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Dusan Maga
Czech Technical University in Prague, Faculty of Electrical Engineering, Department of Telecommunication Engineering, Technická 1902/2, Praha 6, CZ-166 27 Prague, Czech Republic

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Journal article
Published: 26 August 2021 in Energies
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Increasing the efficiency of the solar energy harvesting system is an urgent need in light of the climate changes we live in nowadays. The most significant data to be processed in the photovoltaic harvesters are the curve of solar radiation intensity to achieve the maximum benefits of the solar incident light. This processing contains complicated procedures, and the used algorithms are also high computational power-consuming which makes using special software and high potential hardware essential requirements. An explanation of the Minimum Energy Effect method is presented in this article. Our proposed algorithm uses this method to provide a simple and high-accuracy mathematical tool for generating a simple alternative curve instead of the complicated original nonlinear curve of solar radiation intensity. The produced curve is suitable for further operations, such as derivatives, integrals, or even simple addition/subtraction. Our algorithm provides a gradual procedure to find an optimum solution of the equation system, unlike the iterative methods. In addition, the results of analyzing the effect of time-division density showed the relationship between the speed of solving the task and the accuracy of results.

ACS Style

Dusan Maga; Jaromir Hrad; Jiri Hajek; Akeel Othman. Application of Minimum Energy Effect to Numerical Reconstruction of Insolation Curves. Energies 2021, 14, 5313 .

AMA Style

Dusan Maga, Jaromir Hrad, Jiri Hajek, Akeel Othman. Application of Minimum Energy Effect to Numerical Reconstruction of Insolation Curves. Energies. 2021; 14 (17):5313.

Chicago/Turabian Style

Dusan Maga; Jaromir Hrad; Jiri Hajek; Akeel Othman. 2021. "Application of Minimum Energy Effect to Numerical Reconstruction of Insolation Curves." Energies 14, no. 17: 5313.

Journal article
Published: 26 February 2018 in Sustainability
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The efficient utilization of energy sources seems to be one of the most challenging problems for designers and scientists alike. This challenge particularly applies to power electronics, where the increasing value of energy density leads to demands for optimization processes and better exploitation (and distribution) of available power sources. As a result, the implementation of frequency-controlled systems is more often in the spotlight. The systems with doubly fed induction machines and a frequency converter in the rotor circuit are typical representatives of these demands. In a wide spectrum of power electronic systems, frequency converters are often used that have a constant current, a diode rectifier, and a thyristor inverter. This article provides a novel approach to modeling methodology, and presents a unique comparison of four different frequency converter schemes that are connected to a doubly fed induction machine. This article presents the modeling methodology itself, as well as the results based on an asynchronous generator motor fed by different frequency converters, a spectral analysis of the output voltage of the used frequency converters, and a comparison of the different technologies. Based on the above, this paper recommends the use of a multistage-multilevel frequency converter scheme.

ACS Style

Tarek Nahdi; Dusan Maga. Comparative Study of Frequency Converters for Doubly Fed Induction Machines. Sustainability 2018, 10, 594 .

AMA Style

Tarek Nahdi, Dusan Maga. Comparative Study of Frequency Converters for Doubly Fed Induction Machines. Sustainability. 2018; 10 (3):594.

Chicago/Turabian Style

Tarek Nahdi; Dusan Maga. 2018. "Comparative Study of Frequency Converters for Doubly Fed Induction Machines." Sustainability 10, no. 3: 594.

Book chapter
Published: 03 November 2015 in Advances in Intelligent Systems and Computing
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CedupointTM (Continuing Education Point) is an integral part of the Department of Telecommunication Engineering at the Czech Technical University in Prague, Faculty of Electrical Engineering. Due to its mission, it provides a lot of activities focused on promotion of university education techniques and technologies to primary and secondary schools. The activity presented in this paper is based on introduction of touchscreen devices (tablets) into education at small- and medium-sized primary and secondary schools. The paper presents a summary of all related activities and provides an overview of relevant technologies and technical solutions as well as fundamental ideas of the designed education program; nevertheless, it is focused on the major activity related to classroom management systems designed for teachers of these schools.

ACS Style

Dusan Maga; Boris Simak. 21st Century Lecturer – from University to Secondary and Primary Schools. Advances in Intelligent Systems and Computing 2015, 231 -236.

AMA Style

Dusan Maga, Boris Simak. 21st Century Lecturer – from University to Secondary and Primary Schools. Advances in Intelligent Systems and Computing. 2015; ():231-236.

Chicago/Turabian Style

Dusan Maga; Boris Simak. 2015. "21st Century Lecturer – from University to Secondary and Primary Schools." Advances in Intelligent Systems and Computing , no. : 231-236.

Conference paper
Published: 30 August 2021
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ACS Style

Amr Al-Awamry; Dusan Maga; Tarek Nahdi. Energy Consumption of Wirless Sensor Network. 2021, 1 .

AMA Style

Amr Al-Awamry, Dusan Maga, Tarek Nahdi. Energy Consumption of Wirless Sensor Network. . 2021; ():1.

Chicago/Turabian Style

Amr Al-Awamry; Dusan Maga; Tarek Nahdi. 2021. "Energy Consumption of Wirless Sensor Network." , no. : 1.