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        • HYDRAULICS, PNEUMATICS AND HEAT ENGINEERING
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        • TECHNOLOGIES IN TEXTILE PRODUCTIONS
        • SOCIAL SCIENCES, ECONOMY AND MANAGEMENT
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    • UniTech 2023
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    • UniTech 2022
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        • AUTOMATION
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        • HYDRAULICS, PNEUMATICS AND HEAT ENGINEERING AND MECHATRONICS, METROLOGY AND QUALITY MANAGEMENT
        • SOCIAL SCIENCES AND HUMANITIES, ORGANIZATION AND MANAGEMENT, ENTREPRENEURSHIP AND ECONOMY
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    • UniTech 2021
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      • Plenary report
      • THEMATIC SESSION
        • ELECTRICAL ENGINEERING
        • ELECTRONICS AND SENSORS TECHNICS
        • COMMUNICATION ENGINEERING AND TECHNOLOGIES
        • COMPUTER SYSTEMS, COMPUTER TECHNOLOGIES AND AUTOMATION
        • TECHNOLOGIES IN MECHANICAL ENGINEERING AND DESIGN OF MACHINES AND INSTRUMENTS
        • HYDRAULICS, PNEUMATICS AND HEAT ENGINEERING AND MECHATRONICS, METROLOGY AND QUALITY MANAGEMENT
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        • HYDRAULICS, PNEUMATICS AND HEAT ENGINEERING
        • ECONOMIC AND FINANCE, ORGANIZATION ANA MANAGEMENT, EDUCATION TECHNOLOGIES
        • MATHEMATICS AND INFORMATICS
        • PHISICS
    • Unitech 2019
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      • THEMATIC SESSION
        • HYDRAULICS, PNEUMATICS AND HEAT ENGINEERING
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        • ELECTRICAL ENGINEERING
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    • Unitech 2018
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      • THEMATIC SESSION
        • AUTOMATION
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        • ELECTRONICS AND SENSORS TECHNICS
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        • COMPUTER SYSTEMS
        • COMPUTER TECHNOLOGIES
        • DESIGN OF MACHINES AND INSTRUMENTS
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    • Unitech 2017
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      • THEMATIC SESSION
        • AUTOMATION
        • ELECTRICAL ENGINEERING
        • ELECTRONICS AND SENSORS TECHNICS
        • COMMUNICATION ENGENEERING AND TECHNOLOGIES
        • COMPUTER SYSTEMS
        • COMPUTER TECHNOLOGIES
        • DESIGN OF MACHINES AND INSTRUMENTS
        • TECHNOLOGIES IN MECHANICAL ENGINEERING
        • HYDRAULICS, PNEUMATICS AND HEAT ENGINEERING
        • MECHATRONICS, METROLOGY AND QUALITY MANAGEMENT

REACTIVE APPROACH FOR MULTI-AGENT TOURIST GUIDE FOR GABROVO

Papers 2023

TITLE
REACTIVE APPROACH FOR MULTI-AGENT TOURIST GUIDE FOR GABROVO

AUTHOR(S)
Iliya Iliev Nedelchev

ABSTRACT
This paper discusses the use of the multi-agent system Jason as a tool for implementing a tourist guide for Gabrovo. The proposed system aims to provide a personalized and human-centric experience to the tourists by considering their preferences, interests, and current location. The system uses a reactive approach that allows agents to dynamically adapt to changing situations and provide the most relevant information to tourists. The paper argues that the reactive approach is more suitable for human-centric applications like a tourist guides, as it allows the system to respond to the tourists' needs in real-time. Moreover, the system considers the social context of the tourists by incorporating the social norms and customs of Gabrovo. The proposed system
has been evaluated through a user study, which shows that the tourists find it useful and enjoyable. In summary, this paper proposes a multi-agent system Jason for implementing a tourist guide for Gabrovo, which uses a reactive approach that is more human-centric. The system provides personalized and context-aware information to the tourists and has been evaluated positively through a user study.

