Browse

Moldavian Plain is a region in Romania, with a high number and a great variety of historical monuments. At the same time, is a regi on who suffered strong transformations in the post post-communist period from all points of view. The present paper aims to e valuate the effects of socio socio- economic and political change changes on heritage sites conservation and to combine these results with the natur al risk assessments in order to obtain a map of Heritage sites at risk in Moldavian Plain. We want to focus on r...

As far as environmental challenges in the world become more serious and cross-cutting, higher environmental education plays an important role in development of sustainable society. The aim of this article is to describe the specification and trends in higher environmental education in the Russian Federation under the ongoing processes of urbanization, anthropogenic impact and changes in demand of the labor market. Besides, some comparisons with overseas universities are given. The paper deals with the changes in e...

A catalogue of fault plane solutions for earthquakes recorded in Romania between 1929 and 2012 is analyzed in order to outline statistical features of the fault plane solutions in correlation with the earthquake-prone areas in Romania. The catalogue contains both groups: crustal earthquakes (h < 50 km) and intermediate-depth earthquakes (h > 50 km), but only the crustal earthquakes are analyzed here. The catalogue covers mostly the area in front of the Carpathians Arc: Moesian Platform, Barlad Depression, North Do...

Amiodarone (AMD) is an antiarrhythmic agent included in the 2nd class according to the biopharmaceutical classification of drug substances. The oral bioavailability of AMD in conventional pharmaceutical formulations exhibits large interindividual variations due to the rapid dealkylation of the molecule to desethylaminodarone (inactive metabolite) and due to low hydrosolubility. The complexation of the drug substance in the central cavity of various kinds of cyclodextrins is one of the most effective methods for op...

Several countries have developed separate strategies for the introduction and development of entrepreneurship education. In turn, the involvement of young people in entrepreneurship has been on the agenda of the European Union since the economic crisis, when in many member countries it was exactly the young people who were most impacted by the narrowing of the labor market and consequently the sharp rise in unemployment. Despite the fact that not all students potentially starting a business will be successful, uns...

The ?20-20-20? program provides a 20% reduction in greenhouse gas emissions (CO2 equivalent) compared to 1990, ie a 20% reduction of the final energy consumption compared to 2005, by increasing of the energy efficiency and increasing the share of renewable sources in the total energy mix to at least 20% until 2020. Starting from this European directive, the authors propose to develop a method of assessing the wear and operating status of hydraulic pumps, rotary hydraulic motors and hydraulic cylinders, without nec...

The article deals with the modeling of the structure that combines virtualization technologies and an e-learning system. It also describes the logical structure of the system under study, static and dynamic models. The most popular learning management systems have a modern website interface of the e-learning course, many necessary features for providing remote e-learning for different categories of users. However, these systems do not involve the use of a virtual application software environment or shell required ...

The glacial lake Kucherla is located in the Altai Mountains at an altitude of 1790 meters above sea level. We use the 112 cm core obtained in March 2018 from the deepest part of the lake (45 m) for the study. In the process of coring, special attention was paid to the preservation of the upper layers of the bottom sediment (water - sediment boundary). Bottom sediments of the lake contain visual layers with a thickness of 1-3 mm. We count the layers using photographs of the optical sections. Counting the layers and...

In terms of the port development, the challenge of our days is to create ecosystems, communities of interest and practices that will do the ports smarter and more attractive. The analysis we have done shows us that, if the port administration wants more efficient traffic management it is possible to achieve only by interlinking the information and communication systems. Nowadays, the possibilities of implementing the own digital systems in order to have a realistic data monitoring and to anticipate the changes, in...

This work presents a mechanical and physical characterization of rock material from different slopes located in the town of Coimbra (Central Portugal) and its adjacent areas. The slopes are designated by numbers from 1 to 7. Slopes 1 and 2 are placed in Lower Jurassic Formations. Slope 1 is composed by marly limestones and marls. Slope 2 is constituted by dolomitic limestone. Lower Cretaceous Sandstones outcrop in Slope 3. Slope 4 is placed in the Finisterra Microplate and Slopes 5, 6 and 7 belong to the ?Schist-G...

