Now showing items 347-366 of 390

    • Strict Whitney arcs and t-quasi self-similar arcs 

      Wei, Xin (Wichita State University, 2018-05)
      A connected compact subset E of RN is said to be a strict Whitney set if there exists a real-valued C1 function f on RN with ∇f |E ≡ 0 such that f is constant on no non-empty relatively open subsets of E. We prove that ...
    • Structural analysis and cations distribution of nanocrystalline Ni1-xZnxFe1.7Ga0.3O4 

      Heiba, Zein K.; Mohamed, Mohamed Bakr; Hamdeh, Hussein H.; Ahmed, M. A. (Elsevier B.V., 2014-09-09)
      Nanostructured Ni1-xZnxFe1.7Ga0.3O4, with x = 0.0, 0.1, 0.2, 0.3, 0.4 and 0.5 were prepared by citrate method and were investigated using X-ray diffraction and Mossbauer spectroscopy. The structure characterized using X-ray ...
    • Student's t vector random fields with power-law and log-law decaying direct and cross covariances. 

      Ma, Chunsheng (Taylor & Francis, Inc, 2013-01-01)
      This article deals with the Student's t vector random field, which is formulated as a scale mixture of Gaussian vector random fields, and whose finite-dimensional distributions decay in power-law and have heavy tails. There ...
    • Study of Morin transition in hematite (a- Fe₂O₃) nanoparticles by Mössbauer spectroscopy 

      Halder, Sajib (Wichita State University, 2020-07)
      The change in magnetic properties of hematite (a- Fe₂O₃) nanoparticles were investigated by observing the change of Morin transition fraction at different temperatures. X-ray diffraction, transimission electron microscope ...
    • A study of particular coordinate systems 

      Ragan, Jennifer D. (Wichita State University, 2011-05)
      This thesis is a study of the properties and relationships between isothermal, harmonic and characteristic coordinate systems. The proof of the existence of isothermal and characteristic coordinates on a manifold which ...
    • Superconductivity and structural variation of the electron-correlated layer systems Sr(Pd1-xTx)(2)Ge-2 (T = Co, Ni, Rh; 0 <= x <= 1) 

      Wang, J.W.; Chen, I.A.; Hung, T.L.; You, Y.B.; Ku, H.C.; Hsu, Y.Y.; Ho, J. C.; Chen, Y.Y. (American Physical Society, 2012-01-31)
      Superconductivity variations deduced from the x-ray diffraction and the magnetic and heat-capacity measurements in the pseudoternary Sr(Pd1-xTx)(2)Ge-2 layer system [Pd(4d(8)), T = Co(3d(7)), Ni(3d(8)), or Rh(4d(7)); 0 <= ...
    • Superconvergence of discontinuous Galerkin method for linear hyperbolic equations 

      Rahmati, Sirvan (Wichita State University, 2020-12)
      This thesis is concerned with the investigation of the superconvergence of the Discontinuous Method for linear conservation laws. We use Fourier analysis to study the superconvergence of the semi-discrete discontinuous ...
    • Supernova neutrino burst detection with the deep underground neutrino experiment 

      Abi, B.; Acciarri, R.; Acero, Mario A.; Adamov, G.; Adams, Dean J.; Meyer, Holger; Muether, Mathew; Muetherer, M.; Solomey, Nickolas (Springer Nature, 2021-05-15)
      The Deep Underground Neutrino Experiment (DUNE), a 40-kton underground liquid argon time projection chamber experiment, will be sensitive to the electron-neutrino flavor component of the burst of neutrinos expected from ...
    • Supernova neutrino detection in NOvA 

      Meyer, Holger; Muether, Mathew; Solomey, Nickolas (IOP Publishing Ltd, 2020-10-05)
      The NOvA long-baseline neutrino experiment uses a pair of large, segmented, liquid-scintillator calorimeters to study neutrino oscillations, using GeV-scale neutrinos from the Fermilab NuMI beam. These detectors are also ...
    • Synthesis of highly ordered 30 nm NiFe2O4 particles by the microwave-combustion method 

