Browse

The correct design of the construction equipment objects and their usage plays an important role in the overall efficiency of the construction with regard to the execution time, the resulting price, performance of workers on the construction site and use of deployment mechanisms. During the construction is the possibility of using alternative sources in the design of construction equipment, which may contribute to the overall efficiency of the construction. The article gives an example how to proposal a suitable t...

Information in the public real estate management is very important. This affects, among others, rational decision-making. Lack of sufficient information may cause that the decisions that have been already taken will be considered as deficient. The scope of required information depends mainly on the stage of the process of real estate management and its purpose. Management processes are entwined with the geodetic service of real estate management. Therefore, there is always a change of information about the land in...

In the process of documenting cultural heritage, traditional techniques have left their place to digital techniques, as their efforts to acquire the right data in the shortest time have developed in technology in recent years.The most common of these techniques is the terrestrial laser scanning technique and the terrestrial photogrammetry technique. In the documentation of cultural heritage, the level at which these methods are used today is quite pleasing. The greatest advantage of these methods is that it enable...

Within the global hydrological cycle, by redistributing the water masses, there are variations of the gravitational field as a result of changing the subsurface density and the atmospheric masses. For the use of gravimetric data in the hydro-geological modeling it is necessary to correct the direct and indirect effect of gravity due to the altitudes at each point on the topographic surface. Also, based on the variation of the gravitational field according to the selected time intervals (monthly, seasonal, yearly),...

The concept of sustainable development has an increasing influence on the implementation of innovative solutions processes. On the other hand, technologies are an important factor driving development, not only economic but also social and ecological. The aim of the article is to present the importance of the creative process during implementation of geothermal water deironing technology for sustainable development. There are many water deironing technologies available on the market. However, only a few of them are...

The use of pneumatic energy in industry as well as in the tertiary system is quite frequent representing 10% of the industrial electricity consumption in the European Union, the life span of compressors being relatively long, namely between 14 and 16 years depending on the installed power. Although the compressed air demand of a coal mine is covered by performant compressors manufactured by well-known producers there still are multiple possibilities to increase their energetic efficiency. The working method is con...

The laser meter of super small rock displacement under the influence of gravitational forces from the moon and the sun allows registering the regular fluctuations in the Earth's crust. These fluctuations provide small difference in the distances between the rocks edges in the two orthogonal directions inside the shaft structure drilled in the rock. Laser-based displacement meter converts the distance change into the increment of the phase difference in the two light beams in the interferometer. The photo detector ...

Industrial waste is a very important environmental problem. It is the result of business activities carried out by man. Waste is practically manufactured at every stage of production and service activities. In many cases, waste includes very dangerous and toxic products that negatively affect the soil, air and water. In Poland about 90% of all waste is industrial waste, coming mainly from mining, metallurgy, power industry, chemical industry, processing industry, food industry and others. This waste causes a very ...

The article presents new data on the impact of dust emissions in cement production of the Open Joint Stock Company "Yakutcement" (Yakutia, Russia) on chemical and microbiological properties and enzymatic activity of frozen forest soils in Central Yakutia. It is established that as the emission source approaches and the dust load increases, significant alkalinization of soils takes place (the pH increases in litter from 7.11 to 8.40, and in humus horizons from 7.05 to 7.75) as a result of the accumulation of free c...

New materials based iron powder, with several addition elements obtained by powder metallurgy. The sample were obtained by compacting of 500 M Pa , obtaining a sampless and sintering in dry hydrogen atmosphere at the different temperatures. The sintered samples were metallographic prepared by polishing in order to investigate the porosity and evaluate the microhardness of individual grain and structural constituents. I am studing the effect of addition elements on Rockwell hardness and microhardness. Hardness is t...

The purpose of this study was to identify the factors of influence in alluvial deposits due to the anchoring of barges in the vicinity of river ports. The problem of analysis was identified at the anchorage of the barges near the Galati Mineral Harbor on the Danube River. The area of the navigable channel located downstream of the mineral port is affected by alluvial deposits. Major problems occur in the summer months, when Danube waters are very low. Analysis of these issues was done with the SolidWorks Flow modu...

