Browse

Resilience is an essential psychological trait for rescuers, as their work involves responding to emergencies and disasters in challenging and often dangerous environments. In the case of rescuers, resilience enables them to remain calm and focused under pressure, cope with the physical and emotional demands of their job, and recover from the traumatic experiences they may encounter in the course of their work. Rescuers often face a range of stressful and challenging situations, such as working in confined spaces,...

On the way to a climate-neutral Europe and a cleaner planet in general, it is important to rethink energy supply and build a fully integrated energy system within the framework of the European Green Deal. According to research, renewable energies could provide a substantial part of the European energy mix until 2050. In this mix, hydrogen could represent up to 20%, respectively between 20-50% of energy needed in transport and between 5-20% of energy needed in industry. An economy based on renewable hydrogen can si...

This article considers various approaches to developing taxonomies of green projects and focusing on common requirements of countries and regions. The article also analyses the standards of the International Organization for Standardization and evaluates options for applying its key principles, while developing support instruments to catalyse green projects in resource-rich countries, such as BRICS. The research proposes a scientific rationale for systematising incomplete and controversial approaches to evaluation...

Advancements in remote sensing technology have provided excellent opportunities for mapping the seabed and substrates. Pomorie and Nessebar are ideal for combining single-beam sonar, multi-beam sounding, and drone imaging to map seabed forms and substrates. This paper presents the final stage of the "Multidisciplinary study of Burgas Bay - MidBay" Project. The project aims to create a substrate map and identify different seabed forms. Recent systematic studies have shown that the seabed, beach, and shallowest part...

This paper presents an electro-acoustic instrument, used in geophysical (seismic) prospecting, for the reception of sound waves, namely the geophone. The geophone is a transducer which transforms the displacement of the soil particles into electrical signals. The article aims at presenting the functioning of a standard electromagnetic geophone and of the newer geophone models, built using the MEMS (micro-electro mechanical systems) technology. Below, a scheme for amplifying the original signal generated by a SM-24...

In this article, we will present the types of seismic waves, how their collection is performed and their preparation for analysis and processing. Understanding these aspects can help improve in future any stage of the process, by using new hardware and/or software equipment, in continuous development around the world. There are three steps in seismic exploration of the ground. The first one is seismic data acquisition which is done in a specific location, ground or water, using a seismic source. The seismic wave g...

The use of microalgae as carbon sequestrators requires optimization of the cultivation process. Growth curves for three types of microalgae were plotted. The growth was carried out at different temperatures 30 and 35 ? and with initially different concentrations of inoculum 30 and 3% in order to assess the possibility of growing crops at the lowest cost and with a high yield of a useful product. We used 3 strains of microalgae - potential sequestrators. The introduction of the inoculum at a dose of 30% led to an a...

Power grids have been the mainstay of power systems for more than a century, supporting economic activity by bringing power to homes, industry and services. As the transition to green energy advances, the role of electricity will become more important, making power grids even more special to society and economies. The energy sector is going through essential changes such as decarbonization, digitalization, climate change etc. and as a solution, governments, industries and other stakeholders will need to establish ...

Georgia is a mountain country, located in the Caucasus region, where carbonate rocks are frequent and geographically well-distributed across the country. The aim of this paper is to introduce the main results of speleo-geomorphological and geophysical investigation conducted in the southern part of the Askhi Limestone Massif (namely Turchu Limestone Polje). Based on the complex studies, karst forms such as sinkholes and ponors were identified, the width of the Quaternary deposits located on the limestones was dete...

The Discrete Element Method (DEM) serves as a crucial computational tool in studying ice-structure interactions pertinent to offshore marine constructions. The article highlights the significance of DEM in simulating and comprehending the complex dynamics of ice loads on offshore structures. Offshore marine constructions face challenges associated with ice loads, especially in regions prone to icy conditions. DEM, adapted to model ice behavior, offers a micro-scale perspective, representing individual ice particle...

