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In this paper, a computational method to predict the dimensional changes in some powder metallurgy materials is used. The samples prepared from pre-alloyed iron base powders produced by atomization (< 45, 45-63, 63-100, 100-150, >150?m) were the materials analyzed in this paper. The analyzed powders were compressed in a mold using uniaxial pressing at 400 and 600 MPa with the disc dimensions of ? 8 ? 6 mm. The sintering temperature was approximately 1.150 °C for 60 and 90 minutes. The density in green and sintered...

A generalized spectral-analytical method (GSAM) for analyzing data of various physical nature has been developed. It is based on the generalized Fourier representation of the original experimental and model digital arrays. In this report, it is used in the implementation of a resonant-impedance method for diagnosing and studying the characteristics of mechanical systems (in particular, linear one-dimensional acoustic systems with local anomalies). In the framework of this approach, the anomaly (damage) of the syst...

Vulnerability may be considered one of the most important components of the seismic risk, as it is the only one that human society may act upon in order to reduce the risk. As seismic vulnerability implies multiple dimensions, from the physical one to the social and economic ones, a multi-criteria decision-making approach proves to be appropriate for its assessment. The uncertainty inherently involved in the assessment process is addressed using fuzzy logic theory. This paper aims to assess the seismic vulnerabili...

Within the framework of this work the solution of the problem of synthesis of adaptive electronic document management system (EDMS) is considered. An important problem of modern information systems is their personalization to the individual characteristics of users. This improves their efficiency, flexibility, convenience and productivity. To solve the problem of synthesis of adaptive EDMS proposed algorithmic and mathematical support, the original concept of information system architecture and the use of machine ...

Today, under the conditions of negative effects of the influence of natural and, especially, anthropogenic factors on the natural environment, automated systems for monitoring the state of the environment are spreading. The purpose of the work is to develop an analytical decision support system based on the results of forecasting indicators of surface water pollution of the city Lviv. To analyze and forecast the indicators of surface water pollution in Lviv, a trained neural network was created using the Python pr...

Last decades witnessed a significant increasing in energy consumption in data centers and server rooms. More powerful equipment and more complex IT services have been driving to more power demand. Since infrastructure and energy costs in data centers have become a central factor in IT management, a range of technologies has been developed to increase energy efficiency. New hardware and power management options support energy saving strategies. An appropriate procurement plan is essential for building an efficient ...

The article presents the results of the analysis of the dependence of the effectiveness of requests submitted to scientific competitions from the criteria for their evaluation. Statistics of requests submitted to external competitions from ITMO University was obtained from the implemented automated system for requests recording. This system performs the functions of formation of the register of requests of the organization, and also allows to check the requests for their compliance with the requirements of the sel...

The paper deals with the actual problem of assessing the quality of video content transmission in modern wireless networks. A review and analysis is made for the quality level of the currently most popular protocols and technologies for transmitting video content in wireless networks. It analyzes video content transfer technologies based on the HyperText Transfer Protocol (HTTP), namely HTTP Progressive Download (HPD) and HTTP Adaptive Streaming (HAS). For HTTP Progressive Download and HTTP Adaptive Streaming tech...

Large arctic projects, both on land and at sea or in coastal zones, have to include the management of natural risks using the tools of geo- information support of decision-making, as part of geo-information management for territorially distributed systems. We consider the development of a system for monitoring the versions of data within geo-information support for Arctic projects. Data can come from different sources, including satellites. Then obtained data are combined into a single network (cluster) to create ...

In the present study, the mechanical properties of some iron-based sintered alloys prepared by powder metallurgy route were predicted using Artificial Neural Network (ANN) approach. Artificial Neural Networks (ANNs) are important tools used to predict the complex processes with many variables and interactions. In order to prepare the sintered compacts, the powders prepared from pre-alloyed iron base powders produced by atomization (< 45, 45-63, 63-100, 100-150, >150 ?m) were the materials analyzed in this paper. T...

The paper proposes an analytical and simulation model of a sensory distributed wireless traffic control system on the roads of urban and rural settlements. The results of an analytical review of neurophysiological studies of the visual behavior of drivers, depending on the boundaries of the outdoor advertising area in the roadside, are presented. The technologies for collecting and transmitting data from the wireless monitoring of the road traffic situation were analyzed. A method is proposed for determining the p...

The most challenging question is protection the authentication process in the cybersecurity. Since a lot of companies decide to store their data in the cloud services, it is crucial to secure the authentication process here. The authentication is the most vulnerable process because of its simple identifying weaknesses. It is used by all attackers that make their attacks destroying and more accurate. The hackers use it for the identity thefts or other cybercrimes. First, I need to research all current threats to th...

