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Face masks and respirators as protection against viruses and bacteria
Varga, Michal ; Mišík, Ondrej (referee) ; Lízal, František (advisor)
Pandemic caused by virus SARS-CoV-2 brought high attention to face masks and raised some questions about their filtration efficiency and performance affecting parameters such as high humidity, long term usage, fit factor, or possible decontamination methods for usage prolonging. In this thesis, mechanisms of SARS-CoV-2 transmission and structure and materials of face masks are firstly discussed. Then mechanisms of particle deposition on filter fibers are described. Subsequently standards of surgical masks, cloth masks and respirators are described and compared, with detail on carbon dioxide concentration under respirator. Nanoparticles and their possible effects on enhancing face mask parameters are briefly characterized. Then filtration efficiency and affecting parameters are evaluated. And finally possible decontamination methods for face masks reusability are summarized.
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Overview of the dwvelopment of new reusable space vehicles
Rohánek, Jan ; Junas, Milan (referee) ; Daněk, Vladimír (advisor)
This thesis focuses on the development of reusable space vehicles. The introduction describes history of cosmonautics. Next chapter talks about history of Space Shuttles and then names and compares the most import projects of USA and USSR. Next topic of this thesis is about problematics of reusable rocket carriers. Last chapter names and describes today´s projects of new space shuttles. The conclusion consists of overall assessment and forecast of future reusable space vehicles development.
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Face masks and respirators as protection against viruses and bacteria
Varga, Michal ; Mišík, Ondrej (referee) ; Lízal, František (advisor)
Pandemic caused by virus SARS-CoV-2 brought high attention to face masks and raised some questions about their filtration efficiency and performance affecting parameters such as high humidity, long term usage, fit factor, or possible decontamination methods for usage prolonging. In this thesis, mechanisms of SARS-CoV-2 transmission and structure and materials of face masks are firstly discussed. Then mechanisms of particle deposition on filter fibers are described. Subsequently standards of surgical masks, cloth masks and respirators are described and compared, with detail on carbon dioxide concentration under respirator. Nanoparticles and their possible effects on enhancing face mask parameters are briefly characterized. Then filtration efficiency and affecting parameters are evaluated. And finally possible decontamination methods for face masks reusability are summarized.
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Overview of the dwvelopment of new reusable space vehicles
Rohánek, Jan ; Junas, Milan (referee) ; Daněk, Vladimír (advisor)
This thesis focuses on the development of reusable space vehicles. The introduction describes history of cosmonautics. Next chapter talks about history of Space Shuttles and then names and compares the most import projects of USA and USSR. Next topic of this thesis is about problematics of reusable rocket carriers. Last chapter names and describes today´s projects of new space shuttles. The conclusion consists of overall assessment and forecast of future reusable space vehicles development.
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Evaluating Quality of Service Design
Hejl, Daniel ; Feuerlicht, Jiří (advisor) ; Pavlíčková, Jarmila (referee)
Service Oriented Architecture is a popular choice of system architecture and many organization are moving towards it in order to closely align IT capabilities with their business goals. They are expecting that the implementation of SOA will lead to increased efficiency, the ability to rapidly respond to changing business environments, and significantly improved return on investment. In order to meet these expectations, great emphasis must be given on correct service design. However, designing services in the way that they are highly reusable and the final product is highly maintainable can be especially challenging. This bachelor thesis focuses on summarization of how metrics for measuring structural properties of service oriented software designs can be used for predicting potential problems in service design. In the practical part of this thesis, a tool for evaluating a service design based on coupling between service interfaces was implemented and practical applicability of one of the metric was demonstrated.
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