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 24 for “"Energy dynamics"”.
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Challenges in the hunt for dark energy dynamics
… observed acceleration of the Universe. The 'dark energy' believed to supply the negative pressure responsible for this cosmic acceleration remains elusive despite over a decade of investigation. Hunting for deviation from the 'vanilla' cosmological model, ACDM, and detecting dynamics with redshift …
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Implementation of cybersecure observers and control in microgrids; energy dynamics based approach
… essentially small blocks that make up the larger energy grid and they are independent, meaning they can function separately and autonomously from the larger energy grid. These microgrids need to stabilize and produce the appropriate amount of power for the loads. In this thesis we adopt energy …
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Distributed Energy Dynamics Control for Stable Power Electronic-Enabled Electric Power Systems
… stability and scalability. This thesis adopts an energy space modeling approach grounded in first principles of energy conservation and system interconnection. It extends the previously introduced second-order energy dynamics model by relaxing the assumption that energy in tangent space can be …
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Spectral Energy Dynamics and Wavevector Resonance in a Weakly Nonlinear Chaotic Elastodynamic Billiard
… waves within an elastic body leads to spectral energy redistribution. The coupling strength can exhibit a sharp increase as a function of frequency due to wavevector coincidences between constituent waves of different wave types. The phenomenon is investigated for an ensemble of weakly nonlinear …
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Urban Building Networks' Thermal-Energy Dynamics: Exploring, Mitigating, and Optimizing Inter-Building Effects
… As a major contributor to rapidly growing global energy expenditures, urban buildings are often designed and operated inefficiently despite their significant contributions to carbon emissions, triggering environmental deterioration locally and worldwide. Moreover, ongoing industrialization and …
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Aggregate model and analysis of the energy dynamics in the Kingdom of Saudi Arabia
… crisis in the near future centered on increasing energy consumption. Today, the kingdom consumes approximately 1/3 of its oil production. If no action is taken and the kingdom continues business as usual, by 2026 it will consume 50% of its production, and by 2047 its entire production. A large …
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Changes in the invertebrate populations, fish populations, and water chemistry of a small stream above and below two impoundments
… with the ponds appeared to be an alteration of energy dynamics. The alterations were seasonally dependent, and may have resulted from interception of larger particle organic matter being transported downstream and its replacement by finer organic matter. The alterations manifested themselves in …
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A measure of the natural potential of land for supporting deer populations
A model of the inter- and intra-seasonal energy flow through deer populations ,.;as developed through the use of the existing literature. The model was programmed in Fortran IV for computer based use in evaluating the potential biological productivity of land for deer. The model was developed …
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Effects of dynamic vegetation and topography on hydrological processes in semi-arid areas
… resource. This work focuses on vegetation-water-energy dynamics occurring in the complex terrain of a semi-arid area characteristic of central New Mexico. The study constructs a dynamic model of coupled interactions, [tRIBS+VEGGIE], that considers essential water and energy processes over the …
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Coupled transport in natural porous media
… The model was used to simulate the water and energy dynamics of a permafrost soil. A good qualitative agreement was achieved. Differences between modeled and measured data could be explained with heterogeneity in combination with the model's sensitivity to a change in hydraulic parameters. …
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The Consequences of Non-Native Species Invasions on the Contemporary and Historic Trophic Ecology of Native Sport Fish in a Lake Michigan Embayment
… spp.</em>) in Lake Michigan has strongly altered energy flow by sequestering nutrients in nearshore benthic habitats. Despite these ecosystem changes, little is known about their influence on resource partitioning in nearshore fish communities. Here we use stable isotope analysis to characterize …
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Weathermart
… environment. Supermarkets now consume excess energy by heating and cooling in one giant open space. I am proposing a new typology of a supermarket that is organized thermodynamically into small chambers of different temperature zones to both mediate energy loss and enable external conditions …
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Towards a Temporal Theory of Ecology: Body Mass Role for Activity Patterns of North American Artiodactyls
Energy dynamics can shape ecological patterns and impact the evolutionary trajectory of a species. The metabolic theory of ecology links body mass to multiple ecological traits. This study seeks to extend these insights to activity patterns at a macroecological scale, using the large repository of …
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Magnetic Weyl Semimetals for Spintronic Applications
… and experimental investigations, the magnetic dynamics of Mn₃X and the spin-polarized tunneling in Co₂MnGa based spintronic devices remain not fully explored. In this thesis, I establish a theoretical framework to describe the low energy dynamics of strained Mn₃X. Using perturbation theory, I …
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On the Understanding of the Coastal-Urban Nexus of Weather, Air Quality and Energy
… between atmospheric processes, building energy consumption, and air quality, particularly during periods of seasonal extremes such as summer ozone peaks and winter heating. Accurate representation of these interactions in urban modeling is crucial for understanding and addressing air …
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The geometry and representation theory of superconformal quantum mechanics
… and $\mathfrak{osp}(4^*|4)$ explicitly. The low-energy dynamics of Yang-Mills instantons is an example of the latter and arises naturally in the discrete light-cone quantisation (DLCQ) of certain superconformal field theories. In particular, we study in some detail the quantum mechanics arising …
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Ecological-Hydrological Feedback in Forested Wetlands
… forest and associated tree stressors on surface energy and water fluxes. Objectives were to determine effects of flooding on evaporation rates and energy dynamics, tree water use and growth responses to river-floodplain connectivity and water level variability, and interactions between tree-level …
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Impaired ketogenesis is implicated in intestinal stem cell function and epithelial regeneration in ulcerative colitis
… and resultantly are vulnerable to changes in energy dynamics in the intestine. Mitochondria, which amongst other functions are critical for energy production are therefore crucial for maintenance of the stem cell niche are significantly implicated in UC pathogenesis. Up to now, the mechanisms …
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Circuit Support for Practical and Performant Batteryless Systems
… have demonstrated the feasibility of harvesting energy on-demand from the environment as a practical alternative to classical battery power, instead buffering harvested energy in a capacitor to power intermittent bursts of operation. Energy harvesting circuits are miniaturizable, inexpensive, and …
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