Now showing items 1-20 of 369

    • Torus actions, maximality, and non-negative curvature 

      Escher, Christine; Searle, Catherine (De Gruyter, 2021-09-03)
      Let $ℳ_0^n$ be the class of closed, simply connected, non-negatively curved Riemannian n-manifolds admitting an isometric, effective, isotropy-maximal torus action. We prove that if $M \in ℳ_0^n$ then M is equivariantly ...
    • Applied topological data analysis to El-Niño Southern Oscillation 

      Shirazbakhti, Ghazaleh (Wichita State University, 2021-07)
      The El Niño Southern Oscillation (ENSO) is one of the most powerful climate phenomena that can change global air circulation, affecting temperature and rainfall around the planet. ENSO has three phases: El Niño and La ...
    • Ricci tensor under conformal change of metric as an elementary obstruction to certain Einstein metrics 

      Shabo, Faiz (Wichita State University, 2021-07)
      Gregorio Ricci-Curbastro, (1853-1925) Bologna, was an Italian mathematician and a professor at the University of Padua from 1880 -1925. He was the rst to introduce the systematic theory of tensor analysis in 1887 with a ...
    • Positive (p, n)-intermediate scalar curvature and Gromov-Lawson cobordism 

      Burkemper, Matthew Bryan (Wichita State University, 2021-08)
      In this thesis we consider a well known construction due to Gromov, Lawson, and Gajer which allows for the extension of a metric of positive scalar curvature over the trace of a surgery in codimension at least 3 to a ...
    • A pseudo restricted maximum likelihood estimator under multivariate simple tree order restriction and an algorithm 

      Asfha, Huruy Debessay (Wichita State University, 2021-07)
      The minimum distance projection of a given matrix $X \in R^{pxq}$ onto the order restricted cone in an appropriately defined inner product system, $\pi(X|C_{pxq}),$ plays an important role in order restricted statistical ...
    • On the inverse gravimetry problem with minimal data 

      Titi, Aseel (Wichita State University, 2021-07)
      In this dissertation we considered the inverse source problem $\Delta u = \mu,$ where lim $u (x) = 0$ as |x| goes to $\infty$ and $\mu$ is zero outside a bounded domain $\Omega$. The inverse problem of gravime- try is to ...
    • Seasonal variation of multiple-muon cosmic ray air showers observed in the NOvA detector on the surface 

      Acero, Mario A.; Adamson, P.; Aliaga, Leo; Anfimov, Nikolay V.; Antoshkin, A.; Meyer, Holger; Muether, Mathew; Solomey, Nickolas (American Physical Society, 2021-07-30)
      We report the rate of cosmic ray air showers with multiplicities exceeding 15 muon tracks recorded in the NOvA Far Detector between May 2016 and May 2018. The detector is located on the surface under an overburden of 3.6 ...
    • Hyperbolic cosine ratio and hyperbolic sine ratio random fields 

      Ma, Chunsheng (Elsevier, 2021-12)
      This paper introduces several vector random fields whose finite-dimensional characteristic functions are of hyperbolic type, including generalized logistic, hyperbolic secant, hyperbolic tangent, hyperbolic cosine ratio, ...
    • Stellar modeling with low-temperature on-the-fly opacity 

      Buchele, Lynn (Wichita State University, 2021-05)
      Accurate stellar modeling requires using our understanding of phenomena far smaller than humans can observe to study some of the largest objects in the universe. One quantity that bridges this gap is the mean opacity, ...
    • Monte Carlo simulations of a space-based dark matter detector 

      Tripathi, Shrey (Wichita State University, 2021-05)
      It has been well established that a large percentage of the material in the universe is in an undiscovered form; Dark Matter. Most of this material is gravitationally condensed together as galaxies and clusters of galaxies. ...
    • 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 ...
    • K-combined random fields: Basic properties and stochastic orderings 

      Chen, Boming; Wang, Fangfang; Ma, Chunsheng (Taylor and Francis, 2021-05-17)
      This paper introduces the K-combined vector random field, whose finite-dimensional characteristic functions are made up of certain power functions and whose finite-dimensional density functions are comprised of the modified ...
    • Chronologically dating the early assembly of the Milky Way 

      Montalbán, Josefina; MacKereth, J. Ted; Miglio, Andrea; Vincenzo, Fiorenzo; Chiappini, Cristina; Buldgen, Gaël; Ferguson, Jason W. (Springer Nature, 2021-05-17)
      The standard cosmological model predicts that galaxies are built through hierarchical assembly on cosmological timescales$^{1,2}.$ The Milky Way, like other disk galaxies, underwent violent mergers and accretion of small ...
    • 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 ...
    • Qutrit-inspired fully self-supervised shallow quantum learning network for brain tumor segmentation 

      Konar, Debanjan; Bhattacharyya, Siddhartha; Panigrahi, Bijaya K.; Behrman, Elizabeth C. (Institute of Electrical and Electronics Engineers, 2021-05-13)
      Classical self-supervised networks suffer from convergence problems and reduced segmentation accuracy due to forceful termination. Qubits or bilevel quantum bits often describe quantum neural network models. In this article, ...
    • Prospects for beyond the Standard Model physics searches at the Deep Underground Neutrino Experiment: DUNE collaboration 

      Abi, B.; Acciarri, R.; Acero, Mario A.; Meyer, Holger; Muether, Mathew; Solomey, Nickolas (Springer Nature, 2021-04-16)
      The Deep Underground Neutrino Experiment (DUNE) will be a powerful tool for a variety of physics topics. The high-intensity proton beams provide a large neutrino flux, sampled by a near detector system consisting of a ...
    • Development, thermal and dielectric investigations of $PVDF-Y_2O_3$ polymer nanocomposite films 

      Taha, T. A.; Mahmoud, Mohamed H.; Hamdeh, Hussein H. (Springer, 2021-04-03)
      This work involves preparing $PVDF-Y_2O_3$ polymer nanocomposites to improve thermal and dielectric properties. X-ray diffraction, SEM, FTIR, TGA and dielectric measurements were applied for these films. The cubic crystal ...
    • Adjusting neutrino interaction models and evaluating uncertainties using NOvA near detector data 

      Acero, Mario A.; Adamson, Philip; Agam, G.; Meyer, Holger; Muether, Mathew; Solomey, Nickolas (EDP Sciences, 2020-12-04)
      The two-detector design of the NOvA neutrino oscillation experiment, in which two functionally identical detectors are exposed to an intense neutrino beam, aids in canceling leading order effects of cross-section uncertainties. ...
    • On the inverse gravimetry problem with minimal data 

      Titi, Aseel (Wichita State University, 2021-04-02)
      The inverse problem in gravimetry is to find a domain D inside the reference domain Ω from measurements of gravitational force outside Ω. We first considered the two-dimensional case where we found that about five parameters ...
    • Attenuation simulations and hardware design for the nuSol Space-based Neutrino Probe 

      Folkerts, Jonathan (Wichita State University, 2021-04-02)
      INTRODUCTION: The nuSol project aims to design, build, and launch a small payload which will perform several near-solar approaches in order to demonstrate the viability of a space-based neutrino detector and perform ...