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  • 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 ...
  • On an ad hoc test for order restricted multivariate normal means 

    Hu, Xiaomi (Taylor & Francis Group, 2016)
    For several normal mean vectors restricted by a simple ordering with respect to a multivariate order, this article derives sufficient and necessary conditions for the restricted MLEs for both mean vectors and covariance ...
  • Hydrogenation of Carbon Dioxide over Co-Fe Bimetallic Catalysts 

    Gnanamani, Muthu Kumaran; Jacobs, Gary; Hamdeh, Hussein H.; Shafer, Wilson D.; Liu, Fang; Hopps, Shelley D.; Thomas, Gerald A.; Davis, Burtron H. (American Chemical Society, 2016-02)
    A series of Co-Fe bimetallic catalysts was prepared, characterized, and studied for the hydrogenation of carbon dioxide. The catalyst precursors were prepared via an oxalate coprecipitation method. Monometallic (Co or Fe) ...
  • Increasing stability in the inverse source problem with many frequencies 

    Cheng, Jin; Isakov, Victor, 1947-; Lu, Shuai (Elsevier B.V., 2016-03-05)
    We study increasing stability in the interior inverse source problem for the Helmholtz equation from boundary Cauchy data for multiple wave numbers. By using the Fourier transform with respect to the wave number, explicit ...
  • Consistent estimation of survival functions under uniform stochastic ordering; the k-sample case 

    El Barmi, Hammou; Mukerjee, Hari (Elsevier B.V., 2016-02)
    Let S-1, S-2, ... , S-k be survival functions of life distributions. They are said to be uniformly stochastically ordered, S-1 <=(uso) S-2 <=(uso) ... <=(uso) S-k, if S-i/Si+1 is a survival function for 1 <= i <= k - 1. ...
  • Kahler-Einstein metrics with edge singularities 

    Jeffres, Thalia D.; Mazzeo, Rafe; Rubinstein, Yanir A. (Princeton University, 2016-01)
    This article considers the existence and regularity of Kahler Einstein metrics on a compact Kahler manifold M with edge singularities with cone angle 2 pi beta along a smooth divisor D. We prove existence of such metrics ...
  • A new test for new better than used in expectation lifetimes 

    Lorenzo, Edgardo; Malla, Ganesh B.; Mukerjee, Hari (Taylor & Francis Group, 2015)
    The mean residual life of a non negative random variable X with a finite mean is defined by M(t) = E[X - t | X > t] for t >= 0. A popular nonparametric model of aging is new better than used in expectation (NBUE), when ...
  • Regularization via Cheeger deformations 

    Searle, Catherine; Solorzano, Pedro; Wilhelm, Frederick (Springer Netherlands, 2015-12)
    We show that Cheeger deformations regularize G-invariant metrics in a very strong sense.
  • Increasing stability for near field from the scattering amplitude 

    Isakov, Victor, 1947- (American Mathematical Society, 2015)
    We obtain stability estimates for the near field of a radiating solution of the Helmholtz equation from the far field (scattering amplitude). This estimates contain the best possible Lipschitz term, a Holder term, and terms ...
  • Pellet ablation in Tokamak reactors 

    Rinker, Patrick (Wichita State University, 2015-07)
    We implemented a rotational cloud model for the simulation of pellet ablation in a Tokamak reactor. We have shown that the ablation rate in the rotational cloud model converges quickly to a steady state value independent ...
  • A multiple decision procedure for testing with ordered alternatives 

    Echart, Alexandra Kathleen (Wichita State University, 2015-07)
    In testing hypotheses with ordered alternatives, the conclusion of an order restriction when rejecting the null hypothesis is very sensitive to the correctness of the assumed model. In other words, when the null hypothesis ...
  • Modules for the investigation of the central fan question through numerical computation 

    Nguyen, Francis Le (Wichita State University, 2015-05)
    In this thesis, we continue the research of investigating the central fan question through numerical computation of minimal surfaces and the author develops a new conformal map in hopes of producing a more accurate and ...
  • How to lift positive Ricci curvature 

    Searle, Catherine; Wilhelm, Frederick (Mathematical Sciences Publishers, 2015-05-21)
    We show how to lift positive Ricci and almost nonnegative curvatures from an orbit space M / G to the corresponding G-manifold, M. We apply the results to get new examples of Riemannian manifolds that satisfy both curvature ...
  • Role of Cu2+ substitution on the structural and magnetic properties of Ni-ferrite nanoparticles synthesized by the microwave-combustion method 

    Elshahawy, A. M.; Mahmoud, Mohamed H.; Makhlouf, Salah A.; Hamdeh, Hussein H. (Elsevier B.V., 2015-11)
    Ni1-xCuxFe2O4 (x=0.00, 0.05, 0.10, 0.15, 0.20 and 0.25) nanoparticles were successfully synthesized by microwave-induced combustion process using urea as fuel. The structural and magnetic properties of the samples were ...

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