Now showing items 68-87 of 394

    • Crack detection in a three dimensional body 

      Redpath, Steven F. (2006-05)
      We propose a method of analyzing a crack in a three dimensional body. We treat the problem as an inverse problem and apply Green’s Theorem, Trace Theorem, and the Fredholm Alternative. We model the problem using Helmholtz ...
    • Curvature and symmetries of closed four-manifolds with a lower curvature bound 

      Bosgraaf, Austin (Wichita State University, 2020-05)
      This thesis details homeomorphism classi cation theorems for closed, simply connected, Riemannian 4-manifolds admitting an isometric circle action. We proceed by imposing progressively weaker curvature conditions, which ...
    • Deep underground neutrino experiment (DUNE) near detector conceptual design report 

      Abed Abud, Adam; Abi, B.; Acciarri, R.; Acero, Mario A.; Adamov, G.; Meyer, Holger; Muether, Mathew; Roy, P.; Solomey, Nickolas (MDPI, 2021-09-29)
      The Deep Underground Neutrino Experiment (DUNE) is an international, world-class experiment aimed at exploring fundamental questions about the universe that are at the forefront of astrophysics and particle physics research. ...
    • Deformations of Q-curvature II 

      Lin, Yueh-Ju; Yuan, Wei (Springer, 2022-02-11)
      This is the second article of a sequence of research on deformations of Q-curvature. In the previous one, we studied local stability and rigidity phenomena of Q-curvature. In this article, we mainly investigate the volume ...
    • Derivation and regularization of corrections to propagators and vertices for cubically interacting scalar field theories 

      Traverzo, Richard (Wichita State University, 2013-05)
      This thesis, a mainly expository work, attempts to give all the calculational details for some popular models in scalar quantum eld theory that serve a mostly pedagogical purpose. Starting with a real scalar eld with ...
    • Design, construction and operation of the ProtoDUNE-SP liquid argon TPC 

      Abed Abud, A.; Abi, B.; Acciarri, R.; Meyer, Holger; Muether, Matthew; Solomey, Nickolas (IOP Publishing, 2022-01-04)
      The ProtoDUNE-SP detector is a single-phase liquid argon time projection chamber (LArTPC) that was constructed and operated in the CERN North Area at the end of the H4 beamline. This detector is a prototype for the first ...
    • Development, thermal and dielectric investigations of $PVDF-Y_2O_3$ polymer nanocomposite films 

      Taha, T. A.; Mahmoud, Mohamed H.; Hamdeh, Hussein H. (Springer, 2021-04-03)
      This work involves preparing $PVDF-Y_2O_3$ polymer nanocomposites to improve thermal and dielectric properties. X-ray diffraction, SEM, FTIR, TGA and dielectric measurements were applied for these films. The cubic crystal ...
    • Effect of gallium additions on reduction, carburization and Fischer-Tropsch activity of iron catalysts 

      Beasley, Charles; Gnanamani, Muthu Kumaran; Hamdeh, Hussein H.; Martinelli, Michela; Davis, Burtron H. (Springer US, 2018-07)
      Undoped and gallium-doped iron oxide catalysts (100Fe, 100Fe:2Ga, and 100Fe:5Ga) were prepared by following a continuous co-precipitation technique using ammonium hydroxide as precipitant. The catalysts were characterized ...
    • Effect of H2S in syngas on the Fischer-Tropsch synthesis performance of a precipitated iron catalyst 

      Ma, Wenping; Jacobs, Gary; Sparks, Dennis E.; Shafer, Wilson D.; Hamdeh, Hussein H.; Hopps, Shelley D.; Pendyala, Venkat Ramana Rao; Hu, Yongfeng; Xiao, Qunfeng; Davis, Burtron H. (Elsevier B.V., 2016-03-05)
      The sulfur limit, the relationship between the sulfur added and the surface Fe atoms lost (Fe/S), and mechanism of sulfur poisoning were studied using an iron Fischer-Tropsch synthesis (FTS) catalyst (100 Fe/5.1 Si/2.0Cu/3.0K). ...
    • Effect of low-temperature opacities on stellar evolution 

      Sharma, Aditya (Wichita State University, 2021-12)
      Stellar evolution is studied through computational models of stars since any perceived change in the stars can take thousands if not millions of years. One of the physical quantities that defines the evolution of a star ...
    • Effect of support pretreatment temperature on the performance of an iron Fischer-Tropsch catalyst supported on silica-stabilized alumina 

