Browsing Department of Mathematics by Title
Now showing items 478-497 of 934
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Modelling clusters of corporate defaults: Regime-switching models significantly reduce the contagion source
(Journal article; Peer reviewed, 2022)In this paper, we report robust evidence that the process of corporate defaults is time-dependent and can be modelled by extending an autoregressive count time series model class via the introduction of regime-switching. ... -
Modelling Fluid Flow and Heat Transport in Fractured Porous Media
(Master thesis, 2013-08-27)Flow in porous media is an important and well- researched topic in both academia and the industry. More accurate mathematical models are constantly sought after. Fractures in a porous medium can be an important contributor ... -
Modelling Geomechanical Impact of CO2 Injection Using Precomputed Response Functions
(Chapter; Peer reviewed, 2016)When injecting CO2 or other fluids into a geological formation, pressure plays an important role both as a driver of flow and as a risk factor for mechanical integrity. The full effect of geomechanics on aquifer flow can ... -
Modelling memory decay after injuries using household survey data from Khartoum State, Sudan
(Peer reviewed; Journal article, 2018-06-20)Background Injuries represent an important cause of morbidity and mortality worldwide. In retrospective epidemiological studies, estimated rates of reported injuries often decline considerably when information is included ... -
Modelling memory decay after injuries using household survey data from Khartoum State, Sudan
(Peer reviewed; Journal article, 2018-06-20)Background: Injuries represent an important cause of morbidity and mortality worldwide. In retrospective epidemiological studies, estimated rates of reported injuries often decline considerably when information is included ... -
Modelling of the Shear Dilation Based Hydraulic Stimulation in Enhanced Geothermal Systems Considering Fractures in Different Scales
(Conference lecture, 2016-09)A numerical approach for modelling of shear dilation of existing fractures in hydraulic stimulation of geothermal reservoirs at low elevated pressures is presented. The fractured rock in the reservoir is modelled as a ... -
Modelling of Three-Phase Flow Functions for Applications in Enhanced Oil Recovery
(Doctoral thesis, 2009-05-22) -
Modelling the non-Hydrostatic Pressure in σ-coordinate Ocean Models
(Master thesis, 2006-09-22) -
Models for CO2 injection with coupled thermal processes
(Peer reviewed; Journal article, 2014)Large-scale models of carbon dioxide (CO2) storage in geological formations must capture the relevant physical, chemical and thermodynamic processes that affect the migration and ultimate fate of injected CO2. These processes ... -
Modified action and differential operators on the 3-D sub-Riemannian sphere
(Peer reviewed; Journal article, 2010-12)Our main aim is to present a geometrically meaningful formula for the fundamental solutions to a second order sub-elliptic differential equation and to the heat equation associated with a sub-elliptic operator in the ... -
Moduli of curves on Enriques surfaces
(Journal article; Peer reviewed, 2020)We compute the number of moduli of all irreducible components of the moduli space of smooth curves on Enriques surfaces. In most cases, the moduli maps to the moduli space of Prym curves are generically injective or dominant. ... -
Moduli of non-standard Nikulin surfaces in low genus
(Journal article; Peer reviewed, 2020)Primitively polarized genus g Nikulin surfaces (S, M, H) are of two types, that we call standard and non-standard depending on whether the lattice embedding Z[H] ⊕⊥ N ⊂ Pic S is primitive. Here H is the genus g polarization ... -
Modulus method and its application to the theory of univalent functions
(Master thesis, 2011-05-23)This work is about the modulus method in univalent function theory. It is based on the notion of modulus of families of curves on Riemann surface and is turned out to be very useful in solving various extremal problems in ... -
Monolithic and splitting solution schemes for fully coupled quasi-static thermo-poroelasticity with nonlinear convective transport
(Journal article; Peer reviewed, 2020)This paper concerns monolithic and splitting-based iterative procedures for the coupled nonlinear thermo-poroelasticity model problem. The thermo-poroelastic model problem we consider is formulated as a three-field system ... -
Monotone Difference Approximation of BV Solutions to Degenerate Convection-Diffusion Equations
(Department of Applied Mathematics report, Research report, 1998-03) -
Monotonicity Conditions for Discretization of Parabolic Conservation Laws
(Master thesis, 2009-06-02)In the recent years monotonicity of control volume methods for elliptic equations has been studied. A discrete maximum principle is established in Keilegavlen et al. [18], and a set of monotonicity conditions on general ... -
MRI-based radiomic signatures for pretreatment prognostication in cervical cancer
(Journal article; Peer reviewed, 2023)Background Accurate pretherapeutic prognostication is important for tailoring treatment in cervical cancer (CC). Purpose To investigate whether pretreatment MRI-based radiomic signatures predict disease-specific ... -
Multidimensional Fourier Transform on Sparse Grids
(Master thesis, 2009-06-01)When working on multidimensional problems, the number of points needed when using a tensor product grid. This is known as the curse of dimensionality. In this thesis we propose a set of sparse grids, which can be used to ... -
Multilevel assimilation of inverted seismic data
(Doctoral thesis, 2023-04-14)I ensemble-basert data-assimilering (DA) er størrelsen på ensemblet vanligvis begrenset til hundre medlemmer. Rett frem bruk av ensemble-basert DA kan resultere i betydelig Monte Carlo-feil, som ofte viser seg som alvorlig ... -
Multiple bilinear time series models
(Statistical report no. 11, Research report, 1985-06)