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 14 of 14 for “"Spatial Disorientation"”.
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Spatial Disorientation in Hypergravity: Implication of oculomotor, otolithic and somatosensory cues
… body position were defined in the literature as spatial disorientation, which is principally considered as otolithic origin. In fact, during a forward sustained linear acceleration, the resultant of the imposed acceleration and gravity is no longer aligned with the gravitational vertical. As …
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The Search for the Opto-Kinetic Cervical Reflex and Reduced Roll Reversals in Pilots Viewing a 3-D Perspective Display
… using conventional instrumentation can suffer spatial disorientation (SD) when unexpectedly forced to transition from visual flight to instrument flight during roll maneuvers. This simulator study was conducted to see if a 3-D perspective display could prevent this form of spatial …
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Quantifying the Cognitive, Symptomatic and Neuroendocrine Impact of the Coriolis Illusion; A Countermeasure for Motion Sickness
… position and motion of their bodies, they are spatially disoriented. Spatial disorientation is often induced by aviation illusions, and its consequences include dizziness, confusion, nausea and fatigue. The present research evaluated the severity of cognitive, neuroendocrine and subjective …
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Galvanic Vestibular Stimulation Applied to Flight Training
Between 1994 and 2003 spatial disorientation resulted in at least 202 aircraft accidents, 184 of them resulting in fatalities. Galvanic Vestibular Stimulation (GVS) provides a cost effective and safe way to simulate spatial disorientation and potentially test pilot’s vestibular system prior to …
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A Simulation Study of Pilots' Ability to Perceive Angular Motion under the Influence of Alcohol
… increasing the potential to enter a state of spatial disorientation. The experiments were designed to simulate a real time in-flight scenario, in a rotating flight simulator, where angular accelerations could be controlled and pilots’ thresholds of perceiving a change in angular motion could …
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Navigating Virtual Environments At Scale
… the total distance travelled, which can cause spatial disorientation. Dash is a modified teleportation technique that quickly but continuously displaces the viewpoint as to retain some optical flow and significantly improves path integration while it does not increase cybersickness.
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Eye movement studies with a vestibular prosthesis/
… which can manifest as dizziness, imbalance, or spatial disorientation, is widespread and often caused by inner ear hair cell malfunction. To address these problems, we are developing a vestibular implant analogous to cochlear implants for the deaf. This vestibular prosthesis provides pulsatile …
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Evaluation of primary flight display enhancements for improving general aviation safety
… identified takeoff and climbout, stall, and spatial disorientation as potential root causes that could be addressed with enhancements to the Primary Flight Display of an integrated general aviation cockpit. To address these accident causes, four prototype enhancements were designed, …
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Effects of Auditory Vection Speed and Directional Congruence on Perceptions of Visual Vection
<p>Spatial disorientation is a major contributor to aircraft mishaps. One potential contributing factor is vection, an illusion of self-motion. Although vection is commonly thought of as a visual illusion, it can also be produced through audition. The purpose of the current experiment was to …
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Design and evaluation of an achievability contour display for piloted lunar landing
… the use of automated systems and manual control. Spatial disorientation may occur upon reentering a gravitational field after vestibular adaptation to microgravity during lunar transit. The workload associated with selecting a suitable landing point based on the remaining fuel and current vehicle …
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Models of neurodegeneration using computational approaches
… are the disruptions of circadian rhythms and spatial disorientation. In the present work I first studied the role of Aβ toxicity by comparing the findings of genome-wide association studies in sporadic AD with the results of an RNAi screen in a transgenic C. elegans model of Aβ toxicity. The …
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The Aviation Illusion-Situational Judgment Test: Development and Evaluation
<p>Situational judgment tests (SJTs) are scenario-based assessments that evaluate an individual's capacity to make key judgments relating to specific contexts. While SJTs are traditionally used for personal selection (e.g., managers, customer service personnel, and police officers), SJTs also …
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Motion perception with conflicting or congruent visual and vestibular cues
… sources (e.g. efferent copy, cognition)). This "spatial orientation" is normally subconscious, and information from multiple sense organs is automatically fused into perception. As late as the early nineteenth century, very little was known about the underlying mechanisms, and our understanding …