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 27 for “"stress-energy"”.
-
Improvement of Stress -Energy Tensor Using Space -Time Symmetries
… it is always possible to improve the symmetric stress-energy tensor of a renormalizable relativistic field theory over (3+1)-dimensional flat space-time manifold. The improved stress-energy tensor defines the same field energy-momentum and angular momentum as the conventional tensor, and it is …
-
Improvement of stress-energy tensor using space-time symmetries
… it is always possible to improve the symmetric stress-energy tensor of a renormalizable relativistic field theory over (3+1)-dimensional flat space-time manifold. The improved stress-energy tensor defines the same field energy-momentum and angular momentum as the conventional tensor, and it is …
-
Quantum Effects of the Massless Spin One-Half Field in Static Spherically Symmetric Black Hole and Wormhole Spacetimes
The full renormalized stress-energy tensor for the massless spin one-half field is numerically computed on and outside the event horizon of an extreme Reissner-Nordstrom black hole and on and outside the throat of three static spherically symmetric Lorentzian wormhole spacetimes. The field and all …
-
Linear and non-linear collisionless many-particle systems
… set to show quantitative decay estimates for the stress energy momentum tensor of matter. In particular, we prove exponential decay for the stress energy momentum tensor in a bounded region of spacetime. The main result requires precise estimates for the derivatives of the Vlasov field, which we …
-
The trial of the holographic principle
… to a hydrodynamical expansion of the stress-energy tensor of the dual fluid. The stress-energy tensor of the dual fluid, whose conservation arises as a consequence of Einstein field equations of the dual black hole, is calculated via the Brown-York prescription augmented with …
-
Investigating the fine milling of pigment in a colourant formulation on the Bühler PML2 Superflow mill
… actually been reached, without excessive time or energy. Including particle size analysis, to enable the analysis of energy efficiency and production performance, could assist to understand the impact of the various milling parameters. This study compares the various experimental approaches that …
-
Even Parity Perturbations of the Janis-Newman-Winicour Singularity
… field equations and the divergence of the stress-energy tensor, one obtains 8 independent radial equations for the first-order metric perturbations and scalar field perturbation. Through a suitable functional transformation, one can determine a coupled wave equation between a perturbing …
-
Probabilistic Schwarzian Field Theory
… disc. It is also expected to arise in the low energy limit of the Sachdev--Ye--Kitaev random matrix model. In Chapter 2 we rigorously construct a finite measure on $\Diff^1(\T)/\SL(2, \R)$, which corresponds to the Schwarzian Theory and compute its partition function (i.e. total mass). Here …
-
Computational Modeling of Eye Trauma for Different Orbit Anthropometries and Different Projectile Impacts
… and computational model outputs including stress, energy, and pressure that can be used to evaluate risk of eye injury.
-
Investigation of operating parameters in a vertical stirred mill
… grinding finer. Grinding to these fine sizes is energy intensive and using standard ball mills are energy inefficient at these sizes (P80 < 75μm). Therefore, stirred mills are becoming increasingly prevalent in the mineral processing industry. In order to optimize these mills, the effects and …
-
Distict element numerical modelling of volcanic debris avalanche emplacement geomechanics.
… spatial/temporal variations in avalanche body stress, energy and deformation to be considered in relation to the development of characteristic deposit features. A more sophisticated bonded particle model is then utilized to allow the consideration of emerging brittle behaviour. Resulting …
-
Electron Beam Machine for Continuous Metallurgical Processes
… Additionally a method for generating the stress-energy tensor of a given system is presented, and derived for the generalised theory. Its advantages are shown to be numerous, The prediction of electron beam behaviour in electromagnetic fields is reduced to that of simultaneously solving a …
-
The phase transition of the rubidium halides
… simple Born model for the interatomic potential energy is sufficient to successfully predict the cohesive energies, the transition pressure, the effects of non-hydrostatic stress, energy differences, and the volume changes at the transition in the Rubidium Halides. Although we agree with an …
-
Structure of Turbulent Boundary Layers and Surface Pressure Fluctuations on a Patch of Large Roughness Elements
… statistics were calculated as well velocity energy spectra. Surface pressure fluctuations were measured using a two-microphone subtraction method. The results show that hemispherical elements produce larger turbulence quantities in their wakes compared to the cubes. This is due to the …
-
Cure induced stress generation and viscoelasticity in polymer coatings.
… use of volatile solvent unnecessary, decreasing energy use and making the process more environmentally friendly but photoinitiators can be toxic, limiting certain applications. Stress may be generated by a changing specific volume during cure, and stress-induced defects are undesirable. The goal …
-
Probes of strong-field gravity
… of this thesis is a study of the propagation and energy content of gravitational waves in these theories. I find that in a large class of theories, approaching the asymptotically at part of spacetime, gravitational waves propagate in the same fashion as in GR and have the same effective …
-
Psychological pathways influencing body fat changes among restrained eaters: Stress, eating and exercise behaviors
A prospective study was conducted to test eating (energy intake) and exercise behaviors (energy expenditure) as explanations of stress-induced body fat gain of high restrained eaters (dieters), a group identified as being vulnerable to obesity. Participants were female high restrained eaters and …
-
Universal properties of the entanglement entropy in quantum integrable models
… function of the twist field and the trace of the stress-energy tensor. This allows us to introduce a class of composite twist fields, which were the main topic of Levi [2012]. In the fifth and last chapter we group the most common methods used to study the entanglement entropy of quantum spin …
Page 1 of 2