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Summary of foreign knowledge about the origin and development of EDZ in crystalline rocks - research
Vavro, Martin ; Souček, Kamil ; Staš, Lubomír ; Vavro, Leona
Presented search summarizes findings of foreign research oriented on the origin and evolution of the excavation damaged zone in crystalline rocks with a particular focus on the essential results of experimental projects which were performed in Canada, Sweden, Finland, and Switzerland. The study is divided, excluding the introduction, into seven main chapters of the text, which gradually deal with: (1) definition of key terms, (2) overview of the main underground research laboratories in the world where EDZ assessment was conducted, (3) methods suitable for EDZ description and characterization, (4) main factors influencing the origin of failure around the excavations and time-dependent evolution of EDZ. An overview of important outcomes of EDZ experiments, focusing on the European hard rock laboratories (Stripa, Äspö, Onkalo/Olkiluoto and Grimsel), and their summary are presented in the final two chapters.\nThe review summarizing the published key findings and results of in situ experiments shows, that for rock in lower stress state, i.e. in no spalling environment, the extent and character of rock mass damage is typically dependent on the excavation method. Using mechanical excavation, rock damage zone with thickness less than 3 centimeters can be originated. The microcracks within this zone contribute to the increase of hydraulic conductivity of the rock mass. At some test sites (Äspö, Grimsel), where the tunnel boring machine technology was used, the damage zone was already detected in depth of less than 5 mm.\nOn the contrary, openings excavated by drilling and blasting are characterized by much more extensive damage zones up to several tens of centimeters in width. The damage progressively diminishes with the distance from the opening.
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Historical development of stands in the first zone of the National Park Šumava close to the village Prášily
Strnad, Jiří ; Šálek, Lubomír (advisor) ; Zahradník, Daniel (referee)
The dissertation, The History of Evolution of the Forests of the Category I Protected Area in the National Park Šumava- environs of the municipality of Prášily, firstly focuses on the research and analysis of extant historical documents and other archival materials. In particular it analyses the historical maps of the former Velkostatek Prášily-Dlouhá Ves of the Schwarzenbergs family that show the evolution of the forests and their management between 1860 and 1930.
Secondly, the dissertation focuses on the assessment of the current state of the forests and the way in which they are managed by the Správa NP Šumava and in particular on the positioning of the category I protected areas in order to protect the remnants of the native woodland.
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ecovery processes in dispersion and precipitation hardened Al alloys
Uhlíř, Jaromír
In this thesis the analysis of second phase particles influence on recovery and recrystallization processes in twin-roll cast sheets of AA 8011 aluminium alloy based on Al-Fe-Si is studied. The role of arrangement of impurity atoms and the type of thermomechanical treatment is investigated. Unbalanced crystallization of solid solution, which occurs during twin-roll casting, results in the creation of complicated structure of second phases, which isn't as a rule homogenously distributed in the volume. Therefore these materials exhibit poor mechanical properties in comparison with conventionally cast alloys. Important question the materials science deals with in the last years, is to find such a thermomechanical treatment, which results in balanced phase composition and optimal mechanical properties, comparable with properties of products produced by conventional methods. Such properties are especially high formability combined with sufficient strengths. To study physical properties of the alloy the resistometric measurement during linear heating, thermo-electric measurement and hardness measurement were used. Evolution of structure and microstructure in the alloy during heat treatment was studied by means of optical microscopy and transmission and scanning electron microscopy.
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Evolution of topaz-bearing granites in the Krásno and Vysoký Kámen area (Slavkovský les Mts.)
René, Miloš ; Kempe, U. ; Wolf, D.
In the area between Krásno and Vysoký Kámen, southwestern of Karlovy Vary some stocks of topaz-albite granites are evolved, which are part of the Krudum granite massif. The Krudum massif has a markedly zoned internal structure with the oldest porphyritic biotite granites in its central part and younger two-mica granites and topaz-albite granites on its periphery. Topaz-bearing granites are evolved by means of progressive fractional crystallization from peraluminous granite melt.
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GNSS deformation measurement in the Sněžník Network
Sobek, Josef ; Weigel, Josef (referee) ; Švábenský, Otakar (advisor)
This thesis deals with a processing and evaluation of GNSS data measured during the years 2001 - 2012 in geodynamical network Sněžník. The aim of the thesis is a detection of possible horizontal and vertical displacements of points in this network. The thesis also deals with comparison of results determined by only GPS and both GPS and GLONASS measurements. Graphic interpretation of displacements’ evolution during the whole monitored period is one of the results of this thesis.
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Microsatellite region in the murine oncogene src - its primary structure and variability during evolution
Fučík, Vladimír ; Šindelka, Radek ; Beran, Jaroslav ; Ferjentsik, Zoltán ; Jonák, Jiří
In the fifth intron of the Mus musculus oncogene src a complex microsatellite was discovered that consists of a CA run and 31 bp apart followed by track of TG dinucleotides interrupted by extra Gs in specific intervals. As the 31 bp interlink can assume a hairpin structure, the whole region can be viewed as an imperfect inverted repeat. The microsatellite was sequenced in imbred lines of M. m. musculus and M. m. domesticus, as well as in mice of both subspecies trapped near the hybrid zone. Differences in the length of repeat regions, insertion/deletions and simple base changes characterize the strains. Hybrids between the two species could be identified by sequencing of cloned PCR products. The structure of the microsatellite in more distant species was found to be conspicuously different. Instead of frequent (CA)18-25, we can see only (CA)8 in M. spretus, CATGCGCCCCCCA in Mus pahari and CACCCCCC in Mus caroli. No similar structure is present in the corresponding human src intron.
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