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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Patterns of study guides for the intermediate grades

Fairbanks, Ellen Kelly, O'Keefe, Kathleen Mary, Valpey, Evelyn Ossinger January 1966 (has links)
Thesis (Ed.M.)--Boston University / PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you. / 2031-01-01
22

Electromagnetic scattering by open circular waveguides /

Johnson, Thomas Wesley. January 1980 (has links)
Thesis (Ph. D.)--Ohio State University, 1980. / Includes bibliographical references (leaves 77-79). Available online via OhioLINK's ETD Center
23

Quantum computation with ballistic electron waveguides

Snyder, Michael Garrett, January 1900 (has links) (PDF)
Thesis (Ph. D.)--University of Texas at Austin, 2006. / Vita. Includes bibliographical references.
24

Generalized modal analysis of electromagnetic- and quantum-waveguide structures and discontinuities

Weisshaar, Andreas 29 March 1991 (has links)
Generalized modal analysis techniques for the characterization and modeling of dissipationless planar waveguide structures and discontinuities encountered in microwave and optical integrated circuits, as well as of quantum waveguide structures and devices, are presented. The frequency-dependent transmission properties of the curved microstrip bend are derived by utilizing a second-order perturbation analysis of the equivalent modified curved waveguide model and a mode-matching method which includes the higher order modes. An extension of the mode-matching method for characterization of microstrip right-angle bends and T junctions having a rectangular notch is formulated. The modal solutions for an arbitrary graded-index dielectric slab waveguide are derived by applying the generalized telegraphist's equations to the equivalent inhomogeneous parallel-plate waveguide model with electric or magnetic walls. These modal solutions are employed in a mode-matching procedure to calculate the transmission properties of a step discontinuity in typical diffused optical dielectric slab waveguides. Power loss calculations for an abrupt offset in a diffused optical waveguide show a smooth increase in radiation loss whereas a sharp transition from almost zero to nearly total radiation loss is found for an abrupt change in diffusion depth. In the analysis of quantum waveguide structures, the modal expansions of the wave function together with a mode-matching technique are utilized. The computed generalized scattering matrices (GSMs) of junctions and uniform waveguide sections are combined via an extended GSM technique to obtain the scattering parameters of composite quantum waveguide structures. Results for cascaded right-angle bends and periodic multi-waveguide structures in a split-gate configuration are presented assuming hard wall confinement. For the multisection structures, strong resonant behavior similar to that in resonant tunneling diodes is found. Calculated current-voltage characteristics for a double constriction in GaAs are shown, exhibiting a region of negative differential resistance for temperatures up to approximately 60K with a maximum peak-to-valley ratio of over 80:1. Finally, a uniform narrow constriction with an assumed parabolic - like lateral potential confinement is analyzed by utilizing the modal expansion techniques developed for dielectric waveguides. / Graduation date: 1991
25

The design and simulation of a broadband directional array in a cylindrical waveguide

Aldana, Guillermo Emilio. January 2002 (has links) (PDF)
Thesis (Ph. D.)--University of Texas at Austin, 2002. / Vita. Includes bibliographical references. Available also from UMI Company.
26

The evaluation on the international tour leader training program in Taiwan, R.O.C.

Lan, Yi-Ping. January 2000 (has links) (PDF)
Thesis--PlanB (M.S.)--University of Wisconsin--Stout, 2000. / Includes bibliographical references.
27

A study of a serrated ridged-waveguide /

Tsu, Raphael. January 1957 (has links)
Thesis (M.S.)--Ohio State University, 1957. / Available online via OhioLINK's ETD Center
28

Harmonic generation in isotropic elastic waveguides /

De Lima, Washington Jose, January 2000 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 123-130). Available also in a digital version from Dissertation Abstracts.
29

Quantum computation with ballistic electron waveguides

Snyder, Michael Garrett 28 August 2008 (has links)
Not available / text
30

Stripe quantum well waveguides using implantation induced optical confinement

李德豪, Li, Tak-ho, Alex. January 1997 (has links)
published_or_final_version / Electrical and Electronic Engineering / Doctoral / Doctor of Philosophy

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