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 79 for “"BUM"”.
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"""I Was a Bum Once Myself"": Harry Partch, ""U.S. Highball"", and the Dust Bowl in the American Imagination"
This study casts the young Harry Partch as a composer primed to tap into the nation's fascination with the Dust Bowl and migrant life. After a brief survey of the few works that currently constitute Partch scholarship, this dissertation contextualizes the search for an American voice in musical …
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The burned child : scarred for life? : a study of the long-term psychosocial adjustment of paediatric burn survivors
Paediatric bum injury is a significant social problem in South Africa. Despite the magnitude of the problem and its potentially devastating physical, psychological and social consequences, the plight of bum-injured children in the local context is an unrecognized one, and has thus escaped empirical …
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Can the season of burning affect the growth of Dichrostachys cinerea populations: A hypothesis of phenology
… the initial spring flush and therefore post-bum re-growth would be stunted. Initial slow re-growth would affect the time taken to reach maturity and the size of the plant in the next bum, thus indirectly affecting both fertility and mortality. The hypothesis was tested by collecting data …
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Ignition and combustion behaviors of nano-composite energetic materials
… in two stages: first, the ignition time and bum rates for three nano-regime Al mixtures were studied over a varied composition range, the results were then used to further study ignition time and bum rate as a function of Al particle diameter, which ranged from 17.4 nm to 20 µm at the optimum …
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Theoretical and Numerical Studies of Frequency Up-shifted Ionospheric Stimulated Radiation
… the SEE spectrum is the broad upshifted maximum (BUM). In this study, the instability processes thought to be responsible to the BUM spectra in the SEE experiments are discussed and analyzed using theoretical and electrostatic particle-in-cell (PIC) models. From characteristics of this feature, a …
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Analysis of the MIT research reactor fission product and actinide radioactivity inventories
… inventory that increases with bum-up, and comprises 41 actinide isotopes and 596 fission product isotopes. The analysis uses the ORIGEN2 depletion code to calculate the activity of actinide and fission product isotopes for eight MITR input models at 32 intervals over a period of …
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Numerical simulation of stimulated electromagnetic emissions in the ionosphere
… maximum (UM) and broad upshifted maximum (BUM), are suggested to be generated at the upper hybrid layer. We observed these three features which have many similarities in the simulation. It is evident that the DM and UM are generated by the same parametric instability involving lower hybrid …
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Fire effects on small mammals and vegetation of the Northern Chihuahuan Desert
… ignited during 13-15 June 1995 on 10 pairs (10 bumed. 10 unbumed) of 25- ha study sites. The 1995 bums reduced shmb (P = '» 006) and grass (P < 0.000) canopy cover to 64 and 16% of the preburn cover, respectively Complete recovery' of the canopy cover had not taken place 1 year post bum …
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Supply chain & organizational behavior through the three lenses : a case study
… programming socket market) by the semiconductor bum-in socket business unit of ACME Inc. The new market entry is done such that the solutions currently provided in the bum-in market are made to operate in a larger solution space with minimal changes to the product/solution to help maximize …
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Two-dimensional reflectivity polarization elastometry imaging techniques (PIET) of soft tissue
… In-vitro pigskins were also used for the tissue bum experiments and its measured reflectivity slope versus stretch increases with the bum duration up to a limited thermal excitation. Above this limit, the in-vitro sample becomes optically transparent, as its biomechanical properties is thermally …
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Long-term effects of fire on nitrogen cycling in a broad-leaf savanna, Kruger National Park, South Africa
… of a fire experiment in 1954. The Experimental Bum Plot (EBP) experiment was initiated in four representative landscapes of the KNP to determine the effects of fire on vegetation structure. I tested the effect of burning on nitrogen cycling and productivity in four fire treatments situated in …
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Development and modeling of a dual-frequency microwave burn rate measurement system for solid rocket propellant
A dual-frequency microwave bum rate measurement system for solid rocket motors has been developed and is described. The system operates in the X-band (8.2-12.4 Ghz) and uses two independent frequencies operating simultaneously to measure the instantaneous bum rate in a solid rocket motor. Modeling …
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Optimization of actinide transmutation in innovative lead-cooled fast reactors
… that fast fertile-free critical reactors that bum plutonium and MAs applied to both one-tier and two-tier fuel cycles with fuel reprocessing have the potential to be more economical than other dedicated systems like the ATW. Hence the thesis studies two lead-cooled critical reactors that employ …
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Novel metal oxide nanocomposites for oxygen storage, sulfur dioxide adsorption and hydrogen sulfide absorption
… have investigated alternatives such as lean-bum engines and fuel cells. This work is focused on the synthesis, characterization and testing of novel metal oxide nanocomposites to facilitate the utilization of these technologies. In lean-bum engines, the use of adsorbents to remove NOx faces …
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Haze measurements through image analysis
… has been affected by haze caused by slash-and-bum fires in Indonesia. Currently, haze concentration is measured by filtering air samples at various stations in Singapore. In this thesis, optical approaches to haze measurements are explored. Images of haze were taken in fifteen minute intervals …
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Estimating the environmental benefits of aviation fuel and emissions reductions
… measures that result in changes in aviation fuel bum levels. For estimating air quality and climate impacts, it is important to employ a multi-gas approach that accounts for the effects of all emitted species, not just carbon dioxide (CO₂). The main objective of this thesis is to develop a …
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Modeling and managing separation for noise abatement arrival procedures
… these procedures can be employed to reduce fuel bum, emissions, and flight time. However, because of aircraft trajectory variations due to operational uncertainties, it is difficult for air traffic controllers to predict and maintain separation between aircraft. Thus, without proper decision …
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Study of low-temperature-combustion diesel engines as an on-board reformer for intermediate temperature Solid Oxide Fuel Cell vehicles
… (LTC) technology diesel engine using will bum fuel-rich mixture to provide the high temperature combustion products necessary for SOFC. This study models the ignition properties of the fuel-rich mixture, and then applies the model to estimate operation map of a LTC diesel engine. This …
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Improving the heat, fire, and melt resistance of elastomeric seals on military gas masks
… mask on and gets hit by an IED, facial and eye bum injuries are very possible. New material must be found that can help prevent these injuries, particularly concerning the seal. The goal is to find the best combination of a suitable elastomer, curing agent, and filler that can give the soldier …
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Multiphase models of slag layer built-up in solid fuel gasification and combustion
… by the slag layer while they continue to bum at a different rate. To take this into account, a wall burning submodel is proposed to predict a correction factor for both solid and porous char combustion models.
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