Today's time is characterized by a high degree of globalization and trade borders are both physically and commercially open, and a competitive organization must also take into account factors that were less important in the past. Any company that operates in a market environment is influenced by this environment and to some extent helps to cocreate this environment. The current time in connection with the COVID-19 pandemic and the war conflict in Ukraine represents a difficult test for all business entities. In th...

Strategic management and management in general as well as the form of behavioral management of post-mining landscapes is a very important question of how to meaningfully use brownfields that will arise after the end of fossil fuel extraction. The authors of the presented article focused on these revitalization areas in the form of project management from the perspective of strategies for suitable locations. These localities are very important for the further development of the area, and related to this are the pos...

The fourth industrial revolution is currently underway in the global economy. It affects any company, including those applying green technologies whose main purpose is to reduce climate change, the loss of biodiversity and pollution when performing economic activity. Strategic management of the processes is essential for companies to achieve their main goal in parallel with the efficient use of resources when transitioning to a circular economy. Strategic management improves the company-s ability to solve both env...

In order to reduce the brain drain (outflow of intellectual capital) from the regions and promote a more even population distribution, entrepreneurship development in the regions, and subsequently ensure sustainable development of regions, it is necessary to create and implement business development strategies in the regions and, first of all, to ensure that university graduates stay to live and work in the region. The aim of the research is to find the answer to the question of how to retain graduates in the regi...

An intense seismic activity started in February 2023, close to Targu Jiu city, in the Oltenia region (Romania). The strongest events occurred on 13th and 14th February, the first shock with ML=5.2, and respectively the second shock with ML=5.7. These main shocks were followed by specific seismicity bursts (about 2000 foreshocks were registered). The focal depth of the events ranges from 1 to 20 km, most of them being situated in the 10-20 km depth interval. The area of interest is tectonically complex with various...

The purpose of this paper is to study the effects and risks of climate change in Romania. The research methodology used is based on the analysis and synthesis of information from the climate change literature. The main research method used in the paper is content analysis. The authors of the paper find that climate change is already having many negative consequences on health, environmental and economic issues in Romania, affecting all regions. The importance of publishing this study is to increase and improve the...

Chemical flooding allows for the improvement of oilfield performance after standard waterflooding processes. Chemical EOR methods modify different properties of fluids and/or rock to mobilize the remaining oil. It is expected that the residual oil will be different in properties than conventional. A new technology is presented to study a surfactant-polymer flooding, based on a periodic sampling and measuring properties of oil and water during 15 months. At each sampling date, 2D reservoir model was built to track ...

Cataracts occur frequently in older dogs and can lead to partial or complete vision loss. In the present study, a 10-year-old male German shepherd was presented for eye evaluation because of his complete blindness. The diagnosis was bilateral mature cataracts with multiple iris adhesions to the anterior lens capsule in the right eye. This case report examines the process of performing complicated cataract surgery using phacoemulsification method for the patient's right eye. We began to perform surgery as an uncomp...

Technological devices, which promote animal welfare in livestock farming and contribute to a reduction in environmental impact, have known increasing interest in the European Union (EU). For dairy cows, the contact technologies (sensors) on the body of animals not only facilitate animal welfare, but also support the milk productivity and better quality, thus economic production efficiency. According with available statistical data, showing a boost on productivity, the aim of the present work was to test whether th...

During the European GoldenEye Project Type H2020 Number 869398, three drilling and blasting methods were analyzed in terms of the impact of the works on the environment, the choice of the most optimal scheme from the point of view of rock strength, the reduction of costs and the reduction of the impact of the environment. Here, the environmental footprint of the operation was significantly reduced. Analogous and graphic calculation methods were used using the programs Rhinoceros 3D combined with RhinoTerrain and O...

Building fires threaten not only human lives, property and animals, but also the environment. Their safety can be ensured by installing smoke and heat exhaust ventilation system and sprinkler stable fire extinguishing system. However, these devices can negatively affect each other. The procedure for avoiding this negative interaction is different in countries around the world. The aim of this research was to compare the approaches of selected foreign countries to solving the problem of the negative interaction of ...

