Global ETD Search
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Showing 1 to 20 of 23 for “"base temperature"”.
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Extended Surface Heat Transfer Coefficients via Endwall Temperature Measurements
… post processing complexity. The method is based on a unique, analytical solution of the longitudinal conduction equation with internal heat generation, allowing computation of heat transfer rates via pin base temperature measurements via Temperature Sensitive Paint, or similar non-intrusive …
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Respuesta germinativa y tolerancia al estrés salino en comunidades dunares
… of the Gulf of Valencia, in front of a sweep of temperatures and saline concentrations. The following hypothesis is based on the following work: the germinative response is a determining factor in the distribution of plant species in the dune ecosystems. In the study the results were analyzed …
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A Hydrothermal After-ripening Time Model of Seed Dormancy Loss in Bromus tectorum
… is associated with a decrease in the mean base water potential, one of the parameters of hydrothermal time. The rate of change of the mean base water potential is assumed to be a linear function of temperature above a specific base temperature and as a result can be described by a thermal …
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Flowering Time Response of Diverse Lentil (Lens Culinaris Medik.) Germplasm Grown in Multiple Environments
… adaptation of genotypes. Studies revealed that temperature and photoperiod are major environmental factors defining DTF. This research was conducted with the objective of understanding the variation of DTF governed mainly by temperature and photoperiod and their interactions and identifying …
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Epidemiology and molecular characterization of human and canine hookworm
… in Brazil, two risk models were developed based on the Growing Degree Day-Water Budget (GDD-WB) concept, one based on accumulation of monthly temperatures above a base temperature of 15oC and threshold WB value >0.4. The second was based on a ‘gradient index’ of the product of monthly …
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Ecology and niche characterization of the invasive ornamental grass Miscanthus sinensis
… drought tolerance. Finally, we investigated the temperature and moisture requirements of M. sinensis seeds and determined a base temperature of approximately 8"C, as well as variable moisture and time to germination requirements between varieties and seed sources. These basic ecological studies …
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Investigation of In Season Progression of Tomato spotted wilt virus and its Management in Flue-cured Tobacco Fields of North Carolina
… degree-days were calculated with four different bases, and a base temperature of 10°C, corresponding to thrips development, resulted in the best fitted model. TSW spatial distribution was investigated in 8 locations using universal kriging interpolations on TSW incidence at 5 and 9 weeks post …
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Analysis and modelling of the dislocation response during non-isothermal creep in Ni-SX superalloys
Nickel-based single-crystal superalloys are commonly used as the material of choice for turbine blades in modern aircrafts. The temperatures and stresses in the turbine are subject to continuous change during in-flight operation. The deformation rates of the turbine blades during operation are …
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The influence of sowing depth, compaction and fertiliser placement on caucasian, subterranean and white clover grown in pots : A dissertation submitted in partial fulfilment of the requirements for the degree of Bachelor of Agricultural Science with Honours at Lincoln University, New Zealand
… in the 1082⁰C thermal time accumulation (base temperature 4.2⁰C for germination and 1⁰C for subsequent growth) for the experiment. This high phyllochron, or slow rate of leaf appearance in the Caucasian clover may be due to another limiting factor, possibly nutrient deficiency. A …
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Soil Carbon Dioxide Efflux in a Naturally Regenerated and a Planted Clear-Cut on the Virginia Piedmont
… time domain reflectometry (TDR) and soil-surface temperature was recorded in the top 7cm, using a temperature probe. For the October measurement a 12cm depth soil core (7cm diameter) was collected for each location. Carbon, nitrogen, coarse fragments, roots, surface litter and coarse woody debris …
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"The New Chemistry" - Sustainable Catalysis with Alcohols
… formed, which is more stable than catalyst 1. Based on this finding eight new anionic P,N-ligands and the resulting iridium complexes were synthesized. After optimization of the reaction conditions (solvent, base, temperature and catalyst loading) these catalysts were used in BH (borrowing …
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Seed dormancy and germination niches of Mediterranean species along an altitudinal gradient in Sardinia
… failure of seedling emergence / establishment is temperature stress; consequently, seed germination should be triggered by favourable temperature conditions for the further development of the seedling. Therefore, temperature is the primary environmental factor regulating germination, and it is …
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Germination niche of Sardinian endemic species in mountain riparian deciduous forests
… and close to the canopy of such riparian woods. Temperature is considered one of the major environmental factor governing seed germination in moist soil and, also is responsible for changes in dormancy states of seeds. Seed dormancy prevents germination in a specified period of time, under any …
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Cooling an electron gas using quantum dot based electronic refrigeration
… wires and quantum dots. Conventionally, low temperature measurements of 2DEGs are made by cooling the sample to 1.5 K with liquid Helium-4, to 300 mK with liquid Helium-3, or even down to a few mK using a dilution refrigerator. However, at lower temperatures the electron gas becomes …
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DEVICE DEVELOPMENT AND CHARACTERIZATION FOR SOLID-STATE QUANTUM COMPUTATION
… quantum information between different bases, which requires mutually compatible devices and materials. In this thesis, I report on the device development and characterization for solving issues and improving performance in two solid-state quantum computing fields -- superconducting and …
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The response of field bean (Vicia faba L.) to irrigation and sowing date
… The rate of crop development was strongly temperature and to a lesser extent photoperiod. After time of about 2000 degree C d above a base temperature must be accumulated for a crop to reach maturity. Calculation of photothermal time above a base photoperiod of 6 hours enabled the maturity …
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Using Thermal Units to Predict Biomass Accumulation and Total Nitrogen Uptake for Cover Crops in Arkansas
… methods, but all use species-specific cardinal temperatures. There are very basic equations to determine DTU accumulation that only account for the average daily temperature and the species base temperature. There are also very complex and more realistic equations that account for the other …
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Quantum transport in magnetic topological insulators
… plots of longitudinal resistance versus temperature is $\sim$ 4 \textmu eV (i.e. $\sim$ 47 mK). Such a small energy scale implies that the Fermi level is far away from the centre of the magnetic gap and the bulk conduction may dominate the transport. Thermal effects arising from the …
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High-Resolution Modelling of Surface-Atmosphere Interactions and Convection Development at Nam Co Lake, Tibetan Plateau
… has been modified with an extrapolated surface temperature, to be used for the calculation of turbulent fluxes. A quadratic temperature profile based on the layer mean and surface model base temperature is assumed in each layer and extended to the surface. Compared to eddy-covariance …
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River temperature behaviour in changing environments: trends, patterns at different spatial and temporal scales and role as a stressor
River/stream water temperature is one of the master water quality parameters as it controls several key iogeochemical, physical and ecological processes and river ecosystem functioning. Thermal regimes of several rivers have been substantially altered by climate change and other anthropogenic …
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