The objective of the paper was to emphasize the influence of the biological activity on the structural improvement of the compacted clayey pedogenetic horizons of two Chromic Luvisols, by the organic matter bioturbation. The researches were performed on two Chromic Luvisols from Romanian Plain, where the mean annual temperature is 10.5oC and the mean annual precipitation is 548 mm. The analytical data showed that clay content increased from the top layer of both soil profiles (28.9% in P1, and 29.8% in P2), to Bt ...

The coal gasification process is currently developed as one of clean coal technologies. Gasification is a high-temperature process (above 800 пїЅC) in which the coal reacts with a gasifying agent, e.g. air, oxygen, or water vapor. As a result, under conditions of elevated temperature and pressure, chemical bonds in the molecular structure of coal break up and the mixture of water vapor, oxygen, carbon monoxide, and hydrogen, commonly known as syngas, is produced. The chemical composition of the obtained syngas is ...

B?r?gan Plain, located in south-eastern part of Romania, is bounded in the south and east by the Danube meadow, in the North, by the Siret river lower meadow, in the west, is bounded, on the north to the south, by the Buz?u river meadow, S?rata valley, ObпїЅr?ia Mosti?tei, Pas?rea valley, DпїЅmbovi?a river, and finally the Arge? river meadow, this limit (particularly those starting from the south of C?lm??ui river) overlaps the interference between the forest-steppe and the restricted forest formations. From a cli...

The objective of the study was to increase the solubility of amiodarone hydrochloride by complexation with hydroxypropyl-пїЅ-cyclodextrin. After complexation a cyclodextrin/amiodarone inclusion complex was formed. The use of media containing surfactants is a suitable solubilizing method and as a result, a non-ionic surfactant - Tween 80 and an anionic one - sodium lauryl sulfate have been used. The dissolution profile of amiodarone hydrochloride and that of the inclusion complex, regarding the release of the activ...

Digestate is a liquid residue from anaerobic digestion in biogas plant. Digestate contains a high proportion of mineral nitrogen and other macroelements and microelements necessary to plant growth. Recycling of nutrients contained in digestate back to the soil is considered as the most suitable utilization of digestate. The digestate used in experiment was taken from agriculture biogas plant which uses pig manure and corn silage as input raw materials. This paper presents the results of laboratory pot experiment i...

This work has pursued the accumulation process of aromatic compounds such as esters in three varieties of Romanian native wines from Apoldu de Jos, namely Feteasc? regal?, Feteasc? alb? and Iordana, obtained by fermenting them in a microvinification system, in a bioreactor equipped with temperature sensors for pH and CO2. The pectolytic enzymes Enozym flavors (3g/100 kg) and selected Vinartis ferm yeasts as Saccharomyces cerevisiae strain were used for the alcoholic fermentation. To identify and quantify the ester...

This paper focuses on the influence of the fiber glass functionalization agent on the properties of the polymer composites. Thermoplastic polymers are novelty materials, with special properties, depending on the type of elastomer, the degree and type of functionalization agent of the reinforcing material etc. Thus new impact and flame resistant advanced materials were developed and characterized. The polymers chosen for this study were polyamide (PA), a thermoplastic polymer that has high temperature resistance an...

This paper aims to highlight the production characters of two cultivars of watermelon planted in grafted and in non-grafted culture, starting from the premise that vegetable grafting represents the most common biotechnology for European and Asian countries, where crop rotation is no longer an option and available land is under intense use. The researches were conducted in 2016 at Research - Development Center For Field Crops On Sandy Soils D?buleni пїЅ Romania, under field conditions, on two cultivars of watermelo...

Global warming and climate change are two of the main problems facing the mankind. 70% of cities are dealing with the effects of this phenomenon and nearly all of them are at risk. The larger cities create over 70% of global CO2 emissions and consume 2/3 of the worldпїЅs energy, so the focusing on the solution on global warming is heavily depending on future act in major cities. Urban density presents a greener way to live. Because the concrete surface is expanded not only on horizontal but even on vertical, in th...

