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.
Results
Showing 1 to 20 of 80 for “"probability of detection"”.
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The influence of probability of detection when modeling species occurrence using GIS and survey data
I compared the performance of habitat models created from data of differing reliability. Because the reliability is dependent on the probability of detecting the species, I experimented to estimate detectability for a salamander species. Based on these estimates, I investigated the sensitivity of …
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EVALUATION OF THE LOGARITHMIC SPIRAL SEARCH PATTERN FOR ANTISUBMARINE WARFARE
This thesis investigates the ability of a searching submarine to locate a recently lost target submarine using the logarithmic spiral search pattern. The study was done by developing a stochastic, time-step simulation to data farm quantitative information. The measures of effectiveness are time to …
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Robust acoustic signal detection and synchronization in a time varying ocean environment
Signal detection and synchronization in the time varying ocean environment is a difficult endeavor. The current common methods include using a linear frequency modulated chirped pulse or maximal length sequence as a detection pulse, then match filtering to that signal. In higher signal to noise …
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Robust acoustic signal detection and synchronization in a time varying ocean environment
Signal detection and synchronization in the time varying ocean environment is a difficult endeavor. The current common methods include using a linear frequency modulated chirped pulse or maximal length sequence as a detection pulse, then match filtering to that signal. In higher signal to noise …
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An Assessment of Visual Encounter Surveys for an Elusive Species: The Dunes Sagebrush Lizard (Sceloporus arenicolus)
… shows a preference for environments comprised of large wind-blown sand dune complexes and dense arrays of shinnery oak (Quercus harvardii). This species occupies a narrow range in the Monahans Sandhills of Texas and the Mescalero Sands of New Mexico and like many habitat specialists, they are …
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Synchronization in Impulse Based Ultra Wideband Systems
… synchronization is very challenging because of their short pulse duration and very low duty cycle. Coherent detection of ultra wide-band signals requires complex channel estimation algorithms. In impulse based UWB systems, suboptimal receivers that require no channel estimation are proposed …
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Essays on Criminal Justice and Inequality
… examine the efficacy and equity implications of data-driven algorithms that are increasingly used in important life-altering decision-making contexts. The third essay investigates when crime responds to punishment.</p><p>The first essay studies the impacts of neighborhood targeting of police …
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Neutron beam monitoring for single-event effects testing
… the detecting elements for accelerated testing of electronics against neutron-induced single event effects (SEEs). The system can measure the transmission along the neutron beam line where several devices are tested simultaneously, allowing beam degradation by upstream experiments to be taken …
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Probability model for a convoy threatened by a submarine launched missile
The advent of the missile firing submarine has added yet another dimension to the problem of defending convoys and task groups during ocean transit. The specific situation wherein the submarine must surface to fire a relatively short range missile against a convoy of ships is considered. The model …
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Optimizing Aviation Security Architectures using the SAFE Model
… wishes to minimize the overall operational costs of their aviation security detection systems. These systems consist of a collection of security devices. The objective of this research is to develop an algorithm to design the optimal system of devices. The Secure Air Flight Effectiveness (SAFE) …
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Harbor Seal (Phoca vitulina) Reproductive Advertisement Behavior And The Effects Of Vessel Noise
… for females. I investigated multiple aspects of these reproductive advertisement displays in a population of harbor seals in Glacier Bay National Park and Preserve, Alaska. First, I looked at vocal production as a function of environmental variables, including season, daylight, and tidal …
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A game theory analysis of proposed strategies of an aerial search for a mobile surface target.
This thesis investigates the problem of aerial search for a mobile surface target. The initial position of the target is known, and a certain amount of time elapses before the search begins. The target has a variety of choices as to speed and direction, and the search aircraft has a choice of …
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The optimal design of groundwater quality monitoring networks under conditions of uncertainty
The design of a monitoring network to provide initial detection of groundwater contamination at a waste disposal facility is complicated by uncertainty in both the characterization of the subsurface and the nature of the contaminant source. In addition, monitoring network design requires the …
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Quantum State Discrimination with Overcompleteness
The central topics of this thesis are operating characteristics for binary hypothesis testing in classical and quantum settings and overcomplete quantum measurements for quantum binary state discrimination. With this we explore decision and measurement operating characteristics defined as the …
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Using an Agilent E5071B Vector Network Analyzer and Rotating Platform
… is well suited for tomographic imaging as it offers high special resolution and a low probability of detection. Some of the UWB applications include ground penetrating radar, medical imaging and some military applications. In this thesis an UWB radar imaging system has been designed and …
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Performance analysis of a space-based GMTI radar system using separated spacecraft interferometry
The development of a model to assess the radar performance capabilities of a sparse aperture space-based GMTI radar system is presented. Airborne radars have provided reliable detection of moving targets for many years. Recent technological advancements have allowed the deployment of radar systems …
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Impact of Uncertainties on Structures Damage Tolerance Parameters
… aims to enhance the understanding and management of aerospace structural integrity. Traditional fracture control methods, such as damage tolerance analysis (DTA), assume deterministic factors, considering uncertainties inherent in material properties, inspections, and operational conditions only …
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Comparative study of non-destructive testing methods of defect detection on aircraft
There is currently an increase in the usage of composite materials both in civilian and military aircraft because of their mechanical resistance, high toughness, reduced weight and immunity to corrosion. Any damage in the fibers of these composites requires an evaluation in order to ensure the …
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A new hybrid acquisition scheme for CDMA systems employing short concatenated codes
With the rapid growth of Personal Wireless Communications in our times and the important role being played by Code Division Multiple Access (CDMA) in the realization of the goals of second generation wireless systems, there is an ever increasing need for the development of better acquisitions …
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Visual Detection of Small Unmanned Aircraft: Modeling the Limits of Human Pilots
<p>The purpose of this study was to determine the key physical variables for visual detection of small, Unmanned Aircraft Systems (UAS), and to learn how these variables influence the ability of human pilots, in manned-aircraft operating between 60-knots to 160-knots in the airport terminal area, …
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