We consider the model of a prototype for a measuring platform for black carbon control in the Arctic within the framework of the geo-information management of difficult-to-access complex territorially distributed systems, taking into account the promising technologies of the Internet of Things and the associated Big Data challenge. Data can come from different sources. Then obtained data are combined into a single network based on Big Data technology. Geo-information support of decision-making in black carbon cont...

This paper suggests that in order to create efficient backup and recovery strategy for database management system, an appropriate unit of analysis and a proper, data is needed. Key factors for evaluating backup and recovery are time needed to bring the system back online and the amount of data loss. The paper examines methods for managing these factors in three of the most popular DBMS ? MySQL, MS SQL Server and MongoDB. Each of them has a set of backup types that can be combined in different strategies. Depending...

From 1994 to the present, records of deformations of the Earth?s crust, which are measured by a laser displacement meter, called ?deformograph?, are regularly recorded. This meter records changes in the distance between the mirrors fixed on the rock inside the mountain gallery in two directions: North-South and West-East. Such observations are carried out in the Gorny Altai region, in Kazakhstan and near Lake Baikal. One of the long-acting deformographs is installed in the gallery of the Talaya seismic station in ...

Taking into account that nowadays the websites lacking at least one dynamic component or side is rare (ea. the contact form) the focus of the current paper is granted to the programming environments and the scripting languages used for producing and running dynamic websites. Among the most popular scripting languages the PHP outstands its competitors ASP.NET, Java, CFML or Python. Within this framework, with the aim of separating the content from the presentation of a website content selected aspects linked to the...

A modern feature of websites' creation aside from the PHP scripting language is the use of a database. It is acknowledged that PHP offers the possibility of an advantageous structure for the source code, yet its real capacity is highlighted when the programming language works together with a database. Among these databases one can enumerate MySQL, Oracle or PostgreSQL and the list can be easily extended. The PHP language has predefined functions and native connectivity with the above-mentioned databases. The curre...

In work the solution of a operational and confidential data transmission problem with the necessary quality level of decodifying in the conditions of continuous increase in volume of video content containing data on critical infrastructure objects is proposed. The mechanisms allowing to define availability of planimetric information at stage of color-difference transformation are developed. Evaluation of the work of the developed method is given. To increase the data transfer rate, it is proposed to encrypt only t...

This paper deals with the effective usage of digital twin for managing and optimizing production in small and medium-sized companies. Simple and effective business operation is related to the necessary digitization of documents. A set of digitized information and production-related data are the basis for the creation of a digital twin. The use of a digital twin involves effective management, control and optimization of production within a set of several small and medium-sized companies with the same or technologic...

The paper deals with the inefficiency of data normalization in media stream processing applications. In the classical approaches, while building a relational database architecture, developers strive to maximize the normalization of the database and bring the business logic of the system to external applications. Normalization and business logic separation have reached their apogee in object-relational mapping systems. Telecommunication systems have their own specifics. Due to the requirements for the quality of se...

Access time is the most influential factor in determining access of people to healthcare services, be them urgent medical services or related medical services. The analysis on access times to the current public health infrastructure highlights the uneven spatial distribution of the main public health infrastructures, and also reveals some areas with access restraints. In this case, work is needed to develop hospital infrastructure so as to eliminate territorial disparities in terms of access. We employed ArcGIS Ne...

The Higher Education and universities have high impact for regional development and youth migration. We suggest what the migration of people with a high level of knowledge (called ?brain drain?) is detrimental for the region of emigration. High level universities attract the best students and growth the brain drain. There are close relationships between neighboring regions. Distance can be understood as a barrier of human capital growth. Geographical distance between parental home and college poses a potential bar...

In the Czech Republic, in order to optimize crisis management processes on both the national level and within self-administration bodies, aiming to prevent or minimize consequences of emergency and crisis situations, provision of operational system for rescue and recovery work and other measures for crisis situations, and an effective information support are necessary. Therefore an appropriate geographic information systems of crisis management were designed and are now being utilized. An applied research method w...

A few years ago, I start asking myself how my profession (i.e. accountant) will change under the IT impact and how AI would affect humanity. I consider this article provides important answers for the accounting profession since last technologies are capturing new horizons and particularly, accounting is changing under the IT signature. This paper intends to emphasize the changes which accounting will support under the emergence of new technologies and how much AI marks accounting in this technological environment....

