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Information Fusion for Classification of Network Devices
Sedláček, Ondřej ; Tisovčík, Peter (referee) ; Žádník, Martin (advisor)
This work is focused on solving information fusion when dealing with multiple data sources in computer network monitoring. A solution built on the concept of classification rules configured by experts is presented. Configuration is simplified using a designated configuration language interpreted by the solution. The classification rules enable coverage of diverse types of data. The result is given as a label from specified taxonomy. Using a taxonomy maintains the different levels of detail between the data sources, even in the output label. The solution also uses the Dempster-Schafer theory for merging labels from different sources into a single output label. Results of experiments show that information fusion in this context does increase the accuracy of device classification. A process of rule optimization was developed based on testing and experiments with a dataset from a real network. The accuracy was increased by 19 % compared to the original solution using this process.
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Preparation and implementation of construction and technical survey of prestressed bridge structure
Kubová, Klaudie ; Sedláček, Ondřej (referee) ; Anton, Ondřej (advisor)
The bachelor's thesis deals with the technical survey of the load-bearing structure of the left part of prestressed motorway bridge D2-058..2. The bridge is located on the border between the Czechia and Slovakia, and it was built in 1980. The work is focused on locating the prestressing reinforcement of prefabricated beams and determining its condition. The theoretical part describes the principle of static action of reinforced and prestressed concrete, categorization of technical surveys of structures and diagnostic methods. The work also presents specific diagnostic methods for determining the position and condition of prestressing reinforcement. In the practical part, the work deals with the analysis of beams by means of ground penetrating radar and probes for analysis of the condition of reinforcement. The outcome of the work is a study of the deviations of the position of prestressing cables from the original project documentation and determination of their condition in terms of corrosion degree and grouting.
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Porous polymer networks prepared from ethynylpyridines
Titlová, Štěpánka ; Sedláček, Jan (advisor) ; Sedláček, Ondřej (referee)
Series of new micro/mesoporous polymer networks with high content of pyridine segments was prepared. For the preparation were used ethynylpyridine type of monomers which were successfully homopolymerized and copolymerized with hydrocarbon diethynylarenes by chain-growth coordination polymerization catalyzed with [Rh(NBD)acac] complex. Polymerizations provided polyacetylene networks with main chains densely cross- linked by pyridine or arylene links. Prepared pyridine networks showed specific surface area SBET from 308 m2 /g to 923 m2 /g and variable content of pyridine segments in an interval from 3,27 mmol/g to 7,86 mmol/g. In networks, pyridine segments made part of interchain links or side groups. Networks with pyridine segments were successfully quaternized by heterogeneous postpolymerization reaction with bromoethane to form well covalently defined networks containing N-ethylpyridinium segments. Quaternized networks containing pyridinim segments in amount from 2,41 mmol/g to 4,24 mmol/g had preserved micro/mesoporous texture with values of SBET from 331 m2 /g to 592 m2 /g. Polyacetylene networks with N-ethylpyridinium segments were prepared also by catalyst-free (spontaneous) quaternization polymerization of diethylpyridines. These networks were worse covalently defined and had proved lower...
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Cross-taxon congruence in species diversity in non-forest habitats
Hřebíková, Veronika ; Sedláček, Ondřej (advisor) ; Černý, Martin (referee)
Estimating of the overall species diversity at any place on Earth is very difficult. Generally, we use only several surrogate taxa for predicting of species diversity of other groups. Typically, these surrogates are represented by well observable and conspicuous organisms (e.g. plants, butterflies, large beetles, birds). The first part of my theses presents the basic insight in the species concepts used in biodiversity conservation - umbrella, indicator, flagship, and surrogate species. The second part focuses on the use of these concepts in practice. I discuss the conclusion of studies that focus on evaluation of species concepts in biodiversity conservation, with a special regard on non-forest habitats. In the last chapter, I deal with the impact of management practices in non-forest habitats on different taxa of organisms. KEYWORDS: biodiversity, keystone species, umbrella species, flagship species, surrogate species, non-forest biotops, management
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