the development of gas and oil fields in the north, pollution leads to a significant transformation and degradation of natural complexes. However, these violations are insignificant in area and localized. Various mechanical disturbances...

Reliable estimates of water balance components are important for solving various tasks in water management, such as hydropower management, flood forecasting, etc. It is well known that the modeling of the water balance components is associated with several problems, e.g., uncertainty in inputs, model parameters and model structure. Considering various data sources in the parameter estimation process can be a good way to improve model consistency and also to reduce parameter uncertainty. The objective of this study...

The Vrancea seismogenic zone is real menace not only for Romania but also for the neighbouring countries. Vrancea earthquakes cause casualties mainly in northern Bulgaria. Vrancea source is rather active one пїЅ more than 10 quakes with magnitude 5.1 < Mw < 7.0 (depth of hypocenters of 40 to 154 km) occurred during the last 30-ty years. In the last decade the Vrancea quakesпїЅ impact on our territory have been thoroughly recorded by the digital stations of the National Strong Ground Motion (SGM) Network of Bulgari...

Groundwater represents worldwide the main reserve of freshwater for human needs. The increasing demand, combined with the use of unsustainable systems for groundwater management, leads to a remarkable decay in its quality and quantity, especially in many cities of the Global South, where the fast urban growing frequently bring to environmental critical issues as the case of seawater intrusion for coastal aquifers. Dar es Salaam, in Sub-Saharan Africa, is one of these cities, with more than 4 million of inhabitants...

The research in dairy cows in mountain aria demonstrated that the arithmetic average of the mammary repose period is about 62 days. This value is very close to the desired value of cow breeders. Very high value of the coefficient of variation (57.28%) shows that we are dealing with an average resulting from compensation. This theory is supported by very large difference of about 13 days between arithmetic and probable average of dry period. Probable average is 49 days to 311 registered cows, preceded by a shorter ...

Petri nets is one of mathematical modeling languages for the description of all kind of parallel systems. The new class of P/T Petri multiprocess multinets (PPMM) and its ASYNC-CALL operation are introduced in this article and their base characteristic of the well-formed property is proved. PPMM then generalize the definitions of the bi-relational P/T Petri nets and the P/T Petri process nets and their operators that follows from the base ideas of Petri net processes and their property-preserving Petri net process...

This paper presents an approach of using Augmented Reality (RA) technology for operator training in quality inspection of various large sized metallic products such as pipes, weldings, metal sheets, etc. An Android software application has been developed and implemented using Unity 3D Software Development Package(TM). The proposed application simulates the use of various ultrasonic sensors/probes to train human operators without the need to use the actual expensive inspection equipment. The user manipulates a 3D p...

Small water reservoirs are considered to be an important part of landscape retention capacity. Historically, such reservoirs occupied much more space in the area of present Czech Republic. According to droughts in recent years, the increase of a number of small water reservoirs is considered to be desirable. The identification of profiles suitable for building new small water reservoirs is one of key points in this field as the amount of financial resources is limited. Usually, the identification is done manually ...

Improving diagnostic efficiency of pulmonary diseases is now a very urgent task. For the construction of automated systems of recognition and classification of radiographic images is necessary to perform the process of localization of pathological formations on chest fluorography. The correct choice of the method of segmentation for studying radiographic image segments provides quality and improves the accuracy of diagnostic decisions taken. The article shows a block diagram of a device that implements a method fo...

The aim of the paper is to solve design of the automatic identification system via radiofrequency technology with respect to spatial analysis data acquisition. The compact system of automatic identification at railway defined by GS1 standards enables to monitor motion and operating status at the level of whole trains, wagons or even at the level of individual container or other load. If the acquired data are supplemented by coordinates of places, where they were obtained, those can be used for the spatial analysis...

Paper deals with important aspect of organization and implementation of transport operations and transport processes between points of origin and points of consumption in order to meet requirements of GS1 standards to fulfill supply chain needs. Designed information system (hardware, software and communication features) is installed on each logistic unit (wagon, container etc.). This allows to use extended self AutoID functions for low level data preprocessing. Paper focuses on train composition of both rail and r...

There is known about 57 species of Legionella bacteria which contains at least 79 serogroups. Some of them are considered as a potential human pathogens. Legionella occurs in natural and artificial water environment, especially in technical water supplies. The main cause of infection is an inhalation of aerosol infected by the bacteria. The preliminary research was performed. The main purpose was verification of bacteria from Legionella group occurrence in hot water installations, in public buildings and assessmen...

