Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 536 for “"cosmology"”.
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Quintessence Cosmology
In dieser Arbeit diskutieren wir kosmologische Modelle in denen ein skalares Quintessenz Feld die dunkle Energie im Universum beschreibt. Nach einer kurzen Einf\"uhrung in die bekannte Kosmologie erweitern wir unsere Analyse und diskutieren St\"orungsrechnung in der Allgemeinen …
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Effective Computational Cosmology
… to attempt to answer outstanding questions in cosmology (and all field of physics, for that matter). This work investigates how the use of both EFTs and computational tools can help us to advance our knowledge of how the universe evolved and formed over time. Specifically, we review the …
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Topics in cosmology
… discusses some issues related to observational cosmology. After an introductory chapter including an overview of the thesis, PART I starts with a discussion of the covariant approach to cosmology, introducing notation needed in the thesis. The covariant approach to perturbations is then …
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An Earthly Cosmology
The following thesis project explores the design of a nature center and planetarium within Rock Creek Park, in Washington, DC. The project evolved from a desire to re-imagine a relationship with nature in a way that allows conversation, reflective thinking, and allows one's sense of wonder to enter …
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Cosmology through gravitational lenses
In dieser Dissertation nutze ich den Gravitationslinseneffekt, um eine Reihe von kosmologischen Fragen zu untersuchen. Der Laufzeitunterschied des Gravitationslinsensystems HE1104-1805 wurde mit unterschiedlichen Methoden bestimmt. Zwischen den beiden Komponenten erhalte ich einen Unterschied von …
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Quasars, clusters and cosmology
Thesis (Ph. D.)--Michigan State University. Physics and Astronomy, 2010
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Topics in stringy cosmology
This thesis is composed of two distinct research topics. The first topic concerns Randall-Sundrum cosmological models, in particular their isotropization properties at early times. We first study the state space of inflationary braneworld models with exponential potential and identify the past and …
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Topics in contemporary cosmology
Includes bibliographical references.
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Aspects of modern cosmology
… with a hierarchy of distance measures in cosmology, forming an introduction to the following two chapters. ■ A common belief that photon conservation implies that the all-sky averaged area distance in inhomogeneous universes must be that of the background, matter-averaged Robertson-Walker …
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Beyond the concordance cosmology
Includes abstract. Includes bibliographical references.
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Topics in relativistic cosmology: Cosmology on the past lightcone and in modified gravitation
… angular deviations are not considered. Standard cosmology based on General Relativity is generally believed to have serious shortcomings, such as the unexplained issues of dark matter and dark energy. As a remedy, many alternative theories of gravitation have been proposed over the years, one of …
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Cosmology and galactic angular momenta
<p>The plan of this paper is to present some observations and then in subsequent chapters to examine the two basic cosmological ideas in the light of these observations.</p><p>The first of the observations involves an estimate of the angular momentum in a given volume of space and the ratio of this …
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Effective Field Theories in Cosmology
… detailed cosmological observations have promoted cosmology to the rank of high-precision science. Remarkably, all the observations currently available can be accounted for by assuming that (<em>i</em>) the universe is approximately homogeneous and isotropic on large scales, (<em>ii</em>) …
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Cosmology with Weak Lensing Peaks
… as well as in how the distributions depend on cosmology, demonstrating that the peaks contain non-Gaussian information. To explicitly quantify the information content of the peaks beyond the power spectrum, we use the Fisher matrix method to forecast errors in the three-dimensional parameters …
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Unusual Matter Models in Cosmology
… fundamental bases, including bulk viscous cosmology, loop quantum gravity, k-essence, and brane-world cosmologies. We find a range of exact solutions for isotropic universes, discuss their behaviours with reference to the early- and late-time evolution, accelerated expansion, and the …
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