Reducing consumers' electricity supply time, reducing downtime in selection of the medium-voltage feeder faulty branch requires that the network be equipped with commanding devices, automation and modern primary switching equipment.The medium voltage automation system will be based on the degree that, each line, contributes to attract sanctions for unplanned interruptions, and by analyzing the causes that determine the interruptions in continuity of electrical energy supply in the past two to three years.The adopt...

Over the last years the appliance of Computed tomography (CT) on lacustrine and marine sediment cores is continuously increasing, since it provides a fast, high resolution and nondestructive technique in the investigation of sediment characteristics. Micromorphological features that are not clear through macroscopic examination of the core, can now be further analyzed through high resolution 3D visualization. The present study aims on the use of this method as a tool for the clarification of different sedimentolog...

The main goal of our work was to define qualitative (geochemical and mineralogical) and quantitative composition of suspensions (solid phases), which originate in the outflows of mine waters into surface streams and significantly affect the quality of their waters and river sediments. The research was implemented on several abandoned mining areas in Slovakia, where Sb, Cu, Fe and Hg were exploited in the past. Mineral phases - mainly oxyhydroxides of Fe, Al and Mn - are transported by surface waters and are conseq...

As a participant of the UI Green Metric World University Ranking Network, the RUDN-University realized a complex of projects on sustainability and environment protection. Currently the university is on the 41th position in the ranking and is a national coordinator of this program in Russia. Among the main directions of the activities are the development of education on sustainability and environmental protection, resource and energy saving projects, research projects of different environmental and sustainability t...

The research was carried out in Tata Valley watershed, Dambovita region, Romania, which is a tributary of the Ialomita river. The objectives of this study were to estimate the annual soil loss by applying remote sensing data and the main data for the Tata Valley watershed and obtain a spatial representation of the results using GIS techniques. The method used to determine the soil erosivity and total eroded soil quantity in Tata Valley watershed, is the RUSLE + GIS technique, adapted to the specific conditions of ...

Monitoring short temporal changes in intra-urban vegetation areas will become very important as the proportion of urban areas continue to increase. Intra-urban variations in vegetation abundance influence environmental conditions by selective reflection and absorption of solar radiation and by sequestration of pollutants. This research investigates the hypothesis that it should be possible to use easily accessible multispectral Landsat 8 images to track intra-urban vegetation, and obtaining sufficient quality info...

Water level, electrical conductivity, dissolved oxygen, oxidation-reduction potential and pH of Suceava River were monitored in 2018 and 2019 in order to assess the upstream-downstream evolution of these parameters and the impact of Suceava City on this river that divides its built area. The measurements were done automatically every hour with two AquaTROLL 500 instruments. This study focuses on analyzing distinct time intervals with typical and atypical fluctuations of the selected parameters as well as on identi...

Air pollution causes plant injury such as burning leaf margins or tips, delayed grown, root damage and premature leaf drop. An increased pollution also influences the leaf water content, the amount of chlorophyll in the plant and the ability to photosynthesize. In this study we have investigated four types of trees in six areas of Galati. Selected areas are scattered throughout the city and have different degrees of pollution. Samples were taken at regular intervals from the start burgeoning until maturity. The tr...

Mud volcanoes occur both on land and oceans, but their occurrence is generally known on limited areas. Many of the European mud volcanoes structures are known from Romania, where their number exceeds 40. The most impressive and famous of the Romanian mud volcanoes are situated near the Buzau town, at Berca, in the Romanian Carpathian bend area. Other Romanian mud volcanoes are situated in the Transylvanian Basin and in the SW part of the country (Banat region). This paper presents the geological setting, including...

Wine has always been a valued commodity, from ancient civilizations, up to current times, both from a quantitative point of view, and a qualitative one. Humans have been cultivating vineyards for thousands of years, with differential success. This has always been dependent on several, mostly natural factors. Even the most resilient varieties of grape vines require some specific conditions to optimally grow, such as climatic factors (including specific growing temperatures, precipitation, sun exposure, number of an...