The Ore Mountains in the Czech-German borderland (Central Europe) were depopulated after the 2nd World War. The rapid population decrease affected the industry that used to be in this region for ages and almost all the industry in the Czech side of the Ore Mountains vanished. More than 240 vanished objects (factories, technical objects, manufactures) were identified during background research and the field survey in the area of interest. Based on the history and depopulation of this region, the vanished objects ma...

Lately, the optical wireless communication systems (OWC) are beginning to be more developed. Because of the rapid development of the technology and the desire of an eco-friendlier environment, the conventional lighting systems began to be replaced by LED lighting systems. The advantages of this systems are that the energy is more efficiently used, the lifespan is longer, and they generate lower heat. The new developed Visible light communication (VLC) technology can be used, besides illumination, to transmit data ...

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...

The main ways that are used to solve problems and create mechanisms for protecting information are generally considered to be: technical devices, the whole set of which is divided into: physical and hardware - and software - programs designed to perform actions aimed at ensuring the protection of information. As a result of the development of computer security and information technologies, experts have concluded that the use of any one of the above methods will not provide reliable information protection. The comp...

We consider innovative technologies in the field of geoinformation management. While planning and implementation of large projects, for example, in the field of environmental management, both on land and at sea or in coastal zones, an important aspect is the management of natural risks using the tools of geo- information support of decision-making, based on geo-information management principles of complex territorially distributed systems, including legal framework and economic justification. The aim of the resear...

Modeling using artificial neural networks (ANNs) is used in most fields of production. An approach to modeling the dimensional changes in some iron-based powder metallurgy (PM) parts during the sintering process is given. The proposed model used is a multilayer neural network with a backpropagation learning algorithm. This type of neural network model gave the best results in the process of modeling. The specimens used in this study are prealloyed iron-based powders. The particle size of the powders is ranging fro...

The conventional method of power generation is the main source of power today. With the changes in modern electronics, the uses of alternative power generation options become more and more viable. Series compensation has been successfully utilized for many years in electric power networks. With series compensation, it is possible to increase the transfer capability of existing power transmission systems at a lower investment cost and with a shorter installation time compared to the building of new, additional line...

Worldwide, fires have always been a topical issue, being events with a high occurrence probability, followed by significant material and sometimes, human losses. Statistics show a slightly decreasing trend in the number of fires reported in recent years, respectively in terms of casualties, reflecting an increasing focus on fire safety, through national regulations and legal provisions. Fire sprinkler systems frame into the category of active fire protection and control systems. They are fire extinguishers using d...

Recognition of the numbers is a necessary condition for the development of 3D street viewers. Using information about the position of the viewer relative to the detected site by self-driving car will make it possible to adjust the path and increase the accuracy of its implementation. The unmanned device (unmanned aerial vehicle or self-driving car) is equipped with a video camera or camcorder system. In the process of detecting house numbers, the image from the camera contains noises and redundant information. The...

The work is devoted to the development of an approach allowing us to visualize complex infrastructure networks. The results of testing various layout algorithms on the plane of the graph representing the complex infastructure network are presented. The method of automatic graph layout is offered, which allows to efficiently perform the layout of a graph of a large-scale infrastructure network. The method of clustering the graph of the infrastructure network, taking into account the strength of the branches and the...

This work initiates a study toward developing and applying computation models of cyber-physical systems on the basis of hexagonal lattice. The focus is on mathematical description of continuous population dynamics combined with dynamic logic used for discrete events. First, we introduce a class of lattice differential equations with time delay simulating interactions within hexagonal pixels. Spatial operator is modeling diffusion-like interaction between hexagonal pixels. We then use the syntax of dynamic logic to...

In the work there is offered approach to determine index of quality of city environment which is used for development of master plan of a city. As an example of application of this methodology there is considered the project of master plan of Ternopil with help of geoinformational system. Over the past two decades the cities of Ukraine are undergoing a new phase of their development, which is associated with a radical change in the economic system (the transition from the planned management to a market economy) wi...

Recent online translators for languages without a significant number of speakers cannot reach the quality of the translators for languages such as English, Spanish, and French, etc. The great number of users of these common languages means a higher possibility of correction of an inaccurate translation. For those languages with around ten, twenty million speakers, translators cannot gain such effectivity. All the documents produced in the EU must be translated into all the languages of the EU. Translators that hav...

In the last decades the energy consumption of data centers has increased exponentially. The high energy consumption is due to power consumption of the IT resources, to the cooling system and to the inefficient usage of the resources. From the total power consumption in a data center one half is consumed by active servers and another half is consumed by the cooling system, network of the data center etc. There are several techniques for increasing the efficient usage of the resources in a data center. One of these ...

