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 399 for “"refraction"”.
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Metalenses and Refraction Problems in Optics
This thesis studies several refraction problems involving metalenses using optimal transport techniques. Metalenses are ultra-thin surfaces that are composed of nanostructures to focus light. Mathematically they can be represented by a pair (Γ, Φ) where Γ is a surface in R^3, and Φ is a C^1 …
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Nonlinear refraction and reflection traveltime tomography
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1997.
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Later refraction arrivals in layered liquids
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1959.
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Atmospheric refraction and propagation over curved surfaces
… and experimental investigations of atmospheric refraction and diffraction of sound over curved surfaces. The main contributions of this work are as follows: The development of an alternative method for calculating the influence of wind on sound propagation in the presence of a ground of finite …
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Water Wave Refraction with Non-Linear Theory
<p>Two different kinds of wave refraction models are formulated in the present study using Stokes' third order wave theory. One type of model is utilized in a parametric study employing several different topographies. Wave trajectories obtained from this model, when obtained by using first and …
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Computer-aided interpretation of seismic refraction data
Includes bibliographical references.
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Seismic refraction on-site interpretation method, A
Includes bibliographical references.
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Index of refraction of nickel at high temperatures
Call number: LD2668 .T4 1953 W57
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Index of refraction of nickel at high temperatures
Call number: LD2668 .T4 1953 W57
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The Preparation of Certain Index of Refraction Liquids
<p>The increasing importance of index of refraction liquids in nonopaque mineral determination is stressed, with the fact that sets of index liquids are relatively easy to make with a few media and simple equipment. The desired features of an immersion series are listed. </p><p>The end members …
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Refraction interference elimination employing smart arrays at VHF
Radio interference from the Middle East is one of the most significant problems plaguing the local radio services in Cyprus today. The issue is particularly noticeable on the highway, where it affects in-car tuners in all coastal areas of the island when the weather is hot and humid. In this work, …
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Investigation of refraction effects for small GPS networks
… closures are examined, in order to investigate refraction effects on GPS networks. The effect on GPS baselines of a height bias in the reference point's coordinates is also investigated. A least squares adjustment program is developed and used to obtain a single consistent set of 3-D coordinates …
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A New Framework for Refraction-Based Image Verification
… however we hypothesize that we can learn refraction models independent of scene and for arbitrary refractive objects. We develop a framework for learning such refraction models, where each model can be considered a key to authenticate an image or video. In this way, complex refraction …
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Processing and inversion of Arctic Ocean refraction data
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1983.
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Seismic refraction measurements in the Western Mediterranean Sea
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1963.
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Modeling Of Atmospheric Refraction Effects On Traffic Noise Propagation
… that this represents an approach to incorporate refraction algorithms affecting outdoor noise propagation that must also work with algorithms for geometric spreading, ground effects, diffraction, and turbulence. The new empirical model for predicting atmospheric refraction shows that wind …
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Data preparation and visualization for the SWAN refraction model
… to prepare numerical data required for the SWAN refraction model and to visualize the results in an interactivie three-dimensional graphical context. SWAN (acronym for Simulating Waves Near shore) is a numerical wave model that is used to predict wave parameters according to a given set of …
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