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 38 for “"human spaceflight"”.
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Active Magnetic Radiation Shielding For Long-Duration Human Spaceflight
… space presents dramatic hazards to human survival.</p> <p>Space radiation hazards outside the protection of the Earth’s magnetosphere can</p> <p>produce both acute and chronic health risks and thus become limiting factors for</p> <p>NASA’s planned mission to Mars by the 2030s. …
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A Wearable Countermeasure for Musculoskeletal Deconditioning in Human Spaceflight
In the reduced gravity experienced during human spaceflight, the human body no longer experiences the constant loading provided by Earth’s gravity. Muscles atrophy due to disuse, the spine elongates, which may cause back pain and discomfort, and sensorimotor changes lead to impaired posture and …
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Quantitative probabilistic modeling of environmental control and life support System resilience for long-duration human spaceflight
The future of human space exploration will see crews travel farther and remain in space for longer durations than ever before. For the first time in the history of human spaceflight, the Environmental Control and Life Support Systems (ECLSS) that sustain the crew in their habitat will have to …
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Artificial Intelligence in Human Spaceflight Safety-Critical Systems: A Requirements Framework for AI-Enabled Computer-Based Control Systems
… AI into computer-based control systems (CBCS) in human spaceflight. The computer-based control expectations of those safety-critical systems on the International Space Station (ISS) are captured in SSP 50038, Computer-Based Control System Safety Requirements, with one caveat: the standard was not …
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An operational feasibility assessment for extravehicular activity in human spaceflight under communication delay using an underwater research analogue
As manned space exploration advances beyond low-Earth orbit, new challenges in the planning and execution of mission tasks such as extravehicular activity (EVA) will emerge. One such challenge will be the mitigation of risks associated with communication delay between Earth and remote exploration …
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A technoregulatory analysis of government regulation and oversight in the United States for the protection of passenger safety in commercial human spaceflight
Commercial human spaceflight looks ready to take off as an industry, with "space tourism" as its first application. Paying passengers are likely to begin taking suborbital spaceflights within the next several years, both despite and because of the risks and hazards inherent in human spaceflight. As …
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Enhancing astronaut mobility through spacesuit kinematics and interactive space outreach
Human spaceflight programs are facing new challenges rising from the evolution of the exploration agenda, as well as the changing international panel of actors. Planetary exploration missions will require intensive extravehicular activities (EVA). Simultaneously, the design of such missions will …
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Multiobjective optimization of crewed spacecraft supportability strategies
… a logistical challenge that is unprecedented in human spaceflight. Astronauts will travel farther from Earth than ever before, and stay in space for longer, without access to regular resupply or the option to abort and return home quickly in the event of an emergency. Under these conditions, …
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Off the Orbit: Works of Art for Long-Term Space Travellers. Outline of a novel artistic practice
This research combines the arts with human spaceflight. The aim of the investigation is to identify the aesthetic parameters for display in works of art on extended crewed missions. The study claims that, within the research area of human spaceflight, novel working methods should be developed that …
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On-Orbit Cryogenic Propellant Storage Optimization
… Propellant Storage (CPS) system enables human exploration missions by reducing launch vehicle mass to orbit requirements and providing an extensible approach for human spaceflight missions to near-Earth asteroids, the moon, and Mars. The optimal CPS sun-shield design and attitude control …
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Medical Kits for Commercial Spaceflight Based on Existing Analogs
Human spaceflight has transitioned from a government run enterprise to an increasingly commercial driven endeavor. New companies are sending humans into space under an array of different conveyances and without the resource of institutional medical experience. For these companies, a standard …
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Photoplethysmography for non-invasive measurement of bone hemodynamic responses to changes in external pressure
… one of the limiting factors to long duration human spaceflight. Developments in photoplethysmography (PPG) hardware have made it a promising tool for non-invasive bone hemodynamic measurements. The aims of this thesis are to: 1) validate the use of PPG as a tool for non-invasive bone …
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Towards Earth independence - tradespace exploration of long-duration crewed Mars surface system architectures
… has grown around the prospect of sending humans to Mars for the exploration and eventual settlement of that planet. With the signing of the 2010 NASA Authorization Act, this goal became the official policy of the United States and consequently, has become the long-term objective of NASA's …
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A parametric study of vestibular stimulation during centrifugation
… health problems associated with long duration human spaceflight. Head-turns performed during centrifugation, however, trigger a disturbing vestibular response that is only qualitatively understood. In order to design an efficient incremental adaptation procedure, the present study investigates …
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Modeling and tradespace exploration of a space suit hip bearing assembly using multi-degree-of-freedom range of motion analysis
Space suits are crucial to human spaceflight, but can restrict motion, require additional energy, and increase injury risk. Previous planetary suits were largely based on flexible components, which generate additional forces on the occupant as they resist volumetric changes from flexing components. …
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Engineering Robust and Autocatalytic Architectures for Human Missions to Mars
… approaches are starting to transform the human spaceflight landscape, offering increased mass to orbit capabilities, dramatically reduced unit costs and a falling cost of access to space. In view of the above, the approach in this work is to turn crew size from a constraint to the primary …
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Development of a mechanical counter pressure Bio-Suit System for planetary exploration
Extra-vehicular activity (EVA) is critical for human spaceflight and particularly for human planetary exploration. The MIT Man Vehicle Laboratory is developing a Bio-Suit EVA System, based on mechanical counterpressure (MCP), that has the potential to maximize and even augment the EVA capabilities …
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Multidisciplinary spacesuit modeling and optimization : requirement changes and recommendations for the next-generation spacesuit design
… perform spacewalks is an essential component of human spaceflight. Spacewalks are absolutely crucial for planetary exploration because they enable astronauts to explore their environment, conduct scientific experiments on the planetary surface, construct space-based infrastructure, and perform …
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Multi-level decision-based system architecting
… architecting is applied to multiple future human spaceflight projects. The architecture of the Lunar Surface System and the mission design for a human Near Earth Object (NEO) mission are examined through single-level models. The habitat design for potential NEO missions is further examined …
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Authenticated messages for a real-time fault-tolerant computer system
… need extreme reliability, such as control for human spaceflight. This computer system uses multiple replicated processors to ensure that the system as a whole continues to operate correctly even if some of the processors should fail. In order to maintain a synchronized state, the replicated …
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