JOURNAL SCIENTIFIC AND APPLIED RESEARCH

International Editorial Board of vol. 27 No. 1 (2024): Journal Scientific and Applied Research

Petar Boyanov — Wed, 13 Nov 2024 00:00:00 +0200

International Editorial Board of vol. 27 No. 1 (2024): Journal Scientific and Applied Research

REVEALING ANOMALIES BY NETWORK PACKET FLOODING ON BUILT FTP AND OPENSSH SERVERS IN CONTROLLED LAB ENVIRONMENT

Petar Boyanov — Wed, 13 Nov 2024 00:00:00 +0200

This scientific paper investigates the effects of network packet flooding on FTP (port 21) and SSH (port 22) protocols, aiming to reveal and document anomalies in server behavior under high-load conditions. By simulating packet flooding in a controlled lab environment, an analysis on vulnerabilities and anomalies unique to each protocol is conducted in order to the improve defensive capabilities. The results provide guidance on best practices to secure FTP and OpenSSH services against malicious traffic, such as Distributed Denial of Service (DDoS) attacks, supporting wider network security strategies.

COMMUNICATION MODULES FOR DATA TRANSMISSION IN PHOTOVOLTAIC PERFORMANCE MONITORING AND ANALYSIS SYSTEMS

Iliyana Ivanova — Wed, 13 Nov 2024 00:00:00 +0200

The paper discusses the wireless communication modules used for monitoring photovoltaic systems-ZigBee, Wi-Fi, Bluetooth, GSM and LoRa. The aim is to compare the main features, advantages and disadvantages of each of these technologies. The analysis identifies the need for reliability, low power consumption and secure data transmission in the design of the systems.

AN APPROACH OF DOM RECORD MANAGEMENT COMPONENT UI CREATION

Valentin Atanasov — Wed, 13 Nov 2024 00:00:00 +0200

This paper presents an approach of Document Object Model database record management component user interface (UI) creation. Mainstream of UI development approaches concentrates in few directions, omitting holistic view on the fundamental database operations. The proposed solution uses method lay on of standard clauses adopted by the ECMA Script edition sixth and above. The program logic for the UI component was built with the intention - The existing functionality of such UI component to be extended and complemented.

ANALYSIS OF THE OUTPUT VOLTAGE SPEKTRUM OF A PARAMETRIC MICROWAVE CONVERTER

Dragomir Vasilev — Wed, 13 Nov 2024 00:00:00 +0200

In this scientific paper, we have considered a method for determining the complex reflection coefficient based on spectral analysis of the output voltage of a parametric microwave converter.

PRACTICAL APPLICATIONS OF HASH FUNCTIONS MD5, SHA-1, AND SHA-256 USING VARIOUS SOFTWARE TOOLS TO VERIFY THE INTEGRITY OF FILES

Petar Boyanov — Wed, 13 Nov 2024 00:00:00 +0200

In this scientific paper hash functions such as MD5, SHA-1, and SHA-256 are widely utilized in the field of cryptography to verify file integrity, confirming that files remain unaltered and free from corruption. The practical application of the hash functions MD5, SHA-1, AND SHA-256 through five widely used software tools: 7z, PowerShell, BullZip MD5 Calculator, HashCalc and CrypTool 1.4.40 is made. The analysis focuses on each tool's effectiveness in calculating and comparing hash values, emphasizing their strengths and weaknesses in ensuring data integrity. By investigating the functionality and applications of each tool, this scientific study provides important perspectives on the practical significance of MD5, SHA-1, and SHA-256 for maintaining the authenticity and reliability of digital files.

USE OF A CHATBOT IN AUTOMATED INFORMATION SYSTEM FOR PROCESS MANAGEMENT IN EDUCATION

Desislava Ivanova, Valentin Atanasov — Wed, 13 Nov 2024 00:00:00 +0200

This scientific paper presents a role-based aspect of chatbots in the educational field, covering certain of their advantages and disadvantages. Future trends in their development are presented. The use and implementation of chatbots in an automated information system for process management in the educational field is discussed.

APPLICATION OF HEURISTIC ALGORITHMS IN LOGISTICS

Andrey Bogdanov — Wed, 13 Nov 2024 00:00:00 +0200

The paper deals with algorithms for solving logistics problems. It describes types of heuristic algorithms focusing on their strengths and weaknesses. Incorporating the advantages and disadvantages of heuristic algorithms, it offers feasible solutions.

REAL-TIME GIS FOR MONITORING AND SECURITY

Donika Dimanova, Zdravko Y. Kuzmanov — Wed, 13 Nov 2024 00:00:00 +0200

Applications of geographic information systems in the security domain are diverse and cover various aspects such as crisis prevention and management, public safety, national security, critical infrastructure protection and military applications. Real-time GIS is essential for effective emergency response and management because it provides accurate information on the location and dynamics of events.

