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 116 for “"Energy Flow"”.
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Energy flow in nonlinear circuits
… reactive power are two critical quantities in energy flow studies in electrical power systems. Existing definitions for these terms work well when both voltages and currents are sinusoidal with respect to time. However, both apparent and reactive power have no physical meaning. When these …
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Energy Flow in Particle Collisions
… collider physics, beginning from the observable energy flow: the energy distribution produced by particle collisions. First, I establish a metric space for collision events by comparing their energy flows. I unify many ideas spanning multiple decades, such as observables and jets, as simple …
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Vibrational energy flow in substituted benzenes
Made available in DSpace on 2014-05-30T16:39:21Z (GMT). No. of bitstreams: 2 Brandt_Pein.pdf: 12807171 bytes, checksum: 7971e5d3c0720847bd4a4a8b6745db92 (MD5) license.txt: 4058 bytes, checksum: 7879642b09f616239fdcff48f73d1180 (MD5)
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Energy Flow in a Floodplain Aquifer Ecosystem
We developed an energy budget to identify energy sources for the invertebrate community of a large 20 km2 floodplain aquifer, based on biomass distributions, organismal respirometry, in situ community respiration, mesocosm and microcosm experiments, stable isotopes and invertebrate gut contents. …
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Energy Flow in a Floodplain Aquifer Ecosystem
We developed an energy budget to identify energy sources for the invertebrate community of a large 20 km2 floodplain aquifer, based on biomass distributions, organismal respirometry, in situ community respiration, mesocosm and microcosm experiments, stable isotopes and invertebrate gut contents. …
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Dynamics of vibrational energy flow, quantum computing and laser assisted fusion
… quantum dynamics, intramolecular vibrational energy flow and gas phase vibrational spectroscopy. In the first area, we showed theoretically that the maximum fidelity reachable with vibrational qubits is approximately 0.9999 and 0.99 for one and two qubits gates, using conventional pulse shaper …
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Analysis of energy flow in controlled structures subject to initial conditions
This work investigates power flow and energy transfer in controlled structures. If the goal of control is to stop an initially vibrating structure, energy must be forced out through dissipating components. The analysis performed here quantifies energy being transferred internally and externally to …
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Non-invasive Method to Measure Energy Flow Rate in a Pipe
Current methods for measuring energy flow rate in a pipe use a variety of invasive sensors, including temperature sensors, turbine flow meters, and vortex shedding devices. These systems are costly to buy and install. A new approach that uses non-invasive sensors that are easy to install and less …
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Current source dc-dc and dc-ac converters with continuous energy flow
… range from 0 to unity power factor, with power flow in both directions (unlike the conventional six-pulse current inverter). Additionally, a nonlinear control strategy, sliding mode control, is implemented with to achieve faster dynamic inverter response during faults as well as elimination of …
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The material and energy flow through the abrasive waterjet machining and recycling processes
… this thesis was to investigate the material and energy flow through the abrasive waterjet machine and the WARD recycling machine. The goal was to track all of the material, water, abrasive, energy, air, and tooling through the different components of the machining and recycling processes. The …
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An Illustrative Look at Energy Flow through Hybrid Powertrains for Design and Analysis
… model described within this work aims to allow energy to be simply and understandable traced through a hybrid powertrain. Through the use of a 'backwards' energy tracking method, demand for a drive cycle is found using a drive cycle and vehicle parameters. This demand is then used to determine …
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Patterns of energy flow in populations of the dominant insect consumers on Marion Island
… of sub-Antarctic Marion Island. Patterns of energy flow in individuals ("life strategies") and populations (population energetics) of the five species were studied against the evolutionary templet of their respective microhabitats. Energy flow through populations of the five species was used …
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Computational and Experimental Studies of Coherence and Energy Flow in Microscopic and Mesoscopic Systems
The dynamics of STM based hydrogen desorption at silicon surfaces is another process in which an open systems approach is appropriate. Therefore, we adopt a master equation model previously applied to this problem, and propose resonant IR overtone excitation of the surface Si-H vibration as a …
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Intelligent Non-Invasive Thermal Energy Flow Rate Sensor for Laminar and Turbulent Pipe Flows
… of an intelligent non-invasive thermal energy flow rate sensor for laminar and turbulent pipe flows. Energy flow rate is the thermal energy that is carried by a fluid, for example, in a pipe to heat or cool a space in a building. It can be measured by an energy flow rate sensor which …
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ENERGY FLOW AND MACROINVERTEBRATE PRODUCTION IN PANAMANIAN HIGHLAND STREAMS: ASSESSING THE IMPACTS OF AMPHIBIAN DECLINES
… in Streams (TADS) project, I quantified major energy fluxes, secondary production, and macroinvertebrate community structure for two consecutive years in four stream reaches in the Panamanian uplands, two with healthy amphibian populations and two that had experienced amphibian declines in …
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VTool: A Method for Predicting and Understanding the Energy Flow and Losses in Advanced Vehicle Powertrains
As the global demand for energy increases, the people of the United States are increasingly subject to high and ever-rising oil prices. Additionally, the U.S. transportation sector accounts for 27% of total nationwide Greenhouse Gas (GHG) emissions. In the U.S. transportation sector, light-duty …
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Ultrafast dynamics in complex molecular solids: Ultrafast imaging of laser ablation of PMMA and theory of mechanical energy flow in ultrahot crystalline naphthalene
… solid, there is an ultrafast transfer of energy between the internal molecular vibrations and the external modes or lattice vibrations. Two interesting examples involving this energy transfer are presented in this thesis. First, an ultrafast imaging apparatus is constructed and used to …
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Changes in food web structure and energy flow in kelp forest ecosystems on the south-west coast of South Africa following the invasion of Jasus lalandii
In the early 1990s the west coast rock lobster Jasus lalandii underwent an eastward shift in distribution into an area known as East of Cape Hangklip where they had previously been rare. This shift has also been termed an invasion and resulted in a complete change in the benthic community …
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Refinement of Surface Combatant Ship Synthesis Model for Network-Based System Design
… characteristics. Following an Architecture Flow Optimization (AFO), or energy flow analysis based on this framework, vital components are sized based on their energy flow requirements for application in the ship synthesis model (SSM). Previously, components were sized manually or …
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Identification and visualization of electromagnetic coupling paths & nonlinear capacitors for ESD protection
… is to utilize an analogy between electromagnetic energy flow and fluid flow. This allows one to apply the theories and algorithms of fluid dynamics to electromagnetics and thereby to visualize the electromagnetic energy flow. This in turn can be utilized to identify the electromagnetic coupling …
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