Now showing items 6-25 of 188

  • Carleman estimates and applications to inverse problems 

    Isakov, Victor, 1947- (Birkhäuser Verlag Basel/Switzerland, 2004)
    This review paper describes some general and recent results of possible interest for mathematicians studying or using uniqueness of the continuation or working on control theory or inverse problems for partial ...
  • The Carleman formula and recovering the refractive index of the two-dimensional Helmholtz equation 

    Arbuzov, E. V.; Bukhgeim, A. A.; Bukhgeym, Alexander L. (2008)
    We consider the Cauchy problem for the Helmholtz equation with given bounded refrac- tive index in an arbitrary planar domain with Cauchy data only on part of the boundary of the domain. We derive a Carleman-type formula ...
  • The Carleman formula for the Hemholtz equation on the plane 

    Arbuzov, E. V.; Bukhgeym, Alexander L. (Springer Science+Business Media, Inc., 2006)
    We consider the Cauchy problem for the Helmholtz equation in an arbitrary bounded planar domain with Cauchy data only on part of the boundary of the domain. We derive a Carleman-type formula for a solution to this problem ...
  • Cation distribution and dielectric properties of nanocrystalline gallium substituted nickel ferrite 

    Heiba, Zein K.; Mohamed, Mohamed Bakr; Ahmed, M. A.; Moussa, M. A. A.; Hamdeh, Hussein H. (Elsevier B.V., 2014-02-16)
    Nano crystalline NiFe2−xGaxO4, 0.0 ⩽ x ⩽ 1 ferrite was prepared by citrate method. The structural and micro structural evolutions of the nanophase have been studied using X-ray powder diffraction and the Rietveld method. ...
  • CMC capillary surfaces at reentrant corners 

    Athanassenas, Maria; Lancaster, Kirk E. (Pacific Journal of Mathematics at the University of California, 2008-02)
    For a capillary graph in a vertical cylinder × R R3, the existence of a reentrant corner P 2 @ makes the determination of the continuity at P (or the behavior of the radial limits at P) of the solution problematic. ...
  • Cobordism invariance of the homotopy type of the space of positive scalar curvature metrics 

    Walsh, Mark (American Mathematical Society, 2013-07)
    Let X and Y be a pair of smooth manifolds, each obtainable from the other by surgery in codimension at least three. We show that the corresponding spaces Riem(+)(X) and Riem(+)(Y), respectively consisting of Riemannian ...
  • Combinatorial input recognition algorithm Internet applications to HTTP web servers 

    Myers, Joseph Kenneth (Wichita State University. Graduate School., 2007-04-27)
    We introduce an algorithm for the classical recognition problem of identifying elements s within a class of strings S = {s1, s2, ..., sn}. Here it is assumed that struct s = { char *a; int z; }; and that for two strings ...
  • A computing method for multivariate isotonic regression 

    Traore, Ye Emma (Wichita State University, 2010-12)
  • Conformal deformation of a conic metric 

    Jones, Miranda Rose (Wichita State University, 2011-05)
    The problem studied here focuses on a compact manifold M without boundary in which the Riemannian metric g is on Λ = M – {p1, p2,…,pκ}. Near the pi 's, g has a particular type of singularity in which locally M = (0, δ)x ...
  • Conjectures in inverse boundary value problems for quasilinear elliptic equations 

    Sun, Ziqi (Department of Mathematics of the Universidad de la Frontera Temuco-Chile and the Department of Mathematics of the Universidade Federal de Pernambuco, Recife-Brazil, 2005-12)
    Inverse boundary value problems originated in early 80’s, from the contribution of A.P. Calderon on the inverse conductivity problem [C], in which one attempts to recover the electrical conductivity of a body by means ...
  • Conjugate loci of pseudo-Riemannian 2-step nilpotent Lie groups with nondegenerate center 

    Jang, Changrim; Parker, Phillip E. (Springer, 2005)
    We determine the complete conjugate locus along all geodesics parallel or perpendicular to the center (Theorem 2.3). When the center is one-dimensional we obtain formulas in all cases (Theorem 2.5), and when a certain ...
  • Consistent estimation of distributions with type II bias with applications in competing 

    El Barmi, Hammou; Mukerjee, Hari (Institute of Mathematical Statistics, 2004-02)
    A random variable X is symmetric about 0 if X and -X have the same distribution. There is a large literature on the estimation of a distribution function (DF) under the symmetry restriction and tests for checking this ...
  • Constrained pole placement by linear quadratic modification 

    Rousan, N. S.; Sawan, M. Edwin (IEEE, 1991-06-26)
    A noniterative method is introduced that will enable the designer to find an optmal one step state feedback controller. The controller will place the eigenvalues of the closed loop system in a specified disk.
  • Construction and solution of an inverse problem posed by "Piekara’s Chair" 

    Callahan, Daniel (Wichita State University, 2008-05)
    The article "Piekara's Chair: Mechanical Model for Atomic Energy Levels" by Zofia Golab-Meyer presents a model of the real-world problem of determining classical energy states suitable for high school or undergraduate ...
  • A convergent algorithm for a generalized multivariate isotonic regression problem 

    Hansohm, Juergen; Hu, Xiaomi (Springer, 2012-02)
    Sasabuchi et al. (Biometrika 70(2):465-472, 1983) introduces a multivariate version of the well-known univariate isotonic regression which plays a key role in the field of statistical inference under order restrictions. ...
  • Convex configurations for solutions to semilinear elliptic problems in convex rings 

    Acker, Andrew; Poghosyan, Mikayel; Shahgholian, Henrik (Taylor & Francis Group, LLC, 2006-05)
    For a given convex ring and an L 1 function f:Ω × → + we show, under suitable assumptions on f, that there exists a solution (in the weak sense) to with {x Ω: u(x) > s} Ω1 convex, for all s (0, M).
  • Covariance matrices for second-order vector random fields in space and time 

    Ma, Chunsheng (IEEE, 2011-05-01)
    This paper deals with vector (or multivariate) random fields in space and/or time with second-order moments, for which a framework is needed for specifying not only the properties of each component but also the possible ...
  • Covariance matrix functions of isotropic vector random fields 

    Wang, Renxiang; Du, Juan; Ma, Chunsheng (Taylor & Francis Group, 2014-05-15)
    An isotropic scalar or vector random field is a second-order random field in (d > 2), whose covariance function or direct/cross covariance functions are isotropic. While isotropic scalar random fields have been well developed ...
  • Covariance structures of Gaussian and log-Gaussian vector stochastic processes 

    Metheny, Maryssa (Wichita State University, 2012-12)
    Although the covariance structures of univariate Gaussian and log Gaussian stochastic processes have been extensively studied in the past few decades, the development of covariance structures for Gaussian and log-Gaussian ...
  • Crack detection in a three dimensional body 

    Redpath, Steven F. (2006-05)
    We propose a method of analyzing a crack in a three dimensional body. We treat the problem as an inverse problem and apply Green’s Theorem, Trace Theorem, and the Fredholm Alternative. We model the problem using Helmholtz ...