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This paper focuses on the creation of accurate methods for analyzing star catalogues. The method is based on the multifactorial comparison between coordinates and proper motion from the catalogs studied and the Hipparcos Celestial Reference Frame (HCRF). The HCRF system has been considered the astronomical standard by IAU. Therefore, in this paper HCRF is used for assessing the accuracy of modern star catalogues. The method allows the use of different catalogue epochs at the standard equinox. The stellar digital c...

Reverse vending machines (RVM) are a key part of used plastic containers utilization system in Europe and the United States. Waste recognition and sorting in RVM machines can be performed by any of the following procedures: by determining the container material (e.g. using the IR-spectrometer), by recognition of the container type by its shape, or by the barcode identification.[1] These three basic control-procedures make any attempt of the fraud completely impossible. But at the same time, it makes the RVM too ex...

The research is carried out to obtain the connection between the Earth magnetic field data and forest stand indices in Latvian forests. The hypothesis has been examined that magnetic field influences the growth of trees. The research object ? Ogre Region was selected according to the magnetic field deviation's map of Latvia. The data of Earth magnetic field measurements via satellite and the forest taxation indices were used ? there was designed the distribution of forest subquarters in belts of magnetic field rad...

Digitalization in business environment and management processes at the same time entails the need for additional skills to prepare clients and members of society by explaining to them the nature and use of products. Therefore, senior and middle managers have to be not only knowledgeable in their profession and develop the relevant hard skills but also, due to the labour market demand, have to be aware of importance of soft skills? training and understanding. In the process of developing study courses in life scien...

The quality of spatial data plays a crucial role in environmental modelling and management, especially in local scale studies needing a detail mapping of vegetation elements in a mosaic, near-natural landscape. One of the sources of spatial data for such modelling is airborne LiDAR. Although LiDAR-based vegetation and terrain models are often considered accurate, their quality is dependent on the density of the original raw point clouds and the computation algorithm. The aim of this study was to answer a question ...

The main goal of young forest tending is to create suitable forest stands with desired structure of tree species and certain number of trees for ensuring of sufficient growth space. Tending needs to be done both in naturally and artificially regenerated young forest stands by creating composition of forest stand and releasing space for growth of most perspective trees, which is done by removing trees of poor quality and one lagged behind in growth. Thus tending has a great impact on creating productive forest of h...

The article provides current data on the metallogeny of gold in the western part of the Altai-Sayan metallogenic province (southern Siberia), one of the oldest mining regions of Russia. The need in generalization of numerous geological, geophysical, geochemical and metallogenic data, forecast and revelation for new types of overlapping gold mineralization is relevant. The scheme of metallogenic zoning is given. Metallogenic subprovinces and zones are identified, and their geological structure and metallogenic spec...

The water quality assessment on chemical and biological indicators of the Kuibyshev reservoir (Middle Volga, Russia) and the rivers ? tributaries of 1 and 2 orders was carried out. Based on the results of hydrobiological research, modal intervals of the total number of zoobenthos were calculated, as well as the proportion of oligochaetes in the community and the Woodiwiss index. The Woodiwiss index was used as the indicator of water quality on the base of characteristics of benthos community. The method of redunda...

Urban air pollution is caused by a combination of different sources. Their contribution to the air quality must be evaluated based on quite reliable data collected by the optimal net of the monitoring points. Under these conditions, the data on special marker compounds are to be obtained. But the selection of marker compounds and optimal places for control points requires to justify the distribution pathways of the pollutants. Thus, it is necessary to study the mechanisms of the accumulation of marker compounds in...

The key features of good education are productivity and efficiency. At present, there is fragmentation in the study content and study process; too much emphasis is placed on isolated, passive learning and the content of teaching is not sufficiently related to real life situations. In order to introduce more effective education in practice, better professional development is needed. There must be a clear link between the practical needs and the teaching work. An effective education system is important because it de...

Generational conflicts exist because of different needs, goals and values, as well as differences in the expected outcome. Over the course of the century, work has become a means of challenge, while humanity has evolved from a generation of goods to a hyperconsumer society. The purpose of this study is to analyze ways of resolving conflicts for X and Y generation employees to identify differences and understand possible ways to compromise decision making. The tasks of the study are to evaluate these generational d...

Nowadays, according to the current century, the one of speed and information, the way of calculating the volumes of aggregates is desired to be much faster and more accurate in every aspect. The volume designates the property of a body to have three-dimensionality, that is development along three perpendicular axes on which the length, width and height are measured. All three those dimensions are actually length values that define the place which that object occupies in space. The theme of the project is to calcul...

