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 18 of 18 for “"Energy propagation"”.
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Energy propagation in jammed granular matter
… the main emphasis on understanding phenomena of energy and force propagation. Analysis of energy propagation in a two-dimensional disordered system is carried out by considering the propagation of information away from an oscillating boundary which is characterized by both temporal and spatial …
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Near-Field Pressure Distributions to Enhance Sound Transmission into Multi-Layer Materials
… between air and most solids prevents significant energy transfer from incident acoustic waves across the air-material interface. Refraction also plays a role in preventing acoustic transmission, as the wave speed difference between air and solid materials results in an increase of the resulting …
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Logic and Mechanism of an Evolutionarily Conserved Interaction in PDZ Domain
… the energetic architecture and the mechanisms of energy propagation. Structural, dynamics, and mutagenesis experiments have revealed that anisotropy and cooperativity are common features of the energy propagation in proteins; however, a complete understanding of the patterns and mechanisms of …
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Reactions of aluminum with halogen containing oxides
… fuel and oxidizer can exhibit high flame propagation speeds on the order of 1000m/s when burning in an unconfined environment. In particular, halogen based formulations such as aluminum and iodine pentoxide have received significant attention due to both high flame speeds and biocidal …
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Numerical simulations of dense granular systems with and without cohesive effects
… simulations. At the beginning of this work, the energy propagation is considered in a stochastic granular chain in one spatial dimension (1D). The main finding here is that the properties of the stochastic noise influences strongly the process of energy propagation. As it is shown, the issue of …
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Linkages between Eurasian snow cover and Northern Hemisphere winter-time climate variability
… approach is analysis of the wave activity and energy propagation in the troposphere and stratosphere.
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Resonance in dispersive wave systems
… for the case analogous to the double resonance, energy propagation and transfer at the group velocity predicted by the continuous theory was seen. But differences also persisted in the time scales which reinforced the subtle, yet significant, distinction between the continuous and discrete points …
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Mechanistic modelling of single-floor office environments
… In order to deploy systems effectively, propagation models that can reliably and yet efficiently characterise radio propagation behaviour are needed. This thesis describes the philosophy, the logical development, and the performance of a mechanistic modelling approach which is intended …
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Nonlinear structural design using multiscale topology optimization
… microstructures to achieve effective energy propagation in structures subjected to impact loading. The design process is formulated under the assumption that the primary wave of interest has much longer wavelength compared to the microstructural length scale. Under such an assumption, …
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Strategies for limiting interference and interception of free space optical communications
… propose a method of controlling the direction of energy propagation from an optical transmitter to maximize the power received by the remote terminal of a link while limiting the power received in a broadly defined region within the main lobe of the transmission. We consider specifically an …
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Investigating the rate-limiting step of mitochondrial complex I catalysis
… electron transfer chain (ETC). It couples the energy released from NADH oxidation and ubiquinone (Q) reduction to the translocation of four protons across the inner mitochondrial membrane, contributing to the proton motive force (PMF) used to synthesise ATP. Although structural knowledge of …
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Thermal creak induced dynamics of space structures
… slips and releases some of the stored elastic energy. Such a nonlinear release mechanism will induce impulsive broadband and possibly high frequency loading to the system, in response to low frequency thermal excitations. This phenomenon is referred to as thermal creak. Nonlinear joints with …
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Paracoccus denitrificans as a model system for studying the mechanism of respiratory complex I
… a crucial metabolic enzyme that couples the free energy released from NADH oxidation and ubiquinone reduction to the translocation of four protons across an energy-transducing membrane, contributing to the proton motive force used to synthesise ATP. Although structural knowledge of complex I is …
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Frequency Dependent Mechanical Properties of Elastic Metamaterials with Locally Resonant Microstructures
… This phenomenon was studied from the energy propagation point of view. Based on the monatomic mass lattice model, two band gap formation mechanisms were proposed. For each representative element, considering the time period when effective mass velocity increases from zero to maximum, …
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The vertical propagation of inertial waves in the ocean
… has been related to the direction of vertical energy flux due to the observed waves. Whereas the observed vertical phase propagation can be affected by horizontal advection of waves past the point of observation, the use of wave polarization to infer the direction of vertical energy propagation …
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Makassar Strait Intraseasonal Variability
… and a waveguide for transmitting subinertial energy from the tropical Indian Ocean to Indonesian seas, is investigated, using the 2004-2006 International Nusantara Stratification and Transport (INSTANT) observations. The INSTANT current and temperature timeseries in the Labani Channel, a …
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Observations of wave-mean flow interaction in the Pacific Equatorial Undercurrent
… tropical instability waves to the momentum and energy balances of the Pacific Equatorial Undercurrent is investigated using velocity and temperature time series from the three-dimensional Equatorial Pacific Ocean Climate Study mooring array at 110°W. Tropical instability waves are an energetic …
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Dynamical Reduced-Order Models for High-Dimensional Systems
… realistic ocean acoustics and underwater sound propagation with dynamic coordinate transforms, and stochastic reachability and time-optimal path planning. The majority of this work is devoted to new adaptive integration schemes for the DLRA. We start by introducing perturbative retractions, …