The purpose of this paper is to analyse the Carbon Border Adjustment Mechanism (CBAM), as a significant step forward in the testing of good practices in environmental taxation. The main objective of this mechanism is in fact to shift the focus from the mere obtaining of tax revenues towards the achievement of climate objectives. The European Commission has introduced this tool aware of its leading role in the environmental field, aiming to influence the decisions of third countries in the fight against the global ...

Directive 2014/34/EU ATEx regulates the placement on the European market of equipment and technical installations for use in potentially explosive atmospheres. The current work aims to describe the design and use of low current equipment in the development of industrial robots used for the inspection of hard-to-reach areas with explosion hazard. Documentation evaluation and testing of equipment with intrinsic safety -i- type of protection (SR EN 60079-11 Equipment protection by intrinsic safety "i") according the ...

The development of the digital society in the light of the world-s sustainable development is uneven. The intensity of ICT processes for different groups of households varies greatly. The immersion of the population into the digital environment caused by the COVID-19 pandemic in an extreme social situation and self-isolation with the ensuing political, social and economic consequences has not yet been properly studied by the scientists and practitioners. In this regard, it is proposed to analyze the relationship b...

A constantly growing demand for fossil fuels in the world and its contribution to climate changes is putting intense pressure on various energy consumers in different industries. Thus, agricultural producers come under close scrutiny and face a difficult challenge of switching to a sustainable mode of production that would ameliorate detrimental effects on greenhouse gas emissions. This study aims to fill the gap in the literature and contribute to the current body of knowledge by analyzing the consumption of ener...

As the only arctic state in America, Alaska is the least dense in population, while consuming more energy (per capita) than any other state. A quarter of that energy presently is provided for by renewable resources, despite a long standing goal out of the legislature to provide half of the state's domestic energy through renewable energy resources by 2025. Of the non-renewable energy produced in the state, natural gas provides half the energy, primarily for the largest urban area. Most of the state-s crude petrole...

Geomagnetic storms cause disturbances in the Earth's magnetosphere, which differ in their spectral composition at different latitudes. The study of local spectral characteristics, both via remote sensing and ground-based data, provides valuable information on the dynamic processes in the Earth's magnetosphere and the longitudinal propagation of the corresponding disturbances. The local spectral characteristics of the moderate (G2) geomagnetic storm that occurred March 13-14, 2022, are obtained. A time series of da...

Restrictions on the planet's carbon footprint are becoming a motivating measure to limit the use of fossil fuels in the European Union. One of the measures to decarbonize the economy is to reduce the use of hydrocarbon fuels (oil, gas, coal). Increasing the potential for hydrogen use in energy is a key point in the conversion of fuels into energy. How the concentration of hydrogen is reflected in the gas supply is an analysis that the energy sector must consider to determine the safe operation and quality of opera...

Habitat fragmentation is a significant threat to biodiversity conservation and the establishment of protected areas has been proposed as one of the main strategies for mitigating its impacts. Romania has established numerous Natura 2000 sites to protect habitats and species of European importance, but their effectiveness remains unclear. In Romania, the Natura 2000 network was established in 2007. This study aims to evaluate the effectiveness of Sites of Community Importance (SCI), part of Natura 2000 network in R...

Evaluation of explosion-proof protected electrical equipment in scope of certification is extremely important considering the risk of explosion that has to be minimized in order to ensure life safety and health of workers and to prevent damaging of property and the environment, as well as free movement of goods when they meet the essential safety requirements at European level. Electrical equipment that operates in potentially explosive atmosphere, have characteristics specially designed for operation in this area...

Several organizations warn of the increase in temperature and the associated extreme climatic conditions for life on Earth. The aim of this article is to point out the influence of climatic conditions on the development of walnut (Juglans regia L.) in the spring months (11.5. - 18.6.) in the years 2018 - 2019, which were above-normal to temperature-normal (compared to the climatic normal 1991 - 2020) and in the years 2021 - 2022, which were below normal temperatures. The impact of the amount of precipitation was a...

