Index Catalog // ScholarsArchive@OSU

Classical Density Functional for the Weeks-Chandler-Andersen Soft-Sphere Repulsive Potential using Soft Fundamental Measure Theory

Creator:: Finster, Kirstie L.
Abstract:: We present a classical density functional to model the soft, repulsive potential of a Weeks-Chandler-Andersen (WCA) fluid using Soft Fundamental Measure Theory (SFMT) with temperature-dependent parameters inspired by the Barker-Henderson method. Our functional uses soft spheres to model the soft-sphere WCA potential, and gives results that are in good agreement...
Resource Type:: Dissertation

Path Sums and Proper Times in Causal Sets

Creator:: Shuman, Samuel A.
Abstract:: In this thesis, we explore a general method for constructing path sums in a discrete spacetime using a jump amplitude matrix. This is accomplished by deriving a composition law that relates jump amplitudes to the propagator. Then properties of causal sets are used to average this relationship over sprinklings. This...
Resource Type:: Masters Thesis

Locating and Observing Pulsars for Use in Gravitational Wave Detection

Creator:: Díaz, Ian H.
Abstract:: By studying gravitational waves, we can gain new insights into the merging events between massive objects such as black holes as well as neutron stars. Moreover, studying low-frequency waves allows us to observe merging events between supermassive black holes at the centers of galaxies, which in turn allows us to...
Resource Type:: Honors College Thesis

Analysis of Radio Signals for New Pulsar Detection

Creator:: Downing, Jaden
Abstract:: The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) times periodic signals from pulsars as a method of detecting gravitational waves. NANOGrav detects waves emitted in the nanohertz frequency range, a range lower than those previously explored by other organizations. This allows for the study of rarely observed sources such...
Resource Type:: Honors College Thesis

Searching for Pulsars for Use in Gravitational Wave Detection

Creator:: Connolly, Genevieve J.
Abstract:: Gravitational waves (GWs) are disturbances in spacetime that can be caused by events such as black hole mergers and supernovae, as well as continuous sources such as binary star systems. GWs offer a new avenue of astrophysical research and can reveal information about the early universe. GW detection can be...
Resource Type:: Honors College Thesis

Total Kinetic Energy Release in the Fast Neutron Induced Fission of 237Np

Creator:: Pica, Ashley
Abstract:: The total kinetic energy (TKE) in the fast neutron induced fission of 237Np was measured for neutron energies from En = 2.6 – 45.7 MeV at the LANSCE- WNR facility. The postTKE release decreases non-linearly with increasing incident neutron energy and can be represented as TKE(MeV) = (169.365 ± 1.551)...
Resource Type:: Dissertation

Freezing of a Weeks-Chandler-Anderson Fluid using Classical Density Functional Theory

Creator:: Finster, Kirstie L.
Abstract:: We use Classical Density Functional Theory (cDFT) to predict the freezing of a Weeks-Chandler-Anderson (WCA) fluid, and construct pressure-temperature and temperature-density phase diagrams. A WCA fluid consists of soft spheres that exhibit the repulsive portion of the Lennard-Jones potential widely used to model the interaction of two neutral atoms. Our...
Resource Type:: Masters Thesis

Advancing Renewable Gas Storage using Flat-histogram Methods

Creator:: Pommerenck, Jordan K.
Abstract:: This work introduces the novel flat-histogram Monte Carlo (MC) method stochastic approximation with a dynamic update factor (SAD) and explores the convergence properties of a variety of related weight-based MC methods. The new method is applied to a number of physical `test’ systems including the 2D Ising model, a square-well...
Resource Type:: Dissertation

Magnetotelluric Constraints on Lithospheric Properties in the Southeastern United States

Creator:: Murphy, Benjamin S.
Abstract:: By inverting EarthScope long-period magnetotelluric (MT) data from the southeastern United States (SEUS), we obtain electrical conductivity images that provides key insights into the geodynamics of this region. Significantly, we resolve a highly electrically resistive block that extends to mantle depths beneath the modern Piedmont and Coastal Plain physiographic provinces....
Resource Type:: Dissertation

Expediting the Generation and Analysis of Amorphous Oxide Computational Models: Modeling Complex Systems Swiftly

Creator:: Buchanan, Jacob C.
Abstract:: In this dissertation, the process of computational modeling of amorphous oxide materials is studied. Amorphous oxides have random atomic arrangements with no long-range structural order which makes it difficult to study structure-property relationships. Despite the difficulties, amorphous oxides have great uses as semiconductors and dielectrics in thin-film transistors. The ability...
Resource Type:: Dissertation

ScholarsArchive@OSU

Classical Density Functional for the Weeks-Chandler-Andersen Soft-Sphere Repulsive Potential using Soft Fundamental Measure Theory

Path Sums and Proper Times in Causal Sets

Locating and Observing Pulsars for Use in Gravitational Wave Detection

Analysis of Radio Signals for New Pulsar Detection

Searching for Pulsars for Use in Gravitational Wave Detection

Total Kinetic Energy Release in the Fast Neutron Induced Fission of 237Np

Freezing of a Weeks-Chandler-Anderson Fluid using Classical Density Functional Theory

Advancing Renewable Gas Storage using Flat-histogram Methods

Magnetotelluric Constraints on Lithospheric Properties in the Southeastern United States

Expediting the Generation and Analysis of Amorphous Oxide Computational Models: Modeling Complex Systems Swiftly

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