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Filtering by: Creator Faridani, Adel Remove constraint Creator: Faridani, Adel Non-Academic Affiliation Oregon State University. Graduate School Remove constraint Non-Academic Affiliation: Oregon State University. Graduate School

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  • Nonuniform sampling problems in computed tomography

    Creator:
    Gratton, Larry A.
    Abstract:
    Two problems involving high-resolution reconstruction from nonuniformly sampled data in x-ray computed tomography are addressed. A technique based on the theorem for sampling on unions of shifted lattices is introduced which exploits the symmetry property in two-dimensional fan beam computed tomography and permits the reconstruction of images with twice the...
    Resource Type:
    Dissertation
    Full Text:
    : _______________________ _ Adel Faridani Two problems involving high-resolution reconstruction from nonuniformly

  • π-line reconstruction formulas in computed tomography

    Creator:
    Hass, Ryan Andrew
    Abstract:
    X-ray computed tomography is a noninvasive imaging modality capable of reconstructing exact density values of 3D objects. Computed tomography machines are deployed across the world to provide doctors with an image that reveals more detail than a standard x-ray image. We investigate algorithms based on exact computed tomography reconstruction formulas...
    Resource Type:
    Dissertation
    Full Text:
    -Line Reconstruction Formulas in Computed Tomography Abstract approved: Adel Faridani X-ray computed

  • Nonuniform Sampling Of Band-limited Functions

    Creator:
    Al-Hammali, Hussain Y.
    Abstract:
    In this thesis, we will study certain generalizations of the classical Shannon Sampling Theorem, which allows for the reconstruction of a pi-band-limited, square-integrable function from its samples on the integers. J. R. Higgins provided a generalization where the integers can be perturbed by less than 1/4, which includes nonuniform and...
    Resource Type:
    Dissertation
    Full Text:
    . Title: Nonuniform Sampling Of Band-limited Functions Abstract approved: Adel Faridani In this thesis

  • Nonperiodic sampling theorems and filter banks

    Creator:
    Behmard, Hamid R.
    Abstract:
    Sampling theorems provide exact interpolation formulas for bandlimited functions. They play a fundamental role in signal processing. A function is called bandlimited if its Fourier transform vanishes outside a compact set. A generalized sampling theorem in the framework of locally compact Abelian groups is presented. Sampling sets are finite unions...
    Resource Type:
    Dissertation

  • Determination of the Filippov solutions of the nonlinear oscillator with dry friction

    Creator:
    Moreland, Heather L.
    Abstract:
    In previous papers by Awrejcewicz in 1986 and Narayanan and Jayaraman in 1991, it was claimed that the nonlinear oscillator with dry friction exhibited chaos for several forcing frequencies. The chaos determination was achieved using the characteristic exponent of Lyapunov which requires the right-hand side of the differential equation to...
    Resource Type:
    Masters Thesis
    Full Text:
    shared. Many thanks to the members of my committee, Professors Jeff Barnes, Adel Faridani, and John Lee

  • Student & textbook presentation of divergence

    Creator:
    Smith, Emily M.
    Abstract:
    This thesis explores student understanding of divergence in physics settings. The various uses of divergence in physics are detailed. Textbook approaches to divergence are categorized as geometric, curvilinear coordinate, discussion-based, and algebraic statement. Textbook approaches to the divergence theorem are categorized as geometric, equivalent integrals, mathematical statement with explanation, and...
    Resource Type:
    Masters Thesis
    Full Text:
    other members of my committee, Dr. David Roundy, Dr. Janet Tate, Dr. Emily van Zee, and Dr. Adel

  • Coupled dynamics of bouys and mooring tethers

    Creator:
    Idris, Krisnaldi
    Abstract:
    Time-domain models were developed to predict the response of a tethered buoy subject to hydrodynamic loadings. A coupled analysis of the interaction of a buoy and its mooring is included and three-dimensional response is assumed. External loadings include hydrodynamic forces, tethers tensions, wind loadings and the weight of both cable...
    Resource Type:
    Dissertation
    Full Text:
    and committee members; Dr. Adel Faridani, Dr. William G. McDougal and Dr. Lorin Davis. Dr. Reubeen

  • Finite volume method modeling of corona discharge microreactor oxidization of dibenzothiophene

    Creator:
    Fan, Xiangru
    Abstract:
    The growing need for cleaner fuels requires the development of better deep fuel desulfurization methods. The current study presents a reaction model for the mechanism of dibenzothiophene oxidization by dissolved oxygen occurring in a corona discharge microreactor. In the present work, a Finite Volume Method model of the reactor is...
    Resource Type:
    Masters Thesis
    Full Text:
    thesis work. And thanks for Dr.chang , Dr. faridani and Dr.Zhang for being my thesis committee. A

  • Finite element transport using Wachspress rational basis functions on quadrilaterals in diffusive regions

    Creator:
    Davidson, Gregory G.
    Abstract:
    Wachspress rational functions are ratios of polynomials having certain properties which make them good candidates for basis functions in finite element methods. In addition. it had been theorized that Wachspress rational weight functions should Provide a full-resolution discretization of the neutral particle transport equation in thick diffusive regions, but this...
    Resource Type:
    Masters Thesis

  • Pion-nucleon interactions in the chiral color dielectric model

    Creator:
    Lu, Dinghui
    Resource Type:
    Dissertation
    Full Text:
    highly appreciated. I thank Dr. Rubin Landau, Dr. Adel Faridani, Dr. Albert Stetz, Dr. Victor Madsen