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The diploma thesis is focused on evaluate the efficiency of wastewater treatment plants in the village Veverská Bítýška. Part of the thesis is a literary research, which defines: the basic information about water, wastewater, wastewater treatment and related legislation. Other items of work are characteristic of interest territory and characteristic of selected wastewater treatment plant. In the context of the methodology of the diploma thesis are described selected indicators of water quality and individual determinations in the field and laboratory. Results for the set of indicators of water quality are processed in tables and the graphs, which are accompanied by brief descriptions. Efficiency of wastewater treatment plants is calculated from the acquired measurement results. At the end of the diploma thesis its the overall assessment. Efficiency of wastewater treatment plants always meet the set legislative limits. Values were almost always over 90%.

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The presented thesis, entitled Evaluation of the effectiveness of a selected wastewater treatment plant, deals with the problems of water pollution and available technologies in the area of wastewater treatment. In particular, the thesis compares the effectiveness of root-zone and conventional (mechanical-biological) wastewater treatment plants. For comparison, the following plants were selected: root-zone wastewater treatment plant in Dražovice and classical wastewater treatment plant in Letonice. Both facilities are in the size category of 500 -- 2000 population equivalent. These two adjacent municipalities are located in South Moravia, approximately 32 km east of the city of Brno.

Video on demand (VoD) services are becoming more and more popular today. As high bandwidth communication infrastructure is being established in many countries around the world, high bandwidth communication lines will reach millions of family in the near future. Due to the increasing improvement of communication technology, more and more families enjoy the VoD services which are provided by telecommunication companies and cable TV provider via the Internet. In such a case, scalability and fault tolerance will be the key issues. We propose an architecture for VoD services which is based on multi-server circumstance. In our proposed architecture, each movie is replicated on a subset of the servers. When a server crashes or disconnects from its clients, it is replaced by another server in a transparent way. Regarding of load balancing problem, clients are also migrated from one server to another when a new server is brought up. The benefit of our service is to use common hardware and general network technologies (e.g. TCP/IP). In addition, we provide a machine-independent environment to let the servers and clients execute on any machine through the network. Furthermore, we can get the media players from a web browser by utilizing the cross-platform characteristics of Java. The client host does not need to install any relevant applications. Since Java Media Framework (JMF) provides a unified architecture and messaging protocol for managing the acquisition, processing, and delivery of time-based media data. It can support many standard media content types, such as AIFF, AVI, MIDI, MPEG, QuickTime, and WAV. Using JMF, we can create applets and applications to present, manipulate, and store time-based media.