Optically Reconfigurable RF Circuits using Silicon Switches

Mobile and wireless communications systems have become an important part of our everyday lives. These ubiquitous technologies have a profound effect on how we live. People predict bright future to wireless technologies, but it wouldn’t be possible without a hard work of thousands of scientists in the wireless innovation research arena. My Marie Curie project is investigating enabling technologies for future mobile and wireless communications system

An optically reconfigurable dual-band branch-line coupler with artificial transmission lines

This paper demonstrates switches that achieved a frequency shift of 30% from all switches off to all switches on in both frequency bands. This study shows the advantages of this approach such as high-speed switching, electromagnetic transparency, and thermal and electrical isolation between the coupler and the control circuit. The use of the artificial transmission lines significantly decreases the overall size of the circuit

High–Speed Data Transmission Subsystem of the SEOSAR/PAZ Satellite

This paper analyzes a digital interface and bus system modeling and optimization of the SEOSAR/PAZ Earth Observation satellite. The important part of the satellite is an X–band Synthetic Aperture Radar instrument that integrates 384 Transmit/Receive Modules located in 12 antenna panels 7.5 m away from the central processor and controlled by a synchronous 10 Mbps bidirectional serial protocol. This type of mid–range point–to–multipoint transmission is affected by bit errors due to crosstalk, transmission line attenuation and impedance mismatches. The high–speed data communication network has been designed to optimize the transmission by using a simulation model of the data distribution system which takes into account the worst–case scenario and by developing a lab–scaled prototype which exhibits BER of 10-11 for an interfering signal of 10 Vpp. The result is a point–to–multipoint bidirectional transmission network optimized in both directions with optimal values of loads and equalization resistors. This high–speed data transmission subsystem provides a compact design through a simple solution

Contemporary substitutes of the political economy

The subject of this paper is a critique of the selective theoretical modelings of economic realities, which are monistic (quasi-neoliberal) and mathematical-statistical in nature. In this sense, the theme named Contemporary Substitutes of the Political Economy is defined. The aim of this research is that the above-mentioned modeling of economic reality would be described as a deliberate motion from the analysis and explanation of fundamental economic problems towards secondary issues. Therefore, we characterize them as unfair and programmed ways of fogging the essence of economic problems and crisis. We start from the hypothesis that these modelings replaced and virtually eliminated the former synthesized and useful political- economic analysis. In this paper, we have used a descriptive, comparative methods, panel sample and a schematic logic modeling. The results of our research show that the substitution of political economy by neoclassical and neoliberal economics is performed over a longer period, and through prioritizing the mathematical and statistical econometric analysis. As a proof, we present our selective research panel using a sample of 39 issues from five international journals, which can be found in databases SSCI and Scopus. This research is limited by the unavailability of most journals on the Internet and in printed publications. The application area of the research results is an economic theory. In conclusion, we ascertain the need for greater affirmation of political economy, which in combination with new institutional theory, enables a more realistic view of social and economic reality. © Draskovic M., Lakic S., Draskovic V. Text. 2016

The Status of Agricultural Land as a Natural Resource and the Process of Serbia’s Accession to the EU

This article discusses one specific aspect of the process of Serbia’s EU Accession which refers to liberalisation of the transfer of economic property rights over natural resources, particularly agricultural land. The underlying principles of the free market economy assume free movement of goods, capital and labour. However, there are two existing approaches when analysing transfer of property rights over agricultural land as a natural resource. The first one insists on full liberalisation of the transfer of ownership rights in this area, while the second approach assumes limiting or imposing certain restrictions through national legislation on the free transfer of property rights over agricultural land as a limited national resource and national wealth. Experiences of applying these two approaches within EU member states differ from full liberalisation to significant restrictions on the freedom of agricultural land ownership transfer. In the process of accession negotiations with the EU and in line with a proclaimed interest to join the World Trade Organisation, Serbia has to deal with the issues of liberalisation of trade of agricultural products as well as other national resources including agricultural land. Since the EU regulations do not have any specific requirement in terms of the adoption of a completely liberal approach, it is up to Serbia to decide which model is the most appropriate, considering its own interests. The article defines and discusses arguments which strongly speak in favour of imposing limitations to the full liberalisation of the transfer of property rights over agricultural land as a natural resource in Serbia

Evaluating university academic efficacy: Institutional approach

The aim of the article is to develop methodological approach to university academic performance evaluation on the basis of instruments of institutional economic theory. The novelty of this work is that unlike other methods authors’ method of quantitative evaluation of university academic performance allows for identifying the problems of institutional support of academic activities. During the research authors employed methods of system, logical and economic analysis; empirical information was processed with the help of statistical analysis and correlation analysis methods. As a result authors identified university academic efficacy institutions and suggested efficacy indicators for these institutions. Universities of the Ural Federal area were grouped according to quality parameters of academic efficacy institutions (that is presence of effective institutions, institutional traps, institutional malfunctions). © 2020, Economic Laboratory for Transition Research. All rights reserved.Ministry of Education and Science of the Russian Federation, MinobrnaukaWith the aim of testing the method of evaluating university academic efficacy suggested by the author we conducted the analysis of academic efficacy institutions among the universities of the Ural Federal area. Informational basis of the research is derived from the series of annual informational and analytical collections of works “Academic potential of universities and academic institutions of the Ministry of Education and Science of the Russian Federation”. Informational and analytical collections of works are a database of research, academic, technical and innovative activities of Russian universities for the period from 2009 to 2017. Indicators of state and development of higher education present state and potential are presented on the basis of annual reports on academic and research activities of the universities