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This paper presents a cascaded H-bridge multilevel inverter with single DC source. Generally, each phase of the multilevel inverter requires ‘n’ number of DC sources for 2n+1 level. In this paper we have proposed a multilevel topology which requires only one DC source for all the three phases and other sources are replaced by ultra capacitors. Initially, the performance of multi level inverter has been studied by including all DC sources. Finally a single DC source is allowed and remaining n-1 DC sources are replaced by ultra capacitors. An adaptive PI controller is introduced for automatically maintaining the voltage level of capacitor and we use higher number of output levels to increase the quality of power. Comparison between both the cascaded multilevel inverter using DC source and ultracapacitor as source has been studied and it shows that the overall performance of ultracapacitor source is better than that of DC source. An experiment has been performed and the result shows that the proposed system is suitable for medium power applications.

Experiments play the decisive role in knowledge acquisition in physics education. Remote experimentation is one of the possibilities to conduct experimental activities at all levels of education. In the paper, we present the example of the utilization of remote experiments - real and virtual - in secondary school physics education. The education activities were designed in accordance with the strategy of education Integrated e-Learning. Here, the students' active participation in education process is crucial. As real remote and virtual experiments are the basic components of the strategy, we also present the experiments used in the education - the real remote experiment 'Source of DC voltage' (http://remotelab7.truni.sk) and the virtual experiment 'Circuit Construction Kit' (http://phet.colorado.edu/en/simulation/circuit- construction-kitac-virtual-lab). © 2013 IEEE.

Experiments play the decisive role in knowledge acquisition in physics education. Remote experimentation is one of the possibilities to conduct experimental activities at all levels of education. In the paper, we present the example of the utilization of remote experiments - real and virtual - in secondary school physics education. The education activities were designed in accordance with the strategy of education Integrated e-Learning. Here, the students' active participation in education process is crucial. As real remote and virtual experiments are the basic components of the strategy, we also present the experiments used in the education - the real remote experiment 'Source of DC voltage' (http://remotelab7.truni.sk) and the virtual experiment 'Circuit Construction Kit' (http://phet.colorado.edu/en/simulation/circuit- construction-kitac-virtual-lab). © 2013 IEEE.

Tato práce se zabývá návrhem a realizací řízení a monitorování statické zdrojovny přes ethernet. Popisem jednotlivých objektů a zařízení, které jsou umístěny ve zdrojovně. Návrhem a realizací systému pro kontrolu přístupů jednotlivých uživatelů., This project deals with design and implementation of management and monitoring of static power source via ethernet. Description of individual objects and instalations which are located in static power source. Design and implementation of a system for access control of individual users.

Tato práce se zabývá návrhem a realizací řízení a monitorování statické zdrojovny přes ethernet. Popisem jednotlivých objektů a zařízení, které jsou umístěny ve zdrojovně. Návrhem a realizací systému pro kontrolu přístupů jednotlivých uživatelů., This project deals with design and implementation of management and monitoring of static power source via ethernet. Description of individual objects and instalations which are located in static power source. Design and implementation of a system for access control of individual users.

Tato práce se zabývá návrhem a realizací řízení a monitorování statické zdrojovny přes ethernet. Popisem jednotlivých objektů a zařízení, které jsou umístěny ve zdrojovně. Návrhem a realizací systému pro kontrolu přístupů jednotlivých uživatelů., This project deals with design and implementation of management and monitoring of static power source via ethernet. Description of individual objects and instalations which are located in static power source. Design and implementation of a system for access control of individual users.

Tato práce se zabývá návrhem a realizací řízení a monitorování statické zdrojovny přes ethernet. Popisem jednotlivých objektů a zařízení, které jsou umístěny ve zdrojovně. Návrhem a realizací systému pro kontrolu přístupů jednotlivých uživatelů., This project deals with design and implementation of management and monitoring of static power source via ethernet. Description of individual objects and instalations which are located in static power source. Design and implementation of a system for access control of individual users.

Tato práce se zabývá návrhem a realizací řízení a monitorování statické zdrojovny přes ethernet. Popisem jednotlivých objektů a zařízení, které jsou umístěny ve zdrojovně. Návrhem a realizací systému pro kontrolu přístupů jednotlivých uživatelů., This project deals with design and implementation of management and monitoring of static power source via ethernet. Description of individual objects and instalations which are located in static power source. Design and implementation of a system for access control of individual users.

Tato práce se zabývá návrhem a realizací řízení a monitorování statické zdrojovny přes ethernet. Popisem jednotlivých objektů a zařízení, které jsou umístěny ve zdrojovně. Návrhem a realizací systému pro kontrolu přístupů jednotlivých uživatelů., This project deals with design and implementation of management and monitoring of static power source via ethernet. Description of individual objects and instalations which are located in static power source. Design and implementation of a system for access control of individual users.