The Dolj District is located on Oltenia Plain in the southern part of Getic Plateau. The studied territory which is the northern part of Dolj District is located on the central zone of Oltenia on the high plateau Leu-Rotunda. This area is characterized by varied natural conditions and so is the formation phenomenon of soil. As a result of soil formation factors, within the northern part of Dolj District there were formed soils that have as specific horizon the clayey one, the most encountered being preluvisoils. T...

Two identical hollow fibre membranes used for ultrafiltration as prefiltration stage of water drinking treatment were tested for assessing the efficiency of cleaning, by using hydrodynamic cavitation. Each membrane with outside-in permeate flow direction, and the same molecular weight cut-off (0.097 m) was placed vertically inside glass cylinders. One hollow fiber membrane was subjected tohydrodynamic cavitation and cavitation during backlfushing. For the other membrane no treatment was provided for comparison rea...

The physical properties of salt make excellent conditions to overcome chemical and physical nature of hydrogen. Hence, hydrogen storage in salt caverns is one of the industrial methods except for depleted oil/ gas fields. The hydrogen has the smallest atomic radius in whole periodic table. It can attract the electrons of other atoms very easily which makes it reactive. A good sealing of pipes is a very important issue in underground hydrogen storage in salt domes. The cementing slurry should be pumpable and compat...

The most important problems with a negative impact for Romanian coast, the erosion phenomen, are given by the numerous conflicts between the development of various economic activities and it is necessary to implement a system for preventing the further deterioration of shoreline. Coastal protection systems can be represented by linear structures perpendicular to the shore, called groynes. The groynes trapping sand on the upstream side and in this way, protect the coast behind the sand filet. The protection depends...

The Volga-Ural oil and gas province is one of the oldest oil-producing regions in Russia. The central position in its borders is occupied by Tatarstan, in the territory of which is explored the largest oil deposits of the region. Oil deposits belong to the Devonian sediments, and in a lesser degree to the Carboniferous and Permian deposits. Despite the high degree of research of the region, the origin of oil deposits still one of the most controversial issues. Most researchers consider that the source of oil is th...

Studies by and X-ray microanalysis and the magnetic methods showed the distribution of impurity elements over the scan area. There were identified phases containing copper, nickel and copper, nickel and cobalt and also the inclusions with a high content of copper and nickel. The concentration of individual elements was varied from sample to sample. There are areas highly enriched by iron and sulfur. The presence of native elements indicates a change of a temperature mode of processes of ore formation. The position...

Transmission devices damages such as power lines, transmission pipelines, oil and gas transmission pipelines can be divided into those associated with their construction and the ones which result from their location on the property. Among the second group landscape damages are increasingly often mentioned. What is more, the methodological valuation of such damages is extremely difficult. That difficulty stems from the lack of legal and methodological regulations regarding the aforementioned issue. The valuation st...

According to the requirements of Council Directive 98/83/EC of 3 November 1998 on the quality of water intended for human consumption and Regulation of the Minister of Health of 13 November 2015 on the quality of water intended for human consumption, drinking water should be characterized by the appropriate concentration of selected parameters, i.e. heavy metals. The specified parametric values should not be exceeded not only in water treatment plant, but also on the particular parts of the production cycle and wa...

Mastitis affects not only the health of milk-producing animals, having a direct consequence on the farm profitability, but it also affects the animalsпїЅ well-being. After performing the microbiologic examination of the milk samples coming from cows diagnosed with sub-clinical mastitis, were isolated 9 different species, out of which 7 species of bacteria and 2 species of fungi. The predominant species were those of staphylococci, Staphylococcus intermedius being isolated in 45,45% of the samples. The second speci...

The studies on the effects of winter wheat cultivation technology and spring barley varying degrees of intensity on productivity, carried out in All-Russian Scientific Research Institute of Agriculture and Soil Protection, allowed a detailed analysis of the positive and negative aspects of these technologies usage, and also they let us define that when the intensification indicators increase the productivity of studied crops increases as well, together with simultaneously reducing of productivity varying on years....

