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.
Results
Showing 1 to 20 of 31 for “"Self-motion"”.
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Studies on the rotation problem in self-motion perception
Contains fulltext : 121139.pdf (Publisher’s version ) (Open Access)
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Multisensory integration in spatial orientation and self-motion perception
Contains fulltext : 143186.pdf (Publisher’s version ) (Open Access)
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Vision-Based Self-Motion Estimation in a Fixed-Wing Aerial Vehicle
… describes a complete algorithm to estimate the motion of a fixed-wing aircraft given a series of digitized flight images. The algorithm was designed for fixed-wing aircraft because carefully procured flight images and corresponding navigation data were available to us for testing. After image …
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An examination of the causes of heading bias in computer simulated self-motion
… of human visual performance during simulated self-motion. The experimental stimuli were computer simulations of observer translational motion through a 3-D random dot cloud. Experiments were specifically designed to obtain data regarding the problem of bias in judgments of heading, and to …
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Joint Representation of Translational and Rotational Components of Self-Motion in the Parietal Cortex
… visual inputs to extract information about self-motion relative to one's surroundings. When translations (T) and rotations (R) are present together, the velocity patterns projected onto the retina (optic flow) are a combination of the two. Since navigational tasks can be extremely varied, …
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Adaptation to a linear vection stimulus in a virtual reality environment
… vestibular cues concerning body orientation and motion. Experiment 136 on the Neurolab space shuttle mission explored this research question. The current experiment served as a supporting study, examining human "looming linear vection" responses produced by a virtual checkerboard hallway scene …
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Human Visual Navigation: Effects of Visual Context, Navigation Mode, and Gender
… the final turn angle when simulated self-motion was viewed passively, on large projection screens in a driving simulator. Error increased with increasing size of the internal angle, on route layouts based on equilateral or isosceles triangles. A compressed range of responses was …
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Stationarity Perception and Virtual Reality Sickness
… stable visual environment, a critical skill for self-motion. This perception relies on evaluating signals from eye and head movements for congruence. Through a series of experiments, we systematically manipulated the consistency between visual and vestibular signals to determine the visual range …
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Virtual equivalence : matching visual scene and treadmill walking speeds in virtual reality
… such as moving independently of our head motions. These findings are important for a perceptually sensitive environment, such as virtual reality. Designers of virtual environments that utilize self-motion perception should consider calibrating PERs within a session for each individual user …
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A trajectory illusion and its relations to induced motion and smooth pursuit eye movements
… in part, on the visual system to differentiate self-motion from that of other objects. Research examining the way in which the brain is able to visually disentangle forward locomotion from eye motion, for example, suggests that the brain may have an eye movement compensation mechanism. Other …
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Proclus on Aristotle on Plato. A Case Study on Motion
… and his engagement with Aristotle’s theory of motion with a specific focus on Aristotle’s criticism of Plato. There are two main goals. (i) I refute the widespread view that Proclus – in line with other Neoplatonists – adheres to the idea of an essential harmony between Plato and Aristotle. …
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Artificial gravity : evaluation of adaptation to head movements during short-radius centrifugation using subjective measures
… in the magnitude of inappropriate perceived self-motion sensations and severity of motion sickness. Verbal accounts of perceived pitch, motion-sickness scores and computer animations of subjective sensations were obtained from eight subjects, during three sessions performed at the following …
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A Continuous-Time Nonlinear Observer for Estimating Structure from Motion from Omnidirectional Optic Flow
Various insect species utilize certain types of self-motion to perceive structure in their local environment, a process known as <italic>active vision</italic>. This dissertation presents the development of a continuous-time formulated observer for estimating structure from motion that emulates the …
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The influence of second-order motion on the induction of vection
… in their ability to induce the illusions of motion aftereffect (MAE) and structure from motion. The inability of second-order (SO) motions to support structure from motion except in response to simple motion stimuli has led to the suggestion that SO motions cannot support computations …
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The Functional Dissection of Motion Processing Pathways in the Human Visual Cortex Using fMRI-Guided TMS
Motion-selectivity in human visual cortex comprises a number of different cortical loci including V1, V2, V3A, V3B, hV5/MT+ and V6 (Wandell et al., 2007). This thesis sought to investigate the specific functions of V3A and sub-divisions of hV5/MT+ (TO-1 and TO-2) by using transcranial magnetic …
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Internal Representations and the Importance of Active Control in Dynamic Spatial Orientation
… world. Active observers continuously controlled self-motion whereas passive observers viewed the displays controlled by active observers. During each trial, the display was briefly blacked out. In Experiments 1 and 2, the blackout was followed by a static image. Subjects in these experiments were …
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Attention in a meaningful world: brain responses to behavioral relevance
… patterns of visual stimulation that accompany self-motion. Together, the results converge on the conclusion that attention can be oriented automatically in a dynamic, flexible, and continuous manner on the basis of complex visual stimuli that provide behaviorally relevant information.
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Effects of Auditory Vection Speed and Directional Congruence on Perceptions of Visual Vection
… 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 explore interactions between conflicting visual and auditory vection cues, specifically …
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Software techniques for improving head mounted displays to create comfortable user experiences in virtual reality
… often experience vection, the perception of self-motion in the absence of any physical movement. While vection helps to improve presence in VR, it often leads to a form of motion sickness called cybersickness. Prior work has discovered that changing vection (changing the perceived speed or …
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