As a member of the European Union, Romania must take measures to reduce CO2 emissions, in order to achieve the objective of Europe becoming the first neutral continent in terms of controlling carbon emissions. The paper analyzes the influence of ventilation systems with heat recovery in the process of dimensioning the heating systems related to buildings, both from the perspective of the calculation of heat requirement for sizing the equipment and the annual energy requirement for charging. The analysis simulates ...

The energy sector is particularly important in the Romanian economy, both in terms of its size and in terms of the impact of developments in this sector on other branches of the economy. Developments in the energy sector, particularly in the electricity sector, also have social implications. As a result, the energy regulation institutions have been heavily involved in this area, using all the instruments at its disposal, both from a competition and a state aid perspective: investigation of possible infringements o...

From a geological point of view, Dobrogea presents a wide variety of rocks specific to all three major petrological categories. Plutonic magmatic rocks are found especially in the Macin Mountains, in the form of granites or granodiorites, rarely diorites. Basaltic volcanic igneous rocks are mainly found in the Niculi?el Hills. Metamorphic rocks outcrop in the South of Tulcea County as Micaschists, on the border with Constan?a County, in the well-known Altan-Tepe mining area, but also isolated, to the Southwest of ...

The main scientific problem to which the study is devoted is to determine the relationship between such aspects of the quality of life of the population as: environmental quality, economic inequality and digitalization of households. The relationship between the three studied areas of household life is dictated by the processes of digital transformation, the formation of a green economy, while the phenomena of population differentiation by income is increasing. Nonparametric correlation coefficients were calculate...

The Dniprovsko-Buzky liman is a semi-enclosed water body located in the lower part of the mouth area (estuary) of the Dnipro and the Pivdennyy Bug. The studied liman is located within a tectonic depression that is characterized by asymmetric slopes. The northern slope of the depression is steeper and characterized by a predominance of positive tectonic movements. The southern slope is very gentle, and negative tectonic movements take place within it. The specified tectonic conditions determine the lithological, mo...

Materials and technical equipment, especially their external parts, are inherently subjected to the electrification process during their use. The electrification process of the materials and external parts of the equipment, especially the non-conductive ones, is responsible for the generation, through specific mechanisms, of significant amounts of electrostatic charges. The electrostatic charges generated as a result of the electrification process on the materials and external parts of the technical equipment used...

Safety culture and the environment are closely linked. In companies, they are very often managed together within the HSE department. In most major industrial accidents that have had a catastrophic impact on the environment one of the causes has been a poor safety culture. The very definition of safety culture originated in the investigation of the Chernobyl nuclear power plant accident in 1986. Another example of an accident caused by a poor safety culture was the Deepwater Horizon oil rig disaster in 2010, which ...

Cyanobacteria are ancient photosynthetic organisms that under certain conditions (high temperature, eutrophication) can grow rapidly and form "cyanobacterial blooms". Very often, these blooms are accompanied by production of cyanotoxins, which in most cases are dangerous to the other organisms. Knowing the producers of cyanotoxins is of utmost importance, especially today when climate change has been shown to increase the frequency of toxic cyanobacterial blooms worldwide. The aim of the present study was to chara...

The aim of the study is to look for ways for applying the principles of sustainable development in spatial planning through approaches that reflect modern trends in the field of ecosystem research, environmental protection and provide an optimal living environment. For this purpose, the regulatory documents for spatial planning in Bulgaria were analyzed, as well as the possibilities for applying within their framework approaches for objective assessment of the ecosystem-s state and their capacity to provide ecosys...

Currently, the food industry accounts for the largest amount of waste, a third of which is waste from the processing of fruits into natural fruit juices, the consumption of which has recently increased significantly due to health problems among the population. The transition to a healthier and more natural lifestyle involves reducing the consumption of soft drinks, which can contain high concentrations of sugars, artificial colors, preservatives, and increasing the production of natural juices. Studies were carrie...

