Browse

Renewable energy is playing an important role in the development of any modern country. Numerous renewable energy sources are now harvested on a large scale with the main purpose to reduce the greenhouse gas emissions and diminish the use of fossil fuels. European Union member states agreed to achieve important quotas of renewable energy in their consumption until 2020 in energy and in transportation. Romania has the legislation aligned with the EU directives, therefore the government has issued specific legislati...

Alkylphenols (APs) are toxic, xenobiotic substances classified as endocrine disruptors, which have a negative effect on the hormonal system of many organisms including humans. APs are among the ubiquitous environmental contaminants and are frequent contaminants in wastewater. Alkylphenols are starting materials for the production of many surfactants and antioxidant stabilizers used in commercial products like detergents, plastics and textiles. They are used in the synthesis of alkylphenol ethoxylates (APEs) and ar...

The present paper uses microsimulation softs to identify the main problems regarding the speed humps location and proposes some improved solutions, with effects on traffic, pollution and safety. This paper also defines the notion of "speed hump", its main advantages, disadvantages and some implementation requests. The most accessible measures to increase road safety, both in economic and design terms, are the traffic calming measures, such as speed humps in different shapes and sizes, low-price solutions with sati...

Petroleum and petroleum products hydrocarbons are the most toxic environmental contaminants. Modern detailed analysis of crude oil is needed for assessment, trasological and forensic investigations. Method of gas chromatography with mass spectrometry (GC/MS) is one of the most effective method for the component composition determination in complex mixtures. This paper describes an express developed methodology for determination of fractional and component composition of crude oil and its derivative products пїЅ di...

Outsourcing and innovations are very sensitive matters for people dealing with agriculture, especially in the case of farmsteads, which are producing safe food. Food should be same and manageable at the same time. There are currently various definitions of safe food, especially in the case of organic food. In order to fulfil this condition, there is a need for closer co-operation between the farmsteads and the entities in the agricultural sector. As consequence of this approach, the notion of outsourcing is beginn...

Sustainability concerns in Romania dates back over 30 years when they agreed on the need to respond to issues raised inexorable deterioration of the natural environment, prevention of worsening ecological imbalances and ensuring ecological balance on Earth. These concerns marks the moment when humanity implicit authority of the country have begun to recognize that environmental problems are inseparable from the welfare and economic processes in general wastewater treatment plant by growing plants is a natural, ine...

In this work, Electron Paramagnetic Resonance (EPR) as an innovative development route was introduced for the following of heavy crude oil oxidation. Moreover, Differential Scanning Calorimetry (DSC) confirmed results that gained by EPR techniques. Herein, we investigated two heavy crude oils based on temperature-dependence initiation process on the kinetics of LTO in the temperature range from room-temperature to 200пїЅC, in the presence of hydropeoxide as an initiator. Without hydroperoxide, the behavior of two ...

We have collected paleomagnetic samples from Late Devonian (Fammennian) basalts and sedimentary redbeds at the Bykovskaya Straight (in the vicinity of Lena River delta). Most studied samples carried interpretable paleomagnetic signal. Three paleomagnetic components have been isolated: A+AпїЅ, C, and D. The magnetization of the overwhelmed majority of Late Devonian samples from the Bykovskaya Straight has been reset by modern (or Late Cenozoic) geomagnetic field (component A+AпїЅ). The sole site was characterized b...

Palladium is one of the precious metals which have great economic importance. It is used in many fields such as electrical and electronic industries, corrosion resistant materials, and jewelry due to their specific physical and chemical properties, catalysts in various chemical processes. Due to its importance and high price, it is essential to develop efficient recovery methods for this element especially from water containing trace amount of Pd. Therefore in this work we report studies regarding the removal of P...

The reef system (carbonate platform) is a geomorphological barrier and a sedimentary and chemical-biological filter in a directed flow of geo-biosphere processes. To carry out lithological and geochemical reconstructions of these processes, an analysis of the change in oxidation-reduction conditions, climate, intake of organic matter type and mineral composition is required. Increased attention to these carbonate platforms is due to the fact that within their boundaries hydrocarbon deposits are discovered, confine...

