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Macromolecular avenues for the creation of bio-inspired hierarchically structured surfaces
Wang, Yu-Min ; Pop-Georgievski, Ognen (advisor) ; Kostka, Libor (referee) ; Sedláček, Ondřej (referee)
Biomedical applications often rely on surface adherent architectures such as polymer brushes to prevent adverse nonspecific interactions between materials used in biomedicine and contacting biological fluids. Commonly, "grafting-to" (GT) and "grafting-from" (GF) methods are used to attain the polymer brush architecture on various surfaces. This study investigates the grafting density and antifouling effectiveness of poly[N-(2-hydroxypropyl) methacrylamide] (poly(HPMA)) brushes synthesized via reversible addition-fragmentation chain-transfer (RAFT) polymerization, employing both GT and GF techniques. To determine the molar masses of solution-born and GF poly(HPMA), size exclusion chromatography (SEC) equipped with multiple angle laser light scattering (MALS) and atomic force microscopy (AFM)-based single-molecule force spectroscopy (SMFS) were combined and thoroughly used. Furthermore, the impact of solvent effects on polymer brush propagation kinetics during the concomitant surface-initiated- (SI-) RAFT process between surface and solution was investigated. Experimental findings revealed discrepancies between GF and solution-born poly(HPMA) chains. Notably, solvent composition influenced both the propagation rate and the inferred grafting density of surface-grafted poly(HPMA) due to variations in...
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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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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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Study of sewerage in village Nasavrky
Sedláček, Ondřej ; Beránek, Josef (referee) ; Raclavský, Jaroslav (advisor)
The author of master's thesis submit study of alternative solution sewerage in Nasarvky. He made passportization and he design gravity, pressure and vacuum sewerage for the area of interest. He deals with the problems about storm sewerage and he design suitable solution. The study content issues technical and economic variants valorization. Object of study is recommendation the best alternative sewerage in Nasavrky.
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SiOx based barrier coatings
Sedláček, Ondřej ; Dzik, Petr (referee) ; Přikryl, Radek (advisor)
The theme of this thesis is based on the preparation and characterization thin films prepared by methods like a Physical Vapor Deposition, Plasma Assisted Vapor Deposition and Plasma Enhanced Chemical Vapor Deposition. The elementary materials for the preparation of these layers are silicon monooxide powder, melamine and hexamethyldisiloxane. These layers have been prepared with regards to their usage like a barrier coatings with emphasis on poisonous organic substances resistance.. We made a characterization of these films. This characterization is consist of researching of their physical properties (the ability to resist permeation of certain organic compounds), and their chemical composition too. We used to some specific method for these characteristics, for example: FTIR, OTR, ellipsometry, SEM and measuring of the permeation of selected industrial pollutants resistance.
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Multilayer barrier coatings
Sedláček, Ondřej ; Mazánková, Věra (referee) ; Přikryl, Radek (advisor)
The theme of this work is the preparation and characterization of multilayer barrier coatings to polymer and metal substrates based on SiOx and organic molecules. It deals with the determination of their properties in terms of oxygen permeability and corrosion protection. The starting materials for the preparation of these layers are hexamethyldisiloxane, octafluorocyclobutane and 4,12-dichloro[2.2]paracyclophane. These layers have been prepared with regard to their use as barrier coatings for use in archeology, with the focus on corrosion protection of coated items and other specific requirements museums. For these samples was realized characteristic of both in terms of their physical properties – the ability to resist permeation of oxygen and in terms of their chemical composition. The fourier transformation infrared spectroscopy (FTIR), scanning elektron microscopy (SEM), oxygen transmission rate (OTR), contac angle measurement and corrosion testing were used for the above-mentioned characterisations.
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Natural drop structure on Morávka river after 4 years functioning
Sedláček, Ondřej ; Veselý,, Jaroslav (referee) ; Zachoval, Zbyněk (advisor)
The author of bachelor’s thesis deals construction local river widening. For a better understanding of the text he perform search retrieval basis of hydraulics and result research dealing with the local river widening. The next section he deals with facility to processing and evaluation data. In the practical part he describe nature drop structure on the Morávka river, where he compare original state with actual state after four years functioning and he recommend changes and repairs.
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Block of flats, Újezd u Brna
Sedláček, Ondřej ; Macků, Michal (referee) ; Müller, Jan (advisor)
This work deals with a new building – block of flats on land no. 1799/1, 1800/1 cadastral Újezd u Brna, region Brno - venkov. This building contains 15 individual flats. The object is geometrically divided on central part with gabled roof and 2 side parts with hip roof. Slopes of roofs 10°. Building is designed as three-storey object without a cellarage, whence all three storeys are residential . The building is accessible from local road and it is possible to park a car next to the object in new-build parking place. Residential rooms are positively rotated to south and ventilated naturally. All the residential rooms are exposed to direct day light. Sidewalk and hard surface are treated as concrete and scrubbed pavement. Construction peripheral bearing masonry, interior bearing masonry and cross buntons effected from ceramic breeze-block POROTHERM. Ceilings plates are made of reinforced concrete. Staircase are made of reinforced concrete as well.
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Analysis of the conflict in Nagorno-Karabakh 2020
Sedláček, Ondřej ; Horák, Slavomír (advisor) ; Brisku, Adrian (referee)
The bachelor's thesis analyses the Nagorno-Karabakh conflict that took place in 2020. Coexistence between Armenians and Azerbaijanis in the region has become almost impossible after the conflict of the 1990s. Azerbaijan's occupation of internationally recognised territory and the subsequent stalemate over the future of Nagorno-Karabakh led to renewed military escalation. The thesis focuses in particular on the role of the two main allies of each actor in the conflict and the impact on the resulting geopolitical position in the region. On the Armenian side, the role of Russia and for Azerbaijan the support of Turkey. The aim of the thesis was to identify how the position of Russia and Turkey in the region changed after the abovementioned military conflict. The sector method was used as the initial method for this analysis and the Copenhagen School of Security Studies was the inspiration. In this thesis, the influence of the states under study was examined in each sector. Furthermore, taking into account the outcome of the war, the recognition was reached that Turkish influence in the region has significantly increased and will continue to play a key role in the future.
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Differences in the behaviour of urban and rural populations of mammals
Kučerová, Nikola ; Štolhoferová, Iveta (advisor) ; Sedláček, Ondřej (referee)
My bachelor thesis deals with the differences in the behavior of mammals, especially carnivores, primates, and rodents living in urban environments and their rural dwelling relatives. Human-induced landscape change often results in fragmentation and decline in the populations of animals living there. However, it can also contribute to the emergence of various new traits that might help the species successfully inhabit the environment affected by humans and their activity. The aim of this thesis is to determine whether populations of urban and rural mammals differ, especially regarding their activity, aggression, boldness, and exploration. To do so, I will focus on comparison of behavior of urban and rural populations of the same species.
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