Now showing items 68-87 of 410

    • Covariance matrices for second-order vector random fields in space and time 

      Ma, Chunsheng (IEEE, 2011-05-01)
      This paper deals with vector (or multivariate) random fields in space and/or time with second-order moments, for which a framework is needed for specifying not only the properties of each component but also the possible ...
    • Covariance matrix functions of isotropic vector random fields 

      Wang, Renxiang; Du, Juan; Ma, Chunsheng (Taylor & Francis Group, 2014-05-15)
      An isotropic scalar or vector random field is a second-order random field in (d > 2), whose covariance function or direct/cross covariance functions are isotropic. While isotropic scalar random fields have been well developed ...
    • Covariance structures of Gaussian and log-Gaussian vector stochastic processes 

      Metheny, Maryssa (Wichita State University, 2012-12)
      Although the covariance structures of univariate Gaussian and log Gaussian stochastic processes have been extensively studied in the past few decades, the development of covariance structures for Gaussian and log-Gaussian ...
    • Coverage probability of tolerance levels 

      Lann-Wolcott, Matthew (Wichita State University, 2018-12)
      In this thesis the ideas of the tolerance limit and coverage probabilities are explored in the context of the A-basis and B-basis for composite materials. The breaking strength of composite materials are random variables ...
    • 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, Adam.; Abi, B.; Acciarri, R.; Meyer, Holger; Muether, Mathew; 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 ...
    • Elementary applications of matrices 

      Hatfield, Dean A. (Wichita State University, 1948-07)
      This treatise is concerned principally with the fundamental properties of matrices, the basic operations which may be performed with them, and some of their applications to algebra, analytic geometry, and differential ...
    • Elliptic Equations: Many Boundary Measurements 

      Isakov, Victor (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 (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 ...