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 246 for “"one dimension"”.
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High Energy Coupled Nucleon Tranpsort in One Dimension
… transport equation is derived and solved in one dimension. The production term for secondary generation nucleons due to nuclear fragmentation includes 'coupling' of the flux to other types of nucleon projectiles. A physically motivated perturbation series approach is developed to enhance …
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Computational Studies of Correlated Electrons in One-Dimension
… and the Peierls-extended Hubbard models in one dimension using primarily computational methods. We discuss the derivation of the models and the computational methods used to study them, focusing primarily on our extensions over existing numerical methods. In particular, we present the …
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Stochastic Homogenization of Nonconvex Hamilton-Jacobi Equations in One Dimension
… consider nonconvex Hamilton-Jacobi equations in one space dimension. We provide a fully constructive proof of homogenization, which yields a formula for the effective Hamiltonian. Our proof employs sublinear correctors, functions extensively discussed in the literature. The proof involves strong …
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Numerical methods of characterizing symmetry protected topological states in one dimension
… dissertation, we use numerical methods to study one dimensional symmetry protected topological (SPT) phases. We focus on the density matrix renormalization group (DMRG) methods and explore the machine learning methods. We investigated different SPT phases in the context of interactions and …
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Measurement of electron-electron interactions in one dimension with tunnelling spectroscopy
The properties of fermions in one dimension are markedly different from those in higher dimensions. In two or three dimensions, the many-body behaviour of fermions is described by the Fermi liquid model, whose most prominent result is that, instead of studying the behaviour of individual particles, …
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Bifurcations in the Echebarria-Karma Modulation Equation for Cardiac Alternans in One Dimension
… under some approximation,</p><p>which after nondimensionization is as follows: </p><p> &partial<sub>t</sub> a = σ a + <bold>L</bold> a - g a <super>3</super>,</p><p>where the linear operator</p><p> <bold>L</bold> a = &partial<sub>xx</sub>a - &partial<sub>x</sub> a -Λ<super>-1</super> ∫ …
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In pursuit of conjugation in one-dimension: Synthetic studies of oligomeric and polymeric organic materials
… Tungstenatetrahedrane Intermediate A cyclopropenone-modified dibenzocyclooctyne will undergo a single ring opening alkyne metathesis reaction in the presence of Schrock's tris(tert-butoxy)tungsten(VI) neopentylidyne--a highly active alkyne metathesis catalyst. Despite the enormous amount of ring …
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The influence of cylindrical charge geometry on the velocity of blast-driven projectiles in one dimension
… The blast arrangement was simulated using a two-dimensional, axisymmetric model. The maximum velocity, average velocity, impact velocity, total axial impulse and localised impulse were 'extracted' from the simulations. The simulated velocities agreed well with experimental measurements, showing …
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Collective excitations in low dimensional systems and stochastic control of population growth in a fluctuating environment
… integrals. The theory also shows that in one dimension the collective excitation of a bosonic system can be unified with that of a fermionic system, which is described by Luttinger liquid theory. The unified theory of collective excitations of low dimensional quantum systems motivates my …
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Low Energy Excitations of 1D Fermi Gases
Fermions in one dimension are vastly different from their higher-dimension counterparts. At the same time, many theoretical models in one dimension have the luxury of being integrable and exactly solvable, which makes them excellent test beds for quantum simulation. In using these test beds, we can …
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Vibrotactile pattern recognition on the torso with one and two dimensional displays
… inputs. A second set of experiments involved a one-dimension tactile array of eight tactors worn around the waist. The results indicated that the subjects could recognize the six circumferential patterns presented with an accuracy of 98-100% correct. A further experiment confirmed that the …
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Degenerate elliptic second-order differential operators with bounded complex-valued coefficients
… contribution of the thesis is in two parts. In one dimension we characterise when the space of test functions is a core for these operators. In higher dimensions we provide sufficient conditions ...
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Developmental Shifts in Stimulus Processing (Classification, Discrimination, Autism)
… sets of results in low-mental age children. In one cluster of studies, research has indicated that young children respond to several cues within a stimulus object. In a second cluster of studies, researchers have found that young normal and autistic children typically respond to only one …
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A thesis of architecture
As we move from one dimension to the next, there are cycles from cosmic to chaotic order, each element is part of a bigger one. It can be concluded there is a whole to which all things form part, the parts can be seen as articulations of the whole. It makes sense that the whole which contains all …
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Parabolic equations without a minimum principle
… a two-point boundary value problem for a one dimensional diffusion equation. We show the uniqueness and existence of the solution for initial data, which may not be continuous at two boundary points. We also examine the circumstances when these solutions admit a probabilistic …
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The use of corporate reputation in the development of brand image strategy in the Taiwanese pharmaceutical industry
… of the uses of corporate reputation has three dimensions: value creation, strategic resources and corporate communication. Each of these three dimensions includes several items. The items were proposed based on the previous researchers’ summaries and the qualitative interview. The researcher …
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The problem of spin and charge separation in condensed matter
… insulators at half-filling. It is known that one dimensional strongly correlated electronic systems display the phenomenon of spin and charge separation. We show that there exists a qualitatively different mechanism for the separation of spin and charge for two and higher dimensional strongly …
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Density perturbations in hybrid inflation
… supersymmetry. In this thesis we carry out a one dimensional numerical simulation to verify the untested analytic approximation of Radall et al. The results show a good agreement for a wide range of parameters. We also propose a new method for calculating density perturbations in hybrid …
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