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 14 of 14 for “"flight distance"”.
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Impacts of Space Launch Operations on Florida East Coast Airspace Users
<p>With an increasing number of space flight operations in the United States, space flight integration into the National Airspace System (NAS) is a pertinent area of research so safe and efficient operations in NextGen airspace can be achieved. The currently implemented procedure for Florida east …
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Optimal Task Scheduling and Flight Planning for Multi-Task Unmanned Aerial Vehicles
… In this thesis, we study the optimal flight planning, control, and routing for the multi-task UAV. The main contributions of this thesis can be summarized as follows. • This thesis presents a novel energy-efficient UAV flight planning framework, which integrates UAVs into intelligent …
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Calibration and validation of honey bee foraging flight duration as an estimate of distance flown
… context. One potential new method of estimating distance flown is by using a bee's flight duration, or the time she spends outside the hive. However, what is not known is how, or how well, durations translate to distance. Here, we test the viability of the new method first with a Calibration …
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Integrating supplemental lift devices to improve performance in high speed multi rotor UAVs
… multi-rotor UAVs. The goal is to improve flight performance across the diverse range of mission profiles these platforms typically encounter. Multi-rotor platforms are traditionally constrained by the need for their propellers to generate both lift and thrust, which limits flight time, …
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Foraging habitat niche comparisons and foraging behavior of seven species of flycatchers in southwest Virginia
… and different foraging tactics (sortie flight distance and methods of insect capture) were also important means of partitioning the food resource. Data were analyzed to test a previously published hypothesis which indicated that the foraging ecology of a smaller flycatcher species was …
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Autumn Foraging and Staging Ecology of Eastern Population Sandhill Cranes (Antigone canadensis tabida)
… use, approximately aligning with mean foraging flight distance (6.4 ± 0.15 km) calculated from GPS tracking data. Adult cranes did not forage more efficiently than juveniles; if anything, juveniles may have foraged more efficiently than adults. Alternatively, the social contexts of foragers …
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Models, optimal performances and sensitivities of commercial flight trajectory in the air traffic system
… for trajectory generation of commercial aircraft flight, examined different choices of performance indices in trajectory generation within Air Traffic Control (ATC) system, and discussed sensitivity concepts to evaluate the qualities of generated optimal trajectories. The trajectory generation is …
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Sensitivity of the ozone layer, climate, and public health to changes in the location of aviation emissions
… aircraft emissions for a full range of possible flight altitudes and latitudes. The current model reports results based on the average of five years of atmospheric impacts. Applying this model to multiple emission scenarios, this thesis explores the variation in environmental impacts across …
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Coordination, Matchmaking, And Resource Allocation For Large-scale Distributed Systems
… statistical models of airport delay and single flight arrival delay were developed. The models use the Airline On-Time Performance Data from the Federal Aviation Administration (FAA) and the Surface Airways Weather Data from the National Climatic Data Center (NCDC). Multivariate regression, …
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The MeerKAT Radio Frequency Interference Environment
… a correlation between the time of the day and flights passing over a region of site. Our results showed that the highest probability of RFI points towards a region including nearby towns. The results obtained are consistent with the argument that the major RFI sources for MeerKAT site are the …
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Mating Success in Low-Density Gypsy Moth Populations
… which may be due in part to increased long-distance dispersal of males and increased longevity of females. The effect of artificial pheromone applied at various doses and formulations on mating success in low-density gypsy moth populations also was studied. Dose-response relationships were …
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Flight characteristics of pen-reared and wild prairie-chickens and an evaluation of a greenhouse to rear prairie-chickens
… populations has met with marginal success. Flight characteristics, predator avoidance behavior, and rearing methods are possible factors contributing to post-release mortality of pen-reared birds. To evaluate flight characteristics and predator avoidance behavior of pen-reared APC's released …
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Past, present, and future climate impacts of aviation
… outpacing growth in annual fuel consumption. Per flight distance, contrail impacts varied less than 10% over this time. However, underlying drivers did not remain constant. The fraction of flight segments that cause contrails increased by 32%, while the radiative forcing per distance of contrail …