Search Constraints

Start Over
Filtering by: Creator Duringer, J. M. Remove constraint Creator: Duringer, J. M. Committee Member Tate, Janet Remove constraint Committee Member: Tate, Janet

Search Results

  • Geometric reasoning in an active-engagement upper-division E&M classroom

    Creator:
    Cerny, Leonard Thomas
    Abstract:
    A combination of theoretical perspectives is used to create a rich description of student reasoning when facing a highly-geometric electricity and magnetism problem in an upper-division active-engagement physics classroom at Oregon State University. Geometric reasoning as students encounter problem situations ranging from familiar to novel is described using van Zee...
    Resource Type:
    Dissertation
    Full Text:
    E&M Classroom Abstract approved: _____________________________________ Corinne A. Manogue

  • Evaluation of Materials for Use in Open-Cycle Magnetohydrodynamic Power Generation

    Creator:
    Bowen, Michael S.
    Abstract:
    Recent interest in oxy-fuel combustion for carbon capture, as well as advancements in technologies such as magnetics, materials, and computational modeling has sparked renewed interest in magnetohydrodynamic (MHD) power generation. The increased temperatures of oxy-fuel combustion versus air-fuel combustion poses a challenge in the selection of materials for plasma exposed...
    Resource Type:
    Masters Thesis
    Full Text:
    exceeding 100 S/m at 1300˚C while magnesia exhibits electrical conductivities well below 1 S/m for

  • Monte Carlo simulations of magnetic semiconducting Superlattices

    Creator:
    Scott, Silas Menlo
    Abstract:
    Computer simulations invoking the Metropolis Algorithm and Monte Carlo techniques were constructed to model the behavior ofvarious systems of magnetic semiconductors. Among the systems modeled were bulk type II FCC antiferromagnets and simple cubic thin films and superlattices. Studies of bulk antiferromagnets revealed dependence of Neel Temperature on nearest neighbor...
    Resource Type:
    Dissertation
    Full Text:
    Magnetic Semiconducting Superlattices Abstract Approved: Tomasz M. Giebultowicz Computer simulations

  • DNA binding and beyond : an investigation of proteins involved in PAH-induced carcinogesesis

    Creator:
    Hooven, Louisa Ada
    Abstract:
    Exposure to polycyclic aromatic hydrocarbons such as benzo[a]pyrene (B[a]P) has been determined to be a risk factor for various forms of human cancer. PAH DNA adducts have been shown to cause mutations, but carcinogenesis is also accompanied by alterations in gene expression. Inhibiting individual cytochrome P450s could clarify the interaction...
    Resource Type:
    Dissertation
    Full Text:
    : William M. Baird Exposure to polycyclic aromatic hydrocarbons such as benzo[a]pyrene (B[a]P) has been

  • Metallic nanoscale conductors

    Creator:
    Nebergall, Nathan Sky
    Abstract:
    A new, reproducible method of using electromigration to form metallic nano-conductors is developed using gold and a tin-silver alloy. Measurements revealed a quantization of the electrical conductance consistent with the theory of quantum conductance. The theory of quantum conductance is applied to show that a nano-conductor with a cross-section of...
    Resource Type:
    Masters Thesis
    Full Text:
    ) m nq E J τσ 2 == Conductance of the metal is the conductivity multiplied by the ratio of

  • Synthesis and study of oxides and chalcogenides : thin films and crystals

    Creator:
    Park, Sangmoon
    Abstract:
    Several types of solid-state inorganic materials are prepared and characterized. By using the SILAR (Successive Ionic Layer Adsorption and Reaction) deposition method in conjunction with hydrothermal dehydration both low-temperature deposition and crystallization of oxide thin films are achieved. Various aspects of new transparent p-type materials are studied by examining both...
    Resource Type:
    Dissertation
    Full Text:
    . Watson, Dr. Janet Tate, Dr. Joseph J. Karchesy, Dr. Michael M. Lerner, and Dr. W. M. Hetherington for

  • Chemical Solution Deposition and in-situ Structural Characterization of Pb-free, Bi-based, Piezoelectric Thin Films

    Creator:
    Fox, Austin J.
    Abstract:
    This work explores the electric field induced strain mechanisms in environmentally benign Bi0.5Na0.5TiO3 (BNT) based piezoelectric thin films. Although BNT-based materials show promise as replacements for toxic Pb-based piezoelectrics, the displacement mechanisms are not consistent between thin films and bulk materials, and the differences have yet to be well understood....
    Resource Type:
    Dissertation
    Full Text:
    J. Gibbons This work explores the electric field induced strain mechanisms in

  • Bi-based perovskite solid solutions for high energy density thin films

    Creator:
    Emerson, Morgan Rose
    Abstract:
    Electrical energy storage devices are currently the main limiting factor in many electrical devices and with the increasing demands placed on electrical power over fossil fuels, high energy density materials are essential. Previous research by Huang et al. on bulk (1-x)Bi(Zn₁/₂Ti₁/₂)O₃-xABO₃ solid solution systems led to the discovery of an...
    Resource Type:
    Masters Thesis
    Full Text:
    Perovskite Solid Solutions for High Energy Density Thin Films Abstract approved: Brady J. Gibbons

  • Development of bi-based lead-free piezoelectric materials : thin film piezoelectric materials via PVD and CSD routes

    Creator:
    Jeon, Yu Hong
    Abstract:
    Piezoelectric materials have been widely used in electromechanical actuators, sensors, and ultrasonic transducers. Among these materials, lead zirconate titanate Pb(Zr[subscript 1‐x]Ti[subscript x])O₃ (PZT) has been primarily investigated due to its excellent piezoelectric properties. However, environmental concerns due to the toxicity of PbO have led to investigations into alternative materials systems....
    Resource Type:
    Dissertation
    Full Text:
    :
 







































































Brady
J.
Gibbons

 
 Piezoelectric
 materials
 have
 been
 widely
 used
 in
 electromechanical

  • The Formation of Astrophysical Dust

    Creator:
    Mauney, Christopher M.
    Abstract:
    The formation of carbonaceous and silicate precursor molecules to astrophysical dust grains is investigated. Using density functional theory (DFT) in combination with global optimization techniques, the ground-state binding energies of dust precursors are determined. These results are employed in atomistic nucleation theory (ANT) to predict the critical size and nucleation...
    Resource Type:
    Dissertation
    Full Text:
    10 µ m is prominent, along with another feature at 18 µ m. Data and plot are from [Kemper et al