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 1470 for “"Curvature"”.
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Geometry and analysis of Ricci curvature and mean curvature flows
… the geometry and analysis of spaces with Ricci curvature bounded below from the following three perspectives and the asymptotically conical singularities of mean curvature flows in the following two perspectives. For the spaces with Ricci curvature bounded below, firstly we study the unique …
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Curvature Contingent Color Aftereffects.
This paper will deal with curvature contingent color aftereffects (AE), a development from the pattern contingent aftereffects reported by Celeste McCollough (1965). After McCollough’s findings are described briefly, the relative importance of spatial frequency characteristics in inducing AE will …
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Sequences of compact curvature
… to as quasicomplexes, i.e. a sequence whose curvature is not equal to zero in general. In this situation the cohomology is no longer defined. Note that it depends on the structure of the underlying spaces whether or not an operator is "small." This leads to a magical mix of perturbation and …
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Understanding Membrane Curvature Sensing
… states to perform their functions. To study the curvature sensitivity of proteins, I have developed a single-particle assay using NanoSight technology that tracks the Brownian motion of particles to measure their size. I optimised this system to track fluorescently labelled lipid-binding domains …
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Substrate curvature measurement system
… without prior knowledge of the initial substrate curvature. A four-quadrant position sensitive detector (PSD) with relevant Lab View software and programs were also introduced into the system.
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Curves, Knots, and Total Curvature
… of various results dealing with the total curvature of curves in Euclidean 3-space. There are two primary results: Fenchel's theorem and the theorem of Fary and Milnor. Fenchel's theorem states that the total curvature of a simple closed curve is greater than or equal to $2\pi$, with …
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Curvature Detection by Integral Transforms
… of an object, is a crucial task. Especially the curvature of an edge is of great practical relevance. In this thesis, we develop different methods to detect a variety of edge features, among them the curvature. We first examine the properties of the parabolic Radon transform and show that it can …
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Shape curve analysis using curvature
… faces using functions of bending, called curvature functions, of important feature curves. These curvature functions are not only of use to define an object, they are apt for use in the comparison of two or more objects. Methods to produce curvature functions which provide an accurate …
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Global Finish Curvature Matched Machining
… in tool path generation for SSM. Five-axis curvature matched machining (CM2) is the most efficient. With the widespread use of 5-axis mill in industries, CM2 is a better solution for improving the machining efficiency for product concept models. CM2 has very good performance for global …
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Contact Manifolds of Positive Curvature
Made available in DSpace on 2014-12-09T22:17:31Z (GMT). No. of bitstreams: 1 6612391.pdf: 1956645 bytes, checksum: e7daa62333d2b1487fa61b2cc8edc00c (MD5) Previous issue date: 1966
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The Exploration of Sagittal Spine Curvature: Validating a surface topography method & relating curvature to physical function
Abnormal or altered sagittal spine curvature is associated with poor health-related outcomes including pain, impaired physical function and mobility, decreased quality of life, and increased mortality. Therefore, it is important to both understand its consequences as well as accurately measure and …
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Contact Surface Curvature Length Specifies Graspability
… fashion. We recomputed the ratio using surface curvature length of the object instead of the diameter as the relevant object property. The thinking was that the hand forms an arc when making contact with the surface of the object, thus, the size of the area over which the hand makes contact with …
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Conformally Flat Spaces of Bounded Curvature
… factor is subharmonic then the space has curvature bounded above by zero, and, subject to a growth constraint, if the logarithm of the conformal factor is subharmonic under all conformal transformations then the curvature is bounded below by zero. If the space has Lipschitz conformal …
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Convexity and curvature in Lorentzian geometry
… satisfies $\mathcal{R} \geq K $ if the sectional curvatures are bounded below by $K$ for spacelike planes and above by $K$ for timelike planes (similarly, a space-time satisfies $\mathcal{R} \leq K$ if the aforementioned inequalities are reversed). We demonstrate that these curvature bound …
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Uniqueness problems in mean curvature flow
We investigate uniqueness phenomena in mean curvature flow, focusing on two central problems: the behavior of the flow near singularities and the extension of the flow beyond singular times. These questions have significant applications in geometry, topology, and analysis. For the first problem, …
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Moment-curvature relationships in reinforced concrete
… stresses at various layers are computed. Moment-curvature relationships are then obtained from these. The stress-strain curves adopted are from El-Metwally and Chen (1989). The effects of tension stiffening and softening are included by adopting realistic stress-strain curves in both compression …
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Scalar Curvature Constraints on Symplectic 4-Manifolds
… concerns it- self with distances, angles, areas, curvatures, etc., all of which typically vary from one point on the manifold to the next, topology studies properties of manifolds that are unaltered and remain constant when varying the metric. In this thesis we first provide a general overview of …
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Relating diameter and mean curvature for varifolds
… of weight measure zero and the generalized mean curvature is locally summable to a natural power (dimension of the varifold minus one) with respect to the weight measure. The thesis presents an improved estimate of the set where the lower density is small in terms of the one dimensional Hausdorff …
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Digital Curvature Estimation: An Operator Theoretic Approach
… into two parts. The first part is devoted to the curvature estimation of piecewise smooth curves using variation diminishing splines. The variation diminishing property combined with the ability to reconstruct linear functions leads to a convexity preserving approximation that is crucial if …
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