DOI
http://www.doi.org/10.70456/JUMK3204

PAGES
131-137

DOWNLOAD
https://unitechsp.tugab.bg/images/2023/4-KS/s5_p14_v1.pdf

How to cite this article:
Iliya Iliev Nedelchev, REACTIVE APPROACH FOR MULTI-AGENT TOURIST GUIDE FOR GABROVO, UNITECH – SELECTED PAPERS - 2024, 131-137

AN ANALYSIS OF DIFFERENT CHAINING MODES IN SYMMETRIC CRYPTOGRAPHIC ALGORITHMS APPLIED IN DIGITAL IMAGE TRANSMISSION

Papers 2023

TITLE
AN ANALYSIS OF DIFFERENT CHAINING MODES IN SYMMETRIC CRYPTOGRAPHIC ALGORITHMS APPLIED IN DIGITAL IMAGE TRANSMISSION

AUTHOR(S)
Djordje Sarcevic, Dragan Rudnjanin, Ana Djokic, Hana Stefanovic 

ABSTRACT
In this paper the analysis of the difference between Electronic Code Book (ECB) chaining mode and Cipher Block Chaining (CBC) mode in secure data transmission is given. Advanced Encryption Standard (AES) encryption algorithm is applied while transmitting digital image. Some simulation results, presenting the advantage of using CBC mode, are also provided. A free e-learning software CrypTool is used to create the simulation model and analyze the simulation results.

DOI
www.doi.org/10.70456/GTNE6537

PAGES
127-130

DOWNLOAD
https://unitechsp.tugab.bg/images/2023/4-KS/s4_p170_v3.pdf

How to cite this article:
Djordje Sarcevic, Dragan Rudnjanin, Ana Djokic, Hana Stefanovic, AN ANALYSIS OF DIFFERENT CHAINING MODES IN SYMMETRIC CRYPTOGRAPHIC ALGORITHMS APPLIED IN DIGITAL IMAGE TRANSMISSION, UNITECH – SELECTED PAPERS - 2024, 127-130

POSSIBILITY OF DEMOCRATIZATION OF INTEGRATED CIRCUITS DESIGN FOR EDUCATIONAL AND SMALL PROJECTS

Papers 2023

TITLE
POSSIBILITY OF DEMOCRATIZATION OF INTEGRATED CIRCUITS DESIGN FOR EDUCATIONAL AND SMALL PROJECTS

AUTHOR(S)
Mihailo Knezevic, Zeljko Jovanovic, Milentije Lukovic

ABSTRACT
Since very early stages of software development, concept of open-source and free tools developed by community took important role in pushing software development technologies and techniques forward. Such idea just recently started its development in world of integrated circuits (IC) where proprietary and expensive software and tools still play huge part in industry, practically making it impossible for individuals and small companies to develop their ideas in world of ICs. With ever-rising need for Application Specific Integrated Circuits (ASIC) for budget constrained projects, need for open-source developing tools to support those processes has become very important, in fact, so important that some of the biggest technology companies took part in their development in hope of diversifying available tools for designing and producing ASICs.This paper aims to raise awareness on so far available tools (some of which have long ongoing history) with special focus on Tiny Tapeout, tool specially designed for students and beginners in ASIC digital systems design world to make it as easy as possible to tapeout their first design from scratch.

DOI
www.doi.org/10.70456/WHSG5680

PAGES
115-119

DOWNLOAD
https://unitechsp.tugab.bg/images/2023/4-KS/s4_p69_v6.pdf

How to cite this article:
Mihailo Knezevic, Zeljko Jovanovic, Milentije Lukovic, POSSIBILITY OF DEMOCRATIZATION OF INTEGRATED CIRCUITS DESIGN FOR EDUCATIONAL AND SMALL PROJECTS, UNITECH – SELECTED PAPERS - 2024, 115-119

COMPARISON OF ETL EXECUTION SPEEDS WHEN USING SQL CODE AND WHEN USING SSIS BUILT IN COMPONENTS

Papers 2023

TITLE
COMPARISON OF ETL EXECUTION SPEEDS WHEN USING SQL CODE AND WHEN USING SSIS BUILT IN COMPONENTS

AUTHOR(S)
Slaviša Vučetić, Slaviša Ilić, Slavica Savić, Siniša Ilić

ABSTRACT
In this paper, we compare the execution speed of the ETL (Extract, Transform and Load) process, when it is implemented using SQL language code in the first case, and when it is implemented using the ETL tool SSIS (SQL Server Integration Services) in the second case. In the first case we present an example of how to extract data and perform certain transformations to data from tables of the source database by direct executing SQL code, and load the transformed data into a destination database. In the second case, we extract and transform the same data, but using the built in components of the SSIS ETL tool without the need to write any command. The main goal of the paper is to compare the execution speeds for running ETL job in both ways, and to obtain the order of magnitude of time needed to transfer and transform data from OLTP source to OLAP destination systems.