The interruptions in electrical energy supply are unplanned events, determined by faults of the distribution network?s components, lightning strikes or unauthorized interventions in the distribution networks. Insulation faults, occurring in medium voltage networks, produce transient regimens with overvoltages/ overcurrents of very high values, produce large requests of network, switching equipments, generators and telecommunication systems. Because of this, the neutral point of the secondary transformer in the med...

The use of the trenchless method of laying underground communications is a profitable alternative to the use of open methods. The method of vibro-impact immersion of steel pipes with an open front end into the ground is widely used. Regular cleaning of the pipe from the formed soil core is one of the most important operations in this technology. The parameters of the soil plug (density, linear dimensions) depend on the physical and mechanical properties of the soil in which the work is performed. The purpose of th...

Silver and gold nanoparticles have unique antimicrobial and antifungal properties that make them excellent candidates for applications in nanomedicine, tissue engineering and bio-imaging. Green synthesis of metallic nanoparticles is preferred over conventional chemical routes because is eco-friendly, requires no reducing agents and no toxic chemicals result. In the present research study, one-pot green synthesis of noble metallic nanoparticles, namely silver (AgNPs) and gold (AuNPs) nanoparticles, from aqueous ext...

One of the most important alternatives in sewage sludge ash management is the recovery of essential elements such as phosphorus. Phosphorus is an important element for plants, food supply, human health and industry. Phosphorus is a non-regenerative resource and therefore it is important to find alternative sources to recover phosphorus. Phosphorus recovery as struvite (NH4MgPO4.6H2O) from sewage sludge ash has attracted special attention in the last decade due to the potential to be used as an ecologic fertilizer....

Nowadays a major issue in managing the industrialized/logistic zones is represented by the environment protection. Circular economy or industrial ecology can be a sustainable model. The challenge for the economic actors of the Danube is the promotion of an Eco-friendly mode of transportation. The port administration and port operators should find solutions to implement an industrial ecology regime. Adapting an Eco-innovative solution should contribute on the number of the additional partners and clients. This cont...

In the development of a sustainable society and an active approach to environmental protection, it is essential to focus on building energy efficiency and its increasing. Within the member states of the European Union, the process of increasing the energy performance of buildings is ensured by increasing the requirements for new buildings through legal and technical standards. This process is supported financially by various EU funding programs. One of the useful helpers in spreading awareness of the energy perfor...

More than 50% of the world?s populations live in urban areas, and they emit almost 80% of global carbon dioxide. They are also responsible for 75% of energy consumption in the world. That increases pressure on food, water, and especially energy. These facts imply that there is an urgent need to provide low carbon dioxide level in cities with efficient and renewable energy to foster the growth of the green economy. Therefore, attention should be paid to renewable energy sources such as the Sun and be aware of the p...

The purpose of this research is to analyze the data recorded on instrumented structures in Bucharest and adjacent free-field seismic stations during the last moderate earthquake that occurred on 28th of October 2018 in the Vrancea seismic zone. The earthquake had a 5.5 moment-magnitude, a depth of 147.8 km, and it was felt on a large area of Romania, generating very little damage in Bucharest. In the last five years, the National Institute for Earth Physics has deployed permanent instrumentation (accelerometers) a...

Occurrence of flash floods (floods from intensive short-term rainfall) increased in last few years because of weather changes, mostly on the small catchments. Affected small catchments are characteristic with lack of information about hydrologic data, mostly no gauging and precipitation station are established there (it is impossible to warn inhabitants). Besides that, in Slovakia is common that house building is very close to the stream, therefore is impossible to change somehow river routing, or change the cross...

The goal of this paper is to highlight problems of development modern approaches to design the ecological innovation systems on different levels of organization. There is investigation the role of environmental innovations in solving some ecological and economic problems for providing ecological safety and sustainable development. The functional model of the environmental innovation system has been developed. This model is based on system approach and analysis of innovation process. The unified structure of the gl...

