Advances In Cyber-Physical Systems. – 2021. – Vol. 6, No. 1

Permanent URI for this collectionhttps://ena.lpnu.ua/handle/ntb/56835

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Засновник і видавець Національний університет «Львівська політехніка». Виходить двічі на рік з 2016 року.

Advances in Cyber-Physical Systems / Lviv Polytechnic National University ; editor-in-chief A. Melnyk. – Lviv : Lviv Politechnic Publishing House, 2021. – Volume 6, number 1. – 83 p. : il.

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Content (Vol. 6, No 1)


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    Investigation of Greenhouse Monitoring and Control System
    (Lviv Politechnic Publishing House, 2021-03-01) Sahaidak, Tetiana; Huzynets, Nataliia; Lviv Polytechnic National University
    Unsuitable climatic conditions, various natural disasters and instability and unpredictability of the weather significantly complicate cultivation, and sometimes make it even impossible. To ensure the best conditions for cultivation and the highest yields, farmers began to use greenhouses. However, in our hectic lives, people are constantly busy with something and there is no enough time. Long trips, business trips, vacations are also possible. It is becoming increasingly difficult to provide the necessary conditions for plants to grow on their own. That is why the Internet of Things has been so successfully integrated with agriculture that it has led to the emergence of automated or intelligent greenhouses. The article attempts to analyze the types of greenhouse monitoring and control system, their technical characteristics, principles of operation and basic requirements for these systems. According to the results of the study, the best smart greenhouses have been selected. The main functions of automated greenhouses have been described. Selection criteria have been determined and a comparative analysis of the most popular products available on the market.
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    Online Video Platform with Context-Aware Content-Based Recommender System
    (Lviv Politechnic Publishing House, 2021-03-01) Pisotskyi, Marian; Botchkaryov, Alexey; Lviv Polytechnic National University
    The problem of developing an online video platform with a context-aware content-based recommender system has been considered. Approaches to developing online video platforms have been considered. A comparison of popular online video platforms has been presented. A method of context-aware content-based recommendation of videos has been proposed. A method involves saving information about user interaction with video, obtaining and storing information about which videos the user liked, determining user context, composing a profile of user preferences, composing a profile of user preferences depending on context, determining the similarity between the video profile and a profile of user preferences (with and without context consideration), determining the relevance of the video to the context, the conclusive estimation of the relevance of the video to the user's preferences based on the proposed composite relevance indicator. The developed structure of online video platform has been presented. The algorithm of its work has been considered. The structure of the online video platform database has been proposed. Features of designing the user interface of the online video platform have been considered. The issue of testing the developed online video platform has been considered.
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    Model of Process Synchronization in Through Analysis
    (Lviv Politechnic Publishing House, 2021-03-01) Martynyuk, Oleksandr; Odessa Polytechnic State University
    Synchronization of parallel processes of distributed information systems (DIS) has been largely determined by decisions taken at the stages of their design. Having already been in structural andfunctional models, when determining cause-and-effect relationships for events and actions in DIS components, it becomes necessary to coordinate them. In the proposed multilevel systemic, structural and functional synchronization model, a hierarchy of such causal relationships with interlevel mappings, inheritance and encapsulation of events and actions have been formed. The model has been also based on hierarchical extended Petri nets, which make it possible to represent various aspects of a special analysis of technical diagnostics, in particular, analysis of correctness, verification, testing, for the adopted display of the asynchronous-behavioral nature of the multilevel interaction of DIS processes. Features of the synchronization model include mapping operations for cross-level inheritance and encapsulations that synchronize events and actions, as well as end-to-end synchronized quasiorder relationships and compatibility for them. The synchronization model is also distinguished by the possibility of specializing its objects, operations and relations for the tasks of check and recognition of behavioral properties set for analysis and verification, basic in technical diagnostics, including in online and offline testing. The synchronization model has allowed one to determine the formal conditions for methods of end-to-end asynchronous coordination of events and actions of multi-level models, that represent design solutions for DIS, in particular, for technical diagnostics methods, and also to reduce the computational complexity of a special synchronization analysis due to an end-to-end decomposition approach. The dimension of the synchronization model has been estimated using the representation of Petri net graphs and special graphs of reachable states using list structures. The above estimates determine the limits of applicability of the formal synchronization model.
