Now showing items 218-237 of 395

    • Neutrino detector design, attenuation studies, and testing for the νSol project 

      Folkerts, Jonathan (Wichita State University, 2020-05)
      In order to further work on the Sol project funded through a NASA Phase II NIAC grant, I have performed detailed simulations on the effect of attenuation length on the performance of the Sol solar neutrino probe using ...
    • Neutrino interaction classification with a convolutional neural network in the DUNE far detector 

      Abi, B.; Acciarri, R.; Acero, Mario A.; Muether, Mathew; Meyer, Holger; Solomey, Nickolas (American Physical Society, 2020-11-09)
      The Deep Underground Neutrino Experiment is a next-generation neutrino oscillation experiment that aims to measure CP-violation in the neutrino sector as part of a wider physics program. A deep learning approach based on ...
    • New constraints on oscillation parameters from $ν_e$ appearance and $ν_μ$ disappearance in the NOvA experiment 

      Cedeno, Alan J.; Meyer, Holger; Muether, Mathew; Solomey, Nickolas (American Physical Society, 2018-08-24)
      We present updated results from the NOvA experiment for $\nu_\mu\rightarrow\nu_\mu$ and $\nu_\mu\rightarrow\nu_e$ oscillations from an exposure of $8.85\times10^{20}$ protons on target, which represents an increase of 46% ...
    • 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) ...
    • 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 ...
    • 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. ...
    • Non-negatively curved 6-manifolds with almost maximal symmetry rank 

      Escher, Christine; Searle, Catherine (Springer Nature, 2019-01)
      We classify closed, simply connected, non-negatively curved 6-manifolds of almost maximal symmetry rank up to equivariant diffeomorphism.
    • Numerical comparison of negative damping bounds in a specified domain when the wave speed varies 

      Najafi, M.; Sarhangi, G.R.; Sawan, M. Edwin (IEEE, 1992-06-24)
      The energy decay of a self-excited wave equation utt - c2 ¿ u - P(x)ut = 0 is studied where the wave speed c is greater than one, P(x) ¿ 0, and P(x) L¿(¿), ¿ ¿ ¿ Rn. Moreover, the relationship between two bounds for ...
    • Numerical computation of Schwarz-Christoffel transformations and slit maps for multiply connected domains 

      Kropf, Everett (Wichita State University, 2012-05)
      Two methods for the numerical conformal mapping of domains with m < ∞ separated circular holes to domains with m polygonal holes are presented; bounded and unbounded domains are both considered. The methods are based on ...
    • 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 ...
    • Numerical methods for Riemann-Hilbert problems in multiply connected circle domains 

      Balu, Raja (Wichita State University, 2020-05)
      Riemann-Hilbert problems are problems for determining functions analytic in a given domain with speci ed values on the boundary. Since the real and imaginary parts of an analytic function are related by the Cauchy-Riemann ...
    • NuSol neutrino detector prototypes: An analysis of the efficiency and backgrounds of the detectors 

      Doty, Brian (Wichita State University, 2021-12)
      The NuSol project aims to orbit a satellite fitted with a gallium-doped scintillator within 10 solar radii of the sun on closest approach. The advantage of the close proximity to the sun is a much higher flux of neutrinos ...
    • Observation of seasonal variation of atmospheric multiple-muon events in the NOvA Near Detector 

      Cedeno, Alan J.; Meyer, Holger; Solomey, Nickolas; Altakarli, Sef (American Physical Society, 2019-06-28)
      Using two years of data from the NOvA Near Detector at Fermilab, we report a seasonal variation of cosmic ray induced multiple-muon $(N\mu\ge2)$ event rates which has an opposite phase to the seasonal variation in the ...
    • 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 ...
    • On convergence sets of divergent power series 

      Fridman, Buma L.; Ma, Daowei; Neelon, Tejinder S. (Polish Academy of Sciences Institute of Mathematics, 2012)
      A nonlinear generalization of convergence sets of formal power series, in the sense of Abhyankar-Moh [J. Reine Angew. Math. 241 (1970)], is introduced. Given a family y = phi(s)(t, x) = sb(1)(x)t + b(2)(x)t(2) + ... of ...
    • On convergence sets of formal power series 

      Al-Shutnawi, Basma (Wichita State University, 2013-12)
      In this thesis we consider the convergence sets of formal power series of the form f(z, t)=sigma infinity j=0 pj(z)tj, where pj(z) are polynomials. A subset E of the complex plane C is said to be a convergence set if there ...
    • On cusp solutions to a prescribed mean curvature equation 

      Echart, Alexandra K.; Lancaster, Kirk E. (Pacific Journal of Mathematics, 2017-05)
      The nonexistence of "cusp solutions" of prescribed mean curvature boundary value problems in Omega x R when Omega is a domain in R-2 is proven in certain cases and an application to radial limits at a corner is mentioned.
    • On determining sets for holomorphic automorphisms 

      Fridman, Buma L.; Kim, Kang-Tae; Krantz, Steven G.; Ma, Daowei (Rocky Mountain Mathematics Consortium, 2006-01-14)
      We study sets K in the closure of a domain D Cn such that, if an automorphism ' of D fixes each point of K, then ' is the identity mapping. A separate result is proved for the case that K lies entirely in the boundary of D.
    • On increased stability in the continuation of the Helmholtz equation 

      Aralumallige, Deepak; Isakov, Victor, 1947- (IOP Publishing, 2007-08)
      In this paper, we give analytical and numerical evidence of increasing stability in the Cauchy problem for the Helmholtz equation in the whole domain when frequency is growing. This effect depends upon the convexity ...
    • 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 ...