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Implementation of multi-purpose system based on LINUX
Fůsek, Lukáš ; Polívka, Michal (referee) ; Pfeifer, Václav (advisor)
The thesis Realization of Multipurpose System on the base of Linux is focused on the selection of suitable distribution of GNU/Linux system for all commonly accessible network services provided by servers and for implementation of suitable authorization process for one server. The first part of the Bachelor thesis acquaints the reader with different operating systems, and their mutual comparison. There are also in detail examined open-source technologies used for HTTP, FTP or mail server services. Further the first part describes the way of sharing data and printers in the network and a possibility of log in the Network by means of Novell client. Second part is focused on practical realization of this server by selected system and by needed applications. There is also in detail described the process of instalation and launching all needed applications.
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Study of thin film catalysts for direct methanol fuel cell anode
Fusek, Lukáš ; Matolín, Vladimír (advisor) ; Nováková, Jaroslava (referee)
This thesis is focused on the study of catalyst layers for direct methanol fuel cell anode prepared by a new method using magnetron sputtering. Homemade as well as commercial supports were used. The study of properties of prepared layers was carried out in fuel cell using methods of electrochemical analysis, such as electrochemical impedance spectroscopy and cyclic voltametry for examination of conductivity, catalyst activity and resistance to poisoning by residual carbon species. Polarization curves were used to investigate power and diffusion properties. A reference cell composed of commercially-available electrodes was chosen for comparison.
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Study of CO and N2 Interaction with Anode Catalysts of Proton-Exchange Membrane Fuel Cells
Fusek, Lukáš ; Matolín, Vladimír (advisor) ; Mysliveček, Josef (referee)
Poisoning of the catalyst seems to be one of the most serious problems preventing a widespread commercialization of fuel cell technology. This thesis focuses on the effect of CO poisoning and hydrogen dilution by nitrogen on performance of fuel cells with low platinum content. Catalysts were deposited by magnetron sputtering directly on membrane etched by plasma. Alloys with different platinum-ruthenium ratio were used to mitigate the CO poisoning. We found that presence of nitrogen has almost negligible effect on the fuel cell performance. On the other hand, CO, even in small concentrations, caused a significant drop in power density. PtRu with atomic ratio 2:1 and 1:1 showed the best CO tolerance.
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Study of thin film catalysts for direct methanol fuel cell anode
Fusek, Lukáš ; Matolín, Vladimír (advisor) ; Nováková, Jaroslava (referee)
This thesis is focused on the study of catalyst layers for direct methanol fuel cell anode prepared by a new method using magnetron sputtering. Homemade as well as commercial supports were used. The study of properties of prepared layers was carried out in fuel cell using methods of electrochemical analysis, such as electrochemical impedance spectroscopy and cyclic voltametry for examination of conductivity, catalyst activity and resistance to poisoning by residual carbon species. Polarization curves were used to investigate power and diffusion properties. A reference cell composed of commercially-available electrodes was chosen for comparison.
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Implementation of multi-purpose system based on LINUX
Fůsek, Lukáš ; Polívka, Michal (referee) ; Pfeifer, Václav (advisor)
The thesis Realization of Multipurpose System on the base of Linux is focused on the selection of suitable distribution of GNU/Linux system for all commonly accessible network services provided by servers and for implementation of suitable authorization process for one server. The first part of the Bachelor thesis acquaints the reader with different operating systems, and their mutual comparison. There are also in detail examined open-source technologies used for HTTP, FTP or mail server services. Further the first part describes the way of sharing data and printers in the network and a possibility of log in the Network by means of Novell client. Second part is focused on practical realization of this server by selected system and by needed applications. There is also in detail described the process of instalation and launching all needed applications.
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