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 27 for “"Temperature Threshold"”.
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Low-Cost, Passive UHF RFID Tag Antenna-Based Sensors for Pervasive Sensing Applications
… reader. I demonstrate proof of concept using a temperature threshold sensor - the crossing of a design temperature threshold results in a shift in the sensor's optimal operating frequency. I demonstrate that the sensor works reliably over a 3 m read range and in different environmental …
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Using Covers and Wetting Agents to Prevent Winter Injury of Ultradwarf Bermudagrass
… is risk of sustaining winter injury from low-temperature exposure and tissue desiccation. Protective covers reduce low-temperature exposure on ultradwarf bermudagrass greens. Desiccation of turf can be caused by hydrophobic soils. Wetting agents are applied to actively growing ultradwarf …
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Modeling the Greenland Ice Sheet response to climate change in the past and future
… under certain conditions), and that a temperature threshold exists above which the ice sheet transitions to an essentially ice-free state. The threshold in the global temperature is estimated to be in the range of 1.3-2.3°C above preindustrial conditions, significantly lower than …
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Aspects of the ecology of Scolypopa australis (Walker) (Homoptera:Ricaniidae) and its parasite Centrodora scolypopae (Valentine) (Hymenoptera: Aphelinidae)
… between years and aspects in response to temperatures experienced. It was slower on blackberry than bracken. Time specific life table analysis showed that parasitism by C. scolypopae was the key factor determining fluctuations in the population of S. australis. The next most important …
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Effects of opioid antagonism on thermoregulation during prolonged exercise in the heat
… drug effect was observed on rectal or mean skin temperature during exercise. Post-exercise skin temperature was significantly (P<.001) higher on naloxone versus saline. Forearm blood flow (FBF) was consistently higher from minute 25 of exercise until test termination, although only the minute 25 …
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Freeze-thaw phenomenon as a climatological parameter
… Unlike the elements, there is a definite threshold involved; that is, 32 degrees Fahrenheit or 0 degrees Centigrade. At this threshold water may exist in either the liquid or solid state but by the addition or subtraction of heat it can change from one state to the other without a gain or …
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CHARACTERIZING INTRA-ANNUAL XYLEM CELL FORMATION AND CIRCADIAN CYCLE DYNAMICS OF JACK PINE (PINUS BANKSIANA) IN THE NORTHERN BOREAL FOREST, YELLOWKNIFE, NORTHWEST TERRITORIES
… at the study site “Treeville” occurred once temperatures had exceeded the 4-5ºC temperature threshold, the period of rapid growth was observed around June 21 for all phases of xylogenesis, aligning with the timing of annual longest photoperiod during summer solstice. It is demonstrated that …
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Further exploring the pharmaceutical applications of novel microwave-induced in situ amorphization
… with the systemic molecular mobility and the temperature threshold of amorphization were suggested to have significant impacts on the amorphization rate of IND. The occurrence of the dissolution-mediated in situ amorphization was investigated in depth, providing a better understanding of the …
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Dielectric micro-cavity surface-emitting lasers
… continuous wave, electrical injection at room temperature. Threshold currents from devices with different diameters were collected for further study. The working devices generally had threshold currents around hundreds of µA, while their metal-cavity counterparts had previously-reported …
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Effects of temperature on gular fluttering and evaporative water loss in four sympatric cormorants in southern Africa
… continues to cause rising air and sea surface temperatures and changes in precipitation patterns across the globe. Many seabirds will be challenged by increasing temperatures because they must balance conflicting adaptations for dealing with cold environments when foraging and hot environments …
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Changes in Stormwater Thermal Loads Due to Bioretention Cells
… are extremely susceptible to changes in stream temperatures. Urban development and the increase in impervious surfaces alter the hydrologic cycle in urban watersheds, limiting infiltration and increasing surface runoff. Impervious surfaces absorb and store solar radiation, resulting in higher …
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Exploiting the Productivity of C4 Photosynthesis in Cool Temperate Climates: Mechanisms and Thresholds of Cold Tolerance in Miscanthus, Saccharum, and Spartina pectinata
… tolerant, it shows little tolerance of subzero temperatures with reports of winterkill in some cold climates. Spartina pectinata is a C4 perennial grass native to North America with a distribution up to 61°N latitude. The purpose of this thesis is to compare cold tolerance thresholds across …
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The Evolutionary History and Phylogeny of the Lithodinae (Decapoda: Anomura: Lithodidae)
… The hypothesis that lineage-specific temperature tolerances influence<br/>the distribution of deep- and shallow-water groups was tested by examining habitat<br/>alongside phylogeny.<br/>Lithodid ancestors are likely to have had a north Pacific, shallow-water distribution<br/>and …
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Burnthrough Modeling of Marine Grade Aluminum Alloy Structural Plates Exposed to Fire
… models of aluminum typically rely solely on temperature thresholds and cannot accurately capture either the occurrence or the time to burnthrough. This research experimentally explores the fire induced burnthrough phenomenon of AA6061-T651 plates under multiple sized exposures and introduces …
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Mitigating risk of weather variability to agriculture through improved field workability predictions
… days (FWDs), and are driven by soil moisture and temperature. Over a certain threshold of soil moisture or below a certain temperature threshold, a field is considered unworkable. Working a field that is too wet may lead to soil compaction, and below a certain temperature the soil may be frozen or …
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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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Quench dynamics and fiber optic quench detection of VIPER high temperature superconductor cable
High temperature superconductors (HTS) enable many high field magnet applications—such as magnetic fusion devices—to operate at superior current densities, temperatures, and fields compared to low temperature superconductor (LTS) based magnets. However, HTS introduces new challenges: slow quench …
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Seasonal predictability and interannual variability in coastal planktonic communities
… This thesis examines seasonal predictability, temperature-phenology relationships, and interannual bloom variability in coastal plankton using two decades of high-resolution observations from the Martha’s Vineyard Coastal Observatory (MVCO). Through automated flow cytometry, we analyzed …
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A path to biodiscovery: isolating Antarctic ascidian-associated bacteria and screening genomes for secondary metabolite-encoded biosynthetic gene clusters and signatures of cold adaptation
… believed to hinder protein function at low temperatures were reduced. The predicted Antarctic proteins also followed the established trend of increased glycine and serine content in cold adapted proteins, understood to increase protein dynamics in cold through their small size and reduced …
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Improving The Palmer Drought Severity Index By Incorporating Snow And Frozen Ground
… the form of precipitation is based on an air temperature threshold and moisture has been withheld and redistributed into the system based on the accumulation and melt of snow. With the snow processes included, all the model variables (evapotranspiration, soil moisture recharge/loss, surface …
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