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Study of dielectrical properties of organic material thin films
Pospíšil, Jan ; Boušek, Jaroslav (referee) ; Mikula, Milan (referee) ; Zmeškal, Oldřich (advisor)
The dissertation is focused on the study of electric and especially dielectric properties of thin film organic materials with their huge potential for optoelectronics and other industrial sectors. The theoretical part deals with the use of organic materials in organic photovoltaic cells, the methods of deposition techniques and characterization. The theoretical knowledge of the dielectric spectroscopy, including methods for determining the physical properties and evaluation of experimental data are also described. The experimental part is devoted to the study of small molecule organic solar cells with bulk heterojunction composed of electron donor molecule of DPP(TBFu)2 and electron acceptor fullerene derivatives, such as PC60BM, PC70BM and TC60BM. The experimental part is divided into two main parts. The first part deals with the study of processes occurring at the interface between the active layer and the contact; the second part is focused on transport processes inside the structure of photovoltaic cells and also contains a study of perovskite solar cells.
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Koncepce pohonů osobních automobilů
Pospíšil, Jan
This work is focused on the conception of the drives cars. You will become acquainted with the various concepts pioneered in the field of passenger cars, with the advantages and disadvantages of each approach and the current situation. Further mention of the development of concepts for passenger cars and where it will go in the future. In addition, there will be described and technical solutions specific vehicle. First of all, familiarize yourself with the concepts that are 4, but each is unique. In the historical part I will focus on the pioneers and interestingly designed cars. Development of the concept of drives already a few years point to the use of alternative fuels and hybrid technology.
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Analysis of Bicycle Race Grand Prix of Kuřim
Pospíšil, Jan ; Ing.Lubomír Stříž (referee) ; Drnek, Jiří (advisor)
The Bachelor thesis is aimed of organizing bike races Grand Prix of Kuřim. The first part is devoted to the theoretical background for creation of analysis and explanation of important concepts in mountain biking. The second part is focused on application of analysis. The last section contains suggestions for improvements and increase the attractiveness of the races.
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Multi-Level Association Rules Module of a Data Mining System
Pospíšil, Jan ; Bartík, Vladimír (referee) ; Zendulka, Jaroslav (advisor)
This thesis focuses on the problematics of implementing a multilevel association rules mining module, for existing data mining project. There are two main algorithms explained, Apriori and MLT2L1. The thesis continues with the datamining module implementation, as well as the DMSL elements design. In the final chapters deal with an example dataminig task and its result comparison as well as the whole thesis achievement description.
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Comparation of Models for Datamining
Pospíšil, Jan ; Bartík, Vladimír (referee) ; Lukáš, Roman (advisor)
This thesis focuses on comparing of the datamining models features depending on the different databazis topology. The objekt was to find key features that at most involve the accuracy of classification. Thesis is composed from chapters in a way that even a non-professional or even a complete laik could understand the object and could find theese thesis results useful. In the beginning the reader is beeing made familiar with all the background information about datamining and its models and algorithms, the second part denotes about the model comparison and discusses its results.
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Design of system soil and water conservation measures in Lhotecký stream catchment area
Pospíšil, Jan ; Ručková Sala, Aleksandra (referee) ; Dumbrovský, Miroslav (advisor)
The subject of the Master´s thesis is to design comprehensive flood control measures in the catchment Lhotecký stream in the built up areas of Nová Lhota village, who for several years struggling with the problem of water entering into the urban area during heavy rainfall. On the basis of this Master´s thesis, was created study of resolving the issue of flooding in the village, to a lesser extent, soil erosion and not least improve the ecological stability of the landscape around. For the analysis of the current situation was used digital maps in the GIS and subsequent application of the calculated values to the model DesQ. Through the standard formulas for dimensioning was created for a comprehensive protection of the village. This proposal will in the future serve as a basis for comprehensive land consolidation.
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Study of optoelectrical properties of organic semiconductor thin film layers
Pospíšil, Jan ; Weiter, Martin (referee) ; Zmeškal, Oldřich (advisor)
The thesis is focused on the study of electric and dielectric properties of thin film organic materials that can be used as an active layer of photovoltaic cells. Primarily were studied the properties of the layers on the glass substrates, which consist of a thin active layer of phthalocyanines. On the samples were first measured current-voltage characteristics (in the dark and during the exposure) and the basic parameters of the photovoltaic conversion were determined. Finally were measured frequency dependencies (impedance spectra, in the dark and during the exposure) and the parameters of a model of the structure with organic semiconductor were determined. The obtained results will be used to optimize the properties of photovoltaic cells.
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