The problems of geodynamic safety assurance in mining are common for many countries with developed mining industries. Considerable results have been achieved in Russia in solving rockburst problem, yet in the last decades this problem is transforming into man-triggered seismicity problem. Induced earthquakes in areas where mines had been flooded, seismic activity in previously safe regions, re-activation of tectonic faults, violent man-triggered earthquakes in open pit operations have been registered. As a matter ...

The calculation of wave height, - length and - period changes which result from trans-formation by currents and bottom are needed when solving engineering problems of sea and river hydraulics. It is possible to carry to number of such problems also a problem of construction and operation of sea channels which has big economic value. Modern sea channels can have width several hundreds of meters and difference of depths on the way to the channel and on an axis of the channel twice and more. Therefore, in calcula-tio...

This paper depicts the early phase of development for an integrated system tailored for emergency response actions and remote sensing. This paper focuses on the support system envisioned as an integrated Unmanned Aerial System (UAS) system that consists of one or more ultralight multifunctional aerial units with a configuration that can be adapted to the nature of the intervention: monitoring, mapping, observation and logistics etc. Starting from wing airfoil and material selection and ending with the experimental...

When teaching in schools, especially in vocational subjects, it is very important to attract and motivate students to work independently, not only to remember important facts, but also to develop their ability to seek new solutions independently. One of the active assistants in achieving this goal can be the active use of information technology that is close to the current young person. In addition, it is essential not only to learn new knowledge in education, but also to educate them towards an active approach to...

Forest tree species monitoring is important for forest management, habitat and biodiversity assessment, as well as carbon cycle estimation. Forest ecosystems provide important services to society, and sustainable management and adapted policies are essential to maintain their ecological and socio-economic functions. For implementing a good sustainable forest management it?s important to know about tree species distribution. To characterize forest was used during the time, field inventories who can provide timely a...

The importance of computers has become very popular, the interaction between man and machine is indispensable every day. People's need and desire to communicate with machines naturally led to the evolution of natural language processing. While progress is being made in this area, it is likely that voice interaction systems will replace most portable and digital devices such as keyboards, card readers, etc. This paper presents the main paradigms for speaker recognition, being one of the most important and needed bi...

The aim of the study was to determine the Cu and Pb content in soil profiles in relation to main responsible factors in vertical distribution: type of soil, pH and mineralogical composition. Were exanimate 34 soil profiles from the industrial area of Craiova City. For each profile was collected bulk samples at different depths (40, 100, 150, 200 and 300 cm). The analytical techniques employed for the investigation of soil and rock samples were Atomic Absorption Spectrometry (AAS) for determination of heavy metals ...

The cause of the explosion is the thermal energy delivered by the flammable/ fuel ignition source. The action of the ignition source on the flammable medium can be direct or indirect. The most common of the direct sources of ignition are open flames and electric and mechanical sparks. These sources release their energy into the environment, which, if it contains flammable substances in appropriate proportions, is initiated. This is followed by a chain of fuel oxidation reactions and by the propagation of a flame f...

Bacillus megaterium is a bacterium that has been used for the industrial production of vitamin B12 (cobalamin), the anti-pernicious anaemia factor. Cobalamin is a modified tetrapyrrole with a cobalt ion coordinated within its macrocycle. Previous findings outline a potential way to develop B. megaterium as a cell factory for cobalamin production using cheap raw materials. In this paper, a novel strategy was implemented to investigate the possibility to use sunflower protein isolates and its enzymatic hydrolysates ...

Despite preventive measures, it is not possible to fully eliminate natural disasters, damages and other undesired events. These may have such negative impacts that might turn into a crisis situation. Provided the crisis situation occurs, it is necessary to have an effective system and tools of crisis management. The activity of crisis management represents the solution to the crisis situation using specific principles, procedures and methods aiming at overcoming or minimizing the negative impacts and renewing part...

One of the complicating factors in oil production is the deposition paraffin, as a result of which the production well rate is decreasing and the Electric submersible pump failure occurs. The main factors influencing the intensity of paraffin formation are: downhole temperature, gas evolution, hydrocarbon composition in each phase of the mixture, high viscosity of oil, change in the velocity of the gas-liquid mixture. To solve problems, the thermal method is used, which consists in artificial increase of the well ...

The objective studied is a collective dwelling with the height regime of S + P + 3E and offices located on Str. Borhanci, Cluj County. From a geometric point of view, topographic surveying works ensure the application of various types of constructions, ways of communication, art works, hydrotechnical works on the ground. In our case, the execution of the tracing works was accomplished by moving from the upper to the lower order, from the geodetic state to the tracing base. An essential factor was the choice of the...

The global economy needs significant changes that will reduce the high consumption of natural resources and the amount of waste generated. The idea of solving the circular economy proposes a path to solve such problems. Thematically, it covers social, political, economic and production issues. However, it should be noted that Circular Economy is not a ready recipe for solving the problems of depleting raw materials and the deteriorating condition of the environment. The basic premise of Circular Economy is a simpl...