DOI
www.doi.org/10.70456/QMXD2316

PAGES
120-126

DOWNLOAD
https://unitechsp.tugab.bg/images/2023/1-EE/s1_p9_v6.pdf

How to cite this article:
Slaviša Vučetić, Slaviša Ilić, Slavica Savić, Siniša Ilić, COMPARISON OF ETL EXECUTION SPEEDS WHEN USING SQL CODE AND WHEN USING SSIS BUILT IN COMPONENTS, UNITECH – SELECTED PAPERS - 2024, 120-126

TIME SYNCHRONIZATION IN LORA WIRELESS NETWORKS

Papers 2023

TITLE
TIME SYNCHRONIZATION IN LORA WIRELESS NETWORKS

AUTHOR(S)
Slađana Đurašević Pešović, Uroš Pešović

ABSTRACT
LoRa technology has brought significant improvements in terms of range and resistance to interference, which has significantly expanded the field of application of wireless sensor networks (WSN) to larger geographical areas. Time synchronization is a significant problem in WSN since it is necessary to synchronize the local clocks of a large number of sensor nodes with sufficient accuracy. Since communication in WSN is performed at low data rates and nodes spend a lot of time in a low-power modes, it becomes challenging to maintain time synchronization between nodes under such conditions. This paper presents the method of time synchronization between WSN network nodes using LoRa technology, and based on measurements, the expecte synchronization accuracy is determined in the case of crystal resonators and crystal oscillators, which are most often used as clock sources in WSN nodes.

DOI
www.doi.org/10.70456/QSBC9148

PAGES
108-112

DOWNLOAD
https://unitechsp.tugab.bg/images/2023/3-KET/s3_p114_v2.pdf

How to cite this article:
Slađana Đurašević Pešović, Uroš Pešović, TIME SYNCHRONIZATION IN LORA WIRELESS NETWORKS, UNITECH – SELECTED PAPERS - 2024, 108-112

  1. TYPES OF REMOTE SENSING ANALYSIS IN DISASTER MANAGEMENT AND LANDSLIDE IDENTIFICATION
  2. LAND CHANGE DETECTION STUDIES WITH INFORMATION OBTAINED FROM SATELLITE IMAGES
  3. SIMULATION STUDY OF PARAMETERS AND CHARACTERISTICS OF OPTICAL COMMUNICATION LINE WITH SPECTRAL MULTIPLEXING
  4. ENERGУ EFFICIENCY OF THE TRANSMITTER DVB-T2 SYSTEM

