|
|
Forward and Inverse Modeling of Planetary Gravity and Topography
Pauer, Martin ; Čadek, Ondřej (advisor) ; Martinec, Zdeněk (referee) ; Novák, Pavel (referee)
Title: Forward and Inverse Modeling of Planetary Gravity and Topography Author: Martin Pauer Department/Institute: Department of Geophysics MFF UK Supervisor of the doctoral thesis: Doc. RNDr. Ondřej Čadek, CSc., Department of Geophysics MFF UK Abstract: The aim of this work was to investigate various mechanisms compensating the observed planetary topography - crustal isostasy, elastic support and dynamic support caused by mantle flow. The investigated models were applied to three different planetary problems. Firstly we applied dynamic compensation model to explain today large-scale gravity and topography fields of Venus and investigate its mantle viscosity structure. The results seem to support not only models with constant viscosity structure but also a model with a stiff lithosphere and a gradual increase of viscosity toward a core. In the second paper several crust compensation models were employed to estimate the density of the Martian southern highlands crust. Since the used methods depends differently on crustal density changes, we were able to provide some constraints on the maximum density of the studied region. In the third application, the strength of a possible ocean floor gravity signal of Jupiter's moon Europa was studied. It turned out that if the long wavelength topography reaches height at...
|
|
|
Evaluation of machine elements surface topography by optical profilometer
Vrána, Jakub ; Křupka, Ivan (referee) ; Šperka, Petr (advisor)
This thesis deals with the issue of surface texture topography of engineering parts. Research provides general view of surface texture topography evaluation and puts the aforementioned into the context of international standards. In the practical part of this thesis, an experiment is implemented. With help of optical interferometer, parameters are measured and their robustness is evaluated. In the conclusion part of this thesis, acquired information are evaluated and resumed.
|
|
|
Certifikovaná metodika: Ochrana místních a pomístních jmen a urbanonym jako zdroje lokální, regionální a národní identity a kulturního dědictví
David, Jaroslav ; Mácha, Přemysl
This methodology presents the principal reasons, guidelines, and procedures for the protection of place names as cultural heritage. The methodology first summarizes the general principles of place names conservation and subsequently describes the individual methods of their protection in cities and villages in view of the specific charater of place names and factors which endanger them in different types of settlements. The methodology can be particularly useful for representatives and employees of public and state institutions and local government, or museums, archives and schools, who can significantly contribute to the conservation of the cultural heritage value of place names.
Fulltext:  PDF
|
|
|
Comparison of selected vegetation indices and determination of suitability for yield description on agricultural field
Křížová, Kateřina ; Kumhálová, Jitka (advisor) ; Novák, Petr (referee)
Calculation of vegetation indices (VI) is an effective method how to evaluate a condition of a monitored vegetation. It is a non-destructive and low-cost approach and its results are crucial for planning agronomic management within a monitored field.
Diploma thesis deals with the determination of suitability of selected VI to describe the yield variability related to topographic attributes and weather conditions. The study area was a 11.5 ha field. To derive selected VI LANDSAT 5 images with a spatial resolution of 30 m were used. These images were taken in years 2005 and 2011 for winter wheat and in years 2006 and 2010, when oat was grown. SW ENVI and ArcGIS were used to obtain specific values. Those were used for statistical analysis. The results indicated a strong relationship between all selected VI and yield, respectively topographic factor. Selected VI derived from LANDSAT 5 images can be used to describe yield variability over a monitored field.
