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Preparation and characterization of perovskite solar cells
Juřík, Karel ; Salyk, Ota (referee) ; Pospíšil, Jan (advisor)
This work deals with the perovskite photovoltaic cells. The first part summarises the basic information about this technology and shows the most important milestones in its development. Following part includes the parameters required to characterise the electric properties of a photovoltaic cell and the assessment of its quality. The experimental part of this thesis aims to describe the influence of the annealing time of the perovskite active layer on the final efficiency of created solar cells. The best results were determined to be achieved with the annealing time of 90 minutes.
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ECG quality estimation
Pospíšil, Jan ; Smíšek, Radovan (referee) ; Smital, Lukáš (advisor)
This bachelor thesis deals with the question of estimation of the quality of the ECG signals, which is a key parameter for determining the diagnosis. The theoretical part deals with the basic knowledge concerning cardiac physiology, electrocardiography and finally the types of interferences that can occur during the measurement. The following practical part will deal with the published methods and the proposal of methods for estimating signal quality and their testing on artificial and real data.
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Architecture of home
Očadlíková, Veronika ; Pospíšil, Jan (referee) ; Mléčka, Jan (advisor)
The thesis is based on monitoring how one represents, creating an environment, how one completes it, or how the human environment is created. When we ask ourselves what our home means for us, we knew we could give it the shape of space. We could describe it as a place where we like to be. Some questions arise. If there is any idea of living at home, if it is as personal, how does each of us perceive home in his intimacy as well? How did it become the architecture itself? The goal of the work is to translate the understanding of the home through a specific situation. I choose a village in Slovakia, Čechynce, which has more than 1000 inhabitants. The architectural design itself does not adapt to the creation of a home as a house. He wants to point out that the home is not in an isolated system of walls, but in an ability of distence and in a chance to return again.
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Practicum in training teachers of EFL
Pospíšil, Jan ; Gráf, Tomáš (advisor) ; Čermák, Jan (referee)
This thesis focuses on the topic of teaching practicum in training teachers of EFL. The practicum is regarded as a complex didactic tool realized for a specific purpose with a specific aim. The theoretical part of the thesis presents the concept of practicum and the role of its participants. Furthermore, it presents the practicum models used in Finland, Germany and Belgium. Based on secondary literature and on the description of the practicum models used in the selected countries, the theoretical part proposes recommendations for enhancing the efficiency of practical training within the lifelong learning programme. The aim of the empirical part of this thesis is to find out how novice teachers evaluate their practical training and the beginning of their teaching career. The research is based on five case studies of teachers educated at the Faculty of Arts at Charles University and one case study of a teacher educated at the Faculty of Education at the University of South Bohemia. Semi- structured interviews were conducted to find out whether the novice teachers felt sufficiently prepared for their career and whether they consider the practicum model efficient. The research findings suggest that the practicum model used within the lifelong learning programme is inadequate and does not sufficiently...
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English counterparts of Czech finite subjectless clauses
Pospíšil, Jan ; Malá, Markéta (advisor) ; Šaldová, Pavlína (referee)
The thesis focuses on the English counterparts of a Czech clause type which does not exist in English - finite subjectless clauses. These Czech clauses with a verbal or verbo-nominal predicate correspond to English clauses with a subject and a predicate. The thesis describes the repertoire of means used as subjects of the English constructions, also examining the factors which influence the choice of a particular subject and predicate, and the structure of the English sentence. The most influential factors are linked with the semantic class of the clause, i.e. whether it refers to the states of the surrounding environment or physical and psychical states, whether a general human agent is implied, or whether the meaning of the clause is associated with modality. The material is extracted from the Czech-English parallel corpus InterCorp. One hundred examples of Czech finite subjectless clauses were obtained from Czech original texts (the "core" texts). The clauses extracted comprise predicates which include the third person singular of an active past participle, i.e. Setmělo se. Došlo k nedorozumění.
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Wireless sensor based on LoRa technology
Pospíšil, Jan ; Krajsa, Ondřej (referee) ; Troják, David (advisor)
The bachelor thesis in theoretical part is focused on wireless technologies used for home control and automation devices where low power consumption is required. There are mentioned possibilities of each technology, energy requirements, range and throughput. The result of practical part is design and construction of a wireless temperature sensor which uses LoRa technology to communicate with a gateway and is also capable to last on battery for years. Additional feature is user possibility to use GPIO pins in form of relays. The task also covers design and construction of a gateway which listens for LoRa packets and communicates with PHP application on server side. Last step of practical part is focused on design of PHP application, which is responsible for visualization of received data.
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The study of the electrical and dielectric properties of gas sensors based on ionic liquids
Maráčková, Lucie ; Pospíšil, Jan (referee) ; Zmeškal, Oldřich (advisor)
This diploma´s thesis is focused on a study of electrical and dielectric properties of gas sensors based on ionic liquids. Measurements were done on two different types of OECT substrates (0099 and 0160). Three ionic liquids and physiological solution PBS were chosen as electrolytes. Direct current current-voltage characteristic was measured. Switching rations of transistors with this electrolyte were determined by current-voltage characteristic. Alternating resistivity dependence on frequency were measured as well. Better properties showed OECT 0099 substrates.
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Formation of runoff from snow cover in the Otava River headstream area
Pospíšil, Jan ; Jeníček, Michal (referee) ; Kocum, Jan (advisor)
Diploma thesis solves the snow hydrology issue applied to model catchments of Rokytka and Ptačí Brook situated in central part of Šumava mountains, concretely in the upper Otava River basin representing the source area of extreme runoff episodes formation. Results of snow cover field surveyfrom 2007/2008 and 2008/2009 winter periods are presented. Their main goal was to describe the spatial variability of snow cover characteristics and its spatial distribution by means of GIS software and to enable an estimation precising of water reserves retained in snow. Outcomes are confronted with the snow melting analysis, with hourly and daily air temperatures and with detailed analysis of snow cover vertical profile that is important for consecutive runoff modelling during spring period using Degree-Day method. Powered by TCPDF (www.tcpdf.org)
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