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 20 of 84 for “"AOA"”.
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Comparison of Three Angle of Attack (AOA) Indicators: A Usability Study
<p>Angle of Attack (AOA) is an important aeronautical concept used to understand the performance status of an aircraft during different flight stages. The Federal Aviation Administration (FAA) has indicated the importance of developing and encouraging the use of affordable AOA based systems to …
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Evaluation of Joint AOA and DOA Estimation Algorithms Using the Antenna Array Systems
… system for evaluating various Angle of Arrival (AOA) Position Location (PL) algorithms, such as MUltiple SIgnal Classification (MUSIC) and Estimation of Signal Parameters via Rotational Invariance Techniques ESPRIT algorithms. Since using delay of arrival information can improve AOA estimates and …
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Age of acquisition and semantic typicality effects
Age of acquisition (AOA) is a psycholinguistic variable that significantly influences behavioural measures (response times and accuracy rates) in tasks that require lexical and semantic processing. Its origin is – unlike the origin of semantic typicality (TYP), which is assumed at the semantic …
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Investigation of Factors Influencing Niche Differentiation of Ammonia-oxidizing Archaea and Bacteria in Freshwater Environments
… the environment, the ammonia-oxidizing archaea (AOA) and bacteria (AOB). Here we present a study using cultivation techniques to investigate environmental factors that influence the niche differentiation of AOA and AOB from freshwater environments. In order to investigate factors that drive the …
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Environmental controls on the abundance, diversity, growth, and activity of ammonia-oxidizing microorganisms in temperate forest soils
… the diversity of ammonia-oxidizing archaea (AOA) and bacteria (AOB) at several sites within Coweeta. I found that AOA and AOB diversity were a function of both resource availability (i.e. N availability) and environmental harshness (i.e. soil pH) in line with general ecological theory …
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Fly Like a Naval Aviator: Effect of Procedural Angle-of-Attack Training on Pilot Comprehension and Decision-Making in General Aviation
… FAA streamlined installation of angle of attack (AOA) systems in GA fleets. Yet studies suggest GA pilots are ill-equipped to use these systems without training. Pilot performance suffers when an AOA is added to the flight deck because pilots’ knowledge with these systems is merely declarative …
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The influence of proficiency and age of acquisition on second language processing: An fMRI study of Mandarin-English bilinguals
… has usually studied age of acquisition (AoA) and proficiency separately. Presently, we examined both in parallel, treated as continuous variables. We used fMRI to study neural activity for L2 processing in adult native Mandarin speakers who are L2 English speakers. Behavioral measures of …
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Spectral Fluorometric Characterization of Phytoplankton Community Composition and Biomass, Chromophoric Dissolved Organic Matter, and Photosynthetic Capacity Using the Algae Online Analyzer
… spectral fluorometer, the Algae Online Analyzer (AOA), which is designed and marketed for continuous monitoring purposes. Monospecific algal cultures and natural waters from Oyster Landing, North Inlet, were used to test the AOA's ability to measure total chlorophyll a (chl a), phytoplankton …
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Interactions of caregiver speech and early word learning in the Speechome corpus : computational explorations
… 6 variables and the child's age of acquisition (AoA) for individual words, with the best linear combination of these variables producing a correlation of r = -. 55(p < .001). We then used these variables to obtain a model of word acquisition as a function of caregiver input speech. This model was …
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Optimization of a Vertical-Axis Wind Turbine Airfoils Using Machine Learning, Numerical and Experimental Methodologies
… /퐶 퐷 ), particularly at higher Angles of Attack (AoA ≥ 20°), a critical operational regime for VAWTs. A baseline airfoil of 12-inch chord length and 10-inch wingspan was analyzed using ANSYS Fluent across a range of AoA (0°–90°) at a constant freestream velocity of 10 m/s (Re ≈ 2.0 × 10 5 ). This …
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Brain Structure and Age of Acquisition in Bilinguals and Monolinguals
… whether the age of second language acquisition (AoA) plays any role in determining brain structure. Whereas some studies suggest that bilinguals handle both languages via a single set of cognitive control regions regardless of AoA, others suggest that each language depends on different sets of …
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Synthesis of Inhibitors of Cystathionine β-Synthase
… for colorectal cancer. Aminooxyacetic acid (AOA) is an inhibitor of CBS, yet has a major limitation in that it is not selective and inhibits a variety of other PLP-dependent enzymes. To overcome this limitation, two AOA conjugates were synthesized in an attempt to deliver the inhibitor into …
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Lexico-semantic processing in adult monolingual Russian and bilingual Russian (L1) - English (L2) Speakers
… body of research on the Age of Acquisition (AoA) effects in semantic processing and organisation. The Russian orthography has a unique writing system which is a combination of Roman and Cyrillic alphabets. Semantic priming was of special interest because it provides an opportunity to …
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Sensor arrays for the measurement of dispersive, flexural waves in structures for signal-to-noise ratio enhancement and angle of arrival determination
… (SNR) and determination of angle of arrival (AOA) leading to source localization is given. Array techniques are considered with applications to dispersive flexural waves where the propagation velocity is not constant but dependent on frequency. The theory is validated through experiments with …
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Direction Finding and Beamforming Techniques using Antenna Array for Wireless System Applications
… thesis firstly investigates different types of AOA and beamforming techniques. A comprehensive comparison between the common AOA algorithms is performed to evaluate the estimation accuracy and illustrate the computational complexity of each algorithm. The effect of mutual coupling between the …
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Characterising Spatial and Temporal Ionospheric Variability with a Network of Oblique Angle-of-arrival and Doppler Ionosondes
… a network of oblique angle-of-arrival (AoA) and Doppler ionosondes were installed in central and northern Australia as part of the ELOISE campaign in 2015. This thesis analyses observations from the ELOISE AoA ionosondes, with a focus on characterising the influence of medium- to large- …
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The role of copper proteins in the ammonia oxidation pathway of Nitrosopumilus maritimus
The contribution of ammonia oxidising archaea (AOA) to the global nitrogen cycle has become apparent in recent years. Where previously thought to be driven by bacteria, archaea may outcompete bacteria, particularly in low nutrient environments like unfertilised soils. Ammonia oxidising bacteria …
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Source localization from voice signals
… of determining the azimuthal angle of arrival (AoA) of the human voice, they cannot determine the range of the speaker. This thesis addresses the two-dimensional localization problem: when a user speaks to an Amazon Echo, our goal is to be able to plot their location as a point on a bird’s eye …
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Modelling and resolving of the ambiguous angle of arrival measurements of the SANAE IV SuperDARN Radar
… to unambiguously determine the Angle of Arrival (AOA) for a given target provided it resides below 33ᵒ in elevation when observing along boresight. This dissertation models a subcomponent of this phenomenon and develops an entirely separate pulsed-Doppler radar system on an FPGA platform known as …
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Experimental Evaluation of Wheel-Rail Interaction
… nonlinearly with increasing angle of attack (AoA), while lateral traction increases, also nonlinearly. The AoA is varied from -2.0 to 2.0 degrees, representing a right- and left-hand curve. Lateral traction increases at a high rate with increasing AoA between 0.0 – 0.5 degrees, and increases …
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