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Li-ion traction battery 28V/40Ah for an electric bike
Bartošek, Martin ; Červinka, Dalibor (referee) ; Vorel, Pavel (advisor)
Thes is deals with the construction, protective circuits and lifetime of lithium ion batteries intented for powering electric bicycles. The entire battery is composed of Li-ion cells with the designation 18650 from Sanyo company, which are connected via series-parallel combination. Because of the series connection of the cells, it is necessary to add protective circuit to each cell to prevent overcharging or deep discharging, on which Li-ion cells are very sensitive. Absence of these circuits could cause irreversible damage to the entire battery pack. Life of Li-ion cells depends on many aspects. These aspects have an influence on the electric bicycle itself. They have an impact on the range and the number of charging and discharging cycles against the considerably high price of the battery.
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Non-sporting Topics on TV Studios of ČT sport and TV Nova During the World Cup 2022
Bartošek, Martin ; Němcová Tejkalová, Alice (advisor) ; Macková, Veronika (referee)
Bachelor thesis Non-sporting Topics on TV Studios of ČT sport and TV Nova during the FIFA World Cup Qatar 2022 deals with non-sporting topics in the pre-match studios of ČT sport and TV Nova during the FIFA World Cup Qatar 2022. The selected pair of media outlets represent the only owners of the broadcasting rights for the the FIFA World Cup Qatar 2022 in the Czech Republic. It is also a comparison of sport's broadcasting on public and commercial TV. The research is conducted during the entire course of the football championship, that is all pre-match studios of both TV stations from 20th November to 18th December 2022. The theoretical part focuses on the position of sport and football in media. It also describes selected non-sporting topics from the history of sports journalism as well as the FIFA World Cup Qatar 2022. The quantitative content analysis identifies and compares the total time spent debating non-sporting topics with the rest of the sports discussion. It also follows the incidence and frequency of non-sporting topics on ČT sport and TV Nova. The qualitative content analysis attempts to describe the process of these non-sporting discussions and tries to find similarities or differences in the way they are conducted.
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The methodology for bit-level preservation of digital data
Růžička, M. ; Miranda, Andrea ; Hejtmánek, L. ; Vašek, Zdeněk ; Krejčíř, V. ; Bartošek, M.
The aim of the digital data bit-level protection methodology is to provide recommendations for implementing Long Term Preservation (LTP) storage. The methodology provides guidance on how to address the problem of bit protection of digital data in the environment of Czech libraries on the basis of good practice in this area available in the Czech Republic and worldwide. At the same time, this methodology is connected to project ARCLib , which aim is to develop open source LTP system. For wide availability to the libraries of the Czech Republic and elsewhere, the whole recommendation is based on freely available technologies with open source text and licenses allowing further development and adaptation to the needs of the user.
Fulltext: content.csg -  PDF
Plný tet: Metodika bitove ochrany digitalnich dat - PDF
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Research Data Analysis Based on the Collection of Dissertation Theses of Charles University in Prague with Regard to Long-term Digital Preservation
Pavlásková, Eliška ; Krbec, Pavel (advisor) ; Ivánek, Jiří (referee) ; Bartošek, Miroslav (referee)
This dissertation thesis focuses on research data and their use in academics from the point of view of long-term preservation. It maps usage of research data at Charles University in Prague, analyses them and lays the foundation for further research. The first part of the text focuses on the theory of long term preservation and describes the most relevant concepts regarding users, storage and structure of research data. The second part is devoted directly to research data. It consists of definition of research data, the short explanation of their importance and sources, and the model of their lifecycle. The pivotal part of the thesis is the description and the results of the research itself. The research was conducted during the year 2015 and was based on a sample of dissertation theses from the collections of Charles University in Prague. Collected data were analysed by the methods of content analysis and grounded theory. Results are presented in two main parts - content analysis results with regard to differences among science, social science and humanities, and qualitative analysis results. Powered by TCPDF (www.tcpdf.org)
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Li-ion traction battery 28V/40Ah for an electric bike
Bartošek, Martin ; Červinka, Dalibor (referee) ; Vorel, Pavel (advisor)
Thes is deals with the construction, protective circuits and lifetime of lithium ion batteries intented for powering electric bicycles. The entire battery is composed of Li-ion cells with the designation 18650 from Sanyo company, which are connected via series-parallel combination. Because of the series connection of the cells, it is necessary to add protective circuit to each cell to prevent overcharging or deep discharging, on which Li-ion cells are very sensitive. Absence of these circuits could cause irreversible damage to the entire battery pack. Life of Li-ion cells depends on many aspects. These aspects have an influence on the electric bicycle itself. They have an impact on the range and the number of charging and discharging cycles against the considerably high price of the battery.
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