      Keyvanloo, Kamyar; Huang, Baiyu; Okeson, Trent; Hamdeh, Hussein H.; Hecker, William C. (MDPI, 2018-02-12)
      The effect of support material pretreatment temperature, prior to adding the active phase and promoters, on Fischer-Tropsch activity and selectivity was explored. Four iron catalysts were prepared on silica-stabilized ...
    • The effects of individual metal contents on isochrones for C, N, O, Na, Mg, Al, Si, and Fe 

      Beom, Minje; Na, Chongsam; Ferguson, Jason W.; Kim, Yang-Seon (IOP Publishing, 2016-07-28)
      The individual characteristics of C, N, O, Na, Mg, Al, Si, and Fe on isochrones have been investigated in this study. Stellar models have been constructed for various mixtures in which the content of each element is changed ...
    • Efficient calculation of Schwarz-Christoffel transformations for multiply connected domains using Laurent series 

      DeLillo, Thomas K.; Elcrat, Alan R.; Kropf, Everett; Pfaltzgraff, J. A. (Heldermann Verlag, 2013-08)
      We discuss recently developed numerics for the Schwarz–Christoffel transformation for unbounded multiply connected domains. The original infinite product representation for the derivative of the mapping function is replaced ...
    • Elliptic Equations: Many Boundary Measurements 

      Isakov, Victor, 1947- (Springer, 2017)
      We consider the Dirichlet problem (4.0.1), (4.0.2). At first we assume that for any Dirichlet data g0 we are given the Neumann data g1; in other words, we know the results of all possible boundary measurements, or the ...
    • Elliptic equations: Single boundary measurements 

      Isakov, Victor, 1947- (Springer, 2017)
      In this chapter we consider the elliptic second-order differential equation Au=finΩ,f=f0−∑j=1n∂jfjAu=finΩ,f=f0−∑j=1n∂jfj with the Dirichlet boundary data u=g0on∂Ω.u=g0on∂Ω. We assume that A = div(−a∇) + b ⋅ ∇ + c ...
    • Enhanced thermal and dielectric performance in ternary $PVDF/PVP/Co_3O_4$ nanocomposites 

      Taha, T. A.; Mahmoud, Mohammed H.; Hamdeh, Hussein H. (Wiley, 2021-11-11)
      The main objective of this research was to prepare high thermal and dielectric performance $PVDF/PVP/Co_3O_4$ nanocomposites (PVDF, oply(vinylidene fluoride); PVP, polyvinylpyrrolidone) using the method of solution mixing. ...
    • Enhancement of the critical current density in FeO-coated MgB2 thin films at high magnetic fields 

      Surdu, Andrei E.; Hamdeh, Hussein H.; Al-Omari, Imaddin A.; Sellmyer, David J.; Socrovisciuc, Alexei V.; Prepelita, Andrei A.; Koparan, Ezgi T.; Yanmaz, Ekrem; Ryazanov, Valery V.; Hahn, Horst; Sidorenko, Anatolie S. (BEILSTEIN-INSTITUT, 2011-12-14)
      The effect of depositing FeO nanoparticles with a diameter of 10 nm onto the surface of MgB2 thin films on the critical current density was studied in comparison with the case of uncoated MgB2 thin films. We calculated the ...
    • Epileptic foci localization using the inverse source problem for Maxwell's equations 

      Kehler, Joshua Lee (Wichita State University, 2020-05)
      Consider an application of the inverse source problem for Maxwell's equations to the matter of epileptic foci localization in the human brain. Using a current dipole to model the epileptic focus in the brain, and by ...
    • Equilibrium configurations for a floating drop 

      Elcrat, Alan R.; Neel, Robert; Siegel, David (Birkhäuser-Verlag, Basel, 2004-12-01)
      If a drop of fluid of density ρ1 rests on the surface of a fluid of density ρ2 below a fluid of density ρ0, ρ0 < ρ1 < ρ2, the surface of the drop is made up of a sessile drop and an inverted sessile drop which match an ...
    • Equivalence testing for mean vectors of multivariate normal populations 

      Clarkson, Elizabeth P. (Wichita State University, 2010-05)
      This dissertation examines the problem of comparing samples of multivariate normal data from two populations and concluding whether the populations are equivalent; equivalence is defined as the distance between the mean ...