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The universities in Bulgaria operate in a very dynamic environment. The Ministry of Education and Science (MES) changes annually the requirements that their systems must meet. Changes can be small and affect only parts of the information systems in use or impose fundamental changes. To cope with this challenge, each university has a choice - either to move to a high level of digitalization or to maintain a minimum digitization of processes, so that no correction is needed in them, thus increasing the hours of work...

Most modern software systems use dozens of traffic types, which leads to the transmission of large volumes of data of three main types via communication channels: audio, video, and computer data. Such software systems are built on the basis of multiservice computer networks in which all data is transmitted over a single communication channel, which makes it possible to use common standards and simplifies the construction of a network capable of serving a large number of users. Thanks to these features, multiservic...

Modern unmanned aerial vehicles (UAVs) are used to perform a wide range of flight tasks (military and civil), implemented both in autonomous flight mode and by remote control. One of the advanced technologies for their use is the organization of flying sensor networks (FSN). The quality of information exchange in FSN, widely used for monitoring of various natural and technical objects, depends significantly on the conditions of signal propagation and the level of external interference. A promising method for impro...

The aim of the article is to identify, analyze and evaluate the scientific problem of the communication interface of workplaces for air traffic controllers in training in the training facility TU / LF Kosice, especially in process and radar air traffic control, in the context of instructor-student and pseudopilot communication within the planned set of specific LETVIS workplaces. The formulation and description of a scientific problem will enable the determination of a methodology for researching the issue by scie...

The article deals with the issue of accidents associated with hazardous substances, their prevention. Modeling of these accidents was chosen as a form of prevention. The production of dangerous toxic substances is currently growing, especially in the industry. The response to this trend is to introduce safer technological processes and preventive measures. These measures serve to prevent or at least reduce the risk of accidents and thus the escape of dangerous substances. To implement prevention, effective measure...

The heat transfer from the source of initiation to the adjacent surfaces is a physical phenomenon worth considering in the process of analyzing the fire. This complex phenomenon describes how the transport, exchange, and redistribution of the thermal energy are carried out and is based on the theoretical knowledge that describes the initiation and fire evolution in time. Flames transfer heat from nearby surfaces through two physical processes, convection, and radiation. A third mode of heat transfer is conduction,...

The article builds on scientific work, which in the framework of the in-the-go analysis has identified a practice-making problem for the performance of air rescue services in the field, with an emphasis on the network of landing areas, their information (technical) security and the risks associated with the decision-making process for conducting the flight under minimum time disposition conditions for the safe achievement of the landing area and the rescue helicopter landing itself on the selected area. The emerge...

In this paper we propose the criteria of an information model that will allow, based on input expert data, to derive a risk assessment of unmanned aerial vehicle (UAV) flights for mountainous environmental studies. To create an information model, it is necessary to develop a mathematical model of risk assessment and informative content of the model within the framework of the problem under study. For the model input, there is a space of mountainous terrain for which we define set of criteria as a threat to safety ...

The Analytic Hierarchy Process (AHP) is considered a flexible and efficient mathematical tool in approaching the complex decision processes. The AHP method allows the reduction of the complex decisions to comparisons by pairs and, finally, to the synthesis of the results, contributing to the capture of the subjective and objective aspects of the decision. Also, the AHP method allows the check of the coherence for the evaluations made by the decision makers, thus leading to the reduction of the prejudices in the de...

The paper presents a mobile GIS technology for monitoring spatially distributed emergencies. Mobile GIS technology is a combination of hardware, software and information tools that provide cartographic modeling, integrated representation of geographic and attribute data, as well as the collection, storage and analysis of geospatial information. Mobile GIS technology is designed to solve the problems of monitoring the natural and man-made environment, as well as forecasting the processes of emergence and developmen...

The article deals with development of virtual tours to memorable places associated with the residency and activities of famous personalities of Russia using specialized equipment (Insta360 Pro panoramic camera with "fish-eye" lenses with the viewing angle of 200° and 3DVista Virtual Tour Pro software). When creating virtual tours, it was made possible to move from one time period (present time) to earlier historic periods for a memorial place under study, which allows user to independently conduct visual analysis ...