ANALYSIS OF THE CHARACTERISTICS OF AUTOMOTIVE MASS AIR FLOW SENSORS

Tihomir Trifonov, Hristo Hadjiivanov — Wed, 13 Nov 2024 00:00:00 +0200

An analysis of the characteristics of automotive mass air flow sensors is made. A test system has been developed to study the sensors. The measurement data is processed with MATLAB using curve fitting.

GEOGRAPHICAL INFORMATION SYSTEMS AND THEIR APPLICATION IN VARIOUS FIELDS

Donika Dimanova — Wed, 13 Nov 2024 00:00:00 +0200

Geographic information systems are powerful tools for collecting, analyzing and visualizing geographic data to support decision making in a variety of activities. The aim of this paper is to present the basic principles of GIS and their applications in various fields ranging from ecology and urban planning to health and security. GIS plays an important role in the modern world, enabling better understanding and management of spatial processes and phenomena.

ABOUT THE GUARANTEED INTRADEPARTMENTAL RESERVE IN THE CONTEXT OF INTRALOGISTICS

Svetlozar Stoyanov — Wed, 13 Nov 2024 00:00:00 +0200

In general, the current paper implies the conclusion that the determination of the impact of randomly occurring pauses in the work of the production unit with continuous technological process depends on the created intradepartmental guaranteed reserve.

GNSS TECHNOLOGY FOR RESEARCH OF DEFORMATIONS OF HYDROTECHNICAL INSTALLATIONS

Stefan Dobrev — Wed, 13 Nov 2024 00:00:00 +0200

Hydro technical installations are subject to a list of temporary and constant factors, such as Natural, Physical, Tectonic, Anthropogenic and other, which lead to their deformation and destruction. Study, exploration and forecast of deformations, can save us big. In this article has been researched the GNSS capability of obtaining the necessary data for building a model and reading or predicting deformations. GNSS has been used for monitoring structural deformation and deflection for more than a 30 years now. Detailed procedures for field data collection, data analysis and visualisation, generation of reliable analytical model, model updating and prediction for structural operational condition are also recommended.

INVESTIGATING THE CONNECTION BETWEEN INVESTMENT INTENTIONS AND LAND STATUS

Simona Atanasova, Krasimira Kirilova — Wed, 13 Nov 2024 00:00:00 +0200

The subject of investigating the connection between investment intentions and land status is analyzing the main procedures for preparation, approval and implementation of development plans with the objective of changing the purpose designation of agricultural land into urbanized territory. By using a project for a Detailed Development Plans – Plan for Regulation and Construction, an examination is performed of the processes related to the preparation and coordination of the plan, including the change of purpose designation of the agricultural land into land for non-agricultural uses, in accordance with the legislation.

MAP OF THE EARTH MASSES - ROLE IN THE INVESTMENT PROJECT

Ivan Ivanov — Wed, 13 Nov 2024 00:00:00 +0200

Map of the earth masses shows the essence of the vertical planning project by visualizing the anticipated displacement of the land masses within the boundaries of the property. It is the official document through which the designer can determine the amount of land masses for the purpose of their valuation [5]. The article examines the role of the cartogram and modern practices regarding its creation and use in the investment process.

CREATION OF SPECIALIZED MAPS AND REGISTERS OF OBJECTS UNDER ARTICLE 6, PARAGRAPHS 4 AND 5 OF THE LAW ON THE DEVELOPMENT OF THE BLACK SEA COAST

Mirem Niyazi-Yusuf — Wed, 13 Nov 2024 00:00:00 +0200

The specialized maps and registers are made for the purpose of documenting the spatial position and technical characteristics of the sites under Article 6, paragraphs 4 and 5 of the Law on the Organization of the Black Sea Coast. They also provide information for the development of development schemes and general and detailed development plans, protection of the natural landscape and the sea coast from erosion, abrasion and landslide processes, protection of the cultural and historical heritage, development of investment projects, awarding of concession or renting out sea beaches and solving other tasks.

Content of vol. 27, 2024, Journal Scientific and Applied Research

Petar Boyanov — Wed, 13 Nov 2024 00:00:00 +0200

Content of vol. 27, 2024, Journal Scientific and Applied Research

PEDAGOGICAL CHALLENGES IN TEACHING FOLKLORE TO CHILDREN IN NON-FORMAL EDUCATION: A CASE STUDY FROM BULGARIA

Stefka Budakova — Wed, 13 Nov 2024 00:00:00 +0200

This study analyzes data from a survey conducted among non-formal education teachers engaged in teaching folklore to children. It investigates effective practices and challenges these educators encounter in the transmission of folklore traditions to contemporary youth. Drawing on the collected data, the research proposes targeted strategies to enhance and optimize the teaching process, addressing the specific needs of both students and educators within this cultural and pedagogical context.

MIGRATION SECURITY AS A COMPONENT OF CORPORATE SECURITY

Tsvetelina Metodieva, Iliana Simeonova — Wed, 13 Nov 2024 00:00:00 +0200

A new element has been added to the components of corporate security - migration security. The proposed new author's terms for our scientific community - "migration security" will facilitate future research in the field of the impact of migration processes on the security of regions and business organizations.