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 “"Avian flight"”.
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Locomotor Ontogeny and the Evolution of Avian Flight
… limbs for terrestrial locomotion and one set for flight presumably facilitates navigation of aerial environments without compromising terrestrial locomotion, and vice versa. Therefore understanding modularity may be key to understanding bird locomotion, and some of the most striking architectural …
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Locomotor Ontogeny and the Evolution of Avian Flight
… limbs for terrestrial locomotion and one set for flight presumably facilitates navigation of aerial environments without compromising terrestrial locomotion, and vice versa. Therefore understanding modularity may be key to understanding bird locomotion, and some of the most striking architectural …
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The Rise of Modern Avian Flight: Wing Movement and Joint Mobility Within Ornithurae
How and when avian powered flight arose has intrigued scientists for well over a century. Birds have a remarkable fossil record demonstrating their macroevolutionary transition from dinosaurs to birds during the Mesozoic Era. Thus, Mesozoic fossils offer us a unique opportunity to study the …
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The allometry of bird flight performance
<p>Avian flight performance decreases with body size in birds, but previous work has been unable to define the underlying mechanism. Wingbeat frequency is hypothesized to ultimately constrain flight performance via muscular mechanical power output because frequency decreases with body size. I …
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The allometry of bird flight performance
<p>Avian flight performance decreases with body size in birds, but previous work has been unable to define the underlying mechanism. Wingbeat frequency is hypothesized to ultimately constrain flight performance via muscular mechanical power output because frequency decreases with body size. I …
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Dual Mode Macro Fiber Composite-Actuated Morphing Tip Feathers for Controlling Small Unmanned Aircraft
The transition of flight from manned to unmanned systems has led to new research and applications of technology within the field that, until recently, were previously thought to be unfeasible. The industry has become interested in alternative control surfaces and uses for smart materials. A Macro …
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Landscape + Sky: land use analysis at the scale of flight
… efforts. From the scale and perspective of avian flight, and through my experience as a pilot, I demonstrate how the sequence of flight can create a model for understanding the relationship between land use and ecological habitat by using the flight scale of birds and aircraft. With …
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Modeling and Control of Flapping Wing Robots
… wing vehicles whose design is inspired by avian flight. The flapping wing system is examined in the cases where the core body is fixed or free in the ground frame. When the core body is fixed, the Denavit Hartenberg representation is used for the kinematic variables. An alternative approach …
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A 3-Dimensional Evaluation of Wing Movement in Ground Birds During Flap-Running and Level Flight: An Otogenetic Study
… in ground birds during flap-running and Level Flight: an ontogenetic study Chair: Dr. Kenneth P. Dial The science of animal flight requires the quantification of wing movement over a range of behaviors. Despite numerous studies of avian locomotion, we are only beginning to grasp the intricacies …
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A 3-Dimensional Evaluation of Wing Movement in Ground Birds During Flap-Running and Level Flight: An Otogenetic Study
… in ground birds during flap-running and Level Flight: an ontogenetic study Chair: Dr. Kenneth P. Dial The science of animal flight requires the quantification of wing movement over a range of behaviors. Despite numerous studies of avian locomotion, we are only beginning to grasp the intricacies …
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Oviraptorosauria: Morphology, Phylogeny, and Endocranial Evolution
… living vertebrates, including the origin of flight. The current list of shared similarities between oviraptorosaurs and modern birds includes such striking features as loss of teeth, extreme pneumatization and ornamentation of the skull, an unusual sliding jaw articulation, reduction of the …
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An experimental study of a leading-edge alula-inspired device (LEAD) for moderate aspect ratio wings at low Reynolds numbers
… adapting their wings and feather shapes during flight. Equipped with a set of small feathers, known as Alula, located near the leading edge and covering 5% to 20% of the span, bird wings can sustain the lift necessary to fly at low velocities and high angles of attack. The proposed …
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Design and aerodynamic analysis of an airfoil with a bioinspired leading edge device for stall mitigation at low Reynolds number operation
Robust and predictable aerodynamic performance of unmanned aerial vehicles at the limits of their design envelope is critical for safety and mission adaptability. Deployable aerodynamic surfaces, such as flaps or slats, from the wing leading or trailing edges are often used to extend the …