|
|
Impact of aerial platform material on antenna gain
Tobolka, Lukáš ; Zeman, Kryštof (referee) ; Pokorný, Jiří (advisor)
The goal of this thesis is to recreate some of the most used multicopter configurations within CAD software with varying materials. These models are then imported into ANSYS HFSS to examine the influence of shape and material on the performance of an antenna. Results from these tests could help in the creation of a high-speed (Gb/s) backhaul network in the future. The theory section is about multicopters, their configurations and materials used in their manufacture. Subsequently, it delves into the fundamental theory behind antennas and the description of CAD software (Autodesk Inventor 2016) and antenna simulation software (ANSYS HFSS). The practical section includes: description of the measurement process for the MikroTik wAP 60G AP antenna, the parameters of which were used during the simulation; a model of the antenna (horn) and last but not least the results of the measurements, which are the thesis’ main benefit.
|
|
|
Impact of aerial platform material on antenna gain
Tobolka, Lukáš ; Zeman, Kryštof (referee) ; Pokorný, Jiří (advisor)
The goal of this thesis is to recreate some of the most used multicopter configurations within CAD software with varying materials. These models are then imported into ANSYS HFSS to examine the influence of shape and material on the performance of an antenna. Results from these tests could help in the creation of a high-speed (Gb/s) backhaul network in the future. The theory section is about multicopters, their configurations and materials used in their manufacture. Subsequently, it delves into the fundamental theory behind antennas and the description of CAD software (Autodesk Inventor 2016) and antenna simulation software (ANSYS HFSS). The practical section includes: description of the measurement process for the MikroTik wAP 60G AP antenna, the parameters of which were used during the simulation; a model of the antenna (horn) and last but not least the results of the measurements, which are the thesis’ main benefit.
|
|
|
Design of clamping fixture for ultrasonic welding of plastics
Vojteková, Lucia ; Kandus, Bohumil (referee) ; Kubíček, Jaroslav (advisor)
The project elaborated design of clamping fixture for ultrasonic welding – horn. In pursuance of literary studies and calculations there was created approximate shape of clamping fixture, which was created in 3D programme and tested by finite element analysis. Using the linear static analysis there were found some modal shapes of the horn. The purpose of simulations is to find modal shapes of analysed structure, which can cause damage of the horn or equipment. Analysis shows the real shape of vibrations of the tool, which can be always in one axis. With the help of correction of dimensions and shape there was found required frequency in working range of ultrasonic equipment. Suitable shape of the horn was processed into drawings. The material, from which is horn made of, is a titanium alloy TiAlMo74.
|
|
|
Overview of the trade in specimens of rhinoceros
JEŽKOVÁ, Věra
The subject of this thesis was focused on the analysis of international trade with selected specimens of rhino species (trophies, horns, live rhinos, carvings, horn carvings, derivatives) in 2004 - 2013. The trade at the European Union, taking into accounts the position of the Czech Republic, and the global worldwide trade were evaluated in term of importer and exporter and source, purpose and origin of specimens. Evaluation was based on data from the Cites Trade Database which was further processed via contingency tables and graphs. It was found that there was a decrease of import and export in 2013. The most imported specimens were live rhinos in the world (40,5%) and trophies in the European Union, the most exported specimens were trophies in the world (39,4%) and carvings (80,7%) in the European Union. The largest importer was USA in the world (16,6%) and Spain in the European Union (3%). The largest exporter in the world was South Africa (73,9%) and United Kingdom in the European Union (4,6%). The Czech Republic was imported 0,8% of total import and exported 0,2% of total export. Imported specimens came mostly from the wild (62,1%), the country of origin was not completed and were imported mainly as hunting trophies (33,4%). Exported specimens came mostly from the wild (76,3%), the country of origin was not completed (82,2%) and were exported primarily as hunting trophies The results indicate an overall downward trend in the legal trade but also confirm the considerable interest in horns in Asia. Therefore, it is necessary to continue to monitor all transactions.
|
|
|
The human ages in symbolic decoration of facades of renaissance townhouses on the Czech-Austrian border
CHALUPA, Pavel
The aim of the bachelor thesis is the catalog of the human ages in decoration of Renaisssance facades of townhouses on the Czech-Austrian border, content and comparative interpretation of selected theme. The first chapter discusses the state of research in historical and art-historical science. Next it discusses the historiography, the concept a sgraffito and the shape of Renaissance townhouses. The second chapter deals with the actual motive of human ages, symbolism and theatrical adaptation. The third chapter describes the various fronts on the Czech-Austrian border. The last chapter compares the different decorations and solve religious question of the owner. The conclusion summarizes the findings and presents opportunities for further research.
|
|
|
Sculptor Josef Dietrich from České Budějovice
VODIČKA, Matěj
The aim of this work is to discuss the life and selected works of somewhat neglected baroque sculptor Josef Dietrich from České Budějovice. Because of his work in the streets of České Budějovice occupies privileged position in number, he could be considered as the most important and most prolific artist who ever lived in this city and his contribution to the South Bohemian baroque art, in my opinion, has not been adequately appreciated. All aspects of artistic and personal life of Josef Dietrich could not be covered in this bachelor thesis, so the aim of this task is to analyze selected works of Dietrich and take them into his account patterns, to identify previously unknown circumstances of his creation, to highlight his importance to České Budějovice region and integrate the production of his workshop into the development of baroque sculpture in the country. The principal sources in the preparation of this work I have been using were archivals and literature about the history and development of České Budějovice city where Josef Dietrich lived most of his life.
|
|
| |
guest ::