In this paper, a computational method to predict the corrosion resistance of some sintered iron alloys subjected to a thermochemical treatment is analyzed. The proposed materials are obtained by powder metallurgy (P/M) route. The raw materials are prepared from atomized pre-alloyed iron base powders. The compacted samples were obtained by cold pressing using conventional route. The powders were compacted at a pressures of 400 and 600 MPa. After pressing, the green compacts were sintered in a laboratory furnace. Th...

Scientific and technological development is an important requirement to ensure the development of geodesic and cartographic fields. At the same time, science and technology have also been identified as key in socio-economic development in the context of the world applying the great achievements of the Industrial Revolution 4.0. Technological changes in measurement and mapping such as satellite positioning technology, digital technology, network technology, etc. have been changing methods of receiving, processing i...

Currently every day the need for obtaining information from satellites and quadcopters is increasing. Various services and ordinary users have a need for automated processing of received information from satellites. However, automated processing raises a number of problems: different illumination of objects, their difference in different times for example at different times of the year, soil changes, river spills and forests before and after fires etc. However, topology allows you to preserve the shape of feature ...

Currently, information technologies used for emergency management are a set of separate local processes that have a narrowly specialized focus. Often they are not integrated into a single management system and do not have information interaction. Integration of information technologies into a single management system will create a single information environment that combines the resources of various systems for the purpose of operational processing of information about emergencies and response coordination. The pa...

The capabilities of existing intelligent decision-making systems are very limited, so for the successful solution of a wide class of tasks based on unmanned aerial vehicles (UAVs) reliable communication with the group of aircraft is required. For communication between individual UAVs, as well as UAVs with a ground station, Flying Ad Hoc Networks (FANET) and flying sensor networks (FSN) are used. Known works devoted to the development and research of such networks consider predominantly radio communication at the p...

Currently there are many spatial structures for storing information about raster and vector maps. There are many algorithms for calculating map information, each of which is applicable to a specific industry. Now there is a problem of the lack of a universal algorithm for obtaining information about the maps, which will allow you to store its scale, time of image creation, deformation, various rotations and other topological features of objects in the images. The article sets the task of developing a method for ex...

The article presents a novel research project aimed at analysis of historical processes at memorable places of the Tambov region associated with prominent Russian personalities using original technologies for analysis, data processing and creation of virtual reconstructions of cultural and historical heritage. It includes: development of the technology for creating 3D models of cultural heritage objects for virtual reconstruction of historically significant territories; development of the technology for analysis o...

The article deals with the development of geoinformatics procedures accelerating and simplifying the application of the scattering model SYMOS?97 (Gaussian model), for selected pollutants in the open air to an area with a large number of sources and reference points. They are compared here with real measured concentrations of these persistent organic pollutants. One of the chapters illustrates the spatial and temporal variability of the ratios of the contributions of individual resource sectors to the total air po...

In the early decades of the 21st century, the world faced with an active development of information technologies, which is accompanied by an instant change of network protocols. Nowadays it is difficult to imagine the information infrastructure of a modern company without complexes of accounting programs, decision-making support, expert systems, knowledge bases, etc. All of them need reliable and high-quality engineering support. With the growth of information needs of society, the requirements for the quality of ...

P colonies (see [2]) are a well-established version of the P systems (see [3]), the computational device based on membrane computing. One branch of the research of the P-colonies focuses on the possibility to consider the two-dimensional environment, in which the agents act, and the 2D P colonies (see [1]) were introduced. 2D P colonies showed to be suitable for the simulations of various (not only) multi-agent systems, and natural phenomena, like the flash floods. The Grey wolf algorithm (see [4]) is the optimiza...

The solution of the gravity direct problems performs a crucial impact on the results of investigation of the gravity anomalies in oil and gas fields. The direct problem of gravimetry itself means that we have to determine the analytical characteristics of the gravitational field from a set of specified parameters of the geological medium (such as an average depth, an excess density, coordinates of anomaly sources, and other medium parameters). Evaluation of the distribution of similar parameters of anomalous bodie...

Based on the overview of existing industrial safety technologies and new electronic components on the market, the Concept outlines the new requirements to key segments and sub-systems of the System for personnel and mobile machinery positioning in mines. The concept of the system?s functioning is focused on building a highly robust fail proof adaptive system for data collection, processing, transmission and display, as well as for process management. The system for positioning of personnel and mobile machinery in ...

