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 95 for “"Extreme temperatures"”.
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Tailoring Electrolytes for Extreme Temperatures in Rechargeable Aluminum and Lithium-Ion Batteries
… are typically limited to operating near ambient temperatures (typically, < 50 °C), restricting their use in extreme environments such as deep subsurface exploration or space missions, where temperatures can exceed 100 °C. At elevated temperatures, LIB performance and safety deteriorate due to …
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Elastic properties and fracture behavior of graphite/polyimide composites at extreme temperatures
The influence of elevated and cryogenic temperatures on the elastic moduli and fracture strengths of several Celion-6000/PMR-15 laminates was measured. Tests were run at -157,24 (room temperature), and 316°C (-250, 75, and 600°F). Both unnotched and notched laminates were tested. Several failure …
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FAILURE MECHANISMS OF ULTRA HIGH MOLAR MASS POLYETHYLENE SINGLE FIBERS AT EXTREME TEMPERATURES AND STRAIN-RATES
… single fibers was investigated at eleven temperatures from room temperature (20 °C) to the orthorhombic-hexagonal phase transition (148 °C) and at six strain-rates from quasi-static (10-3 s-1) to dynamic (103 s-1). Dimensional analysis of ballistic limit tests using has shown an …
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Taking it to the extremes: understanding the role of assets in older people’s vulnerability, resilience and adaptation to extreme temperatures
… emerging risks and impacts of climate change and extreme weather are an increasingly important threat to human health. This poses many challenges and opportunities for individuals and wider society on how to adapt. In response to the presently limited understanding of what shapes human adaptation …
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Investigating Lipase Stability in Hydrophobic Solvent at Extreme Temperatures: A Molecular Dynamics Study of Candida Antarctica Lipase B in Polydimethylsiloxane
… and PDMS were then performed at multiple temperatures. Simulation results revealed that CALB did not experience thermal denaturation in PDMS at extreme temperatures and structural analysis showed that CALB became more rigid and compact in PDMS compared to the other solvents. The results …
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Economic costs of extreme heat on groundnut production in the Senegal Groundnut Basin
… affected by climate change and associated rising temperatures. This study investigates long-term changes in the frequency of extreme temperatures in the Groundnut Basin and the impact of extreme temperatures on groundnut production. The current economic costs of extreme temperatures on groundnut …
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Effect of Extreme Temperature on Stroke Incidence and Mortality in General
… studies have emphasized the growing impact of extreme temperatures, both heatwaves and cold spells on stroke incidence and mortality, a concern heightened by climate change. This systematic literature review investigates the relationship between extreme temperatures and stroke outcomes at a …
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Ultra-low Voltage Digital Circuits and Extreme Temperature Electronics Design
… require digital electronics to operate under extreme conditions e.g., large swings in ambient temperature, very low supply voltage, high radiation. Such applications include sensor networks, wearable electronics, unmanned aerial vehicles, spacecraft, and energyharvesting systems. This …
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NMR Investigations of Structure in Pressure and Cold Denatured Proteins
Because of the extreme temperatures and pressures used to perform the cold denaturation studies, hydrogen exchange rates in model amides were measured at various temperatures and pressures to determine the effect of the extreme conditions. These reaction rates are compared to those obtained by …
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Catchment Scale Downscaling of Hydroclimatic Variables from General Circulation Model Outputs
… influences events such as droughts, floods, extreme temperatures and sea level changes and hence affects the global food production, energy generation, and water resources adversely. Rising greenhouse gas (GHG) concentrations in the atmosphere are considered the dominant cause of climate …
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Improving the thermal shock resistance of zirconium diboride ceramics
… to maintain structural integrity despite the extreme temperatures and heating rates associated with these applications. The fundamental hypothesis of this Ph.D. study is to determine if the introduction of a ZrB₂-based ceramic into a functionally engineered fibrous monolith composite improves …
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Breeding broccoli resilient to multi-abiotic stresses using genome editing
… abiotic stresses including drought, salt, extreme temperatures, strong UV radiation, and darkness phenotypically and physiologically. The research provides a novel strategy for breeding broccoli germplasm resilient to climate change.
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Study of residual stress in a thin platinum layer by means of nondestructive x-ray diffraction
… Since such thermometers are usually exposed to extreme temperatures, residual stress is building up at the Pt-Ah03 interface and can possibly damage the layer. Therefore, the stress in the layer is measured by means of non-destructive x-ray diffraction and evaluated by the frequently used …
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Applications of Forest-Based Machine Learning Methods in Environmental Economics
… hotspots where households face both extreme temperatures and high energy burdens. Together, the papers show how flexible forest algorithms can either isolate causal effects in stated‑preference studies or deliver precise forecasts in energy‑expenditure modeling, thereby deepening our …
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Acoustical behavior of a turbulent, ducted, premixed, hydrogen- flame burner
… temperature probes isolate the microphones from extreme temperatures within the duct while only slightly distorting the results. The real part of the terminating impedance agrees with a correlation in the literature for hot flow leaving a duct.
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Ionizing radiation effects spectroscopy
… such as exposure to ionizing radiation and extreme temperatures can result in performance degradation, transient anomalies, and hard failures. These issues have become evident in recent years with the increasing interest in the use of commercial-off-the-shelf (COTS) electronics in space …
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Air Pollution, Temperature and Cognitive Performance in the Short Run: Evidence from Women’s Ability to Recall Dates
… and potentially correlated to air pollution and extreme temperatures. We study the effects of daily ambient air pollution and monthly temperature on women’s ability of recalling dates across 42 developing countries from 1997 to 2009. We use an estimated natural air pollution data, and calculate …
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Experimental investigation of building envelope and air source heat pumps in Canadian cold climate
… in cold climates. This study investigates how extreme temperatures, wind, and solar conditions affect building envelope performance and the efficiency of commercial ASHPs. Experiments were conducted in controlled conditions using the full-scale climatic chamber and wind tunnel at Ontario Tech …
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Effect of moisture and temperature on the mechanical properties of concrete
… of concrete during the curing process at extreme temperatures experienced in the developed world, but little on concrete that is already cured in the temperature range of -4 °F and 122 °F. There has also been some research of cured concrete at very high temperatures to simulate the …
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