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 12 of 12 for “"Near Space"”.
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Developing Hybrid Near-Space Technologies For Affordable Access To Suborbital Space
… power rockets and high altitude balloons are two near-space technologies that could be combined in order to provide access to the mesosphere and, eventually, suborbital space. This "rockoon" technology has been used by several large budget space programs before being abandoned in favor of even …
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Testing the Re-designed SuperDARN HF Radar and Modeling of a Twin Terminated Folded Dipole Array
… of researchers interested in Earth's near-space plasma environment. This group uses high frequency (HF) radars and backscatter from magnetic field-aligned plasma irregularities to study space weather manifested in the Earth's magnetosphere and ionosphere. Space weather impacts many …
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Recommissioning REDDI: Reviving a Doppler Asymmetric Spatial Heterodyne Spectrometer for Observing Thermospheric Winds
… of REDDI into the INSpIRe (Investigating Near-Space Interaction Regions) trailer at Embry-Riddle Aeronautical University (ERAU), Daytona Beach, began in 2016 with assembly of the new input optics in 2017. REDDI and INSpIRe will remain at ERAU until full loadout and instrument checkout is …
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Characterization of a piezoelectric transformer plasma source
… a compact RF driven plasma source developed for near-space and microspacecraft propulsion. The PTPS uses the mass transfer of emitted charged particles from the plasma to produce thrust. The PTPS utilizes the piezoelectric transformer effect to aid in plasma production. The applied RF signal …
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High-altitude, long-endurance UAVs vs. satellites : potential benefits for U.S. Army applications
Satellites have become a critical component of nearly every aspect of modern life. In addition to well-known civilian applications, military applications of space-based platforms include supporting mission operations through communications; intelligence, surveillance and reconnaissance (ISR); and …
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A study of dusty plasma environment
Future space explorations emphasize the need to understand the space environment in particular the effect they pose on crews and space-bound vehicles. One of such environment is the dusty plasma environment, where fine particles can be found in abundance. Dust particles interact with space plasma, …
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Cognitive and anatomical correlates of neglect for peripersonal and extrapersonal space
… such a general functional dissociation between near and far space processing in the brain remains conflicting: The majority of research has been focussed on line bisection errors which reflect only one small aspect of neglect behaviour. In addition, some behavioural findings suggest a functional …
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Models for the study of neuronal activity during cognitive tasks
… and visual stimuli in the representation of the near space around the body (peripersonal space). This work describes an original neural network to simulate representation of the peripersonal space around the hands, in basal conditions and after training with a tool used to reach the far space. …
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Investigating social cognition and personal space through tactile event-related potentials in virtual reality
… over the somatosensory cortex in peripersonal space (PPS) have been found in previous research, with a similar enhancement occurring during social cognition. This heightened somatosensory response is indicative of the brain’s sensitivity to respond to multisensory stimuli in the space …
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Radiosonde High Altitude Measurements of Radiation Levels and Cosmic Ray Events
… above us, cosmic rays are hurtling in from space. These fast moving particles crash uncontrollably into molecules in the atmosphere, causing spontaneous decays of these particles. Despite the fact that we are broadly shielded from this radiation on earth, these particles can still disturb …
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A Remote Observatory for Geocoronal Hydrogen Emissions
<p>The Investigating Near Space Interaction Regions (INSpIRe) observatory is an adaptable research facility that is designed to use Fabry-Perot interferometer (FPI) to study the faint Balmer series emissions of the terrestrial upper thermosphere and exosphere, collectively known as the geocorona. …
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Setting Constraints on the Lunar Exosphere: A Comprehensive Analysis of Velocity Resolved Sodium and Potassium Line Profile Measurements
… source mechanism for the lunar sodium exosphere near subsolar points while contributions from charged particle sputtering and micrometeoroid impact vaporization are more important near the dawn and dusk terminators. For potassium, the exosphere exhibits dawn-dusk asymmetry because of impact …