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 39 for “"Translational motion"”.
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Using new tools to study the neural mechanisms of sensation: Auditory processing in locusts and translational motion vision in flies
… the speed sensitivity of Drosophila for apparent motion during flight. I also developed a flexible approach to presenting optic flow scenes for functional imaging of motion-sensitive neurons. Finally, through the on-line analysis of behavioral measures, image rendering, and display streaming with …
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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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Translational and Rotational Control of an Asteroid Orbiting Satellite
… are constructed to control both rotational and translational motion of the satellite so that the control objective is achieved. Computer simulations are carried out to illustrate the effectiveness of the control laws.</p>
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Control System Design and Simulation of Spacecraft Formations via Virtual Formation Approach
… constructed to control both the rotational and translational motion of a group of spacecraft. Several computer simulations are performed to illustrate the effectiveness of the modified control laws. The ephemeris and attitude data files generated via Matlab are exported to Satellite Tool Kit …
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Characterization of cyclic-di-GMP signaling with the Lyme spirochete, Borrelia burgdorferi
… cycle progression. Deletion of rrp1 disrupted translational motion and swarming patterns by causing extended cell runs, eliminating stops/flexes, and reducing swarming capabilities. This was attributed to a defect in N-acetyl-D-glucosamine (NAG) metabolism and chemotaxis. NAG is a major source …
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Numerical study of the nonlinear dynamics of the acoustic drops and bubbles
… to interpret the nonlinear dynamics of the drop motions. It is found that the stability of shape oscillations imposes an upper limit on the acoustic bond number that can be used, while the lower limit is set by the stability of translational motion. The static equilibrium shapes can be obtained …
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Control System Design and Simulation of Spacecraft Formations
… are constructed to control both rotational and translational motion of a group of spacecraft. Computer simulations are carried out using Matlab to generate the ephemeris and attitude data, which are exported to Satellite Tool Kit (STK) to create animations. The process by which Matlab is used to …
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Advanced Light Field Frame Prediction For Optimized Compression
… to handle both rate distortion optimized motion compensation as well as latency during the encoding and decoding process. This paper focuses on a contribution approach that uses advanced prediction with affine and translational motion models and optimized view prediction structures. This …
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Three dimensional flow analysis by the vortex-lattice method
… lifting bodies undergoing arbitrary motions. So far, the present method has been applied to thin surfaces in translational motion. Several cases were tested, such as rectangular, delta, sweptback and trapezoidal planforms. Emphasis has been placed on the comparison of the results with …
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The Dynamics of Non-Equilibrium Gliding in Flying Snakes
… animals and how the pitch angle affects their translational motion. Chapter 3 combines flying snake glide experiments and detailed dynamic modeling to address what is aerial undulation and how each kinematic component affects rotational stability and translational performance. Chapter 4 …
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Dynamics Of Anisotropic Gold Nanopartilces In Synthetic And Biopolymer Solutions
… indicated significant diffusional anisotropy for translational motion, whereas the rotation of the rods closely followed the ‘caging theory’.</p>
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Robust motion estimation techniques
… THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Motion estimation is a very important step in many video processing tasks, including video compression, object tracking, and etc. A video may experience both global motion and local object motion. Global motion includes camera rotation, zooming, and …
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An examination of the causes of heading bias in computer simulated self-motion
… 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 determine …
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Software Simulation of an Unmanned Vehicle Performing Relative Spacecraft Orbits
The challenge of sensing relative motion between vehicles is an important subject in the engineering field in recent years. The associated applications range from spacecraft rendezvous and docking to autonomous ground vehicle operations. The focus of this thesis is to develop the simulation tools …
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Constrained trajectory optimization of a soft lunar landing from a parking orbit
… was initially performed with two-dimensional translational motion, and the minimally constrained optimal trajectory was found to be operationally infeasible. Operational constraints, such as a positive descent orbit perilune height and a vertical terminal velocity, were imposed to obtain a …
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Dynamics of an unbalanced ring spinning on a rough horizontal surface
… tops and gyroscopes, is observable in the motion of an unbalanced ring spinning on a rough horizontal surface. An analytical and numerical study is performed to investigate the general motion of an unbalanced ring modeled as a thin ring with a particle attached to its rim. The translational …
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Modeling the properties of silicates
… than in framework silicates. Correlated motion is found among the ADPs that is consistent with TLS rigid body motion. For these data, the translational motion is represented by the ADPs of the central T atom while both the librational and translational motion is contained in those of the …
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Foundations of the Geometric Mechanics Udwadia-Kalaba Framework for Rigid Body Constrained Motion Analysis
… herein are multiple tools for constrained motion analysis extended to different dynamical frameworks. The Udwadia-Kalaba (UK) formalism for the constrained motion analysis of a point mass is a well-documented and applied methodology. Here, UK formulation is generalized to the dynamics of …
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Rigid Body Constrained Motion Optimization and Control on Lie Groups and Their Tangent Bundles
<p>Rigid body motion requires formulations where rotational and translational motion are accounted for appropriately. Two Lie groups, the special orthogonal group SO(3) and the space of quaternions H, are commonly used to represent attitude. When considering rigid body pose, that is spacecraft …
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Initiation and Evolution of the South Dakota Tornado Outbreak of 24 June 2003
… with damage paths veering to the left of the translational motion of the parent storm. A review of published accounts of tornado paths in previous outbreaks shows leftward tornado movement motion is not uncommon, but it usually occurs as leftward trochoidal curls at the end of a long-track …
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