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 29 for “"Space Environments"”.
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Responsive Space Environments: New Paradigms in Blending Virtual and Physical Exploration through Human-Robot Operations
As humanity wanders further into space, the integration of robotics and virtual environments in space systems becomes increasingly pivotal, augmenting our capacity to explore, interact, and study remote environments. This research delves into the use cases, benefits, and challenges associated with …
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Development of New Space-Oriented Polymer-Based Materials: Investigating their Applications and Behaviours in Simulated Space Environments [Sviluppo di Nuovi Materiali A Base Polimerica per Utilizzi in Ambito Spaziale: Studio Delle Loro Applicazioni e Comportamento in Ambiente Spaziale Simulato]
La frontiera dell'esplorazione umana si sta espandendo oltre la Terra, rendendo sempre più urgente il progresso della scienza dei materiali al fine di sostenere la vita e le operazioni nello spazio. Con missioni verso la Luna, Marte e oltre, i materiali impiegati nella costruzione di habitat …
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A compact neutron spectrometer for detecting neutrons produced by cosmic rays
… cosmic radiation that are found in aviation and space environments have impacts on both biological and technological systems. A compact neutron spectrometer that is safe to operate in an aviation environment and suitable for detecting these secondary neutrons has been developed. The detector …
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New Security Paradigms for Spacecraft and Networks: Metrics, Testbeds, and Scalable Solutions
The rapid expansion of commercial spaceflight, driven by reduced launch costs and increased private investment, has transformed the landscape of space-based communications. Proposed mega-constellations comprising thousands of satellites promise global connectivity, linking directly to handheld …
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Vision-Aided Navigation for Autonomous Vehicles Using Tracked Feature Points
… navigation of mobile robots in GPS-denied environments such as indoor environments, cluttered urban environments, or space environments such as asteroids, other planets or the moon. The experimental results show that combining pose information extracted from IMU readings along with pose …
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Three Methods for Solving the Low Energy Neutron Boltzmann Equation
… two and three layer configurations in various space environments and compared to Monte Carlo data where available.</p>
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Reliable and efficient wireless communication channel management using optimization and artificial intelligence
… and reliable communication across various environments has become increasingly important. In densely deployed Enterprise Wireless LANs (E-WLANs), traditional strongest-signal-based Access Point (AP) selection can lead to network imbalance and suboptimal throughput. To address this, we …
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Modification of a Ground Based Atomic Oxygen Simulation Apparatus to Accommodate Three Dimensional Specimens
<p>The space environment presents various challenges when designing systems and selecting materials for applications beyond Earth’s atmosphere. For mission success, these challenges must be considered. One of the detrimental aspects of the space en- vironment is Atomic Oxygen, AO. Only present in …
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Sensitivity of Feedforward Neural Networks to Harsh Computing Environments
… error rates from neutrons were calculated for space environments to determine if these architectures were robust enough to survive. It was determined that large MLPs, ResNet50, and InceptionV3 could survive in Low Earth Orbit on commercial memory technology and only use software error …
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Silicon-Germanium Heterojunction Bipolar Transistors for High-Temperature and Radiation-Rich Environments
Extreme environments pose unique challenges to all types of electronics. These extreme environments can cover a variety of different conditions, including, but not limited to, low temperatures, high temperatures, radiation, pressure etc. One technology that has shown promising robustness in extreme …
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Atomic Oxygen Effects on Particulate Contamination and Short Beam Strength of Carbon Composites
<p>In order to design a successful space system, the unique challenges of the space environment it will operate in must be considered during the design process. Atomic oxygen (AO) is a detrimental environmental effect found in Low Earth Orbit (LEO) that affects spacecraft surfaces by oxidizing and …
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MICROGRAVITY-INDUCED ALTERATIONS IN THE BRAIN-TO-BONE AXIS: IMPLICATIONS FOR BONE LOSS AND COUNTERMEASURE DEVELOPMENT IN LONG-TERM SPACEFLIGHT.
Space exploration over the next 30 to 50 years is projected to initially return to the Moon, with the creation of a permanent lunar settlement, followed by the establishment of a human colony on Mars. To ensure the success of these missions beyond low Earth orbit, it is essential to thoroughly …
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Effects of Atomic Oxygen on the Vacuum-Induced Mass Loss Properties of a Variety of Spacecraft Materials
<p>The space environment influences spacecraft design and material selection in many ways. Two aspects of the space environment that were of interest for this research are the vacuum and atomic oxygen (AO) environments. This project used the outgassing testing chamber and the AO chamber in the Cal …
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Increased biopolymer pigment production in bacteria and fungi exposed to ionizing radiation
A major concern for manned space missions is ionizing radiation, which is known to pose both acute and chronic risks to many organisms. It is critical to expand strategies for radiation protection, including utilizing new materials and fabrication methods designed to support and augment health and …
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The Restorative Potential of Public Aquariums: Psychological and Physiological Effects of Viewing Sub-Aquatic Environments
The role of natural environments, especially ‘green space’, in promoting human health and well-being is well-researched. However, less is known about the benefits of ‘blue space’ (e.g. the coast) or ‘managed’ nature (e.g. zoos). In this thesis, six studies investigated the restorative potential of …
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Refurbished and 3D Modeled Thermal Vacuum Chamber
<p>Spacecraft testing includes acoustics, vibrations, and thermal vacuum. Cal Poly’s Space Environments Lab is equipped with multiple vacuum chambers, but no thermal vacuum chamber. The purpose of this thesis is to incorporate an ATS Chiller system with the HVEC vacuum chamber so students are able …
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System Dynamics Modeling and Analysis of Continuous Production Agility: Policies and Enablers for Resilient Satellite Constellations
As space becomes more proliferated with satellite constellations from commercial and government actors, the ability to deploy and sustain these critical assets on-orbit grows in importance. The traditional risk-adverse approach for space systems trended towards longer development cycles and highly …
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Molecular Mechanisms of Airway Epithelial Progenitor Cell Maintenance and Repair.
… the distal most part of the lung, the alveolar space, are specialized to facilitate gas exchange. Proximal to the alveoli is the airway epithelium, which provides an essential barrier and is the first line of defense against inhaled toxicants, pollutants, and pathogens. Although the postnatal …
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Effects of Atomic Oxygen on Outgassing of Silicone Materials
<p>An important consideration for spacecraft material selection is the space environment that the spacecraft will be operating in. Two features of the space environment that drive material selection are material outgassing and the presence of atomic oxygen in low Earth orbit (LEO). Materials that …
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Fire Simulation Cost Reduction for Improved Safety and Response for Underground Spaces
… (3D-1D) fire simulations of underground space environments. The proposed methodology was demonstrated to be a useful technique for the determination of near and far fire fields, and could be applied across a broad range of flow simulations and mine geometries. Moreover, this research …
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