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An Ising-like model to predict dielectric properties of the relaxor ferroelectric solid solution BaTiO3 - Bi(Zn1/2Ti1/2)O3, An Ising-like model to predict dielectric properties of the relaxor ferroelectric solid solution BaTiO₃ − Bi(Zn₁/₂Ti₁/₂)O₃

Creator:: Jackson, Dennis L.
Abstract:: We developed a model to investigate the dielectric properties of the BaTiO₃ − Bi(Zn₁/₂Ti₁/₂)O₃ (BT-BZT) solid solution, which is a relaxor ferroelectric and exhibits long range disorder. The model uses ab initio methods to determine all polarization states for every atomic configuration of 2 x 2 x 2 supercells of...
Resource Type:: Dissertation
Full Text:: Abstract approved: David J. Roundy We developed a model to investigate the dielectric properties of the

Radiation Shielding for Space Nuclear Propulsion

Creator:: Caffrey, Jarvis
Abstract:: Nuclear thermal propulsion (NTP) is a viable technology for near-term interplanetary exploration. Of the candidate mission architectures that are currently available for a crewed Mars mission, NTP permits the greatest flexibility in launch window selection and provides the shortest possible trip time, thereby reducing risks associated with cosmic ray exposure,...
Resource Type:: Dissertation
Full Text:: . Abstract approved: ______________________________________________________ David M. Hamby

Temporal gamma-ray spectrometry to quantify relative fissile material content

Creator:: Williford, Russell S.
Abstract:: A new method for delayed gamma-ray spectrometry to quantify the relative content of fissile material is developed and demonstrated to support international efforts in bolstering non-destructive assay capabilities. Previous traditional delayed gamma-ray spectrometry techniques rely upon nuclear data that often carry very high uncertainty. The new method removes the requirement...
Resource Type:: Dissertation
Full Text:: : Steven R. Reese A new method for delayed gamma-ray spectrometry to quantify the relative content

An extension of the quantum theory of scattering to the non-asymptotic regime using Bohmian trajectories

Creator:: Stenson, Jared R.
Abstract:: Quantum mechanics provides a conventional theory of scattering that is limited in at least two ways: it focuses exclusively on the asymptotic regime and, in a more general sense characteristic of all quantum descriptions, provides no concrete account of individual particle evolution in spacetime. This is particularly true during the...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Jared R. Stenson for the

Nonlinear Terahertz Spectroscopy and imaging of Carbon Nanomaterials

Creator:: Lee, Byounghwak
Abstract:: This dissertation presents nonlinear terahertz (THz) properties of carbon nanomaterials investigated by time-resolved high-field THz spectroscopy. In order to determine THz characteristics of nanomaterials, we performed THz power spectrum measurement, THz raster imaging, THz time-domain spectroscopy (THz-TDS) and time-resolved pump-probe experiment on two different types of single layer graphene and...
Resource Type:: Dissertation
Full Text:: : ( a ) T h e t r a n s m i t t e d T H z w a v e f o r m s a n d ( b ) R e l a t i v e

Local Accessibility of Objective, Classical Reality

Creator:: Kincaid, Joshua J.
Abstract:: The fact that measuring a quantum system reduces it to apparently classical behavior, eliminating the interference patterns that are a hallmark of quantumness, cries out for an explanation. That explanation has been provided by the recognition of decoherence,whereby the interference is destroyed by the very interaction that acquires information.We begin...
Resource Type:: Dissertation
Full Text:: (m σL /R )2 σ = 1 σ = 4 σ = 16 σ = 64 (b) 0.5 0.1 m 4L /R Ψ 0.5 0.1 Ψ (a) 0.3 0.3

Scanning photocurrent microscopy study of photovoltaic and thermoelectric effects in individual single-walled carbon nanotubes

Creator:: DeBorde, Tristan
Abstract:: Carbon Nanotubes are a unique family of nanostructures that have shown remarkable promise for mechanical, electrical, and optical applications. Fundamentally similar to the earlier discovered Buckminsterfullerene (C₆₀), carbon nanotubes are hollow cylinders formed from a single sheet of carbon atoms. The research presented in this dissertation investigates several carbon nanotube...
Resource Type:: Dissertation
Full Text:: (1998). 2 Saito, R., Fujita, M., Dresselhaus, G. & Dresselhaus, M. S. Electronic structure of chiral

A thin codimension-one decomposition of the Hilbert Cube

Creator:: Phon-On, Aniruth
Abstract:: For cell-like upper semicontinuous(usc) decompositions G of finite dimensional manifolds M, the decomposition space M/G turns out to be an ANR provided M/G is finite dimensional ([Dav07], page 129 ). Furthermore, if M/G is finite dimensional and has the Disjoint Disks Property (DDP), then M/G is homeomorphic to M ([Dav07],...
Resource Type:: Dissertation
Full Text:: Pohjanpelto, David Finch, Ed Waymire, Robert M. Burton, Vrushali A. Bokil who taught me various mathematical

Optical, electronic, and thermodynamic properties of layered mixed anion compounds

Creator:: Vielma, Jason Michael
Abstract:: Mixed anion compounds that form ZrCuSiAs-type crystal structures exhibit remarkable properties such as superconductivity at low temperatures, hole conduction with optical transparency in the visible region, and exciton absorption at room temperature. In this thesis, properties of a selected group of materials out of the very large set of mixed...
Resource Type:: Dissertation
Full Text:: ) ∣∣∣∣∣ n+M (r) − δF [n] δn(r) ∣∣∣∣∣ n−M (r) , (2.16) 9 in which the functional derivative is defined

Discrete-time quantum walks via interchange framework and memory in quantum evolution

Creator:: Dimcovic, Zlatko
Abstract:: One of the newer and rapidly developing approaches in quantum computing is based on "quantum walks," which are quantum processes on discrete space that evolve in either discrete or continuous time and are characterized by mixing of components at each step. The idea emerged in analogy with the classical random...
Resource Type:: Dissertation

ScholarsArchive@OSU

An Ising-like model to predict dielectric properties of the relaxor ferroelectric solid solution BaTiO3 - Bi(Zn1/2Ti1/2)O3, An Ising-like model to predict dielectric properties of the relaxor ferroelectric solid solution BaTiO₃ − Bi(Zn₁/₂Ti₁/₂)O₃

Radiation Shielding for Space Nuclear Propulsion

Temporal gamma-ray spectrometry to quantify relative fissile material content

An extension of the quantum theory of scattering to the non-asymptotic regime using Bohmian trajectories

Nonlinear Terahertz Spectroscopy and imaging of Carbon Nanomaterials

Local Accessibility of Objective, Classical Reality

Scanning photocurrent microscopy study of photovoltaic and thermoelectric effects in individual single-walled carbon nanotubes

A thin codimension-one decomposition of the Hilbert Cube

Optical, electronic, and thermodynamic properties of layered mixed anion compounds

Discrete-time quantum walks via interchange framework and memory in quantum evolution

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