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Návrh analogových kmitočtových filtrů s využitím grafů signálových toků / Analog frequency filter design using signal flow graphsPetlák, Martin January 2008 (has links)
In my graduation thesis I first of all shortly mentioned frequency–selection filters and their utilisations. However, the base point of this project was to acquaint with different types of signal flow diagrams with whom I should design and analyse frequency-selection filtres with conventional and also innovative active components. As the first I created signal flow diagrams for both voltage and current conveyors. These modern active components are well known today and enable the construction of circuits with better properties than circuits with traditional differentiating amplifiers with voltage feedback. Thereinafter I made signal flow diagrams for OTA component. Transconductancal amplifiers are well known active components used in various areas of analog signal processing. OTA amplifier is in fact the current source controlled by voltage difference, which is characterised by gm transconductance. Ulterior components were IOZ and IZN models of voltage amplifier with voltage gain A. The last component was COA amplifier. It is a current operational amplifier. COA model is fully dual component to VOA, which is classical voltage amplifier. In my project I used filters with two OTA components. This filter offers functions like low-pass filter, band-pass filter, high-pass filter, band-stop filter and two-phase network. Following this I used circuits with two GCC conveyors. These offer band-pass filter, low-pass filter, high-pass filter, band-stop filter and two-phase network. Ultimately I designed filters with COA components, which offer three transmission functions simultaneously (DP, PP and HP). Analysis of these filters was made with a help of PSpice computer programme.
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Actor Alone: Solo Performance in New ZealandParker, George January 2008 (has links)
This thesis explores solo performance in New Zealand. That solo performance has been widely used in New Zealand's relatively brief theatre history is usually ascribed to the economy, manoeuvrability and adaptability of the form - common reasons for the popularity of solo performance elsewhere as well. But this thesis considers solo performance as a kind of theatre that has been suited to New Zealand in a distinctive way. In particular, I argue that solo performance has emerged on the margins of mainstream theatre in New Zealand as a means of actively engaging with a sense of isolation that typifies the post-colonial New Zealand experience. The ability of the solo performance to move between remote rural settlements and urban centres has connected these New Zealand communities in a way that is unusual for theatre in New Zealand. Furthermore, a solo performer speaking directly to an audience about the experience of living in New Zealand allows for an intimate interaction with a traditionally stoic and laconic masculine society. In this thesis, I make a case for three solo performances where it is possible to see, in the representation of a search for what it means to be a New Zealander, a theatrical contribution to nation-building: The End of the Golden Weather (1959), Coaltown Blues (1984) and Michael James Manaia (1991). However, in a subsequent chapter, I look at solo performances in New Zealand that might better be understood within global movements such as feminism and multiculturalism. I argue that this shift has depleted the power that the form once held to comment upon New Zealand identity and to assist in the search for national identity. I conclude the thesis by considering how ongoing theatre practice may be informed by the experience of solo performance in New Zealand.
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