Smart Control of Buck Converters using a Switching-based Clustering Algorithm

This project proposes a new approach to the control of switching voltage regulators (buck converters). The method is performed using a switching-based clustering algorithm. The implementations of competing approaches such as a fuzzy-logic controller, proportional integral derivative controller and a neural network based controller are presented in order to compare and evaluate the performance of the switching-based clustering algorithm. The results of the approach show that the proposed method could improve the stability and the performance of the buck converter system by 2.7% in terms of settling time and by 0.6% in terms of the overshoot value

Bacteriochlorophylls modified at position C-3

[3-Vinyl]-bacteriochlorophyll a and related pigments modified at C-3 and/or C-132 have been synthesized from bacteriochlorophyll a. The reactivity at C-3 is strongly influenced by the C-132 substituent, and vice versa. Spectroscopical data and comparison among derivatives modified at the isocyclic ring indicate that this interaction is related to formation of an intermediate enol(ate) structure. The possible role of enol(ate) formation in (bacterio)chlorophylls in nature is discussed

Smart Control of Buck Converters using a Switching-based Clustering Algorithm

This paper proposes a new approach to the control of switching voltage regulators (buck converters). The method is performed using a switching-based clustering algorithm. The implementations of competing approaches such as a fuzzy-logic controller, proportional integral derivative controller and a neural network based controller are presented in order to compare and evaluate the performance of the switching-based clustering algorithm. The results of the approach show that the proposed method could improve the stability and the performance of the buck converter system by 2.7% in terms of settling time and by 0.6% in terms of the overshoot value as compared to other control methods for buck converters

STUDIES ON PLANT BILE PIGMENTS.

The (4 Z, 10 2, 15Ej-2,3-dihydrobilindione 4, along with the fully unsaturated (E, 2, Z)-analogue 8, has been prepared from the corresponding (Z, Z, Z)-isomer by a variation of Falk's method (Falk et ul., 1980). The photochemical and acid-catalyzed back-reactions have been studied by UV-vis and 'H-NMR spectroscopy

Interdisciplinarnost kulturološko zasnovanega študija slovenistike na Univerzi v Varšavi

V pričujočem prispevku je predstavljen program kulturološkega slovenističnega študija v okviru slavistike, ki ga od leta 2004 izvaja Inštitut za zahodno in južno slavistiko Univerze v Varšavi. V njem so opisane in utemeljene glavne smernice sprememb univerzitetnega poučevanja. Avtorica opiše predvsem meddisciplinarni in medkulturni značaj varšavske slavistike ter načine vključevanja študentov v raziskovalno dejavnost Inštituta.The contribution focuses on the culturological programme of Slovene Studies within Slavic Studies, which has been implemented since 2004 by the Institute of Western and Southern Slavic Studies at the University of Warsaw. The main kinds of changes in university teaching are described and substantiated. The primary goal of this paper is to present the interdisciplinarity and intercultural nature of studies and research at the Warsaw Slavic Studies department and how it involves students in its research activities