Browsing Mathematics, Statistics, and Physics by Title
Now showing items 355-374 of 443
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Selected methods of matrix inversion
(Wichita State University, 1956-05)Matrix theory is concerned with the study of rectangular arrays of elements called matrices . In this paper, except for one example, no attempt will be made to describe how these arrays are obtained originally nor to ... -
Selection optimization of neutral current π⁰ production from an anti-neutrino interaction in the NOvA near detector
(Wichita State University, 2019-07)The NOvA experiment (NuMI Off-Axis e Appearance) is a particle physics experiment that is designed to measure neutrino oscillation parameters of muon neutrino (ν μ) to electron neutrino (ν e), or muon anti-neutrino ( ... -
Semi-inclusive neutral current neutral pion production selection at the NOvA (numi off-axis electron neutrino appearance) near detector using prong level convolutional neural networks
(Wichita State University, 2018-05)The NOνA neutrino experiment based in Fermilab is designed to measure νµ→νe neutrino oscillations. This experiment will give us insight into the properties of massive neutrinos. Neutral current (NC) νµ,e neutral pion ... -
Separation of track- and shower-like energy deposits in ProtoDUNE-SP using a convolutional neural network
(Springer Link, 2022-10-12)Liquid argon time projection chamber detector technology provides high spatial and calorimetric resolutions on the charged particles traversing liquid argon. As a result, the technology has been used in a number of recent ... -
Series representations and simulations of isotropic random fields in the Euclidean space
(American Mathematical Society, 2021-12-07)This paper introduces the series expansion for homogeneous, isotropic and mean square continuous random fields in the Euclidean space, which involves the Bessel function and the ultraspherical polynomial, but differs from ... -
Series representations of isotropic vector random fields on balls
(Elsevier, 2020-01)This paper deals with a class of second-order vector random fields in the unit ball of Rd, whose direct/cross covariances are invariant or isotropic with respect to a distance defined on the ball, and gives a series ... -
Simulations of protostellar collapse using multigroup radiation hydrodynamics II. The second collapse
(EDP Sciences S A, 2013-09)Context. Star formation begins with the gravitational collapse of a dense core inside a molecular cloud. As the collapse progresses, the centre of the core begins to heat up as it becomes optically thick. The temperature ... -
Singularity among selfsimilar Gaussian random fields with different scaling parameters and others
(Taylor & Francis, 2018-11-02)It is shown in this paper that the probability measures generated by selfsimilar Gaussian random fields are mutually singular, whenever they have different scaling parameters. So are those generated from a selfsimilar ... -
The size of the divergence points for rational maps
(Wichita State University. Graduate School., 2005-04-22) -
Some constructions of formally self-adjoint conformally covariant polydifferential operators
(Elsevier, 2022-03-10)We introduce the notion of formally self-adjoint conformally covariant polydifferential operators and give some constructions of families of such operators. In one direction, we show that any homogeneous conformally ... -
Some numerical methods
(Springer, 2017)In this chapter, we will briefly review some popular numerical methods widely used in practice. Of course it is not a comprehensive collection. We will demonstrate certain methods that are simple and widely used or, in our ... -
Some observations regarding steady laminar flows past bluff bodies
(Royal Society, 2014-07-28)Steady laminar flows past simple objects, such as a cylinder or a sphere, have been studied for well over a century. Theoretical, experimental and numerical methods have all contributed fundamentally towards our understanding ... -
Some remarks on constructive Yukawa theory in four dimensions
(Wichita State University, 2008-05)We have found an exact solution to the nonlinear Yukawa system in four dimensions, and used it to derive the time development of the system. Theorems are stated and proved regarding the essential self-adjointness of the ... -
The space of positive scalar curvature metrics on a manifold with boundary
(2014-11-12)We study the space of Riemannian metrics with positive scalar curvature on a compact manifold with boundary. These metrics extend a fixed boundary metric and take a product structure on a collar neighbourhood of the boundary. ... -
Spatial autoregression and related spatio-temporal models
(Elsevier Inc., 2004-01)We propose a spatial autoregressive randomfield of order p on the spatial domain Rd for pX2 in this paper, whose univariate margins are the continuous-time autoregression of order p on the real line, and introduce a class ... -
Spectra of unitary integral operators on L-2 (R) with kernels k(xy)
(World Scientific, 2013)Unitary integral transforms play an important role in mathematical physics. A primary example is the Fourier transform whose kernel is of the form k(x, y) = k(xy), i.e., of the product type. Here we consider the determination ... -
Spectral methods solution of the Navier-Stokes equations for steady viscous flows
(Wichita State University, 2009-05)A combination of Spectral Methods and Finite Differences will be used to solve the Navier-Stokes equations for a viscous flow past a circular cylinder and past symmetric Joukowski airfoils. Different discretizations of ... -
Spherically invariant vector random fields in space and time
(IEEE, 2011-12)This paper is concerned with spherically invariant or elliptically contoured vector random fields in space and/or time, which are formulated as scale mixtures of vector Gaussian random fields. While a spherically invariant ... -
A stability analysis of the harmonic continuation
(IOP PUBLISHING LTD, 2012-07)We consider the Cauchy problem for harmonic functions outside some disc in the plane with the Cauchy data on an interval. We obtain simple formulae for singular values of the operator solving this Cauchy problem and ... -
Stability and the inverse gravimetry problem with minimal data
(e Gruyter Open Ltd, 2020-10-11)The inverse problem in gravimetry is to find a domain ð • inside the reference domain ω from boundary measurements of gravitational force outside ω. We found that about five parameters of the unknown ð • can be stably ...