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 12 of 12 for “"Time-to-Contact"”.
-
Time-to-contact statistics as a proxy for accident probabilities
… are relatively rare, and this makes it difficult to study the impact of traffic system changes or vehicle control changes on accident rates. One potential solution to this problem is the use of time-to-contact (TTC) statistics as a proxy for accident probabilities. Low TTC can be used as a measure …
-
Impact of Central Vision Loss on Eye Movements and Time-to-Contact Judgments
Background: Time-to-contact (TTC) judgments can be influenced by eye movements as well as by multisensory stimuli (i.e., presenting a stimulus that has both an auditory and visual component). To date, no study has investigated the interaction between eye movements and unimodal (visual-only) versus …
-
Postural Time-To-Contact, Real-Time Visual Feedback Of Postural Activity, And Motion Sickness
… motion sickness predicts that the subjective symptoms of motion sickness will be preceded by unstable control of posture. In previous research, it has been confirmed with measures of the spatial magnitude and temporal dynamic of postural activity. In the first chapter, I introduced a new measure …
-
Exploring the Effects of Rotation on Time-to-Contact Estimates in a Prediction-Motion Task
<p>The ability to extrapolate an occluded object’s position and arrival time is important for survival. These estimates, however, are not always accurate and can be affected by numerous contextual or object properties in a given situation. Rotational motion reflects changes in local motion signals …
-
Effect of an exercise based intervention on Virtual Time to Contact and Seated Instability Index as a function of seated postural control
… essential component of daily life for non-ambulatory persons with Multiple Sclerosis (PwMS). Multiple sclerosis has negative effects on the central and peripheral control processes, however there is a lack of validated rehabiliatory strategies to improve seated postural control in PwMS. …
-
Visual perception of moving objects: Effects of velocity and direction
The reported experiments were designed to examine the relation between changes in velocity and direction of travel on the perception of a moving object. The effect of these changes on time-to-contact judgements was also investigated. Despite the extensive literature studying the perception of …
-
Dynamic strategies of human postural control
The two goals pursued in this study were to identify controllable dynamic characteristics of human posture and to approach the description of these characteristics by means of computer graphics. The notion that virtual time-to-contact, which specifies the spatio-temporal proximity of the pressure …
-
Delay in accessing healthcare after transient ischaemic attack and minor stroke : the role of primary care in the problem and the solution
… in accessing assessment and vascular risk factor modification should therefore be as short as possible, yet little is known in the UK about where patients seek care and the key influences of the time to contact healthcare services. However, using cohort studies to answer questions on …
-
Analytical SLAM without linearization
… fashion which avoids linearized approximations altogether. Based on creating virtual synthetic measurements, the algorithm uses a linear time-varying (LTV) Kalman observer, bypassing errors and approximations brought by the linearization process in traditional extended Kalman filtering (EKF) SLAM. …
-
THE FUNCTIONAL ROLES OF THE MOTION PERCEPTION SYSTEMS
… form of the changes in binocular disparity over time that result from motion. This dissertation concerns the results of experimental work to determine the functional differences between the systems that utilize these sources of information. In the context of perception of time-to-contact, …
-
An Investigation of Navigation Processes in Human Locomotor Behavior
… means of locomotion, or moving from one point to another. While upright locomotion is a human characteristic, the way humans direct their locomotion has not been studied extensively. Prior to the late 1940's, little research or scholarly thought was published regarding locomotion. In 1950, J. …
-
Analyzing Patient Characteristics Associated With Hepatitis C Follow-Up Care After Implementation Of A Pharmacy Technician-Driven Service
… curable, infectious disease that can lead to substantial cost burden when left untreated. Previous studies have examined models of testing and connecting patients to care for hepatitis C and why patients do not follow-up for hepatitis C care. However, no studies have looked at …