This article proposes a software tool, based on artificial intelligence technics, to grid operators and energy companies, to optimize the power system. Precisely, it uses pattern recognition capabilities of neural networks, in order to enable a higher share of renewable energy to consumers. The applied analysis on PV power and other related electrical grid data, such as smart energy meter readings, are based on pattern recognition technics. The neural networks used for this approach will identify days of the week ...

Among different methods of oil-crop biomass processing two main reactions are allocated пїЅ oil transesterification with methanol and fatty acid deoxygenation. Last decades there is a growing researcherпїЅs interest to the production of fatty alcohols with carbon number 10-18 by selective hydrogenation of carboxylic group of fatty acids. These alcohols can be used in various fields, e.g. pharmaceutical, cosmetic, fine organic synthesis as well as in biofuel industries. In this work, we propose to use polymeric cat...

Tsunami is one of the major natural hazards presenting significant flood risk for coastal communities and therefore, increasing the society resilience to this phenomena in exposed areas is very important for minimizing damage and possible destructive effects on the environment in these areas. In the frame of the EC Programme-FP7 ASTARTE project (Assessment, STrategy And Risk reduction for Tsunamis in Europe), we conducted a questionnaire survey among people living, working, or visiting Eforie Nord site. The tsunam...

The performance of investment projects and their impact on the beneficiaries represents a real challenge to the public and private entities, from the perspective of all resources involved and expected results, on all fields. The economic efficiency of investment projects, initially considered, by many others, as one of the main criterion in evaluating projects process, cannot be a real guarantee of performance projects. At present is a need completing the process analysis and with other characteristics such as the...

The research goal was to make a dimensional comparison of an average droplet of a fuel spray for two fuel supply methods to a standard fuel injector in diesel engines. The Sauter mean diameter (SMD) and other derived parameters were determined in a selected spray cross-section using Spraytec STP5000 instrument. Apart from determining a mean droplet diameter, the software allows for computing numerous derived parameters. In the first case, W1F-01 fuel injector (opening pressure - 23 MPa) was supplied by a fuel pump...

In recent years, the global economy has become increasingly interested in obtaining energy from renewable sources. This trend is mainly due to the necessity of reducing the negative environmental impact of conventional sources of energy. One of the leaders in making this change is the European Union. Energy policies and electrical systems of EU Member States are increasingly dependent on the development of renewable energy. This also translates to the energy policy of Poland as a member of the EU. In the coming ye...

The studed area, a WNE-ESE cross-section Espinho-LobпїЅo, is located is the westhern boundary of Central Iberian Zone and Ossa Morena Zone, near the NW cost line of Portugal. This is an axial sector of the Iberian Variscan Orogen from which several geodynamic interpretations have been proposed. The aim of this work is a contribution to the petrogenese and variscan evolution of the (meta) igneous and metasedimentary units, constrain by macro, microstructural, petrographic and lithogeochemical data. The metasediment...

Plutonic rocks are quite widespread throughout Anatolia (Turkey) ranging from gabbro to granite and calc-alkaline to alkaline. One of those rocks are located in Kahramanmaras, SE of Anatolia, and named as the Buyukkizilcik intrusive rocks. This area is situated in one of continental blocks of Anatolia, Tauride Belt. The basement of the studied area is composed of Paleozoic-Mesozoic metamorphic rocks and they are cut by the intrusive rocks. In the field these rocks are quite altered. These intrusive rocks are alkal...

The deposit Kokkyia is located in the exocontact zone of granodiorite intrusion, and zones of hydrothermal alteration, which enclose gold mineralization, are controlled by small intrusions of diorite and syenite of the Upper Devonian intrusive complex and are located in volcanic rocks of sour alkali and medium composition. Practically all the difference of rocks are affected by the processes of hydrothermal changes and are shown as the processes of propylitic nature: albitization, feldspathization, chloritization,...