This work presents the results of the study of the different content (0-7 wt.% in increment of 1 wt%) effect of bentonite microparticles on the mechanical and barrier properties of gelatin/potato starch/glycerol (90/10/30 wt.%) edible biocomposite films. The biocomposite films are prepared by casting method from film-forming water solution and characterized by thickness, moisture content, transparency, mechanical test at puncturing, water barrier properties and water solubility. Increasing the concentration of ben...

Metal Oxide Varistors are today used for manufacturing state of the art overvoltage protection equipment, at any voltage level, being one of the most common power electronic devices existing on the market. They are widely used because they have a very high non-linear dependence between the applied voltage and the resulting current, and a relatively high energy absorption capability in case of normal overvoltage shocks or even in case of permanent overvoltages. Researches could be carried out both for finding a new...

Pruning is one of the most important agro-technical measures during cultivation of grapes that affects directly in increasing the quantity and quality of grapes and wine. There are no templates to be applied to all lifting systems - forms of crowns, because each variety has different pruning methods.The number of buds left during pruning depends on many factors such as variety, fertile buds, power - vegetative state of the trunk, agrotechnic and cultivation system пїЅ form of the trunk.The number of buds has decis...

Membrane processes used in wastewater treatment are categorized as the best techniques available at this time because it has advantages in terms of quality and costs. The membranes have different properties depending on the obtaining parameters. Their properties can be influenced throughout the membrane fabrication steps: when the polymer solution is prepared, when the polymer solution is applied in form of a thin film and also even after the thin film membrane is removed from the coagulation bath. Some important ...

This study of an alloyed steel with Cr, Mo which has an important content of aluminum (0.9,пїЅ1.2)%, unconventional treated in magnetic field, is attractive because of the increasing of the durability and the wear resistance along with the improvement of the corrosion resistance. Thermo-magnetic treatments applied before the thermo-chemical treatment has consequences such as the improvement of the mechanical properties of this material. The micro-hardness of the superficial layers has been increased after the unco...

Thermal pollution is considered to be one of the physical water pollution types that is caused by dumping of water heated by the units of industrial, thermoelectric and nuclear power stations. This type of pollution is characterised by the increase of water temperature higher than the natural level. At the places where heated water is dumped there are zones with water temperature higher than in the whole reservoir: about + 12пїЅ ? in winter and + 30пїЅ ? in summer. This fact results into the increased amount of or...

Metal Oxide Varistors are today used for manufacturing state of the art overvoltage protection equipment, at any voltage level, being one of the most common power electronic devices existing on the market. They are widely used because they have a very high non-linear dependence between the applied voltage and the resulting current, and a relatively high energy absorption capability in case of normal overvoltage shocks or even in case of permanent overvoltages. Researches could be carried out both for finding a new...

The main purpose of this work was to determine the influence of type of sampling container on a chemical composition changes of geothermal water. Current research conducted on a bottled waters indicated that, from the vessel walls to water stored in a bottle are transferred various pollutants, mainly the elements such as: arsenic, chromium and antimony [1-3]. Waters with a natural high temperature can intensify mentioned process. The experiment was conducted on the samples of geothermal water collected from the PG...

This article presents results of the studies conducted by authors for determining the influence of ultrasounds, used in the intercritical quenching, on the structure of some low carbon and manganese dual-phase steels (0.087% C and 0.511% Mn, respectively 0.101% C and 0.529% Mn). The samples of these steels were heated to temperatures between 760 and 820 ?C (temperatures between the critical points Ac1 and Ac3), for 30 minutes and then quenched in water, water in ultrasonic field with frequency of 40 kHz and water ...

Fruits and flower edible petals rich in polyphenolic compounds, in particular anthocyanins are known for their pharmacological properties. In order to recover high amounts of such biomolecules from their matrix, various extraction conditions should be conducted. In the present paper, flower petals of Hibiscus sabdariffa and fruits of Ribes nigrum were irradiated with UV-C light for different times (10 and 20 minutes) and at different distances (20, 30, 40, 50 and 60 cm) with the objective to study its effect on pl...

