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Showing 1 to 20 of 94 for “"Regolith"”.
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Regolith Erosion at Grinnell Glacier, Glacier National Park
<p>Glacier National Park is located within a mountainous region in western Montana. Due to recent glaciation, moraines are present at the upper elevations throughout the park. These young moraines erode at a rapid pace when first exposed by melting ice due to: age, vegetation cover, local climate, …
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New regolith mapping approaches for old Australian landscapes.
The regolith, or ‘critical zone’, forms a discontinuous layer that covers large areas of Earth’s terrestrial surface. It is a dynamic zone that forms and changes through time in response to interactions between air, rocks (minerals), water and biota. Knowledge of regolith is critical because of its …
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Multispecies reactor design for fluorination reduction of lunar regolith
Citronellal was converted over sulphonated polystyrene resin catalysts of different acid loading. The catalysts had been prepared sulphonating a commercial polystyrene resin with sulfuric acid. Catalyst activities were screened in the liquid phase and in the gas phase in a temperature range of 50 …
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Regolith and associated mineral systems of the Eucla Basin, South Australia.
… components. In order to understand the complex regolith geology expressed within the Eucla Basin and its contained HMS deposits, a multi-faceted approach is applied, targeting two broad research areas. The first research area addresses processes acting prior to deposition of the Eucla Basin …
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Automated Plant Morphological Assessment and Microbial Community Monitoring in Simulated Lunar Regolith
… could be addressed by growing crops in lunar regolith-based substrates. However, lunar regolith lacks essential nutrients, requiring organic amendments to support continuous plant cultivation. This study examined the impact of manure-amended lunar regolith simulant on Mizuna mustard growth …
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Cryogenic penetration and relaxation behavior of dry and icy lunar regolith simulants
… space resources focuses on the potential of regolith (extraterrestrial soil) to provide valuable materials, yet regolith properties are poorly characterized at environmental extremes. Extraction concepts require detailed knowledge of the mechanical properties of dry and ice-saturated …
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Investigation Of Material Properties Of Sintered Black Point-1 Lunar Regolith Simulant
… methods of material preparation using lunar regolith simulant for structural applications on the moon. The research employed the use of the regolith simulant known as Black Point-1 (BP-1). This research work presents the methodology used in developing lunar simulant and compares the …
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A MODEL TO PREDICT THE SIZE OF 3D REGOLITH CLUMPS ON PLANETARY BODIES
Prior investigations of the behavior of regolith on the surface of planetary bodies has considered the motion and interactions of individual grains. Recent work has shown the significance of cohesion in understanding the behavior of planetary regolith, especially on small, airless bodies. Surficial …
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Radiative transfer modeling of thermal infrared emissivity spectra: applications to martian regolith observations
Satellite and rover remote sensing of planetary regolith surfaces, in the form of thermal infrared emissivity spectra taken at nadir and off-nadir angles of emergence from the surface, requires use of theoretical models for interpretation of constituent grain physical properties. However, such …
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Molten Regolith Electrolysis reactor modeling and optimization of in-situ resource utilization systems
… In particular, producing oxygen from lunar regolith holds great promise for maintaining life support systems and enabling orbital refueling of chemical propulsion systems to reduce launch vehicle mass. Unfortunately, significant uncertainty as to the mass, power, and performance of such ISRU …
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The REgolith X-ray Imaging Spectrometer flight model : structural design, analysis, and testing
… structural design, analysis, and testing of the REgolith Xray Imaging Spectrometer (REXIS), a student-led instrument on board the National Aeronautics and Space Administration (NASA) Origins Spectral Interpretation Resource Identification and Security-Regolith Explorer (OSIRIS-REx) asteroid …
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Production of helium and neon in the lunar regolith by solar cosmic ray protons
… for the top 1 to 15 centimeters of a model lunar regolith with Na, Mg, Al, and Si contents of 1. mass percent each. Applying these results to the known average chemical composition of the lunar soils, total production rates were computed for the Apollo 11, 12, 14 and 15 soils. The production rates …
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Scaled experimental study on excavation of lunar regolith with rakes/rippers and flat blade
… focuses on loosening and moving of the lunar regolith by a ripper (or rake) and a wide blade with consideration of gravel content. After characterizing the lunar regolith and two of its simulants (JSC-1A and FJS-1), the relationship between the excavation energy and different conditions, …
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Spectroscopic studies of water and water/regolith mixtures on planetary surfaces at low temperatures
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1980.
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Improving the design process of the REgolith X-ray Imaging Spectrometer with model-based systems engineering
… by comparing the historical development of the REgolith Imaging X-ray Spectrometer (REXIS), a student-built instrument on the OSIRIS-REx asteroid sample return mission, against a hypothetical development timeline that incorporates information from system models. The system models, constructed in …
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Manufacture and characterization of sintered icy lunar regolith simulants, and implications for space resources and planetary science, The
… which will be followed by excavating icy lunar regolith, and extracting the volatiles from within it. Before any of these activities can be performed, icy lunar regolith must be characterized and understood, beginning with the emplacement and modification of water ice in lunar cold traps. In …
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Characterization of liquid crystal on silicon SLMs for in-situ Raman imaging for quality control of processed lunar regolith
… gathered during the mission. The use of lunar regolith as a construction and shielding material is particularly important in this context. Sintering or 3D printing of the material is one option. As a contribution to in-situ quality control, this research proposes to realize spatial scanning of …
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Integration and test of the REgolith X-ray Imaging Spectrometer and recommendations for low-cost, high-risk spaceflight programs
… technical goals with limited resources. The Regolith X-Ray Imaging Spectrometer (REXIS) is a Class D student collaboration instrument flying on the NASA OSIRIS-REx mission. This thesis describes and analyzes the NASA management and systems engineering processes that were tailored for REXIS. …
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