Pore space characterization is an essential element of reservoir characterization, often based on combination of different laboratory techniques. The study concerns mercury injection capillary pressure, low field nuclear magnetic resonance, gas permeability measurements and X-ray diffraction analysis on Miocene sandstones and mudstones. Core samples were taken from several boreholes from the Siedleczka area, which is located in an important gas province of Poland пїЅ the Miocene Carpathian Foredeep Basin (southeas...

The paper deals with plant growth-promoting rhizobacteria and their capacities to boost the efficiency of phytoremediation processes applied on soil polluted by the industry. For this purpose, we chose a locality in the form of decontamination site in Ostrava, where ruderal plants were sampled. Such plants are generally regarded as hyperaccumulating with high production of biomass plants. Their root systems were confirmed for the occurrence of PGPR-bacteria, predominantly of the Pseudomonas genus. The results of t...

The increased vulnerability of the aquatic landscapes of Subarctic of the European part of Russia to anthropogenic impact is a consequence of natural conditions and its geographical location. In this regard, the study of small rivers and their catchments which are remote from the direct influence of the industrial and residential zones is of particular interest to researchers, since they can be considered as background areas of the Subarctic. One of these rivers is Kyanda flowing into the Onega Bay of the White Se...

This paper presents a theoretical and practical approach of the evaluation concept of professional risk specific to activities of gas wells extraction and initial processing. The scientific research highlighted in this article was obtained during INSEMEX Project from The National Program for Research and Development PNCDI-CEEx. The main purpose of evaluating industrial risk is to prevent this type of risk and when there is no possibility to eliminate it, it is mandatory to reduce it up to the amount of residual ri...

The Svetloborsky dunite-clinopyroxenite massif of the Platinum belt of the Urals is almost entirely covered by eluvial-deluvial sediments, which makes it difficult to search for platinum metal mineralization in primary dunites. Lithogeochemical survey of soil-forming eluvial-deluvial sediments was conducted to identify and outline of the platinum anomalies. According to the results of lithogeochemical survey secondary dispersion haloes of palladium, gold, chromium, nickel, cobalt, manganese and other rare elements...

The article is devoted to the study of the polycentric city structure. The large area of the city combined with territorial-functional differentiation, growing interest of the population in recreation, leisure time, family rest, and the desire to attract tourists are all components of the emerging polycentricity of city life. Polycentricity of city structure assumes the formation of not one but several local centers on the basis of socio-ecological functions in combination with economic activities of a post-indust...

Climate change, environment pollution, environmental pressures force all entrepreneurs to implement actions arising from the laws and take additional management initiatives to protect the environment. Environment management system according to ISO 14001 can be a useful tool in this field. Environment management system is a part of the whole enterprise management system that includes organizational structure, planning, distribution of responsibilities and resources needed to develop, implement and lead management t...

Reservoir heterogeneity creates difficulties for every stage of production, the effects being more pronounced when little data is available. This is the case for many old and abandoned Romanian oil reservoirs that have very poor reservoir characterization. This paper discusses the efficiency of two prediction methods, ordinary kriging and artificial neural networks, for porosity as an routine core analysis parameter, with the hope of improving reservoir characterization by creating more accurate distribution maps....

The Zechstein Main Dolomite (Ca2) is one of the largest petroleum bearing formations in Poland. Numerous hydrocarbon deposits occur within Ca2 in the carbonate platform sediments of the Polish part of the Southern Permian Basin. Application of modern methods allows evaluation of porosity and pore size distribution and enhances the proper characterization of reservoir rocks in non-invasive way. The study concerns lowfield Nuclear Magnetic Resonance (NMR) measurements conducted on Ca2 carbonate rocks from P-1 well l...

Reliable estimation of hydrocarbon feedstock reserves is based on determining the reservoir's fluid recoverability, which is done by laboratory studying the microscopic structure of the core samples. Impulse nuclear magnetic resonance relaxometery (NMR) is one of the most perspective methods for studying petrophysical properties of rocks. We developed a portable NMR relaxometer, which can be used both in the laboratory and in the field while drilling. NMR analysis of the drill mud can be done directly on the well ...