|
|
|
Charakterizace tenkovrstvých elektroluminiscenčních součástek
Ahmed, Mustafa M. Abdalla ; Hrabovský, Miroslav (referee) ; Tománek, Pavel (advisor)
Jádrem této disertační práce bylo studovat optické a elektrické charakteristiky tenkovrstvých elektroluminiscenčních součástek řízených střídavým proudem (ACTFEL) a zejména vliv procesu stárnutí luminiforů na jejich optické a elektrické vlastnosti. Cílem této studie měl být příspěvek ke zvýšení celkové účinnosti luminoforů, vyjádřené pomocí jasu, účinnosti a stability. Vzhledem k tomu, že současnou dominantní technologií plochých obrazovek je LCD, musí se další alternativní technologie plošných displejů porovnávat s LCD. Výhodou ACTFEL displejů proti LCD je lepší rozlišení, větší teplotní rozsah činnosti, větší čtecí úhel, či možnost čtení při mnohem vyšší intenzitě pozadí. Na druhou stranu je jejich nevýhodou vyšší energetická náročnost, problém s odpovídající barevností tří základních barev a podstatně vyšší napětí nutné pro činnost displeje. K dosažení tohoto cíle jsme provedli optická, elektrická a optoelektrická měření ACTFEL struktur a ZnS:Mn luminoforů. Navíc jsme studovali vliv dotování vrstvy pomocí KCl na chování mikrostruktury a na elektroluminiscenční vlastnosti (zejména na jas a světelnou účinnost) ZnS:Mn luminoforů. Provedli jsme i některá, ne zcela obvyklá, měření ACTFEL součástek. Vypočítali jsme i rozptylový poměr nabitých barevných center a simulovali transportní charakteristiky v ACTFEL součástkách. Studovali jsme vliv stárnutí dvou typů ZnS:Mn luminoforů (s vrstvou napařenou či získanou pomocí epitaxe atomových vrstev) monitorováním závislostí svítivost-napětí (L-V), velikost vnitřního náboje - elektrické pole luminoforu (Q-Fp) a kapacitance-napětí (C-V) ve zvolených časových intervalech v průběhu stárnutí. Provedli jsme krátkodobá i dlouhodobá měření a pokusili jsme se i o vizualizaci struktury luminoforu se subvlnovým rozlišením pomocí optického rastrovacího mikroskopu pracujícího v blízkém poli (SNOM). Na praktickém případu zeleného Zn2GeO4:Mn (2% Mn) ACTFEL displeje, pracujícího při 50 Hz, jsme také studovali stabilitu svítivosti pomocí měření závislosti svítivosti na napětí (L-V) a světelné účinnosti na napětí (eta-V). Přitom byl zhodnocen význam těchto charakteristik. Nezanedbatelnou a neoddělitelnou součástí této práce je i její pedagogický aspekt. Předložený text by mohl být využit i jako učebnice pro studenty na mé univerzitě v Lybii.
|
|
|
Local characterization of electronic devices
Müller, Pavel ; Škarvada, Pavel (referee) ; Tománek, Pavel (advisor)
The development of micro and nanoelectronics and nanophotonics needs novel characterization techniques to ensure higher quality of designed devices. The thesis describes a use of Scanning Near-field Optical Microscopy (SNOM) in dimensional control and in local investigation of diverse physical parameters. As example of its potential, the correlation between object topography and reflection measurement of capacitors is shown.
|
|
|
HOUSE ON THE FOOTHILL - TOWN HOUSE IN THE HISTORICAL CENTRE
Dvořáková, Eva ; Rudiš, Viktor (referee) ; Oplatek, Jiří (advisor)
The main objective of the master´s thesis was a design of the town house in the complicated topografical situation of the foothill of Pekařská street. The topography of the building site is influenced by its surroundings. The street Pekařská is lowering from east to west, but the road Anenská is rising from east to west. The biggest difference between the the lowest and the highest point of the site is 7,5 m. This situation enables to design three entrances to three different floors of the building. An outstanding point of the design of the house is a composition axis which is running up Pekařská street. The town house is facing this axis thus the main entrance of the house is accented. There was a compact house designed, which takes advantage of its very good position – there is a two-floor solution with a shopping mall. The hall in its middle is opening over two floors and it is lightened through a roof lightwell. On this platform is situated an „L“ shaped part of the building, which creates a protection against very noisy Pekařská street. The house is opening its form to the south, to a sunny roof garden. This garden is opened only for inhabitants of the house. The garden improves the quality of the living in the house and substitutes a green area, which used to be in this place. The shape of the building is lowering down from Pekařská street to Anenská road. There are some terraces designed this way to improve the living in the roof apartments and provide a beatiful view to the west.
|
|
|
Development of Military Mapping of Our Country
NOVÁKOVÁ, Nikola
The presented thesis is entitled "Development of Military Mapping of Our Country." Each chapter captures the most significant and best known stages in the development of topographic mapping: mapping by Jan Kryštof Müller; the first, second and third military mapping; 1923-1945 mapping; the military mapping after the Second World War; and finally the military mapping after the Czech Republic joined NATO. The aim of the thesis is to characterize and elaborate through a detail retrieval the course of military topographic mapping in Bohemia and Moravia from Müller's first mapping till present. The conclusion summarizes the obtained key information reflecting the findings about the historical milestones in the field of mapping and map creation in our country.
|
|
| |
|
| |
guest ::
