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.
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Showing 1 to 20 of 610 for “"Two dimensions"”.
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Insulator -Superconductor Transitions in Two Dimensions
In the fifth part we analyze the behavior near the 2D IST in the presence of a perpendicular magnetic field. We show that with increasing field H, the QD and QC regimes, in which vortex degrees of freedom are suppressed, crossover to a new magnetically activated (MA) regime, where the correlation …
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Insulator-Superconductor Transitions in Two Dimensions
… transition (IST) points in two dimensions. The first part is devoted to the description of the relevant experiments that motivated our work. After introducing the techniques necessary to handle the description near the IST, we consider the fluctuation conductivity near the …
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Underwater shape reconstruction in two dimensions
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1994.
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DUALITIES IN FOUR, THREE AND TWO DIMENSIONS
Modern Physics is grounded on two apparently irreconcilable descriptions: Quantum Field Theories (QFTs) and Gravity. Two major challenges for Theoretical Physics are represented by the understanding of the strong coupling regime of Quantum Field Theory and by the reconciling of QFT with classical …
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Commonality in Two-Dimensions: An Empirical Investigation
… regression to model the commonality in Chapter Two. The literature on the study of return commonality generally attributes its source to the order flow. But I find that return and order flows are endogenous and use the new exogenous Twitter sentiment dataset to show that return commonality may …
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Backward stochastic Navier-Stokes equations in two dimensions
There are two parts in this dissertation. The backward stochastic Lorenz system is studied in the first part. Suitable a priori estimates for adapted solutions of the backward stochastic Lorenz system are obtained. The existence and uniqueness of solutions is shown by the use of suitable …
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Duality and strongly correlated systems in two dimensions
… systems near quantum critical points in two spatial dimensions. Examples range from the sharing of critical exponents (superuniversality) among quantum Hall plateau transitions to the emergence of a charge-vortex symmetry near the field-tuned superconductor-insulator transition in thin …
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Stochastic Wave Equations With Cubic Nonlinearities in Two Dimensions
… Wave equations with cubic nonlinearities in two dimensions. I evaluated the stochastic nonlinear wave equation in terms of its Fourier coecients. I proved that the strong solution of that equation exists and is unique on an appropriate Hilbert space. Also, I studied the stability of …
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Molecular dynamics simulation studies of fracture in two dimensions
Thesis (Nucl.E)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1980.
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Notes on Some (0,2) Supersymmetric Theories in Two Dimensions
This thesis is devoted to a discussion of two-dimensional theories with (0,2) supersymmetry. Examples of two-dimensional (0,2) gauged linear sigma models (GLSMs) are constructed for various spaces including Grassmannians, complete intersections in Grassmannians, and non-complete intersections such …
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Electromagnetic response of time-reversal breaking metallic phases in two dimensions
We explore two phases in two-dimensional electron fluids in which the time-reversal symmetry is broken spontaneously by using the method of higher dimensional bosonization. Mean-field calculations show that the order parameter is two two-component real vectors [Sun and Fradkin 2008]. There are two …
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Response curves of deterministic and probabilistic cellular automata in one and two dimensions
… We derive response curve formulae for many two-dimensional deterministic CA rules with L-neighbourhood. For all remaining rules, we find experimental response curves. We also use preimage sets to classify surjective rules. In the last part of the thesis, we consider a special class of …
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The Numerical Simulation of a Thunderstorm Cell in Two-Dimensions and Three-Dimensions
Made available in DSpace on 2014-12-10T20:13:36Z (GMT). No. of bitstreams: 1 7310083.pdf: 3096512 bytes, checksum: dad3c5fae21b432be1a3c2ff72fcc6b7 (MD5) Previous issue date: 1972
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Interfacial properties of fluid phases in two dimensions and of three-component surfactant systems
In this thesis, we study two fundamental problems in the theory and experiment of interfaces in simple and complex fluids. The first problem concerns the critical behavior of the thickness of interface of simple fluids in two dimensions of space. We study this problem using both theory and computer …
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Magnon heat transport and magnon-hole scattering in one and two dimensions spin systems
… has been investigated experimentally. In the two dimensional Heisenberg antiferromagnet La2CuO4 already slight hole doping (~1 %) almost completely suppresses k_mag. Comparison with k_mag of Zn-doped La2CuO4 reveals that magnon-hole scattering is even stronger than cattering on static magnetic …
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The dual boundary element method applied to semi-infinite surface cracks in two-dimensions
The goal of his thesis is to evaluate the stress intensity factors (SIF) for surface cracks in semi-infinite solids via the DBEM. We first detail the derivations of the boundary element and dual boundary element methods. The main difficulty with these methods are integrations of the singular …
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The Born-Oppenheimer Approximation for Triatomic Molecules with Large Angular Momentum in Two Dimensions
… for a symmetric linear triatomic molecule in two space dimensions. We compute energy levels up to errors of order ε⁵, uniformly for three bounded vibrational quantum numbers n₁, n₂, and n₃; and nuclear angular momentum quantum numbers â ≤ kε<sup>-3/4</sup> for k > 0. Here the small parameter ε …
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