Hydrogen explosions can occur in industrial processes, in laboratories, in hydrogen production and storage processes, or in new combustion processes used in modern transportation. This gas presents a particularly dangerous potential due to its flammability properties. The combustion reaction of this gas mixed with air or oxygen is strongly exothermic, resulting in a rapid increase in temperatures and pressures developed. When these overpressures become too great to be supported by the vessels or enclosures where t...

Even if the total amount of water in the world remains the same, we observe a constant deterioration of water quality, water ecosystems and the surrounding environment of water courses and reservoirs. At the same time, the costs of treatment of surface and underground water for drinking water. For this reason, the pollution limits for wastewater treatment plants of all types are constantly being tightened, which increases the already high costs of their operation and often increases in the increased prices for was...

Organic waste has been discharged into the environment by various industries in a global society. Anaerobic digestion has proven its potential as a waste-to-energy (WTE) technology to produce biogas, which can also replace fossil fuels while accommodating these unwanted wastes. However, there are limitations to anaerobic digestion, such as poor biomethane yield due to limited supply and fluctuations in the composition of the substrates, and an inadequate C/N ratio in the feedstocks. This paper aims to discuss poss...

This study investigated changes in carbon (C) and nitrogen (N) concentrations in the three components of the forest ecosystem (leaves, bark and soil) along an altitudinal gradient in the temperate forests of Romania. The properties and processes within the forest ecosystem are influenced by altitude. The leaves, litter and soil are important in the good development of the ecosystem and in the cycle of the elements. Plants extract the nutrients necessary for life and growth from the soil in which they carry out the...

Many processes involving dusts, suspended or accumulated, have the potential to lead to fire, explosion or decomposition in the presence of oxygen and an ignition source. The risk of dust explosions increases as more and more products take the form of dusts or require the use of dusts during manufacture. In spite of extensive research and development to prevent and mitigate dust explosions in the process industries, this phenomenon continues to represent a constant hazard to industries including manufacturing, usi...

Residues of pesticides and HM, used in bees care or in crop fields, have negative effects on the health of bees and humans and of the antimicrobial properties of the honey. Investigation of HM and pesticides is vital, since the use of chemical solutions has -rise up- significantly. Our aim was to investigate whether the level of contaminants in honey (Fe, Zn, Pb, Cu, Cd, As, using GC/ECD and GF-AAS) and pesticides: ?-HCH, ?-HCH, ? -HCH, aldrin, dieldrin, endrin, DDE, DDD, and DDT, alpha -Endosulfan, carbofuran, pi...

The need for secure and reliable applications will increase due to the growing necessity for sustainably and independently produced energy. For example, the amount of energy generated by individuals at their homes will probably grow fast in the near future so requiring for easy-to-use and precise solutions. To transform and facilitate the processes related to energy sector it is possible to use blockchain technology. The aim of this paper is to evaluate and analyse different areas of blockchain application in the ...

The paper reposts on a comprehensive study of Carbon Dioxide Enhanced Oil Recovery (CO2-EOR), a detailed literature and projects review. In one hand, according to past studies, when injected CO2 and residual oil are miscible (Miscible Displacement), the physical forces holding the two phases apart (Interfacial Tension, IFT) disappears; as CO2 dissolves in the oil, it swells the oil, reducing its viscosity and density. This allows the oil CO2 to displace the oil from the rock pores, pushing it towards a production ...

The Blato River watershed was determined as especially vulnerable to flood hazards zone regarding the developed Bulgarian Flood Risk Management Plans. With regard to the climate change the number of such hazards increases. To prevent and mitigate the consequences various measures are applied in practice. Some of them are connected to the implementation of already existing engineering solutions. But in case of emergency some untypical temporary solutions are also introduced. In line with the detected severe climate...