Work place: State University of Infrastructure and Technologies, Department of the Information Technologies and Design, 04071, Kiev, Ukraine
E-mail: zavgorodniivalerii@gmail.com
Website:
Research Interests: Decision Support System
Biography
Valerii Zavgorodnii: Professor of department of Information Systems and TechnologiesNational Technical University of Ukraine “Igor Sikorsky Kiev Polytechnic Institute”Born on May 25, 1982. PhD (2013) from Kremenchuk Mykhailo Ostrohradskyi National University; Doct. of Sc. (2021) from State University of Information and Communication Technologies. Prof. (2021) of Department of Systems Software.
Major interests: information technologies, databases, decision support systems, introduction of Information and communication technology in the educational process.
By Viktor Vyshnivskyi Vadym Mukhin Vitalii Kotelianets Yuri Kargapolov Valerii Zavgorodnii Oleksandr Vyshnivskyi
DOI: https://doi.org/10.5815/ijwmt.2025.04.02, Pub. Date: 8 Aug. 2025
The article discusses the solution to the issue of information systems architecture, which makes it possible to separate identification flows associated with the processes of managing the identification of digital entities and data flows associated with the processes of managing data describing the properties of digital entities. At the same time, a new architecture of connections between digital entities and services is proposed, which makes it possible to create a flexible system for processing the properties of identifiers that can be described in an irregular and unstructured form. In this case, the nomenclature of the parameters of the properties of a digital entity can be customized and expanded as a separate entity, which always maintaining a connection with the identifier. This allows, within the framework of the information system, on the one hand, to adapt any identification systems and ensure the solution of convergence requirements, to ensure compliance and solution of the requirements of recognition, immutability, stability in conditions of processing large volumes of data without implementing generally accepted principles of a global unique permanent identifier, and on the other hand, build flexible connections between digital entities and services.
[...] Read more.By Valerii Zavgorodnii Nadiya Braykovska Oleksandr Yarovyi Anna Zavgorodnya Viacheslav Liskin Oleg Mukhin
DOI: https://doi.org/10.5815/ijcnis.2023.04.03, Pub. Date: 8 Aug. 2023
We described the placing of the mobile agents in a dynamic environment. It formed a dynamic environment for a complex of dynamically changing mobile agents. We described a two-level system of connections at the global and local levels of interaction. Such a scheme allows you to support the survivability of a dynamic environment. We presented the model of placement of mobile agents in a dynamic environment, which forms the basis of the trajectory of interaction between mobile agents, enabling us to combine the dynamic environment into a unified dynamic environment. The proposed method for mobile agents parameters restoring in a unified dynamic environment, taking into account the similarity coefficients, allows restore 80% parameters of an inaccessible mobile agent. This indicates the high efficiency of the objects description in the form of a unified dynamic environment in order to maintain its integrity.
[...] Read more.By Vadym Mukhin Pavlo Anakhov Viktoriia Zhebka Vladislav Kravchenko Aksieniia Shtimmerman Valerii Zavgorodnii Yurii Bazaka
DOI: https://doi.org/10.5815/ijcnis.2022.05.01, Pub. Date: 8 Oct. 2022
A hybrid network, which consists of the sections of communication lines with the transmission of signals of different physical nature on different transmission media, has been considered. Communication lines respond differently to threats, which allows to choose the line with the best performance for the transmission of information. The causal diagram of events that determine the state of the information transmission network, such as changes in emergency/accident-free time intervals, has been presented. The application scheme of the protection measures against dangerous events has been shown. To verify the measures, a matrix of their compliance with typical natural disasters has been developed and relevant examples have been given. It is suggested to evaluate the flexibility of the telecommunication network by its connectivity, characterized by the numbers of vertex and edge connectivity, the probability of connectivity. The presented scheme of the device for multi-channel information transmission in a hybrid network allows the choice for the transmission of information to the channel with the best performance. Using this device is the essence of the suggestion about increasing the flexibility of the network.
[...] Read more.By Andrii Rybalochka Vasyl Kornaga Daria Kalustova Vadym Mukhin Yaroslav Kornaga Valerii Zavgorodnii Sergiy Valyukh
DOI: https://doi.org/10.5815/ijigsp.2022.03.01, Pub. Date: 8 Jun. 2022
In this paper, aspects of obtaining white colour hues for displays/monitors and lighting by using three- and four-components LED systems are discussed. Photometric equipment developed by us for multichannel LEDs control is used in an experimental study to verify theoretical calculations. Three-component RGB and four-component RGBW LED systems, which utilise the same RGB light sources and two white LEDs with warm and cold hues, are investigated. Results of testing of luminous efficacy of such systems at different values of light intensity and comparison of the corresponding circadian action factor as the value of impact of summarized RGB and RGBW white light on human circadian rhythms are presented. It is demonstrated that the four-component RGBW LED systems are more preferable for lighting and displays than the three-components RGB LED systems, because of significant higher luminous efficacy and slightly lower circadian factor over the entire range of correlated colour temperature from 2500K to 7000K studied.
[...] Read more.By Alexander Dodonov Vadym Mukhin Valerii Zavgorodnii Yaroslav Kornaga Anna Zavgorodnya Oleg Mukhin
DOI: https://doi.org/10.5815/ijcnis.2021.04.01, Pub. Date: 8 Aug. 2021
The article describes the concept of a unified information space and an algorithm of its formation using a special information and computer system. The process of incoming object search in a unified information space is considered, which makes it possible to uniquely identify it by corresponding features. One of the main tasks of a unified information space is that each information object in it is uniquely identified. For this, the identification method was used, which is based on a step-by-step analysis of object characteristics. The method of parallel information object search in unified information spaces is proposed, when information object search will be conducted independently in all unified information spaces in parallel. Experimental studies of the method of parallel information object search in unified information spaces were conducted, on the basis of which the analysis of efficiency and incoming objects search time in unified information spaces was carried out. There was experimentally approved that the more parameters that describe the information object, the less the time of object identification depends on the length of the interval. Also, there was experimentally approved that the efficiency of the searching of the incoming objects in unified information spaces tends to a directly proportional relationship with a decrease in the length of the interval and an increase in the number of parameters, and vice versa.
[...] Read more.By Vadym Mukhin Valerii Zavgorodnii Oleg Barabash Roman Mykolaichuk Yaroslav Kornaga Anna Zavgorodnya Vitalii Statkevych
DOI: https://doi.org/10.5815/ijcnis.2020.02.02, Pub. Date: 8 Apr. 2020
The paper describes the organization of the unified information space which is based on the uniform principles and the general rules that ensure the informational interaction of objects.
In practice, in case when the communication with an information object of the unified information space is lost, the necessary information about this object should be collected by the analysis of previous interactions of the information object with the other information objects. The goal of this paper article is to develop a mechanism that will allow restore the missing parameters of information objects in case of communication loss with this object.
There was performed the experimental researches with the proposed mechanisms. The experiments have shown that there is an unequivocal relationship between the quality of restoration of an information object and the topology of links within an unified information space.
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