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 19 of 19 for “"Weather impacts"”.
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Weather Impacts on Traffic Parameters and Signal Timing Performance
… of three studies carried out to explore weather impacts on traffic parameters. The first part investigates light rainfall’s impact on uncongested speed during the daytime on a two lane state highway with a detailed statistical analysis and spatially compatible rainfall and speed data. The …
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A Study of Inclement Weather Impacts on Freeway Free-Flow Speed
… attempts to quantify the impact of inclement weather (precipitation and visibility) on traffic stream free-flow speeds along freeway sections. The analysis is conducted using weather (precipitation and visibility) and loop detector data (speed) obtained from Baltimore, Minneapolis/St. Paul, …
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Prediction of terminal-area weather penetration based on operational factors
… to capacity. This is especially true during weather events. However, the degree to which weather impacts airspace capacity, particularly within the terminal region, is not well understood. Understanding how weather impacts terminal area capacity will be important for quantifying the …
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Dynamic prediction of terminal-area severe convective weather penetration
… to a recent report by the FAA's Aviation Weather Research Program, over 23% of these accidents are weather-related, typically taking place during the takeoff and landing phases. When pilots fly through severe convective weather, regardless of whether or not an accident occurs, they cause …
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Testing the Re-designed SuperDARN HF Radar and Modeling of a Twin Terminated Folded Dipole Array
… plasma irregularities to study space weather manifested in the Earth's magnetosphere and ionosphere. Space weather impacts many technological systems including Global Positioning System (GPS), spacecraft orbits, power distribution, surveillance radar, HF communications and transpolar …
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Ray Tracing Analysis for the mid-latitude SuperDARN HF radar at Blackstone incorporating the IRI-2007 model
… ionosphere and to study the near- Earth space weather. Space weather impacts many technological systems including HF communications, Global Positioning System (GPS), and surveillance radars. Variations in the pattern of the backscatter from the ground ("ground scatter") observed by the …
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Essays on the Economics of Climate Change and Geoengineering
… methods for the measurement of climate change impacts on macroeconomic outcomes and the role of solar geoengineering in reducing these impacts. Solar geoengineering is different from traditional mitigation in at least three ways; it is inexpensive, quick, and imperfect. These characteristics …
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Weather effect considerations in reliability evaluation of electrical transmission and distribution systems
The weather environment has a significant impact on the reliability of a power system due to its effect on the system failure mechanisms of overhead circuits and on the operational ability of an electric power utility. The physical stresses created by weather increase the failure rates of …
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Three essays on biofuel, weather and corn yield
… its impact on biofuel and corn prices, and the impacts of weather and soil moisture on corn yield in the Midwest. Chapter 2 illustrates the hierarchical competition of U.S. corn ethanol, Brazilian sugarcane ethanol and biodiesel to meet the RFS mandates and explained the evidenced two-way trade …
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A Gap Analysis of Meteorological Requirements for Commercial Space Operators
… to failures in understanding the significance of weather impacts on operations. Using lessons from the aviation industry, the commercial space industry can preempt such accidents and maintain viability as an industry. Using <em>Lanicci's Strategic Planning Model</em> , this study identified the …
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Ion Temperatures in Earth's Inner Magnetosphere: Ring Current Dynamics, Transient Effects, and Data-Model Comparisons
… active periods, and also understanding the space weather impacts of hot ion populations injected during such periods. Dynamic, spatiotemporally resolved ion temperature boundary conditions have been implemented into the Comprehensive Ring Current Model (CRCM); the temperatures are based on 2-D …
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Truck Activity Pattern Classification Using Anonymous Mobile Sensor Data
… to capture truck rerouting behaviors due to weather events. The ability to model re-routing behaviors allows transportation agencies to identify operational and planning solutions that mitigate the impacts of weather on truck traffic. For freight industries, the prediction of weather impacts …
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Variable weather and implications for herbicide efficacy and yield loss due to weeds
… to worsen throughout the 21st century. Variable weather impacts crops, weeds, and their management; however, empirical study of these phenomena has been piecemeal and limited to a handful of site years (e.g. generally 2 to 4). This research was developed to shed light on how future climate …
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Fusarium stalk rot incidence in maize, Zea mays L., in relation to the European corn borer, Ostrinia nubilalis (Hubner) infestation, genotype maturity and eastern Ontario climatic gradient.
… However, it has been shown that seasonal weather impacts concurrently on maize development, corn borer and Fusarium phenology. It was hypothesized that some of the maize resistance to both pests depended directly on climatological conditions. In the United States, genotype selection for …
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GNSS-based Hardware-in-the-loop Simulation of Spacecraft Formation Flight: An Incubator for Future Multi-scale Ionospheric Space Weather Studies
… observations of multi-scale ionospheric space weather. A number of hardware-in-the-loop (HIL) SFF simulation testbeds based on Global-Navigation-Satellite-Systems (GNSS) have been developed to support GNSS-based SFF mission design, however, none of these testbeds has been directly applied to …
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Development and estimation of traffic data-based operational measures for effective winter snow management
… and those measures cannot fully reflect the road weather conditions when traffic is congested.Developing the operational measures that can objectively and accurately reflect the time-variant road weather conditions is essential in improving the effectiveness of the snow management strategies. In …
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Responses to airport delays : a system study of Newark International Airport
… 85% of delays at Newark are caused by adverse weather impacting the airport. Because of limited capacity and a very full schedule operated at the airport, when adverse weather impacts the airport departure operations are severely delayed. Despite this, unlike the national average, delays at …
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Data-Driven Detection of En-route Convective Weather Avoidance and Development of a Weather Assessment Model
Convective weather has significant impacts on aviation operations around the world. It reduces available airspace capacity, and avoidance of hazardous convective systems increases the workload for both pilots and air traffic controllers. Optimizing airspace use in the presence of constantly …
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ECOLOGY AND MANAGEMENT OF WHITE-TAILED DEER IN AN AGRICULTURAL LANDSCAPE: ANALYSES OF HUNTER EFFICIENCY, SURVEY METHODS, AND ECOLOGY
… were to: 1) examine the potential effects of weather and row-crop harvest on daily harvest of white-tailed deer by archery, and individual hunter variables (e.g., age, weapon preference, preference of hunting method) on individual hunter efficiency and success in 2 regions of Illinois (i.e., …