Browsing Department of Mathematics by Title
Now showing items 1010-1029 of 1088
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Total Variation Regularization of Matrix-Valued Images
(Peer reviewed; Journal article, 2007)We generalize the total variation restoration model, introduced by Rudin, Osher, and Fatemi in 1992, to matrix-valued data, in particular, to diffusion tensor images (DTIs). Our model is a natural extension of the color ... -
Toward personalized tinnitus treatment: An exploratory study based on internet crowdsensing
(Peer reviewed; Journal article, 2019-06-25)Introduction: Chronic tinnitus is a condition estimated to affect 10–15% of the population. No treatment has shown efficacy in randomized clinical trials to reliably and effectively suppress the phantom perceptions, and ... -
Towards an understanding of ramified extensions of structured ring spectra
(Journal article; Peer reviewed, 2020)We propose topological Hochschild homology as a tool for measuring ramification of maps of structured ring spectra. We determine second order topological Hochschild homology of the p-local integers. For the tamely ramified ... -
Towards hybrid two-phase modelling using linear domain decomposition
(Journal article; Peer reviewed, 2022)The viscous flow of two immiscible fluids in a porous medium on the Darcy scale is governed by a system of nonlinear parabolic equations. If infinite mobility of one phase can be assumed (e.g., in soil layers in contact ... -
Towards improved monitoring of offshore carbon storage: A real-world field experiment detecting a controlled sub-seafloor CO2 release
(Journal article; Peer reviewed, 2021)Carbon capture and storage (CCS) is a key technology to reduce carbon dioxide (CO2) emissions from industrial processes in a feasible, substantial, and timely manner. For geological CO2 storage to be safe, reliable, and ... -
Trade credit in Europe: Financial constraint and substitution effect in crisis times
(Journal article; Peer reviewed, 2023)This paper aims to prove whether financial rationing condition leads European enterprises to increase trade debt during the period 2008–2016 and whether companies offering deferred payments to customers obtain trade debt ... -
Transferring model structures to operads
(Master thesis, 2023-06-01)The thesis defines symmetric operads in some symmetric monoidal category, and gives sufficient conditions for there to be a model category structure on them. -
Trapping of dilute ion components in wells and double wells in higher equatorial magnetic regions: A kinetic theory including collisions, varying background and additional fields
(Department of Applied Mathematics report, Research report, 2001-08) -
Triangulations of polygons and stacked simplicial complexes: separating their Stanley–Reisner ideals
(Journal article; Peer reviewed, 2022)A triangulation of a polygon has an associated Stanley–Reisner ideal. We obtain a full algebraic and combinatorial understanding of these ideals and describe their separated models. More generally, we do this for stacked ... -
Trigonometric interpolation on lattice grids
(Peer reviewed; Journal article, 2015)In this paper we construct non-aliasing interpolation spaces and Lagrange functions for lattice grids. We argue that lattice grids are good for trigonometric interpolation and support this claim by numerical experiments. ... -
TV-Stokes And Its Variants For Image Processing
(Doctoral thesis, 2021-03-30)The total variational minimization with a Stokes constraint, also known as the TV-Stokes model, has been considered as one of the most successful models in image processing, especially in image restoration and sparse-data-based ... -
Two Level Additive Schwarz Preconditioner For Control Volume Finite Element Methods
(Master thesis, 2010-09-22)In this thesis we investigate nummerically the convergence properties of the control volume finite element method (CVFEM) preconditioned with a two level overlapping additive Schwarz method. Relevant theory regarding the ... -
Two phase flow including interfacial area as a variable
(Chapter, 2000)Based on the procedure of (Gray & Hassanizadeh 1998) we state macroscale conservation equations for multi phase flow in porous media including interfacial area as a variable. The phases we consider are a solid phase, a ... -
Two-level simulation of injection-induced fracture slip and wing-crack propagation in poroelastic media
(Journal article; Peer reviewed, 2022)In fractured poroelastic media under high differential stress, the shearing of pre-existing fractures and faults and propagation of wing cracks can be induced by fluid injection. This paper presents a two-dimensional ... -
Two-phase flow in porous media: dynamic capillarity and heterogeneous media
(Peer reviewed; Journal article, 2015-08-11)We investigate a two-phase porous media flow model, in which dynamic effects are taken into account in phase pressure difference. We consider a one-dimensional heterogeneous case, with two adjacent homogeneous blocks ... -
Two-scale preconditioning for two-phase nonlinear flows in porous media
(Peer reviewed; Journal article, 2015)Solving realistic problems related to flow in porous media to desired accuracy may be prohibitively expensive with available computing resources. Multiscale effects and nonlinearities in the governing equations are among ... -
A two-way nesting procedure for an ocean model with application to the Norwegian Sea.
(Department of Applied Mathematics report, Research report, 2000-11) -
Udvikling af elevers matematiske forståelse gennem helklassediskussion
(Journal article; Peer reviewed, 2021)I denne artikel vil jeg på baggrund af udvalgt litteratur og empiri diskutere og give eksempler på, hvordan en matematiklærer kan gennemføre en dialog på klassen. Klasserumsdialoger kritiseres ofte, og somme tider med god ... -
Ulrich bundles on a general blow-up of the plane
(Journal article; Peer reviewed, 2023)We prove that on X n , the plane blown-up at n very general points, there are Ulrich line bundles with respect to a line bundle corresponding to curves of degree m passing simply through the n blown-up points, with m ≤ 2√n ... -
Unconditionally stable Methods for Hamilton-Jacobi Equations
(Department of Applied Mathematics report, Research report, 2000-05)