Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Juraj Machaj"'
Publikováno v:
Applied Sciences, Vol 14, Iss 4, p 1593 (2024)
In the paper, a novel design of a wideband power splitter for a four-element antenna array using two RF antiphase segments is proposed. Based on a detailed analysis of the power splitter circuit, an analytical model was set up in the MATLAB environme
Externí odkaz:
https://doaj.org/article/b045b0dab96b4308b78674f9d4514fd7
Publikováno v:
Sensors, Vol 23, Iss 18, p 7852 (2023)
This paper addresses the limitations of using smartphones in innovative localization systems based on audio signal processing, particularly in the frequency range of 18–22 kHz, due to the lack of technical specifications and noise characterization.
Externí odkaz:
https://doaj.org/article/14d631627a6b43ba85d9317616d8754c
Publikováno v:
Sensors, Vol 23, Iss 6, p 2875 (2023)
In this paper, a report on the development of an Internet of Things (IoT)-based connected university system is presented. There have been multiple smart solutions developed at the university over recent years. However, the user base of these systems
Externí odkaz:
https://doaj.org/article/b1da4f1d064e48819a83b7e4de26cac6
Autor:
Milica Petkovic, Dragana Bajovic, Dejan Vukobratovic, Juraj Machaj, Peter Brida, Graeme McCutcheon, Lina Stankovic, Vladimir Stankovic
Publikováno v:
Sensors, Vol 22, Iss 21, p 8523 (2022)
This paper proposes energy-efficient solutions for the smart light-emitting diode (LED) lighting system, which provides minimal energy consumption while simultaneously satisfying illuminance requirements of the users in a typical office space. In add
Externí odkaz:
https://doaj.org/article/85387dd69ae646938014ad6398bebde8
Publikováno v:
Sensors, Vol 22, Iss 20, p 7912 (2022)
This paper presents an improved IoT-based system designed to help teachers handle lessons in the classroom in line with COVID-19 restrictions. The system counts the number of people in the classroom as well as their distribution within the classroom.
Externí odkaz:
https://doaj.org/article/7f39ac6cb49c4f2c9bb6e5a14c38f737
Publikováno v:
Sensors, Vol 21, Iss 7, p 2283 (2021)
While a vast number of location-based services appeared lately, indoor positioning solutions are developed to provide reliable position information in environments where traditionally used satellite-based positioning systems cannot provide access to
Externí odkaz:
https://doaj.org/article/89aefe00d8a04eca8f817e59b7174679
Autor:
Juraj Machaj, Peter Brida
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 13, Iss 3, Pp 242-248 (2015)
In the paper framework for indoor positioning utilizing Wi-Fi and GSM signals is introduced. Nowadays, indoor positioning is a very attractive topic for researchers, since accurate and reliable positioning system can unlock new market to service prov
Externí odkaz:
https://doaj.org/article/6305524f668048c28358c16c8ecfda3b
Publikováno v:
Sensors, Vol 14, Iss 11, Pp 20274-20296 (2014)
In recent times smart devices have attracted a large number of users. Since many of these devices allow position estimation using Global Navigation Satellite Systems (GNSS) signals, a large number of location-based applications and services have emer
Externí odkaz:
https://doaj.org/article/ccb1f25c25ec42a1ae7245154010cc43
Autor:
Juraj Machaj, Peter Brida
Publikováno v:
Communications, Vol 15, Iss 4, Pp 48-53 (2013)
In the paper device calibration algorithms for indoor positioning systems based on fingerprinting localization framework are discussed and compared. Device calibration should play important role in development of localization systems based on Wi-Fi s
Externí odkaz:
https://doaj.org/article/e32388948d164824aecb94600cf81acf
Autor:
Juraj Machaj, Peter Brida
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 11, Iss 2, Pp 100-107 (2013)
In the present paper the impact of network properties on localization accuracy of Rank Based Fingerprinting algorithm will be investigated. Rank Based Fingerprinting (RBF) will be described in detail together with Nearest Neighbour fingerprinting alg
Externí odkaz:
https://doaj.org/article/ef0e6a9ee20b4df5924857f6caf9fc3b