Yaroslav Kornaga

Work place: National Technical University of Ukraine Igor Sikorsky Kyiv Polytechnic Institute, 03056, Ukraine

E-mail: y.kornaga@kpi.ua

Website: https://orcid.org/0000-0002-4256-9647

Research Interests: Distributed Computing


Yaroslav Kornaga: Assoc. professor of Computer systems department of National Technical University of Ukraine “Kiev Polytechnic Institute”, PhD. (2015), Doct. of Sc. (2020) from the State University of Telecommunications; Assoc. Prof. (2015) of technical cybernetics department. Major interests: the security of distributed database and risk analysis; design of the distributed database; mechanisms for the adaptive security control in distributed database; the security policy development for distributed database.

Author Articles
White Colour Hues in Displays and Lighting Systems Based on RGB and RGBW LEDs

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.

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The Technique of Key Text Characteristics Analysis for Mass Media Text Nature Assessment

By Oksana Babich Viktor Vyshnyvskiy Vadym Mukhin Irina Zamaruyeva Michail Sheleg Yaroslav Kornaga

DOI: https://doi.org/10.5815/ijmecs.2022.01.01, Pub. Date: 8 Feb. 2022

The paper presents the technique for analysis of text emotional nature which is a key characteristic of Mass media news text. Emotions inherent design its Emotional coloring and become a significant feature of mass media news texts. The technique proposed measures the degree of exposure of emotions and allocates them by rating. Emotional coloring is defined by emotional characteristics and by grammar categories, and a set of rules is applied to regulate wordforms interaction. Techniques for verbal units analysis are examined. The Heavy Natural Language Processing models and Machine learning techniques are considered. They are compared and the optimum one is defined to resolve the problem of Emotional coloring evaluation. A system prototype is developed on the basis of this technique. It allocates news by influence rating according to their key parameters. The examples of texts’ emotional nature recognition results by means of the prototype are presented. The visualization of emotional nature analysis results highlights additional features of the news text’s emotional nature and expresses them in numeric values. It is exposed both by sentences and by the whole news text, with tracking of news Emotional coloring dynamics. The results presented have application in analysis procedure intending to studying Mass media, particularly informational environment with concomitant factors, and their impact on political and social interrelation.

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Method of Parallel Information Object Search in Unified Information Spaces

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.

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Method of Restoring Parameters of Information Objects in a Unified Information Space Based on Computer Networks

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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The Method of Hidden Terminal Transmission of Network Attack Signatures

By Igor Ruban Nataliia Lukova-Chuiko Vadym Mukhin Yaroslav Kornaga Igor Grishko Anton Smirnov

DOI: https://doi.org/10.5815/ijcnis.2018.04.01, Pub. Date: 8 Apr. 2018

This article is proposes a new approach to the transmission of signatures of network attacks onto a remote Internet resource. The problem is that the known protocols that are used for transfer data and control actions from an administrative resource to a network agents are poorly protected. Even in case of use of cryptographic mechanisms for organization of secure connections, it is possible to form behavioral patterns of interactions such as "administrative resource - network agents." Such templates allow to predict the actions taken in accordance with the security policy in order to maintain the required level of functionality of a remote Internet resource. Thus, it is necessary to develop a new protocol for the transfer of designated information, based on information technology, which level out the existence of opportunities for the formation of behavioral patterns of network interactions. As such technology, it is proposed to use a set of means of network interaction and some methods of hidden (steganographic) data transmission in information and telecommunication networks.

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Optimization of Parameters at SDN Technologie Networks

By Oleg Barabash Yuri Kravchenko Vadym Mukhin Yaroslav Kornaga Olga Leshchenko

DOI: https://doi.org/10.5815/ijisa.2017.09.01, Pub. Date: 8 Sep. 2017

A concept software-defined network is considered. Architecture of software-defined network is analyzed which, differently from traditional, foresee the separation of C-plane from a plane communication of data. The method of multicriterion optimization of multilevel networks is examined with determination of resulting objective function, which allows to carry out the synthesis of control system software-defined network (SDN) in the conditions of unforeseen changes of structure of the system.

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Distributed Computer System Resources Control Mechanism Based on Network-Centric Approach

By Zhengbing Hu Vadym Mukhin Yaroslav Kornaga Yaroslav Lavrenko Oksana Herasymenko

DOI: https://doi.org/10.5815/ijisa.2017.07.05, Pub. Date: 8 Jul. 2017

In this paper, we present the development of a decentralized mechanism for the resources control in a distributed computer system based on a network-centric approach. Intially, the network-centric approach was proposed for the military purposes, and now its principles are successfully introduced in the other applications of the complex systems control. Due to the features of control systems based on the network-centric approach, namely adding the horizontal links between components of the same level, adding the general knowledge control in the system, etc., there are new properties and characteristics. The concept of implementing of resource control module for a distributed computer system based on a network-centric approach is proposed in this study. We, basing on this concept, realized the resource control module and perform the analysis of its operation parameters in compare with resource control modules implemented on the hierarchical approach and on the decentralized approach with the creation of the communities of the computing resources. The experiments showed the advantages of the proposed mechanism for resources control in compare with the control mechanisms based on the hierarchical and decentralized approaches.

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Analytical Assessment of Security Level of Distributed and Scalable Computer Systems

By Zhengbing Hu Vadym Mukhin Yaroslav Kornaga Yaroslav Lavrenko Oleg Barabash Oksana Herasymenko

DOI: https://doi.org/10.5815/ijisa.2016.12.07, Pub. Date: 8 Dec. 2016

The article deals with the issues of the security of distributed and scalable computer systems based on the risk-based approach. The main existing methods for predicting the consequences of the dangerous actions of the intrusion agents are described. There is shown a generalized structural scheme of job manager in the context of a risk-based approach. Suggested analytical assessments for the security risk level in the distributed computer systems allow performing the critical time values forecast for the situation analysis and decision-making for the current configuration of a distributed computer system. These assessments are based on the number of used nodes and data links channels, the number of active security and monitoring mechanisms at the current period, as well as on the intensity of the security threats realization and on the activation intensity of the intrusion prevention mechanisms. The proposed comprehensive analytical risks assessments allow analyzing the dynamics of intrusions processes, the dynamics of the security level recovery and the corresponding dynamics of the risks level in the distributed computer system.

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Stochastic RA-Network for the Nodes Functioning Analysis in the Distributed Computer Systems

By Zhengbing Hu Vadym Mukhin Heorhii Loutskii Yaroslav Kornaga

DOI: https://doi.org/10.5815/ijcnis.2016.06.01, Pub. Date: 8 Jun. 2016

In the paper is described the simulating process for the situations analysis and the decisions making about the functioning of the Distributed Computer Systems (DCS) nodes on the basis of special stochastic RA-networks mechanism. There are presented the main problems in the estimations of the DCS nodes functioning parameters and there are shown that the suggested RA-networks mechanism allows simulate the data flow with the different, including the significantly different intensities, what is particularly important in for the situations analysis and the decisions making in the DCS nodes parameters dynamics control.

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