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 20 for “"Threshold temperature"”.
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A Comparison of the Prediction Models for the Impact of Heat Wave on Total Mortality and Incidence of Heat-related Illness in the Republic of Korea
… between incidence of heat-related illness and temperature during heat wave in Korea. This study is to select the most appropriate prediction model for the impact of heat wave on total mortality and incidence of heat-related illness in Korea. Using piecewise regression model, the study was …
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Wildfire impacts on western United States snowpack
… (the melt-rate function and the snowfall threshold temperature). The observed changes from pre- and post-wildfire periods at each SNOTEL site were used to develop a suite of general linear models to adjust the melt-rate function and threshold temperature. The model inputs include readily …
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Redox kinetics study for chemical-looping combustion, water and CO₂ splitting using nickel and cerium-based oxygen carrier
… state-of-the-art. Ceria reduction is slow with a threshold temperature of 700°C. The model reveals that the charge transfer is the rate-determining step for H2 production. Improving H2 splitting requires: (i) reducing the defect formation enthalpy, and (ii) accelerating charge-transfer. The …
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Laboratory rearing, establishment, subterranean survivorship, and thermal requirements of Laricobius spp. (Coleoptera: Derodontidae), biological control agents released for Adelges tsugae (Hemiptera: Adelgidae)
… summer. The rate of development and the minimum threshold temperature for each life stage were determined through constant temperature experiments, and were used in the construction of a phenological forecast model. Laricobius osakensis minimum threshold temperature (3.6°) from egg to adult was …
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Thermal biology and behaviour of two predatory Phytoseiid mites: Amblyseius swirskii (Athias-Henriot) (Acari:Phytoseiidae) and Phytoseiulus longipes (Evans) (Acari:Phytoseiidae)
… of introduced species and investigates temperature related behavioural thresholds for all three species. Laboratory results demonstrate a low level of cold tolerance in A. swirskii and no diapause. Field studies recorded 100% mortality within two weeks of outdoor winter exposure. …
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Effectiveness of active cooling on torque performance for prosthestic applications
… outrunner motor were built to observe the temperature of the windings as constant current was applied to the motor. The addition of a fan-based active cooling system allowed the motor to run at 142% of its maximum continuous current rating for up to 56 seconds before winding temperatures …
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High-speed video observation and on-line measurements of oil aeration in an internal combustion engine
… to operate at 8000rpm and at engine oil temperatures below 110ÌC. Visual observations and quantitative measurements of oil aeration were performed in the oil sump. The oil aeration process was visualized in the oil sump using high-speed video equipment, at engine speeds below 4000rpm. …
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Assessment of high-burnup LWR fuel response to reactivity-initiated accidents
… as simulated RIA tests revealed lower enthalpy threshold for fuel failure associated with fuel dispersal, which may compromise the core coolability and/or cause radiological release should this happened in LWRs. Valuable information on the behavior of high burnup fuel during RIA are provided by …
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Environmental controls in the seasonal succession and synchronization of development in some pond species of damselflies (Odonata: Zygoptera)
… in the coenagrionid species is produced by a temperature and photoperiod influenced diapause in the penultimate and final instars, by differences in thermal growth coefficients in different instars during spring development, and by a threshold temperature for emergence higher than that for …
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The plasticity of diamond
… indenter technique has been extended to high temperatures and applied to study the plasticity of various types of natural and synthetic diamond. Consequently, the effect of temperature on the critical resolved shear stress of synthetic type Ib, and natural type Ia and type IIa has been …
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Catalytic Decomposition of a Perfluorinated Carbon Proxy Using Alumina-based Catalysts
… to the fully calcined α-Al2O3. At elevated temperatures (>400 ℃), the surface hydroxyls are released which creates coordinatively unsaturated sites (CUS) on the surface. The surface of potential catalysts were then analysed to quantify the acid sites on the surface of the catalyst (as …
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The Development of an Accelerated Testing Facility for the Study of Deposits in Land-Based Gas Turbine Engines
… of an actual gas turbine. Flow Mach number, temperature and particulate impingement angle are also matched. Validation tests were conducted to model the ingestion of foreign particulate typically found in the urban environment. The majority of this particulate is ceramic in nature and smaller …
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Identifying genetic variation in candidate genes for heat stress and association thereof with growth performance in dusky kob (Argyrosomus japonicus)
… of heat stress and growth performance. As temperature increases, so does growth, but only up to a point. Once the threshold temperature is reached, growth is hindered following the induction of heat stress. Furthermore, since many genes involved in regulating heat stress are conserved, …
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Low Temperature Induction of Males and Other Developmental Anomalies in a Self-Fertilizing Hermaphroditic Fish Species
… was thermolabile; incubation of embryos at low temperatures (19° C)) produced up to 100% males. It was suggested that this might be part of an environmental sex determination (ESD) system in this species.If the induction of males is indeed part of and ESD in this species, then it may be that the …
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Health impacts of climate change in the older population
… increased by 56% for 1℃ increase over the threshold temperature among the population aged less than 65, by 62% among older men and 74% among older women. This suggests that heatwaves had huge influences on health, especially in the elderly. The older men were more vulnerable to heat waves …
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Self-tuning dynamic voltage scaling techniques for processor design
… for the two main purposes: energy-saving and temperature reduction. However, recently, a Dynamic Voltage Scaled (DVS) processor has lost its appeal as process technology advances due to the increasing Process, Voltage and Temperature (PVT) variations. In order to make a processor tolerant to …
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Laser beam induced current studies of Hg1-xCdxTe photodiodes
… However, this correlation is limited to higher temperatures and large diodes sizes, which avoid photocarrier spreading saturation of the LBIC profile. Temperature dependent studies of LBIC were carried out, which reflect the changing behaviour of junction resistance, R0. At low-temperatures, …
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Implications of climate change on the reproductive success of the Southern Yellow-billed Hornbill, Tockus leucomelas
… habitats where birds already experience air temperatures (Tₐs) close to their upper thermal tolerance. Many desert birds coincide breeding with periods of food availability triggered by rainfall during the summer season. Daily maximum air temperatures (ₘₐₓ) during the Kalahari summer season …
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Effects of Crystallite size and water partial pressure on the activity and selectivity of low temperature iron-based fischer-tropsch catalysts
… co-feed on the activity and selectivity of low temperature Fischer-Tropsch synthesis. In heterogeneous catalysis it is well known that with smaller crystallites, more active surface area is exposed allowing for higher overall activities. However the subject of size sensitivity remains an issue …
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Understanding and minimizing the impacts of host-pathogen-environment interactions in the Pacific oyster Crassostrea gigas
… could be the result of trials being run at a low temperature (14 °C) less than the threshold temperature (16 °C) for replication of the virus. To the best of our knowledge C. maenas is the first non-bivalve species indicating infection of OsHV-1 µvar. (b) investigate the role of crabs, cockles and …