Extra-heavy oil is considered as one of alternative energy sources mainly because of reserve potentials, rich in organic compounds and rare transition metals like V and Ni. Extraction from this hydrocarbon resource has always been a challenge due to high oil viscosity and as a result low mobility within porous media. Conventionally the production from extra-heavy oil reservoirs is achieved by thermal methods such as SAGD, CSS, Insitu combustion, etc. However, these techniques do not consider the post productionsпї...

The aim of the article is an example of how to handle the process and visualize data from the sensor SRS in a GIS environment. Spectral Reflactance Sensor (SRS) is a contactless position sensor system manufactured and distributed by Decagon that monitors vegetation cover, and depending on the use of sensors allows for the Normalized Difference Vegetation Index (NDVI) or Photochemical Reflectance Index (PRI). Values of the spectral reflectance are gradually transferred from the field sensor to the PC environment, a...

Dynamic of the degradation processes is a complex issue in the light of the factors that converge to this, which can be direct, of natural origin, as a consequence of climate change or global or local climatic anomalies and are relatively easy to identify, as regards the characteristics of topography, vegetation coverage, soil etc. to which are added indirect factors, predominantly anthropogenic, that acts like a catalyst stimulating the degradation of soil resources and its attributes that sustain life. B?r?gan P...

The problems of environmental protection and ensuring of the necessary level of environmental safety are relevant in a globalized world. In this regard, an achievement of balance between ecology and economy, the formation of "green" economy are a global trend. Sustainable business development, increase its competitiveness and value company growth, in turn, are inextricably linked with the intensity of the environmental activities of the enterprise. The article is devoted to the under-investigated problem the creat...

Chromium is widely used in the form of metal and in the form of compounds. The compounds of Cr(VI) are highly toxic. Therefore, the wastewater containing chromium must be thoroughly cleaned by sorption, extraction, electrochemical and biochemicals methods. Methods based on the reduction of Cr(VI) occupy an important place. A large number of reducing agents, including FeSO4, has been proposed for this. Studies carried out earlier showed that during this reaction a magnetoactive compound is formed. Lignosulfonic aci...

The aim of this paper is to provide new opportunities in geotourism development in пїЅtiavnica mountains area via the new evolving application for tablets and smartphones called пїЅLike meпїЅcreated by the artist Judith Hofland. It is a location based game which leads the user especially through the non familiar trails within the city or town. The proposal is to applicate this videotour not just in urban areas but also in geotouristic localities. Thanks to this interactive videotour tourists could not just explore...

Preservation and liquidation of selected mines is a serious problem of mineral resources sector. It is acknowledged that пїЅdisturbedпїЅ lands lose their value due to such activity, and land reclamation appears to be the most efficient solution for this problem. Not all the sites of mines are subject to unconditional liquidation given the academic and historic-cultural potential what allows considering these territories in a different capacity. The practice of industrial space revitalization by museumification and...

In historical city centers cobbled roadways are currently being used in the reconstructions of roads. Cobbled roadways are being built also in new construction for example parking lots, sidewalks and bike paths. Cobbled aprons are often built around a central island on roundabouts. Elevated transverse thresholds or pillows made of cobblestones are popular as elements for traffic calming in residential urban areas. A prerequisite for perfect function of these cobbled surfaces is the adherence to the correct technol...

Currently in many countries developments of simple 3D building models in cadastre are usually based on information concerning building outlines from a digital cadastral maps and on the number and the average height of floors registered in cadastre (so called пїЅ пїЅ3D Model General FloorпїЅ). If it is possible architectural projections of buildings and premises are used for development of such 3D models. In this variant so called пїЅ3D Model By FloorsпїЅ пїЅ created model must be connected with the state coordinat...

This work is aimed at studying of the kinetics of the cellulose hydrolytic hydrogenation process. In the course of the study, the methodology of the process in a high-pressure reactor under subcritical water conditions in the presence of the optimal synthesised catalyst, 3% Ru based on hypercrosslinked polystyrene MN 270 (Purolite Ltd, UK) (3% Ru/MN 270) was developed. The optimal parameters of the cellulose hydrolytic hydrogenation process were selected: the temperature пїЅ 205 пїЅC, the hydrogen partial pressure...