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 15 of 15 for “"Disordered System"”.
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Interlayer Defect Effects on the Phonon Properties of Bilayer Graphene and its Nanoribbon
… has been employed to compute the phonon modes of disordered BLG. A downward linear shift of E2g mode frequencies has been observed with an increasing amount of defect concentration. Moreover, two identical E2g peaks have been observed in PDOS of the bilayer system where the individual layer …
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Bioinspired scattering materials: light transport in anisotropic, disordered systems
The study of light propagation in disordered media has attracted the interest of many researchers for its relevance to fundamental and applied problems, ranging from imaging through turbid media to the fabrication of white paint. Scattering in a disordered system is determined by the spatial …
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A Study of Narrowband Noise Characteristics Associated with Vortex Motion in High Temperature Superconductors
… as well. Both show a trend from an ordered to a disordered system with a washboard peak first increasing and then decreasing in power with increasing pinning efficiency. For both defect types the power spectrum is eventually dominated by broadband noise indicating the approach to the pinned …
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Developments in the Theory of X-ray Absorption and Compton Scattering.
… Green’s function theory. In strongly correlated systems, such as transition metal oxides, it is necessary to go beyond single particle treatment in order to reasonably describe peaks in XAS spectra. In this thesis I present a simplified, semi-empirical model which describes charge-transfer …
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Energy propagation in jammed granular matter
The systems built from dense granular materials are very important due to their relevance to a number of technological and other fields. However, they are difficult to study in particular due to a lack of accurate continuum description. In this work, studies on these systems are presented using …
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Unearthing the Anticrystal: Criticality in the Linear Response of Disordered Solids
The fact that a disordered material is not constrained in its properties in the same way as a crystalline one presents significant and yet largely untapped potential for novel material design. However, unlike their crystalline counterparts, disordered solids are not well understood. Though …
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Studying the direct effects of forces on embryonic stem cell behaviour
… with a conceptual model of force propagation in disordered environments, such as the nucleus of a cell. Using computational simulations, we studied how the large-scale behaviour of a disordered system depends on the microscopic structure. Contrary to common wisdom, we showed that disordered …
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Chaotic behaviour of disordered nonlinear lattices
In this work we systematically investigate the chaotic energy spreading in prototypical models of disordered nonlinear lattices, the so-called disordered Klein-Gordon (DKG) system, in one (1D) and two (2D) spatial dimensions. The normal modes' exponential localization in 1D and 2D heterogeneous …
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Observing residual structure in disordered peptides with multidimensional infrared spectroscopy
… 35% of the human proteome is intrinsically disordered. Disordered proteins play a key role in physiologic and pathologic regulation, recognition, and signaling making protein disorder the subject of increasing investigation. Since disordered samples do not generate x-ray quality crystals and …
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Application of compressional cooling to the study of nuclear ordering in solid helium three
… s R In 2, the entropy of a connpletely disordered system of spin ~ particles. However, at lower tennperatures appreciable nuclear ordering was observed. For exannple, at T * = 3.4 nnoK the measurennents gave S = 0.58 R = 0.83 R In 2. Using the effective spin Hamiltonian s [equation] …
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Extreme Disorder in Metal–Organic Frameworks
… relationships. Chapter 4 investigates how the disordered structure of Fe-BTC impacts its gas sorption ability compared to MIL-100. While the porous network within MIL-100 facilitates high uptakes of gas, the disordered structure of Fe-BTC leads to the emergence of highly sought-after …
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Nonlinear dynamics and chaos in multidimensional disordered Hamiltonian systems
… chaotic behavior of multidimensional Hamiltonian systems in the presence of nonlinearity and disorder. It is known that any localized initial excitation in a large enough linear disordered system spreads for a finite amount of time and then halts forever. This phenomenon is called Anderson …
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Topological phases, non-equilibrium dynamics and parallels of black hole phenomena in condensed matter
… of the fermion parity on the parameters of the system is purely determined by the oscillatory part of the Majorana wavefunctions. Using transfer matrix method, one can uncover a new boundary in the phase diagram, termed as `circle of oscillations', across which the oscillations in the …
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Polysequence Nanomaterials for Immunomodulation
… to adjust humoral and cellular responses systematically. A vaccine platform containing broadly reactive T-cell epitopes that boosts responses to co-delivered antigens with minimal inflammation could address these limitations. To that end, the focus of this dissertation was to create …
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Cavity-Based Approaches to Stochastic Dynamics on Sparse Graphs: From Ecological Systems to Epidemiological Inference
L'abstract è presente nell'allegato / the abstract is in the attachment