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 26 for “"Jet Propulsion Laboratory"”.
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Design and Analysis of a Thermal Shield System for the Starprobe Spacecraft.
STARPROBE is a mission option study by the Jet Propulsion Laboratory (JPL) of the California Institute of Technology and Ames Research Center (ARC) of the National Aeronautics and Space Administration (NASA) of an unmanned spacecraft for close-range solar observation.
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High Resolution Wind Retrieval for SeaWinds on QuikSCAT
… estimated from the same scatterometer by the Jet Propulsion Laboratory. The high resolution winds allow features such as the eye of hurricanes to be seen with much greater detail than was previously possible.</p>
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A Process Architecture and Runtime Environment for Dependable Distributed Applications
… spaceborne, scientific applications for the Jet Propulsion Laboratory (JPL). Error injection experiments validate the SIFT environment's ability to recover not only from user application errors, but also ARMOR errors as well. Finally, five other case studies illustrate how the ARMOR-based …
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Composition sensors calibration and characterization and warmup analysis for the Mars Oxygen In-Situ Resource Utilization Experiment (MOXIE)
… rover. MOXIE was developed by MIT and NASA's Jet Propulsion Laboratory (JPL) to demonstrate, for the first time, In-Situ Resource Utilization (ISRU) on another planet by extracting O₂ from CO₂ in the Martian atmosphere using solid oxide electrolysis (SOE). In order to inform and control its …
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Modeling, Design, and Assembly of Spring Tires
… autonomous lunar traversal rover built at NASA Jet Propulsion Laboratory, and IPEx, a lunar regolith mining robot built at Kennedy Space Center. This thesis discusses the modeling of these spring tires with numerical methods along with the design of two spring tire prototypes for use on the …
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Computer Vision Techniques for Drill Bit Identification and Mechanical Wear Detection
… on board the Mars 2020 Perseverance Rover, a Jet Propulsion Laboratory (JPL) mission. The effectiveness of thresholding and segmentation on two critical tasks, drill bit identification and mechanical wear detection, is demonstrated. Then, transfer learning of convolutional neural networks …
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Simulation and study of harmonic interference in power line communications
… using a distribution network provided by the Jet Propulsion Laboratory discussions, and conclusions are presented.
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Ground Station Mixed-Signal PCB and SFP Ethernet-to-Optical Connector for the Deployable Optical Receiver Aperture (DORA) CubeSat
… Optical Receiver Aperture (DORA) project at the Jet Propulsion Laboratory (JPL) in collaboration with Arizona State University (ASU) aims to demonstrate 1 Gbps data rate for crosslink communications among small spacecraft. There are numerous applications for this technology, including satellite …
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Laboratory Characterization of Mars In-Situ Resource Utilization (ISRU) using the Mars Oxygen ISRU Experiment (MOXIE) FlatSat Testbed
… (MIT), MIT Haystack Observatory, and NASA Jet Propulsion Laboratory (JPL) developed the MOXIE FlatSat as a ground-based operational testbed to further characterize the MOXIE system, evaluate and validate planned MOXIE operations on Mars, and demonstrate potential operating modes and …
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Dynamics of multi-body space interferometers including reaction wheel gyroscopic stiffening effects : structurally connected and electromagnetic formation of flying architectures
… Micro-Precision Interferometer testbed at NASA's Jet Propulsion Laboratory. The predictions show great improvement over a simplified "decoupled" analysis method when compared to experimental data. For formation flying interferometers, we consider the use of electromagnets as relative position …
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Innovation Challenges in NASA’s Planetary Program and a Policy Framework for Sustainable and Equitable Space Resource Utilization
… also assessed the difficulties faced by NASA’s Jet Propulsion Laboratory (JPL) and suggested changes to its enterprise architecture. The Chaotic 2.0 architecture was found to be the most flexible and a pain point analysis conducted. An implementation strategy was proposed, and future-proofing …
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Temperature And Pressure Effects On Elastic Properties Of Relaxor Ferroelectrics And Thermoelectrics: A Resonant Ultrasound Spectroscopy Study
… skutterudites are being investigated by NASA's Jet Propulsion Laboratory for advanced thermoelectric generates (TEGs). Effects of nickel (Ni) doping on elastic properties of lanthanum tellurides at elevated temperatures were investigated in the temperature range of 293 K - 800 K. A linear …
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Situationally driven local navigation for mobile robots
… work was supported in part by a grant from the Jet Propulsion Laboratory under a contract from the National Aeronautics and Space Administration, and by a grant from the Naval Surface Weapons Center.
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Multiple Choice Question Answering using a Large Corpus of Information
… this topic because of an internship at NASA’s Jet Propulsion Laboratory, where there is a growing interest in making rovers more autonomous in their field research. Being able to process information and act correctly is a key stepping stone to accomplish this, which is an aspect my dissertation …
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Measuring and predicting radiation-induced soft errors in microprocessors
… Neutron Science Center at the request of NASA’s Jet Propulsion Laboratory. High energy neutrons are the product of galactic cosmic rays entering the earth’s atmosphere. The accelerated measurements can be scaled to the terrestrial or at-altitude neutron flux to predict soft error rates. Neutron …
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Gravity-assist trajectories to Venus, Mars, and the ice giants: Mission design with human and robotic applications
… allowance of impulsive maneuvers using chemical propulsion) for launch dates ranging from 2024 to 2038 for Uranus and 2020 to 2070 for Neptune. Solutions are found using a patched conic model with analytical ephemeris via the Satellite Tour Design Program (STOUR), originally developed at the Jet …
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Spatial and Temporal Variability of Subsidence: Fort Bend County, Texas
… v. 6.3 software package developed by NASA’s Jet Propulsion Laboratory (JPL). Global position coordinates were transformed from the IGS08 reference frame to the Stable Houston Reference Frame (SHRF) using a 14-parameter Helmert transformation. Groundwater-level changes were analyzed for the …
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Development of the polarized Monte Carlo three dimensional radiative transfer model I3RC-POL
… polarized retrievals. To meet this need the Jet Propulsion Laboratory in conjunction with the University of Arizona have developed the Multiangle SpectroPolarimetric Imager (MSPI). In order to accurately interpret the data from MSPI, polarized radiative transfer models must be used and …
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Microthrusters based on the T5 and T6 hollow cathodes
… reaction control system and primary electric propulsion system were able to operate from a common propellant management system.<br/><br/>In recent years experiments on a T6 hollow cathode have demonstrated the possibility of such a device however the performance, in particular thrust …
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Thermal creak induced dynamics of space structures
… understand the range of behaviors. Two laboratory experiments were conducted to demonstrate thermal creak and to correlate with the model behavior. The first experiment, a joint characterization, focused on the local thermal creak response and the friction behavior. The model is shown to …
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