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 168 for “"Interception"”.
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Interception : a novel
… the fighting theory of interception--haunt Jeremy as he strives to discover how to interpret his world and how to achieve some sense of goodness within it. Outside of the Leduc family story and the flashbacks of Boston, the larger community of Seymour is explored. The …
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Light interception by grain sorghum
Call number: LD2668 .T4 1969 W547
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Light interception by grain sorghum
Call number: LD2668 .T4 1969 W547
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Interception and Analysis of WCDMA Signals
Intercepting wireless signal has been of a great interest for law enforcement and military users as it provides precious information about illegal activity or the enemy intention. To intercept the signal, first, the signal existence must be detected. In case of using the spread spectrum, signal …
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Visual search strategy and interception accuracy
… the questions of how visual search strategy and interception accuracy are influenced by constraints. Two experiments, manipulating spatial and temporal target motion configuration, assessed the role of constraints in interceptive aiming in interception accuracy and gaze control strategy. In …
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Optimal, impulsive, direct ascent, time-fixed orbital interception
A method for determining the optimal impulsive trajectories is applied to minimum fuel, direct ascent, time-fixed intercept trajectories. The optimal trajectory is obtained by satisfying Lawden's necessary conditions expressed in terms of the primer vector. The vehicle is initially at rest on the …
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Mist interception by three species of mountain fynbos
… of the present study was to investigate mist interception by Mountain Fynbos under non-rainfall conditions. Quantitative measurements and qualitative observations of plant-drip and stem-flow from selected plant species were recorded at five experimental sites on the Back Table of Table …
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Interception algorithm for autonomous vehicles with imperfect information
… confidence intervals about points of expected interception. The algorithm assigns the optimal, autonomous chase vehicle from a set of pre-positioned autonomous vehicles, develops movement commands for the assigned vehicle, and considers reassignment of chase vehicles as appropriate given the …
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Optimal strategies for selecting from multiple asteroid interception targets
… systems. The concept is applied to an asteroid interception problem using low-thrust propulsion and solved through a combination of particle swarm optimization (PSO) and a commercial non-linear programming (NLP) solver SNOPT (Sparse Nonlinear OPTimizer). The problem considers an intercepting …
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Snowfall Interception and Ablation in Needleleaf Canopies: Observations and Model Development
… covering 23% of the global landmass. Here, interception by forest canopies plays a crucial role in the terrestrial water cycle and land-atmosphere energy exchanges. Global changes in climate and vegetation cover have the potential to alter how snowfall is intercepted and subsequently …
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Optimal, impulsive, time-fixed orbital rendezvous and interception with path constraints
… for the problem of orbital rendezvous and interception with path constraints. The coplanar case and a restricted class of path constraints are analyzed. A theory based on the extended problem of Bolza in the calculus of variations has been established to determine optimal impulsive …
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Strategies for limiting interference and interception of free space optical communications
Free space optical systems provide an attractive solution to communication needs that require inexpensive, easily deployable links capable of high data rate transmissions. A major challenge of free space optical communication is ensuring the integrity and confidentiality of the transmitted …
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Frequency Interception and Manipulation Vulnerabilities in Myoelectric-Computer Interface Signal Transmission
Neural interface systems such as myoelectric-computer interfaces (MCIs) and brain-computer interfaces (BCIs) assist patients with motor impairments due to injury or neurodegenerative conditions. Neural interface research has focused on device accuracy and usability while neglecting to …
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Coordinated tracking and interception of an acoustic target using autonomous surface vehicles
… also to conduct follow-on long-term tracking and interception of the target, by using anticipated environmental conditions to motivate its decisions regarding optimum tracking range and speed. This thesis contributes a simulated and theoretical approach to using an ASV to maximize signal-to-noise …
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New Methods for the Detection and Interception of Unknown, Frequency-Hopped Waveforms
Three new methods for the detection and interception of frequency-hopped waveforms are presented. The first method extends the optimal, fixed-block detection method based on the likelihood ratio to a sequential one based on the Sequential Probability Ratio Test (SPRT). The second method is …
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Guidance laws for partially-observable UAV interception based on linear covariance analysis
Unmanned Aerial Vehicles (UAVs) have proliferated the skies in recent years as they have become extremely popular for all different kinds of commercial, government, and recreational usage. With all this activity, there remains an open security threat, particularly to airports, soldiers, and large …
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Coordinated tracking and interception of an acoustic target using autonomous surface vehicles
… also to conduct follow-on long-term tracking and interception of the target, by using anticipated environmental conditions to motivate its decisions regarding optimum tracking range and speed. This thesis contributes a simulated and theoretical approach to using an ASV to maximize signal-to-noise …
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Urban Rainfall Interception of Evergreen and Deciduous Trees for the Southeastern United States
Rainfall interception by tree canopies continues to gain interest amongst stormwater management professionals for green infrastructure. Field observations examined variances in interception processes for numerous species for the southeastern U.S. Knowledge gaps for urban rainfall interception …
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Physical modeling and high-performance GPU computing for characterization, interception, and disruption of hazardous near-Earth objects
<p>For the past few decades, both the scientific community and the general public have been becoming more aware that the Earth lives in a shooting gallery of small objects. We classify all of these asteroids and comets, known or unknown, that cross Earth's orbit as near-Earth objects (NEOs). A look …
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