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 “"OSIRIS"”.
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Optimized Thruster Allocation Utilizing Dual Quaternions for the Asteroid Sample Return Mission (OSIRIS-REx)
… This thesis presents a simulation of the OSIRIS-REx mission during the descent phase to the asteroid Bennu, with a focus on utilizing dual quaternion dynamics and a newly developed thruster allocation method. The dual quaternion based dynamics are chosen in order to demonstrate its …
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Radiation management, avionics development, and integrated testing of a Class-D space-based asteroid X-ray spectrometer
… and built payload instrument aboard NASA's OSIRIS-REx asteroid sample return mission. The interplanetary target for this mission is a primitive asteroid known as Bennu that is believed to be relatively unchanged since the formation of the Solar System over 4.5 billion years ago. The primary …
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A new approach of identifing the function of the elevated beds at Deir el-Medina
… symbolize the deceases’ connection with Re and Osiris. It also signifies a change after the Amarna period with an influx in Osiris worship. The iconographies surviving upon the elevated beds convey the deceased being reborn within the field of reeds signifying that the elevated beds were …
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Limb scatter measurements of high altitude cloud distributions
… Spectrograph and Infrared Imaging System (OSIRIS) satellite instrument measures the spectrum of sunlight scattered from the Earth's atmosphere at wavelengths from the ultraviolet (280 nm) to the near infrared (810 nm). The limb scattering measurement technique allows OSIRIS to collect …
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Durability problems of the archaeological construction materials in aqueous and subaerial environments, with applications for restoration and conservation in Egypt and Sudan
… Anfushi?s Necropolis; and fluvial: Abaton/Osiris Temple). To achieve this goal, field observations, analytical (X-ray diffraction, X-ray fluorescence, Raman spectroscopy, UV-Vis spectrometry), microscopic (binocular microscope, polarizing microscope and scanning electron microscope), …
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Fault tolerant design implementation on radiation hardened by design SRAM-Based FPGAs
… design of the REXIS imaging payload on the OSIRIS-REx asteroid sample return mission.
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Characterization of solar X-ray response data from the REXIS instrument
… Identification, Safety, Regolith Explorer (OSIRIS-REx) mission. During the primary science observation phase, the REXIS Solar X-ray Monitor (SXM) experienced a lower than anticipated solar x-ray count rate. Solar x-ray count decreased most prominently in the low energy region of instrument …
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A root cause analysis of REXIS detection efficiency loss during phase E operations
… Identification, Safety, Regolith Explorer (OSIRIS-REx) mission. During main science operations, the instrument experienced detector efficiency loss in the form of loss of iron calibration source counts, which greatly affected the science output. In this thesis, a root cause investigation is …
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Abydos in the Late Period: an epigraphic and prosopographic study
… closely related to the popularity of the cult of Osiris. Finally, the fluctuating appeal of the cult of Osiris at Abydos, as reflected in the extant material, is briefly discussed.
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Mechanical design, calibration, and environmental protection of the REXIS DAM
… the student-collaboration experiment aboard OSIRIS-Rex, an asteroid sample return mission sponsored by the NASA New Frontiers program. OSIRISREx is scheduled to launch to near-Earth asteroid Bennu in 2016. REXIS is a coded-mask imaging X-ray spectrometer that supports the missions scientific …
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Characterization of solar X-ray response data from the REXIS instrument
… Identification, Safety, Regolith Explorer (OSIRIS-REx) mission. During the primary science observation phase, the REXIS Solar X-ray Monitor (SXM) experienced a lower than anticipated solar x-ray count rate. Solar x-ray count decreased most prominently in the low energy region of instrument …
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The engineering design of the REXIS Solar X-ray Monitor and risk management considerations for resource constrained payload development
… aboard the NASA New Frontiers Program's OSIRIS-REx spacecraft. Set to launch in 2016 OSIRIS-REx will travel to, survey, and return a sample from the near-earth asteroid Bennu. One of five hosted payloads, REXIS images the asteroid in the soft x-ray spectrum. The REXIS science goals are to …
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Integration and test of the REgolith X-ray Imaging Spectrometer and recommendations for low-cost, high-risk spaceflight programs
… 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. Part of the Class D approach is to accept more risk to meet schedule and cost requirements. This added risk is …
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Application of Bayesian-based uncertainty and global sensitivity analyses to spacecraft thermal design
… a student built x-ray spectrometer aboard NASA's OSIRIS-REx mission. Uncertainty analysis shows the area of the main instrument's radiator could have been reduced by 11%, as compared to the design obtained from conventional techniques, and still have a 99% probability of meeting the thermal …
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Speaking Out of the Dust: Religious Reenactments with the Specific Iconic Identity of Place
… for theatre do not have. The Passion of Osiris in Ancient Egypt and the celebrations and commemorations of the early Christian Church are two examples of theatrical reenactments of sacred events in sacred spaces. Although such performances have been uncommon since those of the early …
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The formation and evolution of planetary systems
… System. We do this within the context of NASA's OSIRIS-REx asteroid sample return mission. OSIRIS-REx, which launches in September 2016, will arrive at the near-Earth asteroid 101955 Bennu in 2019 with the objective of constraining its composition, orbit, and other bulk properties. In order to …
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Improving the design process of the REgolith X-ray Imaging Spectrometer with model-based systems engineering
… (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 SysML, capture the topological information about the system including the …
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Study of the properties of hydrogen and deuterium in beta phase palladium hydride and deuteride
… using quasielastic neutron scattering on Osiris at ISIS (Harwell, UK) and IN5 at The Institut Laue Langevin (Grenoble, France). Separate sorption measurements are also reported for each isotope to allow accurate determination of diffusion coefficients. Diffusion coefficients are reported …
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Studies of Stratospheric and Tropospheric Ozone, NO2, and BrO Using UV-Visible Spectroscopy in the Arctic and at Mid-latitudes
… Spectrograph and InfraRed Imaging System (OSIRIS) satellite instruments. Ozone from all instruments agrees to within 12.0%, while NO2 measurements agree to within 33.2%. There are no apparent systematic changes in the observed differences between the satellite and the ground-based …
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PURIFICATION AND CHARACTERIZATION OF THE JUNO LIQUID SCINTILLATOR: FIRST RADIOPURITY RESULTS
… the JUNO detector and by the ancillary detector OSIRIS. After the beginning of the official JUNO data-taking with the full detector on August 26th, I have performed the analysis of the first two months of data to study the detector response (analyzing the calibration data) and the radioactive …
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