The paper considers the problem of velocity model reconstruction of an elastic medium in the problem of monitoring the zones of underground nuclear explosions. The inverse problem can be solved with help of finding solutions for a set of forward geophysical problems. Main problem is to find the location coordinates and treat to find the characteristic size and shape of cavernous object in entire isotropic elastic media. To realize it the problem statement and the description of basic methods to perform full seismi...

The significant centres of settlement on the territory of the Czech Republic have also their suburbs aside from their core areas (centres). The dynamics of outflow of population from city centres to suburban areas influences significantly the global character of a city as such. The influence of suburbanization is currently evident in all larger residential centres. The urbanization of rural population and the extension of administration boundaries of cities lead to distinguished and mutual interaction of the neigh...

The article deals with the design of an alternative meteorological network, whose inexpensive metering devices would be installed on non-specified mobile means or at general aviation airports to collect selected spatial data. It analyzes the need for a minimum level of equipment for meteorological measurement systems to ensure the professional collection of analysis and visualization of specific spatial data. The process of analyzing the collection, analysis, and visualization of specific spatial data will also be...

The paper solves the actual problem of assessing the quality of data transmission over atmospheric optoelectronic communication lines in computer networks. The topologies of the simplex infrared data transmission channel are analyzed. The calculation of the optical system is reduced to determining the fraction of the radiated infrared power that falls on the photodetector. The total loss of the optical information signal is determined due to the mismatch of the parameters of the transmitter and receiver of the inf...

The quality of life is one of the frequently discussed topics nowadays, not only in the academic sphere but also within the international policy-making institutions. In the past decades, dozens of complex methods for assessment of the quality of life have been developed. Different approaches can be applied regarding the quality of life evaluation. For many applications, a simple evaluation combining both the subjective and objective information and oriented on the ?life results? (means indicators of the good life)...

The paper considers the problem of velocity model reconstruction of an elastic medium in the problem of monitoring the zones of underground nuclear explosions. The inverse problem can be solved with help of finding solutions for a set of forward geophysical problems. Main problem is to find the location coordinates and treat to find the characteristic size and shape of cavernous object in entire isotropic elastic media. To realize it the problem statement and the description of basic methods to perform full seismi...

Regular measurement of rock deformation processes makes it possible to make judgments about the nature of the deformations of the Earth's crust, as well as the likely precursors of earthquakes near the area where these data are obtained. Therefore, the continuous operation of measuring devices that record such deformations is extremely important. When measuring by laser methods in a normal atmosphere, the distance of measurements can be significant, up to 25 meters and higher. The disadvantage of such measurements...

Optimization is an iterative iterative process of improving the distributions of distributed computer applications obtained through the reengineering process so as to ensure the efficient allocation of resources for the implementation of the stages included in the reengineering. The article mentions how to choose each new goal and studies the model already implemented to start the project. It starts from the design of the existing application, and then applies the succession of stages specific to re-engineering. O...

3D modelling of the geology formations of the earth is an essential step towards understanding of complex geological phenomena and must be based on the whole of knowledge and available data for the study area (digital terrain models, geological and geophysical maps, sections, drill-holes and geological interpretation). 3D GeoModeller software made by Intrepid Geophysics Co. was designed to assemble together into the same 3D space data from various sources, in order to ensure geometrical coherence. For interpolatio...

The information system interface consists of various elements. Attention of the user decreases when working with a large amount of information. The authors suggest that it is possible to implement recommendatory (adaptive) modules for users, using changes in the graphical part of the interface. Such changes are called interface personalization. Personalization allows you to focus the user's attention on the most relevant elements of the user. To reduce the resource consumption of recommendation modules, it makes s...

This article describes the key features of the automatic speech recognition systems training process that can be used in a work of chat bot or voice assistant. Importance of research in this area is grazed. Difference between chat bot, voice helper and voice assistance are explained. Basic requirements for correct chat bot usage are formulated. Some common automatic speech recognition systems are reviewed. Kaldi and CMU Sphinx has been used as an open source systems? example. The whole installation and training pr...

In this paper, the artificial neural network (ANN) technique is used to predict the wear resistance e under dry sliding conditions of some iron-based powder metallurgy materials subjected to a thermochemical treatment. The analyzed specimens were obtained using the conventional powder metallurgy route: mixing the raw powders with 1% zinc stearate, cold compacting at a pressure of 400 MPa and sintering at a temperature of 1150°C for 60 minutes. Following the sintering step, the specimens were subjected to carburizi...