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 53 for “"Extreme Temperature"”.
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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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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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Changes in frequency of extreme temperature and precipitation events in Alaska
Decadal mean temperatures show a warming over the past 60 years at individual stations in Alaska. This research examines corresponding changes in frequencies of extremes of temperature and precipitation based on daily data from 26 Alaskan surface weather observing stations from 1950 to 2008. …
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Device Characterization and Compact Modeling of the SiGe HBT in Extreme Temperature Environments
… The SiGe HBT performs exceptionally at low temperatures. The device DC current gain and AC small-signal gain significantly increase in the cryogenic temperature range. Applications at low temperatures with expansive temperature range specifications need an HBT compact model to accurately …
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Hadronic matter: from vacuum to extreme temperature in the presence of magnetic fields
This work consists of two themes. First, we work with Finite Energy QCD Sum Rules (FESR) approach in the vacuum. We tackle the problem of quark-hadron duality violation (DV), using the vector and axial-vector hadronic spectral function from tau-decay. A pinched integration kernel is introduce in …
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SYNTHESIS OF EFFICIENT PHOTOCATALYSTS IN EXTREME TEMPERATURE CONDITIONS FOR THE DEGRADATION OF AIR POLLUTANTS.
… its unalterable cubic crystal structure at high temperatures. Therefore, STO enables the development of more efficient systems for NOx photocatalytic reduction under LED irradiation and supports high-temperature industrial applications. This work explored various synthesis methods for the …
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Calcium-Silicate-Hydrate in cementitious systems : chemomechanical correlations, extreme temperature behavior, and kinetics and morphology of in-situ formation
… chemomechanical correlations, behavior under extreme temperature and pressures, and kinetics and nanostructure of in-situ formation. Calcium Silicate Hydrate (C-S-H) formed in-situ in concrete is believed to have a layered structure with silicate chains similar to crystal structures of …
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Observed trends in daily extreme temperature indices (percentiles) over the Western and Eastern Cape of South Africa for the period 1960 to 2005
… has investigated changes in the frequency of extreme cold and hot tails in the probability distributions (percentile indices) of minimum and maximum temperature events over the Western Cape and Eastern Cape for the period 1960-2005. The focus was to determine whether the changes in hot and …
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Maxima in strangeness observed in heavy ion collisions using statistical models
… of nuclei in order to probe matter under extreme temperature and energy density. With a resonance gas mode, of hadronic matter, Hagedorn came to the conclusion that on increasing the energy density, hadronic matter could exist above a limiting temperature of appriximately 160 MeV. Above …
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Silicon Germanium BiCMOS Comparator Designed for Use in An Extreme Environment Analog to Digital Converter
… the process of creating a radiation hardened and extreme temperature operating comparator from start to finish in the 90 nm SiGe 9HP process node. This includes the entire design flow from examining comparator topologies, to designing the initial comparator circuits, to simulating the comparator …
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High Temperature CMOS Silicon Carbide Asynchronous Circuit Design
<p>Designing a digital circuit to operate in an extreme temperature range is a challenge with increasing demand for a solution. Large variations in temperature have a distinct impact on electron mobilities causing substantial changes to the threshold voltage of the devices. These physical changes …
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An analysis of MRAM based memory technologies
… can resist high radiation, and can operate in extreme temperature conditions, it is likely that we will see the first MRAM in applications that need such properties.
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Process-Induced Viscoelastic Stress in Composite Laminates
… with cooling the material system from the cure temperature to room temperature. The present research examines the fundamental nature of time-dependent residual-thermal stresses in composite laminates which are caused by the extreme temperature reduction encountered during the fabrication …
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The influence of temperature on parental investiment in Common Fiscal and consequences for nestling growth
… models project a 1.5-4oC increase in the Earth’s temperature by 2100. Africa, especially southern Africa, is expected to experience not only an increase in average temperatures but also an increase in the frequency and duration of extreme temperature events. Increasing temperatures will result in …
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Structure-property relations of nanostructured carbon systems as a function of processing
… CNTs and carbon matrix response to pyrolyzation temperatures has recently been completed and is used to inform and motivate the research reported here. This research will focus primarily on the effects of different temperature ramping rates (TRR's) during pyrolysis of phenolic resin to form the …
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Preparedness through partnership : integrating climate change and public health in the City of Boston
… of the City of Boston's interdepartmental extreme temperature planning process, the research draws lessons, illustrative case studies, and recommendations for strategic planning and coordination to strengthen capacity, improve communication, and mitigate risk. Major themes presented …
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A multi-criteria analysis of adapting the Tiv traditional hut to climate change: a case study of the Kanshio community, Makurdi, Benue State, Nigeria
… vulnerable to climate change, such as extreme temperature, droughts, desertification, flooding and cyclones, they are the most poorly adapted and investigated. The study finds that economic reasons were mostly responsible for the lack of preparedness and adaptation. An additional …
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Biophysical Insights into Lipid Oxidation Effects on Membrane Self-Organization and Enzymatic Catalysis Under Extreme Conditions
… palmitate (pNPP) and glycerol under extreme temperature conditions. Electrospray Ionization Mass Spectrometry (ESI-MS) and spectrophotometric analyses demonstrated the successful formation of high-value products, namely para-nitrophenol (pNP) and glyceryl palmitate, even at elevated …
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Gas lift valve failure mode analysis and the design of a thermally-actuated positive-locking safety valve
… thousands of meters below the ocean floor in extreme temperature and pressure conditions and repair and monitoring become more difficult. Gas lift valves and oil well systems have been modeled but system failure modes are not well understood. In this thesis a quasi-steady-state …
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Synoptic weather systems over Antarctic sea ice: understanding the link between extratropical cyclones and extreme variability in Antarctic sea-ice concentration
… rivers are key drivers in transporting extreme heat and moisture to the poles. Previous studies have shown that extratropical cyclones can promote change in sea-ice concentration at a synoptic scale, however, the extreme variability in synoptic-scale sea-ice concentration and the extent …
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