Salinity of drilling waste is a serious problem, and it is one of the biggest problems at the stage of selecting drilling waste utilization method. The high salinity of drilling waste results from a few causes, i.e. the use of drilling fluids (inorganic salts are commonly used as drilling fluids components) in the process of drilling, drilling in saline formations and also brine inflowing to the well. The investigations carried out on drilling waste has shown that their soluble salts of alkali metals in the form o...

Russia has a significant bio-energy potential and a large fund of land resources, so there is no competition between the cultivation of bio-energetic crops with basic food ones, as in case of the EU countries. There is a steady trend of further growth of bio-energetic cropпїЅs agroclimatic potential under condition of European part of Russia through the expansion of the agricultural zone to the north and east due to global climate change and the pressing in the agricultural turnover temporarily unused and fallow l...

The paper aims to solve pollution problems mining sites closed on the environmental components. In this regard it is proposed the use of microcontrollers and wireless sensors for warning exceeded limit values of environmental quality indicators. It wants to create a network of wireless sensors to anticipate the amount of pollutants to take measures to reduce pollution in the mining Brad chosen as a case study.

The aim of this paper is to point out to conception of remediation approaches in the mining landscape after ending of mining. Remediation is technically and financially very demanding. According authors of some scientific studies comparing the results of the technical and biological reclamation with a spontaneous succession showed the advantages of spontaneous succession. Therefore the current trend in landscape ecology promotes procedures without technical remediation, which limits the progressive succession. On ...

This research consists of two studies regarding power generation projects. First based upon hard coal and second as joint optimisation of lignite open pit mine and lignite fired power station. Hard coal spreads as fossil fuels combustion competitiveness measure were calculated based on the typical parameters for the Polish hard coal and lignite power stations. Brown spread calculated for lignite power station generally indicates a higher value than the dark spread for hard coal combustion. Spreads value depend on ...

Maximum damage due to strong earthquakes occurs at the resonance between the natural periods of the structure and its site, given by the coincidence (or just close to) of the two periods, in which case the dynamic amplifications can damage, even destroy, the structure. From the recordings of (strong) Vrancea earthquakes one can see a dependence of the site natural periods and peak ground accelerations (PGA) on magnitude. For safe avoidance of the resonance it is necessary to define for each site a natural period v...

Brief Production of electrical power from renewable energy sources presents a chance to: satisfy the societyпїЅs power needs without encumbering the environment with combustion products of, among others, lignite and coal, energy security as well as become independent from traditional energy source suppliers. The aim of this article is to present the methodology used when designing wind farms utilising a group of wind turbines. The article presents the objectives of the European UnionпїЅs policy on renewable energy...

Gemstones inspired people since the very beginnings of humankind due to their esthetic nature and as a symbol of lasting value and social superiority. Precious and decorative stones from the East Kazakhstan Region are known in this area of Central Asia since the early prehistory. The most precious among the Kazakhstan gemstones пїЅ emeralds пїЅ were processed by the factories in the Urals in the 16th-19th Centuries. Among other well-known non-metallic minerals there are sapphires, topazes and tourmalines, mostly o...

Liquefied Natural Gas (LNG) is stored in cryogenic tanks at receiving terminals. During the LNG storage some part of LNG evaporates into gas phase. Evaporated LNG is called Boil off Gas (BOG). Heat flow has an influence on evaporation process. It indicates continuous boil-off of small fraction of LNG due to heat flow from the ambient air through tank insulation. Vaporization process causes changes in the composition of stored LNG. Increased vaporization process may negatively affect the stability and safety of the...

Information regarding activity on the market provides valuable source for the future managerial decisions of each company. They are very important for achieving company strategic goals which represent part of a long-term strategic management concept of the company. Highly-valued information concerns especially the sales and the expenses development. Development of set company's values can be predicted to a certain extent using mathematical methods. Company can adequately respond to its future predicted state of va...

Lake Suturuokha (69'06 "N, 145'23" E) is a unique lake within the Indigirka River basin, which is located on the border of the forest-tundra and taiga in the north of the Republic of Sakha (Yakutia). Formed due to the influence of glaciers of several glaciations in the late Pleistocene, the lake has a large area (69 km2) and comparatively shallow depths (2 - 2.5 m). Because of its unusual genesis and low study, the lake is of great interest to scientists. In August 2015, in the framework of the research expedition...

