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Documentation of sinkholes in Vilemovice locality
Kroupa, Ondřej ; Kuruc, Michal (referee) ; Vondrák, Jiří (advisor)
The main object of this bachelor thesis is area survey of locality close to Vilémovice. It was planimetric survey of field and specific locality of Vilémovice along with planimetric and altimetric survey of sinkholes. According to those surveys was made a thematical mapin scale 1:1000.For sinkholes was made detail in scale 1:500.
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GRAIL and LOLA Satellite Data Resolve the Long-Lasting Convergence/Divergence Problem for the Analytical Downward Continuation of the External Spherical Harmonic Expansions
Šprlák, Michal ; Han, Shin-Chan ; Pitoňák, Martin ; Novák, Pavel
Spherical harmonic expansions are routinely used to represent the gravitational potential and its higherorder spatial derivatives in global geodetic, geophysical, and planetary science applications. The convergence domain of external spherical harmonic expansions is the space outside the minimum Brillouin sphere (the smallest sphere containing all masses of the planetary body). Nevertheless, these expansions are commonly employed inside this bounding surface without any corrections. Justification of this procedure has been debated for several decades, but conclusions among scholars are indefinite and even contradictory. In this contribution, we examine the use of external spherical harmonic expansions for the gravitational field modelling inside the minimum Brillouin sphere. We employ the most recent lunar topographic LOLA (Lunar Orbiter Laser Altimeter) products and the measurements of the lunar gravitational field by the GRAIL (Gravity Recovery and Interior Laboratory) satellite mission. We analyse selected 39 http://dx.doi.org/10.13164/seminargnss.2023.38 quantities calculated from the most recent GRAIL-derived gravitational field models and forwardmodelled (topography-inferred) quantities synthesised by internal/external spherical harmonic expansions. The comparison is performed in the spectral domain (in terms of degree variances depending on the spherical harmonic degree) and in the spatial domain (in terms of spatial maps). To our knowledge, GRAIL is the first gravitational sensor ever, which helped to resolve the long-lasting convergence/divergence problem for the analytical downward continuation of the external spherical harmonic expansions, see [1].
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Survey and preparation of a purpose map of the park Pod Plachtami, Brno Kamenný Vrch, part B
Flídr, Tomáš ; Machotka, Radovan (referee) ; Vondrák, Jiří (advisor)
The theme of this bachelor thesis is creating thematic map of the park Pod plachtami which is located in the city district Brno-Nový Lískovec. The written part describes the entire procedure from terrain reconnaissance, used devices, creating a survey net, detailed survey, to office work and graphic processing. The result of this work is thematical map in 1:500 scale, which is connected to geodetic reference systems S-JTSK and BPV. The map is made in the 3rd accuracy class according to ČSN 01 3410.
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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...
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Optimization of EDM process control parameters
Prokeš, Tomáš ; Beneš, Libor (referee) ; Bednář, Josef (referee) ; Matoušek, Radomil (advisor)
The dissertation thesis is focused on the optimization of control parameters of an EDM machine; the subject of optimization is cutting speed and surface topography. The first part of the thesis contains a research study on the technology of electrical discharge machining with the attention paid to the optimization methods use for control parameters of this process. The second part of the thesis is focused on real application of knowledge gained from studied sources. Here, a design of experiment aim at optimizing the parameters of the EDM machine is designed and carried on to maximize the cutting speed with the highest possible surface quallity. The result of the work is to build adequate regression models and find the optimal setting of machine control parameters.
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Picture of the Holy Land in Adomnán's De locis sanctis
Falátková, Michaela ; Kubín, Petr (advisor) ; Nechutová, Jana (referee) ; Bláhová, Marie (referee)
The presented thesis deals with the work On the Holy Places (De locis sanctis) compiled by the monk and abbot Adomnán of Iona (624-704). Adomnán's work provides evidence of the unknown Gallic pilgrim Arculf about his journey to the Holy Land. Furthermore, Adomnán's text represents a complex historical source about the character of the early medieval pilgrimage during the second half of the 7th Century. Moreover, On the Holy Places offers extensive description and topography of the holy places associated with Jesus Christ's life, passion, and resurrection, hence oscillates between itinerary and hagiography. From the perspective of literary history, Adomnán's narrative has a deep-rooted background within the tradition, nevertheless, provides a significant number of innovations beyond the traditional views. The thesis contextualised Adomnán's text within the 7th-Century Iro-Scottish literary production, i.e. introduces Adomnán's new concept of pilgrimage narrative. Moreover, the text presents the first translation of On the Holy Places from Latin into Czech along with extensive commentary. The historical-critical method of Classic and Medieval studies, together with synchronous and diachronic analysis, was used. The detailed commentary contextualised Adomnán's work within the archaeological excavations...
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Characteristics Of Gallium Arsenide Solar Cellsat High Temperature
Papež, Nikola
This article reviews a work on processing of gallium arsenide (GaAs) solar cells. The performance of the cells before and after 300 _x000E_C thermal processing was correlated with topography identified by optical camera, atomic force microscope (AFM) and scanning electron microscope (SEM). Experiment indicates insignificant changes in topography of GaAs solar cells, but electrical characteristics show an excellent resistance of the samples to processing temperature.
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