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 2231 for “"Gradients"”.
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Formation of morphogen gradients
… leads to an increased robustness of the created gradients with respect to morphogen over-expression. Indications for this kind of robustness have been found in experiments. Furthermore, we theoretically investigate morphogen gradient formation in disordered systems. Here, an important question is …
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Mesh modification using deformation gradients
Computer-generated character animation, where human or anthropomorphic characters are animated to tell a story, holds tremendous potential to enrich education, human communication, perception, and entertainment. However, current animation procedures rely on a time consuming and difficult process …
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Electric field gradients in copper alloys
Submitted by William Weathers (weathrs2@illinois.edu) on 2012-03-02T21:38:42Z No. of bitstreams: 1 1974_whalley.pdf: 2101323 bytes, checksum: 6c2a3629b0bc84f49541dc7330f6f81b (MD5)
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Neutrophil Chemotaxis in Multiple Chemoattractant Gradients
… cells move in response to extracellular chemical gradients, plays a prominent role in the mammalian immune response. During this process, a number of chemical signals, called chemoattractants, are produced at or proximal to sites of infection and diffuse into the surrounding tissue. Immune cells …
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Vegetation gradients in Southern Cape mountains
Southern Cape Mountain fynbos has been little studied in the past so that management and planners have had to draw heavily on Western Cape experience. This study arose from the need to define local vegetation patterns and their interdependence with animal life, climate and soil as a necessary …
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Examining Intracellular Phosphorylation Gradients During Cell Division
… formation. Previously, spatial phosphorylation gradients have been reported for CPC substrates, raising the possibility that CPC-dependent signaling establishes order on the micron-length scale in dividing cells. However, this hypothesis has not been tested, largely because of incomplete …
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NMR multiple quantum filters via RF gradients
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1994.
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Liquid level gradients on bubble cap trays
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Chemical Engineering, 1950.
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Beyond Gradients: Using Curvature Information for Deep Learning
This thesis investigates optimization and interpretability techniques for deep learning, extending beyond gradient-based methods to incorporate curvature information. We begin by addressing the limitations of first-order optimization methods like gradient descent, which can exhibit slow convergence …
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Thermal gradients and water transfer in unsaturated soil.
An investigation into the flux of soil water under the influence of a thermal gradient was conducted in closed soil systems in the laboratory. A thermal gradient was imposed across the sandy loam soil columns and measured continuously for the duration of the experiment. The movement of soil water …
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Kinematic and Abundance Gradients in the Galactic Disk
… obtained for the purpose of investigating the gradients of abundance and velocity dispersion in the galactic disk. The abundance gradient found for these stars is d (Fe/H) /dR = $-$0.017 $\pm$.007 dex/kpc, which is similar to the gradients found in other studies of mixed-age objects. $U$ …
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Quasiconvex optimization via generalized gradients and symmetric duality
… problems are studied using Clarke's subgradients. Several conditions sufficient for optimality are derived. Under certain regularity conditions on the constraint functions, we also prove that a modified version of the classical Karush-Kuhn-Tucker conditions is both necessary and …
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Microscopic Forces and Flows due to Temperature Gradients
… is unlike transport on the macro-scale. Pressure gradients typically dominate effects on a large scale while thermal gradients contribute negligibly to the motion of fluid. The situation entirely reverses on the nano-scale. At a microscopic level, flows induced by thermal gradients are caused by …
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Structural analysis of automating measurements of floor gradients
It is useful for one owning or buying a house to be able to assess its structure and identify the existence and severity of any damage. No previously existing method appears to make this assessment easily available. This thesis predicts that architecture will fail in some combination of eleven …
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Potential applications of magnetic gradients to marine geophysics
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1967.
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Temperature gradients in a dry Wilson Cloud Chamber
Thesis (B.S.) Massachusetts Institute of Technology. Dept. of Physics, 1957.
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Engineering chemoattractant gradients using controlled release polysaccharide microspheres
Chemoattractant gradients play important roles in the normal function of immune system, from lymphocyte homeostasis to mounting efficient immune responses against infection. Improved fundamental knowledge about the role of chemoattractant gradients developed around single source cells in …
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Particle Manipulation Using Electric Field Gradients in Microdevices
… (cDEP) devices. The electric field gradients in cDEP devices were altered to optimize selectivity and to determine an estimated membrane capacitance for each. From the results, the membrane capacitance of the early to intermediate stages proved to be very similar; however, late stage …
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Dynamic in-Plane Potential Gradients for Actively Controlling Electrochemical Reactions: Part I. Characterization of 1- and 2-Component Alkanethiol Monolayer Gradients on Thin Gold Films. Part II. Applications of in-Plane Potential Gradients
… of 1- and 2-component alkanethiol monolayer gradients is investigated. Numerous surface science tools are employed to examine the distribution in coverage obtained by application of in-plane potential gradients. Macroscopic characterization was obtained by sessile water drop contact angle …
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