The aim of this paper was to analyze Bancroft positioning algorithm with comparison to the use of the uncorrelated reference point indicators, and present the results of experimental studies. Comparison of the results was Carried out in MATLAB, the source code is derived and the results are presented. The most popular method for a position determination in GNSS is to use autonomous positioning. This is the basic algorithm used in GPS systems. However users can use other positioning algorithms, depending on what th...

The article presents the fossil fuels combustion effects in terms of the dangers of increasing CO2 concentration in the atmosphere. Based on the bibliography review the negative impact of increased carbon dioxide concentration on the human population is shown in the area of the external environment, particularly in terms of the air pollution and especially the impact on human health. The paper presents biomass as the renewable energy alternative source to fossil fuels. Biomass can be an essential alternative to fo...

In this study, the adsorption behavior of natural zeolites (clinoptilolite) with respect to Cs+ has been studied in order to consider its application to purity radioactive wastewater. The natural zeolite was activated in two steps. In the first step with a 2 M HCl solution and then with 2 M NaOH solution. The natural and the chemical treated zeolite was subjected to FTIR spectroscopy, XRD (X-ray diffraction) and SEM (scanning electron microscopy) and EDX analysis. The batch method and column studies have been empl...

Based on scientific-technical progress in modern period the industry and transport is developed, new technologies are introduced and requests at natural resources are grown. All the above-stated cause worsening of biosphere indicators. Therefore, studying air pollution and radiation background growing tendencies has international, global importance. During last years, in most countries of the world including Georgia worsening of environmental conditions are noted, pollution of atmospheric air and growing radiation...

The research analyses the five-year results of the beach marine litter monitoring programme in Latvia and looks into its potential and applicability as a tool for environmental policy making and promotion of the sustainable coastal management at municipal level. The monitoring programme, based on UNEP methodology, has been established in the year 2012 by the NGO Foundation for Environmental Education Latvia (FEE Latvia) and operates not only as a litter survey initiative as being only one coastal monitoring in the...

Carbonaceous overburden rocks carry a heightened metallogenic potential. The possibility of extraction of valuable metals from natural bitumens and overburden rocks of oil fields is considered. The results of mineralogical and technological researches of samples are presented. The analysis of sample has shown an increased content of valuable microelements in some objects. All samples contain carbon of varying degrees of metamorphism. The fact of simultaneous concentration of carbonaceous rocks by several microelem...

In the last years, turbo-roundabouts replace conventional multi-lane roundabouts with aim to ensure a higher level of traffic safety and capacity. The most important feature of turbo-roundabouts is a spiral course of the circulatory carriageway allowing drivers easily pass through the roundabout from the entry пїЅ circulatory carriageway пїЅ to the exit without a need to change traffic lanes. Despite of an original proposal assuming the physical separation of spiral lanes, in many countries, the lanes are пїЅsepar...

Developing biocomposites materials is a part of the strategy of sustainable development in construction. This paper presents the advantages, the disadvantages and problems, still unclear, to achievement the biocomposites materials, HEMPCRETE type. The most important thing, highlighted by literature regarding the creation and use of this material type, is the extremely low impact with the CO2 pollution, which usually accompany technological manufacturing processes, putting in place and exploitation of construction ...

The goal of study was to develop the method of food biopreparations production based on corn extract and DDGS - liquid waste of starch and ethanol production for usage in food products as acidity regulators instead of very expensive organic acids. Processes of waste bioconversion using Lactobacillus Acidophilus were the basis for biopreparations production. There were developed the modes of cultivation of lactic acid bacteria on nutrient media, the stages of productions were determined, chemical and biochemical co...

Nowadays, the leading place in space industry production materials belongs to reinforced polymers. One of the most popular reinforced polymer in this sector is produced from aramid fibers and epoxy resin as matrix with hot solidification at temperature 160 пїЅ 170 grad. Celsius. Despite the automated winding technology on modern machinery, there is an accumulation of epoxy resin as a waste happens. This paper is devoted to the processes of curing low-viscosity epoxy resin waste under the influence of orthophosphor...

The dominating feedstock for biodiesel production is still a vegetable oil and cost of the oil composes 80-85% of the production costs, therefore the development of the more efficient methods for biofuel production from vegetable oil remains crucial. The transesterification of oil proceeds with the production of side product: glycerol, which cannot be a part of the composition of fuel. Chemical interesterification of oil with alkyl acetate produce a mixture of fatty acid esters and triacetin. Triacetin is a fuel b...