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Showing 1 to 20 of 241 for “"Temperature changes"”.
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Spatial estimation of future temperature changes over Africa
… since time immemorial. However, these long-term changes are very important because of some of the consequences to mankind. Because the changes are small ones in relation to daily experiences, many people find it difficult to perceive and accept these changes. This might cause doubts in the minds …
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Nonlinear Analysis of Plane Frames Subjected to Temperature Changes
… analysis of plane frames subjected to elevated temperatures are presented. The method of analysis is based on a Eulerian (co-rotational) formulation, which was developed initially for static loads, and is extended herein to include geometric and material nonlinearities. Local element …
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Temperature Changes in Thin Films During Growth by Physical Vapor Deposition
Made available in DSpace on 2015-05-12T22:36:05Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7121249.PDF: 3623717 bytes, checksum: defd3f27f23661a57f9e5a0d428ef639 (MD5) Previous issue date: 1971
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Vibration Suppression Using Smart Materials in the Presence of Temperature Changes
… structures are exposed to a wide range of temperatures during normal operation cycles. These fluctuations in temperature may result in significant changes of the structural dynamics. Aircraft, automotive, and satellite structures are also subject to various vibration sources. Passive and …
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Advanced experimental characterization of deformation mechanisms and temperature changes on novel alloys systems
… strength and ductility extending to cryogenic temperatures. This work investigates the high temperature response and elastocaloric effect of SMAs and strain hardening behavior of HEAs using advanced experimental techniques, i.e. digital image correlation (DIC), optical microscopy, electron …
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An Electron Diffraction and Micrographic Study of the High Temperature Changes in the Clay Minerals
Made available in DSpace on 2014-12-09T20:34:28Z (GMT). No. of bitstreams: 1 6801752.pdf: 4891165 bytes, checksum: 2c83bbc02e111b46a45e8b7fc11d8050 (MD5) Previous issue date: 1967
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Temperature changes in paediatric patients undergoing Magnetic Resonance Imaging: A Red Cross War Memorial Children's Hospital experience
… children aged five days to 12 years. Tympanic temperatures were recorded pre- and post- MRI scan. Variables including age, height, weight, head circumference, area scanned, length of time in the scanning room and duration of scan were recorded. The type of anaesthetic management was decided by …
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Using Machine Learning to Classify Danger Levels and Prediction Techniques to Forecast Temperature Changes with Height in Burning Sites
… as soon as possible. Factors such as extreme temperatures, smoke, toxic gases, explosions, and falling objects inhibit their efficiency and risk their safety. These factors could change within a twinkle of an eye. Firefighters must be provided with accurate information and data about the …
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Mesoscale Wind and Temperature Changes over Peatlands of the Hudson Bay Lowlands: impacts on the Surface Energy Balance and Net CO2 Exchange
… respiration to global warming and moisture changes. The Hudson Bay Lowlands (HBL) region of Canada is the second largest peat-accumulating complex in the world that is strongly influenced by the cold air masses originating off the Hudson Bay. Recent warming has caused observed changes in the …
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Transient intra- and extra-cellular thermometry as probes of thermogenesis
Temperature is a fundamental thermodynamic property affecting every biochemical reaction in cellular milieu. Thermometry in tissues has proven useful in understanding thermoregulatory neuronal circuits and cancer metabolism. In contrast, intracellular temperature changes are relatively less …
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A study of the reactivity effects of the V. P. I. nuclear reactor
… at any time is zero. The major contributions to changes of reactivity in the V.P.I. Argonaut reactor are: 1) Fuel and coolant temperature changes 2) Graphite temperature changes 3) Xenon poisoning The control rods have to be continuously positioned so that the total reactivity change of these …
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An investigation of temperature effects on denitrifying bacterial populations in a biological nutrient removal (BNR) system
… this research was to characterize the effects of temperature changes on the denitrification process in a biological nutrient removal (BNR) system. Specifically, there were three objectives. First, the effects of temperature changes on denitrification rates by a bacterial population from a BNR …
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Global heat balance without and with solar radiation management
… against historical estimates of global average temperature. Additional influences are variability of solar irradiance and the initial global average temperature at the end of pre-industrial period. Industrial activities perturbs the concentration of CO2, CH4, N2O, tropospheric ozone, other …
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Multi-Scale Thermo-Hydro-Mechanical Behavior of Saturated Earth Materials
… such as geothermal piles, subject soils to temperature changes. Recorded temperature variations around thermo-active infrastructure and within the active layer of the permafrost reveal the cyclic and transient nature of these temperature changes. Previous studies on the thermo-mechanical …
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Effects of temperature on wheat-pathogen interactions
… defence is not. Many wheat resistance genes are temperature sensitive and these were used as a starting point to investigate defence temperature sensitivity in wheat starting with yellow rust resistance gene Yr36, previously shown to be temperature-sensitive. The effect of temperature on …
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Thermo-Mechanical Behavior of Energy Piles: Full-Scale Field Testing and Numerical Modeling
… their thermo-mechanical behavior. The change in temperature along energy piles, resulting from their employment in heat exchange operations, causes axial displacements, thermally induced axial stresses and changes in mobilized shaft resistance which may have possible effects on their behavior. In …
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Dynamic Chemical Shift Imaging For Image-Guided Thermal Therapy
Magnetic resonance temperature imaging (MRTI) is recognized as a noninvasive means to provide temperature imaging for guidance in thermal therapies. The most common method of estimating temperature changes in the body using MR is by measuring the water proton resonant frequency (PRF) shift. …
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Characterization and Efficacy of Cobalt Compounds as in Vivo Magnetic Resonance Temperature Probes
… that $\sp{59}$Co NMR can be used to determine temperature changes in vivo. The liposome encapsulated $\rm \lbrack Co(en)\sb3\rbrack Cl\sb3$ and Co(Hp) (Im) $\sb2\sp+$ show promise as in vivo MR temperature probes. The relatively high accumulation of Co(Hp) (Im) $\sb2\sp+$ in tumors indicates …
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Aspects of the community structure and reproductive ecology of the common sea-urchin Parechinus angulosus Leske around the Cape Peninsula, South Africa
… are therefore adapted to a fairly wide range of temperatures. Maximum fluctuations probably occur along the stretches of coastline affected by upwelling, the south-west and west coasts, with differentials of twelve degrees Centigrade and more. Furthermore, these fluctuations may take place within …
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