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 28 for “"scale dependence"”.
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Estimating scale dependence of saturated hydraulic conductivity in soils
Understanding the effect of scale on hydraulic and physical properties of soils has broad applications to scaling problems in hydrogeology, soil physics, and environmental engineering. The scale dependence of flow and transport is attributed to spatial heterogeneities, such as pore-size …
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Linking Prey to Predator: Scale Dependence and Oceanographic Influence in Marine Food Webs
… ecological processes operate at multiple scales from an individual predator up to ocean basin migrations, and research across these scales is extremely difficult. More accurate and detailed understanding of prey distributions relative to physical and biological features can greatly aid in …
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A next-to-leading-order calculation of proton-proton(proton-antiproton) to two jets, at least one of which contains a charm quark
… I discuss the leading order results and their scale dependence before outlining the difficulties of an NLO calculation, and the need for treating the charm quarks as massive in a few areas of the calculation. The NLO corrections turn out to be rather modest, but taking the calculation to NLO …
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The BioLighthouse: Reusable Software Design for Bioinformatics
… The BioLighthouse was tested for platform dependence and data-scale dependence with a microbial profiling pipeline. The microbial profiling pipeline consisted of Cutadapt, FLASH2, and DADA2. The pipeline was tested on 3 canola root and soil microbiome datasets with differing orders of …
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Shift and scale invariant preprocessor.
… information. The design rerroves time shift and scale dependence by taking advantage of invariant properties of a Fourier transform followed by a Mellin transform. The preprocessor is realized using an FFT and a Mellin transform with a conventional error correction term. The error term proves to …
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Probing the dynamic scaling hypothesis in 1-D coarsening particle systems
… that we employ is that characteristic length scales grow in time. The Dynamic Scaling Hypothesis which asserts that upon suitable scaling of space, features of latetime structures are indistinguishable is the main consideration in this thesis and we will investigate two 1-D coarsening …
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Using nuclear magnetic resonance and the dipolar field to study structural properties of two-phase liquid systems
… diamagnetic substances. The extraction of length scale information in liquid NMR spectroscopy is largely limited to sizes below the diffusion length (^ 50 microns). Breaking translational symmetry using the nuclear dipolar field imparts a scale dependence, and provides a means of measuring length …
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The Runny Gauge Plasma: shear viscosity to entropy for quarks and gluons
… to tree level amplitudes, and describe both the scale-dependence of the coupling and charge screening in a many- body system. We emphasise that because the effective interaction strength, for a QGP, may vary considerably at the relevant scales, the running of the coupling cannot be ignored. The …
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Ground state and thermal dynamics of strong interaction
… a local chiral four-fermion NJL-interaction at a scale of order 1 GeV. To address the non-perturbative dynamics, we derive renormalization group flow equations in next to leading order in the derivative expansion that go beyond the leading renormalizable couplings and include the entire bosonic …
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Modeling dislocation density evolution in continuum crystal plasticity
… may be in- cluded to detail the length-scale dependence of mechanical properties on the micron level. The full dislocation density description of plasticity allows a simple evaluation of the role of GND density in non-homogeneously deforming bodies. A local version of the constitutive …
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Design principles of mammalian signaling networks : emergent properties at modular and global scales
… the notion of signal duration and the time scale dependence of signal detection, and entropy based models of network architecture inferred from proteomics data. These problems are detailed below. The assembly of multiple signaling proteins into a complex by a scaffold protein guides many …
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Quantifying Geomorphic Features: Relative Albedos, Skeletonization, and Multifractality
… to interpret a lava flow’s type from the meter-scale geometry of its margin. We show that the previously unrecognized scale-dependence of these geometries and other complications (e.g., topographic confinement, transitional flow types) require a revised strategy for interpreting lava flow type …
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The macroecological distribution of avian functional diversity: environment, extinction risk and protected area coverage
… South and Southeast Asia are used to demonstrate scale-dependence; traits explain 21.4% of the variance in global extinction risk compared to 6.7% for local extinction with diet type more important in the former and use of manmade sites in the latter. Globally, narrow-ranging species are less …
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Crustal Stress Heterogeneity in the Vicinity of a Geothermal Field: Coso Geothermal Field, CA
… slope of power spectrum quantifies the length-scale dependence of stress rotations for the volume of the brittle crust penetrated by each borehole. Spectral analysis was applied to the depth variation of stress direction and it demonstrates that: (1) the data set contains distinct wavelengths …
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Microstructural evolution and phase stability of Cu/Nb nanolaminates subjected to severe plastic deformation by high pressure torsion
… regions, with a remarkably small coexistence scale of 5-10 nm. In a second step, the effect of the initial layer thickness on the microstructures observed in ARB composites after HPT deformation was investigated by comparing results obtained for ARB materials with nominal layer thickness of 18 …
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Modelling the impact of Phytophthora austrocedri on UK populations of native juniper (Juniperus communis s. l.)
… emerge in novel settings. This thesis uses multi-scale ecological modelling to understand environmental and land management factors driving patterns in infection and impact of the newly discovered oomycete pathogen, Phytophthora austrocedri, on juniper (Juniperus communis). I first surveyed …
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Modelling the current and potential distribution of woody plants, with special emphasis on the importance of spatial scale and environmental factors
… this thesis assesses the role of spatial scale in understanding the determinants of species distribution, modelling invasion spread, and taking conservation decisions. The species distribution databases were collated in a Geographic Information System from various sources (from field …
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Phononic metamaterials based on complex geometries : "a new kind of metamaterial"
… fractals-like geometry of in natures, the scale transformation (i.e. dilation or contraction) is included in the framework since fractal geometries shows structures at all scales (usually discrete and finite in physical world). We developed our framework using metamaterials since it enable …
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Influence of bottom topography on cross-shelf circulation forced by time dependent wind
… currents and the alongshore correlation scale. A periodic (along the coast) channel with geometry representative of continental margins is considered. Topographic disturbances have multiple alongshore wavenumber contributions, kT, and the amplitude proportional to kT-2 (except one …
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High-Energy Aspects of Inflationary Cosmology
… model, which traces the origin of the large-scale structure of the universe to quantum fluctuations during inflation. Although the basic framework of inflationary cosmology is now well-established, the microphysical mechanism responsible for the accelerated expansion remains a mystery. In …
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