Browsing Department of Mathematics by Title
Now showing items 605624 of 1053

Nonlinear equations of acoustics in inhomogeneous, thermoviscous fluids
(Department of Applied Mathematics report, Research report, 199103) 
A Nonlinear Formulation of Radiation Stress and Applications to Cnoidal Shoaling
(Journal article; Peer reviewed, 2021)In this article, we provide formulations of energy flux and radiation stress consistent with the scaling regime of the Korteweg–de Vries (KdV) equation. These quantities can be used to describe the shoaling of cnoidal waves ... 
A nonlinear multiscale model for blood circulation in a realistic vascular system
(Journal article; Peer reviewed, 2021)In the last decade, numerical models have become an increasingly important tool in biological and medical science. Numerical simulations contribute to a deeper understanding of physiology and are a powerful tool for better ... 
Nonlinear propagation and interaction of collinear sound beams
(Department of Applied Mathematics report, Research report, 198910) 
Nonlinear spectral analysis via the local Gaussian correlation
(Journal article, 2017)The spectral distribution \(f(\omega)\) of a stationary time series \(\{Y_t\}_{t\in\mathbb{Z}}\) can be used to investigate whether or not periodic structures are present in \(\{Y_t\}_{t\in\mathbb{Z}}\), but \(f(\omega)\) ... 
Nonlinear Spectral Analysis: A Local Gaussian Approach
(Journal article; Peer reviewed, 2022)The spectral distribution f(ω) of a stationary time series {Yt}t∈Z can be used to investigate whether or not periodic structures are present in {Yt}t∈Z, but f(ω) has some limitations due to its dependence on the autocovariances ... 
Nonlinear Spectrum Analysis based on the Local Gaussian Correlation and Model Selection for Copulas
(Doctoral thesis, 20171120) 
Nonlocal Models for Undular Bores
(Master thesis, 20220601) 
The Norwegian Stock Market:  A Local Gaussian Perspective
(Master thesis, 20130603)In this thesis, using daily returns from 18 stocks, oil price, exchange rates and the main index of the Oslo Stock Exchange over a period of 5 years, we investigate how the Local Gaussian Correlation can be used to describe ... 
A note on Front tracking and the Equivalence between Viscosity Solutions of HamiltonJacobi Equations And Entropy Solutions of scalar Conservation Laws.
(Department of Applied Mathematics report, Research report, 200001) 
A Note on Portfolio Management under nonGaussian Logreturns
(Department of Applied Mathematics report, Research report, 200002) 
A Note on Portfolio oprimization in a levy Market with local Substitution and habit formation
(Department of Applied Mathematics report, Research report, 200005) 
A note on Severi varieties of nodal curves on Enriques surfaces
(Journal article; Peer reviewed, 2020)Let L be a linear system on a smooth complex Enriques surface S whose general member is a smooth and irreducible curve of genus p, with L2 > 0, and let VL,δ(S) be the Severi variety of irreducible δnodal curves in ... 
A Note on the Stability of Steady Inviscid Helical Gas Flows
(Department of Applied Mathematics report, Research report, 197601) 
A Note on the Wave Field in the Surface Zone
(Department of Applied Mathematics report, Research report, 199107) 
A note on the Wick product
(Statistical report no. 23, Research report, 199303) 
Nowcasting COVID19 incidence indicators during the Italian first outbreak
(Journal article; Peer reviewed, 2021)A novel parametric regression model is proposed to fit incidence data typically collected during epidemics. The proposal is motivated by realtime monitoring and shortterm forecasting of the main epidemiological indicators ... 
A numerical approach to ruin probability in finite time for fitted models with investment
(Journal article, 2012)In this paper we present a numerical method for solving a partial integrodifferential equation (PIDE) associated with ruin probability, when the surplus is continuously invested in stochastic assets. The method uses ... 
Numerical bifurcation for the capillary Whitham equation
(Journal article, 201703)The socalled Whitham equation arises in the modeling of free surface water waves, and combines a generic nonlinear quadratic term with the exact linear dispersion relation for gravity waves on the free surface of a fluid ... 
Numerical computation of a finite amplitude sound beam
(Department of Applied Mathematics report no. 81, Research report, 198611)