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  • A comparison of some numerical conformal mapping methods for simply and multiply connected domains 

    Badreddine, Mohamed (Wichita State University, 2016-05)
    This dissertation compares several methods for computing conformal maps from sim-ply and multiply connected domains bounded by circles to target domains bounded by smooth curves and curves with corners. We discuss the use ...
  • Ages of 70 dwarfs of three populations in the solar neighborhood: considering O and C abundances in stellar models 

    Ge, Z. S.; Bi, S. L.; Chen, Y. Q.; Li, T. D.; Zhao, J. K.; Liu, K.; Ferguson, Jason W.; Wu, Y. Q. (IOP Publishing Ltd, 2016-12-15)
    Oxygen and carbon are important elements in stellar populations. Their behavior refers to the formation history of the stellar populations. C and O abundances would also obviously influence stellar opacities and the overall ...
  • Recovery of time-dependent volatility in option pricing model 

    Deng, Zui-Cha; Hon, Y. C.; Isakov, Victor, 1947- (IOP Publishing Ltd, 2016-09-29)
    In this paper we investigate an inverse problem of determining the time-dependent volatility from observed market prices of options with different strikes. Due to the non linearity and sparsity of observations, an analytical ...
  • 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, Y. -C. (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 ...
  • Fischer-Tropsch synthesis: effect of Cu, Mn and Zn addition on activity and product selectivity of cobalt ferrite 

    Gnanamani, Muthu Kumaran; Hamdeh, Hussein H.; Jacobs, Gary; Qian, Dali; Liu, Fang; Hopps, Shelley D.; Thomas, Gerald A.; Shafer, Wilson D.; Xiao, Qunfeng; Hu, Yongfeng; Davis, Burtron H. (Royal Society of Chemistry, 2016)
    The effect of Cu, Mn and Zn addition on cobalt ferrite was investigated for Fischer-Tropsch synthesis (FTS). Oxalate co-precipitation followed by decomposition under inert conditions was used to obtain various metal ...
  • Radial limits of bounded nonparametric prescribed mean curvature surfaces 

    Entekhabi, Mozhgan (Nora); Lancaster, Kirk E. (Pacific Journal of Mathematics, 2016-06-22)
    Consider a solution f is an element of C-2 (Omega)of a prescribed mean curvature equation div del f/root 1+vertical bar del f vertical bar(2) = 2H(x, f) in Omega, where Omega subset of R-2 is a domain whose boundary ...
  • Linear stability of Hill's vortex to axisymmetric perturbations 

    Protas, Bartosz; Elcrat, Alan R. (Cambridge University Press, 2016-07)
    We consider the linear stability of Hill's vortex with respect to axisymmetric perturbations. Given that Hill's vortex is a solution of a free-boundary problem, this stability analysis is performed by applying methods of ...
  • Numerical methods for Riemann-Hilbert problems in multiply connected circle domains 

    Balu, Raja; DeLillo, Thomas K. (Elsevier Science Inc., 2016-12-01)
    Riemann-Hilbert problems in multiply connected domains arise in a number of applications, such as the computation of conformal maps. As an example here, we consider a linear problem for computing the conformal map from the ...
  • Isotropic covariance matrix polynomials on spheres 

    Ma, Chunsheng (Taylor & Francis Group, 2016)
    This article characterizes the covariance matrix function of a Gaussian or elliptically contoured vector random field that is stationary, isotropic, and mean square continuous on the sphere. By applying the characterization ...
  • Construction industrial multivariate statistical analysis based on real estate market in USA 

    Wang, Lei (Wichita State University, 2016-04-29)
    This project mainly focus on how the land market value, in terms of GDP, CPI, construction cost index and unemployment rate, inflation rate, population and purchasing manage index, enables a relationship with the real ...
  • Stochastic representations of isotropic vector random fields on spheres 

    Ma, Chunsheng (Taylor & Francis Group, 2016)
    A stochastic representation is derived for a vector random field that is stationary, isotropic, and mean square continuous on a sphere or unit circle. The established stochastic representation is an infinite series involving ...
  • Nilsolitons of H-type in the Lorentzian setting 

    Onda, Kensuke (Houston Journal of Mathematics, 2015)
    It is known that all left-invariant pseudo-Riemannian metrics on the three-dimensional Heisenberg group H-3 are algebraic Ricci solitons. We consider generalizations of Riemannian H-type, namely pseudoH-type and pH-type. ...
  • On the relationship of continuity and boundary regularity in prescribed mean curvature dirichlet problems 

    Lancaster, Kirk E.; Melin, Jaron Patric (Pacific Journal of Mathematics, 2016-03-03)
    In 1976, Leon Simon showed that if a compact subset of the boundary of a domain is smooth and has negative mean curvature, then the nonparametric least area problem with Lipschitz continuous Dirichlet boundary data has a ...
  • Increasing stability in the inverse problem for the Schrödinger equation 

    Liang, Li (Wichita State University, 2015-12)
    The Schrödinger equation is a partial differential equation that describes how the quantum state of a physical system changes with time. It was formulated in late 1925 by the Austrian physicist Erwin Schrödinger. The study ...
  • Hybrid basis scheme for computing electrostatic fields exterior to close-to-touching discs 

    Crowdy, D. G.; Tanveer, S.; DeLillo, Thomas K. (Oxford University Press, 2016-04)
    This paper presents a simple and effective new numerical scheme for the computation of electrostatic fields exterior to a collection of close-to-touching discs. The method is presented in detail for the two-disc case. The ...
  • 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). ...
  • First measurement of muon-neutrino disappearance in NOvA 

    NOvA Collaboration; Meyer, Holger; Muether, Mathew; Solomey, Nickolas (American Physical Society, 2016-03-25)
    This paper reports the first measurement using the NOvA detectors of nu(mu) disappearance in a nu(mu) beam. The analysis uses a 14 kton-equivalent exposure of 2.74 x 10(20) protons-on-target from the Fermilab NuMI beam. ...
  • First measurement of electron neutrino appearance in NOvA 

    Meyer, Holger; Muether, Mathew; Solomey, Nickolas (American Physical Society, 2016-04-13)
    We report results from the first search for nu(mu) -> nu(e) transitions by the NOvA experiment. In an exposure equivalent to 2.74 x 10(20) protons on target in the upgraded NuMI beam at Fermilab, we observe 6 events in the ...
  • Protostellar collapse using multigroup radiation hydrodynamics 

    Vaytet, Neil; Chabrier, Gilles; Audit, Edouard; Commercon, Benoit; Masson, Jacques; Gonzalez, Matthias; Ferguson, Jason W.; Delahaye, Franck (Astronomical Society of the Pacific, 2015)
    Many simulations of protostellar collapse make use of a grey treatment of radiative transfer coupled to the hydrodynamics. However, interstellar gas and dust opacities present large variations as a function of frequency. ...
  • Increasing stability for the conductivity and attenuation coefficients 

    Isakov, Victor, 1947-; Lai, Ru-Yu; Wang, Jenn-Nan (Society for Industrial and Applied Mathematics, 2016)
    In this work we consider stability of recovery of the conductivity and attenuation coefficients of the stationary Maxwell and Schrodinger equations from a complete set of (Cauchy) boundary data. By using complex geometrical ...

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