|
| |
|
|
Určování parametrů temné energie a modifikované gravitace v rámci projektu LSST
Vraštil, Michal ; Prouza, Michal (advisor) ; Heyrovský, David (referee)
Temnáenergietvořícípřibližně70%hmotyvesmíruz·stávájednouznejvětšch záhad moderní fyziky. K pochopení její podstaty jsou potřeba přesná kosmolog- ická měření. Jedním z projekt· zkoumající tuto exotickou formu hmoty bude i Large Synoptic Survey Telescope, který pom·že potvrdit či vyvrátit standardní kosmologický model (ΛCDM). Pro úspěch projektu je potřeba prozkoumat r·zné teorie temné energie. Jednou z alternativních teoríí vysvětlujících urychlenou expanzi vesmíru je tzv. chameleoní gravitace. Chameleon je nové skalární pole s hmotou závisející na okolní hustotě. V hustých prostředích jako je například Sluneční soustava získává pole velkou hmotu a propaguje se pouze na malých vzdálenostech díky čemuž m·že uniknout standardním test·m gravitace. V prá- ci mimo jiné studujeme chování chameleoního pole v okolí hvězd a v galaxiích. Ukazujeme také za jakých okolností je toto pole možné detekovat pomocí spek- troskopických měření a slabého čočkování.
|
|
|
Navajo Ritual Healing
Galovič, Roman ; Chlup, Radek (advisor) ; Kozák, Jan (referee)
In this paper I deal with two traditions of ritual healing in Navajoland, namely with the traditional Navajo ritual healing and the peyote healing of Native American Church. I introduce them in three dimensions when I consecutively describe a cosmological framework, a social organization and a specific example of a ritual. At the core of my analysis is the grid & group method that was developed by Mary Douglas, when I look for the correlations between cosmological notions and social structures, and the ways they are established by the ritual. This way I point out how the colonial oppression weakened community ties and created ground for the growth of Native American Church in Navajoland, because NAC is able to offer existential answers for life in such a desolate space. However this does not mean that the Traditional Navajo healing was wiped out by colonialism, and both traditions continue to exist side by side and are quite often combined by particular patients. I offer a way to interpret this medical plurality when I fuse Mary Douglas' method with certain traditional Navajo notions and psychological analyses by Friedrich Nietzsche. In this view, every person would be permanently situated in socially and phenomenologically heterogenic space, and particular healing traditions would heal different social...
|
|
|
Symbolism and visual rhetoric of the Borobudur temple in the context of modern era
Pyšová, Michaela ; Petrů, Tomáš (advisor) ; Pokorný, Ondřej (referee)
Michaela Pyšová 2016 SYMBOLISM AND VISUAL RHETORIC OF THE JAVANESE BUDDHIST TEMPLE BOROBUDUR bachelor thesis Abstract The bachelor thesis deals with the Javanese Buddhist monument Borobudur, which is due to its unique architectural form and the symbolic value of the tangible important part of Indonesian and World Heritage Site. The building is a symbol of Buddhist cosmology and is used by the monks in its original ritual context even today. Javanese mentality evolved according to the transformation of religious and philosophical doctrines and changes over the centuries, similarly understanding the message of the monument by islamized contemporary society. Introduction of thesis defines cultural-historical context of Borobudur during the period ranging from the beginnings of Buddhism in India through dissemination of buddhist teachings in the Indonesian archipelago and its mingling with the local faith. The next part of thesis refers to the architecture of the monument, reliefs and message of the importance of overlapping structures into modern times. The goal of the analysis is primarily analysis of Javanese temple architecture as an ideological system that expresses the philosophical values of Buddhist culture spilling over into modern times.
|
|
|
Statistical Analysis of the Observable Data of Gamma-Ray Bursts
Řípa, Jakub ; Mészáros, Attila (advisor) ; Münz, Filip (referee) ; Ramirez-Ruiz, Enrico Jorge (referee)
Gamma-ray bursts are still not fully understood events. However, their exploration could pro- vide a useful tool for a better understanding of the early Universe because they belong to the most distant and violent objects that astronomers know. This thesis tries to bring more information about a so-called group of intermediate-duration bursts claimed by different authors employing dif- ferent data samples. Firstly, duration and spectral hardness properties of bursts from the Reuven Ramaty High-Energy Solar Spectroscopic Imager are statistically analysed. The obtained results bring a suspicion that these intermediate bursts gather into a separate group. Secondly, these bursts are investigated in more detail with respect to their spectral lags, peak count rates, red- shifts, supernova observations, and so forth. Thirdly, long-duration bursts with known redshifts and with derived pseudo-redshifts detected by The Burst and Transient Source Experiment, Swift and Fermi bursts with known redshifts, are used to study the cosmological effects on the observed flux and fluence distributions.