It is well known that the process of inference is generally non-deterministic. Therefore, to develop effective inference algorithms, the problem of managing the inference search is very relevant. The solution to this problem is complicated by the fact that the predicate calculus is unsolvable. There is no method for establishing general validity or its absence for an arbitrary formula for calculating predicates. Nevertheless, if the formula for calculating predicates is valid, then there is a procedure for establi...

A professional aviation meteorological service has been established in the territory of the Slovak Republic, the stations of which are unevenly distributed and do not cover the whole territory of Slovakia for information purposes. The addition of meteorological stations, whether mobile or installed at general aviation airports, would largely eliminate the occurrence of such "gray zones" without information coverage. Inexpensive meteorological stations installed at general aviation airports will help to solve the m...

The report presents the results of studies of the characteristics of the deformation signal during the preparation of regional earthquakes according to laser deformation measurements in the adit of the Talaya seismic station (Baikal region). Studies have shown a number of features during the deformation process on the eve of regional earthquakes. The deformation data recorded on the seismic station (? = 51°40`48``N, ? = 103°38`24``E) during the period from 1994 to 2015 were used as experimental material. During th...

The aim of this article is to create a risk analysis of selected school facilities which can be an auxiliary tool of security solutions against terrorism. Most terrorist attacks are focused on so-called soft targets - crowded places, which are not secure against violent attacks. Furthermore, attacks on school facilities abroad are frequent too. A wellprepared risk analysis is a necessary method to detect weaknesses and strengths of the security of a soft target. The university in Zlin in the Czech Republic was cho...

The paper presents our findings during the adoption of e-learning in the National Geoinformation Center of Bulgaria (NGIC). It details the approach used to build a set of functionalities that produce and deliver online educational products to the customers of NGIC. The Center is a consortium of the national providers of Earth observation data with a purpose to design and co-develop integrated information products. NGIC's information system is being developed since 2019. It is built adopting the IT service manageme...

In the precursory section of the paper, the authors succinctly present the Black Sea basin's oceanographic features with a focus on factors that can lead to naval accidents. The Black Sea basin is characterized, especially in winter months, by sudden storms, big waves, and winds, seriously affecting the ships and crews' safety. The said basin has also confined areas with pleasure crafts and commercial ships, offshore platforms with accompanying auxiliary fleet and underwater pipes and installations or shallow wate...

Continuous measurements of deformations of the Earth's crust make it possible to record changes in their character in several characteristic parameters. Such parameters include the amplitude, phase, and frequency of periodic oscillations, for each characteristic frequency separately, as well as random typical or atypical artifacts. All this information with proper processing can be used for various purposes, one of the most important tasks in this case is to reliably identify earthquake precursors. These studies r...

In today's world, shopping represents a significant part of everyone's life. The interaction between the customer and store staff has grown to be more critical than ever. To facilitate a pleasant and engaging shopping experience, we acknowledge a market gap and a real competition for developing innovative tools that can be used by both parties: the customers, which need their requirements fulfilled, and the store staff, that can use these tools to satisfy customers' needs further by targeting the correct audience....

Currently, particular attention is paid to the study of connection between geophysical phenomena and technogenic processes. At the same time, the structural parameters of the Earth?s internal structure and its core, change in natural characteristics of water basins as well as dynamics of oil and gas deposits are being investigated. This paper describes a new method for studying geophysical phenomena depending on the state of large water basins. With this purpose, we conducted a correlation analysis between astrome...

Geodynamic processes and seismic activity are considered to be the prime driver of horizontal and vertical movements of the Earth's crust in the Balkan Peninsula. One proven method for continuous monitoring of ground deformations is the use of data from active radar remote sensing. These data are the basis for the creation of interferometric images (IFIs) for quantitatively assessment the recorded ground movements of the Earths? surface within a fixed time interval. For this research a set of IFIs were created for...

The data warehouse in the information system is intended to reflect the changing part of the domain model. In classical information systems, this part includes data values, and the storage, implemented as a database, and the system itself can be considered static in time objects. Modern conditions for the functioning of information systems are characterized by the requirement for the possibility of modifying the functionality of the system at the stage of its operation. In this regard, not only data values, but al...

The article presents methodological approaches to the improvement of the environmental monitoring system. To increase the objectivity and to improve the visual aspects of data presentation during ecological monitoring, the authors proposed to involve remote sensing methods of the Earth and geoinformation technologies. The presented set of methods is effectively used for general, operational and background monitoring. The authors have developed an algorithm for monitoring the state of ecosystem components by remote...

