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 “"hummingbird"”.
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The Hummingbird Bargain
<p>This manuscript is a collection of poems written or revised during the two years of the inaugural Dominican University of California Master of Fine Arts program in creative writing. The poems are mostly free verse with a few formal or hybrid forms and represent my quest to combine narrative with …
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The Reproductive Biologies of Some Hummingbird-Pollinated Plants
… plant species pollinated by the Ruby-throated Hummingbird (or rubythroat, Archilochus colubris, Trochilidae).
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Hummingbird Hovering Energetics and Flight Capacities Across Elevational Gradients
… associated with life at high elevations. Using hummingbirds, a group of animals with high hovering metabolic rates and wide elevational distributions, I examine the flight capacities and aerobic scopes across an 1800-m elevational gradient, as well as any morphological adaptations that permit …
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Hummingbird oil she breast: Testimony and Resistance in Vincentian Redemption Songs
Negro Slavery Described by a Negro: Being the Narrative of Ashton Warner (1831), Shake Keanes The Angel Horn (2005) and H. Nigel Thomass Spirits in the Dark (1993) witness to the communities and individuals who have resisted colonialism in St. Vincent. Frantz Fanon and Stuart Hall shape the …
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Study of the microstructure and mechanical properties of hummingbird wing-bones
… mechanical properties of wing bones of an Anna's hummingbird (Calypte Anna) and a tree swallow (Tachycineta bicolor) was conducted to determine whether the hummingbird bones exhibited unique features due to the high wing loading of the bird. It was hypothesized that the hummingbird's ability to …
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DESIGN AND CONTROL OF A HUMMINGBIRD-SIZE FLAPPING WING MICRO AERIAL VEHICLE
Flying animals with flapping wings may best exemplify the astonishing ability of natural selection on design optimization. They evince extraordinary prowess to control their flight, while demonstrating rich repertoire of agile maneuvers. They remain surprisingly stable during hover and can make …
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Towards MAV Autonomous Flight: A Modeling and Control Approach
… to commercial aircrafts: the DraganFlyer and the Hummingbird quadrotors, which have been hardware-modified in order to perform experimental autonomous flying. Furthermore, a first-ever approach for modeling commercial micro coaxial mechanism is presented using a flying-toy called the …
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Longitudinal analysis for binary and count data
… using the results from an experiment on hummingbird learning. These methods enable much more information to be extracted from the hummingbird data set than a more traditional analysis-of-variance, and therefore provide useful and powerful tools for researchers in this subject area.
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A biography of the second
A few blinks of an eye. The time it takes a hummingbird to flap its wings 80 times. For a photon of light to travel from Los Angeles to New York and back almost 40-fold. The second has been there since the literal dawn of time, if one exists. But what defines the second? Like a pop star constantly …
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The structure and stability of ecological networks
… drives abundance or vice versa in plant-hummingbird pollination networks. I find evidence that abundance drives generalisation and use a simple model to show that neutral processes can explain broad patterns of species- level generalisation. In Chapter 3, I quantify the importance and …
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Design and Development of a High-Performance Quadrotor Control Architecture Based on Feedback Linearization
… quadrotor control system for an AscTec Hummingbird quadrotor using direct motor speed control within a Vicon motion capture system environment. A Ground Control Station (GCS) acts as a user interface for selecting flight patterns and displaying sensor values. An on-board Intel Edison …
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Radiation in the genus Amazilia: A comparative approach to understanding the diversification of hummingbirds.
… of morphology and behavior are documented in hummingbirds. I perform a phylogenetic analysis of Amazilia, the largest genus in Trochilidae, and putative sister taxa to test whether the unusual divergence of this genus is an artifact (Chapter 1). Phylogenetic analyses resolve several clusters …
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Real-time control architecture for a multi UAV test bed
… aerial vehicle test bed formed by three AscTec Hummingbird mini quadrotors. The reliable and reconfigurable architecture presented here has a FPGA-based embedded system as main controller. Under the implemented control system, different practical applications have been performed in the MARHES …
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Development and Application of a Classification System for Undisturbed and Disturbed Tropical Montane Forests Based on Vegetation Structure
… participants investigating the distribution of hummingbird-visited plants. Distribution patterns of this functional group could be related to the structural forest types. Recent investigations of bird and moth communities will also be tested for functional relationships.
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Geological Effects and Petrophysical Flow Unit Model for the Middle Bakken Member, South-East Saskatchewan
… Member Siltstone and Sandstone of Viewfield, Hummingbird, Roncott, and Rocanville pools, Court area and minor Torquay-Rocanville Trend in Saskatchewan, Canada. A cross examination of the Bakken core samples, geophysical logs/production history from south-eastern Saskatchewan certifies the …
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Adaptive communication networks for heterogeneous teams of robots
… claims with experimental results using AscTec hummingbird platforms as well as iRobot Create platforms of small 10 client and large 500 virtual client implementations.
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Control architectures for heterogeneous fleets of unmanned vehicle systems
La robotica in campo avionico, da 20 anni fa fino ad oggi, ha avuto una crescita incredibile. Le ragioni sono diverse, ma sicuramente, la motivazione fondamentale è data dallo sviluppo di sensori MEMS e microcontrollori sempre più economici e affidabili. Per quanto riguarda le caratteristiche …