      Mahmoud, Mohamed H.; Elshahawy, A. M.; Makhlouf, Salah A.; Hamdeh, Hussein H. (Elsevier B.V., 2014-11)
      NiFe2O4 of 30 nm average size was synthesized by microwave combustion and subsequent solid state reaction at 1273 K. The materials were characterized by X-ray diffraction, TEM, vibrating sample magnetometery and Mossbauer ...
    • Testing holomorphy on curves 

      Fridman, Buma L.; Ma, Daowei (Springer, 2012-11)
      For a domain D aS, a"e (n) we construct a continuous foliation of D into one-real-dimensional curves such that any function f a C (1)(D) which can be extended holomorphically into some neighborhood of each curve in the ...
    • Testing homogeneity of a parameter matrix some of the rows of which are under synchronized order restrictions 

      Banerjee, Arijit (Wichita State University, 2011-12)
      This research considers a multiple multivariate linear regression model with a parameter matrix some of the rows of which are constrained by synchronized order restrictions. The test on the homogeneity of the parameter ...
    • Testing homogeneity of a parameter matrix with some rows constrained by synchronized order restrictions 

      Banerjee, Arijit (Wichita State University. Graduate School, 2010-04-23)
      A multivariate linear regression model Y~N (βM',Σ) is considered where some of the rows in the coefficient matrix β are constrained by synchronized order restrictions. A test scheme is derived for the homogeneity of the ...
    • The effect of small time delays on large-scale systems 

      Almutairi, Shahah (Wichita State University, 2018-12)
      In this research, model reduction techniques are used to design optimal control strategies with low sensitivity in order to model uncertainty. The source of uncertainty encountered is the time delay, and the reduced-order ...
    • The Hopf Conjecture with abelian symmetries 

      Chan, Jacqueline (Wichita State University, 2021-05)
      The Hopf Conjecture states that for closed, orietable, even-dimensional manifolds, the Euler characteristic is strictly positive. Results due independently to P uttmann and Searle [13] and Rong [14], and due to Rong and ...
    • The NOvA far detector data acquisition system 

      Biery, Kurt; Guglielmo, Gerald; Habig, Alec; Illingworth, Robert; Kasahara, Susan; Meyer, Holger; Kwarciany, Rick; Lu, Qiming; Lukhanin, Gennadiy; Magill, Stephen; Mathis, Mark; Moren, Adam; Mualem, Leon; Muether, Mathew; Norman, Andrew; Paley, Jonathan; Perevalov, Denis; Piccoli, Luciano; Rechenmacher, Ronald; Shanahan, Peter; Suter, Louise; Waldron, Abigail; Zalesak, Jaroslav (2014)
      Biery, Kurt, et al. "The NOvA Far Detector Data Acquisition System." Journal of Physics: Conference Series 513 no 1. doi:10.1088/1742-6596/513/1/012041.
    • The system $x^n + y^n = naxy, a>0$ 

      Dawson, Charles L. (Wichita State University, 1933-05)
    • Theoretical results in inverse problems for size, solvability, and uniqueness in the p-n junction and doping profile of semiconductors 

      Myers, Joseph Kenneth (2006-05)
      We present an overview of mathematical models for electrons and holes in semiconductors. We use these to pose some inverse problems for determining the doping profile of a semiconductor. We establish the solvability of ...
    • A three-dimensional inverse gravimetry problem for ice with snow caps 

      Isakov, Victor, 1947-; Leung, Shingyu; Qian, Jianliang (American Institute of Mathematical Sciences, 2013-05)
      We propose a model for the gravitational field of a floating iceberg D with snow on its top. The inverse problem of interest in geophysics is to find D and snow thickness g on its known (visible) top from remote measurements ...
    • Time varying isotropic vector random fields on sphere 

      Ma, Chunsheng (Springer, 2017-12)
      For a vector random field that is isotropic and mean square continuous on a sphere and stationary on a temporal domain, this paper derives a general form of its covariance matrix function and provides a series representation ...