• Fischer-Tropsch synthesis: effect of CO conversion on CH4 and oxygenate selectivities over precipitated Fe-K catalysts 

  Ma, Wenping; Shafer, Wilson D.; Jacobs, Gary; Yang, Jia; Sparks, Dennis E.; Hamdeh, Hussein H.; Davis, Burtron H. (Elsevier, 2018-06-25)

  The explanation for CH4 selectivity for iron based Fischer-Tropsch catalysts in the low conversion region (Le., < 50%) remains elusive. In this contribution, the CO conversion effect was carefully examined over four K ...

• 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 ...

• Peakedness and convex ordering for elliptically contoured random fields 

  Wang, Fangfang; Ma, Chunsheng (Elsevier, 2018-12)

  For the peakedness comparison between two Gaussian random fields about their mean functions, a necessary and sufficient condition is derived in this paper in terms of their covariance functions. interestingly, such a ...

• Optically thin core accretion: how planets get their gas in nearly gas-free discs 

  Lee, Eve J.; Chiang, Eugene; Ferguson, Jason W. (Oxford University Press, 2018-05-11)

  Models of core accretion assume that in the radiative zones of accreting gas envelopes, radiation diffuses. But super-Earths/sub-Neptunes (1-4 R-circle plus, 2-20M(circle plus)) point to formation conditions that are ...

• On increasing stability in the two dimensional inverse source scattering problem with many frequencies 

  Entekhabi, Mozhgan (Nora); Isakov, Victor, 1947- (IOP Publishing, 2018-03-29)

  In this paper, we will study the increasing stability in the inverse source problem for the Helmholtz equation in the plane when the source term is assumed to be compactly supported in a bounded domain O with a sufficiently ...

• Programming quantum annealing computers using machine learning 

  Behrman, Elizabeth C.; Steck, James E. (IEEE, 2017)

  Commercial quantum annealing (QA) machines are now being built with hundreds of quantum bits (qubits). These are used as analog computers, to solve optimization problems by annealing to an unknown ground state (the solution), ...

• A new test for decreasing mean residual lifetimes 

  Lorenzo, Edgardo; Malla, Ganesh B.; Mukerjee, Hari (Taylor & Francis, 2018-03-02)

  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. One model of aging is the decreasing mean residual life (DMRL): M is decreasing (non increasing) ...

• Monochromatic molecular absorption coefficients for use in calculations of stellar opacity 

  Ehrmann, Kari (Wichita State University, 2018-04-27)

  In order to fully understand stellar structure, it is necessary to know the opacity, as it influences the behavior of radiative transfer within the stellar interior. Opacity plays an important role in the onset of convection ...

• 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 ...

• Increasing stability in the inverse source problem with attenuation and many frequencies 

  Isakov, Victor, 1947-; Lu, Shuai (SIAM Publ., 2018)

  We study the interior inverse source problem for the Helmholtz equation from boundary Cauchy data of multiple wave numbers. The main goal of this paper is to understand the dependence of increasing stability on the ...

• Isotropic random fields with infinitely divisible marginal distributions 

  Wang, Fangfang; Leonenko, Nikolai; Ma, Chunsheng (Taylor & Francis, 2018)

  A simple but efficient approach is proposed in this paper to construct the isotropic random field in (d 2), whose univariate marginal distributions may be taken as any infinitely divisible distribution with finite variance. ...

• A generalization of ''Existence and behavior of the radial limits of a bounded capillary surface at a corner'' 

  Crenshaw, Julie N.; Echart, Alexandra K.; Lancaster, Kirk E. (Pacific Journal of Mathematics, 2018-02)

  The principal existence theorem (i.e., Theorem 1) of "Existence and behavior of the radial limits of a bounded capillary surface at a corner" (Pacific J. Math. 176:1 (1996), 165-194) is extended to the case of a contact ...

• A capillary surface with no radial limits 

  Mitchell, Colm Patric (Pacific Journal of Mathematics, 2018)

  In 1996, Kirk Lancaster and David Siegel investigated the existence and behavior of radial limits at a corner of the boundary of the domain of solutions of capillary and other prescribed mean curvature problems with contact ...

• A capillary surface with no radial limits 

  Mitchell, Colm Patric (Wichita State University, 2017-05)

  We begin by discussing the circumstances of capillary surfaces in regions with a corner, both concave and convex. These circumstances led to the (since proved) Concus-Finn Conjecture, which gives the requirements for a ...

• Unbiasedness of homogeneity test of normal mean vectors under multivariate order restrictions 

  Hamdan, Mustafa (Wichita State University, 2017-05)

  This dissertation considers homogeneity test for comparing multivariate normal populations with generalized order restricted alternative hypothesis. The framework in this dissertation presents a generalized multivariate ...

• Composite optimal control for interconnected singularly perturbed systems 

  Alghamdi, Saud A. (Wichita State University, 2017-05)

  This dissertation deals with the design of a decentralized control and estimators for large scale interconnected singularly perturbed stochastic systems for system stabilization and cost minimization. Singular perturbation ...

• Classification of simply connected cohomogeneity one manifolds in lower dimensions 

  Muzzy, Sara E. (Wichita State University, 2017-05)

  A cohomogeneity one manifold is a topological manifold with an effective topological action of a compact Lie group whose quotient is one dimensional. Cohomogeneity one manifolds were introduced by Mostert in 1957, however ...

• Torus actions on simply connected 4-manifolds 

  Harper, Mia B. (Wichita State University, 2017-05)

  In this paper, we study smooth effective actions of the 2-dimensional torus group T 2 ~= SO(2)xSO(2) on simply connected, closed 4-dimensional manifolds. Using the conical orbit space of the quotient, a cross-sectioning ...

• Preface -- Inverse Problems for Partial Differential Equations First Edition Preface 

  Isakov, Victor, 1947- (Springer, 2017)

  This book describes the contemporary state of the theory and some numerical aspects of inverse problems in partial differential equations. The topic is of substantial and growing interest for many scientists and engineers ...

• Preface -- Inverse Problems for Partial Differential Equations Second Edition Preface 

  Isakov, Victor, 1947- (Springer, 2017)

  In 8 years after the publication of the first version of this book, the rapidly progressing field of inverse problems witnessed changes and new developments. Parts of the book were used at several universities, and many ...

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