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.
Results
Showing 1 to 20 of 23 for “"windspeed"”.
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The UK wind regime - Observational trends and extreme event analysis and modelling
… a unique 40-station network of 10m hourly mean windspeed and daily maximum gustspeed (DMGS) surface station measurements. The regime is assessed, in the context of longer- and larger-scale wind variability, in terms of temporal trends, seasonality, spatial variation, distribution and extremes. …
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Urban Rainfall Interception of Evergreen and Deciduous Trees for the Southeastern United States
… Full factorial analysis including rain depth, windspeed, and leafless period, indicated that all factors were significant in affecting interception. One-way ANOVA tests comparing the four sites found no statistical difference in the deciduous (P=0.11) or evergreen (P=0.28) species, allowed …
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A doubly-fed permanent magnet generator for wind turbines
… constant-frequency electrical output under windspeed variations are undesirable due to complexity, cost, inefficiency or reliability issues. We propose a novel variation of a doubly-fed induction generator which aims to improve power density and simplify construction. Our design is a …
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Ice and the apparent variation of GPS station positions for Alaska
… of 1-10cm. After examining the geography and windspeed at these sites, we conclude that at least three of them will accumulate rime ice during the winter, and that this ice can cause apparent upwards motions of the stations. This hypothesis is supported by seasonal variations in the stations' …
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Transformed-linear models for time series extremes
… the spread of wildfires, we fit models to hourly windspeed data using a preliminary estimation method and find that the fitted transformed-linear models produce better estimates of upper tail quantities than traditional ARMA models or than classical linear regularly-varying models. The innovations …
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A system for predicting burning weather in the south-western Cape mountain catchment areas
… burning is defined in terms of maximum hourly windspeed (< 16 km/hr), maximum daily temperature (18° - 28°C) and minimum daily humidity (15 - 45%). Synoptic conditions which are associated with favourable burning weather are outlined. Burning weather in the study area was found to be associated …
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A system for predicting burning weather in the south-western Cape mountain catchment areas
… burning is defined in terms of maximum hourly windspeed (< 16 km/hr), maximum daily temperature (18° - 28°C) and minimum daily humidity (15 - 45%). Synoptic conditions which are associated with favourable burning weather are outlined. Burning weather in the study area was found to be associated …
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An intensive study of the currents and general hydrology of an anomalous upwelling area off South West Africa
… relationship: Surface current speed = 0,017 x Windspeed. A meandering poleward under-current with an average velocity of 0,07 kts was detected at 30m depth whilst onshore flow of similar average speed existed at 20m. Using the results of the experimental work as a basis, the upper layer of the …
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Temperature and physical modelling studies of open windrow composting
… plots is additionally advised. Increased windspeed (greater than approximately 15MPH) was demonstrated to be a major factor preventing the development and sustaining of thermophilic temperatures within windrows. It is recommended that commercial composters routinely assess windspeed and …
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A low speed wind energy conversion for home system in a developing country : design, technology and policies for rural electrification in Indonesia
… to be harnessed, in countrieswhere the average windspeed is low the technology is less competetive than other source ofenergy.For some developing countries this technology may become appropriate. However,some modifications should be made until it becomes reliable and acceptable for …
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Variation In Bat Activity Across Upland Embedded Wetlands In The Cumberland Ranger District Of The Daniel Boone National Forest
… but was also negatively influenced by windspeed, and survey month across species groups. Occupancy of Myotis ssp. was negatively associated with percent slope of the landscape, while no other habitat variables was significantly associated with occupancy of other species groups. Bat …
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The performance of an integral greenhouse solar air-heater
… the months of January and June. Assuming zero windspeed, a collector efficiency of approximately 42 percent is anticipated for most of the January day and approximately 33 percent for most of the June day.
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Machine Learning Methods for Churn Prediction and Infrastructure Resilience
… critical factors such as precipitation, windspeed, and atmospheric pressure. Additionally, I propose frameworks for quantifying financial impacts of future outages and recommend optimization strategies for proactive infrastructure hardening and emergency response. Collectively, these …
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Evaluating the Capability of ICON-MIGHTI to Detect Plasma Bubbles in the Ionosphere
… in LEO was built to make remote thermospheric windspeed measurements at low latitudes. The MIGHTI team, when reviewing the data, observed variations in day-to-day brightness potentially indicative of plasma bubbles: regions of low-density E-region plasma which rise through the F-region and …
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Transpiration and the water relations of barley
… ground heat flux, temperature, humidity, windspeed, leaf area index and effective soil water potential. Most of these are easily measured or estimated. The model predicts leaf water potential as well as transpiration and is potentially useful in the prediction of water deficits in plants …
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The calculation of cloud parameters from AVHRR data
… Sea-surface state is examined as a function of windspeed. A method of extracting surface temperature in rugged terrain is developed. Dual temperature measurements at 10.8 and 11.8 μm are used to estimate surface air temperature. The transfer of radiation in a single layer cloud is calculated as …
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Water Use of Landscape Trees During Pot-In-Pot Production and During Establishment in the Landscape
… based on tree characteristics, air temperature, windspeed and relative humidity to be an effective predictor of water-use. A complex model was based on a sine-cosine function of day-of-the-year. This model fits water-use data well for each species and production cycle and includes BA, ET and TA. …
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Chemical composition and pH of marine aerosols in the summer-time marine boundary layer of the Atlantic sector of the Southern Ocean
… Using a combination of aerosol concentration, windspeed, and sea ice concentration data, along with air mass back trajectories, it was found that generally, aerosol samples that originated from the open ocean were relatively more acidic compared to those that had air mass back trajectories …
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Irrigation scheduling for Sovereign Coronation grapevine based upon evapotranspiration calculations and crop coefficients /
… vine irrigation needs. Data (relative humidity, windspeed, solar radiation, and temperature) required to precisely calculate evapotranspiration (ETq) were downloaded from the Ontario Weather Network. One of two ETq values (either 100 or 150%) were used in combination with one of two crop …
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