The aim of the presented paper is to give a review of the classification of atherosclerotic plaques between two different input values; using computer image analysis and a visual assessment by an experienced sonographer. In the case of computer analysis, the echogenicity index (Echo-Index) is used. In the case of visual assessment, echogenicity of the plaques have been evaluated from histological patterns. In the case of computer image analysis, B-images have been processed. To computer image analysis, our develop...

This work aims at the creation of digital selenographic satellite maps (DSSM) using fractal geometry and multi-parameter harmonic analysis. The observational data for DSSM were produced by the ?Clementine?, ?Kaguya? and ?LRO? space missions. An electronic database on altimetry measurements was built and they were brought into the single reference system by robust modeling. Based on the produced data and the method of multi-parameter harmonic analysis, we developed a digital selenographic satellite map covering the...

Following the international procedures, aviation professionals are required to prove very high psychological and physical standards. There are plenty of factors which might affect a performance of aviation employees. A working environment of aviation personnel is constantly changing, and this variability of their tasks escalates a lot of stress, which further affect safety and quality of flights. There are a lot of stress relieving techniques exercised by pilots, prior they take off. Some of them are selfregulator...

One of the main processes of functioning of digital measuring systems is image analysis. For photogrammetric systems, such tasks involve searching, counting the number of objects of a given type, followed by determining their geometric characteristics. The main problem that impedes the direct application of methods is the provision of a given level of measurement error. Methods, depending on their specific combinations and input parameters, can give different results. This is due both to the quality of the image i...

Analysis of social networks is one of the promising areas of research. In addition to the development of a mathematical apparatus that allows processing the extracted data, it is of interest to identify new characteristics of user interaction. In the case of researching social networks, one of the important problems is the definition of a digital portrait of a user based on the consolidation and preliminary processing of open data from his profiles. To solve this problem, the authors previously proposed a model fo...

The article considers the issues of evaluating the quality and effectiveness of an information resource with Internet access dedicated to memorable places associated with the residency of famous Russian personalities. The authors noted that one of the problems is choosing the indicators and evaluation criteria that characterize the effectiveness and efficiency of museum activities, as well as the impact of museums on society. The following main functions of museums are highlighted: collection, preservation and doc...

The use of a qualified electronic signature has become more widespread in recent years, and one of the main prerequisites for this is the development of electronic services using a qualified electronic signature for authentication. Some of the services require additional entry of a username and password and they show that a qualified electronic signature complements the security of authentication by becoming the so-called "Second factor". All services provided by a qualified electronic signature in the browser are...

The article examines the issues of virtual reconstruction of memorable places associated with residency and activities of V.F. Voyno-Yasenetsky (Saint Luke the Surgeon) in the city of Tambov (Russia). Valentin Felixovich Voyno-Yasenetsky (1877-1961) ? a religious figure, archbishop, famous Russian and Soviet doctor, doctor of medical sciences and theology, winner of the Stalin prize of the first degree. In order to visualize individual objects of memorable places in Tambov, their three-dimensional virtual reconstr...

Most of the time, in assessing a situation where a leakage of combustible gas is involved, the volume of the room where the release occurs and the volume of the released gas is taken into account, thus resulting in an average concentration of the fuel gas applied to the entire volume of the room. In some cases, when the source of combustible gas is close enough to the source of initiation, or when air currents converge at the location of the source of initiation carrying amounts of combustible gas, the explosive m...

Application of image processing recognition in the agricultural field is a difficult and intensive task. Recent years developments of technologies such as GPUs (Graphics Processing Units) and the fast development of artificial intelligence algorithms allows the reliability of using computer vision technology to be used for recognition of plants, including weeds, ensuring the efficiency of intelligent agricultural systems. Computer vision technology uses a camera and a computer to identify and measure objects in th...

Academic rankings can be referred to as a tool of external evaluation of university performance, and a crucial role that the rankings play now in government decisions to fund university research around the world is undoubtful, despite all the ambiguity and skewness of rankings methodologies. Having said that the publication productivity and citation impact are important criteria of rankings evaluation, not only university management needs to be sure that the rankings trajectory is well applied, or incorporated int...