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 17 of 17 for “"Landing Sites"”.
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Monitoring and management of tourist landing sites in the Maritime Antarctic
… phases of shipboard operation - on the ship, in landing craft, and ashore - operations ashore were found to be the most difficult to quantify and likely to show cumulative effects from repeated small perturbations. Thus, landing operations and sites became the main focus of investigation. Three …
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Management requirements for tourist landing sites in the maritime Antarctic and a model plan for Deception Island, South Shetland Islands
… scientific research, and the environment of landing sites. The current obligatory and hortatory requirements have been developed to control activities of tourists, and not to manage the land they use. This protection is insufficient to mitigate such latent problems. This thesis investigates …
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Urban Air Mobility (UAM) Landing Site Feasibility Analysis: A Multi-Attribute Decision Making Approach
This thesis presents methods to place landing sites for the Urban Air Mobility (UAM) concept. The analysis shows an integrated approach to establish UAM landing site requirements, place landing sites based on predicted demand, and estimate the costs associated with UAM landing sites. This thesis …
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Automated Landing Site Evaluation for Semi-Autonomous Unmanned Aerial Vehicles
… is described for identifying obstacle-free landing sites for a vertical-takeoff-and-landing (VTOL) semi-autonomous unmanned aerial vehicle (UAV) from point cloud data obtained from a stereo vision system. The relatively inexpensive, commercially available Bumblebee stereo vision camera was …
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Autonomous Aerial Drone Landing Site Selection on a Maritime Vessel
… system capable of iden- tifying, tracking, and landing on suitable sites aboard a moving ship. Leveraging modifications to the Hazard-Aware Landing Optimization (HALO) algorithm, origi- nally designed for static terrain, the system integrates robust mapping, point cloud registration, and site …
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On Demand Mobility Commuter Aircraft Demand Estimation
… aircraft and vertical take-off with limited landing (VTOL) capabilities, the ODM concept offers on demand transportation service between designated landing sites at a fraction of driving time. The purpose of this research is to estimate the potential ODM demand and understand the challenges …
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Morphing Hypersonic Inflatable Aerodynamic Decelerator (HIAD) Mechanisms and Controls
To enable a crewed mission to Mars, precision landing capabilities of Entry, Descent, and Landing (EDL) systems must be improved. The need for larger payloads, higher landing sites, and controllability has motivated the National Aeronautics and Space Administration (NASA) to invest in new …
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Quantitative Modeling of Water Demand to Support a Continuous Human Presence on Mars
… continuous human presence on Mars is identifying landing sites suitable for human and scientific exploration. The quantity of water needed to sustain human life on Mars is a key driver in the selection of landing sites. However, minimal work beyond first-order water demand estimates has been …
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Using remote sensing to track complex sinuous ripple migration on a barchan dune in Herschel Crater, Mars
… and decision making for potential future landing sites on Mars.
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Analysis and design of propulsive guidance for atmospheric skip entry trajectories
… skip maneuver when attempting to reach distant landing sites. These maneuvers result in the loss of aerodynamic control authority during the skip phase. The physics of the problem were studied through an analysis of the minimum impulsive AV. This analysis was completed for a number of different …
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Reproductive biology, growth and mortality of tylochromis Bangwelensis (Regan, 1920) in Bangweulu lakes and swamps complex fishery.
… and E 029o 34’ 16.9”) that represented the main landing sites was selected. The fish samples were procured from the local fisher’s catches for seven months from March 2019 to September 2019. Length measurements were taken from each fish specimen using a fish measuring board. Weight was measured …
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Real-time Evaluation of Vision-based Navigation for Autonomous Landing of a Rotorcraft Unmanned Aerial Vehicle in a Non-cooperative Environment
Landing a rotorcraft unmanned aerial vehicle (RUAV) without human supervision is a capability that would significantly broaden the usefulness of UAVs. The benefits are even greater if the functionality is expanded to involve landing sites with unknown terrain and a lack of GPS or other positioning …
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Lunar lander propellant production for a multiple site exploration mission
… its own propellant to launch itself to multiple sites of scientific interest. It is compared with two other possible planetary exploration architectures: the multiple mission architecture which sends one mission to each landing site of interest, and the fully fueled architecture which sends one …
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Data-Driven and Dynamically Feasible Trajectory Generation for Real-Time Powered Descent Guidance and Robotic Exploration
… to select and navigate to minimum-risk landing sites. Applications in planetary powered descent and landing, as well as rover path planning, are used to benchmark algorithm performance.
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Mars Precision Entry Vehicle Guidance Using Internal Moving Mass Actuators
Many landing sites of scientific interest on Mars including most of the Southern Hemisphere at elevations above 2km Mars Orbiter Laser Altimeter reference are inaccessible due to current limitations in precision entry guidance and payload deceleration. Precision guidance and large payload …
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GEOGRAPHY AND CYBERSPACE. THE FORGOTTEN RELEVANCE OF TERRITORY FOR DIGITAL POWER
… Chapter II maps submarine fiber-optic cables, landing stations, and data centers. Through historical reconstruction, GIS-based spatial analysis, and graph metrics, it advances and tests four hypotheses: (1) cables disproportionately concentrate around maritime chokepoints; (2) the cable system …
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More Value From the Same Fish: Catch Shares, Fishing Behavior, and Revenues
… from generating potential revenue-side gains, landing decisions also matter to fishery managers looking to incorporate non-efficiency goals, such as equity- or community-focused initiatives, into their quota systems. For example, managers may implement price premiums at disadvantaged landing …