TITLE
LAND CHANGE DETECTION STUDIES WITH INFORMATION OBTAINED FROM SATELLITE IMAGES

AUTHOR(S)
Egnar Özdikililer, Denis Byalev 

ABSTRACT
Satellite images and remote sensing techniques and algorithms makes it possible for us to obtain information about natural and artificial resources on Earth. Mapping the source distributions and observing the change with the images obtained can be done efficiently and makes it possible to evaluate landcover changes. In this context, a study is presented in which the preliminary studies, editing, classifications and transformations that need to be done, and the operations performed by verifying the images numerically and visually are explained. In the scope of this study you can find literature of obtaining and processing satellite images.

DOI
www.doi.org/10.70456/LJQV7771

PAGES
99-103

DOWNLOAD
https://unitechsp.tugab.bg/images/2023/3-KET/s3_p103_v4-s.pdf

How to cite this article:
Egnar Özdikililer, Denis Byalev, LAND CHANGE DETECTION STUDIES WITH INFORMATION OBTAINED FROM SATELLITE IMAGES, UNITECH – SELECTED PAPERS - 2024, 99-103

TITLE
SIMULATION STUDY OF PARAMETERS AND CHARACTERISTICS OF OPTICAL COMMUNICATION LINE WITH SPECTRAL MULTIPLEXING

AUTHOR(S)
Stanimir Sadinov

ABSTRACT
The report presents the synthesis of a simulation model of an example optical communication line with spectral multiplexing. Results of parameters and characteristics of the optical signals are obtained from the graphic analyzers, which are visualized. Three separate examples with different input signal are used, and the presented tests contribute to the guaranteed efficient operation of the system by conducting a series of measurements to accurately determine all its main parameters with the aim of optimizing any of them.

DOI
www.doi.org/10.70456/FMXS3289

PAGES
93-98

DOWNLOAD
https://unitechsp.tugab.bg/images/2023/3-KET/s3_p101_v1.pdf

How to cite this article:
Stanimir Sadinov, SIMULATION STUDY OF PARAMETERS AND CHARACTERISTICS OF OPTICAL COMMUNICATION LINE WITH SPECTRAL MULTIPLEXING, UNITECH – SELECTED PAPERS - 2024, 93-98

TITLE
ENERGУ EFFICIENCY OF THE TRANSMITTER DVB-T2 SYSTEM-T2 SYSTEM

AUTHOR(S)
Jovan Zlatanovic, Ivana Milosevic, Mirko Milosevic 

ABSTRACT
Today, every little bit of energy is very important. Campaigns and appeals have been made to the public, and incentives have been given to save energy. Ministry of Energy Serbia has analyzed ongoing climate change and increasing energy consumption. The request for energy saving from the Ministry of Energy Serbia has reached to the public enterprises PE ETV (Public enterprises Transmitters and Communications) contributed to saving energy consumption by using innovative technologies and equipment. Our goal is to provide a quality TV and radio signal with as little energy consumption as possible. Broadcasters and end users must be satisfied with that level of signal quality. This research paper describes the analysis of the energy efficiency of transmitters. We had to replace the transmitters with more energy-efficient ones in order to meet modern requirements for mode of operation and rational consumption of energy. We broadcast the DVB-T2 signal with transmitters whose amplifiers have been operated in Doherty configuration

DOI
www.doi.org/10.70456/FZCG8497

PAGES
83-92

DOWNLOAD
https://unitechsp.tugab.bg/images/2023/3-KET/s3_p7_v1.pdf

How to cite this article:
Jovan Zlatanovic, Ivana Milosevic, Mirko Milosevic, ENERGУ EFFICIENCY OF THE TRANSMITTER DVB-T2 SYSTEM-T2 SYSTEM, UNITECH – SELECTED PAPERS - 2024, 83-92

TITLE
DEVELOPMENT OF A CONTROLLER FOR SMALL WIND TURBINES WITH A MOBILE SETUP

AUTHOR(S)
Petar Panayotov, Goran Goranov

ABSTRACT
Controllers for wind generators can be PWM or MPPT. MPPT controllers provide maximum battery charging current while protecting the turbine from damage. Due to the differences of wind turbines, in order for the controller to cope with this task, it is necessary to know the electrical and mechanical characteristics of the wind turbine. This paper proposes a method to automatically capture turbine characteristics at different wind speeds and different loads. The data is sent to a mobile device where the calculations are performed, then the characteristics are sent back to the controller. This is necessary due to the calculation of a large number of linear equations that the controller cannot handle.

DOI
www.doi.org/10.70456/HZOU2747

PAGES
75-80

DOWNLOAD
https://unitechsp.tugab.bg/images/2023/2-EST/s2_p85_v2.pdf

How to cite this article:
Petar Panayotov, Goran Goranov, DEVELOPMENT OF A CONTROLLER FOR SMALL WIND TURBINES WITH A MOBILE SETUP, UNITECH – SELECTED PAPERS - 2024, 75-80