This paper reports the preparation of novel polymer membranes by phase inversion at room temperature (25 пїЅC), using acrylonitrile, acrylic acid, dimethyl sulfoxide and small amount of medicinal plant extract. We investigated the structure of the resulting membranes through Fourier Transform Infrared (FT-IR) spectroscopy and SEM microscopy. Also was determined the water content. FTIR-ATR spectra show that the peak at 1723 cm-1 shifted to lower wave number when medicinal plant extract (1715 cm-1) is added in the p...

Classic models of fault related folding frequently fails to describe complicated geological structures. The combination of tectonic modelling techniques can be used to reproduce observed geometry of folds. Indirect information contained in geophysical data can provide a good quality check for proposed tectonic models. The Draganowa Anticline is the westernmost part of the Draganowa-Iwonicz Fold. This structure is characterized by existence of very steeply dipping limbs in shallow zone which turns into gentle antic...

The priorities of the state policy of the Russian Federation in the Arctic is determined primarily by the Strategy of development of the Arctic zone of the Russian Federation and national security for the period up to 2020, approved by the President of the Russian Federation. In the framework of the activities of the Russian State Commission on Arctic development a working group "Education and Science" under the leadership of the Ministry of Education and Science of the Russian Federation. This group had analyzed ...

When aiming to study pro-environmental behavior (PEB) developments at the local municipal level in Latvia, there were two complementary studies employed: 1- main local stakeholder groups interviewing in two town municipalities to study their existing PEB practice, especially obstacles and related municipal governance instruments; 2- questionnaire for about 100 Eco-schools (EcoS) coordinators in Latvia to study schools existing PEB practice within school grounds, but especially their orientation towards and collabo...

The article analyzes the necessity of forming a model of environmentally sustainable development. It is determined that the solution of this problem is extremely necessary for Russia. The characteristic of the basic concepts of solving global environmental problems is given. It is determined that the solution of this problem is extremely necessary for Russia. The characteristic of the basic concepts of solving global environmental problems is given. The need is formulated to consider nature as an economic category...

The competitive markets complemented by the concern for resources and environmental protection represent real and actual challenges factors for any organization. The customers call for special attention and organizations integrate the customer-centred approach in their strategies as main vehicle for achieving performance objectives. One of the well-known methods in this matter is referring to the Total Quality concept which supports checking and implementing different quality models needed to improve the competiti...

The main purpose of any socio-economic system is the quality of life of the population. Factor of production is dominant in the regional economy to achieve those goals. Creating conditions for the development of industrial production, is subject to state regulation, including all levels of government. However, responsible for the achievement of the final goal are also enterprises, organizations and citizens themselves. Production potential and quality of life of the population-are directly linked to the level of e...

The intensity of scientific and technical progress is the most important factor in the sustainable development of the economy, its economic and environmental security. In order to increase the intensity of scientific and technological progress in Russia was developed a state program "Development of Science and Technology" for 2013-2020. One of the main tasks of this program is "the formation of a modern material and technical base of the research and development sector." Measurement of the supply of material and t...

The progressing depletion of fossil fuels necessitates the search for renewable sources of energy around the world. The reconstruction of small hydroelectric power stations is an alternative solution for the sustainable generation of energy. The objective of this study was to reconstruct a small hydropower plant in its former location. The average water flow and annual water flow were calculated, and the results were used to design a water turbine with a gear unit and a generator. An Archimedean screw hydroturbine...

Today, sustainable development is related not only to sustainable production issues but also to a sustainable consumption. In the planning document пїЅSustainable Development Strategy of Latvia until 2030пїЅ, special attention is focused on enhancement of ecologically certified and healthy products, thus shaping the image of Latvia as a пїЅgreenпїЅ country by promotion of sustainable eating habits and cultural heritage. To position Latvia as one of the пїЅgreenestпїЅ countries of the EU, the consumers, food produc...