Digital ecosystems represent a new technology capable of interconnecting heterogeneous, cross-domain platforms, able to drive innovation in different industries, enabling us to connect and operate with a wide range of actors, customers, partners, companies. Digital ecosystems can be considered as socio-technical clusters of adaptive applications with different levels of context awareness, adaptability and autonomicity. The adaptive properties of an organism are closely related to the self-organizing property and t...

SF6 insulating installations are today the most performing technical solution applied to high voltage devices such as circuit-breakers and surge arresters. This gas is used due to a lot of excellent insulating properties. These properties are depending on many variables, one of them is electrodes? geometry and material. Generally, when studding the dielectric breakthrough process, ideal electrode surfaces are taken in consideration. But many experimental results, different than theoretical ones, could be a consequ...

The main idea of this paper is to develop a multi-agent system, integrating advanced control algorithms and acting scenarios, for optimizing energy management in an intelligent microgrid. In order to achieve this objective, it is proposed a flexible intelligent tool based on multi-agents, able to give alternatives for action to prosumers, through a specialized interface. In this respect, firstly are presented aspects related to the multi- agents (MAS) integration in smart grids? control. In the second part the wor...

Unglazed transpired solar collectors (UTC) are simple and effective devices for applications such air heating, induced ventilation, crop drying etc. A numerical model for typical unglazed transpired collector is proposed with blackened plate exposed to the sun and circular holes on square pitch arrangement in no wind working conditions. The steady-state conservation of mass equation, momentum and energy equations were considered in order compute the air pressure and velocities, flow pattern and the total air heati...

In this paper, a pipeline implementing a multi-scale approach that can be used for modelling different steps of aerogel production is presented. Closely integrated modules for aerogel structures generation, properties prediction and adsorption, diffusion and chromatography processes modelling provide various options for systematic and comprehensive study of aerogels by performing computational experiments, which allows to reduce number of laboratory experiments. The results of pipeline validation are presented for...

As a basic component of the environment, the air, vitally contributes to life maintenance and society development, through its physical and chemical properties. Thus, studying air quality, as the main factor for the living world?s progress, becomes a topical issue. Therefore, this paper proposes a detailed analysis of Botosani Town air quality. The analysis was obtained following a statistical processing of open-source data, for the year 2017, provided by the County Environmental Protection Agency and the National...

In all industrial branches, the last period is under the sign of economic progress, but with the lowest energy consumption and the lowest possible release of pollutants. Technologically, therefore, the removal of polluting technologies and the introduction of new "environmentally friendly" technologies are being sought. Thus, the new industrial trend is to reduce the use of molded or forged semi finished products and the introduction of cold rolled semi finished products or other processes. This transformation can...

Facilities and technical systems used in coal mines have limited durability. This is the result of very difficult conditions in which they are used. In particular it applies to environmental conditions and not entirely predictable load states of these facilities. Mining machines and devices are also exposed to various types of hazards, which in many cases significantly reduce their durability. For this reason, it is very important to properly use them and supervise and monitor their work. In this respect, huge res...

The aim of the present work is to develop a fractal method for space maps analysis. Although there are accurate theories of lunar motion in the dynamic coordinate system based on lunar laser ranging and space measurements with an accuracy up to multiarcseconds, analysis of various models of the lunar figure is a complicated problem. The reason for it is that the determination of a reference system for coordinate data and assessing its authenticity are difficult. In order to solve the problem, a comparative method,...

In the recent years, the climate changes have determined the increase of the frequency of flood, and concurrently, negative effects of these weather phenomena were amplified by other factors (the deforestation, needs of the hydro technical works, etc.). Atmospheric precipitation contributes to formation of superficial runoff, or accumulates in the snow in the winter, sometimes participating during melting to form the maximum runoff. The consequences of this rainfall can be serious in terms of erosion and soil wash...

River flash floods and floods are natural events, which are part of the normal regime of the water leakage of a fluvial organism. Depending on the generating causes, they have a different size and a certain frequency of occurrence in time. The target area of the present study is the Sireasa area in the Danube Delta. In that place, a breakage may occur any time in the defensive dam surrounding the enclosure. This is due to the phenomenon of settlement traveled over time, or due to the possibility of occurrence of t...

For to determinate the DNA content and analysis of cell distribution in different phases of the cell cycle, flow cytometry was used. The exact measurements of a large number of nuclei by flow cytometry, fluorescently labeled by passing a laser beam (excitation), which marks each individual nucleus by fluorescence, allows a rapid estimation of the relative nuclear content of the DNA of the analyzed plants . Approximately 0.5 cm2 of foliar tissue is harvested, crushed very well, followed by incubation of the sample ...

