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 2363 for “"gravity"”.
-
Gravity Fails
Gravity Fails is a collection of four short stories and two memoirs that explore the ways in which characters adjust and fit into to a world that is destructive, fragmented and sometimes alien. Many of these pieces deal not with the moment of crisis, but with the aftermath. In "Gravity Fails," the …
-
Exploring gravity
… that could be observed assuming metric f(R)-gravity as an effective alternative theory. Gravitational radiation is modified, as are planetary precession rates. Both give a means of testing GR. However, existing laboratory measurements already place tighter constraints on f(R)-gravity, unless …
-
Heterotic Braneworld Gravity
… on a brane in a higher-dimensional bulk and gravity is modified. The heterotic braneworld scenario of Lukas, Ovrut, Stelle and Waldram (LOSW) is derived from Horava-Witten M-theory, where six of the eleven dimensions have been compactified on a Calabi-Yau manifold. The solution consists of …
-
Nonlinear gravity wave-wind interactions and jet stream gravity wave generation.
Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
-
The Mars Gravity Biosatellite as an innovative partial gravity research platform
The Mars Gravity Biosatellite is an unprecedented independent spaceflight platform for gravitational biology research. With a projected first launch after 2010, the low Earth orbit satellite will support a cohort of fifteen 14.5- to 25.5-week-old female BALB/cByJ mice for up to five weeks. During …
-
Spinors, embeddings and gravity
This thesis is concerned with the theory of spinors, embeddings and everywhere invariance with applications to general relativity. The approach is entirely geometric with particular emphasis on the use of natural structures. A clear indication of the interaction between the above topics is given; …
-
Topics in Theoretical Gravity
… Chapter 5 explores a modified theory of gravity called F(R) gravity which was proposed to solve the dark energy problem. We consider forms of F(R) that are intended to mimic standard General Relativity at high densities, but have low-density behavior that can explain the observed …
-
Modified Gravity with Torsion
… focuses on applications of a particular modified gravity theory, the extended Weyl Gauge Theory (eWGT), that was recently developed by Prof. Lasenby and Prof. Hobson. The applications corresponds to subsets of the full theory that are applicable to different cosmological and astrophysical sectors. …
-
Gauge theories of gravity
A novel alternative to Einstein's general theory of relativity is presented, based on the gauge principle. The gravitational Lagrangian has no Einstein--Hilbert term, but is constructed from quadratic invariants of the Riemann--Cartan curvature and torsion, constituting a geometric gauge theory of …
-
On gravity-driven flow
… of scientific interest under the umbrella of gravity- driven flow. In the first problem we analyse the effect of curved boundaries on the evolution of finite-release low-Reynolds-number exchange flow. From the equations of motion in an annular geometry we derive the governing nonlinear PDE for …
-
Topics in modified gravity
… gravitation. It replaced the Newtonian theory of gravity which was presented in the Principia in 1687. The fundamental idea in GR is that gravity is a manifestation of the curvature of the spacetime, while in Newton’s theory gravity acts directly as a force between bodies. Many of the predictions …
-
Exercise in artificial gravity
Artificial gravity provided by short radius centrifugation is considered a promising countermeasure to the deleterious physiological effects of microgravity during long-duration space flight. We investigated the feasibility of dual countermeasures to address space flight deconditioning of the …
-
The gravity of modern amplitudes: using on-shell scattering amplitudes to probe gravity
… are a viable way of studying certain aspects of gravity and showcase three such novel results here. First is the computation of the deflection angle of both light and gravitational waves due to a massive static body. We compute this from a purely on-shell amplitude perspective and find that the …
-
Gravity Waves in the Ionosphere
Made available in DSpace on 2014-12-10T19:06:37Z (GMT). No. of bitstreams: 1 7114703.pdf: 4056480 bytes, checksum: 8364296edaa297fe461b8f0058f611b1 (MD5) Previous issue date: 1970
-
Topics in gauge/gravity duality
… and its generalization in the ideas of gauge/gravity duality have had a profound impact in our understanding of strongly interacting quantum field theories. Roughly speaking, the correspondence maps the degrees of freedom of a $d$-dimensional quantum field theory in the strong coupling regime …
-
Astrophysical tests of modified gravity
… relativity has been the accepted theory of gravity for nearly a century but how well have we really tested it? The laws of gravity have been probed in our solar system to extremely high precision using several different tests and general relativity has passed each one with flying colours. …
Page 1 of 119