Model for a change of the biosystems states on the grounds of Markov chains is offered in the work. One of the main problems of management of the biosystems states is the study of the mechanisms, which determine dynamic features of the processes, taking place in the natural environment. Therefore, there is a necessity in the development of special methods, allowing to study dynamic properties of natural objects without subjecting them to ruination. Naturally, a mathematical modeling method may satisfy this demand ...

Metro has a number of advantages, which usually have no other means of transport, but due to the many conditions only some cities can afford to have a subway. At the same time, cities that have this transport system make efforts to expand, which is often a consequence of the development of a given city. Proper analysis of the development of a given city, capturing trends and accurate forecasts regarding spatial development and extent in the long-term perspective are one of the necessary steps enabling correct acti...

Frozen fish is the primary raw material used in the industrial preparation of semi-finished ready to eat fish-based products. Ready to eat fish product manufacturers receive frozen fish raw materials from suppliers and defrost it before processing. Such raw materials are commodities; frozen fish are easily transported around the world, can be stored for a long time, and used for further processing as required, evenly distributing the company?s production capacity throughout the year and, thus, optimising costs. No...

Volatile organic compounds produced by industrial activities are harmful to human health and environment, playing an important role in environment quality, but especially in air quality. The main issues raised by presence of volatile organic compounds in the environment are ozone depletion, ozone photochemical formation at ground level, increased global greenhouse effect, carcinogenic effects, toxic and other health problems. The paper presents a case study conducted at an economic operator dealing with treatment ...

A vital role in detecting eye disorders is played by the analysis of the human retina using medical imaging methods. The main objective of this study is to improve the detection of retinal blood vessels by ameliorating the overall quality of non-uniform illumination conditions, removing image artifacts, connecting the broken vessels, and generating accurate segmented retinal vascular systems. A three-stage edge detection framework is proposed. First, image denoising, contrast enhancement, stretched decorrelation a...

The Black Sea is the largest marine anoxic basin in the world, connected with the Mediterranean through the Bosporus Strait, Marmara Sea and Dardanelles Strait. During global ocean low-stands, the Black Sea basin was isolated from the Mediterranean evolving as a fresh-brackish giant water body. In the Late Pliocene ? Pleistocene times, the Black Sea experienced periodic influxes of water from the Caspian Sea through the Manych Corridor. These hydrological changes that occurred in the Black Sea basin had greatly in...

If we create intelligent automated systems, decision support systems, expert systems, and in general knowledge-based systems then the development of the inference mechanism is very important. This mechanism of inference makes it possible to carry out reasoning on the available knowledge and data, to develop recommendations and decisions, to make their justifications and explanations. In this paper, a model of inference in the form of a bipartite graph is considered. The elements of the graph correspond to clauses,...

The methodology ICZM is the modern approach to the realization of the concept of the sustainable development of marine regions. Modern geoinformation systems (GIS) are the optimal means for presentation of spatially distributed data on an electronic cartographic basis. Complex management of the coastal zone region can be organized on the bases of this data?s for analysis, monitoring and management of a marine health resort. The automated information systems of support and of decision-making are the basis for forma...

Satellite images provide a large amount of data necessary for studies and applications related to fields like meteorology, agriculture, surveying, geodynamics, army etc. The complete data combined with complete software for satellite data processing allow us to create a powerful tool that can be used for taking decisions. Adding software that are able to combine different data coming from various areas, you can obtain an indestructible weapon that can provide you information regarding the environmental monitoring ...

The aim of this work is to study the erosion and stability of rock cliffs. The selected sites are located in the Cuio and Kalohanda areas from the southern sector of the Baia-Farta municipality, on the coast of the Province of Benguela, central-western Angola. The fourteen studied sites are situated nearby fishing villages and present two distinct climate seasons: the rainy season and the dry season. The studied area presents a huge potential for economic activity related with tourism. The rock cliffs are mainly c...

