|
|
Carboniferous flora of the Czech part of the Upper Silesian Basin and its stratigraphic importance
Bojdová, Lenka ; Opluštil, Stanislav (advisor) ; Kvaček, Zlatko (referee)
This thesis provides an overview of the Carboniferous flora in the Czech part of the Upper Silesian Basin and its applications in stratigraphy. The sediments of the Upper Silesian Basin with wetland carboniferous vegetation were deposited for about 10 million years. During this period, the floristic character was varying. According to the associations of species we can divide the filling into the stratigraphical units. The basin includes lycopodiophytes, horsetails, ferns, fern-like plants, cordaites, and ginkophytes. The filling began by the Ostrava formation with paralic basin flora with the leading species Sphenopteris adiantoides. Coal seams alternate with non-coal facies with culm flora. Thanks to the paleogeographic changes and marine transgression, the floristic associations changed. Sk. f. h. Enny is the major borderline between middle and upper floristic zones of the lower Namur, in which culm flora disappeared. After the hiatus, Karvinská formation with the important seam Prokop sediments. The formation is characterized by middle Namurian to the Lower Westphalian plants, without non-coal sections. The Upper Namurian plants are located in the sedlové and sušské layers. In the lower sušské layers the biostratigraphical interface of Namur/Westphal is indicated by Lyginopteris hoeninghausii....
|
|
|
Revision of Lepidodendron lycopodioides and L. selaginoides from Czech Carbon...
Rychnovský, Vojtěch ; Opluštil, Stanislav (advisor) ; Kvaček, Zlatko (referee)
The diploma thesis is focused on revision of the type collection of two similar arborescent Carboniferous lycopsids Lepidodendron lycopodioides and Lepidodendron selaginoides. Both species are often misinterpreted in the literature due to their obscure definition by Sternberg. Both species were revised morphometrically, allowing for their redefinition based on morphological characters. The emended diagnosis of both species is provided. Using of existing names of the species was solved in accordance with the International botanical code. Changes in various parametres during ontogenetic development of L. lycopodioides and L. selaginoides were described in detail by using morphometric analysis and both species were redefined. Klíčová slova: Lepidodendron lycopodioides, Lepidodendron selaginoides, pennsylvan, Intra-Sudetic Basin, Radnice Basin, morphometric analysis.
|
|
|
Leptosporangiate ferns from the Carboniferous basins of Bohemia, selected taxa
Frojdová, Jana ; Opluštil, Stanislav (advisor) ; Kvaček, Jiří (referee)
The diploma thesis revises ten selected species of sphenopterid ferns of Carboniferous age deposited in the National Museum in Prague, the West-Bohemian Museum in Pilsen and the British Geological Survey in Keyworth, England. Sphenopterid ferns were studied based on reproductive organs aquired by maceration of coalified plant remains preserved as compressions. Sporangia and their annulus are important diagnostic features for individual genera and species of sphenopterid ferns and for selected species have not been described yet. Following species were studied: Boweria schatzlarensis, Myriotheca anglica, Renaultia crépini, Sturia amoena, Oligocarpia gutbiery, Zeilleria hymenophylloides, Zeilleria avoldensis, Discopteris sp. ("doubravensis"), Scolecopteris elegans a Waldenburgia corynepteroides. With the exception of Waldenburgia corynepteroides, Scolecopteris elegans, Zeilleria hymenophylloides and Zeilleria avoldensis species type material was studied. Maceration of sporangia of Boweria schatzlarensis showed presence of lateral annulus while in case of Myriotheca anglica the annulus is lateral or more likely of a special type, placed on both sides of the sporangia. Annulus type determination of Renaultia crépini also made possible to assign this species within the range of the genus Tenchovia and...
|
|
|
Carboniferous tropical ecosystems of euramerican province
Frojdová, Jana ; Opluštil, Stanislav (advisor) ; Sakala, Jakub (referee)
This thesis deals with the tropical terrestrial ecosystems of Late Carboniferous (Pennsylvanian) time. It is especially focussed on description of the Carboniferous tropical forest and its components. Introductory parts of the thesis deal with the general characteristics of Carboniferous period, including fauna and flora, distributions of continents and how was the climate of this period. Second part follows the characteristics of particular components of the Carboniferous tropical forest, i.e. of individual plant groups and genera, and their ecological demands. Characterised are plants and their assemblages in tropical lowlands as well as in upland areas, rarely preserved in sedimentary record. In the next part I characterise the dynamics of the forest of Carboniferous tropics and discuss potential mechanisms which controlled the floristic changes including plant extinction. The role of climate changes, which had great influence on vegetation, is discussed as the possible main control. In the separate chapter I describe extinction of arborescent lycopsids. Key words: ecosystem, tropical forest, lowland, climate changes
|
|
|
Desing of the carbon cap for the bike's fork
Gallo, Dominik ; Skřivánková, Vendula (referee) ; Košťál, David (advisor)
This bachelor's thesis discusses problems and solutions of design of the carbon crown for the bike's fork. It shows an overview of the possible implementation of the initial design up to final part. The output will be the crown made of carbon composite by mould pressing. For manufacturing the prototype form will be used 3D printing – Fused Deposition Modeling.
|
|
|
Desing of the carbon cap for the bike's fork
Gallo, Dominik ; Skřivánková, Vendula (referee) ; Košťál, David (advisor)
This bachelor's thesis discusses problems and solutions of design of the carbon crown for the bike's fork. It shows an overview of the possible implementation of the initial design up to final part. The output will be the crown made of carbon composite by mould pressing. For manufacturing the prototype form will be used 3D printing – Fused Deposition Modeling.
|
|
|
The Visual Style of Canoe Races in Týn nad Vltavou
Šafářová, Gabriela ; Marešová, Věra (referee) ; Macháček, Mikuláš (advisor)
I focused on design of information and promotional materials of Canoe Marathon World in Tyn nad Vltavou. I concentrated mainly on the failures of the current visual style and proposed new solutions. The key is to design a new logo and its modifications, which will be put to use in a slight variation in the coming years. Art themes based on specific objects, materials and phenomena (lamina structure, paddles, movement) are simplified into almost abstract forms.
|
|
|
Materials for the construction of frames of gravity bicycles
Hrubý, Erik ; Ročňáková, Ivana (referee) ; Juliš, Martin (advisor)
The presented bachelor thesis in it first part is focuses to the application of special racing bikes. The less known gravity disciplines with an explanation of their nature, the type of track and rules are presented. The second part of thesis deals with the structural design and fitting of mountain bikes used in each presented gravity disciplines. In the last part of thesis is a list of structural materials from which are manufactured special bike frames focusing on their mechanical properties, advantages and disadvantages and other usage.
|
|
| |
|
|
New trends and material usage in bicycle frame design
Jelínek, Vladimír ; Němec, Karel (referee) ; Juliš, Martin (advisor)
Thesis in its first part summarizes the evolution of the bicycle from the draisine to the low wheels with a focus on the material of the frame of the bicycle. Also discussed in this section is an overview of small structural modifications, which were gradually used on a bike, like Bowden brake or the first type of transmission system. In the second part, the thesis describes the operating principles and types of suspension forks and disc brakes. Mentioned are materials that are currently used for bike frames with a focus on the advantages and disadvantages of each material used and its future anticipated use.
|
guest ::
