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 406 for “"field of view"”.
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Non-Field-of-View Acoustic Target Estimation
This dissertation proposes a new framework to Non-Field-of-view (NFOV) sound source localization and tracking in indoor environments. The approach takes advantage of sound signal information to localize target position through auditory sensors combination with other sensors within grid-based …
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Achromatic and wide field-of-view metalens design
Achromatic and wide field-of-view (WFOV) optical functionalities are desired for various imaging applications. Conventional methods use complicated design approaches or assemble multiple optical components to form achromatic and WFOV lenses. They are bulky and have limited focusing quality. Here a …
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The Useful Field of View of Reading Disabled Children
… or magnocellular pathway deficit. In light of this hypothesis, the present study represents an investigation of the visual processing abilities of both good and poor readers using a new technique which taps several aspects of transient visual input by presenting brief masked targets with …
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Effects of display contrast and field of view on distance perception
Many systems today do not allow the operator to view the environment directly. For example, operators of telerobotic or remote manipulation systems may be far removed from the work site. In these situations, images from cameras at the task site provide the only visual link between the task and …
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Immersive Virtual Reality System Using BIM Application With Extended Vertical Field Of View
… and Plumbing) and other numerous components of a building. Among these components, MEP constitutes about 50% of the project cost, and its design is relatively more complex because of the limited headroom available to locate these components. The coordination of these systems involves locating …
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Computational Optical Imaging Systems for Spectroscopy and Wide Field-of-View Gigapixel Photography
… methods to circumvent the physical limitations of classical sensing. An ideal imaging system would maximize resolution in time, spectral bandwidth, three-dimensional object space, and polarization. Practically, increasing any one parameter will correspondingly decrease the …
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Effect of field-of-view on perceived representativeness and preference of visual simulations
The purpose of this study was to contribute to an analytical framework for creating and validating simulations. This was achieved by investigating viewer response to changes of a single-image variable (field-of-view). Eight images of two different test sites, with fields-of-view that ranged from 40 …
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Experience using a small field of view gamma camera for intraoperative sentinel lymph node procedures
Staging is critical in the management of cancer. Sentinel lymph node (SLN) biopsy is one method used in the assessment of cancer spread. SLN procedures are standard practice in the management of some cancers although; these procedures have only recently been developed and refined. SLN procedures …
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Towards depth-resolved multi-cubic-centimeter field of view endoscopic camera for intraoperative nerve identification.
One out of every five peripheral nerve injuries in the United States has an iatrogenic origin. These injuries can cause chronic neuropathies, paresthesia, and varying functional losses. To reduce the risk of nerve injury, surgeons meticulously identify and track nerves within the surgical field …
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The effect of field-of-view on the manual control of visually simulated aircraft roll
Thesis (M.S.)--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics, 1986.
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Age-Related Changes in the Plasticity of Neural Regions That Control the Functional Field of View
… primarily interested in determining the locus of neural plasticity that allows training in the FFOV task to improve attentional function in older and younger adults. In chapter one, we discussed the neural systems that control the FFOV. We found that the same dual task conditions that produce a …
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Statistical methods for mapping kinetics together with associated uncertainties in long field of view dynamic PET studies
… PET scanning provides multiple time frames, offering more detailed metabolic information. However, traditional methods like Patlak and compartmental modeling are commonly used in data obtained from conventional scanners. The use of constant or exponential residue functions may be limited in …
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Effects of field of view, MTF shape, and noise upon the perception of image quality and motion
… The first was to develop and evaluate a metric of image quality that incorporates a model of suprathreshold contrast and is based upon the perceived magnitude of suprathreshold contrast. The second objective was to determine the effects that common display characteristics, such as MTF shape, …
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Spatially Selective 2D RF Inner Field of View (iFOV) Diffusion Kurtosis Imaging (DKI) of the Pediatric Spinal Cord
… central nervous system (CNS); namely in the form of Diffusion Weighted Imaging (DWI) and Diffusion Tensor Imaging (DTI). While each modality provides valuable clinical information in terms of the presence of diffusion, DWI, and its directionality, DTI, the techniques used for analysis are limited …
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Adult-child Differences in Spatial Learning in an Immersive Virtual Environment as a Function of Field-of-view
Despite the potential of immersive virtual environments (VEs) as educational tools, little is known about how VE system parameters impact a child using the environment. Designers of VE applications targeted at children must rely on studies done with adults to guide their design decisions. The …
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Spatial perception on perspective displays as a function of field-of-view and virtual environment enhancements based on visual momentum techniques
… issues relating to manipulations in geometric field-of-view (GFOV) in perspective displays and the effects of incorporating virtual environment enhancements in the interface based on visual momentum (VM) techniques. Geometric field-of view determines the field-of-view (FOV) for perspective …
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A wide field-of-view multi-area two-photon microscope for simultaneous imaging of sensory and motor cortex in the mouse brain
… processing is essential to the survival of all organisms, as they take in and act on information from their surroundings. Because of the similarities between the cortices of mice and humans, studying sensorimotor processing in mice can tell us more about the same processes in humans. …
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