For to determinate the DNA content and analysis of cell distribution in different phases of the cell cycle, flow cytometry was used. The exact measurements of a large number of nuclei by flow cytometry, fluorescently labeled by passing a laser beam (excitation), which marks each individual nucleus by fluorescence, allows a rapid estimation of the relative nuclear content of the DNA of the analyzed plants . Approximately 0.5 cm2 of foliar tissue is harvested, crushed very well, followed by incubation of the sample ...

For processing observations of the terrestrial pole dynamics, the regression dynamic modeling (RDM) approach was used. With the RDM software package the models describing the dynamics of the terrestrial polar coordinates were built. This approach provides accurate combined models of observations which describe to some extent causal and deterministic communication and provide forecast of characteristics. A comparison of observations and predicted values of the terrestrial polar coordinates obtained with the RDM app...

The issue of renewable energy represents an extremely important topic, both as regards Romania, as well as at a worldwide level. From this perspective, this work presents an analysis tool for the investment opportunities in this sector. On the other hand, it tends to clarify some issues related to the concept of renewable energy. From this perspective, the objective of this paper is to conduct a study through which an analysis will be presented related to the wind action on the wind turbines located in the Fantane...

Because of the limited resources of water and increasing demand for it, solutions for wastewater recycling and reuse have become of great interest. Wastewater can be recycled for the same purpose or can be reused for other purpose, but first it must to be treated. In this paper some scenarios of using Sequential Batch Reactors treatment of wastewater were investigated with the purpose of reusing or recycling in small-sized residences like chalets or guest houses. Simulations were done using BioWin, which is a powe...

Copernicus is a European Union programme designed to provide a service in delivering free, openly accessible data about the Earth?s surface through satellite and in-situ observations. On the other hand, Landsat represents the world?s longest standing continuously acquired collection of space-based, moderate-resolution, land remote sensing data for those working in agriculture, geology, forestry, regional planning, education, mapping, and global change research. Although the images of these satellite systems are ch...

Lazy Bledowskie well field located in the area of the Upper Silesia, was established in 1959. It consisted of max. 22 wells abstracting water from the Triassic carbonate aquifer (Olkusz-Zawiercie major aquifer). This aquifer is additionally heavily drained by Zn-Pb ore mines. Due to the decreasing demand for water and the deterioration of its quality, wells were gradually excluded from operation and liquidated. Currently, only 2 wells are exploited, pumping approx. 11500 m3 /d. As a result of the overlapping impac...

Machine learning covers a wide set of supervised and unsupervised algorithms for solving prediction, classification and anomaly detection problems. One of the areas of their applications is for customer churn prediction. To build a model for predicting the switching of customers, data scientists use different demographics, social, transactional, behavioural metrics and features. At the same time, most of the small Bulgarian companies still don?t have the needed versatile and complete customer data. They rely mainl...

The article presents practical problems related to the application of REACH and LCA standards in the construction sector. Chemicals are an essential factor in assessing and managing of all kinds of risk due to their importance as components of materials and their various effects, such as: adverse and beneficial, biophysical and socio-economic. The process of reducing of adverse environmental impact of construction sector on the environment is a subject of increasing attention of scientists and companies. It should...

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. The purpose of this paper is to present aspects regarding the importance of thermal endurance tests performed on the electrical equipment ...

The documents of the general cadastre may result from the centralized and selective take over of the data and all the cadastral records from the specialized cadastre, regarding the immovable assets that are their object of activity. These selectively taken elements use to update the general cadastre after the end of its introduction into an administrative territory. One of the main steps for completing the general cadastre is the realization of the real estate cadastre. This article presents the way in which the d...

The research carried out in the present paper aimed at monitoring and evaluating the technological process of obtaining the ecological cheese type ?PETROVA?, in the Maramures county area, Romania. To achieve this raw milk originating from domestic producers was evaluated in terms of fat content, acidity and density of this. After the final ecological cheese type product has been obtained, analyzes have been made for it?s physicochemical evaluation as follows: water content analysis, fat content analysis, salt cont...

The research carried out in the present paper aimed at monitoring and evaluating the technological process of obtaining the ecological cheese type ?PETROVA?, in the Maramures county area, Romania. To achieve this raw milk originating from domestic producers was evaluated in terms of fat content, acidity and density of this. After the final ecological cheese type product has been obtained, analyzes have been made for it?s physicochemical evaluation as follows: water content analysis, fat content analysis, salt cont...

The research carried out in this paper aimed to evaluate five types of beer throughout the technological flow of their production. The technological flow of producing the five types of beer has been monitored at all stages of it, starting with beer must, beer before filtering, BBT beer and bottled beer. To achieve this goal, the following physicochemical analyzes were carried out: color analysis expressed in EBC units, pH analysis, determination of bitter substances expressed in units of B.U. All the results obtai...