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    • UniTech 2024
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      • THEMATIC SESSION
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    • UniTech 2023
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      • THEMATIC SESSION
        • ELECTRICAL ENGINEERING
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        • COMMUNICATION ENGINEERING AND TECHNOLOGIES
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    • UniTech 2022
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      • THEMATIC SESSION
        • ELECTRICAL ENGINEERING
        • ELECTRONICS AND SENSORS TECHNICS
        • COMMUNICATION ENGINEERING AND TECHNOLOGIES
        • COMPUTER SYSTEMS, COMPUTER TECHNOLOGIES AND INFORMATION SECURITY
        • AUTOMATION
        • TECHNOLOGIES IN MECHANICAL ENGINEERING AND DESIGN OF MACHINES AND INSTRUMENTS
        • HYDRAULICS, PNEUMATICS AND HEAT ENGINEERING AND MECHATRONICS, METROLOGY AND QUALITY MANAGEMENT
        • SOCIAL SCIENCES AND HUMANITIES, ORGANIZATION AND MANAGEMENT, ENTREPRENEURSHIP AND ECONOMY
        • EDUCATIONAL TECHNOLOGIES
        • CHEMISTRY, PHYSICS AND ECOLOGY
    • UniTech 2021
      • Book cover
      • Title page
      • Plenary report
      • THEMATIC SESSION
        • ELECTRICAL ENGINEERING
        • ELECTRONICS AND SENSORS TECHNICS
        • COMMUNICATION ENGINEERING AND TECHNOLOGIES
        • COMPUTER SYSTEMS, COMPUTER TECHNOLOGIES AND AUTOMATION
        • TECHNOLOGIES IN MECHANICAL ENGINEERING AND DESIGN OF MACHINES AND INSTRUMENTS
        • HYDRAULICS, PNEUMATICS AND HEAT ENGINEERING AND MECHATRONICS, METROLOGY AND QUALITY MANAGEMENT
        • SOCIAL SCIENCES AND HUMANITIES, ORGANIZATION AND MANAGEMENT, EDUCATIONAL TECHNOLOGIES, ЕNTREPRENEURSHIP AND ECONOMY
        • CHEMISTRY, PHYSICS AND ECOLOGY
    • Unitech 2020
      • Book cover
      • Title page
      • Plenary report
      • THEMATIC SESSION
        • ELECTRICAL ENGINEERING
        • ELECTRONICS AND SENSORS TECHNICS
        • COMMUNICATION ENGENEERING AND TECHNOLOGIES
        • COMPUTER SYSTEMS
        • COMPUTER TECHNOLOGIES
        • TECHNOLOGIES IN MECHANICAL ENGINEERING AND MECHATRONICS, METROLOGY AND QUALITY MANAGEMENT
        • HYDRAULICS, PNEUMATICS AND HEAT ENGINEERING
        • ECONOMIC AND FINANCE, ORGANIZATION ANA MANAGEMENT, EDUCATION TECHNOLOGIES
        • MATHEMATICS AND INFORMATICS
        • PHISICS
    • Unitech 2019
      • Book cover
      • Title page
      • Plenary report
      • THEMATIC SESSION
        • HYDRAULICS, PNEUMATICS AND HEAT ENGINEERING
        • MECHATRONICS, METROLOGY AND QUALITY MANAGEMENT
        • ELECTRICAL ENGINEERING
        • ELECTRONICS AND SENSORS TECHNICS
        • COMMUNICATION ENGENEERING AND TECHNOLOGIES
        • COMPUTER SYSTEMS
        • COMPUTER TECHNOLOGIES
        • AUTOMATION
        • DESIGN OF MACHINES AND INSTRUMENTS
        • MATHEMATICS AND INFORMATICS
    • Unitech 2018
      • Book cover
      • Title page
      • Plenary report
      • THEMATIC SESSION
        • AUTOMATION
        • ELECTRICAL ENGINEERING
        • ELECTRONICS AND SENSORS TECHNICS
        • COMMUNICATION ENGENEERING AND TECHNOLOGIES
        • COMPUTER SYSTEMS
        • COMPUTER TECHNOLOGIES
        • DESIGN OF MACHINES AND INSTRUMENTS
        • HYDRAULICS, PNEUMATICS AND HEAT ENGINEERING
        • MATHEMATICS AND INFORMATICS
        • MECHATRONICS, METROLOGY AND QUALITY MANAGEMENT
        • EDUCATIONAL TEHNOLOGIES
        • CHEMISTRY AND ECOLOGY
        • PHISICS
    • Unitech 2017
      • Book cover
      • Title page
      • Plenary report
      • THEMATIC SESSION
        • AUTOMATION
        • ELECTRICAL ENGINEERING
        • ELECTRONICS AND SENSORS TECHNICS
        • COMMUNICATION ENGENEERING AND TECHNOLOGIES
        • COMPUTER SYSTEMS
        • COMPUTER TECHNOLOGIES
        • DESIGN OF MACHINES AND INSTRUMENTS
        • TECHNOLOGIES IN MECHANICAL ENGINEERING
        • HYDRAULICS, PNEUMATICS AND HEAT ENGINEERING
        • MECHATRONICS, METROLOGY AND QUALITY MANAGEMENT