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 23 for “"Fiber Bundle"”.
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Dispersion of water sprays in a transverse air jet and the aging of spray nozzles
… used in the manufacturing process of glass fibers. At the onset of the manufacturing process glass fibers are extruded from a pool of molten glass through an array of holes in a heated bushing plate. Before the fibers can be wound onto a spool, the fibers must be coated with a sizing …
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A minimization of a curvature functional on fiber bundles
… and with $\chi(B) < 0.$ We examine two types of fiber bundles M over B with fiber F. The first is a principle fiber bundle with a two-torus fiber and the second is an $S\sp2$ fiber bundle with an SO(3) group action. In each case, the tangent space of the bundle can be decomposed into a vertical …
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Compact Homogeneous Leviflat CR-Manifolds
… homogeneous CR-manifold is a homogeneous CR-fiber bundle, the so-called CR-normalizer fibration, consisting of a projective base and a parallelizable fiber. In codimensions one and two we also give a classification.
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A stochastic tractography system and applications
… White matter tractography enables studies of fiber bundle characteristics. Stochastic tractography facilitates these investigations by providing a measure of confidence regarding the inferred fiber bundles. This thesis presents an implementation of an easy to use, open-source stochastic …
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BUNDLE METRICS IN KALUZA-KLEIN THEORIES AND THE CONSISTENCY PROBLEM
In this work, bundle metrics which allow a unified description of gravity and the other interactions, a la Kaluza-Klein theory, are considered. After recalling some basic notions of fiber bundles and Riemannian geometry, it is shown that the transition functions which give the global structure of a …
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Foliations and exotic index theory
… the corona of the holonomy groupoid is a fiber bundle over the ambient manifold whose fiber is the corona of the universal leaf. By this property, an idea in the work of S. Hurder can be applied to Riemannian foliations on a compact manifold to show that the analytic assembly map for …
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Compressive strength and behavior of 8H C3000/PMR15 woven composite material
… 3000/PMR15 woven composite panels with 60% fiber volume fraction were tested under quasi-static compressive load to failure at room temperature. Micrographic evidence clearly identifies the mode of compressive failure as fiber kinking. Each fiber in the kink fractures because of a …
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Functional formalism for algebraic classical and quantum field theories
… the manifold of smooth sections of a non-trivial fiber bundle. Central is the notion of observables/functionals over such sections, i.e. appropriate smooth functions on them. The kinematic will be further specified by means of Peierls brackets, which in turn are defined via the causal propagators …
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X-ray Micro-Computed Tomography and Deep Learning Segmentation of Progressive Damage in Hierarchical Nanoengineered Carbon Fiber Composites
… composite laminates comprised of carbon (micro) fiber reinforced polymer (CFRP) have become widespread in modern high-performance aerospace structures, providing high, tailorable mass-specific stiffness and strength. However, while underpinning such performance benefits, CFRP microstructural …
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Advancement of fiber image guide based snapshot imaging spectrometer technology for bioimaging and environmental applications
… images and spectra. Previous implementations of fiber based imaging spectrometers were focused on breadboard proof of concept designs and were not optimized for field imaging. This thesis details the development of two generations of imaging spectrometers for remote sensing of crop health and the …
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Carbon fiber electrodes for in vivo neural recording
… implantation and minimal tissue insult. Carbon fibers` high tensile strength and flexibility allow fabrication of micro-scale electrodes that can withstand mechanical challenges in mobile parts of the CNS. Although there are studies showing carbon fibers’ superior qualities as a potential …
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A surgical confocal microlaparoscope for real-time optical biopsies
… depth scan system. The instrument uses a fiber bundle to relay the image plane of a slit-scan confocal microlaparoscope into tissue. The confocal laparoscope was used to image the ovaries of twenty-one patients in vivo using uorescein sodium and acridine orange as the uorescent contrast …
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Mechanical characterization of advanced polyacrylonitrile derived carbon fibers reinforced with carbon nanotubes
… mechanical characterization of individual carbon fibers reinforced with carbon nanotubes (CNTs) which were dispersed in the polyacrylonitrile (PAN) precursor. The carbon nanofibers were obtained from the Georgia Institute of Technology and were fabricated in bundles by the “islands-in-a-sea” …
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Eye Tracking Using Fiber Optics and Computer Vision Techniques
… velocity of the human eye using a combination of fiber optics and imaging optics integrated with a CCD camera, a framegrabber, and a PC. Systems such as the one we describe are needed for monitoring location of interest for better human-computer interfaces and virtual reality simulations, for …
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Functional Organization and Information Processing Within the Suprachiasmatic Nucleus Assessed by Multiunit Recording in Vitro
… methods in vitro. A novel carbon fiber bundle (CFB) multiunit electrode was developed for use in recording the activity of local populations of SCN neurons. Multiunit activity (MUA) recording and single-unit activity (SUA) recording techniques were used to examine circadian rhythms …
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Computational tools for monitoring neural connectivity using calcium imaging
… and recording of neural dynamics. These include fiber-optic cables for targeted optical delivery, genetically encoded calcium indicators (GECI) for optically measuring signaling dynamics, fiber bundles for spatially targeted delivery, and optical system design for adequate integration of these …
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A technique for the analysis of the invariance identities of classical gauge field theory by means of functional equations.
… manifold. An n + r dimensional principal fiber bundle is constructed in order to introduce the usual gauge potentials and field strengths. In addition, a set of r quantities (called "coupling parameters") which transform as the components of an adjoint type (0,1) object and also depend …
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An experimental and theoretical investigation of waveguide scatter, with applications to solution-deposited silica-titania planar waveguides
… streak to a remote image plane (using a coherent fiber bundle) and scanning it using an automated, stepper-motor controlled, apertured photomultiplier tube. Testing and calibration techniques were described in detail. We found that surface-induced scattering was the dominant loss mechanism in the …
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