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    System for Effective Small Business Support
    (Lviv Politechnic Publishing House, 2021-03-01) Pavlenko, Volodymyr; Lashko, Oksana; Lviv Polytechnic National University
    This paper considers the problem of developing specialized software designed to support small businesses. It substantiates the relevance of creating such systems; architecture has been offered; and the results of development have been given. For practical use, a specific subject area has been considered, which allows to clearly understand the purpose and outcome of the work. These materials can be used to obtain ready-made solutions during the development of a software package on this topic. This document can be considered as an introductory material for the various stages of the project to develop a system of effective support of small business.
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    Using Improved Homophonic Encryption on the Example of Code Zodiac Z408 to Transfer Encrypted Information Based on Data Traffic
    (Lviv Politechnic Publishing House, 2021-03-01) Mamro, Oleksandr; Lagun, Andrii; Lviv Polytechnic National University
    This article examines the improvement of homophonic encryption using the well-known Z408 cipher as an example, and analyzes their problems to further correct the main shortcomings of this typea of encryption. In the practical part, an encryption system similar to Z408 was created and the complexity ofthe language analysis for this cipher was increased. The correlation dat of the number of alternative characters was used to improve the transmission of encrypted data depending on the load of the device. The more symbols and the higher the load, the fewer the number of alternative symbols will be used.
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    Software Implementation of Gesture Recognition Algorithm Using Computer Vision
    (Lviv Politechnic Publishing House, 2021-03-01) Kotyk, Vladyslav; Lashko, Oksana; Lviv Polytechnic National University
    This paper examines the main methods and principles of image formation, display of the sign language recognition algorithm using computer vision to improve communication between people with hearing and speech impairments. This algorithm allows to effectively recognize gestures and display information in the form of labels. A system that includes the main modules for implementing this algorithm has been designed. The modules include the implementation of perception, transformation and image processing, the creation of a neural network using artificial intelligence tools to train a model for predicting input gesture labels. The aim of this work is to create a full-fledged program for implementing a real-time gesture recognition algorithm using computer vision and machine learning.
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    Acquisition and Processing of Data in Cps For Remote Monitoring of the Human Functional State
    (Lviv Politechnic Publishing House, 2021-03-01) Hupalo, Petro; Melnyk, Anatoliy; Lviv Polytechnic National University
    Data acquisition and processing in cyberphysical system for remote monitoring of the human functional state have been considered in the paper. The data processing steps, strategies for multi-step forecasting evaluation metrics and machine learning algorithms to be implemented have been analysed and described. What is important, this way it will be possible to track the condition of the sick and response to the health changes in advance.
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    Implementation Kalyna Algorithm in Microcontroller
    (Lviv Politechnic Publishing House, 2021-03-01) Bilenko, Volodymyr; Hlukhov, Valerii; Lviv Polytechnic National University
    The information security is playing an increasingly important role nowadays. Therefore, virus can be transmitted through the information in encrypted form. This is also applied to embedded systems. In this regard, the article is assigned to the topic of cryptocurrency protection in embedded systems using the national Ukrainian standard Kalyna. To further explore the topic, this algorithm was implemented on a microcontroller to test the performance, convenience and prospects for usage in embedded systems.
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    Software Service with a Plug-In Architecture for Text Readability Assessment
    (Lviv Politechnic Publishing House, 2021-03-01) Tsebryk, Bohdan; Botchkaryov, Alexey; Lviv Polytechnic National University
    The problem of developing a software service with a plug-in architecture for assessing the readability of text has been considered. The problem of text readability assessment has been analyzed. Approaches to the development of a software service for text readability assessment have been considered. The structure of the service for text readability assessment has been proposed. The structure of the service has been implemented using the Python programming language and the library Natural Language Toolkit (NLTK). The results of testing the service for text readability assessment have been presented.
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    Contents
    (Lviv Politechnic Publishing House, 2021-03-01)