|
|
|
Early Buddhist Cosmology of the Pali canon
Horáček, Petr ; Holba, Jiří (advisor) ; Melnikova, Nora (referee)
This paper is focused on the early Buddhist cosmology. It briefly presents the general concepts of cosmology in Buddhism and the Pali Canon in order to better emphasize the characteristics of the primary text on which the work is based, namely the Agaññasutta of the Pali canon. The author takes into account other suttas of the Pali canon and secondary literature as well. The Agaññasutta represents one of the first cosmological texts of Buddhism and can therefore be considered as a very valuable source of information about the early cosmological ideas and the context in which these ideas were formed. It deals with the destruction of the world, its re-emergence, the emergence of creatures, human beings and social strata, the election of the first king and the establishment of the ascetic social groups. To gain a better orientation in the source material, the plot can be divided into the period until the development of human beings, the creation of social institutions with the election of the king and the emergence of alternative social institutions headed by a Buddhist monk. The main aim of the present paper is to show that the Agaññasutta contains the structure based on the necessity of the emergence of the human beings in their physical form and endowed with their moral faults, the society which...
|
|
|
Statistical Analysis of the Observable Data of Gamma-Ray Bursts
Řípa, Jakub ; Mészáros, Attila (advisor)
Gamma-ray bursts are still not fully understood events. However, their exploration could pro- vide a useful tool for a better understanding of the early Universe because they belong to the most distant and violent objects that astronomers know. This thesis tries to bring more information about a so-called group of intermediate-duration bursts claimed by different authors employing dif- ferent data samples. Firstly, duration and spectral hardness properties of bursts from the Reuven Ramaty High-Energy Solar Spectroscopic Imager are statistically analysed. The obtained results bring a suspicion that these intermediate bursts gather into a separate group. Secondly, these bursts are investigated in more detail with respect to their spectral lags, peak count rates, red- shifts, supernova observations, and so forth. Thirdly, long-duration bursts with known redshifts and with derived pseudo-redshifts detected by The Burst and Transient Source Experiment, Swift and Fermi bursts with known redshifts, are used to study the cosmological effects on the observed flux and fluence distributions.
|
|
|
Dynamical systems in cosmology
Knob, Lukáš ; Acquaviva, Giovanni (advisor) ; Loukes Gerakopoulos, Georgios (referee)
The main aim of this thesis is the analysis of different cosmological models from the standpoint of dynamical systems theory. We consider mostly spatially curved FLRW metric with different source terms, some of them possible candidates for dark matter and dark energy, particularly linear barotropic fluids, Chaplygin gas and canonical scalar field with exponential and general form of potential. We rewrite the cosmological equations as the system of the first order differential equations in dimensionless variables and study globally their phase space and the stability of the critical points. We also present few interesting features of models with interactions between two cosmic fluid constituents and mention dynamical properties of orthogonal Bianchi I models. 1
|
|
|
Standard and alternative cosmological models
Pulnova, Yelyzaveta ; Acquaviva, Giovanni (advisor) ; Žofka, Martin (referee)
The main aim of this thesis is the study of the dependence of the scale factor on the cosmic time for different models of Universe's evolution in the framework of the general theory of relativity. In this thesis we consider the FLRW metric and admit nonzero curvature. The models we consider differ from each other by the equation of state of the source, hence by the composition of the cosmic fluid under study. In this thesis the following models are discussed: ΛCDM (we consider a perfect cosmic fluid consisting of the incoherent dust, radiation and a cosmological constant in a curved space-time), generalized Chaplygin gas, and, also, two kinds of the scalar field (describing separately power-law inflation and the period after recombination). The numerical and analytical results obtained are processed graphically. 1
|
|
|
Concept of the Soul in Jainism
Linhart, Matěj ; Vojtíšek, Zdeněk (advisor) ; Bartošek, Josef (referee)
This thesis aims to summarize and explicate a conception of the soul in Jaina tradion with a presentation of appropriate context. The thesis is divided into three parts. The first part of the thesis is dedicated to Jaina metaphysics and cosmology. The second part is deditacated to the conception of the soul (jiva), karma and spiritual progress of a man. The last part is dedicated to the religious pracitces of Jains associated with this doctrine - especifically to the phenomenon of non-violence and voluntarily starvation to the dead (sallékhana).
|
guest ::