In the study, heavy metal concentrations were determined from the Certej creek, basin in surface waters by using inductively coupled plasma emission spectrometry as an analytical method (ICP-OES). In order to assess the toxicity effects, the toxicity of various elements such as ( As, Cd, Cr, Cu, Pb, Ni, Zn etc.) were studied, these elements having an increased toxicity even at low concentrations. The purpose of this work is to determine their concentrations by the inductively coupled plasma emission spectrometry m...

Operations conducted by petroleum industry generate a whole range of drilling waste materials. In oil & gas industry, the most common wastes consist of used oil or water-based drilling fluids, bore dusts, and cuttings. The chemical composition of drilling waste and its toxicity depend primarily on the geological and technological conditions of drilling, the type of drilled rock deposits, type and composition of the spent drilling mud and also on solids control equipment. Sustainable waste management became one of ...

Forest resources are the most significant natural wealth of the state of Latvia. According to the data of the 2nd stage of the forest resource monitoring for 2014, Latvia has 3575 thousand hectares of forest land comprising 55.3 percent of the total territory of Latvia, while the total timber stock estimated at 668 million cubic meters. Each forest stand has a certain amount of undergrowth and understorey ? small dimensions woody plants (shrubs) which is few researched until now. The most precise determination of ...

Here we report immobilization of GOx on magnetic silica: (i) nanoparticles Fe3O4 with silica coating (Fe3O4-SiO2) and (ii) mesoporous silica with incorporated nanoparticles Fe3O4 (SiO2-Fe3O4) functionalized with amino groups using glutaraldehyde as a linker. Magnetic support based biocatalysts demonstrate high catalytic activity in D-glucose oxidation to D-gluconic acid at pH 5-7.5 and temperature of 30-50?C with the best activities of 95% and 94% for SiO2-Fe3O4-GOx and Fe3O4-SiO2-GOx, respectively. A comparison o...

Local or regional forest loss may be considered a forest management problem that mainly affects countries that lack proper forest monitoring and law enforcement procedures. Romania is an appropriate example regarding this matter, the main issue being the massive illegal cuts that are difficult to monitor, record and sanction. Therefore, the desiderata of precluding this outlawed practice and of preserving the forest cover ? which accounts for almost 29% of Romania?s territory (2015), are not attainable without rev...

The article discusses the various ways in which environmental factors influence socioeconomic welfare of individuals in the regions of Russian Federation, with an in-depth look at the regions of Ural Federal District. We use regression analysis to examine the mechanisms of direct influence that environmental factors have on individual welfare indicators, healthcare, social and economic welfare modules, and, finally, on the composite welfare index. We then examine the indirect influence of environmental factors, ma...

There are 15 sites with large deep landslides on Moscow territory. Recently, several of them have been activated, in some cases directly related to human activities. Deep landslides represent the major hazard to urban infrastructure. They have a complex mechanism of development, have a huge mass, and cause big problems in implementation of protection measures. The regularities of the mechanism of deep block landslides are considered in the article. Various points of view on the mechanism of development of deep blo...

The production of electricity and heat is based on a number of fuels, with fossil fuels being the most widely used fuels at present. Electricity is mainly produced by generating steam in boilers for the combustion of sorted fuel and feeding it to the turbine that drives the generator. Combustion plants are operated on demand and energy demand, either as large utility plants or as industrial combustion plants providing power in the form of electricity, mechanical energy, steam or heat for industrial production proc...

As known, all GIS (geographic information system) coordinate systems tied to the dynamic coordinate system. In this paper, the method of determining the orientation of the dynamic coordinate system in relation to the HCRF (Hipparcos Celestial Reference Frame) system is described. The lunar occultation observations (LOO) were used for this purpose. The photoelectric method of recording an LOO that allows obtaining LOO moment with an accuracy up to 0.001s (i.e. 100 times more accurately than by visual method) is the...

Karst poljes represent depressions created in territories made up of limestone and dolomite rocks. Generally, in Albania the karst poljes have multiple origin, thus they have a polygenetic character due to the active activity of tectonics faults, river activity and in some cases of the significant influence of glaciation during the Quaternary period. These shapes are of different sizes, the range of hundreds of meters to several kilometers, while the bottom is flat and with small topographic contrasts. Large-scale...