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 4492 for “"Scattering"”.
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Multiple quark scattering analysis of proton-proton scattering
Proton-proton scattering is investigated in a model in which the protons are composed of quarks and the scattering is due to multiple collisions of the quarkso By including spin in the calculation it was hoped that the differential cross section data could be described without resorting to quark …
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Theory and applications of scattering and inverse scattering problems
… discretizing the object into N subobjects, the scattering solution of an arbitrarily shaped inhomogeneous scatterer can be formulated as a scattering solution of an N-scatterer problem, each of whose scattered fields is approximated by M harmonics. Using the translation formulas, a recursive …
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Modern electromagnetic scattering
… approximation, which is commonly used in wave scattering problems. We show that it is easy to violate causality in the frequency-domain by making the vanishing absorption approximation. We also develop an orders-of-scattering approximation, termed "screened cylindrical void/core" (SCV) …
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Scattering and mesons
… particularly useful for low energy meson-meson scattering. We discuss its basic properties and use it to analyze the isospin 0 and 2 s-wave [pi] [pi] scattering. We construct the S-matrix from our analysis and discuss the physical relevance of its poles. Further details of P for more general …
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Imaging through scattering
… we demonstrate novel methods to overcome optical scattering in order to resolve information about hidden scenes, in particular for biomedical applications. Imaging through scattering media has long been a challenge, as scattering corrupts scenes in a non-invertible way. The use of near-visible …
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Scattering and inverse-scattering problems in a continuously varying elastic medium.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1969.
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Partial-Wave Analysis of Elastic-Scattering and Inelastic-Scattering of Dirac Particles
Made available in DSpace on 2014-12-10T20:13:39Z (GMT). No. of bitstreams: 1 7317327.pdf: 3893048 bytes, checksum: 5c2a16f339cc0875cb08ba8e4f9728f5 (MD5) Previous issue date: 1972
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Ocean bottom seismic scattering
… in seismic data of obvious effects due to scattering from lateral heterogeneities both on and in the seafloor. Detailed fine scale surveys of mid-ocean ridges, where the upper oceanic crust is exposed, have revealed the presence of lateral heterogeneities in the form of complicated …
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Toward Practical Inverse Scattering
… nature of superresolution in nonlinear inverse scattering is studied. The prospect of subwavelength resolution at optically large observation distances is investigated. A perfectly conducting tip is used to enhance reconstruction resolution. Thus, two conjectures as to how superresolution in the …
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Raman Scattering From Metals
Made available in DSpace on 2015-05-13T15:22:07Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7726681.PDF: 7183986 bytes, checksum: babebdd7c0d32064a686f3790ecb3ecf (MD5) Previous issue date: 1977
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Scattering from imperfect interfaces
Scattering from an imperfect planar interface between two different elastic media was studied to examine how the signals induced at the transducers by reflected, transmitted and scattered waves are related to the interface properties. Also, the effect of anisotropy on scattering was assessed by …
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Acoustic Scattering by Gratings
This thesis considers the sound scattering by thin perforated plates, to further understand and develop analytic models for porous noise reduction metamaterials. The semi-analytic Fokas method is extended to periodic geometries, and the resulting integral equation, recognised as a generalised …
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Backward stimulated raman scattering
We present both a theoretical overview and an experimental investigation of the stimulated Raman effect. A new prediction is made for the steady state linewidth of the forward Stokes output in the presence of a depleted pump. The theory is developed with the aim of gaining an understanding of the …
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Fast neutron scattering analysis
The scattering of a beam of fast monoenergetic neutrons is used to determine elemental compositions of small (0.2-1 kg) samples of materials. Particular emphasis is placed on the measurement of concentrations of the elements H, C, N and O, which are the principal constituents of contraband …
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Electron-deuteron elastic scattering
Massachusetts Institute of Technology. Dept. of Physics. Thesis. 1967. Ph.D.
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Novel electromagnetic scattering phenomena
Scattering of electromagnetic waves is fundamentally related to the inhomogeneity of a system. This thesis focuses on several theoretical and experimental findings of electromagnetic scattering under contemporary context. These results vary from scattering off real structures and off synthetic …
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Ocean bottom seismic scattering
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, and Woods Hole Oceanographic Institution, 1990.
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Atom-Molecule Scattering: Close-Coupled and Coupled States Calculations for Argon-Methane Scattering
Made available in DSpace on 2015-05-13T15:17:44Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7726676.PDF: 3008659 bytes, checksum: 8da6496c369f37016bda6382b82e03a7 (MD5) Previous issue date: 1977
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