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Uranium in historical ceramic glazes: Determination by alpha radiation detection and comparison with other methods
Vopat, Michal ; Goliáš, Viktor (advisor) ; Jelínek, Emil (referee)
In the Czech Republic yellow and ivory glazes with uranium in the Ditmar-Urbach and Terra Teplice companies were manufactured in the pre-war and inter-war period. The production of these glazes took place at the latest since the 1900, the material springs have existed since 1912. Their production ended in 1945. The most suitable method of non-destructive determination of uranium was the measurement of surface alpha activity on planar surfaces by a probe with a ZnS (Ag) scintillator constructed special for this bachelor thesis. Altogether 85 samples, evidence of this production, were measured. To determine the conversion of detected alpha activity to uranium content, an indirect calibration method was chosen to measure uranium content in three types of glazes by WDS analysis. In the studied set, uranium contents ranged from 0.2-2.2 % with the highest frequency ranging from 0.5-0.6 % U. 16 samples of yellow and ivory glazes were without added uranium with contents up to 322 ppm eU. Comparison of uranium contents determined by surface alpha activity measurement with area beta activity confirmed that the glazing does not form a saturated layer for beta radiation. Three types of glazes analyzed by WDS were also measured by XRF. By comparing uranium contents determined by both methods, it was found that...
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Arimaa challenge - comparission study of MCTS versus alpha-beta methods
Jakl, Tomáš ; Majerech, Vladan (advisor) ; Hric, Jan (referee)
In the world of chess programming the most successful algorithm for game tree search is considered AlphaBeta search, however in game of Go it is Monte Carlo Tree Search. The game of Arimaa has similarities with both Go and Chess, but there has been no successful program using Monte Carlo Tree Search so far. The main goal of this thesis is to compare capabilities given by Monte Carlo Tree Search algorithm and AlphaBeta search, both having the same evaluation function, in the game of Arimaa.
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Population structure and dispersal of butterflies in tropical rain forests of Papua New Guinea
VLAŠÁNEK, Petr
The thesis describes the community composition, population structure and dispersal in a lowland rainforest community, extended to changes in butterfly composition along an altitudinal gradient. It tests the feasibility of mark-release-recapture studies in the understories of lowland primary forests, describes dispersal in relation to host plants and compares dispersal and demographic parameters with temperate species. Focusing on primary as well as secondary sites the thesis analyzes species richness and similarity between sites along an altitudinal gradient. It also tests ecological correlates for endemism in New Guinea butterflies, particularly their geographic and altitudinal range, as well as their optimum altitude.
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Hedge Funds as a New Investment Perspective
Kĺučár, Michal ; Brada, Jaroslav (advisor)
Práce se zabývá definováním a popisováním hedgových fondů z pohledu konvenčně a racionálně smýšlejícího portfolio manažera resp. investora, a to zejména nepřímo, tedy porovnáním s rozličným příp. alternativními skupinami aktiv. První část představuje zejména úvod do problematiky hedgových fondů a definice jejich stratégií investování. Další část připravuje ?nástroje? k analytické časti. Jsou to převažně přístupy založené na Moderní teorii portfolia (MPT) a Post-moderní teorii portfolia (PMPT). V samotné analytické časti se pak porovnávají a konfrontují jednotlivé druhy aktiv s hedgovými fondami a jejich konkrétními strategiemi. Při tomto postupu je využito celé spektrum nástrojů definovaných v předchozí části. Dochází tak k překvapivým závěrům a poukázáním na zajímavé skutečnosti a souvislosti v této problematice.
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